Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 1 | //===-- EmulateInstructionARM.cpp -------------------------------*- C++ -*-===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 10 | #include <stdlib.h> |
| 11 | |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12 | #include "EmulateInstructionARM.h" |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13 | #include "EmulationStateARM.h" |
Greg Clayton | 395fc33 | 2011-02-15 21:59:32 +0000 | [diff] [blame] | 14 | #include "lldb/Core/ArchSpec.h" |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 15 | #include "lldb/Core/Address.h" |
Greg Clayton | 8482ded | 2011-02-01 00:04:43 +0000 | [diff] [blame] | 16 | #include "lldb/Core/ConstString.h" |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 17 | #include "lldb/Core/PluginManager.h" |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 18 | #include "lldb/Core/Stream.h" |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 19 | #include "lldb/Symbol/UnwindPlan.h" |
Greg Clayton | 8482ded | 2011-02-01 00:04:43 +0000 | [diff] [blame] | 20 | |
Greg Clayton | f29a08f | 2011-02-09 17:41:27 +0000 | [diff] [blame] | 21 | #include "Plugins/Process/Utility/ARMDefines.h" |
| 22 | #include "Plugins/Process/Utility/ARMUtils.h" |
| 23 | #include "Utility/ARM_DWARF_Registers.h" |
| 24 | |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 25 | #include "llvm/Support/MathExtras.h" // for SignExtend32 template function |
Johnny Chen | 9307047 | 2011-02-04 23:02:47 +0000 | [diff] [blame] | 26 | // and CountTrailingZeros_32 function |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 27 | |
| 28 | using namespace lldb; |
| 29 | using namespace lldb_private; |
| 30 | |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 31 | // Convenient macro definitions. |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 32 | #define APSR_C Bit32(m_opcode_cpsr, CPSR_C_POS) |
| 33 | #define APSR_V Bit32(m_opcode_cpsr, CPSR_V_POS) |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 34 | |
Caroline Tice | f55261f | 2011-02-18 22:24:22 +0000 | [diff] [blame] | 35 | #define AlignPC(pc_val) (pc_val & 0xFFFFFFFC) |
| 36 | |
Johnny Chen | 0e00af2 | 2011-02-10 19:40:42 +0000 | [diff] [blame] | 37 | //---------------------------------------------------------------------- |
| 38 | // |
| 39 | // ITSession implementation |
| 40 | // |
| 41 | //---------------------------------------------------------------------- |
| 42 | |
Johnny Chen | 9307047 | 2011-02-04 23:02:47 +0000 | [diff] [blame] | 43 | // A8.6.50 |
| 44 | // Valid return values are {1, 2, 3, 4}, with 0 signifying an error condition. |
Greg Clayton | 04d397c | 2011-05-23 18:04:09 +0000 | [diff] [blame] | 45 | static uint32_t |
| 46 | CountITSize (uint32_t ITMask) { |
Johnny Chen | 9307047 | 2011-02-04 23:02:47 +0000 | [diff] [blame] | 47 | // First count the trailing zeros of the IT mask. |
Greg Clayton | 04d397c | 2011-05-23 18:04:09 +0000 | [diff] [blame] | 48 | uint32_t TZ = llvm::CountTrailingZeros_32(ITMask); |
Johnny Chen | 9307047 | 2011-02-04 23:02:47 +0000 | [diff] [blame] | 49 | if (TZ > 3) |
| 50 | { |
| 51 | printf("Encoding error: IT Mask '0000'\n"); |
| 52 | return 0; |
| 53 | } |
| 54 | return (4 - TZ); |
| 55 | } |
| 56 | |
| 57 | // Init ITState. Note that at least one bit is always 1 in mask. |
Greg Clayton | 04d397c | 2011-05-23 18:04:09 +0000 | [diff] [blame] | 58 | bool ITSession::InitIT(uint32_t bits7_0) |
Johnny Chen | 9307047 | 2011-02-04 23:02:47 +0000 | [diff] [blame] | 59 | { |
| 60 | ITCounter = CountITSize(Bits32(bits7_0, 3, 0)); |
| 61 | if (ITCounter == 0) |
| 62 | return false; |
| 63 | |
| 64 | // A8.6.50 IT |
| 65 | unsigned short FirstCond = Bits32(bits7_0, 7, 4); |
| 66 | if (FirstCond == 0xF) |
| 67 | { |
| 68 | printf("Encoding error: IT FirstCond '1111'\n"); |
| 69 | return false; |
| 70 | } |
| 71 | if (FirstCond == 0xE && ITCounter != 1) |
| 72 | { |
| 73 | printf("Encoding error: IT FirstCond '1110' && Mask != '1000'\n"); |
| 74 | return false; |
| 75 | } |
| 76 | |
| 77 | ITState = bits7_0; |
| 78 | return true; |
| 79 | } |
| 80 | |
| 81 | // Update ITState if necessary. |
| 82 | void ITSession::ITAdvance() |
| 83 | { |
Greg Clayton | e1f47bb | 2011-06-02 22:23:35 +0000 | [diff] [blame] | 84 | //assert(ITCounter); |
Johnny Chen | 9307047 | 2011-02-04 23:02:47 +0000 | [diff] [blame] | 85 | --ITCounter; |
| 86 | if (ITCounter == 0) |
| 87 | ITState = 0; |
| 88 | else |
| 89 | { |
| 90 | unsigned short NewITState4_0 = Bits32(ITState, 4, 0) << 1; |
| 91 | SetBits32(ITState, 4, 0, NewITState4_0); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | // Return true if we're inside an IT Block. |
| 96 | bool ITSession::InITBlock() |
| 97 | { |
| 98 | return ITCounter != 0; |
| 99 | } |
| 100 | |
Johnny Chen | c315f86 | 2011-02-05 00:46:10 +0000 | [diff] [blame] | 101 | // Return true if we're the last instruction inside an IT Block. |
| 102 | bool ITSession::LastInITBlock() |
| 103 | { |
| 104 | return ITCounter == 1; |
| 105 | } |
| 106 | |
Johnny Chen | 9307047 | 2011-02-04 23:02:47 +0000 | [diff] [blame] | 107 | // Get condition bits for the current thumb instruction. |
| 108 | uint32_t ITSession::GetCond() |
| 109 | { |
Johnny Chen | c315f86 | 2011-02-05 00:46:10 +0000 | [diff] [blame] | 110 | if (InITBlock()) |
| 111 | return Bits32(ITState, 7, 4); |
| 112 | else |
| 113 | return COND_AL; |
Johnny Chen | 9307047 | 2011-02-04 23:02:47 +0000 | [diff] [blame] | 114 | } |
| 115 | |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 116 | // ARM constants used during decoding |
| 117 | #define REG_RD 0 |
| 118 | #define LDM_REGLIST 1 |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 119 | #define SP_REG 13 |
| 120 | #define LR_REG 14 |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 121 | #define PC_REG 15 |
| 122 | #define PC_REGLIST_BIT 0x8000 |
| 123 | |
Johnny Chen | 251af6a | 2011-01-21 22:47:25 +0000 | [diff] [blame] | 124 | #define ARMv4 (1u << 0) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 125 | #define ARMv4T (1u << 1) |
| 126 | #define ARMv5T (1u << 2) |
| 127 | #define ARMv5TE (1u << 3) |
| 128 | #define ARMv5TEJ (1u << 4) |
Johnny Chen | 251af6a | 2011-01-21 22:47:25 +0000 | [diff] [blame] | 129 | #define ARMv6 (1u << 5) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 130 | #define ARMv6K (1u << 6) |
| 131 | #define ARMv6T2 (1u << 7) |
Johnny Chen | 251af6a | 2011-01-21 22:47:25 +0000 | [diff] [blame] | 132 | #define ARMv7 (1u << 8) |
Johnny Chen | 60c0d62 | 2011-01-25 23:49:39 +0000 | [diff] [blame] | 133 | #define ARMv8 (1u << 9) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 134 | #define ARMvAll (0xffffffffu) |
| 135 | |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 136 | #define ARMV4T_ABOVE (ARMv4T|ARMv5T|ARMv5TE|ARMv5TEJ|ARMv6|ARMv6K|ARMv6T2|ARMv7|ARMv8) |
| 137 | #define ARMV5_ABOVE (ARMv5T|ARMv5TE|ARMv5TEJ|ARMv6|ARMv6K|ARMv6T2|ARMv7|ARMv8) |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 138 | #define ARMV5TE_ABOVE (ARMv5TE|ARMv5TEJ|ARMv6|ARMv6K|ARMv6T2|ARMv7|ARMv8) |
Johnny Chen | 59e6ab7 | 2011-02-24 21:01:20 +0000 | [diff] [blame] | 139 | #define ARMV5J_ABOVE (ARMv5TEJ|ARMv6|ARMv6K|ARMv6T2|ARMv7|ARMv8) |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 140 | #define ARMV6_ABOVE (ARMv6|ARMv6K|ARMv6T2|ARMv7|ARMv8) |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 141 | #define ARMV6T2_ABOVE (ARMv6T2|ARMv7|ARMv8) |
Greg Clayton | 04d397c | 2011-05-23 18:04:09 +0000 | [diff] [blame] | 142 | #define ARMV7_ABOVE (ARMv7|ARMv8) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 143 | |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 144 | #define No_VFP 0 |
| 145 | #define VFPv1 (1u << 1) |
| 146 | #define VFPv2 (1u << 2) |
| 147 | #define VFPv3 (1u << 3) |
| 148 | #define AdvancedSIMD (1u << 4) |
| 149 | |
| 150 | #define VFPv1_ABOVE (VFPv1 | VFPv2 | VFPv3 | AdvancedSIMD) |
| 151 | #define VFPv2_ABOVE (VFPv2 | VFPv3 | AdvancedSIMD) |
| 152 | #define VFPv2v3 (VFPv2 | VFPv3) |
| 153 | |
Johnny Chen | 0e00af2 | 2011-02-10 19:40:42 +0000 | [diff] [blame] | 154 | //---------------------------------------------------------------------- |
| 155 | // |
| 156 | // EmulateInstructionARM implementation |
| 157 | // |
| 158 | //---------------------------------------------------------------------- |
| 159 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 160 | void |
| 161 | EmulateInstructionARM::Initialize () |
Johnny Chen | 7dc60e1 | 2011-01-24 19:46:32 +0000 | [diff] [blame] | 162 | { |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 163 | PluginManager::RegisterPlugin (GetPluginNameStatic (), |
| 164 | GetPluginDescriptionStatic (), |
| 165 | CreateInstance); |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 166 | } |
Johnny Chen | 7dc60e1 | 2011-01-24 19:46:32 +0000 | [diff] [blame] | 167 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 168 | void |
| 169 | EmulateInstructionARM::Terminate () |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 170 | { |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 171 | PluginManager::UnregisterPlugin (CreateInstance); |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 172 | } |
| 173 | |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 174 | const char * |
| 175 | EmulateInstructionARM::GetPluginNameStatic () |
| 176 | { |
| 177 | return "lldb.emulate-instruction.arm"; |
| 178 | } |
| 179 | |
| 180 | const char * |
| 181 | EmulateInstructionARM::GetPluginDescriptionStatic () |
| 182 | { |
| 183 | return "Emulate instructions for the ARM architecture."; |
| 184 | } |
| 185 | |
| 186 | EmulateInstruction * |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 187 | EmulateInstructionARM::CreateInstance (const ArchSpec &arch, InstructionType inst_type) |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 188 | { |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 189 | if (EmulateInstructionARM::SupportsEmulatingIntructionsOfTypeStatic(inst_type)) |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 190 | { |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 191 | if (arch.GetTriple().getArch() == llvm::Triple::arm) |
| 192 | { |
| 193 | std::auto_ptr<EmulateInstructionARM> emulate_insn_ap (new EmulateInstructionARM (arch)); |
| 194 | |
| 195 | if (emulate_insn_ap.get()) |
| 196 | return emulate_insn_ap.release(); |
| 197 | } |
| 198 | else if (arch.GetTriple().getArch() == llvm::Triple::thumb) |
| 199 | { |
| 200 | std::auto_ptr<EmulateInstructionARM> emulate_insn_ap (new EmulateInstructionARM (arch)); |
| 201 | |
| 202 | if (emulate_insn_ap.get()) |
| 203 | return emulate_insn_ap.release(); |
| 204 | } |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 205 | } |
| 206 | |
| 207 | return NULL; |
| 208 | } |
| 209 | |
| 210 | bool |
| 211 | EmulateInstructionARM::SetTargetTriple (const ArchSpec &arch) |
| 212 | { |
| 213 | if (arch.GetTriple().getArch () == llvm::Triple::arm) |
| 214 | return true; |
| 215 | else if (arch.GetTriple().getArch () == llvm::Triple::thumb) |
| 216 | return true; |
| 217 | |
| 218 | return false; |
| 219 | } |
| 220 | |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 221 | // Write "bits (32) UNKNOWN" to memory address "address". Helper function for many ARM instructions. |
| 222 | bool |
| 223 | EmulateInstructionARM::WriteBits32UnknownToMemory (addr_t address) |
| 224 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 225 | EmulateInstruction::Context context; |
| 226 | context.type = EmulateInstruction::eContextWriteMemoryRandomBits; |
| 227 | context.SetNoArgs (); |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 228 | |
| 229 | uint32_t random_data = rand (); |
| 230 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 231 | |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 232 | if (!MemAWrite (context, address, random_data, addr_byte_size)) |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 233 | return false; |
| 234 | |
| 235 | return true; |
| 236 | } |
| 237 | |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 238 | // Write "bits (32) UNKNOWN" to register n. Helper function for many ARM instructions. |
| 239 | bool |
| 240 | EmulateInstructionARM::WriteBits32Unknown (int n) |
| 241 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 242 | EmulateInstruction::Context context; |
| 243 | context.type = EmulateInstruction::eContextWriteRegisterRandomBits; |
| 244 | context.SetNoArgs (); |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 245 | |
Johnny Chen | 62ff6f5 | 2011-02-11 18:11:22 +0000 | [diff] [blame] | 246 | bool success; |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 247 | uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 248 | |
| 249 | if (!success) |
| 250 | return false; |
| 251 | |
| 252 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, data)) |
| 253 | return false; |
| 254 | |
| 255 | return true; |
| 256 | } |
| 257 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 258 | bool |
| 259 | EmulateInstructionARM::GetRegisterInfo (uint32_t reg_kind, uint32_t reg_num, RegisterInfo ®_info) |
| 260 | { |
| 261 | if (reg_kind == eRegisterKindGeneric) |
| 262 | { |
| 263 | switch (reg_num) |
| 264 | { |
| 265 | case LLDB_REGNUM_GENERIC_PC: reg_kind = eRegisterKindDWARF; reg_num = dwarf_pc; break; |
| 266 | case LLDB_REGNUM_GENERIC_SP: reg_kind = eRegisterKindDWARF; reg_num = dwarf_sp; break; |
| 267 | case LLDB_REGNUM_GENERIC_FP: reg_kind = eRegisterKindDWARF; reg_num = dwarf_r7; break; |
| 268 | case LLDB_REGNUM_GENERIC_RA: reg_kind = eRegisterKindDWARF; reg_num = dwarf_lr; break; |
| 269 | case LLDB_REGNUM_GENERIC_FLAGS: reg_kind = eRegisterKindDWARF; reg_num = dwarf_cpsr; break; |
| 270 | default: return false; |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | if (reg_kind == eRegisterKindDWARF) |
| 275 | return GetARMDWARFRegisterInfo(reg_num, reg_info); |
| 276 | return false; |
| 277 | } |
| 278 | |
Greg Clayton | 04d397c | 2011-05-23 18:04:09 +0000 | [diff] [blame] | 279 | uint32_t |
| 280 | EmulateInstructionARM::GetFramePointerRegisterNumber () const |
| 281 | { |
| 282 | if (m_opcode_mode == eModeThumb || m_arch.GetTriple().getOS() == llvm::Triple::Darwin) |
| 283 | return 7; |
| 284 | else |
| 285 | return 11; |
| 286 | } |
| 287 | |
| 288 | uint32_t |
| 289 | EmulateInstructionARM::GetFramePointerDWARFRegisterNumber () const |
| 290 | { |
| 291 | if (m_opcode_mode == eModeThumb || m_arch.GetTriple().getOS() == llvm::Triple::Darwin) |
| 292 | return dwarf_r7; |
| 293 | else |
| 294 | return dwarf_r11; |
| 295 | } |
| 296 | |
Johnny Chen | 08c25e8 | 2011-01-31 18:02:28 +0000 | [diff] [blame] | 297 | // Push Multiple Registers stores multiple registers to the stack, storing to |
| 298 | // consecutive memory locations ending just below the address in SP, and updates |
| 299 | // SP to point to the start of the stored data. |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 300 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 301 | EmulateInstructionARM::EmulatePUSH (const uint32_t opcode, const ARMEncoding encoding) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 302 | { |
| 303 | #if 0 |
| 304 | // ARM pseudo code... |
| 305 | if (ConditionPassed()) |
| 306 | { |
| 307 | EncodingSpecificOperations(); |
| 308 | NullCheckIfThumbEE(13); |
| 309 | address = SP - 4*BitCount(registers); |
| 310 | |
| 311 | for (i = 0 to 14) |
| 312 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 313 | if (registers<i> == '1') |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 314 | { |
| 315 | if i == 13 && i != LowestSetBit(registers) // Only possible for encoding A1 |
| 316 | MemA[address,4] = bits(32) UNKNOWN; |
| 317 | else |
| 318 | MemA[address,4] = R[i]; |
| 319 | address = address + 4; |
| 320 | } |
| 321 | } |
| 322 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 323 | if (registers<15> == '1') // Only possible for encoding A1 or A2 |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 324 | MemA[address,4] = PCStoreValue(); |
| 325 | |
| 326 | SP = SP - 4*BitCount(registers); |
| 327 | } |
| 328 | #endif |
| 329 | |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 330 | bool conditional = false; |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 331 | bool success = false; |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 332 | if (ConditionPassed(opcode, &conditional)) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 333 | { |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 334 | const uint32_t addr_byte_size = GetAddressByteSize(); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 335 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 336 | if (!success) |
| 337 | return false; |
Johnny Chen | 3c75c76 | 2011-01-22 00:47:08 +0000 | [diff] [blame] | 338 | uint32_t registers = 0; |
Johnny Chen | 91d9986 | 2011-01-25 19:07:04 +0000 | [diff] [blame] | 339 | uint32_t Rt; // the source register |
Johnny Chen | 3c75c76 | 2011-01-22 00:47:08 +0000 | [diff] [blame] | 340 | switch (encoding) { |
Johnny Chen | aedde1c | 2011-01-24 20:38:45 +0000 | [diff] [blame] | 341 | case eEncodingT1: |
Johnny Chen | 108d5aa | 2011-01-26 01:00:55 +0000 | [diff] [blame] | 342 | registers = Bits32(opcode, 7, 0); |
Johnny Chen | aedde1c | 2011-01-24 20:38:45 +0000 | [diff] [blame] | 343 | // The M bit represents LR. |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 344 | if (Bit32(opcode, 8)) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 345 | registers |= (1u << 14); |
Johnny Chen | aedde1c | 2011-01-24 20:38:45 +0000 | [diff] [blame] | 346 | // if BitCount(registers) < 1 then UNPREDICTABLE; |
| 347 | if (BitCount(registers) < 1) |
| 348 | return false; |
| 349 | break; |
Johnny Chen | 7dc60e1 | 2011-01-24 19:46:32 +0000 | [diff] [blame] | 350 | case eEncodingT2: |
| 351 | // Ignore bits 15 & 13. |
Johnny Chen | 108d5aa | 2011-01-26 01:00:55 +0000 | [diff] [blame] | 352 | registers = Bits32(opcode, 15, 0) & ~0xa000; |
Johnny Chen | 7dc60e1 | 2011-01-24 19:46:32 +0000 | [diff] [blame] | 353 | // if BitCount(registers) < 2 then UNPREDICTABLE; |
| 354 | if (BitCount(registers) < 2) |
| 355 | return false; |
| 356 | break; |
| 357 | case eEncodingT3: |
Johnny Chen | 108d5aa | 2011-01-26 01:00:55 +0000 | [diff] [blame] | 358 | Rt = Bits32(opcode, 15, 12); |
Johnny Chen | 7dc60e1 | 2011-01-24 19:46:32 +0000 | [diff] [blame] | 359 | // if BadReg(t) then UNPREDICTABLE; |
Johnny Chen | 91d9986 | 2011-01-25 19:07:04 +0000 | [diff] [blame] | 360 | if (BadReg(Rt)) |
Johnny Chen | 7dc60e1 | 2011-01-24 19:46:32 +0000 | [diff] [blame] | 361 | return false; |
Johnny Chen | 91d9986 | 2011-01-25 19:07:04 +0000 | [diff] [blame] | 362 | registers = (1u << Rt); |
Johnny Chen | 7dc60e1 | 2011-01-24 19:46:32 +0000 | [diff] [blame] | 363 | break; |
Johnny Chen | 3c75c76 | 2011-01-22 00:47:08 +0000 | [diff] [blame] | 364 | case eEncodingA1: |
Johnny Chen | 108d5aa | 2011-01-26 01:00:55 +0000 | [diff] [blame] | 365 | registers = Bits32(opcode, 15, 0); |
Johnny Chen | a33d484 | 2011-01-24 22:25:48 +0000 | [diff] [blame] | 366 | // Instead of return false, let's handle the following case as well, |
| 367 | // which amounts to pushing one reg onto the full descending stacks. |
| 368 | // if BitCount(register_list) < 2 then SEE STMDB / STMFD; |
Johnny Chen | 3c75c76 | 2011-01-22 00:47:08 +0000 | [diff] [blame] | 369 | break; |
| 370 | case eEncodingA2: |
Johnny Chen | 108d5aa | 2011-01-26 01:00:55 +0000 | [diff] [blame] | 371 | Rt = Bits32(opcode, 15, 12); |
Johnny Chen | 7dc60e1 | 2011-01-24 19:46:32 +0000 | [diff] [blame] | 372 | // if t == 13 then UNPREDICTABLE; |
Johnny Chen | 91d9986 | 2011-01-25 19:07:04 +0000 | [diff] [blame] | 373 | if (Rt == dwarf_sp) |
Johnny Chen | 3c75c76 | 2011-01-22 00:47:08 +0000 | [diff] [blame] | 374 | return false; |
Johnny Chen | 91d9986 | 2011-01-25 19:07:04 +0000 | [diff] [blame] | 375 | registers = (1u << Rt); |
Johnny Chen | 3c75c76 | 2011-01-22 00:47:08 +0000 | [diff] [blame] | 376 | break; |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 377 | default: |
| 378 | return false; |
Johnny Chen | 3c75c76 | 2011-01-22 00:47:08 +0000 | [diff] [blame] | 379 | } |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 380 | addr_t sp_offset = addr_byte_size * BitCount (registers); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 381 | addr_t addr = sp - sp_offset; |
| 382 | uint32_t i; |
| 383 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 384 | EmulateInstruction::Context context; |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 385 | if (conditional) |
| 386 | context.type = EmulateInstruction::eContextRegisterStore; |
| 387 | else |
| 388 | context.type = EmulateInstruction::eContextPushRegisterOnStack; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 389 | RegisterInfo reg_info; |
| 390 | RegisterInfo sp_reg; |
| 391 | GetRegisterInfo (eRegisterKindDWARF, dwarf_sp, sp_reg); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 392 | for (i=0; i<15; ++i) |
| 393 | { |
Johnny Chen | 7c1bf92 | 2011-02-08 23:49:37 +0000 | [diff] [blame] | 394 | if (BitIsSet (registers, i)) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 395 | { |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 396 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + i, reg_info); |
| 397 | context.SetRegisterToRegisterPlusOffset (reg_info, sp_reg, addr - sp); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 398 | uint32_t reg_value = ReadCoreReg(i, &success); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 399 | if (!success) |
| 400 | return false; |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 401 | if (!MemAWrite (context, addr, reg_value, addr_byte_size)) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 402 | return false; |
| 403 | addr += addr_byte_size; |
| 404 | } |
| 405 | } |
| 406 | |
Johnny Chen | 7c1bf92 | 2011-02-08 23:49:37 +0000 | [diff] [blame] | 407 | if (BitIsSet (registers, 15)) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 408 | { |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 409 | GetRegisterInfo (eRegisterKindDWARF, dwarf_pc, reg_info); |
| 410 | context.SetRegisterPlusOffset (reg_info, addr - sp); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 411 | const uint32_t pc = ReadCoreReg(PC_REG, &success); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 412 | if (!success) |
| 413 | return false; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 414 | if (!MemAWrite (context, addr, pc, addr_byte_size)) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 415 | return false; |
| 416 | } |
| 417 | |
| 418 | context.type = EmulateInstruction::eContextAdjustStackPointer; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 419 | context.SetImmediateSigned (-sp_offset); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 420 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 421 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP, sp - sp_offset)) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 422 | return false; |
| 423 | } |
| 424 | return true; |
| 425 | } |
| 426 | |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 427 | // Pop Multiple Registers loads multiple registers from the stack, loading from |
| 428 | // consecutive memory locations staring at the address in SP, and updates |
| 429 | // SP to point just above the loaded data. |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 430 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 431 | EmulateInstructionARM::EmulatePOP (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 432 | { |
| 433 | #if 0 |
| 434 | // ARM pseudo code... |
| 435 | if (ConditionPassed()) |
| 436 | { |
| 437 | EncodingSpecificOperations(); NullCheckIfThumbEE(13); |
| 438 | address = SP; |
| 439 | for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 440 | if registers<i> == '1' then |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 441 | R[i] = if UnalignedAllowed then MemU[address,4] else MemA[address,4]; address = address + 4; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 442 | if registers<15> == '1' then |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 443 | if UnalignedAllowed then |
| 444 | LoadWritePC(MemU[address,4]); |
| 445 | else |
| 446 | LoadWritePC(MemA[address,4]); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 447 | if registers<13> == '0' then SP = SP + 4*BitCount(registers); |
| 448 | if registers<13> == '1' then SP = bits(32) UNKNOWN; |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 449 | } |
| 450 | #endif |
| 451 | |
| 452 | bool success = false; |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 453 | |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 454 | bool conditional = false; |
| 455 | if (ConditionPassed(opcode, &conditional)) |
| 456 | { |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 457 | const uint32_t addr_byte_size = GetAddressByteSize(); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 458 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 459 | if (!success) |
| 460 | return false; |
| 461 | uint32_t registers = 0; |
| 462 | uint32_t Rt; // the destination register |
| 463 | switch (encoding) { |
| 464 | case eEncodingT1: |
| 465 | registers = Bits32(opcode, 7, 0); |
| 466 | // The P bit represents PC. |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 467 | if (Bit32(opcode, 8)) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 468 | registers |= (1u << 15); |
| 469 | // if BitCount(registers) < 1 then UNPREDICTABLE; |
| 470 | if (BitCount(registers) < 1) |
| 471 | return false; |
| 472 | break; |
| 473 | case eEncodingT2: |
| 474 | // Ignore bit 13. |
| 475 | registers = Bits32(opcode, 15, 0) & ~0x2000; |
| 476 | // if BitCount(registers) < 2 || (P == '1' && M == '1') then UNPREDICTABLE; |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 477 | if (BitCount(registers) < 2 || (Bit32(opcode, 15) && Bit32(opcode, 14))) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 478 | return false; |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 479 | // if registers<15> == '1' && InITBlock() && !LastInITBlock() then UNPREDICTABLE; |
| 480 | if (BitIsSet(registers, 15) && InITBlock() && !LastInITBlock()) |
| 481 | return false; |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 482 | break; |
| 483 | case eEncodingT3: |
| 484 | Rt = Bits32(opcode, 15, 12); |
| 485 | // if t == 13 || (t == 15 && InITBlock() && !LastInITBlock()) then UNPREDICTABLE; |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 486 | if (Rt == 13) |
| 487 | return false; |
| 488 | if (Rt == 15 && InITBlock() && !LastInITBlock()) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 489 | return false; |
| 490 | registers = (1u << Rt); |
| 491 | break; |
| 492 | case eEncodingA1: |
| 493 | registers = Bits32(opcode, 15, 0); |
| 494 | // Instead of return false, let's handle the following case as well, |
| 495 | // which amounts to popping one reg from the full descending stacks. |
| 496 | // if BitCount(register_list) < 2 then SEE LDM / LDMIA / LDMFD; |
| 497 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 498 | // if registers<13> == '1' && ArchVersion() >= 7 then UNPREDICTABLE; |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 499 | if (BitIsSet(opcode, 13) && ArchVersion() >= ARMv7) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 500 | return false; |
| 501 | break; |
| 502 | case eEncodingA2: |
| 503 | Rt = Bits32(opcode, 15, 12); |
| 504 | // if t == 13 then UNPREDICTABLE; |
| 505 | if (Rt == dwarf_sp) |
| 506 | return false; |
| 507 | registers = (1u << Rt); |
| 508 | break; |
| 509 | default: |
| 510 | return false; |
| 511 | } |
| 512 | addr_t sp_offset = addr_byte_size * BitCount (registers); |
| 513 | addr_t addr = sp; |
| 514 | uint32_t i, data; |
| 515 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 516 | EmulateInstruction::Context context; |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 517 | if (conditional) |
| 518 | context.type = EmulateInstruction::eContextRegisterLoad; |
| 519 | else |
| 520 | context.type = EmulateInstruction::eContextPopRegisterOffStack; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 521 | |
| 522 | RegisterInfo sp_reg; |
| 523 | GetRegisterInfo (eRegisterKindDWARF, dwarf_sp, sp_reg); |
| 524 | |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 525 | for (i=0; i<15; ++i) |
| 526 | { |
Johnny Chen | 7c1bf92 | 2011-02-08 23:49:37 +0000 | [diff] [blame] | 527 | if (BitIsSet (registers, i)) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 528 | { |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 529 | context.SetRegisterPlusOffset (sp_reg, addr - sp); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 530 | data = MemARead(context, addr, 4, 0, &success); |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 531 | if (!success) |
| 532 | return false; |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 533 | if (!WriteRegisterUnsigned(context, eRegisterKindDWARF, dwarf_r0 + i, data)) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 534 | return false; |
| 535 | addr += addr_byte_size; |
| 536 | } |
| 537 | } |
| 538 | |
Johnny Chen | 7c1bf92 | 2011-02-08 23:49:37 +0000 | [diff] [blame] | 539 | if (BitIsSet (registers, 15)) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 540 | { |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 541 | context.SetRegisterPlusOffset (sp_reg, addr - sp); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 542 | data = MemARead(context, addr, 4, 0, &success); |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 543 | if (!success) |
| 544 | return false; |
Johnny Chen | f3eaacf | 2011-02-09 19:30:49 +0000 | [diff] [blame] | 545 | // In ARMv5T and above, this is an interworking branch. |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 546 | if (!LoadWritePC(context, data)) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 547 | return false; |
| 548 | addr += addr_byte_size; |
| 549 | } |
| 550 | |
| 551 | context.type = EmulateInstruction::eContextAdjustStackPointer; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 552 | context.SetImmediateSigned (sp_offset); |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 553 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 554 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP, sp + sp_offset)) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 555 | return false; |
| 556 | } |
| 557 | return true; |
| 558 | } |
| 559 | |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 560 | // Set r7 or ip to point to saved value residing within the stack. |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 561 | // ADD (SP plus immediate) |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 562 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 563 | EmulateInstructionARM::EmulateADDRdSPImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 564 | { |
| 565 | #if 0 |
| 566 | // ARM pseudo code... |
| 567 | if (ConditionPassed()) |
| 568 | { |
| 569 | EncodingSpecificOperations(); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 570 | (result, carry, overflow) = AddWithCarry(SP, imm32, '0'); |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 571 | if d == 15 then |
| 572 | ALUWritePC(result); // setflags is always FALSE here |
| 573 | else |
| 574 | R[d] = result; |
| 575 | if setflags then |
| 576 | APSR.N = result<31>; |
| 577 | APSR.Z = IsZeroBit(result); |
| 578 | APSR.C = carry; |
| 579 | APSR.V = overflow; |
| 580 | } |
| 581 | #endif |
| 582 | |
| 583 | bool success = false; |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 584 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 585 | if (ConditionPassed(opcode)) |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 586 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 587 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 588 | if (!success) |
| 589 | return false; |
| 590 | uint32_t Rd; // the destination register |
| 591 | uint32_t imm32; |
| 592 | switch (encoding) { |
| 593 | case eEncodingT1: |
| 594 | Rd = 7; |
| 595 | imm32 = Bits32(opcode, 7, 0) << 2; // imm32 = ZeroExtend(imm8:'00', 32) |
| 596 | break; |
| 597 | case eEncodingA1: |
| 598 | Rd = Bits32(opcode, 15, 12); |
| 599 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
| 600 | break; |
| 601 | default: |
| 602 | return false; |
| 603 | } |
| 604 | addr_t sp_offset = imm32; |
| 605 | addr_t addr = sp + sp_offset; // a pointer to the stack area |
| 606 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 607 | EmulateInstruction::Context context; |
Greg Clayton | 75906e4 | 2011-05-11 18:39:18 +0000 | [diff] [blame] | 608 | context.type = eContextSetFramePointer; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 609 | RegisterInfo sp_reg; |
| 610 | GetRegisterInfo (eRegisterKindDWARF, dwarf_sp, sp_reg); |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 611 | context.SetRegisterPlusOffset (sp_reg, sp_offset); |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 612 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 613 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + Rd, addr)) |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 614 | return false; |
| 615 | } |
| 616 | return true; |
| 617 | } |
| 618 | |
Johnny Chen | 2ccad83 | 2011-01-28 19:57:25 +0000 | [diff] [blame] | 619 | // Set r7 or ip to the current stack pointer. |
| 620 | // MOV (register) |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 621 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 622 | EmulateInstructionARM::EmulateMOVRdSP (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 2ccad83 | 2011-01-28 19:57:25 +0000 | [diff] [blame] | 623 | { |
| 624 | #if 0 |
| 625 | // ARM pseudo code... |
| 626 | if (ConditionPassed()) |
| 627 | { |
| 628 | EncodingSpecificOperations(); |
| 629 | result = R[m]; |
| 630 | if d == 15 then |
| 631 | ALUWritePC(result); // setflags is always FALSE here |
| 632 | else |
| 633 | R[d] = result; |
| 634 | if setflags then |
| 635 | APSR.N = result<31>; |
| 636 | APSR.Z = IsZeroBit(result); |
| 637 | // APSR.C unchanged |
| 638 | // APSR.V unchanged |
| 639 | } |
| 640 | #endif |
| 641 | |
| 642 | bool success = false; |
Johnny Chen | 2ccad83 | 2011-01-28 19:57:25 +0000 | [diff] [blame] | 643 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 644 | if (ConditionPassed(opcode)) |
Johnny Chen | 2ccad83 | 2011-01-28 19:57:25 +0000 | [diff] [blame] | 645 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 646 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | 2ccad83 | 2011-01-28 19:57:25 +0000 | [diff] [blame] | 647 | if (!success) |
| 648 | return false; |
| 649 | uint32_t Rd; // the destination register |
| 650 | switch (encoding) { |
| 651 | case eEncodingT1: |
| 652 | Rd = 7; |
| 653 | break; |
| 654 | case eEncodingA1: |
| 655 | Rd = 12; |
| 656 | break; |
| 657 | default: |
| 658 | return false; |
| 659 | } |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 660 | |
| 661 | EmulateInstruction::Context context; |
Greg Clayton | 04d397c | 2011-05-23 18:04:09 +0000 | [diff] [blame] | 662 | if (Rd == GetFramePointerRegisterNumber()) |
| 663 | context.type = EmulateInstruction::eContextSetFramePointer; |
| 664 | else |
| 665 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 666 | RegisterInfo sp_reg; |
| 667 | GetRegisterInfo (eRegisterKindDWARF, dwarf_sp, sp_reg); |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 668 | context.SetRegisterPlusOffset (sp_reg, 0); |
Johnny Chen | 2ccad83 | 2011-01-28 19:57:25 +0000 | [diff] [blame] | 669 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 670 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + Rd, sp)) |
Johnny Chen | 2ccad83 | 2011-01-28 19:57:25 +0000 | [diff] [blame] | 671 | return false; |
| 672 | } |
| 673 | return true; |
| 674 | } |
| 675 | |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 676 | // Move from high register (r8-r15) to low register (r0-r7). |
| 677 | // MOV (register) |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 678 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 679 | EmulateInstructionARM::EmulateMOVLowHigh (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 680 | { |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 681 | return EmulateMOVRdRm (opcode, encoding); |
Johnny Chen | 338bf54 | 2011-02-10 19:29:03 +0000 | [diff] [blame] | 682 | } |
| 683 | |
| 684 | // Move from register to register. |
| 685 | // MOV (register) |
| 686 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 687 | EmulateInstructionARM::EmulateMOVRdRm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 338bf54 | 2011-02-10 19:29:03 +0000 | [diff] [blame] | 688 | { |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 689 | #if 0 |
| 690 | // ARM pseudo code... |
| 691 | if (ConditionPassed()) |
| 692 | { |
| 693 | EncodingSpecificOperations(); |
| 694 | result = R[m]; |
| 695 | if d == 15 then |
| 696 | ALUWritePC(result); // setflags is always FALSE here |
| 697 | else |
| 698 | R[d] = result; |
| 699 | if setflags then |
| 700 | APSR.N = result<31>; |
| 701 | APSR.Z = IsZeroBit(result); |
| 702 | // APSR.C unchanged |
| 703 | // APSR.V unchanged |
| 704 | } |
| 705 | #endif |
| 706 | |
| 707 | bool success = false; |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 708 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 709 | if (ConditionPassed(opcode)) |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 710 | { |
| 711 | uint32_t Rm; // the source register |
| 712 | uint32_t Rd; // the destination register |
Johnny Chen | 338bf54 | 2011-02-10 19:29:03 +0000 | [diff] [blame] | 713 | bool setflags; |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 714 | switch (encoding) { |
| 715 | case eEncodingT1: |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 716 | Rd = Bit32(opcode, 7) << 3 | Bits32(opcode, 2, 0); |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 717 | Rm = Bits32(opcode, 6, 3); |
Johnny Chen | 338bf54 | 2011-02-10 19:29:03 +0000 | [diff] [blame] | 718 | setflags = false; |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 719 | if (Rd == 15 && InITBlock() && !LastInITBlock()) |
| 720 | return false; |
Johnny Chen | 338bf54 | 2011-02-10 19:29:03 +0000 | [diff] [blame] | 721 | break; |
| 722 | case eEncodingT2: |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 723 | Rd = Bits32(opcode, 2, 0); |
Johnny Chen | 338bf54 | 2011-02-10 19:29:03 +0000 | [diff] [blame] | 724 | Rm = Bits32(opcode, 5, 3); |
Johnny Chen | 338bf54 | 2011-02-10 19:29:03 +0000 | [diff] [blame] | 725 | setflags = true; |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 726 | if (InITBlock()) |
| 727 | return false; |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 728 | break; |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 729 | case eEncodingT3: |
| 730 | Rd = Bits32(opcode, 11, 8); |
| 731 | Rm = Bits32(opcode, 3, 0); |
| 732 | setflags = BitIsSet(opcode, 20); |
| 733 | // if setflags && (BadReg(d) || BadReg(m)) then UNPREDICTABLE; |
| 734 | if (setflags && (BadReg(Rd) || BadReg(Rm))) |
| 735 | return false; |
| 736 | // if !setflags && (d == 15 || m == 15 || (d == 13 && m == 13)) then UNPREDICTABLE; |
| 737 | if (!setflags && (Rd == 15 || Rm == 15 || (Rd == 13 && Rm == 13))) |
| 738 | return false; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 739 | break; |
Johnny Chen | 01d6157 | 2011-02-25 00:23:25 +0000 | [diff] [blame] | 740 | case eEncodingA1: |
| 741 | Rd = Bits32(opcode, 15, 12); |
| 742 | Rm = Bits32(opcode, 3, 0); |
| 743 | setflags = BitIsSet(opcode, 20); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 744 | |
Johnny Chen | 01d6157 | 2011-02-25 00:23:25 +0000 | [diff] [blame] | 745 | // if Rd == '1111' && S == '1' then SEE SUBS PC, LR and related instructions; |
Johnny Chen | 01d6157 | 2011-02-25 00:23:25 +0000 | [diff] [blame] | 746 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 747 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 01d6157 | 2011-02-25 00:23:25 +0000 | [diff] [blame] | 748 | break; |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 749 | default: |
| 750 | return false; |
| 751 | } |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 752 | uint32_t result = ReadCoreReg(Rm, &success); |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 753 | if (!success) |
| 754 | return false; |
| 755 | |
| 756 | // The context specifies that Rm is to be moved into Rd. |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 757 | EmulateInstruction::Context context; |
Caroline Tice | 2b03ed8 | 2011-03-16 00:06:12 +0000 | [diff] [blame] | 758 | context.type = EmulateInstruction::eContextRegisterLoad; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 759 | RegisterInfo dwarf_reg; |
| 760 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + Rm, dwarf_reg); |
Caroline Tice | 2b03ed8 | 2011-03-16 00:06:12 +0000 | [diff] [blame] | 761 | context.SetRegister (dwarf_reg); |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 762 | |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 763 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags)) |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 764 | return false; |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 765 | } |
| 766 | return true; |
| 767 | } |
| 768 | |
Johnny Chen | 357c30f | 2011-02-14 22:04:25 +0000 | [diff] [blame] | 769 | // Move (immediate) writes an immediate value to the destination register. It |
| 770 | // can optionally update the condition flags based on the value. |
| 771 | // MOV (immediate) |
| 772 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 773 | EmulateInstructionARM::EmulateMOVRdImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 357c30f | 2011-02-14 22:04:25 +0000 | [diff] [blame] | 774 | { |
| 775 | #if 0 |
| 776 | // ARM pseudo code... |
| 777 | if (ConditionPassed()) |
| 778 | { |
| 779 | EncodingSpecificOperations(); |
| 780 | result = imm32; |
| 781 | if d == 15 then // Can only occur for ARM encoding |
| 782 | ALUWritePC(result); // setflags is always FALSE here |
| 783 | else |
| 784 | R[d] = result; |
| 785 | if setflags then |
| 786 | APSR.N = result<31>; |
| 787 | APSR.Z = IsZeroBit(result); |
| 788 | APSR.C = carry; |
| 789 | // APSR.V unchanged |
| 790 | } |
| 791 | #endif |
Johnny Chen | 357c30f | 2011-02-14 22:04:25 +0000 | [diff] [blame] | 792 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 793 | if (ConditionPassed(opcode)) |
Johnny Chen | 357c30f | 2011-02-14 22:04:25 +0000 | [diff] [blame] | 794 | { |
| 795 | uint32_t Rd; // the destination register |
Johnny Chen | 357c30f | 2011-02-14 22:04:25 +0000 | [diff] [blame] | 796 | uint32_t imm32; // the immediate value to be written to Rd |
Johnny Chen | 65f39ed | 2011-08-12 01:10:45 +0000 | [diff] [blame] | 797 | uint32_t carry = 0; // the carry bit after ThumbExpandImm_C or ARMExpandImm_C. |
| 798 | // for setflags == false, this value is a don't care |
| 799 | // initialized to 0 to silence the static analyzer |
Johnny Chen | 357c30f | 2011-02-14 22:04:25 +0000 | [diff] [blame] | 800 | bool setflags; |
| 801 | switch (encoding) { |
Caroline Tice | 89c6d58 | 2011-03-29 19:53:44 +0000 | [diff] [blame] | 802 | case eEncodingT1: |
| 803 | Rd = Bits32(opcode, 10, 8); |
| 804 | setflags = !InITBlock(); |
| 805 | imm32 = Bits32(opcode, 7, 0); // imm32 = ZeroExtend(imm8, 32) |
| 806 | carry = APSR_C; |
| 807 | |
| 808 | break; |
| 809 | |
| 810 | case eEncodingT2: |
| 811 | Rd = Bits32(opcode, 11, 8); |
| 812 | setflags = BitIsSet(opcode, 20); |
| 813 | imm32 = ThumbExpandImm_C(opcode, APSR_C, carry); |
| 814 | if (BadReg(Rd)) |
| 815 | return false; |
| 816 | |
| 817 | break; |
| 818 | |
| 819 | case eEncodingT3: |
| 820 | { |
| 821 | // d = UInt(Rd); setflags = FALSE; imm32 = ZeroExtend(imm4:i:imm3:imm8, 32); |
| 822 | Rd = Bits32 (opcode, 11, 8); |
| 823 | setflags = false; |
| 824 | uint32_t imm4 = Bits32 (opcode, 19, 16); |
| 825 | uint32_t imm3 = Bits32 (opcode, 14, 12); |
| 826 | uint32_t i = Bit32 (opcode, 26); |
| 827 | uint32_t imm8 = Bits32 (opcode, 7, 0); |
| 828 | imm32 = (imm4 << 12) | (i << 11) | (imm3 << 8) | imm8; |
| 829 | |
| 830 | // if BadReg(d) then UNPREDICTABLE; |
| 831 | if (BadReg (Rd)) |
| 832 | return false; |
| 833 | } |
| 834 | break; |
| 835 | |
| 836 | case eEncodingA1: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 837 | // d = UInt(Rd); setflags = (S == Ô1Õ); (imm32, carry) = ARMExpandImm_C(imm12, APSR.C); |
Caroline Tice | 89c6d58 | 2011-03-29 19:53:44 +0000 | [diff] [blame] | 838 | Rd = Bits32 (opcode, 15, 12); |
| 839 | setflags = BitIsSet (opcode, 20); |
| 840 | imm32 = ARMExpandImm_C (opcode, APSR_C, carry); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 841 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 842 | // if Rd == Ô1111Õ && S == Ô1Õ then SEE SUBS PC, LR and related instructions; |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 843 | if ((Rd == 15) && setflags) |
| 844 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Caroline Tice | 89c6d58 | 2011-03-29 19:53:44 +0000 | [diff] [blame] | 845 | |
| 846 | break; |
| 847 | |
| 848 | case eEncodingA2: |
| 849 | { |
| 850 | // d = UInt(Rd); setflags = FALSE; imm32 = ZeroExtend(imm4:imm12, 32); |
| 851 | Rd = Bits32 (opcode, 15, 12); |
| 852 | setflags = false; |
| 853 | uint32_t imm4 = Bits32 (opcode, 19, 16); |
| 854 | uint32_t imm12 = Bits32 (opcode, 11, 0); |
| 855 | imm32 = (imm4 << 12) | imm12; |
| 856 | |
| 857 | // if d == 15 then UNPREDICTABLE; |
| 858 | if (Rd == 15) |
| 859 | return false; |
| 860 | } |
| 861 | break; |
| 862 | |
| 863 | default: |
Johnny Chen | 9798cfc | 2011-02-14 23:33:58 +0000 | [diff] [blame] | 864 | return false; |
Johnny Chen | 357c30f | 2011-02-14 22:04:25 +0000 | [diff] [blame] | 865 | } |
| 866 | uint32_t result = imm32; |
| 867 | |
| 868 | // The context specifies that an immediate is to be moved into Rd. |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 869 | EmulateInstruction::Context context; |
| 870 | context.type = EmulateInstruction::eContextImmediate; |
| 871 | context.SetNoArgs (); |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 872 | |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 873 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 874 | return false; |
Johnny Chen | 357c30f | 2011-02-14 22:04:25 +0000 | [diff] [blame] | 875 | } |
| 876 | return true; |
| 877 | } |
| 878 | |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 879 | // MUL multiplies two register values. The least significant 32 bits of the result are written to the destination |
| 880 | // register. These 32 bits do not depend on whether the source register values are considered to be signed values or |
| 881 | // unsigned values. |
| 882 | // |
| 883 | // Optionally, it can update the condition flags based on the result. In the Thumb instruction set, this option is |
| 884 | // limited to only a few forms of the instruction. |
| 885 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 886 | EmulateInstructionARM::EmulateMUL (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 887 | { |
| 888 | #if 0 |
| 889 | if ConditionPassed() then |
| 890 | EncodingSpecificOperations(); |
| 891 | operand1 = SInt(R[n]); // operand1 = UInt(R[n]) produces the same final results |
| 892 | operand2 = SInt(R[m]); // operand2 = UInt(R[m]) produces the same final results |
| 893 | result = operand1 * operand2; |
| 894 | R[d] = result<31:0>; |
| 895 | if setflags then |
| 896 | APSR.N = result<31>; |
| 897 | APSR.Z = IsZeroBit(result); |
| 898 | if ArchVersion() == 4 then |
| 899 | APSR.C = bit UNKNOWN; |
| 900 | // else APSR.C unchanged |
| 901 | // APSR.V always unchanged |
| 902 | #endif |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 903 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 904 | if (ConditionPassed(opcode)) |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 905 | { |
| 906 | uint32_t d; |
| 907 | uint32_t n; |
| 908 | uint32_t m; |
| 909 | bool setflags; |
| 910 | |
| 911 | // EncodingSpecificOperations(); |
| 912 | switch (encoding) |
| 913 | { |
| 914 | case eEncodingT1: |
| 915 | // d = UInt(Rdm); n = UInt(Rn); m = UInt(Rdm); setflags = !InITBlock(); |
| 916 | d = Bits32 (opcode, 2, 0); |
| 917 | n = Bits32 (opcode, 5, 3); |
| 918 | m = Bits32 (opcode, 2, 0); |
| 919 | setflags = !InITBlock(); |
| 920 | |
| 921 | // if ArchVersion() < 6 && d == n then UNPREDICTABLE; |
| 922 | if ((ArchVersion() < ARMv6) && (d == n)) |
| 923 | return false; |
| 924 | |
| 925 | break; |
| 926 | |
| 927 | case eEncodingT2: |
| 928 | // d = UInt(Rd); n = UInt(Rn); m = UInt(Rm); setflags = FALSE; |
| 929 | d = Bits32 (opcode, 11, 8); |
| 930 | n = Bits32 (opcode, 19, 16); |
| 931 | m = Bits32 (opcode, 3, 0); |
| 932 | setflags = false; |
| 933 | |
| 934 | // if BadReg(d) || BadReg(n) || BadReg(m) then UNPREDICTABLE; |
| 935 | if (BadReg (d) || BadReg (n) || BadReg (m)) |
| 936 | return false; |
| 937 | |
| 938 | break; |
| 939 | |
| 940 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 941 | // d = UInt(Rd); n = UInt(Rn); m = UInt(Rm); setflags = (S == '1'); |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 942 | d = Bits32 (opcode, 19, 16); |
| 943 | n = Bits32 (opcode, 3, 0); |
| 944 | m = Bits32 (opcode, 11, 8); |
| 945 | setflags = BitIsSet (opcode, 20); |
| 946 | |
| 947 | // if d == 15 || n == 15 || m == 15 then UNPREDICTABLE; |
| 948 | if ((d == 15) || (n == 15) || (m == 15)) |
| 949 | return false; |
| 950 | |
| 951 | // if ArchVersion() < 6 && d == n then UNPREDICTABLE; |
| 952 | if ((ArchVersion() < ARMv6) && (d == n)) |
| 953 | return false; |
| 954 | |
| 955 | break; |
| 956 | |
| 957 | default: |
| 958 | return false; |
| 959 | } |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 960 | |
| 961 | bool success = false; |
| 962 | |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 963 | // operand1 = SInt(R[n]); // operand1 = UInt(R[n]) produces the same final results |
| 964 | uint64_t operand1 = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 965 | if (!success) |
| 966 | return false; |
| 967 | |
| 968 | // operand2 = SInt(R[m]); // operand2 = UInt(R[m]) produces the same final results |
| 969 | uint64_t operand2 = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 970 | if (!success) |
| 971 | return false; |
| 972 | |
| 973 | // result = operand1 * operand2; |
| 974 | uint64_t result = operand1 * operand2; |
| 975 | |
| 976 | // R[d] = result<31:0>; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 977 | RegisterInfo op1_reg; |
| 978 | RegisterInfo op2_reg; |
| 979 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, op1_reg); |
| 980 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + m, op2_reg); |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 981 | |
| 982 | EmulateInstruction::Context context; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 983 | context.type = eContextArithmetic; |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 984 | context.SetRegisterRegisterOperands (op1_reg, op2_reg); |
| 985 | |
| 986 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + d, (0x0000ffff & result))) |
| 987 | return false; |
| 988 | |
| 989 | // if setflags then |
| 990 | if (setflags) |
| 991 | { |
| 992 | // APSR.N = result<31>; |
| 993 | // APSR.Z = IsZeroBit(result); |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 994 | m_new_inst_cpsr = m_opcode_cpsr; |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 995 | SetBit32 (m_new_inst_cpsr, CPSR_N_POS, Bit32 (result, 31)); |
| 996 | SetBit32 (m_new_inst_cpsr, CPSR_Z_POS, result == 0 ? 1 : 0); |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 997 | if (m_new_inst_cpsr != m_opcode_cpsr) |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 998 | { |
| 999 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FLAGS, m_new_inst_cpsr)) |
| 1000 | return false; |
| 1001 | } |
| 1002 | |
| 1003 | // if ArchVersion() == 4 then |
| 1004 | // APSR.C = bit UNKNOWN; |
| 1005 | } |
| 1006 | } |
| 1007 | return true; |
| 1008 | } |
| 1009 | |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1010 | // Bitwise NOT (immediate) writes the bitwise inverse of an immediate value to the destination register. |
| 1011 | // It can optionally update the condition flags based on the value. |
Johnny Chen | 28070c3 | 2011-02-12 01:27:26 +0000 | [diff] [blame] | 1012 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1013 | EmulateInstructionARM::EmulateMVNImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 28070c3 | 2011-02-12 01:27:26 +0000 | [diff] [blame] | 1014 | { |
| 1015 | #if 0 |
| 1016 | // ARM pseudo code... |
| 1017 | if (ConditionPassed()) |
| 1018 | { |
| 1019 | EncodingSpecificOperations(); |
| 1020 | result = NOT(imm32); |
| 1021 | if d == 15 then // Can only occur for ARM encoding |
| 1022 | ALUWritePC(result); // setflags is always FALSE here |
| 1023 | else |
| 1024 | R[d] = result; |
| 1025 | if setflags then |
| 1026 | APSR.N = result<31>; |
| 1027 | APSR.Z = IsZeroBit(result); |
| 1028 | APSR.C = carry; |
| 1029 | // APSR.V unchanged |
| 1030 | } |
| 1031 | #endif |
Johnny Chen | 33bf6ab | 2011-02-14 20:39:01 +0000 | [diff] [blame] | 1032 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1033 | if (ConditionPassed(opcode)) |
Johnny Chen | 33bf6ab | 2011-02-14 20:39:01 +0000 | [diff] [blame] | 1034 | { |
| 1035 | uint32_t Rd; // the destination register |
Johnny Chen | 357c30f | 2011-02-14 22:04:25 +0000 | [diff] [blame] | 1036 | uint32_t imm32; // the output after ThumbExpandImm_C or ARMExpandImm_C |
| 1037 | uint32_t carry; // the carry bit after ThumbExpandImm_C or ARMExpandImm_C |
Johnny Chen | 33bf6ab | 2011-02-14 20:39:01 +0000 | [diff] [blame] | 1038 | bool setflags; |
| 1039 | switch (encoding) { |
| 1040 | case eEncodingT1: |
| 1041 | Rd = Bits32(opcode, 11, 8); |
Johnny Chen | 33bf6ab | 2011-02-14 20:39:01 +0000 | [diff] [blame] | 1042 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1043 | imm32 = ThumbExpandImm_C(opcode, APSR_C, carry); |
Johnny Chen | 33bf6ab | 2011-02-14 20:39:01 +0000 | [diff] [blame] | 1044 | break; |
| 1045 | case eEncodingA1: |
| 1046 | Rd = Bits32(opcode, 15, 12); |
Johnny Chen | 33bf6ab | 2011-02-14 20:39:01 +0000 | [diff] [blame] | 1047 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1048 | imm32 = ARMExpandImm_C(opcode, APSR_C, carry); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 1049 | |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1050 | // if Rd == '1111' && S == '1' then SEE SUBS PC, LR and related instructions; |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1051 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 1052 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 33bf6ab | 2011-02-14 20:39:01 +0000 | [diff] [blame] | 1053 | break; |
| 1054 | default: |
| 1055 | return false; |
| 1056 | } |
| 1057 | uint32_t result = ~imm32; |
| 1058 | |
| 1059 | // The context specifies that an immediate is to be moved into Rd. |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1060 | EmulateInstruction::Context context; |
| 1061 | context.type = EmulateInstruction::eContextImmediate; |
| 1062 | context.SetNoArgs (); |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 1063 | |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 1064 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 1065 | return false; |
Johnny Chen | 33bf6ab | 2011-02-14 20:39:01 +0000 | [diff] [blame] | 1066 | } |
| 1067 | return true; |
Johnny Chen | 28070c3 | 2011-02-12 01:27:26 +0000 | [diff] [blame] | 1068 | } |
| 1069 | |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1070 | // Bitwise NOT (register) writes the bitwise inverse of a register value to the destination register. |
| 1071 | // It can optionally update the condition flags based on the result. |
| 1072 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1073 | EmulateInstructionARM::EmulateMVNReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1074 | { |
| 1075 | #if 0 |
| 1076 | // ARM pseudo code... |
| 1077 | if (ConditionPassed()) |
| 1078 | { |
| 1079 | EncodingSpecificOperations(); |
| 1080 | (shifted, carry) = Shift_C(R[m], shift_t, shift_n, APSR.C); |
| 1081 | result = NOT(shifted); |
| 1082 | if d == 15 then // Can only occur for ARM encoding |
| 1083 | ALUWritePC(result); // setflags is always FALSE here |
| 1084 | else |
| 1085 | R[d] = result; |
| 1086 | if setflags then |
| 1087 | APSR.N = result<31>; |
| 1088 | APSR.Z = IsZeroBit(result); |
| 1089 | APSR.C = carry; |
| 1090 | // APSR.V unchanged |
| 1091 | } |
| 1092 | #endif |
| 1093 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1094 | if (ConditionPassed(opcode)) |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1095 | { |
| 1096 | uint32_t Rm; // the source register |
| 1097 | uint32_t Rd; // the destination register |
| 1098 | ARM_ShifterType shift_t; |
| 1099 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 1100 | bool setflags; |
| 1101 | uint32_t carry; // the carry bit after the shift operation |
| 1102 | switch (encoding) { |
| 1103 | case eEncodingT1: |
| 1104 | Rd = Bits32(opcode, 2, 0); |
| 1105 | Rm = Bits32(opcode, 5, 3); |
| 1106 | setflags = !InITBlock(); |
| 1107 | shift_t = SRType_LSL; |
| 1108 | shift_n = 0; |
| 1109 | if (InITBlock()) |
| 1110 | return false; |
| 1111 | break; |
| 1112 | case eEncodingT2: |
| 1113 | Rd = Bits32(opcode, 11, 8); |
| 1114 | Rm = Bits32(opcode, 3, 0); |
| 1115 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 1116 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1117 | // if (BadReg(d) || BadReg(m)) then UNPREDICTABLE; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 1118 | if (BadReg(Rd) || BadReg(Rm)) |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1119 | return false; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 1120 | break; |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1121 | case eEncodingA1: |
| 1122 | Rd = Bits32(opcode, 15, 12); |
| 1123 | Rm = Bits32(opcode, 3, 0); |
| 1124 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 1125 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1126 | break; |
| 1127 | default: |
| 1128 | return false; |
| 1129 | } |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1130 | bool success = false; |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1131 | uint32_t value = ReadCoreReg(Rm, &success); |
| 1132 | if (!success) |
| 1133 | return false; |
| 1134 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 1135 | uint32_t shifted = Shift_C(value, shift_t, shift_n, APSR_C, carry, &success); |
| 1136 | if (!success) |
| 1137 | return false; |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1138 | uint32_t result = ~shifted; |
| 1139 | |
| 1140 | // The context specifies that an immediate is to be moved into Rd. |
| 1141 | EmulateInstruction::Context context; |
| 1142 | context.type = EmulateInstruction::eContextImmediate; |
| 1143 | context.SetNoArgs (); |
| 1144 | |
| 1145 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
| 1146 | return false; |
| 1147 | } |
| 1148 | return true; |
| 1149 | } |
| 1150 | |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1151 | // PC relative immediate load into register, possibly followed by ADD (SP plus register). |
| 1152 | // LDR (literal) |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1153 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1154 | EmulateInstructionARM::EmulateLDRRtPCRelative (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1155 | { |
| 1156 | #if 0 |
| 1157 | // ARM pseudo code... |
| 1158 | if (ConditionPassed()) |
| 1159 | { |
| 1160 | EncodingSpecificOperations(); NullCheckIfThumbEE(15); |
| 1161 | base = Align(PC,4); |
| 1162 | address = if add then (base + imm32) else (base - imm32); |
| 1163 | data = MemU[address,4]; |
| 1164 | if t == 15 then |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1165 | if address<1:0> == '00' then LoadWritePC(data); else UNPREDICTABLE; |
| 1166 | elsif UnalignedSupport() || address<1:0> = '00' then |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1167 | R[t] = data; |
| 1168 | else // Can only apply before ARMv7 |
| 1169 | if CurrentInstrSet() == InstrSet_ARM then |
| 1170 | R[t] = ROR(data, 8*UInt(address<1:0>)); |
| 1171 | else |
| 1172 | R[t] = bits(32) UNKNOWN; |
| 1173 | } |
| 1174 | #endif |
| 1175 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1176 | if (ConditionPassed(opcode)) |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1177 | { |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1178 | bool success = false; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1179 | const uint32_t pc = ReadCoreReg(PC_REG, &success); |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1180 | if (!success) |
| 1181 | return false; |
Johnny Chen | 809742e | 2011-01-28 00:32:27 +0000 | [diff] [blame] | 1182 | |
| 1183 | // PC relative immediate load context |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1184 | EmulateInstruction::Context context; |
| 1185 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 1186 | RegisterInfo pc_reg; |
| 1187 | GetRegisterInfo (eRegisterKindDWARF, dwarf_pc, pc_reg); |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1188 | context.SetRegisterPlusOffset (pc_reg, 0); |
| 1189 | |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1190 | uint32_t Rt; // the destination register |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1191 | uint32_t imm32; // immediate offset from the PC |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1192 | bool add; // +imm32 or -imm32? |
| 1193 | addr_t base; // the base address |
| 1194 | addr_t address; // the PC relative address |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1195 | uint32_t data; // the literal data value from the PC relative load |
| 1196 | switch (encoding) { |
| 1197 | case eEncodingT1: |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1198 | Rt = Bits32(opcode, 10, 8); |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1199 | imm32 = Bits32(opcode, 7, 0) << 2; // imm32 = ZeroExtend(imm8:'00', 32); |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1200 | add = true; |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1201 | break; |
| 1202 | case eEncodingT2: |
| 1203 | Rt = Bits32(opcode, 15, 12); |
| 1204 | imm32 = Bits32(opcode, 11, 0) << 2; // imm32 = ZeroExtend(imm12, 32); |
| 1205 | add = BitIsSet(opcode, 23); |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 1206 | if (Rt == 15 && InITBlock() && !LastInITBlock()) |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1207 | return false; |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1208 | break; |
| 1209 | default: |
| 1210 | return false; |
| 1211 | } |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1212 | |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1213 | base = Align(pc, 4); |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1214 | if (add) |
| 1215 | address = base + imm32; |
| 1216 | else |
| 1217 | address = base - imm32; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1218 | |
| 1219 | context.SetRegisterPlusOffset(pc_reg, address - base); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 1220 | data = MemURead(context, address, 4, 0, &success); |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1221 | if (!success) |
Johnny Chen | 809742e | 2011-01-28 00:32:27 +0000 | [diff] [blame] | 1222 | return false; |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1223 | |
| 1224 | if (Rt == 15) |
| 1225 | { |
| 1226 | if (Bits32(address, 1, 0) == 0) |
| 1227 | { |
| 1228 | // In ARMv5T and above, this is an interworking branch. |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 1229 | if (!LoadWritePC(context, data)) |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1230 | return false; |
| 1231 | } |
| 1232 | else |
| 1233 | return false; |
| 1234 | } |
| 1235 | else if (UnalignedSupport() || Bits32(address, 1, 0) == 0) |
| 1236 | { |
| 1237 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + Rt, data)) |
| 1238 | return false; |
| 1239 | } |
| 1240 | else // We don't handle ARM for now. |
| 1241 | return false; |
| 1242 | |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1243 | } |
| 1244 | return true; |
| 1245 | } |
| 1246 | |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1247 | // An add operation to adjust the SP. |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 1248 | // ADD (SP plus immediate) |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1249 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1250 | EmulateInstructionARM::EmulateADDSPImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 1251 | { |
| 1252 | #if 0 |
| 1253 | // ARM pseudo code... |
| 1254 | if (ConditionPassed()) |
| 1255 | { |
| 1256 | EncodingSpecificOperations(); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1257 | (result, carry, overflow) = AddWithCarry(SP, imm32, '0'); |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 1258 | if d == 15 then // Can only occur for ARM encoding |
| 1259 | ALUWritePC(result); // setflags is always FALSE here |
| 1260 | else |
| 1261 | R[d] = result; |
| 1262 | if setflags then |
| 1263 | APSR.N = result<31>; |
| 1264 | APSR.Z = IsZeroBit(result); |
| 1265 | APSR.C = carry; |
| 1266 | APSR.V = overflow; |
| 1267 | } |
| 1268 | #endif |
| 1269 | |
| 1270 | bool success = false; |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 1271 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1272 | if (ConditionPassed(opcode)) |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 1273 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1274 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 1275 | if (!success) |
| 1276 | return false; |
| 1277 | uint32_t imm32; // the immediate operand |
Caroline Tice | e221288 | 2011-03-22 22:38:28 +0000 | [diff] [blame] | 1278 | uint32_t d; |
| 1279 | bool setflags; |
| 1280 | switch (encoding) |
| 1281 | { |
| 1282 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1283 | // d = UInt(Rd); setflags = FALSE; imm32 = ZeroExtend(imm8:'00', 32); |
Caroline Tice | e221288 | 2011-03-22 22:38:28 +0000 | [diff] [blame] | 1284 | d = Bits32 (opcode, 10, 8); |
| 1285 | setflags = false; |
| 1286 | imm32 = (Bits32 (opcode, 7, 0) << 2); |
| 1287 | |
| 1288 | break; |
| 1289 | |
| 1290 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1291 | // d = 13; setflags = FALSE; imm32 = ZeroExtend(imm7:'00', 32); |
Caroline Tice | e221288 | 2011-03-22 22:38:28 +0000 | [diff] [blame] | 1292 | d = 13; |
| 1293 | setflags = false; |
| 1294 | imm32 = ThumbImm7Scaled(opcode); // imm32 = ZeroExtend(imm7:'00', 32) |
| 1295 | |
| 1296 | break; |
| 1297 | |
| 1298 | default: |
| 1299 | return false; |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 1300 | } |
| 1301 | addr_t sp_offset = imm32; |
| 1302 | addr_t addr = sp + sp_offset; // the adjusted stack pointer value |
| 1303 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1304 | EmulateInstruction::Context context; |
| 1305 | context.type = EmulateInstruction::eContextAdjustStackPointer; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 1306 | RegisterInfo sp_reg; |
| 1307 | GetRegisterInfo (eRegisterKindDWARF, dwarf_sp, sp_reg); |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 1308 | context.SetRegisterPlusOffset (sp_reg, sp_offset); |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 1309 | |
Caroline Tice | e221288 | 2011-03-22 22:38:28 +0000 | [diff] [blame] | 1310 | if (d == 15) |
| 1311 | { |
| 1312 | if (!ALUWritePC (context, addr)) |
| 1313 | return false; |
| 1314 | } |
| 1315 | else |
| 1316 | { |
| 1317 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + d, addr)) |
| 1318 | return false; |
| 1319 | } |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 1320 | } |
| 1321 | return true; |
| 1322 | } |
| 1323 | |
| 1324 | // An add operation to adjust the SP. |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1325 | // ADD (SP plus register) |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1326 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1327 | EmulateInstructionARM::EmulateADDSPRm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1328 | { |
| 1329 | #if 0 |
| 1330 | // ARM pseudo code... |
| 1331 | if (ConditionPassed()) |
| 1332 | { |
| 1333 | EncodingSpecificOperations(); |
| 1334 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1335 | (result, carry, overflow) = AddWithCarry(SP, shifted, '0'); |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1336 | if d == 15 then |
| 1337 | ALUWritePC(result); // setflags is always FALSE here |
| 1338 | else |
| 1339 | R[d] = result; |
| 1340 | if setflags then |
| 1341 | APSR.N = result<31>; |
| 1342 | APSR.Z = IsZeroBit(result); |
| 1343 | APSR.C = carry; |
| 1344 | APSR.V = overflow; |
| 1345 | } |
| 1346 | #endif |
| 1347 | |
| 1348 | bool success = false; |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1349 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1350 | if (ConditionPassed(opcode)) |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1351 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1352 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1353 | if (!success) |
| 1354 | return false; |
| 1355 | uint32_t Rm; // the second operand |
| 1356 | switch (encoding) { |
| 1357 | case eEncodingT2: |
| 1358 | Rm = Bits32(opcode, 6, 3); |
| 1359 | break; |
| 1360 | default: |
| 1361 | return false; |
| 1362 | } |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1363 | int32_t reg_value = ReadCoreReg(Rm, &success); |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1364 | if (!success) |
| 1365 | return false; |
| 1366 | |
| 1367 | addr_t addr = (int32_t)sp + reg_value; // the adjusted stack pointer value |
| 1368 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1369 | EmulateInstruction::Context context; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 1370 | context.type = eContextArithmetic; |
| 1371 | RegisterInfo sp_reg; |
| 1372 | GetRegisterInfo (eRegisterKindDWARF, dwarf_sp, sp_reg); |
| 1373 | |
| 1374 | RegisterInfo other_reg; |
| 1375 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + Rm, other_reg); |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 1376 | context.SetRegisterRegisterOperands (sp_reg, other_reg); |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1377 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1378 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP, addr)) |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1379 | return false; |
| 1380 | } |
| 1381 | return true; |
| 1382 | } |
| 1383 | |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1384 | // Branch with Link and Exchange Instruction Sets (immediate) calls a subroutine |
| 1385 | // at a PC-relative address, and changes instruction set from ARM to Thumb, or |
| 1386 | // from Thumb to ARM. |
| 1387 | // BLX (immediate) |
| 1388 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1389 | EmulateInstructionARM::EmulateBLXImmediate (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1390 | { |
| 1391 | #if 0 |
| 1392 | // ARM pseudo code... |
| 1393 | if (ConditionPassed()) |
| 1394 | { |
| 1395 | EncodingSpecificOperations(); |
| 1396 | if CurrentInstrSet() == InstrSet_ARM then |
| 1397 | LR = PC - 4; |
| 1398 | else |
| 1399 | LR = PC<31:1> : '1'; |
| 1400 | if targetInstrSet == InstrSet_ARM then |
| 1401 | targetAddress = Align(PC,4) + imm32; |
| 1402 | else |
| 1403 | targetAddress = PC + imm32; |
| 1404 | SelectInstrSet(targetInstrSet); |
| 1405 | BranchWritePC(targetAddress); |
| 1406 | } |
| 1407 | #endif |
| 1408 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1409 | bool success = true; |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1410 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1411 | if (ConditionPassed(opcode)) |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1412 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1413 | EmulateInstruction::Context context; |
| 1414 | context.type = EmulateInstruction::eContextRelativeBranchImmediate; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1415 | const uint32_t pc = ReadCoreReg(PC_REG, &success); |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1416 | if (!success) |
| 1417 | return false; |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 1418 | addr_t lr; // next instruction address |
| 1419 | addr_t target; // target address |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1420 | int32_t imm32; // PC-relative offset |
| 1421 | switch (encoding) { |
Johnny Chen | d6c13f0 | 2011-02-08 20:36:34 +0000 | [diff] [blame] | 1422 | case eEncodingT1: |
| 1423 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1424 | lr = pc | 1u; // return address |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 1425 | uint32_t S = Bit32(opcode, 26); |
Johnny Chen | d6c13f0 | 2011-02-08 20:36:34 +0000 | [diff] [blame] | 1426 | uint32_t imm10 = Bits32(opcode, 25, 16); |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 1427 | uint32_t J1 = Bit32(opcode, 13); |
| 1428 | uint32_t J2 = Bit32(opcode, 11); |
Johnny Chen | d6c13f0 | 2011-02-08 20:36:34 +0000 | [diff] [blame] | 1429 | uint32_t imm11 = Bits32(opcode, 10, 0); |
| 1430 | uint32_t I1 = !(J1 ^ S); |
| 1431 | uint32_t I2 = !(J2 ^ S); |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 1432 | uint32_t imm25 = (S << 24) | (I1 << 23) | (I2 << 22) | (imm10 << 12) | (imm11 << 1); |
Johnny Chen | d6c13f0 | 2011-02-08 20:36:34 +0000 | [diff] [blame] | 1433 | imm32 = llvm::SignExtend32<25>(imm25); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1434 | target = pc + imm32; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 1435 | context.SetISAAndImmediateSigned (eModeThumb, 4 + imm32); |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 1436 | if (InITBlock() && !LastInITBlock()) |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1437 | return false; |
Johnny Chen | d6c13f0 | 2011-02-08 20:36:34 +0000 | [diff] [blame] | 1438 | break; |
| 1439 | } |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1440 | case eEncodingT2: |
| 1441 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1442 | lr = pc | 1u; // return address |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 1443 | uint32_t S = Bit32(opcode, 26); |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1444 | uint32_t imm10H = Bits32(opcode, 25, 16); |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 1445 | uint32_t J1 = Bit32(opcode, 13); |
| 1446 | uint32_t J2 = Bit32(opcode, 11); |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1447 | uint32_t imm10L = Bits32(opcode, 10, 1); |
| 1448 | uint32_t I1 = !(J1 ^ S); |
| 1449 | uint32_t I2 = !(J2 ^ S); |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 1450 | uint32_t imm25 = (S << 24) | (I1 << 23) | (I2 << 22) | (imm10H << 12) | (imm10L << 2); |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1451 | imm32 = llvm::SignExtend32<25>(imm25); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1452 | target = Align(pc, 4) + imm32; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 1453 | context.SetISAAndImmediateSigned (eModeARM, 4 + imm32); |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 1454 | if (InITBlock() && !LastInITBlock()) |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1455 | return false; |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1456 | break; |
| 1457 | } |
Johnny Chen | c47d0ca | 2011-02-08 18:58:31 +0000 | [diff] [blame] | 1458 | case eEncodingA1: |
Caroline Tice | 2b03ed8 | 2011-03-16 00:06:12 +0000 | [diff] [blame] | 1459 | lr = pc - 4; // return address |
Johnny Chen | c47d0ca | 2011-02-08 18:58:31 +0000 | [diff] [blame] | 1460 | imm32 = llvm::SignExtend32<26>(Bits32(opcode, 23, 0) << 2); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1461 | target = Align(pc, 4) + imm32; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 1462 | context.SetISAAndImmediateSigned (eModeARM, 8 + imm32); |
Johnny Chen | c47d0ca | 2011-02-08 18:58:31 +0000 | [diff] [blame] | 1463 | break; |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1464 | case eEncodingA2: |
Caroline Tice | 2b03ed8 | 2011-03-16 00:06:12 +0000 | [diff] [blame] | 1465 | lr = pc - 4; // return address |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1466 | imm32 = llvm::SignExtend32<26>(Bits32(opcode, 23, 0) << 2 | Bits32(opcode, 24, 24) << 1); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1467 | target = pc + imm32; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 1468 | context.SetISAAndImmediateSigned (eModeThumb, 8 + imm32); |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1469 | break; |
| 1470 | default: |
| 1471 | return false; |
| 1472 | } |
| 1473 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_RA, lr)) |
| 1474 | return false; |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 1475 | if (!BranchWritePC(context, target)) |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1476 | return false; |
| 1477 | } |
| 1478 | return true; |
| 1479 | } |
| 1480 | |
| 1481 | // Branch with Link and Exchange (register) calls a subroutine at an address and |
| 1482 | // instruction set specified by a register. |
| 1483 | // BLX (register) |
| 1484 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1485 | EmulateInstructionARM::EmulateBLXRm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1486 | { |
| 1487 | #if 0 |
| 1488 | // ARM pseudo code... |
| 1489 | if (ConditionPassed()) |
| 1490 | { |
| 1491 | EncodingSpecificOperations(); |
| 1492 | target = R[m]; |
| 1493 | if CurrentInstrSet() == InstrSet_ARM then |
| 1494 | next_instr_addr = PC - 4; |
| 1495 | LR = next_instr_addr; |
| 1496 | else |
| 1497 | next_instr_addr = PC - 2; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1498 | LR = next_instr_addr<31:1> : '1'; |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1499 | BXWritePC(target); |
| 1500 | } |
| 1501 | #endif |
| 1502 | |
| 1503 | bool success = false; |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1504 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1505 | if (ConditionPassed(opcode)) |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1506 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1507 | EmulateInstruction::Context context; |
| 1508 | context.type = EmulateInstruction::eContextAbsoluteBranchRegister; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1509 | const uint32_t pc = ReadCoreReg(PC_REG, &success); |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1510 | addr_t lr; // next instruction address |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1511 | if (!success) |
| 1512 | return false; |
| 1513 | uint32_t Rm; // the register with the target address |
| 1514 | switch (encoding) { |
| 1515 | case eEncodingT1: |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1516 | lr = (pc - 2) | 1u; // return address |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1517 | Rm = Bits32(opcode, 6, 3); |
| 1518 | // if m == 15 then UNPREDICTABLE; |
| 1519 | if (Rm == 15) |
| 1520 | return false; |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 1521 | if (InITBlock() && !LastInITBlock()) |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1522 | return false; |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1523 | break; |
| 1524 | case eEncodingA1: |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1525 | lr = pc - 4; // return address |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1526 | Rm = Bits32(opcode, 3, 0); |
| 1527 | // if m == 15 then UNPREDICTABLE; |
| 1528 | if (Rm == 15) |
| 1529 | return false; |
Johnny Chen | b77be41 | 2011-02-04 00:40:18 +0000 | [diff] [blame] | 1530 | break; |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1531 | default: |
| 1532 | return false; |
| 1533 | } |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1534 | addr_t target = ReadCoreReg (Rm, &success); |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1535 | if (!success) |
| 1536 | return false; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 1537 | RegisterInfo dwarf_reg; |
| 1538 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + Rm, dwarf_reg); |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1539 | context.SetRegister (dwarf_reg); |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1540 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_RA, lr)) |
| 1541 | return false; |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 1542 | if (!BXWritePC(context, target)) |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1543 | return false; |
| 1544 | } |
| 1545 | return true; |
| 1546 | } |
| 1547 | |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1548 | // Branch and Exchange causes a branch to an address and instruction set specified by a register. |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1549 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1550 | EmulateInstructionARM::EmulateBXRm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1551 | { |
| 1552 | #if 0 |
| 1553 | // ARM pseudo code... |
| 1554 | if (ConditionPassed()) |
| 1555 | { |
| 1556 | EncodingSpecificOperations(); |
| 1557 | BXWritePC(R[m]); |
| 1558 | } |
| 1559 | #endif |
| 1560 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1561 | if (ConditionPassed(opcode)) |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1562 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1563 | EmulateInstruction::Context context; |
| 1564 | context.type = EmulateInstruction::eContextAbsoluteBranchRegister; |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1565 | uint32_t Rm; // the register with the target address |
| 1566 | switch (encoding) { |
| 1567 | case eEncodingT1: |
| 1568 | Rm = Bits32(opcode, 6, 3); |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 1569 | if (InITBlock() && !LastInITBlock()) |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1570 | return false; |
| 1571 | break; |
| 1572 | case eEncodingA1: |
| 1573 | Rm = Bits32(opcode, 3, 0); |
| 1574 | break; |
| 1575 | default: |
| 1576 | return false; |
| 1577 | } |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1578 | bool success = false; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1579 | addr_t target = ReadCoreReg (Rm, &success); |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1580 | if (!success) |
| 1581 | return false; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 1582 | |
| 1583 | RegisterInfo dwarf_reg; |
| 1584 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + Rm, dwarf_reg); |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 1585 | context.SetRegister (dwarf_reg); |
| 1586 | if (!BXWritePC(context, target)) |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1587 | return false; |
| 1588 | } |
| 1589 | return true; |
| 1590 | } |
| 1591 | |
Johnny Chen | 59e6ab7 | 2011-02-24 21:01:20 +0000 | [diff] [blame] | 1592 | // Branch and Exchange Jazelle attempts to change to Jazelle state. If the attempt fails, it branches to an |
| 1593 | // address and instruction set specified by a register as though it were a BX instruction. |
| 1594 | // |
| 1595 | // TODO: Emulate Jazelle architecture? |
| 1596 | // We currently assume that switching to Jazelle state fails, thus treating BXJ as a BX operation. |
| 1597 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1598 | EmulateInstructionARM::EmulateBXJRm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 59e6ab7 | 2011-02-24 21:01:20 +0000 | [diff] [blame] | 1599 | { |
| 1600 | #if 0 |
| 1601 | // ARM pseudo code... |
| 1602 | if (ConditionPassed()) |
| 1603 | { |
| 1604 | EncodingSpecificOperations(); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1605 | if JMCR.JE == '0' || CurrentInstrSet() == InstrSet_ThumbEE then |
Johnny Chen | 59e6ab7 | 2011-02-24 21:01:20 +0000 | [diff] [blame] | 1606 | BXWritePC(R[m]); |
| 1607 | else |
| 1608 | if JazelleAcceptsExecution() then |
| 1609 | SwitchToJazelleExecution(); |
| 1610 | else |
| 1611 | SUBARCHITECTURE_DEFINED handler call; |
| 1612 | } |
| 1613 | #endif |
| 1614 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1615 | if (ConditionPassed(opcode)) |
Johnny Chen | 59e6ab7 | 2011-02-24 21:01:20 +0000 | [diff] [blame] | 1616 | { |
| 1617 | EmulateInstruction::Context context; |
| 1618 | context.type = EmulateInstruction::eContextAbsoluteBranchRegister; |
| 1619 | uint32_t Rm; // the register with the target address |
| 1620 | switch (encoding) { |
| 1621 | case eEncodingT1: |
| 1622 | Rm = Bits32(opcode, 19, 16); |
| 1623 | if (BadReg(Rm)) |
| 1624 | return false; |
| 1625 | if (InITBlock() && !LastInITBlock()) |
| 1626 | return false; |
| 1627 | break; |
| 1628 | case eEncodingA1: |
| 1629 | Rm = Bits32(opcode, 3, 0); |
| 1630 | if (Rm == 15) |
| 1631 | return false; |
| 1632 | break; |
| 1633 | default: |
| 1634 | return false; |
| 1635 | } |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1636 | bool success = false; |
Johnny Chen | 59e6ab7 | 2011-02-24 21:01:20 +0000 | [diff] [blame] | 1637 | addr_t target = ReadCoreReg (Rm, &success); |
| 1638 | if (!success) |
| 1639 | return false; |
| 1640 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 1641 | RegisterInfo dwarf_reg; |
| 1642 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + Rm, dwarf_reg); |
Johnny Chen | 59e6ab7 | 2011-02-24 21:01:20 +0000 | [diff] [blame] | 1643 | context.SetRegister (dwarf_reg); |
| 1644 | if (!BXWritePC(context, target)) |
| 1645 | return false; |
| 1646 | } |
| 1647 | return true; |
| 1648 | } |
| 1649 | |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1650 | // Set r7 to point to some ip offset. |
| 1651 | // SUB (immediate) |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1652 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1653 | EmulateInstructionARM::EmulateSUBR7IPImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1654 | { |
| 1655 | #if 0 |
| 1656 | // ARM pseudo code... |
| 1657 | if (ConditionPassed()) |
| 1658 | { |
| 1659 | EncodingSpecificOperations(); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1660 | (result, carry, overflow) = AddWithCarry(SP, NOT(imm32), '1'); |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1661 | if d == 15 then // Can only occur for ARM encoding |
| 1662 | ALUWritePC(result); // setflags is always FALSE here |
| 1663 | else |
| 1664 | R[d] = result; |
| 1665 | if setflags then |
| 1666 | APSR.N = result<31>; |
| 1667 | APSR.Z = IsZeroBit(result); |
| 1668 | APSR.C = carry; |
| 1669 | APSR.V = overflow; |
| 1670 | } |
| 1671 | #endif |
| 1672 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1673 | if (ConditionPassed(opcode)) |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1674 | { |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1675 | bool success = false; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1676 | const addr_t ip = ReadCoreReg (12, &success); |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1677 | if (!success) |
| 1678 | return false; |
| 1679 | uint32_t imm32; |
| 1680 | switch (encoding) { |
| 1681 | case eEncodingA1: |
| 1682 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
| 1683 | break; |
| 1684 | default: |
| 1685 | return false; |
| 1686 | } |
| 1687 | addr_t ip_offset = imm32; |
| 1688 | addr_t addr = ip - ip_offset; // the adjusted ip value |
| 1689 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1690 | EmulateInstruction::Context context; |
| 1691 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 1692 | RegisterInfo dwarf_reg; |
| 1693 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r12, dwarf_reg); |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1694 | context.SetRegisterPlusOffset (dwarf_reg, -ip_offset); |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1695 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1696 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r7, addr)) |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1697 | return false; |
| 1698 | } |
| 1699 | return true; |
| 1700 | } |
| 1701 | |
| 1702 | // Set ip to point to some stack offset. |
| 1703 | // SUB (SP minus immediate) |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1704 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1705 | EmulateInstructionARM::EmulateSUBIPSPImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1706 | { |
| 1707 | #if 0 |
| 1708 | // ARM pseudo code... |
| 1709 | if (ConditionPassed()) |
| 1710 | { |
| 1711 | EncodingSpecificOperations(); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1712 | (result, carry, overflow) = AddWithCarry(SP, NOT(imm32), '1'); |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1713 | if d == 15 then // Can only occur for ARM encoding |
| 1714 | ALUWritePC(result); // setflags is always FALSE here |
| 1715 | else |
| 1716 | R[d] = result; |
| 1717 | if setflags then |
| 1718 | APSR.N = result<31>; |
| 1719 | APSR.Z = IsZeroBit(result); |
| 1720 | APSR.C = carry; |
| 1721 | APSR.V = overflow; |
| 1722 | } |
| 1723 | #endif |
| 1724 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1725 | if (ConditionPassed(opcode)) |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1726 | { |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1727 | bool success = false; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1728 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1729 | if (!success) |
| 1730 | return false; |
| 1731 | uint32_t imm32; |
| 1732 | switch (encoding) { |
| 1733 | case eEncodingA1: |
| 1734 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
| 1735 | break; |
| 1736 | default: |
| 1737 | return false; |
| 1738 | } |
| 1739 | addr_t sp_offset = imm32; |
| 1740 | addr_t addr = sp - sp_offset; // the adjusted stack pointer value |
| 1741 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1742 | EmulateInstruction::Context context; |
| 1743 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 1744 | RegisterInfo dwarf_reg; |
| 1745 | GetRegisterInfo (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP, dwarf_reg); |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1746 | context.SetRegisterPlusOffset (dwarf_reg, -sp_offset); |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1747 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1748 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r12, addr)) |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1749 | return false; |
| 1750 | } |
| 1751 | return true; |
| 1752 | } |
| 1753 | |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1754 | // This instruction subtracts an immediate value from the SP value, and writes |
| 1755 | // the result to the destination register. |
| 1756 | // |
| 1757 | // If Rd == 13 => A sub operation to adjust the SP -- allocate space for local storage. |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1758 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1759 | EmulateInstructionARM::EmulateSUBSPImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 4c0e0bc | 2011-01-25 22:45:28 +0000 | [diff] [blame] | 1760 | { |
| 1761 | #if 0 |
| 1762 | // ARM pseudo code... |
| 1763 | if (ConditionPassed()) |
| 1764 | { |
| 1765 | EncodingSpecificOperations(); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1766 | (result, carry, overflow) = AddWithCarry(SP, NOT(imm32), '1'); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 1767 | if d == 15 then // Can only occur for ARM encoding |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1768 | ALUWritePC(result); // setflags is always FALSE here |
Johnny Chen | 4c0e0bc | 2011-01-25 22:45:28 +0000 | [diff] [blame] | 1769 | else |
| 1770 | R[d] = result; |
| 1771 | if setflags then |
| 1772 | APSR.N = result<31>; |
| 1773 | APSR.Z = IsZeroBit(result); |
| 1774 | APSR.C = carry; |
| 1775 | APSR.V = overflow; |
| 1776 | } |
| 1777 | #endif |
| 1778 | |
| 1779 | bool success = false; |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1780 | if (ConditionPassed(opcode)) |
Johnny Chen | 4c0e0bc | 2011-01-25 22:45:28 +0000 | [diff] [blame] | 1781 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1782 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | 4c0e0bc | 2011-01-25 22:45:28 +0000 | [diff] [blame] | 1783 | if (!success) |
| 1784 | return false; |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1785 | |
| 1786 | uint32_t Rd; |
| 1787 | bool setflags; |
Johnny Chen | 4c0e0bc | 2011-01-25 22:45:28 +0000 | [diff] [blame] | 1788 | uint32_t imm32; |
| 1789 | switch (encoding) { |
Johnny Chen | e445502 | 2011-01-26 00:08:59 +0000 | [diff] [blame] | 1790 | case eEncodingT1: |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1791 | Rd = 13; |
| 1792 | setflags = false; |
Johnny Chen | a695f95 | 2011-02-23 21:24:25 +0000 | [diff] [blame] | 1793 | imm32 = ThumbImm7Scaled(opcode); // imm32 = ZeroExtend(imm7:'00', 32) |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 1794 | break; |
Johnny Chen | 60c0d62 | 2011-01-25 23:49:39 +0000 | [diff] [blame] | 1795 | case eEncodingT2: |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1796 | Rd = Bits32(opcode, 11, 8); |
| 1797 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 60c0d62 | 2011-01-25 23:49:39 +0000 | [diff] [blame] | 1798 | imm32 = ThumbExpandImm(opcode); // imm32 = ThumbExpandImm(i:imm3:imm8) |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1799 | if (Rd == 15 && setflags) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1800 | return EmulateCMPImm(opcode, eEncodingT2); |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1801 | if (Rd == 15 && !setflags) |
| 1802 | return false; |
Johnny Chen | 60c0d62 | 2011-01-25 23:49:39 +0000 | [diff] [blame] | 1803 | break; |
| 1804 | case eEncodingT3: |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1805 | Rd = Bits32(opcode, 11, 8); |
| 1806 | setflags = false; |
Johnny Chen | 60c0d62 | 2011-01-25 23:49:39 +0000 | [diff] [blame] | 1807 | imm32 = ThumbImm12(opcode); // imm32 = ZeroExtend(i:imm3:imm8, 32) |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 1808 | if (Rd == 15) |
| 1809 | return false; |
Johnny Chen | 60c0d62 | 2011-01-25 23:49:39 +0000 | [diff] [blame] | 1810 | break; |
Johnny Chen | 4c0e0bc | 2011-01-25 22:45:28 +0000 | [diff] [blame] | 1811 | case eEncodingA1: |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1812 | Rd = Bits32(opcode, 15, 12); |
| 1813 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 60c0d62 | 2011-01-25 23:49:39 +0000 | [diff] [blame] | 1814 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 1815 | |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 1816 | // if Rd == '1111' && S == '1' then SEE SUBS PC, LR and related instructions; |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 1817 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 1818 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 4c0e0bc | 2011-01-25 22:45:28 +0000 | [diff] [blame] | 1819 | break; |
| 1820 | default: |
| 1821 | return false; |
| 1822 | } |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1823 | AddWithCarryResult res = AddWithCarry(sp, ~imm32, 1); |
| 1824 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1825 | EmulateInstruction::Context context; |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1826 | if (Rd == 13) |
| 1827 | { |
Caroline Tice | 2b03ed8 | 2011-03-16 00:06:12 +0000 | [diff] [blame] | 1828 | uint64_t imm64 = imm32; // Need to expand it to 64 bits before attempting to negate it, or the wrong |
| 1829 | // value gets passed down to context.SetImmediateSigned. |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1830 | context.type = EmulateInstruction::eContextAdjustStackPointer; |
Caroline Tice | 2b03ed8 | 2011-03-16 00:06:12 +0000 | [diff] [blame] | 1831 | context.SetImmediateSigned (-imm64); // the stack pointer offset |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1832 | } |
| 1833 | else |
| 1834 | { |
| 1835 | context.type = EmulateInstruction::eContextImmediate; |
| 1836 | context.SetNoArgs (); |
| 1837 | } |
| 1838 | |
| 1839 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
Johnny Chen | 4c0e0bc | 2011-01-25 22:45:28 +0000 | [diff] [blame] | 1840 | return false; |
| 1841 | } |
| 1842 | return true; |
| 1843 | } |
| 1844 | |
Johnny Chen | 08c25e8 | 2011-01-31 18:02:28 +0000 | [diff] [blame] | 1845 | // A store operation to the stack that also updates the SP. |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1846 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1847 | EmulateInstructionARM::EmulateSTRRtSP (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1848 | { |
| 1849 | #if 0 |
| 1850 | // ARM pseudo code... |
| 1851 | if (ConditionPassed()) |
| 1852 | { |
| 1853 | EncodingSpecificOperations(); |
| 1854 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 1855 | address = if index then offset_addr else R[n]; |
| 1856 | MemU[address,4] = if t == 15 then PCStoreValue() else R[t]; |
| 1857 | if wback then R[n] = offset_addr; |
| 1858 | } |
| 1859 | #endif |
| 1860 | |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 1861 | bool conditional = false; |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1862 | bool success = false; |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 1863 | if (ConditionPassed(opcode, &conditional)) |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1864 | { |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1865 | const uint32_t addr_byte_size = GetAddressByteSize(); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1866 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1867 | if (!success) |
| 1868 | return false; |
Johnny Chen | 91d9986 | 2011-01-25 19:07:04 +0000 | [diff] [blame] | 1869 | uint32_t Rt; // the source register |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1870 | uint32_t imm12; |
Caroline Tice | 3e40797 | 2011-03-18 19:41:00 +0000 | [diff] [blame] | 1871 | uint32_t Rn; // This function assumes Rn is the SP, but we should verify that. |
| 1872 | |
| 1873 | bool index; |
| 1874 | bool add; |
| 1875 | bool wback; |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1876 | switch (encoding) { |
| 1877 | case eEncodingA1: |
Johnny Chen | 108d5aa | 2011-01-26 01:00:55 +0000 | [diff] [blame] | 1878 | Rt = Bits32(opcode, 15, 12); |
| 1879 | imm12 = Bits32(opcode, 11, 0); |
Caroline Tice | 3e40797 | 2011-03-18 19:41:00 +0000 | [diff] [blame] | 1880 | Rn = Bits32 (opcode, 19, 16); |
| 1881 | |
| 1882 | if (Rn != 13) // 13 is the SP reg on ARM. Verify that Rn == SP. |
| 1883 | return false; |
| 1884 | |
| 1885 | index = BitIsSet (opcode, 24); |
| 1886 | add = BitIsSet (opcode, 23); |
| 1887 | wback = (BitIsClear (opcode, 24) || BitIsSet (opcode, 21)); |
| 1888 | |
| 1889 | if (wback && ((Rn == 15) || (Rn == Rt))) |
| 1890 | return false; |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1891 | break; |
| 1892 | default: |
| 1893 | return false; |
| 1894 | } |
Caroline Tice | 3e40797 | 2011-03-18 19:41:00 +0000 | [diff] [blame] | 1895 | addr_t offset_addr; |
| 1896 | if (add) |
| 1897 | offset_addr = sp + imm12; |
| 1898 | else |
| 1899 | offset_addr = sp - imm12; |
| 1900 | |
| 1901 | addr_t addr; |
| 1902 | if (index) |
| 1903 | addr = offset_addr; |
| 1904 | else |
| 1905 | addr = sp; |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1906 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1907 | EmulateInstruction::Context context; |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 1908 | if (conditional) |
| 1909 | context.type = EmulateInstruction::eContextRegisterStore; |
| 1910 | else |
| 1911 | context.type = EmulateInstruction::eContextPushRegisterOnStack; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 1912 | RegisterInfo sp_reg; |
Greg Clayton | b9e8f6e | 2011-05-18 01:58:14 +0000 | [diff] [blame] | 1913 | RegisterInfo dwarf_reg; |
| 1914 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 1915 | GetRegisterInfo (eRegisterKindDWARF, dwarf_sp, sp_reg); |
Greg Clayton | b9e8f6e | 2011-05-18 01:58:14 +0000 | [diff] [blame] | 1916 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + Rt, dwarf_reg); |
| 1917 | context.SetRegisterToRegisterPlusOffset ( dwarf_reg, sp_reg, addr - sp); |
Johnny Chen | 91d9986 | 2011-01-25 19:07:04 +0000 | [diff] [blame] | 1918 | if (Rt != 15) |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1919 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1920 | uint32_t reg_value = ReadCoreReg(Rt, &success); |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1921 | if (!success) |
| 1922 | return false; |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 1923 | if (!MemUWrite (context, addr, reg_value, addr_byte_size)) |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1924 | return false; |
| 1925 | } |
| 1926 | else |
| 1927 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1928 | const uint32_t pc = ReadCoreReg(PC_REG, &success); |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1929 | if (!success) |
| 1930 | return false; |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 1931 | if (!MemUWrite (context, addr, pc, addr_byte_size)) |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1932 | return false; |
| 1933 | } |
| 1934 | |
Caroline Tice | 3e40797 | 2011-03-18 19:41:00 +0000 | [diff] [blame] | 1935 | |
| 1936 | if (wback) |
| 1937 | { |
| 1938 | context.type = EmulateInstruction::eContextAdjustStackPointer; |
| 1939 | context.SetImmediateSigned (addr - sp); |
| 1940 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP, offset_addr)) |
| 1941 | return false; |
| 1942 | } |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1943 | } |
| 1944 | return true; |
| 1945 | } |
| 1946 | |
Johnny Chen | 08c25e8 | 2011-01-31 18:02:28 +0000 | [diff] [blame] | 1947 | // Vector Push stores multiple extension registers to the stack. |
| 1948 | // It also updates SP to point to the start of the stored data. |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1949 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1950 | EmulateInstructionARM::EmulateVPUSH (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1951 | { |
| 1952 | #if 0 |
| 1953 | // ARM pseudo code... |
| 1954 | if (ConditionPassed()) |
| 1955 | { |
| 1956 | EncodingSpecificOperations(); CheckVFPEnabled(TRUE); NullCheckIfThumbEE(13); |
| 1957 | address = SP - imm32; |
| 1958 | SP = SP - imm32; |
| 1959 | if single_regs then |
| 1960 | for r = 0 to regs-1 |
| 1961 | MemA[address,4] = S[d+r]; address = address+4; |
| 1962 | else |
| 1963 | for r = 0 to regs-1 |
| 1964 | // Store as two word-aligned words in the correct order for current endianness. |
| 1965 | MemA[address,4] = if BigEndian() then D[d+r]<63:32> else D[d+r]<31:0>; |
| 1966 | MemA[address+4,4] = if BigEndian() then D[d+r]<31:0> else D[d+r]<63:32>; |
| 1967 | address = address+8; |
| 1968 | } |
| 1969 | #endif |
| 1970 | |
| 1971 | bool success = false; |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 1972 | bool conditional = false; |
| 1973 | if (ConditionPassed(opcode, &conditional)) |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1974 | { |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1975 | const uint32_t addr_byte_size = GetAddressByteSize(); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1976 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1977 | if (!success) |
| 1978 | return false; |
| 1979 | bool single_regs; |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 1980 | uint32_t d; // UInt(D:Vd) or UInt(Vd:D) starting register |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1981 | uint32_t imm32; // stack offset |
| 1982 | uint32_t regs; // number of registers |
| 1983 | switch (encoding) { |
| 1984 | case eEncodingT1: |
| 1985 | case eEncodingA1: |
| 1986 | single_regs = false; |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 1987 | d = Bit32(opcode, 22) << 4 | Bits32(opcode, 15, 12); |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1988 | imm32 = Bits32(opcode, 7, 0) * addr_byte_size; |
| 1989 | // If UInt(imm8) is odd, see "FSTMX". |
| 1990 | regs = Bits32(opcode, 7, 0) / 2; |
| 1991 | // if regs == 0 || regs > 16 || (d+regs) > 32 then UNPREDICTABLE; |
| 1992 | if (regs == 0 || regs > 16 || (d + regs) > 32) |
| 1993 | return false; |
| 1994 | break; |
| 1995 | case eEncodingT2: |
| 1996 | case eEncodingA2: |
| 1997 | single_regs = true; |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 1998 | d = Bits32(opcode, 15, 12) << 1 | Bit32(opcode, 22); |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1999 | imm32 = Bits32(opcode, 7, 0) * addr_byte_size; |
| 2000 | regs = Bits32(opcode, 7, 0); |
| 2001 | // if regs == 0 || regs > 16 || (d+regs) > 32 then UNPREDICTABLE; |
| 2002 | if (regs == 0 || regs > 16 || (d + regs) > 32) |
| 2003 | return false; |
| 2004 | break; |
| 2005 | default: |
| 2006 | return false; |
| 2007 | } |
| 2008 | uint32_t start_reg = single_regs ? dwarf_s0 : dwarf_d0; |
| 2009 | uint32_t reg_byte_size = single_regs ? addr_byte_size : addr_byte_size * 2; |
| 2010 | addr_t sp_offset = imm32; |
| 2011 | addr_t addr = sp - sp_offset; |
| 2012 | uint32_t i; |
| 2013 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2014 | EmulateInstruction::Context context; |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 2015 | if (conditional) |
| 2016 | context.type = EmulateInstruction::eContextRegisterStore; |
| 2017 | else |
| 2018 | context.type = EmulateInstruction::eContextPushRegisterOnStack; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 2019 | RegisterInfo dwarf_reg; |
| 2020 | RegisterInfo sp_reg; |
| 2021 | GetRegisterInfo (eRegisterKindDWARF, dwarf_sp, sp_reg); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 2022 | for (i=0; i<regs; ++i) |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 2023 | { |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 2024 | GetRegisterInfo (eRegisterKindDWARF, start_reg + d + i, dwarf_reg); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 2025 | context.SetRegisterToRegisterPlusOffset ( dwarf_reg, sp_reg, addr - sp); |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 2026 | // uint64_t to accommodate 64-bit registers. |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 2027 | uint64_t reg_value = ReadRegisterUnsigned (&dwarf_reg, 0, &success); |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 2028 | if (!success) |
| 2029 | return false; |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 2030 | if (!MemAWrite (context, addr, reg_value, reg_byte_size)) |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 2031 | return false; |
| 2032 | addr += reg_byte_size; |
| 2033 | } |
| 2034 | |
| 2035 | context.type = EmulateInstruction::eContextAdjustStackPointer; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2036 | context.SetImmediateSigned (-sp_offset); |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 2037 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 2038 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP, sp - sp_offset)) |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 2039 | return false; |
| 2040 | } |
| 2041 | return true; |
| 2042 | } |
| 2043 | |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2044 | // Vector Pop loads multiple extension registers from the stack. |
| 2045 | // It also updates SP to point just above the loaded data. |
| 2046 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2047 | EmulateInstructionARM::EmulateVPOP (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2048 | { |
| 2049 | #if 0 |
| 2050 | // ARM pseudo code... |
| 2051 | if (ConditionPassed()) |
| 2052 | { |
| 2053 | EncodingSpecificOperations(); CheckVFPEnabled(TRUE); NullCheckIfThumbEE(13); |
| 2054 | address = SP; |
| 2055 | SP = SP + imm32; |
| 2056 | if single_regs then |
| 2057 | for r = 0 to regs-1 |
| 2058 | S[d+r] = MemA[address,4]; address = address+4; |
| 2059 | else |
| 2060 | for r = 0 to regs-1 |
| 2061 | word1 = MemA[address,4]; word2 = MemA[address+4,4]; address = address+8; |
| 2062 | // Combine the word-aligned words in the correct order for current endianness. |
| 2063 | D[d+r] = if BigEndian() then word1:word2 else word2:word1; |
| 2064 | } |
| 2065 | #endif |
| 2066 | |
| 2067 | bool success = false; |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 2068 | bool conditional = false; |
| 2069 | if (ConditionPassed(opcode, &conditional)) |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2070 | { |
| 2071 | const uint32_t addr_byte_size = GetAddressByteSize(); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2072 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2073 | if (!success) |
| 2074 | return false; |
| 2075 | bool single_regs; |
| 2076 | uint32_t d; // UInt(D:Vd) or UInt(Vd:D) starting register |
| 2077 | uint32_t imm32; // stack offset |
| 2078 | uint32_t regs; // number of registers |
| 2079 | switch (encoding) { |
| 2080 | case eEncodingT1: |
| 2081 | case eEncodingA1: |
| 2082 | single_regs = false; |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 2083 | d = Bit32(opcode, 22) << 4 | Bits32(opcode, 15, 12); |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2084 | imm32 = Bits32(opcode, 7, 0) * addr_byte_size; |
| 2085 | // If UInt(imm8) is odd, see "FLDMX". |
| 2086 | regs = Bits32(opcode, 7, 0) / 2; |
| 2087 | // if regs == 0 || regs > 16 || (d+regs) > 32 then UNPREDICTABLE; |
| 2088 | if (regs == 0 || regs > 16 || (d + regs) > 32) |
| 2089 | return false; |
| 2090 | break; |
| 2091 | case eEncodingT2: |
| 2092 | case eEncodingA2: |
| 2093 | single_regs = true; |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 2094 | d = Bits32(opcode, 15, 12) << 1 | Bit32(opcode, 22); |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2095 | imm32 = Bits32(opcode, 7, 0) * addr_byte_size; |
| 2096 | regs = Bits32(opcode, 7, 0); |
| 2097 | // if regs == 0 || regs > 16 || (d+regs) > 32 then UNPREDICTABLE; |
| 2098 | if (regs == 0 || regs > 16 || (d + regs) > 32) |
| 2099 | return false; |
| 2100 | break; |
| 2101 | default: |
| 2102 | return false; |
| 2103 | } |
| 2104 | uint32_t start_reg = single_regs ? dwarf_s0 : dwarf_d0; |
| 2105 | uint32_t reg_byte_size = single_regs ? addr_byte_size : addr_byte_size * 2; |
| 2106 | addr_t sp_offset = imm32; |
| 2107 | addr_t addr = sp; |
| 2108 | uint32_t i; |
| 2109 | uint64_t data; // uint64_t to accomodate 64-bit registers. |
| 2110 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2111 | EmulateInstruction::Context context; |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 2112 | if (conditional) |
| 2113 | context.type = EmulateInstruction::eContextRegisterLoad; |
| 2114 | else |
| 2115 | context.type = EmulateInstruction::eContextPopRegisterOffStack; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 2116 | RegisterInfo dwarf_reg; |
| 2117 | RegisterInfo sp_reg; |
| 2118 | GetRegisterInfo (eRegisterKindDWARF, dwarf_sp, sp_reg); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 2119 | for (i=0; i<regs; ++i) |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2120 | { |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 2121 | GetRegisterInfo (eRegisterKindDWARF, start_reg + d + i, dwarf_reg); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 2122 | context.SetRegisterPlusOffset (sp_reg, addr - sp); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 2123 | data = MemARead(context, addr, reg_byte_size, 0, &success); |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2124 | if (!success) |
| 2125 | return false; |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 2126 | if (!WriteRegisterUnsigned(context, &dwarf_reg, data)) |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2127 | return false; |
| 2128 | addr += reg_byte_size; |
| 2129 | } |
| 2130 | |
| 2131 | context.type = EmulateInstruction::eContextAdjustStackPointer; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2132 | context.SetImmediateSigned (sp_offset); |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2133 | |
| 2134 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP, sp + sp_offset)) |
| 2135 | return false; |
| 2136 | } |
| 2137 | return true; |
| 2138 | } |
| 2139 | |
Johnny Chen | b77be41 | 2011-02-04 00:40:18 +0000 | [diff] [blame] | 2140 | // SVC (previously SWI) |
| 2141 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2142 | EmulateInstructionARM::EmulateSVC (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | b77be41 | 2011-02-04 00:40:18 +0000 | [diff] [blame] | 2143 | { |
| 2144 | #if 0 |
| 2145 | // ARM pseudo code... |
| 2146 | if (ConditionPassed()) |
| 2147 | { |
| 2148 | EncodingSpecificOperations(); |
| 2149 | CallSupervisor(); |
| 2150 | } |
| 2151 | #endif |
| 2152 | |
| 2153 | bool success = false; |
Johnny Chen | b77be41 | 2011-02-04 00:40:18 +0000 | [diff] [blame] | 2154 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2155 | if (ConditionPassed(opcode)) |
Johnny Chen | b77be41 | 2011-02-04 00:40:18 +0000 | [diff] [blame] | 2156 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2157 | const uint32_t pc = ReadCoreReg(PC_REG, &success); |
Johnny Chen | b77be41 | 2011-02-04 00:40:18 +0000 | [diff] [blame] | 2158 | addr_t lr; // next instruction address |
| 2159 | if (!success) |
| 2160 | return false; |
| 2161 | uint32_t imm32; // the immediate constant |
| 2162 | uint32_t mode; // ARM or Thumb mode |
| 2163 | switch (encoding) { |
| 2164 | case eEncodingT1: |
| 2165 | lr = (pc + 2) | 1u; // return address |
| 2166 | imm32 = Bits32(opcode, 7, 0); |
| 2167 | mode = eModeThumb; |
| 2168 | break; |
| 2169 | case eEncodingA1: |
| 2170 | lr = pc + 4; // return address |
| 2171 | imm32 = Bits32(opcode, 23, 0); |
| 2172 | mode = eModeARM; |
| 2173 | break; |
| 2174 | default: |
| 2175 | return false; |
| 2176 | } |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2177 | |
| 2178 | EmulateInstruction::Context context; |
| 2179 | context.type = EmulateInstruction::eContextSupervisorCall; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 2180 | context.SetISAAndImmediate (mode, imm32); |
Johnny Chen | b77be41 | 2011-02-04 00:40:18 +0000 | [diff] [blame] | 2181 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_RA, lr)) |
| 2182 | return false; |
| 2183 | } |
| 2184 | return true; |
| 2185 | } |
| 2186 | |
Johnny Chen | c315f86 | 2011-02-05 00:46:10 +0000 | [diff] [blame] | 2187 | // If Then makes up to four following instructions (the IT block) conditional. |
| 2188 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2189 | EmulateInstructionARM::EmulateIT (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | c315f86 | 2011-02-05 00:46:10 +0000 | [diff] [blame] | 2190 | { |
| 2191 | #if 0 |
| 2192 | // ARM pseudo code... |
| 2193 | EncodingSpecificOperations(); |
| 2194 | ITSTATE.IT<7:0> = firstcond:mask; |
| 2195 | #endif |
| 2196 | |
Johnny Chen | c315f86 | 2011-02-05 00:46:10 +0000 | [diff] [blame] | 2197 | m_it_session.InitIT(Bits32(opcode, 7, 0)); |
| 2198 | return true; |
| 2199 | } |
| 2200 | |
Greg Clayton | 04d397c | 2011-05-23 18:04:09 +0000 | [diff] [blame] | 2201 | bool |
| 2202 | EmulateInstructionARM::EmulateNop (const uint32_t opcode, const ARMEncoding encoding) |
| 2203 | { |
| 2204 | // NOP, nothing to do... |
| 2205 | return true; |
| 2206 | } |
| 2207 | |
Johnny Chen | 3b620b3 | 2011-02-07 20:11:47 +0000 | [diff] [blame] | 2208 | // Branch causes a branch to a target address. |
| 2209 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2210 | EmulateInstructionARM::EmulateB (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 3b620b3 | 2011-02-07 20:11:47 +0000 | [diff] [blame] | 2211 | { |
| 2212 | #if 0 |
| 2213 | // ARM pseudo code... |
| 2214 | if (ConditionPassed()) |
| 2215 | { |
| 2216 | EncodingSpecificOperations(); |
| 2217 | BranchWritePC(PC + imm32); |
| 2218 | } |
| 2219 | #endif |
| 2220 | |
| 2221 | bool success = false; |
Johnny Chen | 3b620b3 | 2011-02-07 20:11:47 +0000 | [diff] [blame] | 2222 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2223 | if (ConditionPassed(opcode)) |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2224 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2225 | EmulateInstruction::Context context; |
| 2226 | context.type = EmulateInstruction::eContextRelativeBranchImmediate; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2227 | const uint32_t pc = ReadCoreReg(PC_REG, &success); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2228 | if (!success) |
| 2229 | return false; |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2230 | addr_t target; // target address |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2231 | int32_t imm32; // PC-relative offset |
| 2232 | switch (encoding) { |
| 2233 | case eEncodingT1: |
| 2234 | // The 'cond' field is handled in EmulateInstructionARM::CurrentCond(). |
| 2235 | imm32 = llvm::SignExtend32<9>(Bits32(opcode, 7, 0) << 1); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2236 | target = pc + imm32; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 2237 | context.SetISAAndImmediateSigned (eModeThumb, 4 + imm32); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2238 | break; |
| 2239 | case eEncodingT2: |
| 2240 | imm32 = llvm::SignExtend32<12>(Bits32(opcode, 10, 0)); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2241 | target = pc + imm32; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 2242 | context.SetISAAndImmediateSigned (eModeThumb, 4 + imm32); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2243 | break; |
| 2244 | case eEncodingT3: |
| 2245 | // The 'cond' field is handled in EmulateInstructionARM::CurrentCond(). |
| 2246 | { |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 2247 | uint32_t S = Bit32(opcode, 26); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2248 | uint32_t imm6 = Bits32(opcode, 21, 16); |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 2249 | uint32_t J1 = Bit32(opcode, 13); |
| 2250 | uint32_t J2 = Bit32(opcode, 11); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2251 | uint32_t imm11 = Bits32(opcode, 10, 0); |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2252 | uint32_t imm21 = (S << 20) | (J2 << 19) | (J1 << 18) | (imm6 << 12) | (imm11 << 1); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2253 | imm32 = llvm::SignExtend32<21>(imm21); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2254 | target = pc + imm32; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 2255 | context.SetISAAndImmediateSigned (eModeThumb, 4 + imm32); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2256 | break; |
| 2257 | } |
| 2258 | case eEncodingT4: |
| 2259 | { |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 2260 | uint32_t S = Bit32(opcode, 26); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2261 | uint32_t imm10 = Bits32(opcode, 25, 16); |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 2262 | uint32_t J1 = Bit32(opcode, 13); |
| 2263 | uint32_t J2 = Bit32(opcode, 11); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2264 | uint32_t imm11 = Bits32(opcode, 10, 0); |
| 2265 | uint32_t I1 = !(J1 ^ S); |
| 2266 | uint32_t I2 = !(J2 ^ S); |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2267 | uint32_t imm25 = (S << 24) | (I1 << 23) | (I2 << 22) | (imm10 << 12) | (imm11 << 1); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2268 | imm32 = llvm::SignExtend32<25>(imm25); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2269 | target = pc + imm32; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 2270 | context.SetISAAndImmediateSigned (eModeThumb, 4 + imm32); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2271 | break; |
| 2272 | } |
| 2273 | case eEncodingA1: |
| 2274 | imm32 = llvm::SignExtend32<26>(Bits32(opcode, 23, 0) << 2); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2275 | target = pc + imm32; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 2276 | context.SetISAAndImmediateSigned (eModeARM, 8 + imm32); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2277 | break; |
| 2278 | default: |
| 2279 | return false; |
| 2280 | } |
| 2281 | if (!BranchWritePC(context, target)) |
| 2282 | return false; |
| 2283 | } |
| 2284 | return true; |
Johnny Chen | 3b620b3 | 2011-02-07 20:11:47 +0000 | [diff] [blame] | 2285 | } |
| 2286 | |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2287 | // Compare and Branch on Nonzero and Compare and Branch on Zero compare the value in a register with |
| 2288 | // zero and conditionally branch forward a constant value. They do not affect the condition flags. |
| 2289 | // CBNZ, CBZ |
| 2290 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2291 | EmulateInstructionARM::EmulateCB (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2292 | { |
| 2293 | #if 0 |
| 2294 | // ARM pseudo code... |
| 2295 | EncodingSpecificOperations(); |
| 2296 | if nonzero ^ IsZero(R[n]) then |
| 2297 | BranchWritePC(PC + imm32); |
| 2298 | #endif |
| 2299 | |
| 2300 | bool success = false; |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2301 | |
| 2302 | // Read the register value from the operand register Rn. |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2303 | uint32_t reg_val = ReadCoreReg(Bits32(opcode, 2, 0), &success); |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2304 | if (!success) |
| 2305 | return false; |
| 2306 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2307 | EmulateInstruction::Context context; |
| 2308 | context.type = EmulateInstruction::eContextRelativeBranchImmediate; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2309 | const uint32_t pc = ReadCoreReg(PC_REG, &success); |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2310 | if (!success) |
| 2311 | return false; |
| 2312 | |
| 2313 | addr_t target; // target address |
| 2314 | uint32_t imm32; // PC-relative offset to branch forward |
| 2315 | bool nonzero; |
| 2316 | switch (encoding) { |
| 2317 | case eEncodingT1: |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 2318 | imm32 = Bit32(opcode, 9) << 6 | Bits32(opcode, 7, 3) << 1; |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2319 | nonzero = BitIsSet(opcode, 11); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2320 | target = pc + imm32; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 2321 | context.SetISAAndImmediateSigned (eModeThumb, 4 + imm32); |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2322 | break; |
| 2323 | default: |
| 2324 | return false; |
| 2325 | } |
| 2326 | if (nonzero ^ (reg_val == 0)) |
| 2327 | if (!BranchWritePC(context, target)) |
| 2328 | return false; |
| 2329 | |
| 2330 | return true; |
| 2331 | } |
| 2332 | |
Johnny Chen | 60299ec | 2011-02-17 19:34:27 +0000 | [diff] [blame] | 2333 | // Table Branch Byte causes a PC-relative forward branch using a table of single byte offsets. |
| 2334 | // A base register provides a pointer to the table, and a second register supplies an index into the table. |
| 2335 | // The branch length is twice the value of the byte returned from the table. |
| 2336 | // |
| 2337 | // Table Branch Halfword causes a PC-relative forward branch using a table of single halfword offsets. |
| 2338 | // A base register provides a pointer to the table, and a second register supplies an index into the table. |
| 2339 | // The branch length is twice the value of the halfword returned from the table. |
| 2340 | // TBB, TBH |
| 2341 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2342 | EmulateInstructionARM::EmulateTB (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 60299ec | 2011-02-17 19:34:27 +0000 | [diff] [blame] | 2343 | { |
| 2344 | #if 0 |
| 2345 | // ARM pseudo code... |
| 2346 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 2347 | if is_tbh then |
| 2348 | halfwords = UInt(MemU[R[n]+LSL(R[m],1), 2]); |
| 2349 | else |
| 2350 | halfwords = UInt(MemU[R[n]+R[m], 1]); |
| 2351 | BranchWritePC(PC + 2*halfwords); |
| 2352 | #endif |
| 2353 | |
| 2354 | bool success = false; |
Johnny Chen | 60299ec | 2011-02-17 19:34:27 +0000 | [diff] [blame] | 2355 | |
| 2356 | uint32_t Rn; // the base register which contains the address of the table of branch lengths |
| 2357 | uint32_t Rm; // the index register which contains an integer pointing to a byte/halfword in the table |
| 2358 | bool is_tbh; // true if table branch halfword |
| 2359 | switch (encoding) { |
| 2360 | case eEncodingT1: |
| 2361 | Rn = Bits32(opcode, 19, 16); |
| 2362 | Rm = Bits32(opcode, 3, 0); |
| 2363 | is_tbh = BitIsSet(opcode, 4); |
| 2364 | if (Rn == 13 || BadReg(Rm)) |
| 2365 | return false; |
| 2366 | if (InITBlock() && !LastInITBlock()) |
| 2367 | return false; |
| 2368 | break; |
| 2369 | default: |
| 2370 | return false; |
| 2371 | } |
| 2372 | |
| 2373 | // Read the address of the table from the operand register Rn. |
| 2374 | // The PC can be used, in which case the table immediately follows this instruction. |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2375 | uint32_t base = ReadCoreReg(Rm, &success); |
Johnny Chen | 60299ec | 2011-02-17 19:34:27 +0000 | [diff] [blame] | 2376 | if (!success) |
| 2377 | return false; |
| 2378 | |
| 2379 | // the table index |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2380 | uint32_t index = ReadCoreReg(Rm, &success); |
Johnny Chen | 60299ec | 2011-02-17 19:34:27 +0000 | [diff] [blame] | 2381 | if (!success) |
| 2382 | return false; |
| 2383 | |
| 2384 | // the offsetted table address |
| 2385 | addr_t addr = base + (is_tbh ? index*2 : index); |
| 2386 | |
| 2387 | // PC-relative offset to branch forward |
| 2388 | EmulateInstruction::Context context; |
| 2389 | context.type = EmulateInstruction::eContextTableBranchReadMemory; |
Johnny Chen | 104c8b6 | 2011-02-17 23:27:44 +0000 | [diff] [blame] | 2390 | uint32_t offset = MemURead(context, addr, is_tbh ? 2 : 1, 0, &success) * 2; |
Johnny Chen | 60299ec | 2011-02-17 19:34:27 +0000 | [diff] [blame] | 2391 | if (!success) |
| 2392 | return false; |
| 2393 | |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2394 | const uint32_t pc = ReadCoreReg(PC_REG, &success); |
Johnny Chen | 60299ec | 2011-02-17 19:34:27 +0000 | [diff] [blame] | 2395 | if (!success) |
| 2396 | return false; |
| 2397 | |
| 2398 | // target address |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2399 | addr_t target = pc + offset; |
Johnny Chen | 60299ec | 2011-02-17 19:34:27 +0000 | [diff] [blame] | 2400 | context.type = EmulateInstruction::eContextRelativeBranchImmediate; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 2401 | context.SetISAAndImmediateSigned (eModeThumb, 4 + offset); |
Johnny Chen | 60299ec | 2011-02-17 19:34:27 +0000 | [diff] [blame] | 2402 | |
| 2403 | if (!BranchWritePC(context, target)) |
| 2404 | return false; |
| 2405 | |
| 2406 | return true; |
| 2407 | } |
| 2408 | |
Caroline Tice | dcc11b3 | 2011-03-02 23:57:02 +0000 | [diff] [blame] | 2409 | // This instruction adds an immediate value to a register value, and writes the result to the destination register. |
| 2410 | // It can optionally update the condition flags based on the result. |
| 2411 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2412 | EmulateInstructionARM::EmulateADDImmThumb (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | dcc11b3 | 2011-03-02 23:57:02 +0000 | [diff] [blame] | 2413 | { |
| 2414 | #if 0 |
| 2415 | if ConditionPassed() then |
| 2416 | EncodingSpecificOperations(); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 2417 | (result, carry, overflow) = AddWithCarry(R[n], imm32, '0'); |
Caroline Tice | dcc11b3 | 2011-03-02 23:57:02 +0000 | [diff] [blame] | 2418 | R[d] = result; |
| 2419 | if setflags then |
| 2420 | APSR.N = result<31>; |
| 2421 | APSR.Z = IsZeroBit(result); |
| 2422 | APSR.C = carry; |
| 2423 | APSR.V = overflow; |
| 2424 | #endif |
| 2425 | |
| 2426 | bool success = false; |
Caroline Tice | dcc11b3 | 2011-03-02 23:57:02 +0000 | [diff] [blame] | 2427 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2428 | if (ConditionPassed(opcode)) |
Caroline Tice | dcc11b3 | 2011-03-02 23:57:02 +0000 | [diff] [blame] | 2429 | { |
| 2430 | uint32_t d; |
| 2431 | uint32_t n; |
| 2432 | bool setflags; |
| 2433 | uint32_t imm32; |
| 2434 | uint32_t carry_out; |
| 2435 | |
| 2436 | //EncodingSpecificOperations(); |
| 2437 | switch (encoding) |
| 2438 | { |
| 2439 | case eEncodingT1: |
| 2440 | // d = UInt(Rd); n = UInt(Rn); setflags = !InITBlock(); imm32 = ZeroExtend(imm3, 32); |
| 2441 | d = Bits32 (opcode, 2, 0); |
| 2442 | n = Bits32 (opcode, 5, 3); |
| 2443 | setflags = !InITBlock(); |
| 2444 | imm32 = Bits32 (opcode, 8,6); |
| 2445 | |
| 2446 | break; |
| 2447 | |
| 2448 | case eEncodingT2: |
| 2449 | // d = UInt(Rdn); n = UInt(Rdn); setflags = !InITBlock(); imm32 = ZeroExtend(imm8, 32); |
| 2450 | d = Bits32 (opcode, 10, 8); |
| 2451 | n = Bits32 (opcode, 10, 8); |
| 2452 | setflags = !InITBlock(); |
| 2453 | imm32 = Bits32 (opcode, 7, 0); |
| 2454 | |
| 2455 | break; |
| 2456 | |
| 2457 | case eEncodingT3: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 2458 | // if Rd == '1111' && S == '1' then SEE CMN (immediate); |
| 2459 | // if Rn == '1101' then SEE ADD (SP plus immediate); |
| 2460 | // d = UInt(Rd); n = UInt(Rn); setflags = (S == '1'); imm32 = ThumbExpandImm(i:imm3:imm8); |
Caroline Tice | dcc11b3 | 2011-03-02 23:57:02 +0000 | [diff] [blame] | 2461 | d = Bits32 (opcode, 11, 8); |
| 2462 | n = Bits32 (opcode, 19, 16); |
| 2463 | setflags = BitIsSet (opcode, 20); |
| 2464 | imm32 = ThumbExpandImm_C (opcode, APSR_C, carry_out); |
| 2465 | |
| 2466 | // if BadReg(d) || n == 15 then UNPREDICTABLE; |
| 2467 | if (BadReg (d) || (n == 15)) |
| 2468 | return false; |
| 2469 | |
| 2470 | break; |
| 2471 | |
| 2472 | case eEncodingT4: |
| 2473 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 2474 | // if Rn == '1111' then SEE ADR; |
| 2475 | // if Rn == '1101' then SEE ADD (SP plus immediate); |
Caroline Tice | dcc11b3 | 2011-03-02 23:57:02 +0000 | [diff] [blame] | 2476 | // d = UInt(Rd); n = UInt(Rn); setflags = FALSE; imm32 = ZeroExtend(i:imm3:imm8, 32); |
| 2477 | d = Bits32 (opcode, 11, 8); |
| 2478 | n = Bits32 (opcode, 19, 16); |
| 2479 | setflags = false; |
| 2480 | uint32_t i = Bit32 (opcode, 26); |
| 2481 | uint32_t imm3 = Bits32 (opcode, 14, 12); |
| 2482 | uint32_t imm8 = Bits32 (opcode, 7, 0); |
| 2483 | imm32 = (i << 11) | (imm3 << 8) | imm8; |
| 2484 | |
| 2485 | // if BadReg(d) then UNPREDICTABLE; |
| 2486 | if (BadReg (d)) |
| 2487 | return false; |
| 2488 | |
| 2489 | break; |
| 2490 | } |
| 2491 | default: |
| 2492 | return false; |
| 2493 | } |
| 2494 | |
| 2495 | uint64_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 2496 | if (!success) |
| 2497 | return false; |
| 2498 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 2499 | //(result, carry, overflow) = AddWithCarry(R[n], imm32, '0'); |
Caroline Tice | dcc11b3 | 2011-03-02 23:57:02 +0000 | [diff] [blame] | 2500 | AddWithCarryResult res = AddWithCarry (Rn, imm32, 0); |
| 2501 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 2502 | RegisterInfo reg_n; |
| 2503 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, reg_n); |
Caroline Tice | dcc11b3 | 2011-03-02 23:57:02 +0000 | [diff] [blame] | 2504 | |
| 2505 | EmulateInstruction::Context context; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 2506 | context.type = eContextArithmetic; |
Caroline Tice | dcc11b3 | 2011-03-02 23:57:02 +0000 | [diff] [blame] | 2507 | context.SetRegisterPlusOffset (reg_n, imm32); |
| 2508 | |
| 2509 | //R[d] = result; |
| 2510 | //if setflags then |
| 2511 | //APSR.N = result<31>; |
| 2512 | //APSR.Z = IsZeroBit(result); |
| 2513 | //APSR.C = carry; |
| 2514 | //APSR.V = overflow; |
| 2515 | if (!WriteCoreRegOptionalFlags (context, res.result, d, setflags, res.carry_out, res.overflow)) |
| 2516 | return false; |
| 2517 | |
| 2518 | } |
| 2519 | return true; |
| 2520 | } |
| 2521 | |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2522 | // This instruction adds an immediate value to a register value, and writes the result to the destination |
| 2523 | // register. It can optionally update the condition flags based on the result. |
| 2524 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2525 | EmulateInstructionARM::EmulateADDImmARM (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2526 | { |
| 2527 | #if 0 |
| 2528 | // ARM pseudo code... |
| 2529 | if ConditionPassed() then |
| 2530 | EncodingSpecificOperations(); |
| 2531 | (result, carry, overflow) = AddWithCarry(R[n], imm32, '0'); |
| 2532 | if d == 15 then |
| 2533 | ALUWritePC(result); // setflags is always FALSE here |
| 2534 | else |
| 2535 | R[d] = result; |
| 2536 | if setflags then |
| 2537 | APSR.N = result<31>; |
| 2538 | APSR.Z = IsZeroBit(result); |
| 2539 | APSR.C = carry; |
| 2540 | APSR.V = overflow; |
| 2541 | #endif |
| 2542 | |
| 2543 | bool success = false; |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2544 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2545 | if (ConditionPassed(opcode)) |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2546 | { |
| 2547 | uint32_t Rd, Rn; |
| 2548 | uint32_t imm32; // the immediate value to be added to the value obtained from Rn |
| 2549 | bool setflags; |
| 2550 | switch (encoding) |
| 2551 | { |
| 2552 | case eEncodingA1: |
| 2553 | Rd = Bits32(opcode, 15, 12); |
| 2554 | Rn = Bits32(opcode, 19, 16); |
| 2555 | setflags = BitIsSet(opcode, 20); |
| 2556 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
| 2557 | break; |
| 2558 | default: |
| 2559 | return false; |
| 2560 | } |
| 2561 | |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2562 | // Read the first operand. |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 2563 | uint32_t val1 = ReadCoreReg(Rn, &success); |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2564 | if (!success) |
| 2565 | return false; |
| 2566 | |
| 2567 | AddWithCarryResult res = AddWithCarry(val1, imm32, 0); |
| 2568 | |
| 2569 | EmulateInstruction::Context context; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 2570 | context.type = eContextArithmetic; |
| 2571 | RegisterInfo dwarf_reg; |
| 2572 | GetRegisterInfo (eRegisterKindDWARF, Rn, dwarf_reg); |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 2573 | context.SetRegisterPlusOffset (dwarf_reg, imm32); |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2574 | |
| 2575 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 2576 | return false; |
| 2577 | } |
| 2578 | return true; |
| 2579 | } |
| 2580 | |
Johnny Chen | d761dcf | 2011-02-17 22:03:29 +0000 | [diff] [blame] | 2581 | // This instruction adds a register value and an optionally-shifted register value, and writes the result |
| 2582 | // to the destination register. It can optionally update the condition flags based on the result. |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2583 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2584 | EmulateInstructionARM::EmulateADDReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2585 | { |
| 2586 | #if 0 |
| 2587 | // ARM pseudo code... |
| 2588 | if ConditionPassed() then |
| 2589 | EncodingSpecificOperations(); |
| 2590 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 2591 | (result, carry, overflow) = AddWithCarry(R[n], shifted, '0'); |
| 2592 | if d == 15 then |
| 2593 | ALUWritePC(result); // setflags is always FALSE here |
| 2594 | else |
| 2595 | R[d] = result; |
| 2596 | if setflags then |
| 2597 | APSR.N = result<31>; |
| 2598 | APSR.Z = IsZeroBit(result); |
| 2599 | APSR.C = carry; |
| 2600 | APSR.V = overflow; |
| 2601 | #endif |
| 2602 | |
| 2603 | bool success = false; |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2604 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2605 | if (ConditionPassed(opcode)) |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2606 | { |
| 2607 | uint32_t Rd, Rn, Rm; |
Johnny Chen | d761dcf | 2011-02-17 22:03:29 +0000 | [diff] [blame] | 2608 | ARM_ShifterType shift_t; |
| 2609 | uint32_t shift_n; // the shift applied to the value read from Rm |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 2610 | bool setflags; |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2611 | switch (encoding) |
| 2612 | { |
Johnny Chen | d761dcf | 2011-02-17 22:03:29 +0000 | [diff] [blame] | 2613 | case eEncodingT1: |
| 2614 | Rd = Bits32(opcode, 2, 0); |
| 2615 | Rn = Bits32(opcode, 5, 3); |
| 2616 | Rm = Bits32(opcode, 8, 6); |
| 2617 | setflags = !InITBlock(); |
| 2618 | shift_t = SRType_LSL; |
| 2619 | shift_n = 0; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 2620 | break; |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2621 | case eEncodingT2: |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 2622 | Rd = Rn = Bit32(opcode, 7) << 3 | Bits32(opcode, 2, 0); |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2623 | Rm = Bits32(opcode, 6, 3); |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 2624 | setflags = false; |
Johnny Chen | d761dcf | 2011-02-17 22:03:29 +0000 | [diff] [blame] | 2625 | shift_t = SRType_LSL; |
| 2626 | shift_n = 0; |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2627 | if (Rn == 15 && Rm == 15) |
| 2628 | return false; |
Johnny Chen | d761dcf | 2011-02-17 22:03:29 +0000 | [diff] [blame] | 2629 | if (Rd == 15 && InITBlock() && !LastInITBlock()) |
| 2630 | return false; |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2631 | break; |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2632 | case eEncodingA1: |
| 2633 | Rd = Bits32(opcode, 15, 12); |
| 2634 | Rn = Bits32(opcode, 19, 16); |
| 2635 | Rm = Bits32(opcode, 3, 0); |
| 2636 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 2637 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2638 | break; |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2639 | default: |
| 2640 | return false; |
| 2641 | } |
| 2642 | |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2643 | // Read the first operand. |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 2644 | uint32_t val1 = ReadCoreReg(Rn, &success); |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2645 | if (!success) |
| 2646 | return false; |
| 2647 | |
| 2648 | // Read the second operand. |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 2649 | uint32_t val2 = ReadCoreReg(Rm, &success); |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2650 | if (!success) |
| 2651 | return false; |
| 2652 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 2653 | uint32_t shifted = Shift(val2, shift_t, shift_n, APSR_C, &success); |
| 2654 | if (!success) |
| 2655 | return false; |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2656 | AddWithCarryResult res = AddWithCarry(val1, shifted, 0); |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2657 | |
| 2658 | EmulateInstruction::Context context; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 2659 | context.type = eContextArithmetic; |
| 2660 | RegisterInfo op1_reg; |
| 2661 | RegisterInfo op2_reg; |
| 2662 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + Rn, op1_reg); |
| 2663 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + Rm, op2_reg); |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 2664 | context.SetRegisterRegisterOperands (op1_reg, op2_reg); |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 2665 | |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 2666 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 2667 | return false; |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2668 | } |
| 2669 | return true; |
| 2670 | } |
| 2671 | |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2672 | // Compare Negative (immediate) adds a register value and an immediate value. |
| 2673 | // It updates the condition flags based on the result, and discards the result. |
Johnny Chen | d4dc444 | 2011-02-11 02:02:56 +0000 | [diff] [blame] | 2674 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2675 | EmulateInstructionARM::EmulateCMNImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2676 | { |
| 2677 | #if 0 |
| 2678 | // ARM pseudo code... |
| 2679 | if ConditionPassed() then |
| 2680 | EncodingSpecificOperations(); |
| 2681 | (result, carry, overflow) = AddWithCarry(R[n], imm32, '0'); |
| 2682 | APSR.N = result<31>; |
| 2683 | APSR.Z = IsZeroBit(result); |
| 2684 | APSR.C = carry; |
| 2685 | APSR.V = overflow; |
| 2686 | #endif |
| 2687 | |
| 2688 | bool success = false; |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2689 | |
| 2690 | uint32_t Rn; // the first operand |
| 2691 | uint32_t imm32; // the immediate value to be compared with |
| 2692 | switch (encoding) { |
| 2693 | case eEncodingT1: |
Johnny Chen | 078fbc6 | 2011-02-22 19:48:22 +0000 | [diff] [blame] | 2694 | Rn = Bits32(opcode, 19, 16); |
| 2695 | imm32 = ThumbExpandImm(opcode); // imm32 = ThumbExpandImm(i:imm3:imm8) |
| 2696 | if (Rn == 15) |
| 2697 | return false; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 2698 | break; |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2699 | case eEncodingA1: |
| 2700 | Rn = Bits32(opcode, 19, 16); |
| 2701 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
| 2702 | break; |
| 2703 | default: |
| 2704 | return false; |
| 2705 | } |
| 2706 | // Read the register value from the operand register Rn. |
| 2707 | uint32_t reg_val = ReadCoreReg(Rn, &success); |
| 2708 | if (!success) |
| 2709 | return false; |
| 2710 | |
Johnny Chen | 078fbc6 | 2011-02-22 19:48:22 +0000 | [diff] [blame] | 2711 | AddWithCarryResult res = AddWithCarry(reg_val, imm32, 0); |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2712 | |
| 2713 | EmulateInstruction::Context context; |
| 2714 | context.type = EmulateInstruction::eContextImmediate; |
| 2715 | context.SetNoArgs (); |
| 2716 | if (!WriteFlags(context, res.result, res.carry_out, res.overflow)) |
| 2717 | return false; |
| 2718 | |
| 2719 | return true; |
| 2720 | } |
| 2721 | |
| 2722 | // Compare Negative (register) adds a register value and an optionally-shifted register value. |
| 2723 | // It updates the condition flags based on the result, and discards the result. |
| 2724 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2725 | EmulateInstructionARM::EmulateCMNReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2726 | { |
| 2727 | #if 0 |
| 2728 | // ARM pseudo code... |
| 2729 | if ConditionPassed() then |
| 2730 | EncodingSpecificOperations(); |
| 2731 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 2732 | (result, carry, overflow) = AddWithCarry(R[n], shifted, '0'); |
| 2733 | APSR.N = result<31>; |
| 2734 | APSR.Z = IsZeroBit(result); |
| 2735 | APSR.C = carry; |
| 2736 | APSR.V = overflow; |
| 2737 | #endif |
| 2738 | |
| 2739 | bool success = false; |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2740 | |
| 2741 | uint32_t Rn; // the first operand |
| 2742 | uint32_t Rm; // the second operand |
| 2743 | ARM_ShifterType shift_t; |
| 2744 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 2745 | switch (encoding) { |
| 2746 | case eEncodingT1: |
| 2747 | Rn = Bits32(opcode, 2, 0); |
| 2748 | Rm = Bits32(opcode, 5, 3); |
| 2749 | shift_t = SRType_LSL; |
| 2750 | shift_n = 0; |
| 2751 | break; |
| 2752 | case eEncodingT2: |
Johnny Chen | 078fbc6 | 2011-02-22 19:48:22 +0000 | [diff] [blame] | 2753 | Rn = Bits32(opcode, 19, 16); |
| 2754 | Rm = Bits32(opcode, 3, 0); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 2755 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
Johnny Chen | 078fbc6 | 2011-02-22 19:48:22 +0000 | [diff] [blame] | 2756 | // if n == 15 || BadReg(m) then UNPREDICTABLE; |
| 2757 | if (Rn == 15 || BadReg(Rm)) |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2758 | return false; |
| 2759 | break; |
| 2760 | case eEncodingA1: |
| 2761 | Rn = Bits32(opcode, 19, 16); |
| 2762 | Rm = Bits32(opcode, 3, 0); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 2763 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 2764 | break; |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2765 | default: |
| 2766 | return false; |
| 2767 | } |
| 2768 | // Read the register value from register Rn. |
| 2769 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 2770 | if (!success) |
| 2771 | return false; |
| 2772 | |
| 2773 | // Read the register value from register Rm. |
| 2774 | uint32_t val2 = ReadCoreReg(Rm, &success); |
| 2775 | if (!success) |
| 2776 | return false; |
| 2777 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 2778 | uint32_t shifted = Shift(val2, shift_t, shift_n, APSR_C, &success); |
| 2779 | if (!success) |
| 2780 | return false; |
Johnny Chen | 078fbc6 | 2011-02-22 19:48:22 +0000 | [diff] [blame] | 2781 | AddWithCarryResult res = AddWithCarry(val1, shifted, 0); |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2782 | |
| 2783 | EmulateInstruction::Context context; |
| 2784 | context.type = EmulateInstruction::eContextImmediate; |
| 2785 | context.SetNoArgs(); |
| 2786 | if (!WriteFlags(context, res.result, res.carry_out, res.overflow)) |
| 2787 | return false; |
| 2788 | |
| 2789 | return true; |
| 2790 | } |
| 2791 | |
| 2792 | // Compare (immediate) subtracts an immediate value from a register value. |
| 2793 | // It updates the condition flags based on the result, and discards the result. |
| 2794 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2795 | EmulateInstructionARM::EmulateCMPImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | d4dc444 | 2011-02-11 02:02:56 +0000 | [diff] [blame] | 2796 | { |
| 2797 | #if 0 |
| 2798 | // ARM pseudo code... |
| 2799 | if ConditionPassed() then |
| 2800 | EncodingSpecificOperations(); |
| 2801 | (result, carry, overflow) = AddWithCarry(R[n], NOT(imm32), '1'); |
| 2802 | APSR.N = result<31>; |
| 2803 | APSR.Z = IsZeroBit(result); |
| 2804 | APSR.C = carry; |
| 2805 | APSR.V = overflow; |
| 2806 | #endif |
| 2807 | |
| 2808 | bool success = false; |
Johnny Chen | d4dc444 | 2011-02-11 02:02:56 +0000 | [diff] [blame] | 2809 | |
| 2810 | uint32_t Rn; // the first operand |
| 2811 | uint32_t imm32; // the immediate value to be compared with |
| 2812 | switch (encoding) { |
| 2813 | case eEncodingT1: |
| 2814 | Rn = Bits32(opcode, 10, 8); |
| 2815 | imm32 = Bits32(opcode, 7, 0); |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 2816 | break; |
Johnny Chen | 078fbc6 | 2011-02-22 19:48:22 +0000 | [diff] [blame] | 2817 | case eEncodingT2: |
| 2818 | Rn = Bits32(opcode, 19, 16); |
| 2819 | imm32 = ThumbExpandImm(opcode); // imm32 = ThumbExpandImm(i:imm3:imm8) |
| 2820 | if (Rn == 15) |
| 2821 | return false; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 2822 | break; |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2823 | case eEncodingA1: |
| 2824 | Rn = Bits32(opcode, 19, 16); |
| 2825 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
Johnny Chen | d4dc444 | 2011-02-11 02:02:56 +0000 | [diff] [blame] | 2826 | break; |
| 2827 | default: |
| 2828 | return false; |
| 2829 | } |
| 2830 | // Read the register value from the operand register Rn. |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2831 | uint32_t reg_val = ReadCoreReg(Rn, &success); |
Johnny Chen | d4dc444 | 2011-02-11 02:02:56 +0000 | [diff] [blame] | 2832 | if (!success) |
| 2833 | return false; |
| 2834 | |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 2835 | AddWithCarryResult res = AddWithCarry(reg_val, ~imm32, 1); |
| 2836 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2837 | EmulateInstruction::Context context; |
| 2838 | context.type = EmulateInstruction::eContextImmediate; |
| 2839 | context.SetNoArgs (); |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 2840 | if (!WriteFlags(context, res.result, res.carry_out, res.overflow)) |
| 2841 | return false; |
| 2842 | |
Johnny Chen | d4dc444 | 2011-02-11 02:02:56 +0000 | [diff] [blame] | 2843 | return true; |
| 2844 | } |
| 2845 | |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2846 | // Compare (register) subtracts an optionally-shifted register value from a register value. |
| 2847 | // It updates the condition flags based on the result, and discards the result. |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2848 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2849 | EmulateInstructionARM::EmulateCMPReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2850 | { |
| 2851 | #if 0 |
| 2852 | // ARM pseudo code... |
| 2853 | if ConditionPassed() then |
| 2854 | EncodingSpecificOperations(); |
| 2855 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 2856 | (result, carry, overflow) = AddWithCarry(R[n], NOT(shifted), '1'); |
| 2857 | APSR.N = result<31>; |
| 2858 | APSR.Z = IsZeroBit(result); |
| 2859 | APSR.C = carry; |
| 2860 | APSR.V = overflow; |
| 2861 | #endif |
| 2862 | |
| 2863 | bool success = false; |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2864 | |
| 2865 | uint32_t Rn; // the first operand |
| 2866 | uint32_t Rm; // the second operand |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2867 | ARM_ShifterType shift_t; |
| 2868 | uint32_t shift_n; // the shift applied to the value read from Rm |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2869 | switch (encoding) { |
| 2870 | case eEncodingT1: |
| 2871 | Rn = Bits32(opcode, 2, 0); |
| 2872 | Rm = Bits32(opcode, 5, 3); |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2873 | shift_t = SRType_LSL; |
| 2874 | shift_n = 0; |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2875 | break; |
| 2876 | case eEncodingT2: |
| 2877 | Rn = Bit32(opcode, 7) << 3 | Bits32(opcode, 2, 0); |
| 2878 | Rm = Bits32(opcode, 6, 3); |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2879 | shift_t = SRType_LSL; |
| 2880 | shift_n = 0; |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2881 | if (Rn < 8 && Rm < 8) |
| 2882 | return false; |
| 2883 | if (Rn == 15 || Rm == 15) |
| 2884 | return false; |
| 2885 | break; |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2886 | case eEncodingA1: |
| 2887 | Rn = Bits32(opcode, 19, 16); |
| 2888 | Rm = Bits32(opcode, 3, 0); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 2889 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 2890 | break; |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2891 | default: |
| 2892 | return false; |
| 2893 | } |
| 2894 | // Read the register value from register Rn. |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2895 | uint32_t val1 = ReadCoreReg(Rn, &success); |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2896 | if (!success) |
| 2897 | return false; |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2898 | |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2899 | // Read the register value from register Rm. |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2900 | uint32_t val2 = ReadCoreReg(Rm, &success); |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2901 | if (!success) |
| 2902 | return false; |
| 2903 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 2904 | uint32_t shifted = Shift(val2, shift_t, shift_n, APSR_C, &success); |
| 2905 | if (!success) |
| 2906 | return false; |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2907 | AddWithCarryResult res = AddWithCarry(val1, ~shifted, 1); |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 2908 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2909 | EmulateInstruction::Context context; |
| 2910 | context.type = EmulateInstruction::eContextImmediate; |
| 2911 | context.SetNoArgs(); |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 2912 | if (!WriteFlags(context, res.result, res.carry_out, res.overflow)) |
| 2913 | return false; |
| 2914 | |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2915 | return true; |
| 2916 | } |
| 2917 | |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 2918 | // Arithmetic Shift Right (immediate) shifts a register value right by an immediate number of bits, |
| 2919 | // shifting in copies of its sign bit, and writes the result to the destination register. It can |
| 2920 | // optionally update the condition flags based on the result. |
| 2921 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2922 | EmulateInstructionARM::EmulateASRImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 2923 | { |
| 2924 | #if 0 |
| 2925 | // ARM pseudo code... |
| 2926 | if ConditionPassed() then |
| 2927 | EncodingSpecificOperations(); |
| 2928 | (result, carry) = Shift_C(R[m], SRType_ASR, shift_n, APSR.C); |
| 2929 | if d == 15 then // Can only occur for ARM encoding |
| 2930 | ALUWritePC(result); // setflags is always FALSE here |
| 2931 | else |
| 2932 | R[d] = result; |
| 2933 | if setflags then |
| 2934 | APSR.N = result<31>; |
| 2935 | APSR.Z = IsZeroBit(result); |
| 2936 | APSR.C = carry; |
| 2937 | // APSR.V unchanged |
| 2938 | #endif |
| 2939 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2940 | return EmulateShiftImm (opcode, encoding, SRType_ASR); |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 2941 | } |
| 2942 | |
| 2943 | // Arithmetic Shift Right (register) shifts a register value right by a variable number of bits, |
| 2944 | // shifting in copies of its sign bit, and writes the result to the destination register. |
| 2945 | // The variable number of bits is read from the bottom byte of a register. It can optionally update |
| 2946 | // the condition flags based on the result. |
| 2947 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2948 | EmulateInstructionARM::EmulateASRReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 2949 | { |
| 2950 | #if 0 |
| 2951 | // ARM pseudo code... |
| 2952 | if ConditionPassed() then |
| 2953 | EncodingSpecificOperations(); |
| 2954 | shift_n = UInt(R[m]<7:0>); |
| 2955 | (result, carry) = Shift_C(R[m], SRType_ASR, shift_n, APSR.C); |
| 2956 | R[d] = result; |
| 2957 | if setflags then |
| 2958 | APSR.N = result<31>; |
| 2959 | APSR.Z = IsZeroBit(result); |
| 2960 | APSR.C = carry; |
| 2961 | // APSR.V unchanged |
| 2962 | #endif |
| 2963 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2964 | return EmulateShiftReg (opcode, encoding, SRType_ASR); |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 2965 | } |
| 2966 | |
| 2967 | // Logical Shift Left (immediate) shifts a register value left by an immediate number of bits, |
| 2968 | // shifting in zeros, and writes the result to the destination register. It can optionally |
| 2969 | // update the condition flags based on the result. |
| 2970 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2971 | EmulateInstructionARM::EmulateLSLImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 2972 | { |
| 2973 | #if 0 |
| 2974 | // ARM pseudo code... |
| 2975 | if ConditionPassed() then |
| 2976 | EncodingSpecificOperations(); |
| 2977 | (result, carry) = Shift_C(R[m], SRType_LSL, shift_n, APSR.C); |
| 2978 | if d == 15 then // Can only occur for ARM encoding |
| 2979 | ALUWritePC(result); // setflags is always FALSE here |
| 2980 | else |
| 2981 | R[d] = result; |
| 2982 | if setflags then |
| 2983 | APSR.N = result<31>; |
| 2984 | APSR.Z = IsZeroBit(result); |
| 2985 | APSR.C = carry; |
| 2986 | // APSR.V unchanged |
| 2987 | #endif |
| 2988 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2989 | return EmulateShiftImm (opcode, encoding, SRType_LSL); |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 2990 | } |
| 2991 | |
| 2992 | // Logical Shift Left (register) shifts a register value left by a variable number of bits, |
| 2993 | // shifting in zeros, and writes the result to the destination register. The variable number |
| 2994 | // of bits is read from the bottom byte of a register. It can optionally update the condition |
| 2995 | // flags based on the result. |
| 2996 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2997 | EmulateInstructionARM::EmulateLSLReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 2998 | { |
| 2999 | #if 0 |
| 3000 | // ARM pseudo code... |
| 3001 | if ConditionPassed() then |
| 3002 | EncodingSpecificOperations(); |
| 3003 | shift_n = UInt(R[m]<7:0>); |
| 3004 | (result, carry) = Shift_C(R[m], SRType_LSL, shift_n, APSR.C); |
| 3005 | R[d] = result; |
| 3006 | if setflags then |
| 3007 | APSR.N = result<31>; |
| 3008 | APSR.Z = IsZeroBit(result); |
| 3009 | APSR.C = carry; |
| 3010 | // APSR.V unchanged |
| 3011 | #endif |
| 3012 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3013 | return EmulateShiftReg (opcode, encoding, SRType_LSL); |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 3014 | } |
| 3015 | |
| 3016 | // Logical Shift Right (immediate) shifts a register value right by an immediate number of bits, |
| 3017 | // shifting in zeros, and writes the result to the destination register. It can optionally |
| 3018 | // update the condition flags based on the result. |
| 3019 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3020 | EmulateInstructionARM::EmulateLSRImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 3021 | { |
| 3022 | #if 0 |
| 3023 | // ARM pseudo code... |
| 3024 | if ConditionPassed() then |
| 3025 | EncodingSpecificOperations(); |
| 3026 | (result, carry) = Shift_C(R[m], SRType_LSR, shift_n, APSR.C); |
| 3027 | if d == 15 then // Can only occur for ARM encoding |
| 3028 | ALUWritePC(result); // setflags is always FALSE here |
| 3029 | else |
| 3030 | R[d] = result; |
| 3031 | if setflags then |
| 3032 | APSR.N = result<31>; |
| 3033 | APSR.Z = IsZeroBit(result); |
| 3034 | APSR.C = carry; |
| 3035 | // APSR.V unchanged |
| 3036 | #endif |
| 3037 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3038 | return EmulateShiftImm (opcode, encoding, SRType_LSR); |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 3039 | } |
| 3040 | |
| 3041 | // Logical Shift Right (register) shifts a register value right by a variable number of bits, |
| 3042 | // shifting in zeros, and writes the result to the destination register. The variable number |
| 3043 | // of bits is read from the bottom byte of a register. It can optionally update the condition |
| 3044 | // flags based on the result. |
| 3045 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3046 | EmulateInstructionARM::EmulateLSRReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 3047 | { |
| 3048 | #if 0 |
| 3049 | // ARM pseudo code... |
| 3050 | if ConditionPassed() then |
| 3051 | EncodingSpecificOperations(); |
| 3052 | shift_n = UInt(R[m]<7:0>); |
| 3053 | (result, carry) = Shift_C(R[m], SRType_LSR, shift_n, APSR.C); |
| 3054 | R[d] = result; |
| 3055 | if setflags then |
| 3056 | APSR.N = result<31>; |
| 3057 | APSR.Z = IsZeroBit(result); |
| 3058 | APSR.C = carry; |
| 3059 | // APSR.V unchanged |
| 3060 | #endif |
| 3061 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3062 | return EmulateShiftReg (opcode, encoding, SRType_LSR); |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 3063 | } |
| 3064 | |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3065 | // Rotate Right (immediate) provides the value of the contents of a register rotated by a constant value. |
| 3066 | // The bits that are rotated off the right end are inserted into the vacated bit positions on the left. |
| 3067 | // It can optionally update the condition flags based on the result. |
| 3068 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3069 | EmulateInstructionARM::EmulateRORImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3070 | { |
| 3071 | #if 0 |
| 3072 | // ARM pseudo code... |
| 3073 | if ConditionPassed() then |
| 3074 | EncodingSpecificOperations(); |
| 3075 | (result, carry) = Shift_C(R[m], SRType_ROR, shift_n, APSR.C); |
| 3076 | if d == 15 then // Can only occur for ARM encoding |
| 3077 | ALUWritePC(result); // setflags is always FALSE here |
| 3078 | else |
| 3079 | R[d] = result; |
| 3080 | if setflags then |
| 3081 | APSR.N = result<31>; |
| 3082 | APSR.Z = IsZeroBit(result); |
| 3083 | APSR.C = carry; |
| 3084 | // APSR.V unchanged |
| 3085 | #endif |
| 3086 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3087 | return EmulateShiftImm (opcode, encoding, SRType_ROR); |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3088 | } |
| 3089 | |
| 3090 | // Rotate Right (register) provides the value of the contents of a register rotated by a variable number of bits. |
| 3091 | // The bits that are rotated off the right end are inserted into the vacated bit positions on the left. |
| 3092 | // The variable number of bits is read from the bottom byte of a register. It can optionally update the condition |
| 3093 | // flags based on the result. |
| 3094 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3095 | EmulateInstructionARM::EmulateRORReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3096 | { |
| 3097 | #if 0 |
| 3098 | // ARM pseudo code... |
| 3099 | if ConditionPassed() then |
| 3100 | EncodingSpecificOperations(); |
| 3101 | shift_n = UInt(R[m]<7:0>); |
| 3102 | (result, carry) = Shift_C(R[m], SRType_ROR, shift_n, APSR.C); |
| 3103 | R[d] = result; |
| 3104 | if setflags then |
| 3105 | APSR.N = result<31>; |
| 3106 | APSR.Z = IsZeroBit(result); |
| 3107 | APSR.C = carry; |
| 3108 | // APSR.V unchanged |
| 3109 | #endif |
| 3110 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3111 | return EmulateShiftReg (opcode, encoding, SRType_ROR); |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3112 | } |
| 3113 | |
| 3114 | // Rotate Right with Extend provides the value of the contents of a register shifted right by one place, |
| 3115 | // with the carry flag shifted into bit [31]. |
| 3116 | // |
| 3117 | // RRX can optionally update the condition flags based on the result. |
| 3118 | // In that case, bit [0] is shifted into the carry flag. |
| 3119 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3120 | EmulateInstructionARM::EmulateRRX (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3121 | { |
| 3122 | #if 0 |
| 3123 | // ARM pseudo code... |
| 3124 | if ConditionPassed() then |
| 3125 | EncodingSpecificOperations(); |
| 3126 | (result, carry) = Shift_C(R[m], SRType_RRX, 1, APSR.C); |
| 3127 | if d == 15 then // Can only occur for ARM encoding |
| 3128 | ALUWritePC(result); // setflags is always FALSE here |
| 3129 | else |
| 3130 | R[d] = result; |
| 3131 | if setflags then |
| 3132 | APSR.N = result<31>; |
| 3133 | APSR.Z = IsZeroBit(result); |
| 3134 | APSR.C = carry; |
| 3135 | // APSR.V unchanged |
| 3136 | #endif |
| 3137 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3138 | return EmulateShiftImm (opcode, encoding, SRType_RRX); |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3139 | } |
| 3140 | |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 3141 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3142 | EmulateInstructionARM::EmulateShiftImm (const uint32_t opcode, const ARMEncoding encoding, ARM_ShifterType shift_type) |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 3143 | { |
Greg Clayton | e1f47bb | 2011-06-02 22:23:35 +0000 | [diff] [blame] | 3144 | // assert(shift_type == SRType_ASR |
| 3145 | // || shift_type == SRType_LSL |
| 3146 | // || shift_type == SRType_LSR |
| 3147 | // || shift_type == SRType_ROR |
| 3148 | // || shift_type == SRType_RRX); |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 3149 | |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3150 | bool success = false; |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3151 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3152 | if (ConditionPassed(opcode)) |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3153 | { |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3154 | uint32_t Rd; // the destination register |
| 3155 | uint32_t Rm; // the first operand register |
| 3156 | uint32_t imm5; // encoding for the shift amount |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3157 | uint32_t carry; // the carry bit after the shift operation |
| 3158 | bool setflags; |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3159 | |
| 3160 | // Special case handling! |
| 3161 | // A8.6.139 ROR (immediate) -- Encoding T1 |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3162 | ARMEncoding use_encoding = encoding; |
| 3163 | if (shift_type == SRType_ROR && use_encoding == eEncodingT1) |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3164 | { |
| 3165 | // Morph the T1 encoding from the ARM Architecture Manual into T2 encoding to |
| 3166 | // have the same decoding of bit fields as the other Thumb2 shift operations. |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3167 | use_encoding = eEncodingT2; |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3168 | } |
| 3169 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3170 | switch (use_encoding) { |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3171 | case eEncodingT1: |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3172 | // Due to the above special case handling! |
Johnny Chen | 6cc6097 | 2011-06-02 23:07:03 +0000 | [diff] [blame] | 3173 | if (shift_type == SRType_ROR) |
| 3174 | return false; |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3175 | |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3176 | Rd = Bits32(opcode, 2, 0); |
| 3177 | Rm = Bits32(opcode, 5, 3); |
| 3178 | setflags = !InITBlock(); |
| 3179 | imm5 = Bits32(opcode, 10, 6); |
| 3180 | break; |
| 3181 | case eEncodingT2: |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3182 | // A8.6.141 RRX |
Johnny Chen | 6cc6097 | 2011-06-02 23:07:03 +0000 | [diff] [blame] | 3183 | // There's no imm form of RRX instructions. |
| 3184 | if (shift_type == SRType_RRX) |
| 3185 | return false; |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3186 | |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3187 | Rd = Bits32(opcode, 11, 8); |
| 3188 | Rm = Bits32(opcode, 3, 0); |
| 3189 | setflags = BitIsSet(opcode, 20); |
| 3190 | imm5 = Bits32(opcode, 14, 12) << 2 | Bits32(opcode, 7, 6); |
| 3191 | if (BadReg(Rd) || BadReg(Rm)) |
| 3192 | return false; |
| 3193 | break; |
| 3194 | case eEncodingA1: |
| 3195 | Rd = Bits32(opcode, 15, 12); |
| 3196 | Rm = Bits32(opcode, 3, 0); |
| 3197 | setflags = BitIsSet(opcode, 20); |
| 3198 | imm5 = Bits32(opcode, 11, 7); |
| 3199 | break; |
| 3200 | default: |
| 3201 | return false; |
| 3202 | } |
| 3203 | |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3204 | // A8.6.139 ROR (immediate) |
| 3205 | if (shift_type == SRType_ROR && imm5 == 0) |
| 3206 | shift_type = SRType_RRX; |
| 3207 | |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3208 | // Get the first operand. |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 3209 | uint32_t value = ReadCoreReg (Rm, &success); |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3210 | if (!success) |
| 3211 | return false; |
| 3212 | |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3213 | // Decode the shift amount if not RRX. |
| 3214 | uint32_t amt = (shift_type == SRType_RRX ? 1 : DecodeImmShift(shift_type, imm5)); |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3215 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 3216 | uint32_t result = Shift_C(value, shift_type, amt, APSR_C, carry, &success); |
| 3217 | if (!success) |
| 3218 | return false; |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3219 | |
| 3220 | // The context specifies that an immediate is to be moved into Rd. |
| 3221 | EmulateInstruction::Context context; |
| 3222 | context.type = EmulateInstruction::eContextImmediate; |
| 3223 | context.SetNoArgs (); |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3224 | |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 3225 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 3226 | return false; |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3227 | } |
| 3228 | return true; |
| 3229 | } |
| 3230 | |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3231 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3232 | EmulateInstructionARM::EmulateShiftReg (const uint32_t opcode, const ARMEncoding encoding, ARM_ShifterType shift_type) |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3233 | { |
Greg Clayton | e1f47bb | 2011-06-02 22:23:35 +0000 | [diff] [blame] | 3234 | // assert(shift_type == SRType_ASR |
| 3235 | // || shift_type == SRType_LSL |
| 3236 | // || shift_type == SRType_LSR |
| 3237 | // || shift_type == SRType_ROR); |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3238 | |
| 3239 | bool success = false; |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3240 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3241 | if (ConditionPassed(opcode)) |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3242 | { |
| 3243 | uint32_t Rd; // the destination register |
| 3244 | uint32_t Rn; // the first operand register |
| 3245 | uint32_t Rm; // the register whose bottom byte contains the amount to shift by |
| 3246 | uint32_t carry; // the carry bit after the shift operation |
| 3247 | bool setflags; |
| 3248 | switch (encoding) { |
| 3249 | case eEncodingT1: |
| 3250 | Rd = Bits32(opcode, 2, 0); |
| 3251 | Rn = Rd; |
| 3252 | Rm = Bits32(opcode, 5, 3); |
| 3253 | setflags = !InITBlock(); |
| 3254 | break; |
| 3255 | case eEncodingT2: |
| 3256 | Rd = Bits32(opcode, 11, 8); |
| 3257 | Rn = Bits32(opcode, 19, 16); |
| 3258 | Rm = Bits32(opcode, 3, 0); |
| 3259 | setflags = BitIsSet(opcode, 20); |
| 3260 | if (BadReg(Rd) || BadReg(Rn) || BadReg(Rm)) |
| 3261 | return false; |
| 3262 | break; |
| 3263 | case eEncodingA1: |
| 3264 | Rd = Bits32(opcode, 15, 12); |
| 3265 | Rn = Bits32(opcode, 3, 0); |
| 3266 | Rm = Bits32(opcode, 11, 8); |
| 3267 | setflags = BitIsSet(opcode, 20); |
| 3268 | if (Rd == 15 || Rn == 15 || Rm == 15) |
| 3269 | return false; |
| 3270 | break; |
| 3271 | default: |
| 3272 | return false; |
| 3273 | } |
| 3274 | |
| 3275 | // Get the first operand. |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 3276 | uint32_t value = ReadCoreReg (Rn, &success); |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3277 | if (!success) |
| 3278 | return false; |
| 3279 | // Get the Rm register content. |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 3280 | uint32_t val = ReadCoreReg (Rm, &success); |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3281 | if (!success) |
| 3282 | return false; |
| 3283 | |
| 3284 | // Get the shift amount. |
| 3285 | uint32_t amt = Bits32(val, 7, 0); |
| 3286 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 3287 | uint32_t result = Shift_C(value, shift_type, amt, APSR_C, carry, &success); |
| 3288 | if (!success) |
| 3289 | return false; |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3290 | |
| 3291 | // The context specifies that an immediate is to be moved into Rd. |
| 3292 | EmulateInstruction::Context context; |
| 3293 | context.type = EmulateInstruction::eContextImmediate; |
| 3294 | context.SetNoArgs (); |
| 3295 | |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 3296 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3297 | return false; |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3298 | } |
| 3299 | return true; |
| 3300 | } |
| 3301 | |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3302 | // LDM loads multiple registers from consecutive memory locations, using an |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3303 | // address from a base register. Optionally the address just above the highest of those locations |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3304 | // can be written back to the base register. |
| 3305 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3306 | EmulateInstructionARM::EmulateLDM (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3307 | { |
| 3308 | #if 0 |
| 3309 | // ARM pseudo code... |
| 3310 | if ConditionPassed() |
| 3311 | EncodingSpecificOperations(); NullCheckIfThumbEE (n); |
| 3312 | address = R[n]; |
| 3313 | |
| 3314 | for i = 0 to 14 |
| 3315 | if registers<i> == '1' then |
| 3316 | R[i] = MemA[address, 4]; address = address + 4; |
| 3317 | if registers<15> == '1' then |
| 3318 | LoadWritePC (MemA[address, 4]); |
| 3319 | |
| 3320 | if wback && registers<n> == '0' then R[n] = R[n] + 4 * BitCount (registers); |
| 3321 | if wback && registers<n> == '1' then R[n] = bits(32) UNKNOWN; // Only possible for encoding A1 |
| 3322 | |
| 3323 | #endif |
| 3324 | |
| 3325 | bool success = false; |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 3326 | bool conditional = false; |
| 3327 | if (ConditionPassed(opcode, &conditional)) |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3328 | { |
| 3329 | uint32_t n; |
| 3330 | uint32_t registers = 0; |
| 3331 | bool wback; |
| 3332 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 3333 | switch (encoding) |
| 3334 | { |
| 3335 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3336 | // n = UInt(Rn); registers = '00000000':register_list; wback = (registers<n> == '0'); |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3337 | n = Bits32 (opcode, 10, 8); |
| 3338 | registers = Bits32 (opcode, 7, 0); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 3339 | registers = registers & 0x00ff; // Make sure the top 8 bits are zeros. |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3340 | wback = BitIsClear (registers, n); |
| 3341 | // if BitCount(registers) < 1 then UNPREDICTABLE; |
| 3342 | if (BitCount(registers) < 1) |
| 3343 | return false; |
| 3344 | break; |
| 3345 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3346 | // if W == '1' && Rn == '1101' then SEE POP; |
| 3347 | // n = UInt(Rn); registers = P:M:'0':register_list; wback = (W == '1'); |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3348 | n = Bits32 (opcode, 19, 16); |
| 3349 | registers = Bits32 (opcode, 15, 0); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 3350 | registers = registers & 0xdfff; // Make sure bit 13 is zero. |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3351 | wback = BitIsSet (opcode, 21); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 3352 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3353 | // if n == 15 || BitCount(registers) < 2 || (P == '1' && M == '1') then UNPREDICTABLE; |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3354 | if ((n == 15) |
| 3355 | || (BitCount (registers) < 2) |
| 3356 | || (BitIsSet (opcode, 14) && BitIsSet (opcode, 15))) |
| 3357 | return false; |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 3358 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3359 | // if registers<15> == '1' && InITBlock() && !LastInITBlock() then UNPREDICTABLE; |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 3360 | if (BitIsSet (registers, 15) && InITBlock() && !LastInITBlock()) |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3361 | return false; |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 3362 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3363 | // if wback && registers<n> == '1' then UNPREDICTABLE; |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3364 | if (wback |
| 3365 | && BitIsSet (registers, n)) |
| 3366 | return false; |
| 3367 | break; |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 3368 | |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3369 | case eEncodingA1: |
| 3370 | n = Bits32 (opcode, 19, 16); |
| 3371 | registers = Bits32 (opcode, 15, 0); |
| 3372 | wback = BitIsSet (opcode, 21); |
| 3373 | if ((n == 15) |
| 3374 | || (BitCount (registers) < 1)) |
| 3375 | return false; |
| 3376 | break; |
| 3377 | default: |
| 3378 | return false; |
| 3379 | } |
| 3380 | |
| 3381 | int32_t offset = 0; |
| 3382 | const addr_t base_address = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 3383 | if (!success) |
| 3384 | return false; |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3385 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3386 | EmulateInstruction::Context context; |
| 3387 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 3388 | RegisterInfo dwarf_reg; |
| 3389 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, dwarf_reg); |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3390 | context.SetRegisterPlusOffset (dwarf_reg, offset); |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3391 | |
| 3392 | for (int i = 0; i < 14; ++i) |
| 3393 | { |
| 3394 | if (BitIsSet (registers, i)) |
| 3395 | { |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3396 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3397 | context.SetRegisterPlusOffset (dwarf_reg, offset); |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3398 | if (wback && (n == 13)) // Pop Instruction |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 3399 | { |
| 3400 | if (conditional) |
| 3401 | context.type = EmulateInstruction::eContextRegisterLoad; |
| 3402 | else |
| 3403 | context.type = EmulateInstruction::eContextPopRegisterOffStack; |
| 3404 | } |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3405 | |
| 3406 | // R[i] = MemA [address, 4]; address = address + 4; |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3407 | uint32_t data = MemARead (context, base_address + offset, addr_byte_size, 0, &success); |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3408 | if (!success) |
| 3409 | return false; |
| 3410 | |
| 3411 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + i, data)) |
| 3412 | return false; |
| 3413 | |
| 3414 | offset += addr_byte_size; |
| 3415 | } |
| 3416 | } |
| 3417 | |
| 3418 | if (BitIsSet (registers, 15)) |
| 3419 | { |
| 3420 | //LoadWritePC (MemA [address, 4]); |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3421 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3422 | context.SetRegisterPlusOffset (dwarf_reg, offset); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3423 | uint32_t data = MemARead (context, base_address + offset, addr_byte_size, 0, &success); |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3424 | if (!success) |
| 3425 | return false; |
Johnny Chen | e62b50d | 2011-02-09 22:02:17 +0000 | [diff] [blame] | 3426 | // In ARMv5T and above, this is an interworking branch. |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 3427 | if (!LoadWritePC(context, data)) |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3428 | return false; |
| 3429 | } |
| 3430 | |
| 3431 | if (wback && BitIsClear (registers, n)) |
| 3432 | { |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3433 | // R[n] = R[n] + 4 * BitCount (registers) |
| 3434 | int32_t offset = addr_byte_size * BitCount (registers); |
| 3435 | context.type = EmulateInstruction::eContextAdjustBaseRegister; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3436 | context.SetRegisterPlusOffset (dwarf_reg, offset); |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3437 | |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3438 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, base_address + offset)) |
| 3439 | return false; |
| 3440 | } |
| 3441 | if (wback && BitIsSet (registers, n)) |
| 3442 | // R[n] bits(32) UNKNOWN; |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3443 | return WriteBits32Unknown (n); |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3444 | } |
| 3445 | return true; |
| 3446 | } |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3447 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3448 | // LDMDA loads multiple registers from consecutive memory locations using an address from a base register. |
| 3449 | // The consecutive memory locations end at this address and the address just below the lowest of those locations |
| 3450 | // can optionally be written back to the base register. |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3451 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3452 | EmulateInstructionARM::EmulateLDMDA (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3453 | { |
| 3454 | #if 0 |
| 3455 | // ARM pseudo code... |
| 3456 | if ConditionPassed() then |
| 3457 | EncodingSpecificOperations(); |
| 3458 | address = R[n] - 4*BitCount(registers) + 4; |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3459 | |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3460 | for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3461 | if registers<i> == '1' then |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3462 | R[i] = MemA[address,4]; address = address + 4; |
| 3463 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3464 | if registers<15> == '1' then |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3465 | LoadWritePC(MemA[address,4]); |
| 3466 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3467 | if wback && registers<n> == '0' then R[n] = R[n] - 4*BitCount(registers); |
| 3468 | if wback && registers<n> == '1' then R[n] = bits(32) UNKNOWN; |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3469 | #endif |
| 3470 | |
| 3471 | bool success = false; |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3472 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3473 | if (ConditionPassed(opcode)) |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3474 | { |
| 3475 | uint32_t n; |
| 3476 | uint32_t registers = 0; |
| 3477 | bool wback; |
| 3478 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 3479 | |
| 3480 | // EncodingSpecificOperations(); |
| 3481 | switch (encoding) |
| 3482 | { |
| 3483 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3484 | // n = UInt(Rn); registers = register_list; wback = (W == '1'); |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3485 | n = Bits32 (opcode, 19, 16); |
| 3486 | registers = Bits32 (opcode, 15, 0); |
| 3487 | wback = BitIsSet (opcode, 21); |
| 3488 | |
| 3489 | // if n == 15 || BitCount(registers) < 1 then UNPREDICTABLE; |
| 3490 | if ((n == 15) || (BitCount (registers) < 1)) |
| 3491 | return false; |
| 3492 | |
| 3493 | break; |
| 3494 | |
| 3495 | default: |
| 3496 | return false; |
| 3497 | } |
| 3498 | // address = R[n] - 4*BitCount(registers) + 4; |
| 3499 | |
| 3500 | int32_t offset = 0; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3501 | addr_t Rn = ReadCoreReg (n, &success); |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3502 | |
| 3503 | if (!success) |
| 3504 | return false; |
| 3505 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3506 | addr_t address = Rn - (addr_byte_size * BitCount (registers)) + addr_byte_size; |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3507 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3508 | EmulateInstruction::Context context; |
| 3509 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 3510 | RegisterInfo dwarf_reg; |
| 3511 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, dwarf_reg); |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3512 | context.SetRegisterPlusOffset (dwarf_reg, offset); |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3513 | |
| 3514 | // for i = 0 to 14 |
| 3515 | for (int i = 0; i < 14; ++i) |
| 3516 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3517 | // if registers<i> == '1' then |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3518 | if (BitIsSet (registers, i)) |
| 3519 | { |
| 3520 | // R[i] = MemA[address,4]; address = address + 4; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3521 | context.SetRegisterPlusOffset (dwarf_reg, Rn - (address + offset)); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3522 | uint32_t data = MemARead (context, address + offset, addr_byte_size, 0, &success); |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3523 | if (!success) |
| 3524 | return false; |
| 3525 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + i, data)) |
| 3526 | return false; |
| 3527 | offset += addr_byte_size; |
| 3528 | } |
| 3529 | } |
| 3530 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3531 | // if registers<15> == '1' then |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3532 | // LoadWritePC(MemA[address,4]); |
| 3533 | if (BitIsSet (registers, 15)) |
| 3534 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3535 | context.SetRegisterPlusOffset (dwarf_reg, offset); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3536 | uint32_t data = MemARead (context, address + offset, addr_byte_size, 0, &success); |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3537 | if (!success) |
| 3538 | return false; |
Johnny Chen | 44c10f0 | 2011-02-11 19:37:03 +0000 | [diff] [blame] | 3539 | // In ARMv5T and above, this is an interworking branch. |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 3540 | if (!LoadWritePC(context, data)) |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3541 | return false; |
| 3542 | } |
| 3543 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3544 | // if wback && registers<n> == '0' then R[n] = R[n] - 4*BitCount(registers); |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3545 | if (wback && BitIsClear (registers, n)) |
| 3546 | { |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3547 | if (!success) |
| 3548 | return false; |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3549 | |
| 3550 | offset = (addr_byte_size * BitCount (registers)) * -1; |
| 3551 | context.type = EmulateInstruction::eContextAdjustBaseRegister; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3552 | context.SetImmediateSigned (offset); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3553 | addr_t addr = Rn + offset; |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3554 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, addr)) |
| 3555 | return false; |
| 3556 | } |
| 3557 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3558 | // if wback && registers<n> == '1' then R[n] = bits(32) UNKNOWN; |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3559 | if (wback && BitIsSet (registers, n)) |
| 3560 | return WriteBits32Unknown (n); |
| 3561 | } |
| 3562 | return true; |
| 3563 | } |
| 3564 | |
| 3565 | // LDMDB loads multiple registers from consecutive memory locations using an address from a base register. The |
| 3566 | // consecutive memory lcoations end just below this address, and the address of the lowest of those locations can |
| 3567 | // be optionally written back to the base register. |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3568 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3569 | EmulateInstructionARM::EmulateLDMDB (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3570 | { |
| 3571 | #if 0 |
| 3572 | // ARM pseudo code... |
| 3573 | if ConditionPassed() then |
| 3574 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 3575 | address = R[n] - 4*BitCount(registers); |
| 3576 | |
| 3577 | for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3578 | if registers<i> == '1' then |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3579 | R[i] = MemA[address,4]; address = address + 4; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3580 | if registers<15> == '1' then |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3581 | LoadWritePC(MemA[address,4]); |
| 3582 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3583 | if wback && registers<n> == '0' then R[n] = R[n] - 4*BitCount(registers); |
| 3584 | if wback && registers<n> == '1' then R[n] = bits(32) UNKNOWN; // Only possible for encoding A1 |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3585 | #endif |
| 3586 | |
| 3587 | bool success = false; |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3588 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3589 | if (ConditionPassed(opcode)) |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3590 | { |
| 3591 | uint32_t n; |
| 3592 | uint32_t registers = 0; |
| 3593 | bool wback; |
| 3594 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 3595 | switch (encoding) |
| 3596 | { |
| 3597 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3598 | // n = UInt(Rn); registers = P:M:'0':register_list; wback = (W == '1'); |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3599 | n = Bits32 (opcode, 19, 16); |
| 3600 | registers = Bits32 (opcode, 15, 0); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 3601 | registers = registers & 0xdfff; // Make sure bit 13 is a zero. |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3602 | wback = BitIsSet (opcode, 21); |
| 3603 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3604 | // if n == 15 || BitCount(registers) < 2 || (P == '1' && M == '1') then UNPREDICTABLE; |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3605 | if ((n == 15) |
| 3606 | || (BitCount (registers) < 2) |
| 3607 | || (BitIsSet (opcode, 14) && BitIsSet (opcode, 15))) |
| 3608 | return false; |
| 3609 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3610 | // if registers<15> == '1' && InITBlock() && !LastInITBlock() then UNPREDICTABLE; |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 3611 | if (BitIsSet (registers, 15) && InITBlock() && !LastInITBlock()) |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3612 | return false; |
| 3613 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3614 | // if wback && registers<n> == '1' then UNPREDICTABLE; |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3615 | if (wback && BitIsSet (registers, n)) |
| 3616 | return false; |
| 3617 | |
| 3618 | break; |
| 3619 | |
| 3620 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3621 | // n = UInt(Rn); registers = register_list; wback = (W == '1'); |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3622 | n = Bits32 (opcode, 19, 16); |
| 3623 | registers = Bits32 (opcode, 15, 0); |
| 3624 | wback = BitIsSet (opcode, 21); |
| 3625 | |
| 3626 | // if n == 15 || BitCount(registers) < 1 then UNPREDICTABLE; |
| 3627 | if ((n == 15) || (BitCount (registers) < 1)) |
| 3628 | return false; |
| 3629 | |
| 3630 | break; |
| 3631 | |
| 3632 | default: |
| 3633 | return false; |
| 3634 | } |
| 3635 | |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3636 | // address = R[n] - 4*BitCount(registers); |
| 3637 | |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3638 | int32_t offset = 0; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3639 | addr_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3640 | |
| 3641 | if (!success) |
| 3642 | return false; |
| 3643 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3644 | addr_t address = Rn - (addr_byte_size * BitCount (registers)); |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3645 | EmulateInstruction::Context context; |
| 3646 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 3647 | RegisterInfo dwarf_reg; |
| 3648 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, dwarf_reg); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3649 | context.SetRegisterPlusOffset (dwarf_reg, Rn - address); |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3650 | |
| 3651 | for (int i = 0; i < 14; ++i) |
| 3652 | { |
| 3653 | if (BitIsSet (registers, i)) |
| 3654 | { |
| 3655 | // R[i] = MemA[address,4]; address = address + 4; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3656 | context.SetRegisterPlusOffset (dwarf_reg, Rn - (address + offset)); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3657 | uint32_t data = MemARead (context, address + offset, addr_byte_size, 0, &success); |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3658 | if (!success) |
| 3659 | return false; |
| 3660 | |
| 3661 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + i, data)) |
| 3662 | return false; |
| 3663 | |
| 3664 | offset += addr_byte_size; |
| 3665 | } |
| 3666 | } |
| 3667 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3668 | // if registers<15> == '1' then |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3669 | // LoadWritePC(MemA[address,4]); |
| 3670 | if (BitIsSet (registers, 15)) |
| 3671 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3672 | context.SetRegisterPlusOffset (dwarf_reg, offset); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3673 | uint32_t data = MemARead (context, address + offset, addr_byte_size, 0, &success); |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3674 | if (!success) |
| 3675 | return false; |
Johnny Chen | e62b50d | 2011-02-09 22:02:17 +0000 | [diff] [blame] | 3676 | // In ARMv5T and above, this is an interworking branch. |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 3677 | if (!LoadWritePC(context, data)) |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3678 | return false; |
| 3679 | } |
| 3680 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3681 | // if wback && registers<n> == '0' then R[n] = R[n] - 4*BitCount(registers); |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3682 | if (wback && BitIsClear (registers, n)) |
| 3683 | { |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3684 | if (!success) |
| 3685 | return false; |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3686 | |
| 3687 | offset = (addr_byte_size * BitCount (registers)) * -1; |
| 3688 | context.type = EmulateInstruction::eContextAdjustBaseRegister; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3689 | context.SetImmediateSigned (offset); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3690 | addr_t addr = Rn + offset; |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3691 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, addr)) |
| 3692 | return false; |
| 3693 | } |
| 3694 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3695 | // if wback && registers<n> == '1' then R[n] = bits(32) UNKNOWN; // Only possible for encoding A1 |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3696 | if (wback && BitIsSet (registers, n)) |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3697 | return WriteBits32Unknown (n); |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3698 | } |
| 3699 | return true; |
| 3700 | } |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3701 | |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3702 | // LDMIB loads multiple registers from consecutive memory locations using an address from a base register. The |
| 3703 | // consecutive memory locations start just above this address, and thea ddress of the last of those locations can |
| 3704 | // optinoally be written back to the base register. |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3705 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3706 | EmulateInstructionARM::EmulateLDMIB (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3707 | { |
| 3708 | #if 0 |
| 3709 | if ConditionPassed() then |
| 3710 | EncodingSpecificOperations(); |
| 3711 | address = R[n] + 4; |
| 3712 | |
| 3713 | for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3714 | if registers<i> == '1' then |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3715 | R[i] = MemA[address,4]; address = address + 4; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3716 | if registers<15> == '1' then |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3717 | LoadWritePC(MemA[address,4]); |
| 3718 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3719 | if wback && registers<n> == '0' then R[n] = R[n] + 4*BitCount(registers); |
| 3720 | if wback && registers<n> == '1' then R[n] = bits(32) UNKNOWN; |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3721 | #endif |
| 3722 | |
| 3723 | bool success = false; |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3724 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3725 | if (ConditionPassed(opcode)) |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3726 | { |
| 3727 | uint32_t n; |
| 3728 | uint32_t registers = 0; |
| 3729 | bool wback; |
| 3730 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 3731 | switch (encoding) |
| 3732 | { |
| 3733 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3734 | // n = UInt(Rn); registers = register_list; wback = (W == '1'); |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3735 | n = Bits32 (opcode, 19, 16); |
| 3736 | registers = Bits32 (opcode, 15, 0); |
| 3737 | wback = BitIsSet (opcode, 21); |
| 3738 | |
| 3739 | // if n == 15 || BitCount(registers) < 1 then UNPREDICTABLE; |
| 3740 | if ((n == 15) || (BitCount (registers) < 1)) |
| 3741 | return false; |
| 3742 | |
| 3743 | break; |
| 3744 | default: |
| 3745 | return false; |
| 3746 | } |
| 3747 | // address = R[n] + 4; |
| 3748 | |
| 3749 | int32_t offset = 0; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3750 | addr_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3751 | |
| 3752 | if (!success) |
| 3753 | return false; |
| 3754 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3755 | addr_t address = Rn + addr_byte_size; |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3756 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3757 | EmulateInstruction::Context context; |
| 3758 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 3759 | RegisterInfo dwarf_reg; |
| 3760 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, dwarf_reg); |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3761 | context.SetRegisterPlusOffset (dwarf_reg, offset); |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3762 | |
| 3763 | for (int i = 0; i < 14; ++i) |
| 3764 | { |
| 3765 | if (BitIsSet (registers, i)) |
| 3766 | { |
| 3767 | // R[i] = MemA[address,4]; address = address + 4; |
| 3768 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3769 | context.SetRegisterPlusOffset (dwarf_reg, offset + addr_byte_size); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3770 | uint32_t data = MemARead (context, address + offset, addr_byte_size, 0, &success); |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3771 | if (!success) |
| 3772 | return false; |
| 3773 | |
| 3774 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + i, data)) |
| 3775 | return false; |
| 3776 | |
| 3777 | offset += addr_byte_size; |
| 3778 | } |
| 3779 | } |
| 3780 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3781 | // if registers<15> == '1' then |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3782 | // LoadWritePC(MemA[address,4]); |
| 3783 | if (BitIsSet (registers, 15)) |
| 3784 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3785 | context.SetRegisterPlusOffset (dwarf_reg, offset); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3786 | uint32_t data = MemARead (context, address + offset, addr_byte_size, 0, &success); |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3787 | if (!success) |
| 3788 | return false; |
Johnny Chen | e62b50d | 2011-02-09 22:02:17 +0000 | [diff] [blame] | 3789 | // In ARMv5T and above, this is an interworking branch. |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 3790 | if (!LoadWritePC(context, data)) |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3791 | return false; |
| 3792 | } |
| 3793 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3794 | // if wback && registers<n> == '0' then R[n] = R[n] + 4*BitCount(registers); |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3795 | if (wback && BitIsClear (registers, n)) |
| 3796 | { |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3797 | if (!success) |
| 3798 | return false; |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3799 | |
| 3800 | offset = addr_byte_size * BitCount (registers); |
| 3801 | context.type = EmulateInstruction::eContextAdjustBaseRegister; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3802 | context.SetImmediateSigned (offset); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3803 | addr_t addr = Rn + offset; |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3804 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, addr)) |
| 3805 | return false; |
| 3806 | } |
| 3807 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3808 | // if wback && registers<n> == '1' then R[n] = bits(32) UNKNOWN; // Only possible for encoding A1 |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3809 | if (wback && BitIsSet (registers, n)) |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3810 | return WriteBits32Unknown (n); |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3811 | } |
| 3812 | return true; |
| 3813 | } |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3814 | |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3815 | // Load Register (immediate) calculates an address from a base register value and |
| 3816 | // an immediate offset, loads a word from memory, and writes to a register. |
| 3817 | // LDR (immediate, Thumb) |
| 3818 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3819 | EmulateInstructionARM::EmulateLDRRtRnImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3820 | { |
| 3821 | #if 0 |
| 3822 | // ARM pseudo code... |
| 3823 | if (ConditionPassed()) |
| 3824 | { |
| 3825 | EncodingSpecificOperations(); NullCheckIfThumbEE(15); |
| 3826 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 3827 | address = if index then offset_addr else R[n]; |
| 3828 | data = MemU[address,4]; |
| 3829 | if wback then R[n] = offset_addr; |
| 3830 | if t == 15 then |
| 3831 | if address<1:0> == '00' then LoadWritePC(data); else UNPREDICTABLE; |
| 3832 | elsif UnalignedSupport() || address<1:0> = '00' then |
| 3833 | R[t] = data; |
| 3834 | else R[t] = bits(32) UNKNOWN; // Can only apply before ARMv7 |
| 3835 | } |
| 3836 | #endif |
| 3837 | |
| 3838 | bool success = false; |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3839 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3840 | if (ConditionPassed(opcode)) |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3841 | { |
| 3842 | uint32_t Rt; // the destination register |
| 3843 | uint32_t Rn; // the base register |
| 3844 | uint32_t imm32; // the immediate offset used to form the address |
| 3845 | addr_t offset_addr; // the offset address |
| 3846 | addr_t address; // the calculated address |
| 3847 | uint32_t data; // the literal data value from memory load |
| 3848 | bool add, index, wback; |
| 3849 | switch (encoding) { |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3850 | case eEncodingT1: |
Caroline Tice | 55e569e | 2011-04-13 21:49:04 +0000 | [diff] [blame] | 3851 | Rt = Bits32(opcode, 2, 0); |
| 3852 | Rn = Bits32(opcode, 5, 3); |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3853 | imm32 = Bits32(opcode, 10, 6) << 2; // imm32 = ZeroExtend(imm5:'00', 32); |
| 3854 | // index = TRUE; add = TRUE; wback = FALSE |
| 3855 | add = true; |
| 3856 | index = true; |
| 3857 | wback = false; |
| 3858 | |
| 3859 | break; |
| 3860 | |
| 3861 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3862 | // t = UInt(Rt); n = 13; imm32 = ZeroExtend(imm8:'00', 32); |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3863 | Rt = Bits32 (opcode, 10, 8); |
| 3864 | Rn = 13; |
| 3865 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 3866 | |
| 3867 | // index = TRUE; add = TRUE; wback = FALSE; |
| 3868 | index = true; |
| 3869 | add = true; |
| 3870 | wback = false; |
| 3871 | |
| 3872 | break; |
| 3873 | |
| 3874 | case eEncodingT3: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3875 | // if Rn == '1111' then SEE LDR (literal); |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3876 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 3877 | Rt = Bits32 (opcode, 15, 12); |
| 3878 | Rn = Bits32 (opcode, 19, 16); |
| 3879 | imm32 = Bits32 (opcode, 11, 0); |
| 3880 | |
| 3881 | // index = TRUE; add = TRUE; wback = FALSE; |
| 3882 | index = true; |
| 3883 | add = true; |
| 3884 | wback = false; |
| 3885 | |
| 3886 | // if t == 15 && InITBlock() && !LastInITBlock() then UNPREDICTABLE; |
| 3887 | if ((Rt == 15) && InITBlock() && !LastInITBlock()) |
| 3888 | return false; |
| 3889 | |
| 3890 | break; |
| 3891 | |
| 3892 | case eEncodingT4: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3893 | // if Rn == '1111' then SEE LDR (literal); |
| 3894 | // if P == '1' && U == '1' && W == '0' then SEE LDRT; |
| 3895 | // if Rn == '1101' && P == '0' && U == '1' && W == '1' && imm8 == '00000100' then SEE POP; |
| 3896 | // if P == '0' && W == '0' then UNDEFINED; |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3897 | if (BitIsClear (opcode, 10) && BitIsClear (opcode, 8)) |
| 3898 | return false; |
| 3899 | |
| 3900 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm8, 32); |
| 3901 | Rt = Bits32 (opcode, 15, 12); |
| 3902 | Rn = Bits32 (opcode, 19, 16); |
| 3903 | imm32 = Bits32 (opcode, 7, 0); |
| 3904 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3905 | // index = (P == '1'); add = (U == '1'); wback = (W == '1'); |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3906 | index = BitIsSet (opcode, 10); |
| 3907 | add = BitIsSet (opcode, 9); |
| 3908 | wback = BitIsSet (opcode, 8); |
| 3909 | |
| 3910 | // if (wback && n == t) || (t == 15 && InITBlock() && !LastInITBlock()) then UNPREDICTABLE; |
| 3911 | if ((wback && (Rn == Rt)) || ((Rt == 15) && InITBlock() && !LastInITBlock())) |
| 3912 | return false; |
| 3913 | |
| 3914 | break; |
| 3915 | |
| 3916 | default: |
| 3917 | return false; |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3918 | } |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3919 | uint32_t base = ReadCoreReg (Rn, &success); |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3920 | if (!success) |
| 3921 | return false; |
| 3922 | if (add) |
| 3923 | offset_addr = base + imm32; |
| 3924 | else |
| 3925 | offset_addr = base - imm32; |
| 3926 | |
| 3927 | address = (index ? offset_addr : base); |
| 3928 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 3929 | RegisterInfo base_reg; |
| 3930 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + Rn, base_reg); |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3931 | if (wback) |
| 3932 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3933 | EmulateInstruction::Context ctx; |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3934 | ctx.type = EmulateInstruction::eContextAdjustBaseRegister; |
| 3935 | ctx.SetRegisterPlusOffset (base_reg, (int32_t) (offset_addr - base)); |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3936 | |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3937 | if (!WriteRegisterUnsigned (ctx, eRegisterKindDWARF, dwarf_r0 + Rn, offset_addr)) |
| 3938 | return false; |
| 3939 | } |
| 3940 | |
| 3941 | // Prepare to write to the Rt register. |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3942 | EmulateInstruction::Context context; |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3943 | context.type = EmulateInstruction::eContextRegisterLoad; |
| 3944 | context.SetRegisterPlusOffset (base_reg, (int32_t) (offset_addr - base)); |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3945 | |
| 3946 | // Read memory from the address. |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3947 | data = MemURead(context, address, 4, 0, &success); |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3948 | if (!success) |
| 3949 | return false; |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3950 | |
| 3951 | if (Rt == 15) |
| 3952 | { |
| 3953 | if (Bits32(address, 1, 0) == 0) |
| 3954 | { |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 3955 | if (!LoadWritePC(context, data)) |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3956 | return false; |
| 3957 | } |
| 3958 | else |
| 3959 | return false; |
| 3960 | } |
| 3961 | else if (UnalignedSupport() || Bits32(address, 1, 0) == 0) |
| 3962 | { |
| 3963 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + Rt, data)) |
| 3964 | return false; |
| 3965 | } |
| 3966 | else |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3967 | WriteBits32Unknown (Rt); |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3968 | } |
| 3969 | return true; |
| 3970 | } |
| 3971 | |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 3972 | // STM (Store Multiple Increment After) stores multiple registers to consecutive memory locations using an address |
| 3973 | // from a base register. The consecutive memory locations start at this address, and teh address just above the last |
| 3974 | // of those locations can optionally be written back to the base register. |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3975 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3976 | EmulateInstructionARM::EmulateSTM (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3977 | { |
| 3978 | #if 0 |
| 3979 | if ConditionPassed() then |
| 3980 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 3981 | address = R[n]; |
| 3982 | |
| 3983 | for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3984 | if registers<i> == '1' then |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3985 | if i == n && wback && i != LowestSetBit(registers) then |
| 3986 | MemA[address,4] = bits(32) UNKNOWN; // Only possible for encodings T1 and A1 |
| 3987 | else |
| 3988 | MemA[address,4] = R[i]; |
| 3989 | address = address + 4; |
| 3990 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3991 | if registers<15> == '1' then // Only possible for encoding A1 |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3992 | MemA[address,4] = PCStoreValue(); |
| 3993 | if wback then R[n] = R[n] + 4*BitCount(registers); |
| 3994 | #endif |
| 3995 | |
| 3996 | bool success = false; |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3997 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3998 | if (ConditionPassed(opcode)) |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3999 | { |
| 4000 | uint32_t n; |
| 4001 | uint32_t registers = 0; |
| 4002 | bool wback; |
| 4003 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 4004 | |
| 4005 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 4006 | switch (encoding) |
| 4007 | { |
| 4008 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4009 | // n = UInt(Rn); registers = '00000000':register_list; wback = TRUE; |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 4010 | n = Bits32 (opcode, 10, 8); |
| 4011 | registers = Bits32 (opcode, 7, 0); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4012 | registers = registers & 0x00ff; // Make sure the top 8 bits are zeros. |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 4013 | wback = true; |
| 4014 | |
| 4015 | // if BitCount(registers) < 1 then UNPREDICTABLE; |
| 4016 | if (BitCount (registers) < 1) |
| 4017 | return false; |
| 4018 | |
| 4019 | break; |
| 4020 | |
| 4021 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4022 | // n = UInt(Rn); registers = '0':M:'0':register_list; wback = (W == '1'); |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 4023 | n = Bits32 (opcode, 19, 16); |
| 4024 | registers = Bits32 (opcode, 15, 0); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4025 | registers = registers & 0x5fff; // Make sure bits 15 & 13 are zeros. |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 4026 | wback = BitIsSet (opcode, 21); |
| 4027 | |
| 4028 | // if n == 15 || BitCount(registers) < 2 then UNPREDICTABLE; |
| 4029 | if ((n == 15) || (BitCount (registers) < 2)) |
| 4030 | return false; |
| 4031 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4032 | // if wback && registers<n> == '1' then UNPREDICTABLE; |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 4033 | if (wback && BitIsSet (registers, n)) |
| 4034 | return false; |
| 4035 | |
| 4036 | break; |
| 4037 | |
| 4038 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4039 | // n = UInt(Rn); registers = register_list; wback = (W == '1'); |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 4040 | n = Bits32 (opcode, 19, 16); |
| 4041 | registers = Bits32 (opcode, 15, 0); |
| 4042 | wback = BitIsSet (opcode, 21); |
| 4043 | |
| 4044 | // if n == 15 || BitCount(registers) < 1 then UNPREDICTABLE; |
| 4045 | if ((n == 15) || (BitCount (registers) < 1)) |
| 4046 | return false; |
| 4047 | |
| 4048 | break; |
| 4049 | |
| 4050 | default: |
| 4051 | return false; |
| 4052 | } |
| 4053 | |
| 4054 | // address = R[n]; |
| 4055 | int32_t offset = 0; |
| 4056 | const addr_t address = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 4057 | if (!success) |
| 4058 | return false; |
| 4059 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 4060 | EmulateInstruction::Context context; |
| 4061 | context.type = EmulateInstruction::eContextRegisterStore; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 4062 | RegisterInfo base_reg; |
| 4063 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 4064 | |
| 4065 | // for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4066 | int lowest_set_bit = 14; |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 4067 | for (int i = 0; i < 14; ++i) |
| 4068 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4069 | // if registers<i> == '1' then |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 4070 | if (BitIsSet (registers, i)) |
| 4071 | { |
| 4072 | if (i < lowest_set_bit) |
| 4073 | lowest_set_bit = i; |
| 4074 | // if i == n && wback && i != LowestSetBit(registers) then |
| 4075 | if ((i == n) && wback && (i != lowest_set_bit)) |
| 4076 | // MemA[address,4] = bits(32) UNKNOWN; // Only possible for encodings T1 and A1 |
| 4077 | WriteBits32UnknownToMemory (address + offset); |
| 4078 | else |
| 4079 | { |
| 4080 | // MemA[address,4] = R[i]; |
| 4081 | uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + i, 0, &success); |
| 4082 | if (!success) |
| 4083 | return false; |
| 4084 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 4085 | RegisterInfo data_reg; |
| 4086 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + i, data_reg); |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 4087 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, offset); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 4088 | if (!MemAWrite (context, address + offset, data, addr_byte_size)) |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 4089 | return false; |
| 4090 | } |
| 4091 | |
| 4092 | // address = address + 4; |
| 4093 | offset += addr_byte_size; |
| 4094 | } |
| 4095 | } |
| 4096 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4097 | // if registers<15> == '1' then // Only possible for encoding A1 |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 4098 | // MemA[address,4] = PCStoreValue(); |
| 4099 | if (BitIsSet (registers, 15)) |
| 4100 | { |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 4101 | RegisterInfo pc_reg; |
| 4102 | GetRegisterInfo (eRegisterKindDWARF, dwarf_pc, pc_reg); |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 4103 | context.SetRegisterPlusOffset (pc_reg, 8); |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 4104 | const uint32_t pc = ReadCoreReg (PC_REG, &success); |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 4105 | if (!success) |
| 4106 | return false; |
| 4107 | |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 4108 | if (!MemAWrite (context, address + offset, pc, addr_byte_size)) |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 4109 | return false; |
| 4110 | } |
| 4111 | |
| 4112 | // if wback then R[n] = R[n] + 4*BitCount(registers); |
| 4113 | if (wback) |
| 4114 | { |
| 4115 | offset = addr_byte_size * BitCount (registers); |
| 4116 | context.type = EmulateInstruction::eContextAdjustBaseRegister; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 4117 | context.SetImmediateSigned (offset); |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 4118 | addr_t data = address + offset; |
| 4119 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, data)) |
| 4120 | return false; |
| 4121 | } |
| 4122 | } |
| 4123 | return true; |
| 4124 | } |
| 4125 | |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4126 | // STMDA (Store Multiple Decrement After) stores multiple registers to consecutive memory locations using an address |
| 4127 | // from a base register. The consecutive memory locations end at this address, and the address just below the lowest |
| 4128 | // of those locations can optionally be written back to the base register. |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4129 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4130 | EmulateInstructionARM::EmulateSTMDA (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4131 | { |
| 4132 | #if 0 |
| 4133 | if ConditionPassed() then |
| 4134 | EncodingSpecificOperations(); |
| 4135 | address = R[n] - 4*BitCount(registers) + 4; |
| 4136 | |
| 4137 | for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4138 | if registers<i> == '1' then |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4139 | if i == n && wback && i != LowestSetBit(registers) then |
| 4140 | MemA[address,4] = bits(32) UNKNOWN; |
| 4141 | else |
| 4142 | MemA[address,4] = R[i]; |
| 4143 | address = address + 4; |
| 4144 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4145 | if registers<15> == '1' then |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4146 | MemA[address,4] = PCStoreValue(); |
| 4147 | |
| 4148 | if wback then R[n] = R[n] - 4*BitCount(registers); |
| 4149 | #endif |
| 4150 | |
| 4151 | bool success = false; |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4152 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4153 | if (ConditionPassed(opcode)) |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4154 | { |
| 4155 | uint32_t n; |
| 4156 | uint32_t registers = 0; |
| 4157 | bool wback; |
| 4158 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 4159 | |
| 4160 | // EncodingSpecificOperations(); |
| 4161 | switch (encoding) |
| 4162 | { |
| 4163 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4164 | // n = UInt(Rn); registers = register_list; wback = (W == '1'); |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4165 | n = Bits32 (opcode, 19, 16); |
| 4166 | registers = Bits32 (opcode, 15, 0); |
| 4167 | wback = BitIsSet (opcode, 21); |
| 4168 | |
| 4169 | // if n == 15 || BitCount(registers) < 1 then UNPREDICTABLE; |
| 4170 | if ((n == 15) || (BitCount (registers) < 1)) |
| 4171 | return false; |
| 4172 | break; |
| 4173 | default: |
| 4174 | return false; |
| 4175 | } |
| 4176 | |
| 4177 | // address = R[n] - 4*BitCount(registers) + 4; |
| 4178 | int32_t offset = 0; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4179 | addr_t Rn = ReadCoreReg (n, &success); |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4180 | if (!success) |
| 4181 | return false; |
| 4182 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4183 | addr_t address = Rn - (addr_byte_size * BitCount (registers)) + 4; |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4184 | |
| 4185 | EmulateInstruction::Context context; |
| 4186 | context.type = EmulateInstruction::eContextRegisterStore; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 4187 | RegisterInfo base_reg; |
| 4188 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4189 | |
| 4190 | // for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4191 | int lowest_bit_set = 14; |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4192 | for (int i = 0; i < 14; ++i) |
| 4193 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4194 | // if registers<i> == '1' then |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4195 | if (BitIsSet (registers, i)) |
| 4196 | { |
| 4197 | if (i < lowest_bit_set) |
| 4198 | lowest_bit_set = i; |
| 4199 | //if i == n && wback && i != LowestSetBit(registers) then |
| 4200 | if ((i == n) && wback && (i != lowest_bit_set)) |
| 4201 | // MemA[address,4] = bits(32) UNKNOWN; |
| 4202 | WriteBits32UnknownToMemory (address + offset); |
| 4203 | else |
| 4204 | { |
| 4205 | // MemA[address,4] = R[i]; |
| 4206 | uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + i, 0, &success); |
| 4207 | if (!success) |
| 4208 | return false; |
| 4209 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 4210 | RegisterInfo data_reg; |
| 4211 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + i, data_reg); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4212 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, Rn - (address + offset)); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 4213 | if (!MemAWrite (context, address + offset, data, addr_byte_size)) |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4214 | return false; |
| 4215 | } |
| 4216 | |
| 4217 | // address = address + 4; |
| 4218 | offset += addr_byte_size; |
| 4219 | } |
| 4220 | } |
| 4221 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4222 | // if registers<15> == '1' then |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4223 | // MemA[address,4] = PCStoreValue(); |
| 4224 | if (BitIsSet (registers, 15)) |
| 4225 | { |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 4226 | RegisterInfo pc_reg; |
| 4227 | GetRegisterInfo (eRegisterKindDWARF, dwarf_pc, pc_reg); |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4228 | context.SetRegisterPlusOffset (pc_reg, 8); |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 4229 | const uint32_t pc = ReadCoreReg (PC_REG, &success); |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4230 | if (!success) |
| 4231 | return false; |
| 4232 | |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 4233 | if (!MemAWrite (context, address + offset, pc, addr_byte_size)) |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4234 | return false; |
| 4235 | } |
| 4236 | |
| 4237 | // if wback then R[n] = R[n] - 4*BitCount(registers); |
| 4238 | if (wback) |
| 4239 | { |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4240 | offset = (addr_byte_size * BitCount (registers)) * -1; |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4241 | context.type = EmulateInstruction::eContextAdjustBaseRegister; |
| 4242 | context.SetImmediateSigned (offset); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4243 | addr_t data = Rn + offset; |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4244 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, data)) |
| 4245 | return false; |
| 4246 | } |
| 4247 | } |
| 4248 | return true; |
| 4249 | } |
| 4250 | |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4251 | // STMDB (Store Multiple Decrement Before) stores multiple registers to consecutive memory locations using an address |
| 4252 | // from a base register. The consecutive memory locations end just below this address, and the address of the first of |
| 4253 | // those locations can optionally be written back to the base register. |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4254 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4255 | EmulateInstructionARM::EmulateSTMDB (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4256 | { |
| 4257 | #if 0 |
| 4258 | if ConditionPassed() then |
| 4259 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 4260 | address = R[n] - 4*BitCount(registers); |
| 4261 | |
| 4262 | for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4263 | if registers<i> == '1' then |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4264 | if i == n && wback && i != LowestSetBit(registers) then |
| 4265 | MemA[address,4] = bits(32) UNKNOWN; // Only possible for encoding A1 |
| 4266 | else |
| 4267 | MemA[address,4] = R[i]; |
| 4268 | address = address + 4; |
| 4269 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4270 | if registers<15> == '1' then // Only possible for encoding A1 |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4271 | MemA[address,4] = PCStoreValue(); |
| 4272 | |
| 4273 | if wback then R[n] = R[n] - 4*BitCount(registers); |
| 4274 | #endif |
| 4275 | |
| 4276 | |
| 4277 | bool success = false; |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4278 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4279 | if (ConditionPassed(opcode)) |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4280 | { |
| 4281 | uint32_t n; |
| 4282 | uint32_t registers = 0; |
| 4283 | bool wback; |
| 4284 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 4285 | |
| 4286 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 4287 | switch (encoding) |
| 4288 | { |
| 4289 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4290 | // if W == '1' && Rn == '1101' then SEE PUSH; |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4291 | if ((BitIsSet (opcode, 21)) && (Bits32 (opcode, 19, 16) == 13)) |
| 4292 | { |
| 4293 | // See PUSH |
| 4294 | } |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4295 | // n = UInt(Rn); registers = '0':M:'0':register_list; wback = (W == '1'); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4296 | n = Bits32 (opcode, 19, 16); |
| 4297 | registers = Bits32 (opcode, 15, 0); |
| 4298 | registers = registers & 0x5fff; // Make sure bits 15 & 13 are zeros. |
| 4299 | wback = BitIsSet (opcode, 21); |
| 4300 | // if n == 15 || BitCount(registers) < 2 then UNPREDICTABLE; |
| 4301 | if ((n == 15) || BitCount (registers) < 2) |
| 4302 | return false; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4303 | // if wback && registers<n> == '1' then UNPREDICTABLE; |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4304 | if (wback && BitIsSet (registers, n)) |
| 4305 | return false; |
| 4306 | break; |
| 4307 | |
| 4308 | case eEncodingA1: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 4309 | // if W == '1' && Rn == '1101Õ && BitCount(register_list) >= 2 then SEE PUSH; |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4310 | if (BitIsSet (opcode, 21) && (Bits32 (opcode, 19, 16) == 13) && BitCount (Bits32 (opcode, 15, 0)) >= 2) |
| 4311 | { |
| 4312 | // See Push |
| 4313 | } |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4314 | // n = UInt(Rn); registers = register_list; wback = (W == '1'); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4315 | n = Bits32 (opcode, 19, 16); |
| 4316 | registers = Bits32 (opcode, 15, 0); |
| 4317 | wback = BitIsSet (opcode, 21); |
| 4318 | // if n == 15 || BitCount(registers) < 1 then UNPREDICTABLE; |
| 4319 | if ((n == 15) || BitCount (registers) < 1) |
| 4320 | return false; |
| 4321 | break; |
| 4322 | |
| 4323 | default: |
| 4324 | return false; |
| 4325 | } |
| 4326 | |
| 4327 | // address = R[n] - 4*BitCount(registers); |
| 4328 | |
| 4329 | int32_t offset = 0; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4330 | addr_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4331 | if (!success) |
| 4332 | return false; |
| 4333 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4334 | addr_t address = Rn - (addr_byte_size * BitCount (registers)); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4335 | |
| 4336 | EmulateInstruction::Context context; |
| 4337 | context.type = EmulateInstruction::eContextRegisterStore; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 4338 | RegisterInfo base_reg; |
| 4339 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4340 | |
| 4341 | // for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4342 | uint32_t lowest_set_bit = 14; |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4343 | for (int i = 0; i < 14; ++i) |
| 4344 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4345 | // if registers<i> == '1' then |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4346 | if (BitIsSet (registers, i)) |
| 4347 | { |
| 4348 | if (i < lowest_set_bit) |
| 4349 | lowest_set_bit = i; |
| 4350 | // if i == n && wback && i != LowestSetBit(registers) then |
| 4351 | if ((i == n) && wback && (i != lowest_set_bit)) |
| 4352 | // MemA[address,4] = bits(32) UNKNOWN; // Only possible for encoding A1 |
| 4353 | WriteBits32UnknownToMemory (address + offset); |
| 4354 | else |
| 4355 | { |
| 4356 | // MemA[address,4] = R[i]; |
| 4357 | uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + i, 0, &success); |
| 4358 | if (!success) |
| 4359 | return false; |
| 4360 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 4361 | RegisterInfo data_reg; |
| 4362 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + i, data_reg); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4363 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, Rn - (address + offset)); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 4364 | if (!MemAWrite (context, address + offset, data, addr_byte_size)) |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4365 | return false; |
| 4366 | } |
| 4367 | |
| 4368 | // address = address + 4; |
| 4369 | offset += addr_byte_size; |
| 4370 | } |
| 4371 | } |
| 4372 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4373 | // if registers<15> == '1' then // Only possible for encoding A1 |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4374 | // MemA[address,4] = PCStoreValue(); |
| 4375 | if (BitIsSet (registers, 15)) |
| 4376 | { |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 4377 | RegisterInfo pc_reg; |
| 4378 | GetRegisterInfo (eRegisterKindDWARF, dwarf_pc, pc_reg); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4379 | context.SetRegisterPlusOffset (pc_reg, 8); |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 4380 | const uint32_t pc = ReadCoreReg (PC_REG, &success); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4381 | if (!success) |
| 4382 | return false; |
| 4383 | |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 4384 | if (!MemAWrite (context, address + offset, pc, addr_byte_size)) |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4385 | return false; |
| 4386 | } |
| 4387 | |
| 4388 | // if wback then R[n] = R[n] - 4*BitCount(registers); |
| 4389 | if (wback) |
| 4390 | { |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4391 | offset = (addr_byte_size * BitCount (registers)) * -1; |
| 4392 | context.type = EmulateInstruction::eContextAdjustBaseRegister; |
| 4393 | context.SetImmediateSigned (offset); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4394 | addr_t data = Rn + offset; |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4395 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, data)) |
| 4396 | return false; |
| 4397 | } |
| 4398 | } |
| 4399 | return true; |
| 4400 | } |
| 4401 | |
| 4402 | // STMIB (Store Multiple Increment Before) stores multiple registers to consecutive memory locations using an address |
| 4403 | // from a base register. The consecutive memory locations start just above this address, and the address of the last |
| 4404 | // of those locations can optionally be written back to the base register. |
| 4405 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4406 | EmulateInstructionARM::EmulateSTMIB (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4407 | { |
| 4408 | #if 0 |
| 4409 | if ConditionPassed() then |
| 4410 | EncodingSpecificOperations(); |
| 4411 | address = R[n] + 4; |
| 4412 | |
| 4413 | for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4414 | if registers<i> == '1' then |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4415 | if i == n && wback && i != LowestSetBit(registers) then |
| 4416 | MemA[address,4] = bits(32) UNKNOWN; |
| 4417 | else |
| 4418 | MemA[address,4] = R[i]; |
| 4419 | address = address + 4; |
| 4420 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4421 | if registers<15> == '1' then |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4422 | MemA[address,4] = PCStoreValue(); |
| 4423 | |
| 4424 | if wback then R[n] = R[n] + 4*BitCount(registers); |
| 4425 | #endif |
| 4426 | |
| 4427 | bool success = false; |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4428 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4429 | if (ConditionPassed(opcode)) |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4430 | { |
| 4431 | uint32_t n; |
| 4432 | uint32_t registers = 0; |
| 4433 | bool wback; |
| 4434 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 4435 | |
| 4436 | // EncodingSpecificOperations(); |
| 4437 | switch (encoding) |
| 4438 | { |
| 4439 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4440 | // n = UInt(Rn); registers = register_list; wback = (W == '1'); |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4441 | n = Bits32 (opcode, 19, 16); |
| 4442 | registers = Bits32 (opcode, 15, 0); |
| 4443 | wback = BitIsSet (opcode, 21); |
| 4444 | |
| 4445 | // if n == 15 || BitCount(registers) < 1 then UNPREDICTABLE; |
| 4446 | if ((n == 15) && (BitCount (registers) < 1)) |
| 4447 | return false; |
| 4448 | break; |
| 4449 | default: |
| 4450 | return false; |
| 4451 | } |
| 4452 | // address = R[n] + 4; |
| 4453 | |
| 4454 | int32_t offset = 0; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4455 | addr_t Rn = ReadCoreReg (n, &success); |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4456 | if (!success) |
| 4457 | return false; |
| 4458 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4459 | addr_t address = Rn + addr_byte_size; |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4460 | |
| 4461 | EmulateInstruction::Context context; |
| 4462 | context.type = EmulateInstruction::eContextRegisterStore; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 4463 | RegisterInfo base_reg; |
| 4464 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4465 | |
| 4466 | uint32_t lowest_set_bit = 14; |
| 4467 | // for i = 0 to 14 |
| 4468 | for (int i = 0; i < 14; ++i) |
| 4469 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4470 | // if registers<i> == '1' then |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4471 | if (BitIsSet (registers, i)) |
| 4472 | { |
| 4473 | if (i < lowest_set_bit) |
| 4474 | lowest_set_bit = i; |
| 4475 | // if i == n && wback && i != LowestSetBit(registers) then |
| 4476 | if ((i == n) && wback && (i != lowest_set_bit)) |
| 4477 | // MemA[address,4] = bits(32) UNKNOWN; |
| 4478 | WriteBits32UnknownToMemory (address + offset); |
| 4479 | // else |
| 4480 | else |
| 4481 | { |
| 4482 | // MemA[address,4] = R[i]; |
| 4483 | uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + i, 0, &success); |
| 4484 | if (!success) |
| 4485 | return false; |
| 4486 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 4487 | RegisterInfo data_reg; |
| 4488 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + i, data_reg); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4489 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, offset + addr_byte_size); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 4490 | if (!MemAWrite (context, address + offset, data, addr_byte_size)) |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4491 | return false; |
| 4492 | } |
| 4493 | |
| 4494 | // address = address + 4; |
| 4495 | offset += addr_byte_size; |
| 4496 | } |
| 4497 | } |
| 4498 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4499 | // if registers<15> == '1' then |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4500 | // MemA[address,4] = PCStoreValue(); |
| 4501 | if (BitIsSet (registers, 15)) |
| 4502 | { |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 4503 | RegisterInfo pc_reg; |
| 4504 | GetRegisterInfo (eRegisterKindDWARF, dwarf_pc, pc_reg); |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4505 | context.SetRegisterPlusOffset (pc_reg, 8); |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 4506 | const uint32_t pc = ReadCoreReg (PC_REG, &success); |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4507 | if (!success) |
| 4508 | return false; |
| 4509 | |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 4510 | if (!MemAWrite (context, address + offset, pc, addr_byte_size)) |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4511 | return false; |
| 4512 | } |
| 4513 | |
| 4514 | // if wback then R[n] = R[n] + 4*BitCount(registers); |
| 4515 | if (wback) |
| 4516 | { |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4517 | offset = addr_byte_size * BitCount (registers); |
| 4518 | context.type = EmulateInstruction::eContextAdjustBaseRegister; |
| 4519 | context.SetImmediateSigned (offset); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4520 | addr_t data = Rn + offset; |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4521 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, data)) |
| 4522 | return false; |
| 4523 | } |
| 4524 | } |
| 4525 | return true; |
| 4526 | } |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4527 | |
| 4528 | // STR (store immediate) calcualtes an address from a base register value and an immediate offset, and stores a word |
| 4529 | // from a register to memory. It can use offset, post-indexed, or pre-indexed addressing. |
| 4530 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4531 | EmulateInstructionARM::EmulateSTRThumb (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4532 | { |
| 4533 | #if 0 |
| 4534 | if ConditionPassed() then |
| 4535 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 4536 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 4537 | address = if index then offset_addr else R[n]; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4538 | if UnalignedSupport() || address<1:0> == '00' then |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4539 | MemU[address,4] = R[t]; |
| 4540 | else // Can only occur before ARMv7 |
| 4541 | MemU[address,4] = bits(32) UNKNOWN; |
| 4542 | if wback then R[n] = offset_addr; |
| 4543 | #endif |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4544 | |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4545 | bool success = false; |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4546 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4547 | if (ConditionPassed(opcode)) |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4548 | { |
| 4549 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 4550 | |
| 4551 | uint32_t t; |
| 4552 | uint32_t n; |
| 4553 | uint32_t imm32; |
| 4554 | bool index; |
| 4555 | bool add; |
| 4556 | bool wback; |
| 4557 | // EncodingSpecificOperations (); NullCheckIfThumbEE(n); |
| 4558 | switch (encoding) |
| 4559 | { |
| 4560 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4561 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm5:'00', 32); |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4562 | t = Bits32 (opcode, 2, 0); |
| 4563 | n = Bits32 (opcode, 5, 3); |
| 4564 | imm32 = Bits32 (opcode, 10, 6) << 2; |
| 4565 | |
| 4566 | // index = TRUE; add = TRUE; wback = FALSE; |
| 4567 | index = true; |
| 4568 | add = false; |
| 4569 | wback = false; |
| 4570 | break; |
| 4571 | |
| 4572 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4573 | // t = UInt(Rt); n = 13; imm32 = ZeroExtend(imm8:'00', 32); |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4574 | t = Bits32 (opcode, 10, 8); |
| 4575 | n = 13; |
| 4576 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 4577 | |
| 4578 | // index = TRUE; add = TRUE; wback = FALSE; |
| 4579 | index = true; |
| 4580 | add = true; |
| 4581 | wback = false; |
| 4582 | break; |
| 4583 | |
| 4584 | case eEncodingT3: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4585 | // if Rn == '1111' then UNDEFINED; |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4586 | if (Bits32 (opcode, 19, 16) == 15) |
| 4587 | return false; |
| 4588 | |
| 4589 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 4590 | t = Bits32 (opcode, 15, 12); |
| 4591 | n = Bits32 (opcode, 19, 16); |
| 4592 | imm32 = Bits32 (opcode, 11, 0); |
| 4593 | |
| 4594 | // index = TRUE; add = TRUE; wback = FALSE; |
| 4595 | index = true; |
| 4596 | add = true; |
| 4597 | wback = false; |
| 4598 | |
| 4599 | // if t == 15 then UNPREDICTABLE; |
| 4600 | if (t == 15) |
| 4601 | return false; |
| 4602 | break; |
| 4603 | |
| 4604 | case eEncodingT4: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4605 | // if P == '1' && U == '1' && W == '0' then SEE STRT; |
| 4606 | // if Rn == '1101' && P == '1' && U == '0' && W == '1' && imm8 == '00000100' then SEE PUSH; |
| 4607 | // if Rn == '1111' || (P == '0' && W == '0') then UNDEFINED; |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4608 | if ((Bits32 (opcode, 19, 16) == 15) |
| 4609 | || (BitIsClear (opcode, 10) && BitIsClear (opcode, 8))) |
| 4610 | return false; |
| 4611 | |
| 4612 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm8, 32); |
| 4613 | t = Bits32 (opcode, 15, 12); |
| 4614 | n = Bits32 (opcode, 19, 16); |
| 4615 | imm32 = Bits32 (opcode, 7, 0); |
| 4616 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4617 | // index = (P == '1'); add = (U == '1'); wback = (W == '1'); |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4618 | index = BitIsSet (opcode, 10); |
| 4619 | add = BitIsSet (opcode, 9); |
| 4620 | wback = BitIsSet (opcode, 8); |
| 4621 | |
| 4622 | // if t == 15 || (wback && n == t) then UNPREDICTABLE; |
| 4623 | if ((t == 15) || (wback && (n == t))) |
| 4624 | return false; |
| 4625 | break; |
| 4626 | |
| 4627 | default: |
| 4628 | return false; |
| 4629 | } |
| 4630 | |
| 4631 | addr_t offset_addr; |
| 4632 | addr_t address; |
| 4633 | |
| 4634 | // offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 4635 | uint32_t base_address = ReadCoreReg (n, &success); |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4636 | if (!success) |
| 4637 | return false; |
| 4638 | |
| 4639 | if (add) |
| 4640 | offset_addr = base_address + imm32; |
| 4641 | else |
| 4642 | offset_addr = base_address - imm32; |
| 4643 | |
| 4644 | // address = if index then offset_addr else R[n]; |
| 4645 | if (index) |
| 4646 | address = offset_addr; |
| 4647 | else |
| 4648 | address = base_address; |
| 4649 | |
| 4650 | EmulateInstruction::Context context; |
| 4651 | context.type = eContextRegisterStore; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 4652 | RegisterInfo base_reg; |
| 4653 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4654 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4655 | // if UnalignedSupport() || address<1:0> == '00' then |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4656 | if (UnalignedSupport () || (BitIsClear (address, 1) && BitIsClear (address, 0))) |
| 4657 | { |
| 4658 | // MemU[address,4] = R[t]; |
| 4659 | uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + t, 0, &success); |
| 4660 | if (!success) |
| 4661 | return false; |
| 4662 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 4663 | RegisterInfo data_reg; |
| 4664 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + t, data_reg); |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4665 | int32_t offset = address - base_address; |
| 4666 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, offset); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 4667 | if (!MemUWrite (context, address, data, addr_byte_size)) |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4668 | return false; |
| 4669 | } |
| 4670 | else |
| 4671 | { |
| 4672 | // MemU[address,4] = bits(32) UNKNOWN; |
| 4673 | WriteBits32UnknownToMemory (address); |
| 4674 | } |
| 4675 | |
| 4676 | // if wback then R[n] = offset_addr; |
| 4677 | if (wback) |
| 4678 | { |
| 4679 | context.type = eContextRegisterLoad; |
| 4680 | context.SetAddress (offset_addr); |
| 4681 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 4682 | return false; |
| 4683 | } |
| 4684 | } |
| 4685 | return true; |
| 4686 | } |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4687 | |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4688 | // STR (Store Register) calculates an address from a base register value and an offset register value, stores a |
| 4689 | // word from a register to memory. The offset register value can optionally be shifted. |
| 4690 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4691 | EmulateInstructionARM::EmulateSTRRegister (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4692 | { |
| 4693 | #if 0 |
| 4694 | if ConditionPassed() then |
| 4695 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 4696 | offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 4697 | offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 4698 | address = if index then offset_addr else R[n]; |
| 4699 | if t == 15 then // Only possible for encoding A1 |
| 4700 | data = PCStoreValue(); |
| 4701 | else |
| 4702 | data = R[t]; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4703 | if UnalignedSupport() || address<1:0> == '00' || CurrentInstrSet() == InstrSet_ARM then |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4704 | MemU[address,4] = data; |
| 4705 | else // Can only occur before ARMv7 |
| 4706 | MemU[address,4] = bits(32) UNKNOWN; |
| 4707 | if wback then R[n] = offset_addr; |
| 4708 | #endif |
| 4709 | |
| 4710 | bool success = false; |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4711 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4712 | if (ConditionPassed(opcode)) |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4713 | { |
| 4714 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 4715 | |
| 4716 | uint32_t t; |
| 4717 | uint32_t n; |
| 4718 | uint32_t m; |
| 4719 | ARM_ShifterType shift_t; |
| 4720 | uint32_t shift_n; |
| 4721 | bool index; |
| 4722 | bool add; |
| 4723 | bool wback; |
| 4724 | |
| 4725 | // EncodingSpecificOperations (); NullCheckIfThumbEE(n); |
| 4726 | switch (encoding) |
| 4727 | { |
| 4728 | case eEncodingT1: |
| 4729 | // if CurrentInstrSet() == InstrSet_ThumbEE then SEE "Modified operation in ThumbEE"; |
| 4730 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 4731 | t = Bits32 (opcode, 2, 0); |
| 4732 | n = Bits32 (opcode, 5, 3); |
| 4733 | m = Bits32 (opcode, 8, 6); |
| 4734 | |
| 4735 | // index = TRUE; add = TRUE; wback = FALSE; |
| 4736 | index = true; |
| 4737 | add = true; |
| 4738 | wback = false; |
| 4739 | |
| 4740 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 4741 | shift_t = SRType_LSL; |
| 4742 | shift_n = 0; |
| 4743 | break; |
| 4744 | |
| 4745 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4746 | // if Rn == '1111' then UNDEFINED; |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4747 | if (Bits32 (opcode, 19, 16) == 15) |
| 4748 | return false; |
| 4749 | |
| 4750 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 4751 | t = Bits32 (opcode, 15, 12); |
| 4752 | n = Bits32 (opcode, 19, 16); |
| 4753 | m = Bits32 (opcode, 3, 0); |
| 4754 | |
| 4755 | // index = TRUE; add = TRUE; wback = FALSE; |
| 4756 | index = true; |
| 4757 | add = true; |
| 4758 | wback = false; |
| 4759 | |
| 4760 | // (shift_t, shift_n) = (SRType_LSL, UInt(imm2)); |
| 4761 | shift_t = SRType_LSL; |
| 4762 | shift_n = Bits32 (opcode, 5, 4); |
| 4763 | |
| 4764 | // if t == 15 || BadReg(m) then UNPREDICTABLE; |
| 4765 | if ((t == 15) || (BadReg (m))) |
| 4766 | return false; |
| 4767 | break; |
| 4768 | |
| 4769 | case eEncodingA1: |
| 4770 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4771 | // if P == '0' && W == '1' then SEE STRT; |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4772 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 4773 | t = Bits32 (opcode, 15, 12); |
| 4774 | n = Bits32 (opcode, 19, 16); |
| 4775 | m = Bits32 (opcode, 3, 0); |
| 4776 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4777 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4778 | index = BitIsSet (opcode, 24); |
| 4779 | add = BitIsSet (opcode, 23); |
| 4780 | wback = (BitIsClear (opcode, 24) || BitIsSet (opcode, 21)); |
| 4781 | |
| 4782 | // (shift_t, shift_n) = DecodeImmShift(type, imm5); |
| 4783 | uint32_t typ = Bits32 (opcode, 6, 5); |
| 4784 | uint32_t imm5 = Bits32 (opcode, 11, 7); |
| 4785 | shift_n = DecodeImmShift(typ, imm5, shift_t); |
| 4786 | |
| 4787 | // if m == 15 then UNPREDICTABLE; |
| 4788 | if (m == 15) |
| 4789 | return false; |
| 4790 | |
| 4791 | // if wback && (n == 15 || n == t) then UNPREDICTABLE; |
| 4792 | if (wback && ((n == 15) || (n == t))) |
| 4793 | return false; |
| 4794 | |
| 4795 | break; |
| 4796 | } |
| 4797 | default: |
| 4798 | return false; |
| 4799 | } |
| 4800 | |
| 4801 | addr_t offset_addr; |
| 4802 | addr_t address; |
| 4803 | int32_t offset = 0; |
| 4804 | |
| 4805 | addr_t base_address = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 4806 | if (!success) |
| 4807 | return false; |
| 4808 | |
| 4809 | uint32_t Rm_data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 4810 | if (!success) |
| 4811 | return false; |
| 4812 | |
| 4813 | // offset = Shift(R[m], shift_t, shift_n, APSR.C); |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 4814 | offset = Shift (Rm_data, shift_t, shift_n, APSR_C, &success); |
| 4815 | if (!success) |
| 4816 | return false; |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4817 | |
| 4818 | // offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 4819 | if (add) |
| 4820 | offset_addr = base_address + offset; |
| 4821 | else |
| 4822 | offset_addr = base_address - offset; |
| 4823 | |
| 4824 | // address = if index then offset_addr else R[n]; |
| 4825 | if (index) |
| 4826 | address = offset_addr; |
| 4827 | else |
| 4828 | address = base_address; |
| 4829 | |
| 4830 | uint32_t data; |
| 4831 | // if t == 15 then // Only possible for encoding A1 |
| 4832 | if (t == 15) |
| 4833 | // data = PCStoreValue(); |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 4834 | data = ReadCoreReg (PC_REG, &success); |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4835 | else |
| 4836 | // data = R[t]; |
| 4837 | data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + t, 0, &success); |
| 4838 | |
| 4839 | if (!success) |
| 4840 | return false; |
| 4841 | |
| 4842 | EmulateInstruction::Context context; |
| 4843 | context.type = eContextRegisterStore; |
| 4844 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4845 | // if UnalignedSupport() || address<1:0> == '00' || CurrentInstrSet() == InstrSet_ARM then |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4846 | if (UnalignedSupport () |
| 4847 | || (BitIsClear (address, 1) && BitIsClear (address, 0)) |
| 4848 | || CurrentInstrSet() == eModeARM) |
| 4849 | { |
| 4850 | // MemU[address,4] = data; |
| 4851 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 4852 | RegisterInfo base_reg; |
| 4853 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4854 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 4855 | RegisterInfo data_reg; |
| 4856 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + t, data_reg); |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4857 | |
| 4858 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - base_address); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 4859 | if (!MemUWrite (context, address, data, addr_byte_size)) |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4860 | return false; |
| 4861 | |
| 4862 | } |
| 4863 | else |
| 4864 | // MemU[address,4] = bits(32) UNKNOWN; |
| 4865 | WriteBits32UnknownToMemory (address); |
| 4866 | |
| 4867 | // if wback then R[n] = offset_addr; |
| 4868 | if (wback) |
| 4869 | { |
| 4870 | context.type = eContextRegisterLoad; |
| 4871 | context.SetAddress (offset_addr); |
| 4872 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 4873 | return false; |
| 4874 | } |
| 4875 | |
| 4876 | } |
| 4877 | return true; |
| 4878 | } |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4879 | |
| 4880 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4881 | EmulateInstructionARM::EmulateSTRBThumb (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4882 | { |
| 4883 | #if 0 |
| 4884 | if ConditionPassed() then |
| 4885 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 4886 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 4887 | address = if index then offset_addr else R[n]; |
| 4888 | MemU[address,1] = R[t]<7:0>; |
| 4889 | if wback then R[n] = offset_addr; |
| 4890 | #endif |
| 4891 | |
| 4892 | |
| 4893 | bool success = false; |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4894 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4895 | if (ConditionPassed(opcode)) |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4896 | { |
| 4897 | uint32_t t; |
| 4898 | uint32_t n; |
| 4899 | uint32_t imm32; |
| 4900 | bool index; |
| 4901 | bool add; |
| 4902 | bool wback; |
| 4903 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 4904 | switch (encoding) |
| 4905 | { |
| 4906 | case eEncodingT1: |
| 4907 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm5, 32); |
| 4908 | t = Bits32 (opcode, 2, 0); |
| 4909 | n = Bits32 (opcode, 5, 3); |
| 4910 | imm32 = Bits32 (opcode, 10, 6); |
| 4911 | |
| 4912 | // index = TRUE; add = TRUE; wback = FALSE; |
| 4913 | index = true; |
| 4914 | add = true; |
| 4915 | wback = false; |
| 4916 | break; |
| 4917 | |
| 4918 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4919 | // if Rn == '1111' then UNDEFINED; |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4920 | if (Bits32 (opcode, 19, 16) == 15) |
| 4921 | return false; |
| 4922 | |
| 4923 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 4924 | t = Bits32 (opcode, 15, 12); |
| 4925 | n = Bits32 (opcode, 19, 16); |
| 4926 | imm32 = Bits32 (opcode, 11, 0); |
| 4927 | |
| 4928 | // index = TRUE; add = TRUE; wback = FALSE; |
| 4929 | index = true; |
| 4930 | add = true; |
| 4931 | wback = false; |
| 4932 | |
| 4933 | // if BadReg(t) then UNPREDICTABLE; |
| 4934 | if (BadReg (t)) |
| 4935 | return false; |
| 4936 | break; |
| 4937 | |
| 4938 | case eEncodingT3: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4939 | // if P == '1' && U == '1' && W == '0' then SEE STRBT; |
| 4940 | // if Rn == '1111' || (P == '0' && W == '0') then UNDEFINED; |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4941 | if (Bits32 (opcode, 19, 16) == 15) |
| 4942 | return false; |
| 4943 | |
| 4944 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm8, 32); |
| 4945 | t = Bits32 (opcode, 15, 12); |
| 4946 | n = Bits32 (opcode, 19, 16); |
| 4947 | imm32 = Bits32 (opcode, 7, 0); |
| 4948 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4949 | // index = (P == '1'); add = (U == '1'); wback = (W == '1'); |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4950 | index = BitIsSet (opcode, 10); |
| 4951 | add = BitIsSet (opcode, 9); |
| 4952 | wback = BitIsSet (opcode, 8); |
| 4953 | |
| 4954 | // if BadReg(t) || (wback && n == t) then UNPREDICTABLE |
| 4955 | if ((BadReg (t)) || (wback && (n == t))) |
| 4956 | return false; |
| 4957 | break; |
| 4958 | |
| 4959 | default: |
| 4960 | return false; |
| 4961 | } |
| 4962 | |
| 4963 | addr_t offset_addr; |
| 4964 | addr_t address; |
| 4965 | addr_t base_address = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 4966 | if (!success) |
| 4967 | return false; |
| 4968 | |
| 4969 | // offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 4970 | if (add) |
| 4971 | offset_addr = base_address + imm32; |
| 4972 | else |
| 4973 | offset_addr = base_address - imm32; |
| 4974 | |
| 4975 | // address = if index then offset_addr else R[n]; |
| 4976 | if (index) |
| 4977 | address = offset_addr; |
| 4978 | else |
| 4979 | address = base_address; |
| 4980 | |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 4981 | // MemU[address,1] = R[t]<7:0> |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 4982 | RegisterInfo base_reg; |
| 4983 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4984 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 4985 | RegisterInfo data_reg; |
| 4986 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + t, data_reg); |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4987 | |
| 4988 | EmulateInstruction::Context context; |
| 4989 | context.type = eContextRegisterStore; |
| 4990 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - base_address); |
| 4991 | |
| 4992 | uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + t, 0, &success); |
| 4993 | if (!success) |
| 4994 | return false; |
| 4995 | |
| 4996 | data = Bits32 (data, 7, 0); |
| 4997 | |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 4998 | if (!MemUWrite (context, address, data, 1)) |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4999 | return false; |
| 5000 | |
| 5001 | // if wback then R[n] = offset_addr; |
| 5002 | if (wback) |
| 5003 | { |
| 5004 | context.type = eContextRegisterLoad; |
| 5005 | context.SetAddress (offset_addr); |
| 5006 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 5007 | return false; |
| 5008 | } |
| 5009 | |
| 5010 | } |
| 5011 | |
| 5012 | return true; |
| 5013 | } |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 5014 | |
| 5015 | // STRH (register) calculates an address from a base register value and an offset register value, and stores a |
| 5016 | // halfword from a register to memory. The offset register alue can be shifted left by 0, 1, 2, or 3 bits. |
| 5017 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5018 | EmulateInstructionARM::EmulateSTRHRegister (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 5019 | { |
| 5020 | #if 0 |
| 5021 | if ConditionPassed() then |
| 5022 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 5023 | offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 5024 | offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 5025 | address = if index then offset_addr else R[n]; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5026 | if UnalignedSupport() || address<0> == '0' then |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 5027 | MemU[address,2] = R[t]<15:0>; |
| 5028 | else // Can only occur before ARMv7 |
| 5029 | MemU[address,2] = bits(16) UNKNOWN; |
| 5030 | if wback then R[n] = offset_addr; |
| 5031 | #endif |
| 5032 | |
| 5033 | bool success = false; |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 5034 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5035 | if (ConditionPassed(opcode)) |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 5036 | { |
| 5037 | uint32_t t; |
| 5038 | uint32_t n; |
| 5039 | uint32_t m; |
| 5040 | bool index; |
| 5041 | bool add; |
| 5042 | bool wback; |
| 5043 | ARM_ShifterType shift_t; |
| 5044 | uint32_t shift_n; |
| 5045 | |
| 5046 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 5047 | switch (encoding) |
| 5048 | { |
| 5049 | case eEncodingT1: |
| 5050 | // if CurrentInstrSet() == InstrSet_ThumbEE then SEE "Modified operation in ThumbEE"; |
| 5051 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 5052 | t = Bits32 (opcode, 2, 0); |
| 5053 | n = Bits32 (opcode, 5, 3); |
| 5054 | m = Bits32 (opcode, 8, 6); |
| 5055 | |
| 5056 | // index = TRUE; add = TRUE; wback = FALSE; |
| 5057 | index = true; |
| 5058 | add = true; |
| 5059 | wback = false; |
| 5060 | |
| 5061 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 5062 | shift_t = SRType_LSL; |
| 5063 | shift_n = 0; |
| 5064 | |
| 5065 | break; |
| 5066 | |
| 5067 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5068 | // if Rn == '1111' then UNDEFINED; |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 5069 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 5070 | t = Bits32 (opcode, 15, 12); |
| 5071 | n = Bits32 (opcode, 19, 16); |
| 5072 | m = Bits32 (opcode, 3, 0); |
| 5073 | if (n == 15) |
| 5074 | return false; |
| 5075 | |
| 5076 | // index = TRUE; add = TRUE; wback = FALSE; |
| 5077 | index = true; |
| 5078 | add = true; |
| 5079 | wback = false; |
| 5080 | |
| 5081 | // (shift_t, shift_n) = (SRType_LSL, UInt(imm2)); |
| 5082 | shift_t = SRType_LSL; |
| 5083 | shift_n = Bits32 (opcode, 5, 4); |
| 5084 | |
| 5085 | // if BadReg(t) || BadReg(m) then UNPREDICTABLE; |
| 5086 | if (BadReg (t) || BadReg (m)) |
| 5087 | return false; |
| 5088 | |
| 5089 | break; |
| 5090 | |
| 5091 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5092 | // if P == '0' && W == '1' then SEE STRHT; |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 5093 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 5094 | t = Bits32 (opcode, 15, 12); |
| 5095 | n = Bits32 (opcode, 19, 16); |
| 5096 | m = Bits32 (opcode, 3, 0); |
| 5097 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5098 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 5099 | index = BitIsSet (opcode, 24); |
| 5100 | add = BitIsSet (opcode, 23); |
| 5101 | wback = (BitIsClear (opcode, 24) || BitIsSet (opcode, 21)); |
| 5102 | |
| 5103 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 5104 | shift_t = SRType_LSL; |
| 5105 | shift_n = 0; |
| 5106 | |
| 5107 | // if t == 15 || m == 15 then UNPREDICTABLE; |
| 5108 | if ((t == 15) || (m == 15)) |
| 5109 | return false; |
| 5110 | |
| 5111 | // if wback && (n == 15 || n == t) then UNPREDICTABLE; |
| 5112 | if (wback && ((n == 15) || (n == t))) |
| 5113 | return false; |
| 5114 | |
| 5115 | break; |
| 5116 | |
| 5117 | default: |
| 5118 | return false; |
| 5119 | } |
| 5120 | |
| 5121 | uint32_t Rm = ReadCoreReg (m, &success); |
| 5122 | if (!success) |
| 5123 | return false; |
| 5124 | |
| 5125 | uint32_t Rn = ReadCoreReg (n, &success); |
| 5126 | if (!success) |
| 5127 | return false; |
| 5128 | |
| 5129 | // offset = Shift(R[m], shift_t, shift_n, APSR.C); |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 5130 | uint32_t offset = Shift (Rm, shift_t, shift_n, APSR_C, &success); |
| 5131 | if (!success) |
| 5132 | return false; |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 5133 | |
| 5134 | // offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 5135 | addr_t offset_addr; |
| 5136 | if (add) |
| 5137 | offset_addr = Rn + offset; |
| 5138 | else |
| 5139 | offset_addr = Rn - offset; |
| 5140 | |
| 5141 | // address = if index then offset_addr else R[n]; |
| 5142 | addr_t address; |
| 5143 | if (index) |
| 5144 | address = offset_addr; |
| 5145 | else |
| 5146 | address = Rn; |
| 5147 | |
| 5148 | EmulateInstruction::Context context; |
| 5149 | context.type = eContextRegisterStore; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 5150 | RegisterInfo base_reg; |
| 5151 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
| 5152 | RegisterInfo offset_reg; |
| 5153 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + m, offset_reg); |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 5154 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5155 | // if UnalignedSupport() || address<0> == '0' then |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 5156 | if (UnalignedSupport() || BitIsClear (address, 0)) |
| 5157 | { |
| 5158 | // MemU[address,2] = R[t]<15:0>; |
| 5159 | uint32_t Rt = ReadCoreReg (t, &success); |
| 5160 | if (!success) |
| 5161 | return false; |
| 5162 | |
| 5163 | EmulateInstruction::Context context; |
| 5164 | context.type = eContextRegisterStore; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 5165 | RegisterInfo base_reg; |
| 5166 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
| 5167 | RegisterInfo offset_reg; |
| 5168 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + m, offset_reg); |
| 5169 | RegisterInfo data_reg; |
| 5170 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + t, data_reg); |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 5171 | context.SetRegisterToRegisterPlusIndirectOffset (base_reg, offset_reg, data_reg); |
| 5172 | |
| 5173 | if (!MemUWrite (context, address, Bits32 (Rt, 15, 0), 2)) |
| 5174 | return false; |
| 5175 | } |
| 5176 | else // Can only occur before ARMv7 |
| 5177 | { |
| 5178 | // MemU[address,2] = bits(16) UNKNOWN; |
| 5179 | } |
| 5180 | |
| 5181 | // if wback then R[n] = offset_addr; |
| 5182 | if (wback) |
| 5183 | { |
| 5184 | context.type = eContextAdjustBaseRegister; |
| 5185 | context.SetAddress (offset_addr); |
| 5186 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 5187 | return false; |
| 5188 | } |
| 5189 | } |
| 5190 | |
| 5191 | return true; |
| 5192 | } |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 5193 | |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5194 | // Add with Carry (immediate) adds an immediate value and the carry flag value to a register value, |
| 5195 | // and writes the result to the destination register. It can optionally update the condition flags |
| 5196 | // based on the result. |
| 5197 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5198 | EmulateInstructionARM::EmulateADCImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5199 | { |
| 5200 | #if 0 |
| 5201 | // ARM pseudo code... |
| 5202 | if ConditionPassed() then |
| 5203 | EncodingSpecificOperations(); |
| 5204 | (result, carry, overflow) = AddWithCarry(R[n], imm32, APSR.C); |
| 5205 | if d == 15 then // Can only occur for ARM encoding |
| 5206 | ALUWritePC(result); // setflags is always FALSE here |
| 5207 | else |
| 5208 | R[d] = result; |
| 5209 | if setflags then |
| 5210 | APSR.N = result<31>; |
| 5211 | APSR.Z = IsZeroBit(result); |
| 5212 | APSR.C = carry; |
| 5213 | APSR.V = overflow; |
| 5214 | #endif |
| 5215 | |
| 5216 | bool success = false; |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5217 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5218 | if (ConditionPassed(opcode)) |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5219 | { |
| 5220 | uint32_t Rd, Rn; |
| 5221 | uint32_t imm32; // the immediate value to be added to the value obtained from Rn |
| 5222 | bool setflags; |
| 5223 | switch (encoding) |
| 5224 | { |
| 5225 | case eEncodingT1: |
| 5226 | Rd = Bits32(opcode, 11, 8); |
| 5227 | Rn = Bits32(opcode, 19, 16); |
| 5228 | setflags = BitIsSet(opcode, 20); |
| 5229 | imm32 = ThumbExpandImm(opcode); // imm32 = ThumbExpandImm(i:imm3:imm8) |
| 5230 | if (BadReg(Rd) || BadReg(Rn)) |
| 5231 | return false; |
| 5232 | break; |
| 5233 | case eEncodingA1: |
| 5234 | Rd = Bits32(opcode, 15, 12); |
| 5235 | Rn = Bits32(opcode, 19, 16); |
| 5236 | setflags = BitIsSet(opcode, 20); |
| 5237 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5238 | |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5239 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5240 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5241 | break; |
| 5242 | default: |
| 5243 | return false; |
| 5244 | } |
| 5245 | |
| 5246 | // Read the first operand. |
| 5247 | int32_t val1 = ReadCoreReg(Rn, &success); |
| 5248 | if (!success) |
| 5249 | return false; |
| 5250 | |
| 5251 | AddWithCarryResult res = AddWithCarry(val1, imm32, APSR_C); |
| 5252 | |
| 5253 | EmulateInstruction::Context context; |
| 5254 | context.type = EmulateInstruction::eContextImmediate; |
| 5255 | context.SetNoArgs (); |
| 5256 | |
| 5257 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 5258 | return false; |
| 5259 | } |
| 5260 | return true; |
| 5261 | } |
| 5262 | |
| 5263 | // Add with Carry (register) adds a register value, the carry flag value, and an optionally-shifted |
| 5264 | // register value, and writes the result to the destination register. It can optionally update the |
| 5265 | // condition flags based on the result. |
| 5266 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5267 | EmulateInstructionARM::EmulateADCReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5268 | { |
| 5269 | #if 0 |
| 5270 | // ARM pseudo code... |
| 5271 | if ConditionPassed() then |
| 5272 | EncodingSpecificOperations(); |
| 5273 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 5274 | (result, carry, overflow) = AddWithCarry(R[n], shifted, APSR.C); |
| 5275 | if d == 15 then // Can only occur for ARM encoding |
| 5276 | ALUWritePC(result); // setflags is always FALSE here |
| 5277 | else |
| 5278 | R[d] = result; |
| 5279 | if setflags then |
| 5280 | APSR.N = result<31>; |
| 5281 | APSR.Z = IsZeroBit(result); |
| 5282 | APSR.C = carry; |
| 5283 | APSR.V = overflow; |
| 5284 | #endif |
| 5285 | |
| 5286 | bool success = false; |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5287 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5288 | if (ConditionPassed(opcode)) |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5289 | { |
| 5290 | uint32_t Rd, Rn, Rm; |
| 5291 | ARM_ShifterType shift_t; |
| 5292 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 5293 | bool setflags; |
| 5294 | switch (encoding) |
| 5295 | { |
| 5296 | case eEncodingT1: |
| 5297 | Rd = Rn = Bits32(opcode, 2, 0); |
| 5298 | Rm = Bits32(opcode, 5, 3); |
| 5299 | setflags = !InITBlock(); |
| 5300 | shift_t = SRType_LSL; |
| 5301 | shift_n = 0; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 5302 | break; |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5303 | case eEncodingT2: |
| 5304 | Rd = Bits32(opcode, 11, 8); |
| 5305 | Rn = Bits32(opcode, 19, 16); |
| 5306 | Rm = Bits32(opcode, 3, 0); |
| 5307 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 5308 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5309 | if (BadReg(Rd) || BadReg(Rn) || BadReg(Rm)) |
| 5310 | return false; |
| 5311 | break; |
| 5312 | case eEncodingA1: |
| 5313 | Rd = Bits32(opcode, 15, 12); |
| 5314 | Rn = Bits32(opcode, 19, 16); |
| 5315 | Rm = Bits32(opcode, 3, 0); |
| 5316 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 5317 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5318 | |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5319 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5320 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5321 | break; |
| 5322 | default: |
| 5323 | return false; |
| 5324 | } |
| 5325 | |
| 5326 | // Read the first operand. |
| 5327 | int32_t val1 = ReadCoreReg(Rn, &success); |
| 5328 | if (!success) |
| 5329 | return false; |
| 5330 | |
| 5331 | // Read the second operand. |
| 5332 | int32_t val2 = ReadCoreReg(Rm, &success); |
| 5333 | if (!success) |
| 5334 | return false; |
| 5335 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 5336 | uint32_t shifted = Shift(val2, shift_t, shift_n, APSR_C, &success); |
| 5337 | if (!success) |
| 5338 | return false; |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5339 | AddWithCarryResult res = AddWithCarry(val1, shifted, APSR_C); |
| 5340 | |
| 5341 | EmulateInstruction::Context context; |
| 5342 | context.type = EmulateInstruction::eContextImmediate; |
| 5343 | context.SetNoArgs (); |
| 5344 | |
| 5345 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 5346 | return false; |
| 5347 | } |
| 5348 | return true; |
| 5349 | } |
| 5350 | |
Johnny Chen | a695f95 | 2011-02-23 21:24:25 +0000 | [diff] [blame] | 5351 | // This instruction adds an immediate value to the PC value to form a PC-relative address, |
| 5352 | // and writes the result to the destination register. |
| 5353 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5354 | EmulateInstructionARM::EmulateADR (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | a695f95 | 2011-02-23 21:24:25 +0000 | [diff] [blame] | 5355 | { |
| 5356 | #if 0 |
| 5357 | // ARM pseudo code... |
| 5358 | if ConditionPassed() then |
| 5359 | EncodingSpecificOperations(); |
| 5360 | result = if add then (Align(PC,4) + imm32) else (Align(PC,4) - imm32); |
| 5361 | if d == 15 then // Can only occur for ARM encodings |
| 5362 | ALUWritePC(result); |
| 5363 | else |
| 5364 | R[d] = result; |
| 5365 | #endif |
| 5366 | |
| 5367 | bool success = false; |
Johnny Chen | a695f95 | 2011-02-23 21:24:25 +0000 | [diff] [blame] | 5368 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5369 | if (ConditionPassed(opcode)) |
Johnny Chen | a695f95 | 2011-02-23 21:24:25 +0000 | [diff] [blame] | 5370 | { |
| 5371 | uint32_t Rd; |
| 5372 | uint32_t imm32; // the immediate value to be added/subtracted to/from the PC |
| 5373 | bool add; |
| 5374 | switch (encoding) |
| 5375 | { |
| 5376 | case eEncodingT1: |
| 5377 | Rd = Bits32(opcode, 10, 8); |
| 5378 | imm32 = ThumbImm8Scaled(opcode); // imm32 = ZeroExtend(imm8:'00', 32) |
| 5379 | break; |
| 5380 | case eEncodingT2: |
| 5381 | case eEncodingT3: |
| 5382 | Rd = Bits32(opcode, 11, 8); |
| 5383 | imm32 = ThumbImm12(opcode); // imm32 = ZeroExtend(i:imm3:imm8, 32) |
| 5384 | add = (Bits32(opcode, 24, 21) == 0); // 0b0000 => ADD; 0b0101 => SUB |
| 5385 | if (BadReg(Rd)) |
| 5386 | return false; |
| 5387 | break; |
| 5388 | case eEncodingA1: |
| 5389 | case eEncodingA2: |
| 5390 | Rd = Bits32(opcode, 15, 12); |
| 5391 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
| 5392 | add = (Bits32(opcode, 24, 21) == 0x4); // 0b0100 => ADD; 0b0010 => SUB |
| 5393 | break; |
| 5394 | default: |
| 5395 | return false; |
| 5396 | } |
| 5397 | |
| 5398 | // Read the PC value. |
| 5399 | uint32_t pc = ReadCoreReg(PC_REG, &success); |
| 5400 | if (!success) |
| 5401 | return false; |
| 5402 | |
| 5403 | uint32_t result = (add ? Align(pc, 4) + imm32 : Align(pc, 4) - imm32); |
| 5404 | |
| 5405 | EmulateInstruction::Context context; |
| 5406 | context.type = EmulateInstruction::eContextImmediate; |
| 5407 | context.SetNoArgs (); |
| 5408 | |
| 5409 | if (!WriteCoreReg(context, result, Rd)) |
| 5410 | return false; |
| 5411 | } |
| 5412 | return true; |
| 5413 | } |
| 5414 | |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5415 | // This instruction performs a bitwise AND of a register value and an immediate value, and writes the result |
| 5416 | // to the destination register. It can optionally update the condition flags based on the result. |
| 5417 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5418 | EmulateInstructionARM::EmulateANDImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5419 | { |
| 5420 | #if 0 |
| 5421 | // ARM pseudo code... |
| 5422 | if ConditionPassed() then |
| 5423 | EncodingSpecificOperations(); |
| 5424 | result = R[n] AND imm32; |
| 5425 | if d == 15 then // Can only occur for ARM encoding |
| 5426 | ALUWritePC(result); // setflags is always FALSE here |
| 5427 | else |
| 5428 | R[d] = result; |
| 5429 | if setflags then |
| 5430 | APSR.N = result<31>; |
| 5431 | APSR.Z = IsZeroBit(result); |
| 5432 | APSR.C = carry; |
| 5433 | // APSR.V unchanged |
| 5434 | #endif |
| 5435 | |
| 5436 | bool success = false; |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5437 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5438 | if (ConditionPassed(opcode)) |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5439 | { |
| 5440 | uint32_t Rd, Rn; |
| 5441 | uint32_t imm32; // the immediate value to be ANDed to the value obtained from Rn |
| 5442 | bool setflags; |
| 5443 | uint32_t carry; // the carry bit after ARM/Thumb Expand operation |
| 5444 | switch (encoding) |
| 5445 | { |
| 5446 | case eEncodingT1: |
| 5447 | Rd = Bits32(opcode, 11, 8); |
| 5448 | Rn = Bits32(opcode, 19, 16); |
| 5449 | setflags = BitIsSet(opcode, 20); |
| 5450 | imm32 = ThumbExpandImm_C(opcode, APSR_C, carry); // (imm32, carry) = ThumbExpandImm(i:imm3:imm8, APSR.C) |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 5451 | // if Rd == '1111' && S == '1' then SEE TST (immediate); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5452 | if (Rd == 15 && setflags) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5453 | return EmulateTSTImm(opcode, eEncodingT1); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5454 | if (Rd == 13 || (Rd == 15 && !setflags) || BadReg(Rn)) |
| 5455 | return false; |
| 5456 | break; |
| 5457 | case eEncodingA1: |
| 5458 | Rd = Bits32(opcode, 15, 12); |
| 5459 | Rn = Bits32(opcode, 19, 16); |
| 5460 | setflags = BitIsSet(opcode, 20); |
| 5461 | imm32 = ARMExpandImm_C(opcode, APSR_C, carry); // (imm32, carry) = ARMExpandImm(imm12, APSR.C) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5462 | |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5463 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5464 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5465 | break; |
| 5466 | default: |
| 5467 | return false; |
| 5468 | } |
| 5469 | |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5470 | // Read the first operand. |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5471 | uint32_t val1 = ReadCoreReg(Rn, &success); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5472 | if (!success) |
| 5473 | return false; |
| 5474 | |
| 5475 | uint32_t result = val1 & imm32; |
| 5476 | |
| 5477 | EmulateInstruction::Context context; |
| 5478 | context.type = EmulateInstruction::eContextImmediate; |
| 5479 | context.SetNoArgs (); |
| 5480 | |
| 5481 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
| 5482 | return false; |
| 5483 | } |
| 5484 | return true; |
| 5485 | } |
| 5486 | |
| 5487 | // This instruction performs a bitwise AND of a register value and an optionally-shifted register value, |
| 5488 | // and writes the result to the destination register. It can optionally update the condition flags |
| 5489 | // based on the result. |
| 5490 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5491 | EmulateInstructionARM::EmulateANDReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5492 | { |
| 5493 | #if 0 |
| 5494 | // ARM pseudo code... |
| 5495 | if ConditionPassed() then |
| 5496 | EncodingSpecificOperations(); |
| 5497 | (shifted, carry) = Shift_C(R[m], shift_t, shift_n, APSR.C); |
| 5498 | result = R[n] AND shifted; |
| 5499 | if d == 15 then // Can only occur for ARM encoding |
| 5500 | ALUWritePC(result); // setflags is always FALSE here |
| 5501 | else |
| 5502 | R[d] = result; |
| 5503 | if setflags then |
| 5504 | APSR.N = result<31>; |
| 5505 | APSR.Z = IsZeroBit(result); |
| 5506 | APSR.C = carry; |
| 5507 | // APSR.V unchanged |
| 5508 | #endif |
| 5509 | |
| 5510 | bool success = false; |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5511 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5512 | if (ConditionPassed(opcode)) |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5513 | { |
| 5514 | uint32_t Rd, Rn, Rm; |
| 5515 | ARM_ShifterType shift_t; |
| 5516 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 5517 | bool setflags; |
| 5518 | uint32_t carry; |
| 5519 | switch (encoding) |
| 5520 | { |
| 5521 | case eEncodingT1: |
| 5522 | Rd = Rn = Bits32(opcode, 2, 0); |
| 5523 | Rm = Bits32(opcode, 5, 3); |
| 5524 | setflags = !InITBlock(); |
| 5525 | shift_t = SRType_LSL; |
| 5526 | shift_n = 0; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 5527 | break; |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5528 | case eEncodingT2: |
| 5529 | Rd = Bits32(opcode, 11, 8); |
| 5530 | Rn = Bits32(opcode, 19, 16); |
| 5531 | Rm = Bits32(opcode, 3, 0); |
| 5532 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 5533 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 5534 | // if Rd == '1111' && S == '1' then SEE TST (register); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5535 | if (Rd == 15 && setflags) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5536 | return EmulateTSTReg(opcode, eEncodingT2); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5537 | if (Rd == 13 || (Rd == 15 && !setflags) || BadReg(Rn) || BadReg(Rm)) |
| 5538 | return false; |
| 5539 | break; |
| 5540 | case eEncodingA1: |
| 5541 | Rd = Bits32(opcode, 15, 12); |
| 5542 | Rn = Bits32(opcode, 19, 16); |
| 5543 | Rm = Bits32(opcode, 3, 0); |
| 5544 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 5545 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5546 | |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5547 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5548 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5549 | break; |
| 5550 | default: |
| 5551 | return false; |
| 5552 | } |
| 5553 | |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5554 | // Read the first operand. |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5555 | uint32_t val1 = ReadCoreReg(Rn, &success); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5556 | if (!success) |
| 5557 | return false; |
| 5558 | |
| 5559 | // Read the second operand. |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5560 | uint32_t val2 = ReadCoreReg(Rm, &success); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5561 | if (!success) |
| 5562 | return false; |
| 5563 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 5564 | uint32_t shifted = Shift_C(val2, shift_t, shift_n, APSR_C, carry, &success); |
| 5565 | if (!success) |
| 5566 | return false; |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5567 | uint32_t result = val1 & shifted; |
| 5568 | |
| 5569 | EmulateInstruction::Context context; |
| 5570 | context.type = EmulateInstruction::eContextImmediate; |
| 5571 | context.SetNoArgs (); |
| 5572 | |
| 5573 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
| 5574 | return false; |
| 5575 | } |
| 5576 | return true; |
| 5577 | } |
| 5578 | |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5579 | // Bitwise Bit Clear (immediate) performs a bitwise AND of a register value and the complement of an |
| 5580 | // immediate value, and writes the result to the destination register. It can optionally update the |
| 5581 | // condition flags based on the result. |
| 5582 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5583 | EmulateInstructionARM::EmulateBICImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5584 | { |
| 5585 | #if 0 |
| 5586 | // ARM pseudo code... |
| 5587 | if ConditionPassed() then |
| 5588 | EncodingSpecificOperations(); |
| 5589 | result = R[n] AND NOT(imm32); |
| 5590 | if d == 15 then // Can only occur for ARM encoding |
| 5591 | ALUWritePC(result); // setflags is always FALSE here |
| 5592 | else |
| 5593 | R[d] = result; |
| 5594 | if setflags then |
| 5595 | APSR.N = result<31>; |
| 5596 | APSR.Z = IsZeroBit(result); |
| 5597 | APSR.C = carry; |
| 5598 | // APSR.V unchanged |
| 5599 | #endif |
| 5600 | |
| 5601 | bool success = false; |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5602 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5603 | if (ConditionPassed(opcode)) |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5604 | { |
| 5605 | uint32_t Rd, Rn; |
| 5606 | uint32_t imm32; // the immediate value to be bitwise inverted and ANDed to the value obtained from Rn |
| 5607 | bool setflags; |
| 5608 | uint32_t carry; // the carry bit after ARM/Thumb Expand operation |
| 5609 | switch (encoding) |
| 5610 | { |
| 5611 | case eEncodingT1: |
| 5612 | Rd = Bits32(opcode, 11, 8); |
| 5613 | Rn = Bits32(opcode, 19, 16); |
| 5614 | setflags = BitIsSet(opcode, 20); |
| 5615 | imm32 = ThumbExpandImm_C(opcode, APSR_C, carry); // (imm32, carry) = ThumbExpandImm(i:imm3:imm8, APSR.C) |
| 5616 | if (BadReg(Rd) || BadReg(Rn)) |
| 5617 | return false; |
| 5618 | break; |
| 5619 | case eEncodingA1: |
| 5620 | Rd = Bits32(opcode, 15, 12); |
| 5621 | Rn = Bits32(opcode, 19, 16); |
| 5622 | setflags = BitIsSet(opcode, 20); |
| 5623 | imm32 = ARMExpandImm_C(opcode, APSR_C, carry); // (imm32, carry) = ARMExpandImm(imm12, APSR.C) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5624 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5625 | // if Rd == '1111' && S == '1' then SEE SUBS PC, LR and related instructions; |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5626 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5627 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5628 | break; |
| 5629 | default: |
| 5630 | return false; |
| 5631 | } |
| 5632 | |
| 5633 | // Read the first operand. |
| 5634 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 5635 | if (!success) |
| 5636 | return false; |
| 5637 | |
| 5638 | uint32_t result = val1 & ~imm32; |
| 5639 | |
| 5640 | EmulateInstruction::Context context; |
| 5641 | context.type = EmulateInstruction::eContextImmediate; |
| 5642 | context.SetNoArgs (); |
| 5643 | |
| 5644 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
| 5645 | return false; |
| 5646 | } |
| 5647 | return true; |
| 5648 | } |
| 5649 | |
| 5650 | // Bitwise Bit Clear (register) performs a bitwise AND of a register value and the complement of an |
| 5651 | // optionally-shifted register value, and writes the result to the destination register. |
| 5652 | // It can optionally update the condition flags based on the result. |
| 5653 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5654 | EmulateInstructionARM::EmulateBICReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5655 | { |
| 5656 | #if 0 |
| 5657 | // ARM pseudo code... |
| 5658 | if ConditionPassed() then |
| 5659 | EncodingSpecificOperations(); |
| 5660 | (shifted, carry) = Shift_C(R[m], shift_t, shift_n, APSR.C); |
| 5661 | result = R[n] AND NOT(shifted); |
| 5662 | if d == 15 then // Can only occur for ARM encoding |
| 5663 | ALUWritePC(result); // setflags is always FALSE here |
| 5664 | else |
| 5665 | R[d] = result; |
| 5666 | if setflags then |
| 5667 | APSR.N = result<31>; |
| 5668 | APSR.Z = IsZeroBit(result); |
| 5669 | APSR.C = carry; |
| 5670 | // APSR.V unchanged |
| 5671 | #endif |
| 5672 | |
| 5673 | bool success = false; |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5674 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5675 | if (ConditionPassed(opcode)) |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5676 | { |
| 5677 | uint32_t Rd, Rn, Rm; |
| 5678 | ARM_ShifterType shift_t; |
| 5679 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 5680 | bool setflags; |
| 5681 | uint32_t carry; |
| 5682 | switch (encoding) |
| 5683 | { |
| 5684 | case eEncodingT1: |
| 5685 | Rd = Rn = Bits32(opcode, 2, 0); |
| 5686 | Rm = Bits32(opcode, 5, 3); |
| 5687 | setflags = !InITBlock(); |
| 5688 | shift_t = SRType_LSL; |
| 5689 | shift_n = 0; |
| 5690 | break; |
| 5691 | case eEncodingT2: |
| 5692 | Rd = Bits32(opcode, 11, 8); |
| 5693 | Rn = Bits32(opcode, 19, 16); |
| 5694 | Rm = Bits32(opcode, 3, 0); |
| 5695 | setflags = BitIsSet(opcode, 20); |
| 5696 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
| 5697 | if (BadReg(Rd) || BadReg(Rn) || BadReg(Rm)) |
| 5698 | return false; |
| 5699 | break; |
| 5700 | case eEncodingA1: |
| 5701 | Rd = Bits32(opcode, 15, 12); |
| 5702 | Rn = Bits32(opcode, 19, 16); |
| 5703 | Rm = Bits32(opcode, 3, 0); |
| 5704 | setflags = BitIsSet(opcode, 20); |
| 5705 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5706 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5707 | // if Rd == '1111' && S == '1' then SEE SUBS PC, LR and related instructions; |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5708 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5709 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5710 | break; |
| 5711 | default: |
| 5712 | return false; |
| 5713 | } |
| 5714 | |
| 5715 | // Read the first operand. |
| 5716 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 5717 | if (!success) |
| 5718 | return false; |
| 5719 | |
| 5720 | // Read the second operand. |
| 5721 | uint32_t val2 = ReadCoreReg(Rm, &success); |
| 5722 | if (!success) |
| 5723 | return false; |
| 5724 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 5725 | uint32_t shifted = Shift_C(val2, shift_t, shift_n, APSR_C, carry, &success); |
| 5726 | if (!success) |
| 5727 | return false; |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5728 | uint32_t result = val1 & ~shifted; |
| 5729 | |
| 5730 | EmulateInstruction::Context context; |
| 5731 | context.type = EmulateInstruction::eContextImmediate; |
| 5732 | context.SetNoArgs (); |
| 5733 | |
| 5734 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
| 5735 | return false; |
| 5736 | } |
| 5737 | return true; |
| 5738 | } |
| 5739 | |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5740 | // LDR (immediate, ARM) calculates an address from a base register value and an immediate offset, loads a word |
Johnny Chen | e92b27c | 2011-02-18 01:26:39 +0000 | [diff] [blame] | 5741 | // from memory, and writes it to a register. It can use offset, post-indexed, or pre-indexed addressing. |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5742 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5743 | EmulateInstructionARM::EmulateLDRImmediateARM (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5744 | { |
| 5745 | #if 0 |
| 5746 | if ConditionPassed() then |
| 5747 | EncodingSpecificOperations(); |
| 5748 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 5749 | address = if index then offset_addr else R[n]; |
| 5750 | data = MemU[address,4]; |
| 5751 | if wback then R[n] = offset_addr; |
| 5752 | if t == 15 then |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5753 | if address<1:0> == '00' then LoadWritePC(data); else UNPREDICTABLE; |
| 5754 | elsif UnalignedSupport() || address<1:0> = '00' then |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5755 | R[t] = data; |
| 5756 | else // Can only apply before ARMv7 |
| 5757 | R[t] = ROR(data, 8*UInt(address<1:0>)); |
| 5758 | #endif |
| 5759 | |
| 5760 | bool success = false; |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5761 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5762 | if (ConditionPassed(opcode)) |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5763 | { |
| 5764 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 5765 | |
| 5766 | uint32_t t; |
| 5767 | uint32_t n; |
| 5768 | uint32_t imm32; |
| 5769 | bool index; |
| 5770 | bool add; |
| 5771 | bool wback; |
| 5772 | |
| 5773 | switch (encoding) |
| 5774 | { |
| 5775 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5776 | // if Rn == '1111' then SEE LDR (literal); |
| 5777 | // if P == '0' && W == '1' then SEE LDRT; |
| 5778 | // if Rn == '1101' && P == '0' && U == '1' && W == '0' && imm12 == '000000000100' then SEE POP; |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5779 | // t == UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 5780 | t = Bits32 (opcode, 15, 12); |
| 5781 | n = Bits32 (opcode, 19, 16); |
| 5782 | imm32 = Bits32 (opcode, 11, 0); |
| 5783 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5784 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
| 5785 | index = BitIsSet (opcode, 24); |
| 5786 | add = BitIsSet (opcode, 23); |
| 5787 | wback = (BitIsClear (opcode, 24) || BitIsSet (opcode, 21)); |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5788 | |
| 5789 | // if wback && n == t then UNPREDICTABLE; |
| 5790 | if (wback && (n == t)) |
| 5791 | return false; |
| 5792 | |
| 5793 | break; |
| 5794 | |
| 5795 | default: |
| 5796 | return false; |
| 5797 | } |
| 5798 | |
| 5799 | addr_t address; |
| 5800 | addr_t offset_addr; |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 5801 | addr_t base_address = ReadCoreReg (n, &success); |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5802 | if (!success) |
| 5803 | return false; |
| 5804 | |
| 5805 | // offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 5806 | if (add) |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 5807 | offset_addr = base_address + imm32; |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5808 | else |
| 5809 | offset_addr = base_address - imm32; |
| 5810 | |
| 5811 | // address = if index then offset_addr else R[n]; |
| 5812 | if (index) |
| 5813 | address = offset_addr; |
| 5814 | else |
| 5815 | address = base_address; |
| 5816 | |
| 5817 | // data = MemU[address,4]; |
| 5818 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 5819 | RegisterInfo base_reg; |
| 5820 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5821 | |
| 5822 | EmulateInstruction::Context context; |
| 5823 | context.type = eContextRegisterLoad; |
| 5824 | context.SetRegisterPlusOffset (base_reg, address - base_address); |
| 5825 | |
| 5826 | uint64_t data = MemURead (context, address, addr_byte_size, 0, &success); |
| 5827 | if (!success) |
| 5828 | return false; |
| 5829 | |
| 5830 | // if wback then R[n] = offset_addr; |
| 5831 | if (wback) |
| 5832 | { |
| 5833 | context.type = eContextAdjustBaseRegister; |
| 5834 | context.SetAddress (offset_addr); |
| 5835 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 5836 | return false; |
| 5837 | } |
| 5838 | |
| 5839 | // if t == 15 then |
| 5840 | if (t == 15) |
| 5841 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5842 | // if address<1:0> == '00' then LoadWritePC(data); else UNPREDICTABLE; |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5843 | if (BitIsClear (address, 1) && BitIsClear (address, 0)) |
| 5844 | { |
| 5845 | // LoadWritePC (data); |
| 5846 | context.type = eContextRegisterLoad; |
| 5847 | context.SetRegisterPlusOffset (base_reg, address - base_address); |
| 5848 | LoadWritePC (context, data); |
| 5849 | } |
| 5850 | else |
| 5851 | return false; |
| 5852 | } |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5853 | // elsif UnalignedSupport() || address<1:0> = '00' then |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5854 | else if (UnalignedSupport() || (BitIsClear (address, 1) && BitIsClear (address, 0))) |
| 5855 | { |
| 5856 | // R[t] = data; |
| 5857 | context.type = eContextRegisterLoad; |
| 5858 | context.SetRegisterPlusOffset (base_reg, address - base_address); |
| 5859 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 5860 | return false; |
| 5861 | } |
| 5862 | // else // Can only apply before ARMv7 |
| 5863 | else |
| 5864 | { |
| 5865 | // R[t] = ROR(data, 8*UInt(address<1:0>)); |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 5866 | data = ROR (data, Bits32 (address, 1, 0), &success); |
| 5867 | if (!success) |
| 5868 | return false; |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5869 | context.type = eContextRegisterLoad; |
| 5870 | context.SetImmediate (data); |
| 5871 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 5872 | return false; |
| 5873 | } |
| 5874 | |
| 5875 | } |
| 5876 | return true; |
| 5877 | } |
| 5878 | |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5879 | // LDR (register) calculates an address from a base register value and an offset register value, loads a word |
| 5880 | // from memory, and writes it to a resgister. The offset register value can optionally be shifted. |
| 5881 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5882 | EmulateInstructionARM::EmulateLDRRegister (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5883 | { |
| 5884 | #if 0 |
| 5885 | if ConditionPassed() then |
| 5886 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 5887 | offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 5888 | offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 5889 | address = if index then offset_addr else R[n]; |
| 5890 | data = MemU[address,4]; |
| 5891 | if wback then R[n] = offset_addr; |
| 5892 | if t == 15 then |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5893 | if address<1:0> == '00' then LoadWritePC(data); else UNPREDICTABLE; |
| 5894 | elsif UnalignedSupport() || address<1:0> = '00' then |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5895 | R[t] = data; |
| 5896 | else // Can only apply before ARMv7 |
| 5897 | if CurrentInstrSet() == InstrSet_ARM then |
| 5898 | R[t] = ROR(data, 8*UInt(address<1:0>)); |
| 5899 | else |
| 5900 | R[t] = bits(32) UNKNOWN; |
| 5901 | #endif |
| 5902 | |
| 5903 | bool success = false; |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5904 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5905 | if (ConditionPassed(opcode)) |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5906 | { |
| 5907 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 5908 | |
| 5909 | uint32_t t; |
| 5910 | uint32_t n; |
| 5911 | uint32_t m; |
| 5912 | bool index; |
| 5913 | bool add; |
| 5914 | bool wback; |
| 5915 | ARM_ShifterType shift_t; |
| 5916 | uint32_t shift_n; |
| 5917 | |
| 5918 | switch (encoding) |
| 5919 | { |
| 5920 | case eEncodingT1: |
| 5921 | // if CurrentInstrSet() == InstrSet_ThumbEE then SEE "Modified operation in ThumbEE"; |
| 5922 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 5923 | t = Bits32 (opcode, 2, 0); |
| 5924 | n = Bits32 (opcode, 5, 3); |
| 5925 | m = Bits32 (opcode, 8, 6); |
| 5926 | |
| 5927 | // index = TRUE; add = TRUE; wback = FALSE; |
| 5928 | index = true; |
| 5929 | add = true; |
| 5930 | wback = false; |
| 5931 | |
| 5932 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 5933 | shift_t = SRType_LSL; |
| 5934 | shift_n = 0; |
| 5935 | |
| 5936 | break; |
| 5937 | |
| 5938 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5939 | // if Rn == '1111' then SEE LDR (literal); |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5940 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 5941 | t = Bits32 (opcode, 15, 12); |
| 5942 | n = Bits32 (opcode, 19, 16); |
| 5943 | m = Bits32 (opcode, 3, 0); |
| 5944 | |
| 5945 | // index = TRUE; add = TRUE; wback = FALSE; |
| 5946 | index = true; |
| 5947 | add = true; |
| 5948 | wback = false; |
| 5949 | |
| 5950 | // (shift_t, shift_n) = (SRType_LSL, UInt(imm2)); |
| 5951 | shift_t = SRType_LSL; |
| 5952 | shift_n = Bits32 (opcode, 5, 4); |
| 5953 | |
| 5954 | // if BadReg(m) then UNPREDICTABLE; |
| 5955 | if (BadReg (m)) |
| 5956 | return false; |
| 5957 | |
| 5958 | // if t == 15 && InITBlock() && !LastInITBlock() then UNPREDICTABLE; |
| 5959 | if ((t == 15) && InITBlock() && !LastInITBlock()) |
| 5960 | return false; |
| 5961 | |
| 5962 | break; |
| 5963 | |
| 5964 | case eEncodingA1: |
| 5965 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5966 | // if P == '0' && W == '1' then SEE LDRT; |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5967 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 5968 | t = Bits32 (opcode, 15, 12); |
| 5969 | n = Bits32 (opcode, 19, 16); |
| 5970 | m = Bits32 (opcode, 3, 0); |
| 5971 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5972 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5973 | index = BitIsSet (opcode, 24); |
| 5974 | add = BitIsSet (opcode, 23); |
| 5975 | wback = (BitIsClear (opcode, 24) || BitIsSet (opcode, 21)); |
| 5976 | |
| 5977 | // (shift_t, shift_n) = DecodeImmShift(type, imm5); |
| 5978 | uint32_t type = Bits32 (opcode, 6, 5); |
| 5979 | uint32_t imm5 = Bits32 (opcode, 11, 7); |
| 5980 | shift_n = DecodeImmShift (type, imm5, shift_t); |
| 5981 | |
| 5982 | // if m == 15 then UNPREDICTABLE; |
| 5983 | if (m == 15) |
| 5984 | return false; |
| 5985 | |
| 5986 | // if wback && (n == 15 || n == t) then UNPREDICTABLE; |
| 5987 | if (wback && ((n == 15) || (n == t))) |
| 5988 | return false; |
| 5989 | } |
| 5990 | break; |
| 5991 | |
| 5992 | |
| 5993 | default: |
| 5994 | return false; |
| 5995 | } |
| 5996 | |
| 5997 | uint32_t Rm = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 5998 | if (!success) |
| 5999 | return false; |
| 6000 | |
| 6001 | uint32_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 6002 | if (!success) |
| 6003 | return false; |
| 6004 | |
| 6005 | addr_t offset_addr; |
| 6006 | addr_t address; |
| 6007 | |
| 6008 | // offset = Shift(R[m], shift_t, shift_n, APSR.C); -- Note "The APSR is an application level alias for the CPSR". |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 6009 | addr_t offset = Shift (Rm, shift_t, shift_n, Bit32 (m_opcode_cpsr, APSR_C), &success); |
| 6010 | if (!success) |
| 6011 | return false; |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 6012 | |
| 6013 | // offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 6014 | if (add) |
| 6015 | offset_addr = Rn + offset; |
| 6016 | else |
| 6017 | offset_addr = Rn - offset; |
| 6018 | |
| 6019 | // address = if index then offset_addr else R[n]; |
| 6020 | if (index) |
| 6021 | address = offset_addr; |
| 6022 | else |
| 6023 | address = Rn; |
| 6024 | |
| 6025 | // data = MemU[address,4]; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 6026 | RegisterInfo base_reg; |
| 6027 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 6028 | |
| 6029 | EmulateInstruction::Context context; |
| 6030 | context.type = eContextRegisterLoad; |
| 6031 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 6032 | |
| 6033 | uint64_t data = MemURead (context, address, addr_byte_size, 0, &success); |
| 6034 | if (!success) |
| 6035 | return false; |
| 6036 | |
| 6037 | // if wback then R[n] = offset_addr; |
| 6038 | if (wback) |
| 6039 | { |
| 6040 | context.type = eContextAdjustBaseRegister; |
| 6041 | context.SetAddress (offset_addr); |
| 6042 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 6043 | return false; |
| 6044 | } |
| 6045 | |
| 6046 | // if t == 15 then |
| 6047 | if (t == 15) |
| 6048 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6049 | // if address<1:0> == '00' then LoadWritePC(data); else UNPREDICTABLE; |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 6050 | if (BitIsClear (address, 1) && BitIsClear (address, 0)) |
| 6051 | { |
| 6052 | context.type = eContextRegisterLoad; |
| 6053 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 6054 | LoadWritePC (context, data); |
| 6055 | } |
| 6056 | else |
| 6057 | return false; |
| 6058 | } |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6059 | // elsif UnalignedSupport() || address<1:0> = '00' then |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 6060 | else if (UnalignedSupport () || (BitIsClear (address, 1) && BitIsClear (address, 0))) |
| 6061 | { |
| 6062 | // R[t] = data; |
| 6063 | context.type = eContextRegisterLoad; |
| 6064 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 6065 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 6066 | return false; |
| 6067 | } |
| 6068 | else // Can only apply before ARMv7 |
| 6069 | { |
| 6070 | // if CurrentInstrSet() == InstrSet_ARM then |
| 6071 | if (CurrentInstrSet () == eModeARM) |
| 6072 | { |
| 6073 | // R[t] = ROR(data, 8*UInt(address<1:0>)); |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 6074 | data = ROR (data, Bits32 (address, 1, 0), &success); |
| 6075 | if (!success) |
| 6076 | return false; |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 6077 | context.type = eContextRegisterLoad; |
| 6078 | context.SetImmediate (data); |
| 6079 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 6080 | return false; |
| 6081 | } |
| 6082 | else |
| 6083 | { |
| 6084 | // R[t] = bits(32) UNKNOWN; |
| 6085 | WriteBits32Unknown (t); |
| 6086 | } |
| 6087 | } |
| 6088 | } |
| 6089 | return true; |
| 6090 | } |
Caroline Tice | 21b604b | 2011-02-18 21:06:04 +0000 | [diff] [blame] | 6091 | |
| 6092 | // LDRB (immediate, Thumb) |
| 6093 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6094 | EmulateInstructionARM::EmulateLDRBImmediate (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 21b604b | 2011-02-18 21:06:04 +0000 | [diff] [blame] | 6095 | { |
| 6096 | #if 0 |
| 6097 | if ConditionPassed() then |
| 6098 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6099 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 6100 | address = if index then offset_addr else R[n]; |
| 6101 | R[t] = ZeroExtend(MemU[address,1], 32); |
| 6102 | if wback then R[n] = offset_addr; |
| 6103 | #endif |
| 6104 | |
| 6105 | bool success = false; |
Caroline Tice | 21b604b | 2011-02-18 21:06:04 +0000 | [diff] [blame] | 6106 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6107 | if (ConditionPassed(opcode)) |
Caroline Tice | 21b604b | 2011-02-18 21:06:04 +0000 | [diff] [blame] | 6108 | { |
| 6109 | uint32_t t; |
| 6110 | uint32_t n; |
| 6111 | uint32_t imm32; |
| 6112 | bool index; |
| 6113 | bool add; |
| 6114 | bool wback; |
| 6115 | |
| 6116 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6117 | switch (encoding) |
| 6118 | { |
| 6119 | case eEncodingT1: |
| 6120 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm5, 32); |
| 6121 | t = Bits32 (opcode, 2, 0); |
| 6122 | n = Bits32 (opcode, 5, 3); |
| 6123 | imm32 = Bits32 (opcode, 10, 6); |
| 6124 | |
| 6125 | // index = TRUE; add = TRUE; wback = FALSE; |
| 6126 | index = true; |
| 6127 | add = true; |
| 6128 | wback= false; |
| 6129 | |
| 6130 | break; |
| 6131 | |
| 6132 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6133 | // if Rt == '1111' then SEE PLD; |
| 6134 | // if Rn == '1111' then SEE LDRB (literal); |
Caroline Tice | 21b604b | 2011-02-18 21:06:04 +0000 | [diff] [blame] | 6135 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 6136 | t = Bits32 (opcode, 15, 12); |
| 6137 | n = Bits32 (opcode, 19, 16); |
| 6138 | imm32 = Bits32 (opcode, 11, 0); |
| 6139 | |
| 6140 | // index = TRUE; add = TRUE; wback = FALSE; |
| 6141 | index = true; |
| 6142 | add = true; |
| 6143 | wback = false; |
| 6144 | |
| 6145 | // if t == 13 then UNPREDICTABLE; |
| 6146 | if (t == 13) |
| 6147 | return false; |
| 6148 | |
| 6149 | break; |
| 6150 | |
| 6151 | case eEncodingT3: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6152 | // if Rt == '1111' && P == '1' && U == '0' && W == '0' then SEE PLD; |
| 6153 | // if Rn == '1111' then SEE LDRB (literal); |
| 6154 | // if P == '1' && U == '1' && W == '0' then SEE LDRBT; |
| 6155 | // if P == '0' && W == '0' then UNDEFINED; |
Caroline Tice | 21b604b | 2011-02-18 21:06:04 +0000 | [diff] [blame] | 6156 | if (BitIsClear (opcode, 10) && BitIsClear (opcode, 8)) |
| 6157 | return false; |
| 6158 | |
| 6159 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm8, 32); |
| 6160 | t = Bits32 (opcode, 15, 12); |
| 6161 | n = Bits32 (opcode, 19, 16); |
| 6162 | imm32 = Bits32 (opcode, 7, 0); |
| 6163 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6164 | // index = (P == '1'); add = (U == '1'); wback = (W == '1'); |
Caroline Tice | 21b604b | 2011-02-18 21:06:04 +0000 | [diff] [blame] | 6165 | index = BitIsSet (opcode, 10); |
| 6166 | add = BitIsSet (opcode, 9); |
| 6167 | wback = BitIsSet (opcode, 8); |
| 6168 | |
| 6169 | // if BadReg(t) || (wback && n == t) then UNPREDICTABLE; |
| 6170 | if (BadReg (t) || (wback && (n == t))) |
| 6171 | return false; |
| 6172 | |
| 6173 | break; |
| 6174 | |
| 6175 | default: |
| 6176 | return false; |
| 6177 | } |
| 6178 | |
| 6179 | uint32_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 6180 | if (!success) |
| 6181 | return false; |
| 6182 | |
| 6183 | addr_t address; |
| 6184 | addr_t offset_addr; |
| 6185 | |
| 6186 | // offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 6187 | if (add) |
| 6188 | offset_addr = Rn + imm32; |
| 6189 | else |
| 6190 | offset_addr = Rn - imm32; |
| 6191 | |
| 6192 | // address = if index then offset_addr else R[n]; |
| 6193 | if (index) |
| 6194 | address = offset_addr; |
| 6195 | else |
| 6196 | address = Rn; |
| 6197 | |
| 6198 | // R[t] = ZeroExtend(MemU[address,1], 32); |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 6199 | RegisterInfo base_reg; |
| 6200 | RegisterInfo data_reg; |
| 6201 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
| 6202 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + t, data_reg); |
Caroline Tice | 21b604b | 2011-02-18 21:06:04 +0000 | [diff] [blame] | 6203 | |
| 6204 | EmulateInstruction::Context context; |
| 6205 | context.type = eContextRegisterLoad; |
| 6206 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 6207 | |
| 6208 | uint64_t data = MemURead (context, address, 1, 0, &success); |
| 6209 | if (!success) |
| 6210 | return false; |
| 6211 | |
| 6212 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 6213 | return false; |
| 6214 | |
| 6215 | // if wback then R[n] = offset_addr; |
| 6216 | if (wback) |
| 6217 | { |
| 6218 | context.type = eContextAdjustBaseRegister; |
| 6219 | context.SetAddress (offset_addr); |
| 6220 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 6221 | return false; |
| 6222 | } |
| 6223 | } |
| 6224 | return true; |
| 6225 | } |
Caroline Tice | f55261f | 2011-02-18 22:24:22 +0000 | [diff] [blame] | 6226 | |
| 6227 | // LDRB (literal) calculates an address from the PC value and an immediate offset, loads a byte from memory, |
| 6228 | // zero-extends it to form a 32-bit word and writes it to a register. |
| 6229 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6230 | EmulateInstructionARM::EmulateLDRBLiteral (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | f55261f | 2011-02-18 22:24:22 +0000 | [diff] [blame] | 6231 | { |
| 6232 | #if 0 |
| 6233 | if ConditionPassed() then |
| 6234 | EncodingSpecificOperations(); NullCheckIfThumbEE(15); |
| 6235 | base = Align(PC,4); |
| 6236 | address = if add then (base + imm32) else (base - imm32); |
| 6237 | R[t] = ZeroExtend(MemU[address,1], 32); |
| 6238 | #endif |
| 6239 | |
| 6240 | bool success = false; |
Caroline Tice | f55261f | 2011-02-18 22:24:22 +0000 | [diff] [blame] | 6241 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6242 | if (ConditionPassed(opcode)) |
Caroline Tice | f55261f | 2011-02-18 22:24:22 +0000 | [diff] [blame] | 6243 | { |
| 6244 | uint32_t t; |
| 6245 | uint32_t imm32; |
| 6246 | bool add; |
| 6247 | switch (encoding) |
| 6248 | { |
| 6249 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6250 | // if Rt == '1111' then SEE PLD; |
| 6251 | // t = UInt(Rt); imm32 = ZeroExtend(imm12, 32); add = (U == '1'); |
Caroline Tice | f55261f | 2011-02-18 22:24:22 +0000 | [diff] [blame] | 6252 | t = Bits32 (opcode, 15, 12); |
| 6253 | imm32 = Bits32 (opcode, 11, 0); |
| 6254 | add = BitIsSet (opcode, 23); |
| 6255 | |
| 6256 | // if t == 13 then UNPREDICTABLE; |
| 6257 | if (t == 13) |
| 6258 | return false; |
| 6259 | |
| 6260 | break; |
| 6261 | |
| 6262 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6263 | // t == UInt(Rt); imm32 = ZeroExtend(imm12, 32); add = (U == '1'); |
Caroline Tice | f55261f | 2011-02-18 22:24:22 +0000 | [diff] [blame] | 6264 | t = Bits32 (opcode, 15, 12); |
| 6265 | imm32 = Bits32 (opcode, 11, 0); |
| 6266 | add = BitIsSet (opcode, 23); |
| 6267 | |
| 6268 | // if t == 15 then UNPREDICTABLE; |
| 6269 | if (t == 15) |
| 6270 | return false; |
| 6271 | break; |
| 6272 | |
| 6273 | default: |
| 6274 | return false; |
| 6275 | } |
| 6276 | |
| 6277 | // base = Align(PC,4); |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 6278 | uint32_t pc_val = ReadCoreReg (PC_REG, &success); |
Caroline Tice | f55261f | 2011-02-18 22:24:22 +0000 | [diff] [blame] | 6279 | if (!success) |
| 6280 | return false; |
| 6281 | |
| 6282 | uint32_t base = AlignPC (pc_val); |
| 6283 | |
| 6284 | addr_t address; |
| 6285 | // address = if add then (base + imm32) else (base - imm32); |
| 6286 | if (add) |
| 6287 | address = base + imm32; |
| 6288 | else |
| 6289 | address = base - imm32; |
| 6290 | |
| 6291 | // R[t] = ZeroExtend(MemU[address,1], 32); |
| 6292 | EmulateInstruction::Context context; |
| 6293 | context.type = eContextRelativeBranchImmediate; |
| 6294 | context.SetImmediate (address - base); |
| 6295 | |
| 6296 | uint64_t data = MemURead (context, address, 1, 0, &success); |
| 6297 | if (!success) |
| 6298 | return false; |
| 6299 | |
| 6300 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 6301 | return false; |
| 6302 | } |
| 6303 | return true; |
| 6304 | } |
Caroline Tice | 30fec12 | 2011-02-18 23:52:21 +0000 | [diff] [blame] | 6305 | |
| 6306 | // LDRB (register) calculates an address from a base register value and an offset rigister value, loads a byte from |
| 6307 | // memory, zero-extends it to form a 32-bit word, and writes it to a register. The offset register value can |
| 6308 | // optionally be shifted. |
| 6309 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6310 | EmulateInstructionARM::EmulateLDRBRegister (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 30fec12 | 2011-02-18 23:52:21 +0000 | [diff] [blame] | 6311 | { |
| 6312 | #if 0 |
| 6313 | if ConditionPassed() then |
| 6314 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6315 | offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 6316 | offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 6317 | address = if index then offset_addr else R[n]; |
| 6318 | R[t] = ZeroExtend(MemU[address,1],32); |
| 6319 | if wback then R[n] = offset_addr; |
| 6320 | #endif |
| 6321 | |
| 6322 | bool success = false; |
Caroline Tice | 30fec12 | 2011-02-18 23:52:21 +0000 | [diff] [blame] | 6323 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6324 | if (ConditionPassed(opcode)) |
Caroline Tice | 30fec12 | 2011-02-18 23:52:21 +0000 | [diff] [blame] | 6325 | { |
| 6326 | uint32_t t; |
| 6327 | uint32_t n; |
| 6328 | uint32_t m; |
| 6329 | bool index; |
| 6330 | bool add; |
| 6331 | bool wback; |
| 6332 | ARM_ShifterType shift_t; |
| 6333 | uint32_t shift_n; |
| 6334 | |
| 6335 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6336 | switch (encoding) |
| 6337 | { |
| 6338 | case eEncodingT1: |
| 6339 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 6340 | t = Bits32 (opcode, 2, 0); |
| 6341 | n = Bits32 (opcode, 5, 3); |
| 6342 | m = Bits32 (opcode, 8, 6); |
| 6343 | |
| 6344 | // index = TRUE; add = TRUE; wback = FALSE; |
| 6345 | index = true; |
| 6346 | add = true; |
| 6347 | wback = false; |
| 6348 | |
| 6349 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 6350 | shift_t = SRType_LSL; |
| 6351 | shift_n = 0; |
| 6352 | break; |
| 6353 | |
| 6354 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6355 | // if Rt == '1111' then SEE PLD; |
| 6356 | // if Rn == '1111' then SEE LDRB (literal); |
Caroline Tice | 30fec12 | 2011-02-18 23:52:21 +0000 | [diff] [blame] | 6357 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 6358 | t = Bits32 (opcode, 15, 12); |
| 6359 | n = Bits32 (opcode, 19, 16); |
| 6360 | m = Bits32 (opcode, 3, 0); |
| 6361 | |
| 6362 | // index = TRUE; add = TRUE; wback = FALSE; |
| 6363 | index = true; |
| 6364 | add = true; |
| 6365 | wback = false; |
| 6366 | |
| 6367 | // (shift_t, shift_n) = (SRType_LSL, UInt(imm2)); |
| 6368 | shift_t = SRType_LSL; |
| 6369 | shift_n = Bits32 (opcode, 5, 4); |
| 6370 | |
| 6371 | // if t == 13 || BadReg(m) then UNPREDICTABLE; |
| 6372 | if ((t == 13) || BadReg (m)) |
| 6373 | return false; |
| 6374 | break; |
| 6375 | |
| 6376 | case eEncodingA1: |
| 6377 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6378 | // if P == '0' && W == '1' then SEE LDRBT; |
Caroline Tice | 30fec12 | 2011-02-18 23:52:21 +0000 | [diff] [blame] | 6379 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 6380 | t = Bits32 (opcode, 15, 12); |
| 6381 | n = Bits32 (opcode, 19, 16); |
| 6382 | m = Bits32 (opcode, 3, 0); |
| 6383 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6384 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
Caroline Tice | 30fec12 | 2011-02-18 23:52:21 +0000 | [diff] [blame] | 6385 | index = BitIsSet (opcode, 24); |
| 6386 | add = BitIsSet (opcode, 23); |
| 6387 | wback = (BitIsClear (opcode, 24) || BitIsSet (opcode, 21)); |
| 6388 | |
| 6389 | // (shift_t, shift_n) = DecodeImmShift(type, imm5); |
| 6390 | uint32_t type = Bits32 (opcode, 6, 5); |
| 6391 | uint32_t imm5 = Bits32 (opcode, 11, 7); |
| 6392 | shift_n = DecodeImmShift (type, imm5, shift_t); |
| 6393 | |
| 6394 | // if t == 15 || m == 15 then UNPREDICTABLE; |
| 6395 | if ((t == 15) || (m == 15)) |
| 6396 | return false; |
| 6397 | |
| 6398 | // if wback && (n == 15 || n == t) then UNPREDICTABLE; |
| 6399 | if (wback && ((n == 15) || (n == t))) |
| 6400 | return false; |
| 6401 | } |
| 6402 | break; |
| 6403 | |
| 6404 | default: |
| 6405 | return false; |
| 6406 | } |
| 6407 | |
| 6408 | addr_t offset_addr; |
| 6409 | addr_t address; |
| 6410 | |
| 6411 | // offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 6412 | uint32_t Rm = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 6413 | if (!success) |
| 6414 | return false; |
| 6415 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 6416 | addr_t offset = Shift (Rm, shift_t, shift_n, APSR_C, &success); |
| 6417 | if (!success) |
| 6418 | return false; |
Caroline Tice | 30fec12 | 2011-02-18 23:52:21 +0000 | [diff] [blame] | 6419 | |
| 6420 | // offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 6421 | uint32_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 6422 | if (!success) |
| 6423 | return false; |
| 6424 | |
| 6425 | if (add) |
| 6426 | offset_addr = Rn + offset; |
| 6427 | else |
| 6428 | offset_addr = Rn - offset; |
| 6429 | |
| 6430 | // address = if index then offset_addr else R[n]; |
| 6431 | if (index) |
| 6432 | address = offset_addr; |
| 6433 | else |
| 6434 | address = Rn; |
| 6435 | |
| 6436 | // R[t] = ZeroExtend(MemU[address,1],32); |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 6437 | RegisterInfo base_reg; |
| 6438 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | 30fec12 | 2011-02-18 23:52:21 +0000 | [diff] [blame] | 6439 | |
| 6440 | EmulateInstruction::Context context; |
| 6441 | context.type = eContextRegisterLoad; |
| 6442 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 6443 | |
| 6444 | uint64_t data = MemURead (context, address, 1, 0, &success); |
| 6445 | if (!success) |
| 6446 | return false; |
| 6447 | |
| 6448 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 6449 | return false; |
| 6450 | |
| 6451 | // if wback then R[n] = offset_addr; |
| 6452 | if (wback) |
| 6453 | { |
| 6454 | context.type = eContextAdjustBaseRegister; |
| 6455 | context.SetAddress (offset_addr); |
| 6456 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 6457 | return false; |
| 6458 | } |
| 6459 | } |
| 6460 | return true; |
| 6461 | } |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6462 | |
| 6463 | // LDRH (immediate, Thumb) calculates an address from a base register value and an immediate offset, loads a |
| 6464 | // halfword from memory, zero-extends it to form a 32-bit word, and writes it to a register. It can use offset, |
| 6465 | // post-indexed, or pre-indexed addressing. |
| 6466 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6467 | EmulateInstructionARM::EmulateLDRHImmediate (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6468 | { |
| 6469 | #if 0 |
| 6470 | if ConditionPassed() then |
| 6471 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6472 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 6473 | address = if index then offset_addr else R[n]; |
| 6474 | data = MemU[address,2]; |
| 6475 | if wback then R[n] = offset_addr; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6476 | if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6477 | R[t] = ZeroExtend(data, 32); |
| 6478 | else // Can only apply before ARMv7 |
| 6479 | R[t] = bits(32) UNKNOWN; |
| 6480 | #endif |
| 6481 | |
| 6482 | |
| 6483 | bool success = false; |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6484 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6485 | if (ConditionPassed(opcode)) |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6486 | { |
| 6487 | uint32_t t; |
| 6488 | uint32_t n; |
| 6489 | uint32_t imm32; |
| 6490 | bool index; |
| 6491 | bool add; |
| 6492 | bool wback; |
| 6493 | |
| 6494 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6495 | switch (encoding) |
| 6496 | { |
| 6497 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6498 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm5:'0', 32); |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6499 | t = Bits32 (opcode, 2, 0); |
| 6500 | n = Bits32 (opcode, 5, 3); |
| 6501 | imm32 = Bits32 (opcode, 10, 6) << 1; |
| 6502 | |
| 6503 | // index = TRUE; add = TRUE; wback = FALSE; |
| 6504 | index = true; |
| 6505 | add = true; |
| 6506 | wback = false; |
| 6507 | |
| 6508 | break; |
| 6509 | |
| 6510 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6511 | // if Rt == '1111' then SEE "Unallocated memory hints"; |
| 6512 | // if Rn == '1111' then SEE LDRH (literal); |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6513 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 6514 | t = Bits32 (opcode, 15, 12); |
| 6515 | n = Bits32 (opcode, 19, 16); |
| 6516 | imm32 = Bits32 (opcode, 11, 0); |
| 6517 | |
| 6518 | // index = TRUE; add = TRUE; wback = FALSE; |
| 6519 | index = true; |
| 6520 | add = true; |
| 6521 | wback = false; |
| 6522 | |
| 6523 | // if t == 13 then UNPREDICTABLE; |
| 6524 | if (t == 13) |
| 6525 | return false; |
| 6526 | break; |
| 6527 | |
| 6528 | case eEncodingT3: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6529 | // if Rn == '1111' then SEE LDRH (literal); |
| 6530 | // if Rt == '1111' && P == '1' && U == '0' && W == '0' then SEE "Unallocated memory hints"; |
| 6531 | // if P == '1' && U == '1' && W == '0' then SEE LDRHT; |
| 6532 | // if P == '0' && W == '0' then UNDEFINED; |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6533 | if (BitIsClear (opcode, 10) && BitIsClear (opcode, 8)) |
| 6534 | return false; |
| 6535 | |
| 6536 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm8, 32); |
| 6537 | t = Bits32 (opcode, 15, 12); |
| 6538 | n = Bits32 (opcode, 19, 16); |
| 6539 | imm32 = Bits32 (opcode, 7, 0); |
| 6540 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6541 | // index = (P == '1'); add = (U == '1'); wback = (W == '1'); |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6542 | index = BitIsSet (opcode, 10); |
| 6543 | add = BitIsSet (opcode, 9); |
| 6544 | wback = BitIsSet (opcode, 8); |
| 6545 | |
| 6546 | // if BadReg(t) || (wback && n == t) then UNPREDICTABLE; |
| 6547 | if (BadReg (t) || (wback && (n == t))) |
| 6548 | return false; |
| 6549 | break; |
| 6550 | |
| 6551 | default: |
| 6552 | return false; |
| 6553 | } |
| 6554 | |
| 6555 | // offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 6556 | uint32_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 6557 | if (!success) |
| 6558 | return false; |
| 6559 | |
| 6560 | addr_t offset_addr; |
| 6561 | addr_t address; |
| 6562 | |
| 6563 | if (add) |
| 6564 | offset_addr = Rn + imm32; |
| 6565 | else |
| 6566 | offset_addr = Rn - imm32; |
| 6567 | |
| 6568 | // address = if index then offset_addr else R[n]; |
| 6569 | if (index) |
| 6570 | address = offset_addr; |
| 6571 | else |
| 6572 | address = Rn; |
| 6573 | |
| 6574 | // data = MemU[address,2]; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 6575 | RegisterInfo base_reg; |
| 6576 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6577 | |
| 6578 | EmulateInstruction::Context context; |
| 6579 | context.type = eContextRegisterLoad; |
| 6580 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 6581 | |
| 6582 | uint64_t data = MemURead (context, address, 2, 0, &success); |
| 6583 | if (!success) |
| 6584 | return false; |
| 6585 | |
| 6586 | // if wback then R[n] = offset_addr; |
| 6587 | if (wback) |
| 6588 | { |
| 6589 | context.type = eContextAdjustBaseRegister; |
| 6590 | context.SetAddress (offset_addr); |
| 6591 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 6592 | return false; |
| 6593 | } |
| 6594 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6595 | // if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6596 | if (UnalignedSupport () || BitIsClear (address, 0)) |
| 6597 | { |
| 6598 | // R[t] = ZeroExtend(data, 32); |
| 6599 | context.type = eContextRegisterLoad; |
| 6600 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 6601 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 6602 | return false; |
| 6603 | } |
| 6604 | else // Can only apply before ARMv7 |
| 6605 | { |
| 6606 | // R[t] = bits(32) UNKNOWN; |
| 6607 | WriteBits32Unknown (t); |
| 6608 | } |
| 6609 | } |
| 6610 | return true; |
| 6611 | } |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 6612 | |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6613 | // LDRH (literal) caculates an address from the PC value and an immediate offset, loads a halfword from memory, |
| 6614 | // zero-extends it to form a 32-bit word, and writes it to a register. |
| 6615 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6616 | EmulateInstructionARM::EmulateLDRHLiteral (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6617 | { |
| 6618 | #if 0 |
| 6619 | if ConditionPassed() then |
| 6620 | EncodingSpecificOperations(); NullCheckIfThumbEE(15); |
| 6621 | base = Align(PC,4); |
| 6622 | address = if add then (base + imm32) else (base - imm32); |
| 6623 | data = MemU[address,2]; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6624 | if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6625 | R[t] = ZeroExtend(data, 32); |
| 6626 | else // Can only apply before ARMv7 |
| 6627 | R[t] = bits(32) UNKNOWN; |
| 6628 | #endif |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6629 | |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6630 | bool success = false; |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6631 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6632 | if (ConditionPassed(opcode)) |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6633 | { |
| 6634 | uint32_t t; |
| 6635 | uint32_t imm32; |
| 6636 | bool add; |
| 6637 | |
| 6638 | // EncodingSpecificOperations(); NullCheckIfThumbEE(15); |
| 6639 | switch (encoding) |
| 6640 | { |
| 6641 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6642 | // if Rt == '1111' then SEE "Unallocated memory hints"; |
| 6643 | // t = UInt(Rt); imm32 = ZeroExtend(imm12, 32); add = (U == '1'); |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6644 | t = Bits32 (opcode, 15, 12); |
| 6645 | imm32 = Bits32 (opcode, 11, 0); |
| 6646 | add = BitIsSet (opcode, 23); |
| 6647 | |
| 6648 | // if t == 13 then UNPREDICTABLE; |
| 6649 | if (t == 13) |
| 6650 | return false; |
| 6651 | |
| 6652 | break; |
| 6653 | |
| 6654 | case eEncodingA1: |
| 6655 | { |
| 6656 | uint32_t imm4H = Bits32 (opcode, 11, 8); |
| 6657 | uint32_t imm4L = Bits32 (opcode, 3, 0); |
| 6658 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6659 | // t == UInt(Rt); imm32 = ZeroExtend(imm4H:imm4L, 32); add = (U == '1'); |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6660 | t = Bits32 (opcode, 15, 12); |
Caroline Tice | 40b1a6c | 2011-03-03 00:07:02 +0000 | [diff] [blame] | 6661 | imm32 = (imm4H << 4) | imm4L; |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6662 | add = BitIsSet (opcode, 23); |
| 6663 | |
| 6664 | // if t == 15 then UNPREDICTABLE; |
| 6665 | if (t == 15) |
| 6666 | return false; |
| 6667 | break; |
| 6668 | } |
| 6669 | |
| 6670 | default: |
| 6671 | return false; |
| 6672 | } |
| 6673 | |
| 6674 | // base = Align(PC,4); |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 6675 | uint64_t pc_value = ReadCoreReg (PC_REG, &success); |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6676 | if (!success) |
| 6677 | return false; |
| 6678 | |
| 6679 | addr_t base = AlignPC (pc_value); |
| 6680 | addr_t address; |
| 6681 | |
| 6682 | // address = if add then (base + imm32) else (base - imm32); |
| 6683 | if (add) |
| 6684 | address = base + imm32; |
| 6685 | else |
| 6686 | address = base - imm32; |
| 6687 | |
| 6688 | // data = MemU[address,2]; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 6689 | RegisterInfo base_reg; |
| 6690 | GetRegisterInfo (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC, base_reg); |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6691 | |
| 6692 | EmulateInstruction::Context context; |
| 6693 | context.type = eContextRegisterLoad; |
| 6694 | context.SetRegisterPlusOffset (base_reg, address - base); |
| 6695 | |
| 6696 | uint64_t data = MemURead (context, address, 2, 0, &success); |
| 6697 | if (!success) |
| 6698 | return false; |
| 6699 | |
| 6700 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6701 | // if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6702 | if (UnalignedSupport () || BitIsClear (address, 0)) |
| 6703 | { |
| 6704 | // R[t] = ZeroExtend(data, 32); |
| 6705 | context.type = eContextRegisterLoad; |
| 6706 | context.SetRegisterPlusOffset (base_reg, address - base); |
| 6707 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 6708 | return false; |
| 6709 | |
| 6710 | } |
| 6711 | else // Can only apply before ARMv7 |
| 6712 | { |
| 6713 | // R[t] = bits(32) UNKNOWN; |
| 6714 | WriteBits32Unknown (t); |
| 6715 | } |
| 6716 | } |
| 6717 | return true; |
| 6718 | } |
| 6719 | |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6720 | // LDRH (literal) calculates an address from a base register value and an offset register value, loads a halfword |
| 6721 | // from memory, zero-extends it to form a 32-bit word, and writes it to a register. The offset register value can |
| 6722 | // be shifted left by 0, 1, 2, or 3 bits. |
| 6723 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6724 | EmulateInstructionARM::EmulateLDRHRegister (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6725 | { |
| 6726 | #if 0 |
| 6727 | if ConditionPassed() then |
| 6728 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6729 | offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 6730 | offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 6731 | address = if index then offset_addr else R[n]; |
| 6732 | data = MemU[address,2]; |
| 6733 | if wback then R[n] = offset_addr; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6734 | if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6735 | R[t] = ZeroExtend(data, 32); |
| 6736 | else // Can only apply before ARMv7 |
| 6737 | R[t] = bits(32) UNKNOWN; |
| 6738 | #endif |
| 6739 | |
| 6740 | bool success = false; |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6741 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6742 | if (ConditionPassed(opcode)) |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6743 | { |
| 6744 | uint32_t t; |
| 6745 | uint32_t n; |
| 6746 | uint32_t m; |
| 6747 | bool index; |
| 6748 | bool add; |
| 6749 | bool wback; |
| 6750 | ARM_ShifterType shift_t; |
| 6751 | uint32_t shift_n; |
| 6752 | |
| 6753 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6754 | switch (encoding) |
| 6755 | { |
| 6756 | case eEncodingT1: |
| 6757 | // if CurrentInstrSet() == InstrSet_ThumbEE then SEE "Modified operation in ThumbEE"; |
| 6758 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 6759 | t = Bits32 (opcode, 2, 0); |
| 6760 | n = Bits32 (opcode, 5, 3); |
| 6761 | m = Bits32 (opcode, 8, 6); |
| 6762 | |
| 6763 | // index = TRUE; add = TRUE; wback = FALSE; |
| 6764 | index = true; |
| 6765 | add = true; |
| 6766 | wback = false; |
| 6767 | |
| 6768 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 6769 | shift_t = SRType_LSL; |
| 6770 | shift_n = 0; |
| 6771 | |
| 6772 | break; |
| 6773 | |
| 6774 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6775 | // if Rn == '1111' then SEE LDRH (literal); |
| 6776 | // if Rt == '1111' then SEE "Unallocated memory hints"; |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6777 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 6778 | t = Bits32 (opcode, 15, 12); |
| 6779 | n = Bits32 (opcode, 19, 16); |
| 6780 | m = Bits32 (opcode, 3, 0); |
| 6781 | |
| 6782 | // index = TRUE; add = TRUE; wback = FALSE; |
| 6783 | index = true; |
| 6784 | add = true; |
| 6785 | wback = false; |
| 6786 | |
| 6787 | // (shift_t, shift_n) = (SRType_LSL, UInt(imm2)); |
| 6788 | shift_t = SRType_LSL; |
| 6789 | shift_n = Bits32 (opcode, 5, 4); |
| 6790 | |
| 6791 | // if t == 13 || BadReg(m) then UNPREDICTABLE; |
| 6792 | if ((t == 13) || BadReg (m)) |
| 6793 | return false; |
| 6794 | break; |
| 6795 | |
| 6796 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6797 | // if P == '0' && W == '1' then SEE LDRHT; |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6798 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 6799 | t = Bits32 (opcode, 15, 12); |
| 6800 | n = Bits32 (opcode, 19, 16); |
| 6801 | m = Bits32 (opcode, 3, 0); |
| 6802 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6803 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6804 | index = BitIsSet (opcode, 24); |
| 6805 | add = BitIsSet (opcode, 23); |
| 6806 | wback = (BitIsClear (opcode, 24) || BitIsSet (opcode, 21)); |
| 6807 | |
| 6808 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 6809 | shift_t = SRType_LSL; |
| 6810 | shift_n = 0; |
| 6811 | |
| 6812 | // if t == 15 || m == 15 then UNPREDICTABLE; |
| 6813 | if ((t == 15) || (m == 15)) |
| 6814 | return false; |
| 6815 | |
| 6816 | // if wback && (n == 15 || n == t) then UNPREDICTABLE; |
| 6817 | if (wback && ((n == 15) || (n == t))) |
| 6818 | return false; |
| 6819 | |
| 6820 | break; |
| 6821 | |
| 6822 | default: |
| 6823 | return false; |
| 6824 | } |
| 6825 | |
| 6826 | // offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 6827 | |
| 6828 | uint64_t Rm = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 6829 | if (!success) |
| 6830 | return false; |
| 6831 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 6832 | addr_t offset = Shift (Rm, shift_t, shift_n, APSR_C, &success); |
| 6833 | if (!success) |
| 6834 | return false; |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6835 | |
| 6836 | addr_t offset_addr; |
| 6837 | addr_t address; |
| 6838 | |
| 6839 | // offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 6840 | uint64_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 6841 | if (!success) |
| 6842 | return false; |
| 6843 | |
| 6844 | if (add) |
| 6845 | offset_addr = Rn + offset; |
| 6846 | else |
| 6847 | offset_addr = Rn - offset; |
| 6848 | |
| 6849 | // address = if index then offset_addr else R[n]; |
| 6850 | if (index) |
| 6851 | address = offset_addr; |
| 6852 | else |
| 6853 | address = Rn; |
| 6854 | |
| 6855 | // data = MemU[address,2]; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 6856 | RegisterInfo base_reg; |
| 6857 | RegisterInfo offset_reg; |
| 6858 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
| 6859 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + m, offset_reg); |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6860 | |
| 6861 | EmulateInstruction::Context context; |
| 6862 | context.type = eContextRegisterLoad; |
| 6863 | context.SetRegisterPlusIndirectOffset (base_reg, offset_reg); |
| 6864 | uint64_t data = MemURead (context, address, 2, 0, &success); |
| 6865 | if (!success) |
| 6866 | return false; |
| 6867 | |
| 6868 | // if wback then R[n] = offset_addr; |
| 6869 | if (wback) |
| 6870 | { |
| 6871 | context.type = eContextAdjustBaseRegister; |
| 6872 | context.SetAddress (offset_addr); |
| 6873 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 6874 | return false; |
| 6875 | } |
| 6876 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6877 | // if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6878 | if (UnalignedSupport() || BitIsClear (address, 0)) |
| 6879 | { |
| 6880 | // R[t] = ZeroExtend(data, 32); |
| 6881 | context.type = eContextRegisterLoad; |
| 6882 | context.SetRegisterPlusIndirectOffset (base_reg, offset_reg); |
| 6883 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 6884 | return false; |
| 6885 | } |
| 6886 | else // Can only apply before ARMv7 |
| 6887 | { |
| 6888 | // R[t] = bits(32) UNKNOWN; |
| 6889 | WriteBits32Unknown (t); |
| 6890 | } |
| 6891 | } |
| 6892 | return true; |
| 6893 | } |
| 6894 | |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6895 | // LDRSB (immediate) calculates an address from a base register value and an immediate offset, loads a byte from |
| 6896 | // memory, sign-extends it to form a 32-bit word, and writes it to a register. It can use offset, post-indexed, |
| 6897 | // or pre-indexed addressing. |
| 6898 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6899 | EmulateInstructionARM::EmulateLDRSBImmediate (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6900 | { |
| 6901 | #if 0 |
| 6902 | if ConditionPassed() then |
| 6903 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6904 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 6905 | address = if index then offset_addr else R[n]; |
| 6906 | R[t] = SignExtend(MemU[address,1], 32); |
| 6907 | if wback then R[n] = offset_addr; |
| 6908 | #endif |
| 6909 | |
| 6910 | bool success = false; |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6911 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6912 | if (ConditionPassed(opcode)) |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6913 | { |
| 6914 | uint32_t t; |
| 6915 | uint32_t n; |
| 6916 | uint32_t imm32; |
| 6917 | bool index; |
| 6918 | bool add; |
| 6919 | bool wback; |
| 6920 | |
| 6921 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6922 | switch (encoding) |
| 6923 | { |
| 6924 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6925 | // if Rt == '1111' then SEE PLI; |
| 6926 | // if Rn == '1111' then SEE LDRSB (literal); |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6927 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 6928 | t = Bits32 (opcode, 15, 12); |
| 6929 | n = Bits32 (opcode, 19, 16); |
| 6930 | imm32 = Bits32 (opcode, 11, 0); |
| 6931 | |
| 6932 | // index = TRUE; add = TRUE; wback = FALSE; |
| 6933 | index = true; |
| 6934 | add = true; |
| 6935 | wback = false; |
| 6936 | |
| 6937 | // if t == 13 then UNPREDICTABLE; |
| 6938 | if (t == 13) |
| 6939 | return false; |
| 6940 | |
| 6941 | break; |
| 6942 | |
| 6943 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6944 | // if Rt == '1111' && P == '1' && U == '0' && W == '0' then SEE PLI; |
| 6945 | // if Rn == '1111' then SEE LDRSB (literal); |
| 6946 | // if P == '1' && U == '1' && W == '0' then SEE LDRSBT; |
| 6947 | // if P == '0' && W == '0' then UNDEFINED; |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6948 | if (BitIsClear (opcode, 10) && BitIsClear (opcode, 8)) |
| 6949 | return false; |
| 6950 | |
| 6951 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm8, 32); |
| 6952 | t = Bits32 (opcode, 15, 12); |
| 6953 | n = Bits32 (opcode, 19, 16); |
| 6954 | imm32 = Bits32 (opcode, 7, 0); |
| 6955 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6956 | // index = (P == '1'); add = (U == '1'); wback = (W == '1'); |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6957 | index = BitIsSet (opcode, 10); |
| 6958 | add = BitIsSet (opcode, 9); |
| 6959 | wback = BitIsSet (opcode, 8); |
| 6960 | |
| 6961 | // if BadReg(t) || (wback && n == t) then UNPREDICTABLE; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6962 | if (((t == 13) || ((t == 15) |
| 6963 | && (BitIsClear (opcode, 10) || BitIsSet (opcode, 9) || BitIsSet (opcode, 8)))) |
| 6964 | || (wback && (n == t))) |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6965 | return false; |
| 6966 | |
| 6967 | break; |
| 6968 | |
| 6969 | case eEncodingA1: |
| 6970 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6971 | // if Rn == '1111' then SEE LDRSB (literal); |
| 6972 | // if P == '0' && W == '1' then SEE LDRSBT; |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6973 | // t == UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm4H:imm4L, 32); |
| 6974 | t = Bits32 (opcode, 15, 12); |
| 6975 | n = Bits32 (opcode, 19, 16); |
| 6976 | |
| 6977 | uint32_t imm4H = Bits32 (opcode, 11, 8); |
| 6978 | uint32_t imm4L = Bits32 (opcode, 3, 0); |
Caroline Tice | 40b1a6c | 2011-03-03 00:07:02 +0000 | [diff] [blame] | 6979 | imm32 = (imm4H << 4) | imm4L; |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6980 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6981 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6982 | index = BitIsSet (opcode, 24); |
| 6983 | add = BitIsSet (opcode, 23); |
| 6984 | wback = (BitIsClear (opcode, 24) || BitIsSet (opcode, 21)); |
| 6985 | |
| 6986 | // if t == 15 || (wback && n == t) then UNPREDICTABLE; |
| 6987 | if ((t == 15) || (wback && (n == t))) |
| 6988 | return false; |
| 6989 | |
| 6990 | break; |
| 6991 | } |
| 6992 | |
| 6993 | default: |
| 6994 | return false; |
| 6995 | } |
| 6996 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6997 | uint64_t Rn = ReadCoreReg (n, &success); |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6998 | if (!success) |
| 6999 | return false; |
| 7000 | |
| 7001 | addr_t offset_addr; |
| 7002 | addr_t address; |
| 7003 | |
| 7004 | // offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 7005 | if (add) |
| 7006 | offset_addr = Rn + imm32; |
| 7007 | else |
| 7008 | offset_addr = Rn - imm32; |
| 7009 | |
| 7010 | // address = if index then offset_addr else R[n]; |
| 7011 | if (index) |
| 7012 | address = offset_addr; |
| 7013 | else |
| 7014 | address = Rn; |
| 7015 | |
| 7016 | // R[t] = SignExtend(MemU[address,1], 32); |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 7017 | RegisterInfo base_reg; |
| 7018 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 7019 | |
| 7020 | EmulateInstruction::Context context; |
| 7021 | context.type = eContextRegisterLoad; |
| 7022 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 7023 | |
| 7024 | uint64_t unsigned_data = MemURead (context, address, 1, 0, &success); |
| 7025 | if (!success) |
| 7026 | return false; |
| 7027 | |
| 7028 | int64_t signed_data = llvm::SignExtend64<8>(unsigned_data); |
| 7029 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, (uint64_t) signed_data)) |
| 7030 | return false; |
| 7031 | |
| 7032 | // if wback then R[n] = offset_addr; |
| 7033 | if (wback) |
| 7034 | { |
| 7035 | context.type = eContextAdjustBaseRegister; |
| 7036 | context.SetAddress (offset_addr); |
| 7037 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 7038 | return false; |
| 7039 | } |
| 7040 | } |
| 7041 | |
| 7042 | return true; |
| 7043 | } |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 7044 | |
Caroline Tice | 5f59391 | 2011-03-01 22:25:17 +0000 | [diff] [blame] | 7045 | // LDRSB (literal) calculates an address from the PC value and an immediate offset, loads a byte from memory, |
| 7046 | // sign-extends it to form a 32-bit word, and writes tit to a register. |
| 7047 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7048 | EmulateInstructionARM::EmulateLDRSBLiteral (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 5f59391 | 2011-03-01 22:25:17 +0000 | [diff] [blame] | 7049 | { |
| 7050 | #if 0 |
| 7051 | if ConditionPassed() then |
| 7052 | EncodingSpecificOperations(); NullCheckIfThumbEE(15); |
| 7053 | base = Align(PC,4); |
| 7054 | address = if add then (base + imm32) else (base - imm32); |
| 7055 | R[t] = SignExtend(MemU[address,1], 32); |
| 7056 | #endif |
| 7057 | |
| 7058 | bool success = false; |
Caroline Tice | 5f59391 | 2011-03-01 22:25:17 +0000 | [diff] [blame] | 7059 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7060 | if (ConditionPassed(opcode)) |
Caroline Tice | 5f59391 | 2011-03-01 22:25:17 +0000 | [diff] [blame] | 7061 | { |
| 7062 | uint32_t t; |
| 7063 | uint32_t imm32; |
| 7064 | bool add; |
| 7065 | |
| 7066 | // EncodingSpecificOperations(); NullCheckIfThumbEE(15); |
| 7067 | switch (encoding) |
| 7068 | { |
| 7069 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7070 | // if Rt == '1111' then SEE PLI; |
| 7071 | // t = UInt(Rt); imm32 = ZeroExtend(imm12, 32); add = (U == '1'); |
Caroline Tice | 5f59391 | 2011-03-01 22:25:17 +0000 | [diff] [blame] | 7072 | t = Bits32 (opcode, 15, 12); |
| 7073 | imm32 = Bits32 (opcode, 11, 0); |
| 7074 | add = BitIsSet (opcode, 23); |
| 7075 | |
| 7076 | // if t == 13 then UNPREDICTABLE; |
| 7077 | if (t == 13) |
| 7078 | return false; |
| 7079 | |
| 7080 | break; |
| 7081 | |
| 7082 | case eEncodingA1: |
| 7083 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7084 | // t == UInt(Rt); imm32 = ZeroExtend(imm4H:imm4L, 32); add = (U == '1'); |
Caroline Tice | 5f59391 | 2011-03-01 22:25:17 +0000 | [diff] [blame] | 7085 | t = Bits32 (opcode, 15, 12); |
| 7086 | uint32_t imm4H = Bits32 (opcode, 11, 8); |
| 7087 | uint32_t imm4L = Bits32 (opcode, 3, 0); |
Caroline Tice | 40b1a6c | 2011-03-03 00:07:02 +0000 | [diff] [blame] | 7088 | imm32 = (imm4H << 4) | imm4L; |
Caroline Tice | 5f59391 | 2011-03-01 22:25:17 +0000 | [diff] [blame] | 7089 | add = BitIsSet (opcode, 23); |
| 7090 | |
| 7091 | // if t == 15 then UNPREDICTABLE; |
| 7092 | if (t == 15) |
| 7093 | return false; |
| 7094 | |
| 7095 | break; |
| 7096 | } |
| 7097 | |
| 7098 | default: |
| 7099 | return false; |
| 7100 | } |
| 7101 | |
| 7102 | // base = Align(PC,4); |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 7103 | uint64_t pc_value = ReadCoreReg (PC_REG, &success); |
Caroline Tice | 5f59391 | 2011-03-01 22:25:17 +0000 | [diff] [blame] | 7104 | if (!success) |
| 7105 | return false; |
| 7106 | uint64_t base = AlignPC (pc_value); |
| 7107 | |
| 7108 | // address = if add then (base + imm32) else (base - imm32); |
| 7109 | addr_t address; |
| 7110 | if (add) |
| 7111 | address = base + imm32; |
| 7112 | else |
| 7113 | address = base - imm32; |
| 7114 | |
| 7115 | // R[t] = SignExtend(MemU[address,1], 32); |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 7116 | RegisterInfo base_reg; |
| 7117 | GetRegisterInfo (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC, base_reg); |
Caroline Tice | 5f59391 | 2011-03-01 22:25:17 +0000 | [diff] [blame] | 7118 | |
| 7119 | EmulateInstruction::Context context; |
| 7120 | context.type = eContextRegisterLoad; |
| 7121 | context.SetRegisterPlusOffset (base_reg, address - base); |
| 7122 | |
| 7123 | uint64_t unsigned_data = MemURead (context, address, 1, 0, &success); |
| 7124 | if (!success) |
| 7125 | return false; |
| 7126 | |
| 7127 | int64_t signed_data = llvm::SignExtend64<8>(unsigned_data); |
| 7128 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, (uint64_t) signed_data)) |
| 7129 | return false; |
| 7130 | } |
| 7131 | return true; |
| 7132 | } |
| 7133 | |
Caroline Tice | 672f311 | 2011-03-01 23:55:59 +0000 | [diff] [blame] | 7134 | // LDRSB (register) calculates an address from a base register value and an offset register value, loadsa byte from |
| 7135 | // memory, sign-extends it to form a 32-bit word, and writes it to a register. The offset register value can be |
| 7136 | // shifted left by 0, 1, 2, or 3 bits. |
| 7137 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7138 | EmulateInstructionARM::EmulateLDRSBRegister (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 672f311 | 2011-03-01 23:55:59 +0000 | [diff] [blame] | 7139 | { |
| 7140 | #if 0 |
| 7141 | if ConditionPassed() then |
| 7142 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 7143 | offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 7144 | offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 7145 | address = if index then offset_addr else R[n]; |
| 7146 | R[t] = SignExtend(MemU[address,1], 32); |
| 7147 | if wback then R[n] = offset_addr; |
| 7148 | #endif |
| 7149 | |
| 7150 | bool success = false; |
Caroline Tice | 672f311 | 2011-03-01 23:55:59 +0000 | [diff] [blame] | 7151 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7152 | if (ConditionPassed(opcode)) |
Caroline Tice | 672f311 | 2011-03-01 23:55:59 +0000 | [diff] [blame] | 7153 | { |
| 7154 | uint32_t t; |
| 7155 | uint32_t n; |
| 7156 | uint32_t m; |
| 7157 | bool index; |
| 7158 | bool add; |
| 7159 | bool wback; |
| 7160 | ARM_ShifterType shift_t; |
| 7161 | uint32_t shift_n; |
| 7162 | |
| 7163 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 7164 | switch (encoding) |
| 7165 | { |
| 7166 | case eEncodingT1: |
| 7167 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 7168 | t = Bits32 (opcode, 2, 0); |
| 7169 | n = Bits32 (opcode, 5, 3); |
| 7170 | m = Bits32 (opcode, 8, 6); |
| 7171 | |
| 7172 | // index = TRUE; add = TRUE; wback = FALSE; |
| 7173 | index = true; |
| 7174 | add = true; |
| 7175 | wback = false; |
| 7176 | |
| 7177 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 7178 | shift_t = SRType_LSL; |
| 7179 | shift_n = 0; |
| 7180 | |
| 7181 | break; |
| 7182 | |
| 7183 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7184 | // if Rt == '1111' then SEE PLI; |
| 7185 | // if Rn == '1111' then SEE LDRSB (literal); |
Caroline Tice | 672f311 | 2011-03-01 23:55:59 +0000 | [diff] [blame] | 7186 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 7187 | t = Bits32 (opcode, 15, 12); |
| 7188 | n = Bits32 (opcode, 19, 16); |
| 7189 | m = Bits32 (opcode, 3, 0); |
| 7190 | |
| 7191 | // index = TRUE; add = TRUE; wback = FALSE; |
| 7192 | index = true; |
| 7193 | add = true; |
| 7194 | wback = false; |
| 7195 | |
| 7196 | // (shift_t, shift_n) = (SRType_LSL, UInt(imm2)); |
| 7197 | shift_t = SRType_LSL; |
| 7198 | shift_n = Bits32 (opcode, 5, 4); |
| 7199 | |
| 7200 | // if t == 13 || BadReg(m) then UNPREDICTABLE; |
| 7201 | if ((t == 13) || BadReg (m)) |
| 7202 | return false; |
| 7203 | break; |
| 7204 | |
| 7205 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7206 | // if P == '0' && W == '1' then SEE LDRSBT; |
Caroline Tice | 672f311 | 2011-03-01 23:55:59 +0000 | [diff] [blame] | 7207 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 7208 | t = Bits32 (opcode, 15, 12); |
| 7209 | n = Bits32 (opcode, 19, 16); |
| 7210 | m = Bits32 (opcode, 3, 0); |
| 7211 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7212 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
Caroline Tice | 672f311 | 2011-03-01 23:55:59 +0000 | [diff] [blame] | 7213 | index = BitIsSet (opcode, 24); |
| 7214 | add = BitIsSet (opcode, 23); |
| 7215 | wback = BitIsClear (opcode, 24) || BitIsSet (opcode, 21); |
| 7216 | |
| 7217 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 7218 | shift_t = SRType_LSL; |
| 7219 | shift_n = 0; |
| 7220 | |
| 7221 | // if t == 15 || m == 15 then UNPREDICTABLE; |
| 7222 | if ((t == 15) || (m == 15)) |
| 7223 | return false; |
| 7224 | |
| 7225 | // if wback && (n == 15 || n == t) then UNPREDICTABLE; |
| 7226 | if (wback && ((n == 15) || (n == t))) |
| 7227 | return false; |
| 7228 | break; |
| 7229 | |
| 7230 | default: |
| 7231 | return false; |
| 7232 | } |
| 7233 | |
| 7234 | uint64_t Rm = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 7235 | if (!success) |
| 7236 | return false; |
| 7237 | |
| 7238 | // offset = Shift(R[m], shift_t, shift_n, APSR.C); |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 7239 | addr_t offset = Shift (Rm, shift_t, shift_n, APSR_C, &success); |
| 7240 | if (!success) |
| 7241 | return false; |
Caroline Tice | 672f311 | 2011-03-01 23:55:59 +0000 | [diff] [blame] | 7242 | |
| 7243 | addr_t offset_addr; |
| 7244 | addr_t address; |
| 7245 | |
| 7246 | // offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 7247 | uint64_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 7248 | if (!success) |
| 7249 | return false; |
| 7250 | |
| 7251 | if (add) |
| 7252 | offset_addr = Rn + offset; |
| 7253 | else |
| 7254 | offset_addr = Rn - offset; |
| 7255 | |
| 7256 | // address = if index then offset_addr else R[n]; |
| 7257 | if (index) |
| 7258 | address = offset_addr; |
| 7259 | else |
| 7260 | address = Rn; |
| 7261 | |
| 7262 | // R[t] = SignExtend(MemU[address,1], 32); |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 7263 | RegisterInfo base_reg; |
| 7264 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
| 7265 | RegisterInfo offset_reg; |
| 7266 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + m, offset_reg); |
Caroline Tice | 672f311 | 2011-03-01 23:55:59 +0000 | [diff] [blame] | 7267 | |
| 7268 | EmulateInstruction::Context context; |
| 7269 | context.type = eContextRegisterLoad; |
| 7270 | context.SetRegisterPlusIndirectOffset (base_reg, offset_reg); |
| 7271 | |
| 7272 | uint64_t unsigned_data = MemURead (context, address, 1, 0, &success); |
| 7273 | if (!success) |
| 7274 | return false; |
| 7275 | |
| 7276 | int64_t signed_data = llvm::SignExtend64<8>(unsigned_data); |
| 7277 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, (uint64_t) signed_data)) |
| 7278 | return false; |
| 7279 | |
| 7280 | // if wback then R[n] = offset_addr; |
| 7281 | if (wback) |
| 7282 | { |
| 7283 | context.type = eContextAdjustBaseRegister; |
| 7284 | context.SetAddress (offset_addr); |
| 7285 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 7286 | return false; |
| 7287 | } |
| 7288 | } |
| 7289 | return true; |
| 7290 | } |
| 7291 | |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7292 | // LDRSH (immediate) calculates an address from a base register value and an immediate offset, loads a halfword from |
| 7293 | // memory, sign-extends it to form a 32-bit word, and writes it to a register. It can use offset, post-indexed, or |
| 7294 | // pre-indexed addressing. |
| 7295 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7296 | EmulateInstructionARM::EmulateLDRSHImmediate (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7297 | { |
| 7298 | #if 0 |
| 7299 | if ConditionPassed() then |
| 7300 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 7301 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 7302 | address = if index then offset_addr else R[n]; |
| 7303 | data = MemU[address,2]; |
| 7304 | if wback then R[n] = offset_addr; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7305 | if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7306 | R[t] = SignExtend(data, 32); |
| 7307 | else // Can only apply before ARMv7 |
| 7308 | R[t] = bits(32) UNKNOWN; |
| 7309 | #endif |
| 7310 | |
| 7311 | bool success = false; |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7312 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7313 | if (ConditionPassed(opcode)) |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7314 | { |
| 7315 | uint32_t t; |
| 7316 | uint32_t n; |
| 7317 | uint32_t imm32; |
| 7318 | bool index; |
| 7319 | bool add; |
| 7320 | bool wback; |
| 7321 | |
| 7322 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 7323 | switch (encoding) |
| 7324 | { |
| 7325 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7326 | // if Rn == '1111' then SEE LDRSH (literal); |
| 7327 | // if Rt == '1111' then SEE "Unallocated memory hints"; |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7328 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 7329 | t = Bits32 (opcode, 15, 12); |
| 7330 | n = Bits32 (opcode, 19, 16); |
| 7331 | imm32 = Bits32 (opcode, 11, 0); |
| 7332 | |
| 7333 | // index = TRUE; add = TRUE; wback = FALSE; |
| 7334 | index = true; |
| 7335 | add = true; |
| 7336 | wback = false; |
| 7337 | |
| 7338 | // if t == 13 then UNPREDICTABLE; |
| 7339 | if (t == 13) |
| 7340 | return false; |
| 7341 | |
| 7342 | break; |
| 7343 | |
| 7344 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7345 | // if Rn == '1111' then SEE LDRSH (literal); |
| 7346 | // if Rt == '1111' && P == '1' && U == '0' && W == '0' then SEE "Unallocated memory hints"; |
| 7347 | // if P == '1' && U == '1' && W == '0' then SEE LDRSHT; |
| 7348 | // if P == '0' && W == '0' then UNDEFINED; |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7349 | if (BitIsClear (opcode, 10) && BitIsClear (opcode, 8)) |
| 7350 | return false; |
| 7351 | |
| 7352 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm8, 32); |
| 7353 | t = Bits32 (opcode, 15, 12); |
| 7354 | n = Bits32 (opcode, 19, 16); |
| 7355 | imm32 = Bits32 (opcode, 7, 0); |
| 7356 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7357 | // index = (P == '1'); add = (U == '1'); wback = (W == '1'); |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7358 | index = BitIsSet (opcode, 10); |
| 7359 | add = BitIsSet (opcode, 9); |
| 7360 | wback = BitIsSet (opcode, 8); |
| 7361 | |
| 7362 | // if BadReg(t) || (wback && n == t) then UNPREDICTABLE; |
| 7363 | if (BadReg (t) || (wback && (n == t))) |
| 7364 | return false; |
| 7365 | |
| 7366 | break; |
| 7367 | |
| 7368 | case eEncodingA1: |
| 7369 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7370 | // if Rn == '1111' then SEE LDRSH (literal); |
| 7371 | // if P == '0' && W == '1' then SEE LDRSHT; |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7372 | // t == UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm4H:imm4L, 32); |
| 7373 | t = Bits32 (opcode, 15, 12); |
| 7374 | n = Bits32 (opcode, 19, 16); |
| 7375 | uint32_t imm4H = Bits32 (opcode, 11,8); |
| 7376 | uint32_t imm4L = Bits32 (opcode, 3, 0); |
Caroline Tice | 40b1a6c | 2011-03-03 00:07:02 +0000 | [diff] [blame] | 7377 | imm32 = (imm4H << 4) | imm4L; |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7378 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7379 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7380 | index = BitIsSet (opcode, 24); |
| 7381 | add = BitIsSet (opcode, 23); |
| 7382 | wback = BitIsClear (opcode, 24) || BitIsSet (opcode, 21); |
| 7383 | |
| 7384 | // if t == 15 || (wback && n == t) then UNPREDICTABLE; |
| 7385 | if ((t == 15) || (wback && (n == t))) |
| 7386 | return false; |
| 7387 | |
| 7388 | break; |
| 7389 | } |
| 7390 | |
| 7391 | default: |
| 7392 | return false; |
| 7393 | } |
| 7394 | |
| 7395 | // offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 7396 | uint64_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 7397 | if (!success) |
| 7398 | return false; |
| 7399 | |
| 7400 | addr_t offset_addr; |
| 7401 | if (add) |
| 7402 | offset_addr = Rn + imm32; |
| 7403 | else |
| 7404 | offset_addr = Rn - imm32; |
| 7405 | |
| 7406 | // address = if index then offset_addr else R[n]; |
| 7407 | addr_t address; |
| 7408 | if (index) |
| 7409 | address = offset_addr; |
| 7410 | else |
| 7411 | address = Rn; |
| 7412 | |
| 7413 | // data = MemU[address,2]; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 7414 | RegisterInfo base_reg; |
| 7415 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7416 | |
| 7417 | EmulateInstruction::Context context; |
| 7418 | context.type = eContextRegisterLoad; |
| 7419 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 7420 | |
| 7421 | uint64_t data = MemURead (context, address, 2, 0, &success); |
| 7422 | if (!success) |
| 7423 | return false; |
| 7424 | |
| 7425 | // if wback then R[n] = offset_addr; |
| 7426 | if (wback) |
| 7427 | { |
| 7428 | context.type = eContextAdjustBaseRegister; |
| 7429 | context.SetAddress (offset_addr); |
| 7430 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 7431 | return false; |
| 7432 | } |
| 7433 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7434 | // if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7435 | if (UnalignedSupport() || BitIsClear (address, 0)) |
| 7436 | { |
| 7437 | // R[t] = SignExtend(data, 32); |
| 7438 | int64_t signed_data = llvm::SignExtend64<16>(data); |
| 7439 | context.type = eContextRegisterLoad; |
| 7440 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 7441 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, (uint64_t) signed_data)) |
| 7442 | return false; |
| 7443 | } |
| 7444 | else // Can only apply before ARMv7 |
| 7445 | { |
| 7446 | // R[t] = bits(32) UNKNOWN; |
| 7447 | WriteBits32Unknown (t); |
| 7448 | } |
| 7449 | } |
| 7450 | return true; |
| 7451 | } |
| 7452 | |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7453 | // LDRSH (literal) calculates an address from the PC value and an immediate offset, loads a halfword from memory, |
| 7454 | // sign-extends it to from a 32-bit word, and writes it to a register. |
| 7455 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7456 | EmulateInstructionARM::EmulateLDRSHLiteral (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7457 | { |
| 7458 | #if 0 |
| 7459 | if ConditionPassed() then |
| 7460 | EncodingSpecificOperations(); NullCheckIfThumbEE(15); |
| 7461 | base = Align(PC,4); |
| 7462 | address = if add then (base + imm32) else (base - imm32); |
| 7463 | data = MemU[address,2]; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7464 | if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7465 | R[t] = SignExtend(data, 32); |
| 7466 | else // Can only apply before ARMv7 |
| 7467 | R[t] = bits(32) UNKNOWN; |
| 7468 | #endif |
| 7469 | |
| 7470 | bool success = false; |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7471 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7472 | if (ConditionPassed(opcode)) |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7473 | { |
| 7474 | uint32_t t; |
| 7475 | uint32_t imm32; |
| 7476 | bool add; |
| 7477 | |
| 7478 | // EncodingSpecificOperations(); NullCheckIfThumbEE(15); |
| 7479 | switch (encoding) |
| 7480 | { |
| 7481 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7482 | // if Rt == '1111' then SEE "Unallocated memory hints"; |
| 7483 | // t = UInt(Rt); imm32 = ZeroExtend(imm12, 32); add = (U == '1'); |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7484 | t = Bits32 (opcode, 15, 12); |
| 7485 | imm32 = Bits32 (opcode, 11, 0); |
| 7486 | add = BitIsSet (opcode, 23); |
| 7487 | |
| 7488 | // if t == 13 then UNPREDICTABLE; |
| 7489 | if (t == 13) |
| 7490 | return false; |
| 7491 | |
| 7492 | break; |
| 7493 | |
| 7494 | case eEncodingA1: |
| 7495 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7496 | // t == UInt(Rt); imm32 = ZeroExtend(imm4H:imm4L, 32); add = (U == '1'); |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7497 | t = Bits32 (opcode, 15, 12); |
| 7498 | uint32_t imm4H = Bits32 (opcode, 11, 8); |
| 7499 | uint32_t imm4L = Bits32 (opcode, 3, 0); |
Caroline Tice | 40b1a6c | 2011-03-03 00:07:02 +0000 | [diff] [blame] | 7500 | imm32 = (imm4H << 4) | imm4L; |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7501 | add = BitIsSet (opcode, 23); |
| 7502 | |
| 7503 | // if t == 15 then UNPREDICTABLE; |
| 7504 | if (t == 15) |
| 7505 | return false; |
| 7506 | |
| 7507 | break; |
| 7508 | } |
| 7509 | default: |
| 7510 | return false; |
| 7511 | } |
| 7512 | |
| 7513 | // base = Align(PC,4); |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 7514 | uint64_t pc_value = ReadCoreReg (PC_REG, &success); |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7515 | if (!success) |
| 7516 | return false; |
| 7517 | |
| 7518 | uint64_t base = AlignPC (pc_value); |
| 7519 | |
| 7520 | addr_t address; |
| 7521 | // address = if add then (base + imm32) else (base - imm32); |
| 7522 | if (add) |
| 7523 | address = base + imm32; |
| 7524 | else |
| 7525 | address = base - imm32; |
| 7526 | |
| 7527 | // data = MemU[address,2]; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 7528 | RegisterInfo base_reg; |
| 7529 | GetRegisterInfo (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC, base_reg); |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7530 | |
| 7531 | EmulateInstruction::Context context; |
| 7532 | context.type = eContextRegisterLoad; |
| 7533 | context.SetRegisterPlusOffset (base_reg, imm32); |
| 7534 | |
| 7535 | uint64_t data = MemURead (context, address, 2, 0, &success); |
| 7536 | if (!success) |
| 7537 | return false; |
| 7538 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7539 | // if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7540 | if (UnalignedSupport() || BitIsClear (address, 0)) |
| 7541 | { |
| 7542 | // R[t] = SignExtend(data, 32); |
| 7543 | int64_t signed_data = llvm::SignExtend64<16>(data); |
| 7544 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, (uint64_t) signed_data)) |
| 7545 | return false; |
| 7546 | } |
| 7547 | else // Can only apply before ARMv7 |
| 7548 | { |
| 7549 | // R[t] = bits(32) UNKNOWN; |
| 7550 | WriteBits32Unknown (t); |
| 7551 | } |
| 7552 | } |
| 7553 | return true; |
| 7554 | } |
| 7555 | |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7556 | // LDRSH (register) calculates an address from a base register value and an offset register value, loads a halfword |
| 7557 | // from memory, sign-extends it to form a 32-bit word, and writes it to a register. The offset register value can be |
| 7558 | // shifted left by 0, 1, 2, or 3 bits. |
| 7559 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7560 | EmulateInstructionARM::EmulateLDRSHRegister (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7561 | { |
| 7562 | #if 0 |
| 7563 | if ConditionPassed() then |
| 7564 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 7565 | offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 7566 | offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 7567 | address = if index then offset_addr else R[n]; |
| 7568 | data = MemU[address,2]; |
| 7569 | if wback then R[n] = offset_addr; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7570 | if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7571 | R[t] = SignExtend(data, 32); |
| 7572 | else // Can only apply before ARMv7 |
| 7573 | R[t] = bits(32) UNKNOWN; |
| 7574 | #endif |
| 7575 | |
| 7576 | bool success = false; |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7577 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7578 | if (ConditionPassed(opcode)) |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7579 | { |
| 7580 | uint32_t t; |
| 7581 | uint32_t n; |
| 7582 | uint32_t m; |
| 7583 | bool index; |
| 7584 | bool add; |
| 7585 | bool wback; |
| 7586 | ARM_ShifterType shift_t; |
| 7587 | uint32_t shift_n; |
| 7588 | |
| 7589 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 7590 | switch (encoding) |
| 7591 | { |
| 7592 | case eEncodingT1: |
| 7593 | // if CurrentInstrSet() == InstrSet_ThumbEE then SEE "Modified operation in ThumbEE"; |
| 7594 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 7595 | t = Bits32 (opcode, 2, 0); |
| 7596 | n = Bits32 (opcode, 5, 3); |
| 7597 | m = Bits32 (opcode, 8, 6); |
| 7598 | |
| 7599 | // index = TRUE; add = TRUE; wback = FALSE; |
| 7600 | index = true; |
| 7601 | add = true; |
| 7602 | wback = false; |
| 7603 | |
| 7604 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 7605 | shift_t = SRType_LSL; |
| 7606 | shift_n = 0; |
| 7607 | |
| 7608 | break; |
| 7609 | |
| 7610 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7611 | // if Rn == '1111' then SEE LDRSH (literal); |
| 7612 | // if Rt == '1111' then SEE "Unallocated memory hints"; |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7613 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 7614 | t = Bits32 (opcode, 15, 12); |
| 7615 | n = Bits32 (opcode, 19, 16); |
| 7616 | m = Bits32 (opcode, 3, 0); |
| 7617 | |
| 7618 | // index = TRUE; add = TRUE; wback = FALSE; |
| 7619 | index = true; |
| 7620 | add = true; |
| 7621 | wback = false; |
| 7622 | |
| 7623 | // (shift_t, shift_n) = (SRType_LSL, UInt(imm2)); |
| 7624 | shift_t = SRType_LSL; |
| 7625 | shift_n = Bits32 (opcode, 5, 4); |
| 7626 | |
| 7627 | // if t == 13 || BadReg(m) then UNPREDICTABLE; |
| 7628 | if ((t == 13) || BadReg (m)) |
| 7629 | return false; |
| 7630 | |
| 7631 | break; |
| 7632 | |
| 7633 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7634 | // if P == '0' && W == '1' then SEE LDRSHT; |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7635 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 7636 | t = Bits32 (opcode, 15, 12); |
| 7637 | n = Bits32 (opcode, 19, 16); |
| 7638 | m = Bits32 (opcode, 3, 0); |
| 7639 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7640 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7641 | index = BitIsSet (opcode, 24); |
| 7642 | add = BitIsSet (opcode, 23); |
| 7643 | wback = BitIsClear (opcode, 24) || BitIsSet (opcode, 21); |
| 7644 | |
| 7645 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 7646 | shift_t = SRType_LSL; |
| 7647 | shift_n = 0; |
| 7648 | |
| 7649 | // if t == 15 || m == 15 then UNPREDICTABLE; |
| 7650 | if ((t == 15) || (m == 15)) |
| 7651 | return false; |
| 7652 | |
| 7653 | // if wback && (n == 15 || n == t) then UNPREDICTABLE; |
| 7654 | if (wback && ((n == 15) || (n == t))) |
| 7655 | return false; |
| 7656 | |
| 7657 | break; |
| 7658 | |
| 7659 | default: |
Johnny Chen | 6ac9e54 | 2011-08-16 01:16:02 +0000 | [diff] [blame] | 7660 | return false; |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7661 | } |
| 7662 | |
| 7663 | uint64_t Rm = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 7664 | if (!success) |
| 7665 | return false; |
| 7666 | |
| 7667 | uint64_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 7668 | if (!success) |
| 7669 | return false; |
| 7670 | |
| 7671 | // offset = Shift(R[m], shift_t, shift_n, APSR.C); |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 7672 | addr_t offset = Shift (Rm, shift_t, shift_n, APSR_C, &success); |
| 7673 | if (!success) |
| 7674 | return false; |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7675 | |
| 7676 | addr_t offset_addr; |
| 7677 | addr_t address; |
| 7678 | |
| 7679 | // offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 7680 | if (add) |
| 7681 | offset_addr = Rn + offset; |
| 7682 | else |
| 7683 | offset_addr = Rn - offset; |
| 7684 | |
| 7685 | // address = if index then offset_addr else R[n]; |
| 7686 | if (index) |
| 7687 | address = offset_addr; |
| 7688 | else |
| 7689 | address = Rn; |
| 7690 | |
| 7691 | // data = MemU[address,2]; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 7692 | RegisterInfo base_reg; |
| 7693 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7694 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 7695 | RegisterInfo offset_reg; |
| 7696 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + m, offset_reg); |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7697 | |
| 7698 | EmulateInstruction::Context context; |
| 7699 | context.type = eContextRegisterLoad; |
| 7700 | context.SetRegisterPlusIndirectOffset (base_reg, offset_reg); |
| 7701 | |
| 7702 | uint64_t data = MemURead (context, address, 2, 0, &success); |
| 7703 | if (!success) |
| 7704 | return false; |
| 7705 | |
| 7706 | // if wback then R[n] = offset_addr; |
| 7707 | if (wback) |
| 7708 | { |
| 7709 | context.type = eContextAdjustBaseRegister; |
| 7710 | context.SetAddress (offset_addr); |
| 7711 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 7712 | return false; |
| 7713 | } |
| 7714 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7715 | // if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7716 | if (UnalignedSupport() || BitIsClear (address, 0)) |
| 7717 | { |
| 7718 | // R[t] = SignExtend(data, 32); |
| 7719 | context.type = eContextRegisterLoad; |
| 7720 | context.SetRegisterPlusIndirectOffset (base_reg, offset_reg); |
| 7721 | |
| 7722 | int64_t signed_data = llvm::SignExtend64<16>(data); |
| 7723 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, (uint64_t) signed_data)) |
| 7724 | return false; |
| 7725 | } |
| 7726 | else // Can only apply before ARMv7 |
| 7727 | { |
| 7728 | // R[t] = bits(32) UNKNOWN; |
| 7729 | WriteBits32Unknown (t); |
| 7730 | } |
| 7731 | } |
| 7732 | return true; |
| 7733 | } |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7734 | |
| 7735 | // SXTB extracts an 8-bit value from a register, sign-extends it to 32 bits, and writes the result to the destination |
| 7736 | // register. You can specifiy a rotation by 0, 8, 16, or 24 bits before extracting the 8-bit value. |
| 7737 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7738 | EmulateInstructionARM::EmulateSXTB (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7739 | { |
| 7740 | #if 0 |
| 7741 | if ConditionPassed() then |
| 7742 | EncodingSpecificOperations(); |
| 7743 | rotated = ROR(R[m], rotation); |
| 7744 | R[d] = SignExtend(rotated<7:0>, 32); |
| 7745 | #endif |
| 7746 | |
| 7747 | bool success = false; |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7748 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7749 | if (ConditionPassed(opcode)) |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7750 | { |
| 7751 | uint32_t d; |
| 7752 | uint32_t m; |
| 7753 | uint32_t rotation; |
| 7754 | |
| 7755 | // EncodingSpecificOperations(); |
| 7756 | switch (encoding) |
| 7757 | { |
| 7758 | case eEncodingT1: |
| 7759 | // d = UInt(Rd); m = UInt(Rm); rotation = 0; |
| 7760 | d = Bits32 (opcode, 2, 0); |
| 7761 | m = Bits32 (opcode, 5, 3); |
| 7762 | rotation = 0; |
| 7763 | |
| 7764 | break; |
| 7765 | |
| 7766 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7767 | // d = UInt(Rd); m = UInt(Rm); rotation = UInt(rotate:'000'); |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7768 | d = Bits32 (opcode, 11, 8); |
| 7769 | m = Bits32 (opcode, 3, 0); |
| 7770 | rotation = Bits32 (opcode, 5, 4) << 3; |
| 7771 | |
| 7772 | // if BadReg(d) || BadReg(m) then UNPREDICTABLE; |
| 7773 | if (BadReg (d) || BadReg (m)) |
| 7774 | return false; |
| 7775 | |
| 7776 | break; |
| 7777 | |
| 7778 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7779 | // d = UInt(Rd); m = UInt(Rm); rotation = UInt(rotate:'000'); |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7780 | d = Bits32 (opcode, 15, 12); |
| 7781 | m = Bits32 (opcode, 3, 0); |
| 7782 | rotation = Bits32 (opcode, 11, 10) << 3; |
| 7783 | |
| 7784 | // if d == 15 || m == 15 then UNPREDICTABLE; |
| 7785 | if ((d == 15) || (m == 15)) |
| 7786 | return false; |
| 7787 | |
| 7788 | break; |
| 7789 | |
| 7790 | default: |
| 7791 | return false; |
| 7792 | } |
| 7793 | |
Caroline Tice | 868198b | 2011-03-03 18:04:49 +0000 | [diff] [blame] | 7794 | uint64_t Rm = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 7795 | if (!success) |
| 7796 | return false; |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7797 | |
| 7798 | // rotated = ROR(R[m], rotation); |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 7799 | uint64_t rotated = ROR (Rm, rotation, &success); |
| 7800 | if (!success) |
| 7801 | return false; |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7802 | |
| 7803 | // R[d] = SignExtend(rotated<7:0>, 32); |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7804 | int64_t data = llvm::SignExtend64<8>(rotated); |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7805 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 7806 | RegisterInfo source_reg; |
| 7807 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + m, source_reg); |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7808 | |
| 7809 | EmulateInstruction::Context context; |
| 7810 | context.type = eContextRegisterLoad; |
| 7811 | context.SetRegister (source_reg); |
| 7812 | |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7813 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + d, (uint64_t) data)) |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7814 | return false; |
| 7815 | } |
| 7816 | return true; |
| 7817 | } |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7818 | |
Caroline Tice | 868198b | 2011-03-03 18:04:49 +0000 | [diff] [blame] | 7819 | // SXTH extracts a 16-bit value from a register, sign-extends it to 32 bits, and writes the result to the destination |
| 7820 | // register. You can specify a rotation by 0, 8, 16, or 24 bits before extracting the 16-bit value. |
| 7821 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7822 | EmulateInstructionARM::EmulateSXTH (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 868198b | 2011-03-03 18:04:49 +0000 | [diff] [blame] | 7823 | { |
| 7824 | #if 0 |
| 7825 | if ConditionPassed() then |
| 7826 | EncodingSpecificOperations(); |
| 7827 | rotated = ROR(R[m], rotation); |
| 7828 | R[d] = SignExtend(rotated<15:0>, 32); |
| 7829 | #endif |
| 7830 | |
| 7831 | bool success = false; |
Caroline Tice | 868198b | 2011-03-03 18:04:49 +0000 | [diff] [blame] | 7832 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7833 | if (ConditionPassed(opcode)) |
Caroline Tice | 868198b | 2011-03-03 18:04:49 +0000 | [diff] [blame] | 7834 | { |
| 7835 | uint32_t d; |
| 7836 | uint32_t m; |
| 7837 | uint32_t rotation; |
| 7838 | |
| 7839 | // EncodingSpecificOperations(); |
| 7840 | switch (encoding) |
| 7841 | { |
| 7842 | case eEncodingT1: |
| 7843 | // d = UInt(Rd); m = UInt(Rm); rotation = 0; |
| 7844 | d = Bits32 (opcode, 2, 0); |
| 7845 | m = Bits32 (opcode, 5, 3); |
| 7846 | rotation = 0; |
| 7847 | |
| 7848 | break; |
| 7849 | |
| 7850 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7851 | // d = UInt(Rd); m = UInt(Rm); rotation = UInt(rotate:'000'); |
Caroline Tice | 868198b | 2011-03-03 18:04:49 +0000 | [diff] [blame] | 7852 | d = Bits32 (opcode, 11, 8); |
| 7853 | m = Bits32 (opcode, 3, 0); |
| 7854 | rotation = Bits32 (opcode, 5, 4) << 3; |
| 7855 | |
| 7856 | // if BadReg(d) || BadReg(m) then UNPREDICTABLE; |
| 7857 | if (BadReg (d) || BadReg (m)) |
| 7858 | return false; |
| 7859 | |
| 7860 | break; |
| 7861 | |
| 7862 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7863 | // d = UInt(Rd); m = UInt(Rm); rotation = UInt(rotate:'000'); |
Caroline Tice | 868198b | 2011-03-03 18:04:49 +0000 | [diff] [blame] | 7864 | d = Bits32 (opcode, 15, 12); |
| 7865 | m = Bits32 (opcode, 3, 0); |
| 7866 | rotation = Bits32 (opcode, 11, 10) << 3; |
| 7867 | |
| 7868 | // if d == 15 || m == 15 then UNPREDICTABLE; |
| 7869 | if ((d == 15) || (m == 15)) |
| 7870 | return false; |
| 7871 | |
| 7872 | break; |
| 7873 | |
| 7874 | default: |
| 7875 | return false; |
| 7876 | } |
| 7877 | |
| 7878 | uint64_t Rm = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 7879 | if (!success) |
| 7880 | return false; |
| 7881 | |
| 7882 | // rotated = ROR(R[m], rotation); |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 7883 | uint64_t rotated = ROR (Rm, rotation, &success); |
| 7884 | if (!success) |
| 7885 | return false; |
Caroline Tice | 868198b | 2011-03-03 18:04:49 +0000 | [diff] [blame] | 7886 | |
| 7887 | // R[d] = SignExtend(rotated<15:0>, 32); |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 7888 | RegisterInfo source_reg; |
| 7889 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + m, source_reg); |
Caroline Tice | 868198b | 2011-03-03 18:04:49 +0000 | [diff] [blame] | 7890 | |
| 7891 | EmulateInstruction::Context context; |
| 7892 | context.type = eContextRegisterLoad; |
| 7893 | context.SetRegister (source_reg); |
| 7894 | |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7895 | int64_t data = llvm::SignExtend64<16> (rotated); |
| 7896 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + d, (uint64_t) data)) |
Caroline Tice | 868198b | 2011-03-03 18:04:49 +0000 | [diff] [blame] | 7897 | return false; |
| 7898 | } |
| 7899 | |
| 7900 | return true; |
| 7901 | } |
| 7902 | |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7903 | // UXTB extracts an 8-bit value from a register, zero-extneds it to 32 bits, and writes the result to the destination |
| 7904 | // register. You can specify a rotation by 0, 8, 16, or 24 bits before extracting the 8-bit value. |
| 7905 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7906 | EmulateInstructionARM::EmulateUXTB (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7907 | { |
| 7908 | #if 0 |
| 7909 | if ConditionPassed() then |
| 7910 | EncodingSpecificOperations(); |
| 7911 | rotated = ROR(R[m], rotation); |
| 7912 | R[d] = ZeroExtend(rotated<7:0>, 32); |
| 7913 | #endif |
| 7914 | |
| 7915 | bool success = false; |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7916 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7917 | if (ConditionPassed(opcode)) |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7918 | { |
| 7919 | uint32_t d; |
| 7920 | uint32_t m; |
| 7921 | uint32_t rotation; |
| 7922 | |
| 7923 | // EncodingSpecificOperations(); |
| 7924 | switch (encoding) |
| 7925 | { |
| 7926 | case eEncodingT1: |
| 7927 | // d = UInt(Rd); m = UInt(Rm); rotation = 0; |
| 7928 | d = Bits32 (opcode, 2, 0); |
| 7929 | m = Bits32 (opcode, 5, 3); |
| 7930 | rotation = 0; |
| 7931 | |
| 7932 | break; |
| 7933 | |
| 7934 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7935 | // d = UInt(Rd); m = UInt(Rm); rotation = UInt(rotate:'000'); |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7936 | d = Bits32 (opcode, 11, 8); |
| 7937 | m = Bits32 (opcode, 3, 0); |
| 7938 | rotation = Bits32 (opcode, 5, 4) << 3; |
| 7939 | |
| 7940 | // if BadReg(d) || BadReg(m) then UNPREDICTABLE; |
| 7941 | if (BadReg (d) || BadReg (m)) |
| 7942 | return false; |
| 7943 | |
| 7944 | break; |
| 7945 | |
| 7946 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7947 | // d = UInt(Rd); m = UInt(Rm); rotation = UInt(rotate:'000'); |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7948 | d = Bits32 (opcode, 15, 12); |
| 7949 | m = Bits32 (opcode, 3, 0); |
| 7950 | rotation = Bits32 (opcode, 11, 10) << 3; |
| 7951 | |
| 7952 | // if d == 15 || m == 15 then UNPREDICTABLE; |
| 7953 | if ((d == 15) || (m == 15)) |
| 7954 | return false; |
| 7955 | |
| 7956 | break; |
| 7957 | |
| 7958 | default: |
| 7959 | return false; |
| 7960 | } |
| 7961 | |
| 7962 | uint64_t Rm = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 7963 | if (!success) |
| 7964 | return false; |
| 7965 | |
| 7966 | // rotated = ROR(R[m], rotation); |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 7967 | uint64_t rotated = ROR (Rm, rotation, &success); |
| 7968 | if (!success) |
| 7969 | return false; |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7970 | |
| 7971 | // R[d] = ZeroExtend(rotated<7:0>, 32); |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 7972 | RegisterInfo source_reg; |
| 7973 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + m, source_reg); |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7974 | |
| 7975 | EmulateInstruction::Context context; |
| 7976 | context.type = eContextRegisterLoad; |
| 7977 | context.SetRegister (source_reg); |
| 7978 | |
| 7979 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + d, Bits32 (rotated, 7, 0))) |
| 7980 | return false; |
| 7981 | } |
| 7982 | return true; |
| 7983 | } |
| 7984 | |
Caroline Tice | 11555f2 | 2011-03-03 18:48:58 +0000 | [diff] [blame] | 7985 | // UXTH extracts a 16-bit value from a register, zero-extends it to 32 bits, and writes the result to the destination |
| 7986 | // register. You can specify a rotation by 0, 8, 16, or 24 bits before extracting the 16-bit value. |
| 7987 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7988 | EmulateInstructionARM::EmulateUXTH (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 11555f2 | 2011-03-03 18:48:58 +0000 | [diff] [blame] | 7989 | { |
| 7990 | #if 0 |
| 7991 | if ConditionPassed() then |
| 7992 | EncodingSpecificOperations(); |
| 7993 | rotated = ROR(R[m], rotation); |
| 7994 | R[d] = ZeroExtend(rotated<15:0>, 32); |
| 7995 | #endif |
| 7996 | |
| 7997 | bool success = false; |
Caroline Tice | 11555f2 | 2011-03-03 18:48:58 +0000 | [diff] [blame] | 7998 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7999 | if (ConditionPassed(opcode)) |
Caroline Tice | 11555f2 | 2011-03-03 18:48:58 +0000 | [diff] [blame] | 8000 | { |
| 8001 | uint32_t d; |
| 8002 | uint32_t m; |
| 8003 | uint32_t rotation; |
| 8004 | |
| 8005 | switch (encoding) |
| 8006 | { |
| 8007 | case eEncodingT1: |
| 8008 | // d = UInt(Rd); m = UInt(Rm); rotation = 0; |
| 8009 | d = Bits32 (opcode, 2, 0); |
| 8010 | m = Bits32 (opcode, 5, 3); |
| 8011 | rotation = 0; |
| 8012 | |
| 8013 | break; |
| 8014 | |
| 8015 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 8016 | // d = UInt(Rd); m = UInt(Rm); rotation = UInt(rotate:'000'); |
Caroline Tice | 11555f2 | 2011-03-03 18:48:58 +0000 | [diff] [blame] | 8017 | d = Bits32 (opcode, 11, 8); |
| 8018 | m = Bits32 (opcode, 3, 0); |
| 8019 | rotation = Bits32 (opcode, 5, 4) << 3; |
| 8020 | |
| 8021 | // if BadReg(d) || BadReg(m) then UNPREDICTABLE; |
| 8022 | if (BadReg (d) || BadReg (m)) |
| 8023 | return false; |
| 8024 | |
| 8025 | break; |
| 8026 | |
| 8027 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 8028 | // d = UInt(Rd); m = UInt(Rm); rotation = UInt(rotate:'000'); |
Caroline Tice | 11555f2 | 2011-03-03 18:48:58 +0000 | [diff] [blame] | 8029 | d = Bits32 (opcode, 15, 12); |
| 8030 | m = Bits32 (opcode, 3, 0); |
| 8031 | rotation = Bits32 (opcode, 11, 10) << 3; |
| 8032 | |
| 8033 | // if d == 15 || m == 15 then UNPREDICTABLE; |
| 8034 | if ((d == 15) || (m == 15)) |
| 8035 | return false; |
| 8036 | |
| 8037 | break; |
| 8038 | |
| 8039 | default: |
| 8040 | return false; |
| 8041 | } |
| 8042 | |
| 8043 | uint64_t Rm = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 8044 | if (!success) |
| 8045 | return false; |
| 8046 | |
| 8047 | // rotated = ROR(R[m], rotation); |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 8048 | uint64_t rotated = ROR (Rm, rotation, &success); |
| 8049 | if (!success) |
| 8050 | return false; |
Caroline Tice | 11555f2 | 2011-03-03 18:48:58 +0000 | [diff] [blame] | 8051 | |
| 8052 | // R[d] = ZeroExtend(rotated<15:0>, 32); |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 8053 | RegisterInfo source_reg; |
| 8054 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + m, source_reg); |
Caroline Tice | 11555f2 | 2011-03-03 18:48:58 +0000 | [diff] [blame] | 8055 | |
| 8056 | EmulateInstruction::Context context; |
| 8057 | context.type = eContextRegisterLoad; |
| 8058 | context.SetRegister (source_reg); |
| 8059 | |
| 8060 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + d, Bits32 (rotated, 15, 0))) |
| 8061 | return false; |
| 8062 | } |
| 8063 | return true; |
| 8064 | } |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 8065 | |
| 8066 | // RFE (Return From Exception) loads the PC and the CPSR from the word at the specified address and the following |
| 8067 | // word respectively. |
| 8068 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8069 | EmulateInstructionARM::EmulateRFE (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 8070 | { |
| 8071 | #if 0 |
| 8072 | if ConditionPassed() then |
| 8073 | EncodingSpecificOperations(); |
| 8074 | if !CurrentModeIsPrivileged() || CurrentInstrSet() == InstrSet_ThumbEE then |
| 8075 | UNPREDICTABLE; |
| 8076 | else |
| 8077 | address = if increment then R[n] else R[n]-8; |
| 8078 | if wordhigher then address = address+4; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 8079 | CPSRWriteByInstr(MemA[address+4,4], '1111', TRUE); |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 8080 | BranchWritePC(MemA[address,4]); |
| 8081 | if wback then R[n] = if increment then R[n]+8 else R[n]-8; |
| 8082 | #endif |
| 8083 | |
| 8084 | bool success = false; |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 8085 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8086 | if (ConditionPassed(opcode)) |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 8087 | { |
| 8088 | uint32_t n; |
| 8089 | bool wback; |
| 8090 | bool increment; |
| 8091 | bool wordhigher; |
| 8092 | |
| 8093 | // EncodingSpecificOperations(); |
| 8094 | switch (encoding) |
| 8095 | { |
| 8096 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 8097 | // n = UInt(Rn); wback = (W == '1'); increment = FALSE; wordhigher = FALSE; |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 8098 | n = Bits32 (opcode, 19, 16); |
| 8099 | wback = BitIsSet (opcode, 21); |
| 8100 | increment = false; |
| 8101 | wordhigher = false; |
| 8102 | |
| 8103 | // if n == 15 then UNPREDICTABLE; |
| 8104 | if (n == 15) |
| 8105 | return false; |
| 8106 | |
| 8107 | // if InITBlock() && !LastInITBlock() then UNPREDICTABLE; |
| 8108 | if (InITBlock() && !LastInITBlock()) |
| 8109 | return false; |
| 8110 | |
| 8111 | break; |
| 8112 | |
| 8113 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 8114 | // n = UInt(Rn); wback = (W == '1'); increment = TRUE; wordhigher = FALSE; |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 8115 | n = Bits32 (opcode, 19, 16); |
| 8116 | wback = BitIsSet (opcode, 21); |
| 8117 | increment = true; |
| 8118 | wordhigher = false; |
| 8119 | |
| 8120 | // if n == 15 then UNPREDICTABLE; |
| 8121 | if (n == 15) |
| 8122 | return false; |
| 8123 | |
| 8124 | // if InITBlock() && !LastInITBlock() then UNPREDICTABLE; |
| 8125 | if (InITBlock() && !LastInITBlock()) |
| 8126 | return false; |
| 8127 | |
| 8128 | break; |
| 8129 | |
| 8130 | case eEncodingA1: |
| 8131 | // n = UInt(Rn); |
| 8132 | n = Bits32 (opcode, 19, 16); |
| 8133 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 8134 | // wback = (W == '1'); inc = (U == '1'); wordhigher = (P == U); |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 8135 | wback = BitIsSet (opcode, 21); |
| 8136 | increment = BitIsSet (opcode, 23); |
| 8137 | wordhigher = (Bit32 (opcode, 24) == Bit32 (opcode, 23)); |
| 8138 | |
| 8139 | // if n == 15 then UNPREDICTABLE; |
| 8140 | if (n == 15) |
| 8141 | return false; |
| 8142 | |
| 8143 | break; |
| 8144 | |
| 8145 | default: |
| 8146 | return false; |
| 8147 | } |
| 8148 | |
| 8149 | // if !CurrentModeIsPrivileged() || CurrentInstrSet() == InstrSet_ThumbEE then |
| 8150 | if (!CurrentModeIsPrivileged ()) |
| 8151 | // UNPREDICTABLE; |
| 8152 | return false; |
| 8153 | else |
| 8154 | { |
| 8155 | uint64_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 8156 | if (!success) |
| 8157 | return false; |
| 8158 | |
| 8159 | addr_t address; |
| 8160 | // address = if increment then R[n] else R[n]-8; |
| 8161 | if (increment) |
| 8162 | address = Rn; |
| 8163 | else |
| 8164 | address = Rn - 8; |
| 8165 | |
| 8166 | // if wordhigher then address = address+4; |
| 8167 | if (wordhigher) |
| 8168 | address = address + 4; |
| 8169 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 8170 | // CPSRWriteByInstr(MemA[address+4,4], '1111', TRUE); |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 8171 | RegisterInfo base_reg; |
| 8172 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 8173 | |
| 8174 | EmulateInstruction::Context context; |
| 8175 | context.type = eContextReturnFromException; |
| 8176 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 8177 | |
| 8178 | uint64_t data = MemARead (context, address + 4, 4, 0, &success); |
| 8179 | if (!success) |
| 8180 | return false; |
| 8181 | |
| 8182 | CPSRWriteByInstr (data, 15, true); |
| 8183 | |
| 8184 | // BranchWritePC(MemA[address,4]); |
| 8185 | uint64_t data2 = MemARead (context, address, 4, 0, &success); |
| 8186 | if (!success) |
| 8187 | return false; |
| 8188 | |
| 8189 | BranchWritePC (context, data2); |
| 8190 | |
| 8191 | // if wback then R[n] = if increment then R[n]+8 else R[n]-8; |
| 8192 | if (wback) |
| 8193 | { |
| 8194 | context.type = eContextAdjustBaseRegister; |
| 8195 | if (increment) |
| 8196 | { |
| 8197 | context.SetOffset (8); |
| 8198 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, Rn + 8)) |
| 8199 | return false; |
| 8200 | } |
| 8201 | else |
| 8202 | { |
| 8203 | context.SetOffset (-8); |
| 8204 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, Rn - 8)) |
| 8205 | return false; |
| 8206 | } |
| 8207 | } // if wback |
| 8208 | } |
| 8209 | } // if ConditionPassed() |
| 8210 | return true; |
| 8211 | } |
Caroline Tice | 11555f2 | 2011-03-03 18:48:58 +0000 | [diff] [blame] | 8212 | |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8213 | // Bitwise Exclusive OR (immediate) performs a bitwise exclusive OR of a register value and an immediate value, |
| 8214 | // and writes the result to the destination register. It can optionally update the condition flags based on |
| 8215 | // the result. |
| 8216 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8217 | EmulateInstructionARM::EmulateEORImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8218 | { |
| 8219 | #if 0 |
| 8220 | // ARM pseudo code... |
| 8221 | if ConditionPassed() then |
| 8222 | EncodingSpecificOperations(); |
| 8223 | result = R[n] EOR imm32; |
| 8224 | if d == 15 then // Can only occur for ARM encoding |
| 8225 | ALUWritePC(result); // setflags is always FALSE here |
| 8226 | else |
| 8227 | R[d] = result; |
| 8228 | if setflags then |
| 8229 | APSR.N = result<31>; |
| 8230 | APSR.Z = IsZeroBit(result); |
| 8231 | APSR.C = carry; |
| 8232 | // APSR.V unchanged |
| 8233 | #endif |
| 8234 | |
| 8235 | bool success = false; |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8236 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8237 | if (ConditionPassed(opcode)) |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8238 | { |
| 8239 | uint32_t Rd, Rn; |
| 8240 | uint32_t imm32; // the immediate value to be ORed to the value obtained from Rn |
| 8241 | bool setflags; |
| 8242 | uint32_t carry; // the carry bit after ARM/Thumb Expand operation |
| 8243 | switch (encoding) |
| 8244 | { |
| 8245 | case eEncodingT1: |
| 8246 | Rd = Bits32(opcode, 11, 8); |
| 8247 | Rn = Bits32(opcode, 19, 16); |
| 8248 | setflags = BitIsSet(opcode, 20); |
| 8249 | imm32 = ThumbExpandImm_C(opcode, APSR_C, carry); // (imm32, carry) = ThumbExpandImm(i:imm3:imm8, APSR.C) |
| 8250 | // if Rd == '1111' && S == '1' then SEE TEQ (immediate); |
| 8251 | if (Rd == 15 && setflags) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8252 | return EmulateTEQImm (opcode, eEncodingT1); |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8253 | if (Rd == 13 || (Rd == 15 && !setflags) || BadReg(Rn)) |
| 8254 | return false; |
| 8255 | break; |
| 8256 | case eEncodingA1: |
| 8257 | Rd = Bits32(opcode, 15, 12); |
| 8258 | Rn = Bits32(opcode, 19, 16); |
| 8259 | setflags = BitIsSet(opcode, 20); |
| 8260 | imm32 = ARMExpandImm_C(opcode, APSR_C, carry); // (imm32, carry) = ARMExpandImm(imm12, APSR.C) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8261 | |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8262 | // if Rd == '1111' && S == '1' then SEE SUBS PC, LR and related instructions; |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8263 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8264 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8265 | break; |
| 8266 | default: |
| 8267 | return false; |
| 8268 | } |
| 8269 | |
| 8270 | // Read the first operand. |
| 8271 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 8272 | if (!success) |
| 8273 | return false; |
| 8274 | |
| 8275 | uint32_t result = val1 ^ imm32; |
| 8276 | |
| 8277 | EmulateInstruction::Context context; |
| 8278 | context.type = EmulateInstruction::eContextImmediate; |
| 8279 | context.SetNoArgs (); |
| 8280 | |
| 8281 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
| 8282 | return false; |
| 8283 | } |
| 8284 | return true; |
| 8285 | } |
| 8286 | |
| 8287 | // Bitwise Exclusive OR (register) performs a bitwise exclusive OR of a register value and an |
| 8288 | // optionally-shifted register value, and writes the result to the destination register. |
| 8289 | // It can optionally update the condition flags based on the result. |
| 8290 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8291 | EmulateInstructionARM::EmulateEORReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8292 | { |
| 8293 | #if 0 |
| 8294 | // ARM pseudo code... |
| 8295 | if ConditionPassed() then |
| 8296 | EncodingSpecificOperations(); |
| 8297 | (shifted, carry) = Shift_C(R[m], shift_t, shift_n, APSR.C); |
| 8298 | result = R[n] EOR shifted; |
| 8299 | if d == 15 then // Can only occur for ARM encoding |
| 8300 | ALUWritePC(result); // setflags is always FALSE here |
| 8301 | else |
| 8302 | R[d] = result; |
| 8303 | if setflags then |
| 8304 | APSR.N = result<31>; |
| 8305 | APSR.Z = IsZeroBit(result); |
| 8306 | APSR.C = carry; |
| 8307 | // APSR.V unchanged |
| 8308 | #endif |
| 8309 | |
| 8310 | bool success = false; |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8311 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8312 | if (ConditionPassed(opcode)) |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8313 | { |
| 8314 | uint32_t Rd, Rn, Rm; |
| 8315 | ARM_ShifterType shift_t; |
| 8316 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 8317 | bool setflags; |
| 8318 | uint32_t carry; |
| 8319 | switch (encoding) |
| 8320 | { |
| 8321 | case eEncodingT1: |
| 8322 | Rd = Rn = Bits32(opcode, 2, 0); |
| 8323 | Rm = Bits32(opcode, 5, 3); |
| 8324 | setflags = !InITBlock(); |
| 8325 | shift_t = SRType_LSL; |
| 8326 | shift_n = 0; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8327 | break; |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8328 | case eEncodingT2: |
| 8329 | Rd = Bits32(opcode, 11, 8); |
| 8330 | Rn = Bits32(opcode, 19, 16); |
| 8331 | Rm = Bits32(opcode, 3, 0); |
| 8332 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 8333 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
| 8334 | // if Rd == '1111' && S == '1' then SEE TEQ (register); |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8335 | if (Rd == 15 && setflags) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8336 | return EmulateTEQReg (opcode, eEncodingT1); |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8337 | if (Rd == 13 || (Rd == 15 && !setflags) || BadReg(Rn) || BadReg(Rm)) |
| 8338 | return false; |
| 8339 | break; |
| 8340 | case eEncodingA1: |
| 8341 | Rd = Bits32(opcode, 15, 12); |
| 8342 | Rn = Bits32(opcode, 19, 16); |
| 8343 | Rm = Bits32(opcode, 3, 0); |
| 8344 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 8345 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8346 | |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8347 | // if Rd == '1111' && S == '1' then SEE SUBS PC, LR and related instructions; |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8348 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8349 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8350 | break; |
| 8351 | default: |
| 8352 | return false; |
| 8353 | } |
| 8354 | |
| 8355 | // Read the first operand. |
| 8356 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 8357 | if (!success) |
| 8358 | return false; |
| 8359 | |
| 8360 | // Read the second operand. |
| 8361 | uint32_t val2 = ReadCoreReg(Rm, &success); |
| 8362 | if (!success) |
| 8363 | return false; |
| 8364 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 8365 | uint32_t shifted = Shift_C(val2, shift_t, shift_n, APSR_C, carry, &success); |
| 8366 | if (!success) |
| 8367 | return false; |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8368 | uint32_t result = val1 ^ shifted; |
| 8369 | |
| 8370 | EmulateInstruction::Context context; |
| 8371 | context.type = EmulateInstruction::eContextImmediate; |
| 8372 | context.SetNoArgs (); |
| 8373 | |
| 8374 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
| 8375 | return false; |
| 8376 | } |
| 8377 | return true; |
| 8378 | } |
| 8379 | |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8380 | // Bitwise OR (immediate) performs a bitwise (inclusive) OR of a register value and an immediate value, and |
| 8381 | // writes the result to the destination register. It can optionally update the condition flags based |
| 8382 | // on the result. |
| 8383 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8384 | EmulateInstructionARM::EmulateORRImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8385 | { |
| 8386 | #if 0 |
| 8387 | // ARM pseudo code... |
| 8388 | if ConditionPassed() then |
| 8389 | EncodingSpecificOperations(); |
| 8390 | result = R[n] OR imm32; |
| 8391 | if d == 15 then // Can only occur for ARM encoding |
| 8392 | ALUWritePC(result); // setflags is always FALSE here |
| 8393 | else |
| 8394 | R[d] = result; |
| 8395 | if setflags then |
| 8396 | APSR.N = result<31>; |
| 8397 | APSR.Z = IsZeroBit(result); |
| 8398 | APSR.C = carry; |
| 8399 | // APSR.V unchanged |
| 8400 | #endif |
| 8401 | |
| 8402 | bool success = false; |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8403 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8404 | if (ConditionPassed(opcode)) |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8405 | { |
| 8406 | uint32_t Rd, Rn; |
| 8407 | uint32_t imm32; // the immediate value to be ORed to the value obtained from Rn |
| 8408 | bool setflags; |
| 8409 | uint32_t carry; // the carry bit after ARM/Thumb Expand operation |
| 8410 | switch (encoding) |
| 8411 | { |
| 8412 | case eEncodingT1: |
| 8413 | Rd = Bits32(opcode, 11, 8); |
| 8414 | Rn = Bits32(opcode, 19, 16); |
| 8415 | setflags = BitIsSet(opcode, 20); |
| 8416 | imm32 = ThumbExpandImm_C(opcode, APSR_C, carry); // (imm32, carry) = ThumbExpandImm(i:imm3:imm8, APSR.C) |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 8417 | // if Rn == '1111' then SEE MOV (immediate); |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8418 | if (Rn == 15) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8419 | return EmulateMOVRdImm (opcode, eEncodingT2); |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8420 | if (BadReg(Rd) || Rn == 13) |
| 8421 | return false; |
| 8422 | break; |
| 8423 | case eEncodingA1: |
| 8424 | Rd = Bits32(opcode, 15, 12); |
| 8425 | Rn = Bits32(opcode, 19, 16); |
| 8426 | setflags = BitIsSet(opcode, 20); |
| 8427 | imm32 = ARMExpandImm_C(opcode, APSR_C, carry); // (imm32, carry) = ARMExpandImm(imm12, APSR.C) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8428 | |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8429 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8430 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8431 | break; |
| 8432 | default: |
| 8433 | return false; |
| 8434 | } |
| 8435 | |
| 8436 | // Read the first operand. |
| 8437 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 8438 | if (!success) |
| 8439 | return false; |
| 8440 | |
| 8441 | uint32_t result = val1 | imm32; |
| 8442 | |
| 8443 | EmulateInstruction::Context context; |
| 8444 | context.type = EmulateInstruction::eContextImmediate; |
| 8445 | context.SetNoArgs (); |
| 8446 | |
| 8447 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
| 8448 | return false; |
| 8449 | } |
| 8450 | return true; |
| 8451 | } |
| 8452 | |
| 8453 | // Bitwise OR (register) performs a bitwise (inclusive) OR of a register value and an optionally-shifted register |
| 8454 | // value, and writes the result to the destination register. It can optionally update the condition flags based |
| 8455 | // on the result. |
| 8456 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8457 | EmulateInstructionARM::EmulateORRReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8458 | { |
| 8459 | #if 0 |
| 8460 | // ARM pseudo code... |
| 8461 | if ConditionPassed() then |
| 8462 | EncodingSpecificOperations(); |
| 8463 | (shifted, carry) = Shift_C(R[m], shift_t, shift_n, APSR.C); |
| 8464 | result = R[n] OR shifted; |
| 8465 | if d == 15 then // Can only occur for ARM encoding |
| 8466 | ALUWritePC(result); // setflags is always FALSE here |
| 8467 | else |
| 8468 | R[d] = result; |
| 8469 | if setflags then |
| 8470 | APSR.N = result<31>; |
| 8471 | APSR.Z = IsZeroBit(result); |
| 8472 | APSR.C = carry; |
| 8473 | // APSR.V unchanged |
| 8474 | #endif |
| 8475 | |
| 8476 | bool success = false; |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8477 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8478 | if (ConditionPassed(opcode)) |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8479 | { |
| 8480 | uint32_t Rd, Rn, Rm; |
| 8481 | ARM_ShifterType shift_t; |
| 8482 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 8483 | bool setflags; |
| 8484 | uint32_t carry; |
| 8485 | switch (encoding) |
| 8486 | { |
| 8487 | case eEncodingT1: |
| 8488 | Rd = Rn = Bits32(opcode, 2, 0); |
| 8489 | Rm = Bits32(opcode, 5, 3); |
| 8490 | setflags = !InITBlock(); |
| 8491 | shift_t = SRType_LSL; |
| 8492 | shift_n = 0; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8493 | break; |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8494 | case eEncodingT2: |
| 8495 | Rd = Bits32(opcode, 11, 8); |
| 8496 | Rn = Bits32(opcode, 19, 16); |
| 8497 | Rm = Bits32(opcode, 3, 0); |
| 8498 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 8499 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
| 8500 | // if Rn == '1111' then SEE MOV (register); |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8501 | if (Rn == 15) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8502 | return EmulateMOVRdRm (opcode, eEncodingT3); |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8503 | if (BadReg(Rd) || Rn == 13 || BadReg(Rm)) |
| 8504 | return false; |
| 8505 | break; |
| 8506 | case eEncodingA1: |
| 8507 | Rd = Bits32(opcode, 15, 12); |
| 8508 | Rn = Bits32(opcode, 19, 16); |
| 8509 | Rm = Bits32(opcode, 3, 0); |
| 8510 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 8511 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8512 | |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8513 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8514 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8515 | break; |
| 8516 | default: |
| 8517 | return false; |
| 8518 | } |
| 8519 | |
| 8520 | // Read the first operand. |
| 8521 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 8522 | if (!success) |
| 8523 | return false; |
| 8524 | |
| 8525 | // Read the second operand. |
| 8526 | uint32_t val2 = ReadCoreReg(Rm, &success); |
| 8527 | if (!success) |
| 8528 | return false; |
| 8529 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 8530 | uint32_t shifted = Shift_C(val2, shift_t, shift_n, APSR_C, carry, &success); |
| 8531 | if (!success) |
| 8532 | return false; |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8533 | uint32_t result = val1 | shifted; |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8534 | |
| 8535 | EmulateInstruction::Context context; |
| 8536 | context.type = EmulateInstruction::eContextImmediate; |
| 8537 | context.SetNoArgs (); |
| 8538 | |
| 8539 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
| 8540 | return false; |
| 8541 | } |
| 8542 | return true; |
| 8543 | } |
| 8544 | |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8545 | // Reverse Subtract (immediate) subtracts a register value from an immediate value, and writes the result to |
| 8546 | // the destination register. It can optionally update the condition flags based on the result. |
| 8547 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8548 | EmulateInstructionARM::EmulateRSBImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8549 | { |
| 8550 | #if 0 |
| 8551 | // ARM pseudo code... |
| 8552 | if ConditionPassed() then |
| 8553 | EncodingSpecificOperations(); |
| 8554 | (result, carry, overflow) = AddWithCarry(NOT(R[n]), imm32, '1'); |
| 8555 | if d == 15 then // Can only occur for ARM encoding |
| 8556 | ALUWritePC(result); // setflags is always FALSE here |
| 8557 | else |
| 8558 | R[d] = result; |
| 8559 | if setflags then |
| 8560 | APSR.N = result<31>; |
| 8561 | APSR.Z = IsZeroBit(result); |
| 8562 | APSR.C = carry; |
| 8563 | APSR.V = overflow; |
| 8564 | #endif |
| 8565 | |
| 8566 | bool success = false; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8567 | |
| 8568 | uint32_t Rd; // the destination register |
| 8569 | uint32_t Rn; // the first operand |
| 8570 | bool setflags; |
| 8571 | uint32_t imm32; // the immediate value to be added to the value obtained from Rn |
| 8572 | switch (encoding) { |
| 8573 | case eEncodingT1: |
| 8574 | Rd = Bits32(opcode, 2, 0); |
| 8575 | Rn = Bits32(opcode, 5, 3); |
| 8576 | setflags = !InITBlock(); |
| 8577 | imm32 = 0; |
| 8578 | break; |
| 8579 | case eEncodingT2: |
| 8580 | Rd = Bits32(opcode, 11, 8); |
| 8581 | Rn = Bits32(opcode, 19, 16); |
| 8582 | setflags = BitIsSet(opcode, 20); |
| 8583 | imm32 = ThumbExpandImm(opcode); // imm32 = ThumbExpandImm(i:imm3:imm8) |
| 8584 | if (BadReg(Rd) || BadReg(Rn)) |
| 8585 | return false; |
| 8586 | break; |
| 8587 | case eEncodingA1: |
| 8588 | Rd = Bits32(opcode, 15, 12); |
| 8589 | Rn = Bits32(opcode, 19, 16); |
| 8590 | setflags = BitIsSet(opcode, 20); |
| 8591 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8592 | |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8593 | // if Rd == '1111' && S == '1' then SEE SUBS PC, LR and related instructions; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8594 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8595 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8596 | break; |
| 8597 | default: |
| 8598 | return false; |
| 8599 | } |
| 8600 | // Read the register value from the operand register Rn. |
| 8601 | uint32_t reg_val = ReadCoreReg(Rn, &success); |
| 8602 | if (!success) |
| 8603 | return false; |
| 8604 | |
| 8605 | AddWithCarryResult res = AddWithCarry(~reg_val, imm32, 1); |
| 8606 | |
| 8607 | EmulateInstruction::Context context; |
| 8608 | context.type = EmulateInstruction::eContextImmediate; |
| 8609 | context.SetNoArgs (); |
| 8610 | |
| 8611 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 8612 | return false; |
| 8613 | |
| 8614 | return true; |
| 8615 | } |
| 8616 | |
| 8617 | // Reverse Subtract (register) subtracts a register value from an optionally-shifted register value, and writes the |
| 8618 | // result to the destination register. It can optionally update the condition flags based on the result. |
| 8619 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8620 | EmulateInstructionARM::EmulateRSBReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8621 | { |
| 8622 | #if 0 |
| 8623 | // ARM pseudo code... |
| 8624 | if ConditionPassed() then |
| 8625 | EncodingSpecificOperations(); |
| 8626 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 8627 | (result, carry, overflow) = AddWithCarry(NOT(R[n]), shifted, '1'); |
| 8628 | if d == 15 then // Can only occur for ARM encoding |
| 8629 | ALUWritePC(result); // setflags is always FALSE here |
| 8630 | else |
| 8631 | R[d] = result; |
| 8632 | if setflags then |
| 8633 | APSR.N = result<31>; |
| 8634 | APSR.Z = IsZeroBit(result); |
| 8635 | APSR.C = carry; |
| 8636 | APSR.V = overflow; |
| 8637 | #endif |
| 8638 | |
| 8639 | bool success = false; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8640 | |
| 8641 | uint32_t Rd; // the destination register |
| 8642 | uint32_t Rn; // the first operand |
| 8643 | uint32_t Rm; // the second operand |
| 8644 | bool setflags; |
| 8645 | ARM_ShifterType shift_t; |
| 8646 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 8647 | switch (encoding) { |
| 8648 | case eEncodingT1: |
| 8649 | Rd = Bits32(opcode, 11, 8); |
| 8650 | Rn = Bits32(opcode, 19, 16); |
| 8651 | Rm = Bits32(opcode, 3, 0); |
| 8652 | setflags = BitIsSet(opcode, 20); |
| 8653 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
| 8654 | // if (BadReg(d) || BadReg(m)) then UNPREDICTABLE; |
| 8655 | if (BadReg(Rd) || BadReg(Rn) || BadReg(Rm)) |
| 8656 | return false; |
| 8657 | break; |
| 8658 | case eEncodingA1: |
| 8659 | Rd = Bits32(opcode, 15, 12); |
| 8660 | Rn = Bits32(opcode, 19, 16); |
| 8661 | Rm = Bits32(opcode, 3, 0); |
| 8662 | setflags = BitIsSet(opcode, 20); |
| 8663 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8664 | |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8665 | // if Rd == '1111' && S == '1' then SEE SUBS PC, LR and related instructions; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8666 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8667 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8668 | break; |
| 8669 | default: |
| 8670 | return false; |
| 8671 | } |
| 8672 | // Read the register value from register Rn. |
| 8673 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 8674 | if (!success) |
| 8675 | return false; |
| 8676 | |
| 8677 | // Read the register value from register Rm. |
| 8678 | uint32_t val2 = ReadCoreReg(Rm, &success); |
| 8679 | if (!success) |
| 8680 | return false; |
| 8681 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 8682 | uint32_t shifted = Shift(val2, shift_t, shift_n, APSR_C, &success); |
| 8683 | if (!success) |
| 8684 | return false; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8685 | AddWithCarryResult res = AddWithCarry(~val1, shifted, 1); |
| 8686 | |
| 8687 | EmulateInstruction::Context context; |
| 8688 | context.type = EmulateInstruction::eContextImmediate; |
| 8689 | context.SetNoArgs(); |
| 8690 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 8691 | return false; |
| 8692 | |
| 8693 | return true; |
| 8694 | } |
| 8695 | |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8696 | // Reverse Subtract with Carry (immediate) subtracts a register value and the value of NOT (Carry flag) from |
| 8697 | // an immediate value, and writes the result to the destination register. It can optionally update the condition |
| 8698 | // flags based on the result. |
| 8699 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8700 | EmulateInstructionARM::EmulateRSCImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8701 | { |
| 8702 | #if 0 |
| 8703 | // ARM pseudo code... |
| 8704 | if ConditionPassed() then |
| 8705 | EncodingSpecificOperations(); |
| 8706 | (result, carry, overflow) = AddWithCarry(NOT(R[n]), imm32, APSR.C); |
| 8707 | if d == 15 then |
| 8708 | ALUWritePC(result); // setflags is always FALSE here |
| 8709 | else |
| 8710 | R[d] = result; |
| 8711 | if setflags then |
| 8712 | APSR.N = result<31>; |
| 8713 | APSR.Z = IsZeroBit(result); |
| 8714 | APSR.C = carry; |
| 8715 | APSR.V = overflow; |
| 8716 | #endif |
| 8717 | |
| 8718 | bool success = false; |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8719 | |
| 8720 | uint32_t Rd; // the destination register |
| 8721 | uint32_t Rn; // the first operand |
| 8722 | bool setflags; |
| 8723 | uint32_t imm32; // the immediate value to be added to the value obtained from Rn |
| 8724 | switch (encoding) { |
| 8725 | case eEncodingA1: |
| 8726 | Rd = Bits32(opcode, 15, 12); |
| 8727 | Rn = Bits32(opcode, 19, 16); |
| 8728 | setflags = BitIsSet(opcode, 20); |
| 8729 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8730 | |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8731 | // if Rd == '1111' && S == '1' then SEE SUBS PC, LR and related instructions; |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8732 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8733 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8734 | break; |
| 8735 | default: |
| 8736 | return false; |
| 8737 | } |
| 8738 | // Read the register value from the operand register Rn. |
| 8739 | uint32_t reg_val = ReadCoreReg(Rn, &success); |
| 8740 | if (!success) |
| 8741 | return false; |
| 8742 | |
| 8743 | AddWithCarryResult res = AddWithCarry(~reg_val, imm32, APSR_C); |
| 8744 | |
| 8745 | EmulateInstruction::Context context; |
| 8746 | context.type = EmulateInstruction::eContextImmediate; |
| 8747 | context.SetNoArgs (); |
| 8748 | |
| 8749 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 8750 | return false; |
| 8751 | |
| 8752 | return true; |
| 8753 | } |
| 8754 | |
| 8755 | // Reverse Subtract with Carry (register) subtracts a register value and the value of NOT (Carry flag) from an |
| 8756 | // optionally-shifted register value, and writes the result to the destination register. It can optionally update the |
| 8757 | // condition flags based on the result. |
| 8758 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8759 | EmulateInstructionARM::EmulateRSCReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8760 | { |
| 8761 | #if 0 |
| 8762 | // ARM pseudo code... |
| 8763 | if ConditionPassed() then |
| 8764 | EncodingSpecificOperations(); |
| 8765 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 8766 | (result, carry, overflow) = AddWithCarry(NOT(R[n]), shifted, APSR.C); |
| 8767 | if d == 15 then |
| 8768 | ALUWritePC(result); // setflags is always FALSE here |
| 8769 | else |
| 8770 | R[d] = result; |
| 8771 | if setflags then |
| 8772 | APSR.N = result<31>; |
| 8773 | APSR.Z = IsZeroBit(result); |
| 8774 | APSR.C = carry; |
| 8775 | APSR.V = overflow; |
| 8776 | #endif |
| 8777 | |
| 8778 | bool success = false; |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8779 | |
| 8780 | uint32_t Rd; // the destination register |
| 8781 | uint32_t Rn; // the first operand |
| 8782 | uint32_t Rm; // the second operand |
| 8783 | bool setflags; |
| 8784 | ARM_ShifterType shift_t; |
| 8785 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 8786 | switch (encoding) { |
| 8787 | case eEncodingA1: |
| 8788 | Rd = Bits32(opcode, 15, 12); |
| 8789 | Rn = Bits32(opcode, 19, 16); |
| 8790 | Rm = Bits32(opcode, 3, 0); |
| 8791 | setflags = BitIsSet(opcode, 20); |
| 8792 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8793 | |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8794 | // if Rd == '1111' && S == '1' then SEE SUBS PC, LR and related instructions; |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8795 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8796 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8797 | break; |
| 8798 | default: |
| 8799 | return false; |
| 8800 | } |
| 8801 | // Read the register value from register Rn. |
| 8802 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 8803 | if (!success) |
| 8804 | return false; |
| 8805 | |
| 8806 | // Read the register value from register Rm. |
| 8807 | uint32_t val2 = ReadCoreReg(Rm, &success); |
| 8808 | if (!success) |
| 8809 | return false; |
| 8810 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 8811 | uint32_t shifted = Shift(val2, shift_t, shift_n, APSR_C, &success); |
| 8812 | if (!success) |
| 8813 | return false; |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8814 | AddWithCarryResult res = AddWithCarry(~val1, shifted, APSR_C); |
| 8815 | |
| 8816 | EmulateInstruction::Context context; |
| 8817 | context.type = EmulateInstruction::eContextImmediate; |
| 8818 | context.SetNoArgs(); |
| 8819 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 8820 | return false; |
| 8821 | |
| 8822 | return true; |
| 8823 | } |
| 8824 | |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8825 | // Subtract with Carry (immediate) subtracts an immediate value and the value of |
| 8826 | // NOT (Carry flag) from a register value, and writes the result to the destination register. |
| 8827 | // It can optionally update the condition flags based on the result. |
| 8828 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8829 | EmulateInstructionARM::EmulateSBCImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8830 | { |
| 8831 | #if 0 |
| 8832 | // ARM pseudo code... |
| 8833 | if ConditionPassed() then |
| 8834 | EncodingSpecificOperations(); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8835 | (result, carry, overflow) = AddWithCarry(R[n], NOT(imm32), APSR.C); |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8836 | if d == 15 then // Can only occur for ARM encoding |
| 8837 | ALUWritePC(result); // setflags is always FALSE here |
| 8838 | else |
| 8839 | R[d] = result; |
| 8840 | if setflags then |
| 8841 | APSR.N = result<31>; |
| 8842 | APSR.Z = IsZeroBit(result); |
| 8843 | APSR.C = carry; |
| 8844 | APSR.V = overflow; |
| 8845 | #endif |
| 8846 | |
| 8847 | bool success = false; |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8848 | |
| 8849 | uint32_t Rd; // the destination register |
| 8850 | uint32_t Rn; // the first operand |
| 8851 | bool setflags; |
| 8852 | uint32_t imm32; // the immediate value to be added to the value obtained from Rn |
| 8853 | switch (encoding) { |
| 8854 | case eEncodingT1: |
| 8855 | Rd = Bits32(opcode, 11, 8); |
| 8856 | Rn = Bits32(opcode, 19, 16); |
| 8857 | setflags = BitIsSet(opcode, 20); |
| 8858 | imm32 = ThumbExpandImm(opcode); // imm32 = ThumbExpandImm(i:imm3:imm8) |
| 8859 | if (BadReg(Rd) || BadReg(Rn)) |
| 8860 | return false; |
| 8861 | break; |
| 8862 | case eEncodingA1: |
| 8863 | Rd = Bits32(opcode, 15, 12); |
| 8864 | Rn = Bits32(opcode, 19, 16); |
| 8865 | setflags = BitIsSet(opcode, 20); |
| 8866 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8867 | |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8868 | // if Rd == '1111' && S == '1' then SEE SUBS PC, LR and related instructions; |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8869 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8870 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8871 | break; |
| 8872 | default: |
| 8873 | return false; |
| 8874 | } |
| 8875 | // Read the register value from the operand register Rn. |
| 8876 | uint32_t reg_val = ReadCoreReg(Rn, &success); |
| 8877 | if (!success) |
| 8878 | return false; |
| 8879 | |
| 8880 | AddWithCarryResult res = AddWithCarry(reg_val, ~imm32, APSR_C); |
| 8881 | |
| 8882 | EmulateInstruction::Context context; |
| 8883 | context.type = EmulateInstruction::eContextImmediate; |
| 8884 | context.SetNoArgs (); |
| 8885 | |
| 8886 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 8887 | return false; |
| 8888 | |
| 8889 | return true; |
| 8890 | } |
| 8891 | |
| 8892 | // Subtract with Carry (register) subtracts an optionally-shifted register value and the value of |
| 8893 | // NOT (Carry flag) from a register value, and writes the result to the destination register. |
| 8894 | // It can optionally update the condition flags based on the result. |
| 8895 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8896 | EmulateInstructionARM::EmulateSBCReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8897 | { |
| 8898 | #if 0 |
| 8899 | // ARM pseudo code... |
| 8900 | if ConditionPassed() then |
| 8901 | EncodingSpecificOperations(); |
| 8902 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 8903 | (result, carry, overflow) = AddWithCarry(R[n], NOT(shifted), APSR.C); |
| 8904 | if d == 15 then // Can only occur for ARM encoding |
| 8905 | ALUWritePC(result); // setflags is always FALSE here |
| 8906 | else |
| 8907 | R[d] = result; |
| 8908 | if setflags then |
| 8909 | APSR.N = result<31>; |
| 8910 | APSR.Z = IsZeroBit(result); |
| 8911 | APSR.C = carry; |
| 8912 | APSR.V = overflow; |
| 8913 | #endif |
| 8914 | |
| 8915 | bool success = false; |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8916 | |
| 8917 | uint32_t Rd; // the destination register |
| 8918 | uint32_t Rn; // the first operand |
| 8919 | uint32_t Rm; // the second operand |
| 8920 | bool setflags; |
| 8921 | ARM_ShifterType shift_t; |
| 8922 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 8923 | switch (encoding) { |
| 8924 | case eEncodingT1: |
| 8925 | Rd = Rn = Bits32(opcode, 2, 0); |
| 8926 | Rm = Bits32(opcode, 5, 3); |
| 8927 | setflags = !InITBlock(); |
| 8928 | shift_t = SRType_LSL; |
| 8929 | shift_n = 0; |
| 8930 | break; |
| 8931 | case eEncodingT2: |
| 8932 | Rd = Bits32(opcode, 11, 8); |
| 8933 | Rn = Bits32(opcode, 19, 16); |
| 8934 | Rm = Bits32(opcode, 3, 0); |
| 8935 | setflags = BitIsSet(opcode, 20); |
| 8936 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
| 8937 | if (BadReg(Rd) || BadReg(Rn) || BadReg(Rm)) |
| 8938 | return false; |
| 8939 | break; |
| 8940 | case eEncodingA1: |
| 8941 | Rd = Bits32(opcode, 15, 12); |
| 8942 | Rn = Bits32(opcode, 19, 16); |
| 8943 | Rm = Bits32(opcode, 3, 0); |
| 8944 | setflags = BitIsSet(opcode, 20); |
| 8945 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8946 | |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8947 | // if Rd == '1111' && S == '1' then SEE SUBS PC, LR and related instructions; |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8948 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8949 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8950 | break; |
| 8951 | default: |
| 8952 | return false; |
| 8953 | } |
| 8954 | // Read the register value from register Rn. |
| 8955 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 8956 | if (!success) |
| 8957 | return false; |
| 8958 | |
| 8959 | // Read the register value from register Rm. |
| 8960 | uint32_t val2 = ReadCoreReg(Rm, &success); |
| 8961 | if (!success) |
| 8962 | return false; |
| 8963 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 8964 | uint32_t shifted = Shift(val2, shift_t, shift_n, APSR_C, &success); |
| 8965 | if (!success) |
| 8966 | return false; |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8967 | AddWithCarryResult res = AddWithCarry(val1, ~shifted, APSR_C); |
| 8968 | |
| 8969 | EmulateInstruction::Context context; |
| 8970 | context.type = EmulateInstruction::eContextImmediate; |
| 8971 | context.SetNoArgs(); |
| 8972 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 8973 | return false; |
| 8974 | |
| 8975 | return true; |
| 8976 | } |
| 8977 | |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8978 | // This instruction subtracts an immediate value from a register value, and writes the result |
| 8979 | // to the destination register. It can optionally update the condition flags based on the result. |
| 8980 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8981 | EmulateInstructionARM::EmulateSUBImmThumb (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8982 | { |
| 8983 | #if 0 |
| 8984 | // ARM pseudo code... |
| 8985 | if ConditionPassed() then |
| 8986 | EncodingSpecificOperations(); |
| 8987 | (result, carry, overflow) = AddWithCarry(R[n], NOT(imm32), '1'); |
| 8988 | R[d] = result; |
| 8989 | if setflags then |
| 8990 | APSR.N = result<31>; |
| 8991 | APSR.Z = IsZeroBit(result); |
| 8992 | APSR.C = carry; |
| 8993 | APSR.V = overflow; |
| 8994 | #endif |
| 8995 | |
| 8996 | bool success = false; |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8997 | |
| 8998 | uint32_t Rd; // the destination register |
| 8999 | uint32_t Rn; // the first operand |
| 9000 | bool setflags; |
| 9001 | uint32_t imm32; // the immediate value to be subtracted from the value obtained from Rn |
| 9002 | switch (encoding) { |
| 9003 | case eEncodingT1: |
| 9004 | Rd = Bits32(opcode, 2, 0); |
| 9005 | Rn = Bits32(opcode, 5, 3); |
| 9006 | setflags = !InITBlock(); |
| 9007 | imm32 = Bits32(opcode, 8, 6); // imm32 = ZeroExtend(imm3, 32) |
| 9008 | break; |
| 9009 | case eEncodingT2: |
| 9010 | Rd = Rn = Bits32(opcode, 10, 8); |
| 9011 | setflags = !InITBlock(); |
| 9012 | imm32 = Bits32(opcode, 7, 0); // imm32 = ZeroExtend(imm8, 32) |
| 9013 | break; |
| 9014 | case eEncodingT3: |
| 9015 | Rd = Bits32(opcode, 11, 8); |
| 9016 | Rn = Bits32(opcode, 19, 16); |
| 9017 | setflags = BitIsSet(opcode, 20); |
| 9018 | imm32 = ThumbExpandImm(opcode); // imm32 = ThumbExpandImm(i:imm3:imm8) |
| 9019 | |
| 9020 | // if Rd == '1111' && S == '1' then SEE CMP (immediate); |
| 9021 | if (Rd == 15 && setflags) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9022 | return EmulateCMPImm (opcode, eEncodingT2); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 9023 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 9024 | // if Rn == '1101' then SEE SUB (SP minus immediate); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 9025 | if (Rn == 13) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9026 | return EmulateSUBSPImm (opcode, eEncodingT2); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 9027 | |
| 9028 | // if d == 13 || (d == 15 && S == '0') || n == 15 then UNPREDICTABLE; |
| 9029 | if (Rd == 13 || (Rd == 15 && !setflags) || Rn == 15) |
| 9030 | return false; |
| 9031 | break; |
| 9032 | case eEncodingT4: |
| 9033 | Rd = Bits32(opcode, 11, 8); |
| 9034 | Rn = Bits32(opcode, 19, 16); |
| 9035 | setflags = BitIsSet(opcode, 20); |
| 9036 | imm32 = ThumbImm12(opcode); // imm32 = ZeroExtend(i:imm3:imm8, 32) |
| 9037 | |
| 9038 | // if Rn == '1111' then SEE ADR; |
| 9039 | if (Rn == 15) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9040 | return EmulateADR (opcode, eEncodingT2); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 9041 | |
| 9042 | // if Rn == '1101' then SEE SUB (SP minus immediate); |
| 9043 | if (Rn == 13) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9044 | return EmulateSUBSPImm (opcode, eEncodingT3); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 9045 | |
| 9046 | if (BadReg(Rd)) |
| 9047 | return false; |
| 9048 | break; |
| 9049 | default: |
| 9050 | return false; |
| 9051 | } |
| 9052 | // Read the register value from the operand register Rn. |
| 9053 | uint32_t reg_val = ReadCoreReg(Rn, &success); |
| 9054 | if (!success) |
| 9055 | return false; |
| 9056 | |
| 9057 | AddWithCarryResult res = AddWithCarry(reg_val, ~imm32, 1); |
| 9058 | |
| 9059 | EmulateInstruction::Context context; |
| 9060 | context.type = EmulateInstruction::eContextImmediate; |
| 9061 | context.SetNoArgs (); |
| 9062 | |
| 9063 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 9064 | return false; |
| 9065 | |
| 9066 | return true; |
| 9067 | } |
| 9068 | |
| 9069 | // This instruction subtracts an immediate value from a register value, and writes the result |
| 9070 | // to the destination register. It can optionally update the condition flags based on the result. |
| 9071 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9072 | EmulateInstructionARM::EmulateSUBImmARM (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 9073 | { |
| 9074 | #if 0 |
| 9075 | // ARM pseudo code... |
| 9076 | if ConditionPassed() then |
| 9077 | EncodingSpecificOperations(); |
| 9078 | (result, carry, overflow) = AddWithCarry(R[n], NOT(imm32), '1'); |
| 9079 | if d == 15 then |
| 9080 | ALUWritePC(result); // setflags is always FALSE here |
| 9081 | else |
| 9082 | R[d] = result; |
| 9083 | if setflags then |
| 9084 | APSR.N = result<31>; |
| 9085 | APSR.Z = IsZeroBit(result); |
| 9086 | APSR.C = carry; |
| 9087 | APSR.V = overflow; |
| 9088 | #endif |
| 9089 | |
| 9090 | bool success = false; |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 9091 | |
| 9092 | uint32_t Rd; // the destination register |
| 9093 | uint32_t Rn; // the first operand |
| 9094 | bool setflags; |
| 9095 | uint32_t imm32; // the immediate value to be subtracted from the value obtained from Rn |
| 9096 | switch (encoding) { |
| 9097 | case eEncodingA1: |
| 9098 | Rd = Bits32(opcode, 15, 12); |
| 9099 | Rn = Bits32(opcode, 19, 16); |
| 9100 | setflags = BitIsSet(opcode, 20); |
| 9101 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
| 9102 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 9103 | // if Rn == '1111' && S == '0' then SEE ADR; |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 9104 | if (Rn == 15 && !setflags) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9105 | return EmulateADR (opcode, eEncodingA2); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 9106 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 9107 | // if Rn == '1101' then SEE SUB (SP minus immediate); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 9108 | if (Rn == 13) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9109 | return EmulateSUBSPImm (opcode, eEncodingA1); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 9110 | |
| 9111 | // if Rd == '1111' && S == '1' then SEE SUBS PC, LR and related instructions; |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 9112 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 9113 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 9114 | break; |
| 9115 | default: |
| 9116 | return false; |
| 9117 | } |
| 9118 | // Read the register value from the operand register Rn. |
| 9119 | uint32_t reg_val = ReadCoreReg(Rn, &success); |
| 9120 | if (!success) |
| 9121 | return false; |
| 9122 | |
| 9123 | AddWithCarryResult res = AddWithCarry(reg_val, ~imm32, 1); |
| 9124 | |
| 9125 | EmulateInstruction::Context context; |
| 9126 | context.type = EmulateInstruction::eContextImmediate; |
| 9127 | context.SetNoArgs (); |
| 9128 | |
| 9129 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 9130 | return false; |
| 9131 | |
| 9132 | return true; |
| 9133 | } |
| 9134 | |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9135 | // Test Equivalence (immediate) performs a bitwise exclusive OR operation on a register value and an |
| 9136 | // immediate value. It updates the condition flags based on the result, and discards the result. |
| 9137 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9138 | EmulateInstructionARM::EmulateTEQImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9139 | { |
| 9140 | #if 0 |
| 9141 | // ARM pseudo code... |
| 9142 | if ConditionPassed() then |
| 9143 | EncodingSpecificOperations(); |
| 9144 | result = R[n] EOR imm32; |
| 9145 | APSR.N = result<31>; |
| 9146 | APSR.Z = IsZeroBit(result); |
| 9147 | APSR.C = carry; |
| 9148 | // APSR.V unchanged |
| 9149 | #endif |
| 9150 | |
| 9151 | bool success = false; |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9152 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9153 | if (ConditionPassed(opcode)) |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9154 | { |
| 9155 | uint32_t Rn; |
| 9156 | uint32_t imm32; // the immediate value to be ANDed to the value obtained from Rn |
| 9157 | uint32_t carry; // the carry bit after ARM/Thumb Expand operation |
| 9158 | switch (encoding) |
| 9159 | { |
| 9160 | case eEncodingT1: |
| 9161 | Rn = Bits32(opcode, 19, 16); |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9162 | imm32 = ThumbExpandImm_C (opcode, APSR_C, carry); // (imm32, carry) = ThumbExpandImm(i:imm3:imm8, APSR.C) |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9163 | if (BadReg(Rn)) |
| 9164 | return false; |
| 9165 | break; |
| 9166 | case eEncodingA1: |
| 9167 | Rn = Bits32(opcode, 19, 16); |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9168 | imm32 = ARMExpandImm_C (opcode, APSR_C, carry); // (imm32, carry) = ARMExpandImm(imm12, APSR.C) |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9169 | break; |
| 9170 | default: |
| 9171 | return false; |
| 9172 | } |
| 9173 | |
| 9174 | // Read the first operand. |
| 9175 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 9176 | if (!success) |
| 9177 | return false; |
| 9178 | |
| 9179 | uint32_t result = val1 ^ imm32; |
| 9180 | |
| 9181 | EmulateInstruction::Context context; |
| 9182 | context.type = EmulateInstruction::eContextImmediate; |
| 9183 | context.SetNoArgs (); |
| 9184 | |
| 9185 | if (!WriteFlags(context, result, carry)) |
| 9186 | return false; |
| 9187 | } |
| 9188 | return true; |
| 9189 | } |
| 9190 | |
| 9191 | // Test Equivalence (register) performs a bitwise exclusive OR operation on a register value and an |
| 9192 | // optionally-shifted register value. It updates the condition flags based on the result, and discards |
| 9193 | // the result. |
| 9194 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9195 | EmulateInstructionARM::EmulateTEQReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9196 | { |
| 9197 | #if 0 |
| 9198 | // ARM pseudo code... |
| 9199 | if ConditionPassed() then |
| 9200 | EncodingSpecificOperations(); |
| 9201 | (shifted, carry) = Shift_C(R[m], shift_t, shift_n, APSR.C); |
| 9202 | result = R[n] EOR shifted; |
| 9203 | APSR.N = result<31>; |
| 9204 | APSR.Z = IsZeroBit(result); |
| 9205 | APSR.C = carry; |
| 9206 | // APSR.V unchanged |
| 9207 | #endif |
| 9208 | |
| 9209 | bool success = false; |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9210 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9211 | if (ConditionPassed(opcode)) |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9212 | { |
| 9213 | uint32_t Rn, Rm; |
| 9214 | ARM_ShifterType shift_t; |
| 9215 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 9216 | uint32_t carry; |
| 9217 | switch (encoding) |
| 9218 | { |
| 9219 | case eEncodingT1: |
| 9220 | Rn = Bits32(opcode, 19, 16); |
| 9221 | Rm = Bits32(opcode, 3, 0); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 9222 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9223 | if (BadReg(Rn) || BadReg(Rm)) |
| 9224 | return false; |
| 9225 | break; |
| 9226 | case eEncodingA1: |
| 9227 | Rn = Bits32(opcode, 19, 16); |
| 9228 | Rm = Bits32(opcode, 3, 0); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 9229 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9230 | break; |
| 9231 | default: |
| 9232 | return false; |
| 9233 | } |
| 9234 | |
| 9235 | // Read the first operand. |
| 9236 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 9237 | if (!success) |
| 9238 | return false; |
| 9239 | |
| 9240 | // Read the second operand. |
| 9241 | uint32_t val2 = ReadCoreReg(Rm, &success); |
| 9242 | if (!success) |
| 9243 | return false; |
| 9244 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 9245 | uint32_t shifted = Shift_C(val2, shift_t, shift_n, APSR_C, carry, &success); |
| 9246 | if (!success) |
| 9247 | return false; |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9248 | uint32_t result = val1 ^ shifted; |
| 9249 | |
| 9250 | EmulateInstruction::Context context; |
| 9251 | context.type = EmulateInstruction::eContextImmediate; |
| 9252 | context.SetNoArgs (); |
| 9253 | |
| 9254 | if (!WriteFlags(context, result, carry)) |
| 9255 | return false; |
| 9256 | } |
| 9257 | return true; |
| 9258 | } |
| 9259 | |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9260 | // Test (immediate) performs a bitwise AND operation on a register value and an immediate value. |
| 9261 | // It updates the condition flags based on the result, and discards the result. |
| 9262 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9263 | EmulateInstructionARM::EmulateTSTImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9264 | { |
| 9265 | #if 0 |
| 9266 | // ARM pseudo code... |
| 9267 | if ConditionPassed() then |
| 9268 | EncodingSpecificOperations(); |
| 9269 | result = R[n] AND imm32; |
| 9270 | APSR.N = result<31>; |
| 9271 | APSR.Z = IsZeroBit(result); |
| 9272 | APSR.C = carry; |
| 9273 | // APSR.V unchanged |
| 9274 | #endif |
| 9275 | |
| 9276 | bool success = false; |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9277 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9278 | if (ConditionPassed(opcode)) |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9279 | { |
| 9280 | uint32_t Rn; |
| 9281 | uint32_t imm32; // the immediate value to be ANDed to the value obtained from Rn |
| 9282 | uint32_t carry; // the carry bit after ARM/Thumb Expand operation |
| 9283 | switch (encoding) |
| 9284 | { |
| 9285 | case eEncodingT1: |
| 9286 | Rn = Bits32(opcode, 19, 16); |
| 9287 | imm32 = ThumbExpandImm_C(opcode, APSR_C, carry); // (imm32, carry) = ThumbExpandImm(i:imm3:imm8, APSR.C) |
| 9288 | if (BadReg(Rn)) |
| 9289 | return false; |
| 9290 | break; |
| 9291 | case eEncodingA1: |
| 9292 | Rn = Bits32(opcode, 19, 16); |
| 9293 | imm32 = ARMExpandImm_C(opcode, APSR_C, carry); // (imm32, carry) = ARMExpandImm(imm12, APSR.C) |
| 9294 | break; |
| 9295 | default: |
| 9296 | return false; |
| 9297 | } |
| 9298 | |
| 9299 | // Read the first operand. |
| 9300 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 9301 | if (!success) |
| 9302 | return false; |
| 9303 | |
| 9304 | uint32_t result = val1 & imm32; |
| 9305 | |
| 9306 | EmulateInstruction::Context context; |
| 9307 | context.type = EmulateInstruction::eContextImmediate; |
| 9308 | context.SetNoArgs (); |
| 9309 | |
| 9310 | if (!WriteFlags(context, result, carry)) |
| 9311 | return false; |
| 9312 | } |
| 9313 | return true; |
| 9314 | } |
| 9315 | |
| 9316 | // Test (register) performs a bitwise AND operation on a register value and an optionally-shifted register value. |
| 9317 | // It updates the condition flags based on the result, and discards the result. |
| 9318 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9319 | EmulateInstructionARM::EmulateTSTReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9320 | { |
| 9321 | #if 0 |
| 9322 | // ARM pseudo code... |
| 9323 | if ConditionPassed() then |
| 9324 | EncodingSpecificOperations(); |
| 9325 | (shifted, carry) = Shift_C(R[m], shift_t, shift_n, APSR.C); |
| 9326 | result = R[n] AND shifted; |
| 9327 | APSR.N = result<31>; |
| 9328 | APSR.Z = IsZeroBit(result); |
| 9329 | APSR.C = carry; |
| 9330 | // APSR.V unchanged |
| 9331 | #endif |
| 9332 | |
| 9333 | bool success = false; |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9334 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9335 | if (ConditionPassed(opcode)) |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9336 | { |
| 9337 | uint32_t Rn, Rm; |
| 9338 | ARM_ShifterType shift_t; |
| 9339 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 9340 | uint32_t carry; |
| 9341 | switch (encoding) |
| 9342 | { |
| 9343 | case eEncodingT1: |
| 9344 | Rn = Bits32(opcode, 2, 0); |
| 9345 | Rm = Bits32(opcode, 5, 3); |
| 9346 | shift_t = SRType_LSL; |
| 9347 | shift_n = 0; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 9348 | break; |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9349 | case eEncodingT2: |
| 9350 | Rn = Bits32(opcode, 19, 16); |
| 9351 | Rm = Bits32(opcode, 3, 0); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 9352 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9353 | if (BadReg(Rn) || BadReg(Rm)) |
| 9354 | return false; |
| 9355 | break; |
| 9356 | case eEncodingA1: |
| 9357 | Rn = Bits32(opcode, 19, 16); |
| 9358 | Rm = Bits32(opcode, 3, 0); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 9359 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9360 | break; |
| 9361 | default: |
| 9362 | return false; |
| 9363 | } |
| 9364 | |
| 9365 | // Read the first operand. |
| 9366 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 9367 | if (!success) |
| 9368 | return false; |
| 9369 | |
| 9370 | // Read the second operand. |
| 9371 | uint32_t val2 = ReadCoreReg(Rm, &success); |
| 9372 | if (!success) |
| 9373 | return false; |
| 9374 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 9375 | uint32_t shifted = Shift_C(val2, shift_t, shift_n, APSR_C, carry, &success); |
| 9376 | if (!success) |
| 9377 | return false; |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9378 | uint32_t result = val1 & shifted; |
| 9379 | |
| 9380 | EmulateInstruction::Context context; |
| 9381 | context.type = EmulateInstruction::eContextImmediate; |
| 9382 | context.SetNoArgs (); |
| 9383 | |
| 9384 | if (!WriteFlags(context, result, carry)) |
| 9385 | return false; |
| 9386 | } |
| 9387 | return true; |
| 9388 | } |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9389 | |
| 9390 | // A8.6.216 SUB (SP minus register) |
| 9391 | bool |
| 9392 | EmulateInstructionARM::EmulateSUBSPReg (const uint32_t opcode, const ARMEncoding encoding) |
| 9393 | { |
| 9394 | #if 0 |
| 9395 | if ConditionPassed() then |
| 9396 | EncodingSpecificOperations(); |
| 9397 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 9398 | (result, carry, overflow) = AddWithCarry(SP, NOT(shifted), Ô1Õ); |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9399 | if d == 15 then // Can only occur for ARM encoding |
| 9400 | ALUWritePC(result); // setflags is always FALSE here |
| 9401 | else |
| 9402 | R[d] = result; |
| 9403 | if setflags then |
| 9404 | APSR.N = result<31>; |
| 9405 | APSR.Z = IsZeroBit(result); |
| 9406 | APSR.C = carry; |
| 9407 | APSR.V = overflow; |
| 9408 | #endif |
| 9409 | |
| 9410 | bool success = false; |
| 9411 | |
| 9412 | if (ConditionPassed(opcode)) |
| 9413 | { |
| 9414 | uint32_t d; |
| 9415 | uint32_t m; |
| 9416 | bool setflags; |
| 9417 | ARM_ShifterType shift_t; |
| 9418 | uint32_t shift_n; |
| 9419 | |
| 9420 | switch (encoding) |
| 9421 | { |
| 9422 | case eEncodingT1: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 9423 | // d = UInt(Rd); m = UInt(Rm); setflags = (S == Ô1Õ); |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9424 | d = Bits32 (opcode, 11, 8); |
| 9425 | m = Bits32 (opcode, 3, 0); |
| 9426 | setflags = BitIsSet (opcode, 20); |
| 9427 | |
| 9428 | // (shift_t, shift_n) = DecodeImmShift(type, imm3:imm2); |
| 9429 | shift_n = DecodeImmShiftThumb (opcode, shift_t); |
| 9430 | |
| 9431 | // if d == 13 && (shift_t != SRType_LSL || shift_n > 3) then UNPREDICTABLE; |
| 9432 | if ((d == 13) && ((shift_t != SRType_LSL) || (shift_n > 3))) |
| 9433 | return false; |
| 9434 | |
| 9435 | // if d == 15 || BadReg(m) then UNPREDICTABLE; |
| 9436 | if ((d == 15) || BadReg (m)) |
| 9437 | return false; |
| 9438 | break; |
| 9439 | |
| 9440 | case eEncodingA1: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 9441 | // d = UInt(Rd); m = UInt(Rm); setflags = (S == Ô1Õ); |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9442 | d = Bits32 (opcode, 15, 12); |
| 9443 | m = Bits32 (opcode, 3, 0); |
| 9444 | setflags = BitIsSet (opcode, 20); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 9445 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 9446 | // if Rd == Ô1111Õ && S == Ô1Õ then SEE SUBS PC, LR and related instructions; |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 9447 | if (d == 15 && setflags) |
| 9448 | EmulateSUBSPcLrEtc (opcode, encoding); |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9449 | |
| 9450 | // (shift_t, shift_n) = DecodeImmShift(type, imm5); |
| 9451 | shift_n = DecodeImmShiftARM (opcode, shift_t); |
| 9452 | break; |
| 9453 | |
| 9454 | default: |
| 9455 | return false; |
| 9456 | } |
| 9457 | |
| 9458 | // shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 9459 | uint32_t Rm = ReadCoreReg (m, &success); |
| 9460 | if (!success) |
| 9461 | return false; |
| 9462 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 9463 | uint32_t shifted = Shift (Rm, shift_t, shift_n, APSR_C, &success); |
| 9464 | if (!success) |
| 9465 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9466 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 9467 | // (result, carry, overflow) = AddWithCarry(SP, NOT(shifted), Ô1Õ); |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9468 | uint32_t sp_val = ReadCoreReg (SP_REG, &success); |
| 9469 | if (!success) |
| 9470 | return false; |
| 9471 | |
| 9472 | AddWithCarryResult res = AddWithCarry (sp_val, ~shifted, 1); |
| 9473 | |
| 9474 | EmulateInstruction::Context context; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 9475 | context.type = eContextArithmetic; |
| 9476 | RegisterInfo sp_reg; |
| 9477 | GetRegisterInfo (eRegisterKindDWARF, dwarf_sp, sp_reg); |
| 9478 | RegisterInfo dwarf_reg; |
| 9479 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + m, dwarf_reg); |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9480 | context.SetRegisterRegisterOperands (sp_reg, dwarf_reg); |
| 9481 | |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9482 | if (!WriteCoreRegOptionalFlags(context, res.result, dwarf_r0 + d, setflags, res.carry_out, res.overflow)) |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9483 | return false; |
| 9484 | } |
| 9485 | return true; |
| 9486 | } |
| 9487 | |
| 9488 | |
| 9489 | // A8.6.7 ADD (register-shifted register) |
| 9490 | bool |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 9491 | EmulateInstructionARM::EmulateADDRegShift (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9492 | { |
| 9493 | #if 0 |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 9494 | if ConditionPassed() then |
| 9495 | EncodingSpecificOperations(); |
| 9496 | shift_n = UInt(R[s]<7:0>); |
| 9497 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 9498 | (result, carry, overflow) = AddWithCarry(R[n], shifted, Ô0Õ); |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 9499 | R[d] = result; |
| 9500 | if setflags then |
| 9501 | APSR.N = result<31>; |
| 9502 | APSR.Z = IsZeroBit(result); |
| 9503 | APSR.C = carry; |
| 9504 | APSR.V = overflow; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9505 | #endif |
| 9506 | |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 9507 | bool success = false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9508 | |
| 9509 | if (ConditionPassed(opcode)) |
| 9510 | { |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 9511 | uint32_t d; |
| 9512 | uint32_t n; |
| 9513 | uint32_t m; |
| 9514 | uint32_t s; |
| 9515 | bool setflags; |
| 9516 | ARM_ShifterType shift_t; |
| 9517 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9518 | switch (encoding) |
| 9519 | { |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 9520 | case eEncodingA1: |
| 9521 | // d = UInt(Rd); n = UInt(Rn); m = UInt(Rm); s = UInt(Rs); |
| 9522 | d = Bits32 (opcode, 15, 12); |
| 9523 | n = Bits32 (opcode, 19, 16); |
| 9524 | m = Bits32 (opcode, 3, 0); |
| 9525 | s = Bits32 (opcode, 11, 8); |
| 9526 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 9527 | // setflags = (S == Ô1Õ); shift_t = DecodeRegShift(type); |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 9528 | setflags = BitIsSet (opcode, 20); |
| 9529 | shift_t = DecodeRegShift (Bits32 (opcode, 6, 5)); |
| 9530 | |
| 9531 | // if d == 15 || n == 15 || m == 15 || s == 15 then UNPREDICTABLE; |
| 9532 | if ((d == 15) || (m == 15) || (m == 15) || (s == 15)) |
| 9533 | return false; |
| 9534 | break; |
| 9535 | |
| 9536 | default: |
| 9537 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9538 | } |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 9539 | |
| 9540 | // shift_n = UInt(R[s]<7:0>); |
| 9541 | uint32_t Rs = ReadCoreReg (s, &success); |
| 9542 | if (!success) |
| 9543 | return false; |
| 9544 | |
| 9545 | uint32_t shift_n = Bits32 (Rs, 7, 0); |
| 9546 | |
| 9547 | // shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 9548 | uint32_t Rm = ReadCoreReg (m, &success); |
| 9549 | if (!success) |
| 9550 | return false; |
| 9551 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 9552 | uint32_t shifted = Shift (Rm, shift_t, shift_n, APSR_C, &success); |
| 9553 | if (!success) |
| 9554 | return false; |
| 9555 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 9556 | // (result, carry, overflow) = AddWithCarry(R[n], shifted, Ô0Õ); |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 9557 | uint32_t Rn = ReadCoreReg (n, &success); |
| 9558 | if (!success) |
| 9559 | return false; |
| 9560 | |
| 9561 | AddWithCarryResult res = AddWithCarry (Rn, shifted, 0); |
| 9562 | |
| 9563 | // R[d] = result; |
| 9564 | EmulateInstruction::Context context; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 9565 | context.type = eContextArithmetic; |
| 9566 | RegisterInfo reg_n; |
| 9567 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, reg_n); |
| 9568 | RegisterInfo reg_m; |
| 9569 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + m, reg_m); |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 9570 | |
| 9571 | context.SetRegisterRegisterOperands (reg_n, reg_m); |
| 9572 | |
| 9573 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + d, res.result)) |
| 9574 | return false; |
| 9575 | |
| 9576 | // if setflags then |
| 9577 | // APSR.N = result<31>; |
| 9578 | // APSR.Z = IsZeroBit(result); |
| 9579 | // APSR.C = carry; |
| 9580 | // APSR.V = overflow; |
| 9581 | if (setflags) |
| 9582 | return WriteFlags (context, res.result, res.carry_out, res.overflow); |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9583 | } |
| 9584 | return true; |
| 9585 | } |
| 9586 | |
| 9587 | // A8.6.213 SUB (register) |
| 9588 | bool |
| 9589 | EmulateInstructionARM::EmulateSUBReg (const uint32_t opcode, const ARMEncoding encoding) |
| 9590 | { |
| 9591 | #if 0 |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9592 | if ConditionPassed() then |
| 9593 | EncodingSpecificOperations(); |
| 9594 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 9595 | (result, carry, overflow) = AddWithCarry(R[n], NOT(shifted), Ô1Õ); |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9596 | if d == 15 then // Can only occur for ARM encoding |
| 9597 | ALUWritePC(result); // setflags is always FALSE here |
| 9598 | else |
| 9599 | R[d] = result; |
| 9600 | if setflags then |
| 9601 | APSR.N = result<31>; |
| 9602 | APSR.Z = IsZeroBit(result); |
| 9603 | APSR.C = carry; |
| 9604 | APSR.V = overflow; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9605 | #endif |
| 9606 | |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9607 | bool success = false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9608 | |
| 9609 | if (ConditionPassed(opcode)) |
| 9610 | { |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9611 | uint32_t d; |
| 9612 | uint32_t n; |
| 9613 | uint32_t m; |
| 9614 | bool setflags; |
| 9615 | ARM_ShifterType shift_t; |
| 9616 | uint32_t shift_n; |
| 9617 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9618 | switch (encoding) |
| 9619 | { |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9620 | case eEncodingT1: |
| 9621 | // d = UInt(Rd); n = UInt(Rn); m = UInt(Rm); setflags = !InITBlock(); |
| 9622 | d = Bits32 (opcode, 2, 0); |
| 9623 | n = Bits32 (opcode, 5, 3); |
| 9624 | m = Bits32 (opcode, 8, 6); |
| 9625 | setflags = !InITBlock(); |
| 9626 | |
| 9627 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 9628 | shift_t = SRType_LSL; |
| 9629 | shift_n = 0; |
| 9630 | |
| 9631 | break; |
| 9632 | |
| 9633 | case eEncodingT2: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 9634 | // if Rd == Ô1111Õ && S == Ô1Õ then SEE CMP (register); |
| 9635 | // if Rn == Ô1101Õ then SEE SUB (SP minus register); |
| 9636 | // d = UInt(Rd); n = UInt(Rn); m = UInt(Rm); setflags = (S == Ô1Õ); |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9637 | d = Bits32 (opcode, 11, 8); |
| 9638 | n = Bits32 (opcode, 19, 16); |
| 9639 | m = Bits32 (opcode, 3, 0); |
| 9640 | setflags = BitIsSet (opcode, 20); |
| 9641 | |
| 9642 | // (shift_t, shift_n) = DecodeImmShift(type, imm3:imm2); |
| 9643 | shift_n = DecodeImmShiftThumb (opcode, shift_t); |
| 9644 | |
| 9645 | // if d == 13 || (d == 15 && S == '0') || n == 15 || BadReg(m) then UNPREDICTABLE; |
| 9646 | if ((d == 13) || ((d == 15) && BitIsClear (opcode, 20)) || (n == 15) || BadReg (m)) |
| 9647 | return false; |
| 9648 | |
| 9649 | break; |
| 9650 | |
| 9651 | case eEncodingA1: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 9652 | // if Rn == Ô1101Õ then SEE SUB (SP minus register); |
| 9653 | // d = UInt(Rd); n = UInt(Rn); m = UInt(Rm); setflags = (S == Ô1Õ); |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9654 | d = Bits32 (opcode, 15, 12); |
| 9655 | n = Bits32 (opcode, 19, 16); |
| 9656 | m = Bits32 (opcode, 3, 0); |
| 9657 | setflags = BitIsSet (opcode, 20); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 9658 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 9659 | // if Rd == Ô1111Õ && S == Ô1Õ then SEE SUBS PC, LR and related instructions; |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 9660 | if ((d == 15) && setflags) |
| 9661 | EmulateSUBSPcLrEtc (opcode, encoding); |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9662 | |
| 9663 | // (shift_t, shift_n) = DecodeImmShift(type, imm5); |
| 9664 | shift_n = DecodeImmShiftARM (opcode, shift_t); |
| 9665 | |
| 9666 | break; |
| 9667 | |
| 9668 | default: |
| 9669 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9670 | } |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9671 | |
| 9672 | // shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 9673 | uint32_t Rm = ReadCoreReg (m, &success); |
| 9674 | if (!success) |
| 9675 | return false; |
| 9676 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 9677 | uint32_t shifted = Shift (Rm, shift_t, shift_n, APSR_C, &success); |
| 9678 | if (!success) |
| 9679 | return false; |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9680 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 9681 | // (result, carry, overflow) = AddWithCarry(R[n], NOT(shifted), Ô1Õ); |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9682 | uint32_t Rn = ReadCoreReg (n, &success); |
| 9683 | if (!success) |
| 9684 | return false; |
| 9685 | |
| 9686 | AddWithCarryResult res = AddWithCarry (Rn, ~shifted, 1); |
| 9687 | |
| 9688 | // if d == 15 then // Can only occur for ARM encoding |
| 9689 | // ALUWritePC(result); // setflags is always FALSE here |
| 9690 | // else |
| 9691 | // R[d] = result; |
| 9692 | // if setflags then |
| 9693 | // APSR.N = result<31>; |
| 9694 | // APSR.Z = IsZeroBit(result); |
| 9695 | // APSR.C = carry; |
| 9696 | // APSR.V = overflow; |
| 9697 | |
| 9698 | EmulateInstruction::Context context; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 9699 | context.type = eContextArithmetic; |
| 9700 | RegisterInfo reg_n; |
| 9701 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, reg_n); |
| 9702 | RegisterInfo reg_m; |
| 9703 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + m, reg_m); |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9704 | context.SetRegisterRegisterOperands (reg_n, reg_m); |
| 9705 | |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9706 | if (!WriteCoreRegOptionalFlags (context, res.result, dwarf_r0 + d, setflags, res.carry_out, res.overflow)) |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9707 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9708 | } |
| 9709 | return true; |
| 9710 | } |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9711 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9712 | // A8.6.202 STREX |
Caroline Tice | 5168b6c | 2011-03-30 05:15:46 +0000 | [diff] [blame] | 9713 | // Store Register Exclusive calculates an address from a base register value and an immediate offset, and stores a |
| 9714 | // word from a register to memory if the executing processor has exclusive access to the memory addressed. |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9715 | bool |
| 9716 | EmulateInstructionARM::EmulateSTREX (const uint32_t opcode, const ARMEncoding encoding) |
| 9717 | { |
| 9718 | #if 0 |
Caroline Tice | 5168b6c | 2011-03-30 05:15:46 +0000 | [diff] [blame] | 9719 | if ConditionPassed() then |
| 9720 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 9721 | address = R[n] + imm32; |
| 9722 | if ExclusiveMonitorsPass(address,4) then |
| 9723 | MemA[address,4] = R[t]; |
| 9724 | R[d] = 0; |
| 9725 | else |
| 9726 | R[d] = 1; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9727 | #endif |
| 9728 | |
Caroline Tice | 5168b6c | 2011-03-30 05:15:46 +0000 | [diff] [blame] | 9729 | bool success = false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9730 | |
| 9731 | if (ConditionPassed(opcode)) |
| 9732 | { |
Caroline Tice | 5168b6c | 2011-03-30 05:15:46 +0000 | [diff] [blame] | 9733 | uint32_t d; |
| 9734 | uint32_t t; |
| 9735 | uint32_t n; |
| 9736 | uint32_t imm32; |
| 9737 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 9738 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9739 | switch (encoding) |
| 9740 | { |
Caroline Tice | 5168b6c | 2011-03-30 05:15:46 +0000 | [diff] [blame] | 9741 | case eEncodingT1: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 9742 | // d = UInt(Rd); t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm8:Õ00Õ, 32); |
Caroline Tice | 5168b6c | 2011-03-30 05:15:46 +0000 | [diff] [blame] | 9743 | d = Bits32 (opcode, 11, 8); |
| 9744 | t = Bits32 (opcode, 15, 12); |
| 9745 | n = Bits32 (opcode, 19, 16); |
| 9746 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 9747 | |
| 9748 | // if BadReg(d) || BadReg(t) || n == 15 then UNPREDICTABLE; |
| 9749 | if (BadReg (d) || BadReg (t) || (n == 15)) |
| 9750 | return false; |
| 9751 | |
| 9752 | // if d == n || d == t then UNPREDICTABLE; |
| 9753 | if ((d == n) || (d == t)) |
| 9754 | return false; |
| 9755 | |
| 9756 | break; |
| 9757 | |
| 9758 | case eEncodingA1: |
| 9759 | // d = UInt(Rd); t = UInt(Rt); n = UInt(Rn); imm32 = Zeros(32); // Zero offset |
| 9760 | d = Bits32 (opcode, 15, 12); |
| 9761 | t = Bits32 (opcode, 3, 0); |
| 9762 | n = Bits32 (opcode, 19, 16); |
| 9763 | imm32 = 0; |
| 9764 | |
| 9765 | // if d == 15 || t == 15 || n == 15 then UNPREDICTABLE; |
| 9766 | if ((d == 15) || (t == 15) || (n == 15)) |
| 9767 | return false; |
| 9768 | |
| 9769 | // if d == n || d == t then UNPREDICTABLE; |
| 9770 | if ((d == n) || (d == t)) |
| 9771 | return false; |
| 9772 | |
| 9773 | break; |
| 9774 | |
| 9775 | default: |
| 9776 | return false; |
| 9777 | } |
| 9778 | |
| 9779 | // address = R[n] + imm32; |
| 9780 | uint32_t Rn = ReadCoreReg (n, &success); |
| 9781 | if (!success) |
| 9782 | return false; |
| 9783 | |
| 9784 | addr_t address = Rn + imm32; |
| 9785 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 9786 | RegisterInfo base_reg; |
| 9787 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
| 9788 | RegisterInfo data_reg; |
| 9789 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + t, data_reg); |
Caroline Tice | 5168b6c | 2011-03-30 05:15:46 +0000 | [diff] [blame] | 9790 | EmulateInstruction::Context context; |
| 9791 | context.type = eContextRegisterStore; |
| 9792 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, imm32); |
| 9793 | |
| 9794 | // if ExclusiveMonitorsPass(address,4) then |
| 9795 | // if (ExclusiveMonitorsPass (address, addr_byte_size)) -- For now, for the sake of emulation, we will say this |
| 9796 | // always return true. |
| 9797 | if (true) |
| 9798 | { |
| 9799 | // MemA[address,4] = R[t]; |
| 9800 | uint32_t Rt = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + t, 0, &success); |
| 9801 | if (!success) |
| 9802 | return false; |
| 9803 | |
| 9804 | if (!MemAWrite (context, address, Rt, addr_byte_size)) |
| 9805 | return false; |
| 9806 | |
| 9807 | // R[d] = 0; |
| 9808 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, 0)) |
| 9809 | return false; |
| 9810 | } |
| 9811 | else |
| 9812 | { |
| 9813 | // R[d] = 1; |
| 9814 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, 1)) |
| 9815 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9816 | } |
| 9817 | } |
| 9818 | return true; |
| 9819 | } |
| 9820 | |
| 9821 | // A8.6.197 STRB (immediate, ARM) |
| 9822 | bool |
| 9823 | EmulateInstructionARM::EmulateSTRBImmARM (const uint32_t opcode, const ARMEncoding encoding) |
| 9824 | { |
| 9825 | #if 0 |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9826 | if ConditionPassed() then |
| 9827 | EncodingSpecificOperations(); |
| 9828 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 9829 | address = if index then offset_addr else R[n]; |
| 9830 | MemU[address,1] = R[t]<7:0>; |
| 9831 | if wback then R[n] = offset_addr; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9832 | #endif |
| 9833 | |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9834 | bool success = false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9835 | |
| 9836 | if (ConditionPassed(opcode)) |
| 9837 | { |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9838 | uint32_t t; |
| 9839 | uint32_t n; |
| 9840 | uint32_t imm32; |
| 9841 | bool index; |
| 9842 | bool add; |
| 9843 | bool wback; |
| 9844 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9845 | switch (encoding) |
| 9846 | { |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9847 | case eEncodingA1: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 9848 | // if P == Ô0Õ && W == Ô1Õ then SEE STRBT; |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9849 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 9850 | t = Bits32 (opcode, 15, 12); |
| 9851 | n = Bits32 (opcode, 19, 16); |
| 9852 | imm32 = Bits32 (opcode, 11, 0); |
| 9853 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 9854 | // index = (P == Ô1Õ); add = (U == Ô1Õ); wback = (P == Ô0Õ) || (W == Ô1Õ); |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9855 | index = BitIsSet (opcode, 24); |
| 9856 | add = BitIsSet (opcode, 23); |
| 9857 | wback = BitIsClear (opcode, 24) || BitIsSet (opcode, 21); |
| 9858 | |
| 9859 | // if t == 15 then UNPREDICTABLE; |
| 9860 | if (t == 15) |
| 9861 | return false; |
| 9862 | |
| 9863 | // if wback && (n == 15 || n == t) then UNPREDICTABLE; |
| 9864 | if (wback && ((n == 15) || (n == t))) |
| 9865 | return false; |
| 9866 | |
| 9867 | break; |
| 9868 | |
| 9869 | default: |
| 9870 | return false; |
| 9871 | } |
| 9872 | |
| 9873 | // offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 9874 | uint32_t Rn = ReadCoreReg (n, &success); |
| 9875 | if (!success) |
| 9876 | return false; |
| 9877 | |
| 9878 | addr_t offset_addr; |
| 9879 | if (add) |
| 9880 | offset_addr = Rn + imm32; |
| 9881 | else |
| 9882 | offset_addr = Rn - imm32; |
| 9883 | |
| 9884 | // address = if index then offset_addr else R[n]; |
| 9885 | addr_t address; |
| 9886 | if (index) |
| 9887 | address = offset_addr; |
| 9888 | else |
| 9889 | address = Rn; |
| 9890 | |
| 9891 | // MemU[address,1] = R[t]<7:0>; |
| 9892 | uint32_t Rt = ReadCoreReg (t, &success); |
| 9893 | if (!success) |
| 9894 | return false; |
| 9895 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 9896 | RegisterInfo base_reg; |
| 9897 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
| 9898 | RegisterInfo data_reg; |
| 9899 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + t, data_reg); |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9900 | EmulateInstruction::Context context; |
| 9901 | context.type = eContextRegisterStore; |
| 9902 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 9903 | |
| 9904 | if (!MemUWrite (context, address, Bits32 (Rt, 7, 0), 1)) |
| 9905 | return false; |
| 9906 | |
| 9907 | // if wback then R[n] = offset_addr; |
| 9908 | if (wback) |
| 9909 | { |
Caroline Tice | 523c554 | 2011-04-13 00:42:12 +0000 | [diff] [blame] | 9910 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9911 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9912 | } |
| 9913 | } |
| 9914 | return true; |
| 9915 | } |
| 9916 | |
| 9917 | // A8.6.194 STR (immediate, ARM) |
| 9918 | bool |
| 9919 | EmulateInstructionARM::EmulateSTRImmARM (const uint32_t opcode, const ARMEncoding encoding) |
| 9920 | { |
| 9921 | #if 0 |
Caroline Tice | d42b3cc | 2011-03-30 06:03:24 +0000 | [diff] [blame] | 9922 | if ConditionPassed() then |
| 9923 | EncodingSpecificOperations(); |
| 9924 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 9925 | address = if index then offset_addr else R[n]; |
| 9926 | MemU[address,4] = if t == 15 then PCStoreValue() else R[t]; |
| 9927 | if wback then R[n] = offset_addr; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9928 | #endif |
| 9929 | |
Caroline Tice | d42b3cc | 2011-03-30 06:03:24 +0000 | [diff] [blame] | 9930 | bool success = false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9931 | |
| 9932 | if (ConditionPassed(opcode)) |
| 9933 | { |
Caroline Tice | d42b3cc | 2011-03-30 06:03:24 +0000 | [diff] [blame] | 9934 | uint32_t t; |
| 9935 | uint32_t n; |
| 9936 | uint32_t imm32; |
| 9937 | bool index; |
| 9938 | bool add; |
| 9939 | bool wback; |
| 9940 | |
| 9941 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 9942 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9943 | switch (encoding) |
| 9944 | { |
Caroline Tice | d42b3cc | 2011-03-30 06:03:24 +0000 | [diff] [blame] | 9945 | case eEncodingA1: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 9946 | // if P == Ô0Õ && W == Ô1Õ then SEE STRT; |
| 9947 | // if Rn == Ô1101Õ && P == Ô1Õ && U == Ô0Õ && W == Ô1Õ && imm12 == Ô000000000100Õ then SEE PUSH; |
Caroline Tice | d42b3cc | 2011-03-30 06:03:24 +0000 | [diff] [blame] | 9948 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 9949 | t = Bits32 (opcode, 15, 12); |
| 9950 | n = Bits32 (opcode, 19, 16); |
| 9951 | imm32 = Bits32 (opcode, 11, 0); |
| 9952 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 9953 | // index = (P == Ô1Õ); add = (U == Ô1Õ); wback = (P == Ô0Õ) || (W == Ô1Õ); |
Caroline Tice | d42b3cc | 2011-03-30 06:03:24 +0000 | [diff] [blame] | 9954 | index = BitIsSet (opcode, 24); |
| 9955 | add = BitIsSet (opcode, 23); |
| 9956 | wback = BitIsClear (opcode, 24) || BitIsSet (opcode, 21); |
| 9957 | |
| 9958 | // if wback && (n == 15 || n == t) then UNPREDICTABLE; |
| 9959 | if (wback && ((n == 15) || (n == t))) |
| 9960 | return false; |
| 9961 | |
| 9962 | break; |
| 9963 | |
| 9964 | default: |
| 9965 | return false; |
| 9966 | } |
| 9967 | |
| 9968 | // offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 9969 | uint32_t Rn = ReadCoreReg (n, &success); |
| 9970 | if (!success) |
| 9971 | return false; |
| 9972 | |
| 9973 | addr_t offset_addr; |
| 9974 | if (add) |
| 9975 | offset_addr = Rn + imm32; |
| 9976 | else |
| 9977 | offset_addr = Rn - imm32; |
| 9978 | |
| 9979 | // address = if index then offset_addr else R[n]; |
| 9980 | addr_t address; |
| 9981 | if (index) |
| 9982 | address = offset_addr; |
| 9983 | else |
| 9984 | address = Rn; |
| 9985 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 9986 | RegisterInfo base_reg; |
| 9987 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
| 9988 | RegisterInfo data_reg; |
| 9989 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + t, data_reg); |
Caroline Tice | d42b3cc | 2011-03-30 06:03:24 +0000 | [diff] [blame] | 9990 | EmulateInstruction::Context context; |
| 9991 | context.type = eContextRegisterStore; |
| 9992 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 9993 | |
| 9994 | // MemU[address,4] = if t == 15 then PCStoreValue() else R[t]; |
| 9995 | uint32_t Rt = ReadCoreReg (t, &success); |
| 9996 | if (!success) |
| 9997 | return false; |
| 9998 | |
| 9999 | if (t == 15) |
| 10000 | { |
Caroline Tice | e98b958 | 2011-03-30 16:05:23 +0000 | [diff] [blame] | 10001 | uint32_t pc_value = ReadCoreReg (PC_REG, &success); |
Caroline Tice | d42b3cc | 2011-03-30 06:03:24 +0000 | [diff] [blame] | 10002 | if (!success) |
| 10003 | return false; |
| 10004 | |
| 10005 | if (!MemUWrite (context, address, pc_value, addr_byte_size)) |
| 10006 | return false; |
| 10007 | } |
| 10008 | else |
| 10009 | { |
| 10010 | if (!MemUWrite (context, address, Rt, addr_byte_size)) |
| 10011 | return false; |
| 10012 | } |
| 10013 | |
| 10014 | // if wback then R[n] = offset_addr; |
| 10015 | if (wback) |
| 10016 | { |
| 10017 | context.type = eContextAdjustBaseRegister; |
| 10018 | context.SetImmediate (offset_addr); |
| 10019 | |
| 10020 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 10021 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10022 | } |
| 10023 | } |
| 10024 | return true; |
| 10025 | } |
| 10026 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10027 | // A8.6.66 LDRD (immediate) |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 10028 | // Load Register Dual (immediate) calculates an address from a base register value and an immediate offset, loads two |
| 10029 | // words from memory, and writes them to two registers. It can use offset, post-indexed, or pre-indexed addressing. |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10030 | bool |
| 10031 | EmulateInstructionARM::EmulateLDRDImmediate (const uint32_t opcode, const ARMEncoding encoding) |
| 10032 | { |
| 10033 | #if 0 |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 10034 | if ConditionPassed() then |
| 10035 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 10036 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 10037 | address = if index then offset_addr else R[n]; |
| 10038 | R[t] = MemA[address,4]; |
| 10039 | R[t2] = MemA[address+4,4]; |
| 10040 | if wback then R[n] = offset_addr; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10041 | #endif |
| 10042 | |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 10043 | bool success = false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10044 | |
| 10045 | if (ConditionPassed(opcode)) |
| 10046 | { |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 10047 | uint32_t t; |
| 10048 | uint32_t t2; |
| 10049 | uint32_t n; |
| 10050 | uint32_t imm32; |
| 10051 | bool index; |
| 10052 | bool add; |
| 10053 | bool wback; |
| 10054 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10055 | switch (encoding) |
| 10056 | { |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 10057 | case eEncodingT1: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10058 | //if P == Ô0Õ && W == Ô0Õ then SEE ÒRelated encodingsÓ; |
| 10059 | //if Rn == Ô1111Õ then SEE LDRD (literal); |
| 10060 | //t = UInt(Rt); t2 = UInt(Rt2); n = UInt(Rn); imm32 = ZeroExtend(imm8:Õ00Õ, 32); |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 10061 | t = Bits32 (opcode, 15, 12); |
| 10062 | t2 = Bits32 (opcode, 11, 8); |
| 10063 | n = Bits32 (opcode, 19, 16); |
| 10064 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 10065 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10066 | //index = (P == Ô1Õ); add = (U == Ô1Õ); wback = (W == Ô1Õ); |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 10067 | index = BitIsSet (opcode, 24); |
| 10068 | add = BitIsSet (opcode, 23); |
| 10069 | wback = BitIsSet (opcode, 21); |
| 10070 | |
| 10071 | //if wback && (n == t || n == t2) then UNPREDICTABLE; |
| 10072 | if (wback && ((n == t) || (n == t2))) |
| 10073 | return false; |
| 10074 | |
| 10075 | //if BadReg(t) || BadReg(t2) || t == t2 then UNPREDICTABLE; |
| 10076 | if (BadReg (t) || BadReg (t2) || (t == t2)) |
| 10077 | return false; |
| 10078 | |
| 10079 | break; |
| 10080 | |
| 10081 | case eEncodingA1: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10082 | //if Rn == Ô1111Õ then SEE LDRD (literal); |
| 10083 | //if Rt<0> == Ô1Õ then UNPREDICTABLE; |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 10084 | //t = UInt(Rt); t2 = t+1; n = UInt(Rn); imm32 = ZeroExtend(imm4H:imm4L, 32); |
| 10085 | t = Bits32 (opcode, 15, 12); |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10086 | if (BitIsSet (t, 0)) |
| 10087 | return false; |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 10088 | t2 = t + 1; |
| 10089 | n = Bits32 (opcode, 19, 16); |
| 10090 | imm32 = (Bits32 (opcode, 11, 8) << 4) | Bits32 (opcode, 3, 0); |
| 10091 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10092 | //index = (P == Ô1Õ); add = (U == Ô1Õ); wback = (P == Ô0Õ) || (W == Ô1Õ); |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 10093 | index = BitIsSet (opcode, 24); |
| 10094 | add = BitIsSet (opcode, 23); |
| 10095 | wback = BitIsClear (opcode, 24) || BitIsSet (opcode, 21); |
| 10096 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10097 | //if P == Ô0Õ && W == Ô1Õ then UNPREDICTABLE; |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 10098 | if (BitIsClear (opcode, 24) && BitIsSet (opcode, 21)) |
| 10099 | return false; |
| 10100 | |
| 10101 | //if wback && (n == t || n == t2) then UNPREDICTABLE; |
| 10102 | if (wback && ((n == t) || (n == t2))) |
| 10103 | return false; |
| 10104 | |
| 10105 | //if t2 == 15 then UNPREDICTABLE; |
| 10106 | if (t2 == 15) |
| 10107 | return false; |
| 10108 | |
| 10109 | break; |
| 10110 | |
| 10111 | default: |
| 10112 | return false; |
| 10113 | } |
| 10114 | |
| 10115 | //offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 10116 | uint32_t Rn = ReadCoreReg (n, &success); |
| 10117 | if (!success) |
| 10118 | return false; |
| 10119 | |
| 10120 | addr_t offset_addr; |
| 10121 | if (add) |
| 10122 | offset_addr = Rn + imm32; |
| 10123 | else |
| 10124 | offset_addr = Rn - imm32; |
| 10125 | |
| 10126 | //address = if index then offset_addr else R[n]; |
| 10127 | addr_t address; |
| 10128 | if (index) |
| 10129 | address = offset_addr; |
| 10130 | else |
| 10131 | address = Rn; |
| 10132 | |
| 10133 | //R[t] = MemA[address,4]; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 10134 | RegisterInfo base_reg; |
| 10135 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 10136 | |
| 10137 | EmulateInstruction::Context context; |
| 10138 | context.type = eContextRegisterLoad; |
| 10139 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 10140 | |
| 10141 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 10142 | uint32_t data = MemARead (context, address, addr_byte_size, 0, &success); |
| 10143 | if (!success) |
| 10144 | return false; |
| 10145 | |
| 10146 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 10147 | return false; |
| 10148 | |
| 10149 | //R[t2] = MemA[address+4,4]; |
| 10150 | |
| 10151 | context.SetRegisterPlusOffset (base_reg, (address + 4) - Rn); |
| 10152 | data = MemARead (context, address + 4, addr_byte_size, 0, &success); |
| 10153 | if (!success) |
| 10154 | return false; |
| 10155 | |
| 10156 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t2, data)) |
| 10157 | return false; |
| 10158 | |
| 10159 | //if wback then R[n] = offset_addr; |
| 10160 | if (wback) |
| 10161 | { |
| 10162 | context.type = eContextAdjustBaseRegister; |
| 10163 | context.SetAddress (offset_addr); |
| 10164 | |
| 10165 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 10166 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10167 | } |
| 10168 | } |
| 10169 | return true; |
| 10170 | } |
| 10171 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10172 | // A8.6.68 LDRD (register) |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10173 | // Load Register Dual (register) calculates an address from a base register value and a register offset, loads two |
| 10174 | // words from memory, and writes them to two registers. It can use offset, post-indexed or pre-indexed addressing. |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10175 | bool |
| 10176 | EmulateInstructionARM::EmulateLDRDRegister (const uint32_t opcode, const ARMEncoding encoding) |
| 10177 | { |
| 10178 | #if 0 |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10179 | if ConditionPassed() then |
| 10180 | EncodingSpecificOperations(); |
| 10181 | offset_addr = if add then (R[n] + R[m]) else (R[n] - R[m]); |
| 10182 | address = if index then offset_addr else R[n]; |
| 10183 | R[t] = MemA[address,4]; |
| 10184 | R[t2] = MemA[address+4,4]; |
| 10185 | if wback then R[n] = offset_addr; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10186 | #endif |
| 10187 | |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10188 | bool success = false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10189 | |
| 10190 | if (ConditionPassed(opcode)) |
| 10191 | { |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10192 | uint32_t t; |
| 10193 | uint32_t t2; |
| 10194 | uint32_t n; |
| 10195 | uint32_t m; |
| 10196 | bool index; |
| 10197 | bool add; |
| 10198 | bool wback; |
| 10199 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10200 | switch (encoding) |
| 10201 | { |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10202 | case eEncodingA1: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10203 | // if Rt<0> == Ô1Õ then UNPREDICTABLE; |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10204 | // t = UInt(Rt); t2 = t+1; n = UInt(Rn); m = UInt(Rm); |
| 10205 | t = Bits32 (opcode, 15, 12); |
| 10206 | if (BitIsSet (t, 0)) |
| 10207 | return false; |
| 10208 | t2 = t + 1; |
| 10209 | n = Bits32 (opcode, 19, 16); |
| 10210 | m = Bits32 (opcode, 3, 0); |
| 10211 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10212 | // index = (P == Ô1Õ); add = (U == Ô1Õ); wback = (P == Ô0Õ) || (W == Ô1Õ); |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10213 | index = BitIsSet (opcode, 24); |
| 10214 | add = BitIsSet (opcode, 23); |
| 10215 | wback = BitIsClear (opcode, 24) || BitIsSet (opcode, 21); |
| 10216 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10217 | // if P == Ô0Õ && W == Ô1Õ then UNPREDICTABLE; |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10218 | if (BitIsClear (opcode, 24) && BitIsSet (opcode, 21)) |
| 10219 | return false; |
| 10220 | |
| 10221 | // if t2 == 15 || m == 15 || m == t || m == t2 then UNPREDICTABLE; |
| 10222 | if ((t2 == 15) || (m == 15) || (m == t) || (m == t2)) |
| 10223 | return false; |
| 10224 | |
| 10225 | // if wback && (n == 15 || n == t || n == t2) then UNPREDICTABLE; |
| 10226 | if (wback && ((n == 15) || (n == t) || (n == t2))) |
| 10227 | return false; |
| 10228 | |
| 10229 | // if ArchVersion() < 6 && wback && m == n then UNPREDICTABLE; |
| 10230 | if ((ArchVersion() < 6) && wback && (m == n)) |
| 10231 | return false; |
| 10232 | break; |
| 10233 | |
| 10234 | default: |
| 10235 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10236 | } |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10237 | |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10238 | uint32_t Rn = ReadCoreReg (n, &success); |
| 10239 | if (!success) |
| 10240 | return false; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 10241 | RegisterInfo base_reg; |
| 10242 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10243 | |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10244 | uint32_t Rm = ReadCoreReg (m, &success); |
| 10245 | if (!success) |
| 10246 | return false; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 10247 | RegisterInfo offset_reg; |
| 10248 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + m, offset_reg); |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10249 | |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10250 | // offset_addr = if add then (R[n] + R[m]) else (R[n] - R[m]); |
| 10251 | addr_t offset_addr; |
| 10252 | if (add) |
| 10253 | offset_addr = Rn + Rm; |
| 10254 | else |
| 10255 | offset_addr = Rn - Rm; |
| 10256 | |
| 10257 | // address = if index then offset_addr else R[n]; |
| 10258 | addr_t address; |
| 10259 | if (index) |
| 10260 | address = offset_addr; |
| 10261 | else |
| 10262 | address = Rn; |
| 10263 | |
| 10264 | EmulateInstruction::Context context; |
| 10265 | context.type = eContextRegisterLoad; |
| 10266 | context.SetRegisterPlusIndirectOffset (base_reg, offset_reg); |
| 10267 | |
| 10268 | // R[t] = MemA[address,4]; |
| 10269 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 10270 | uint32_t data = MemARead (context, address, addr_byte_size, 0, &success); |
| 10271 | if (!success) |
| 10272 | return false; |
| 10273 | |
| 10274 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 10275 | return false; |
| 10276 | |
| 10277 | // R[t2] = MemA[address+4,4]; |
| 10278 | |
| 10279 | data = MemARead (context, address + 4, addr_byte_size, 0, &success); |
| 10280 | if (!success) |
| 10281 | return false; |
| 10282 | |
| 10283 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t2, data)) |
| 10284 | return false; |
| 10285 | |
| 10286 | // if wback then R[n] = offset_addr; |
| 10287 | if (wback) |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10288 | { |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10289 | context.type = eContextAdjustBaseRegister; |
| 10290 | context.SetAddress (offset_addr); |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10291 | |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10292 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 10293 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10294 | } |
| 10295 | } |
| 10296 | return true; |
| 10297 | } |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10298 | |
| 10299 | // A8.6.200 STRD (immediate) |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10300 | // Store Register Dual (immediate) calculates an address from a base register value and an immediate offset, and |
| 10301 | // stores two words from two registers to memory. It can use offset, post-indexed, or pre-indexed addressing. |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10302 | bool |
| 10303 | EmulateInstructionARM::EmulateSTRDImm (const uint32_t opcode, const ARMEncoding encoding) |
| 10304 | { |
| 10305 | #if 0 |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10306 | if ConditionPassed() then |
| 10307 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 10308 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 10309 | address = if index then offset_addr else R[n]; |
| 10310 | MemA[address,4] = R[t]; |
| 10311 | MemA[address+4,4] = R[t2]; |
| 10312 | if wback then R[n] = offset_addr; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10313 | #endif |
| 10314 | |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10315 | bool success = false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10316 | |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10317 | if (ConditionPassed(opcode)) |
| 10318 | { |
| 10319 | uint32_t t; |
| 10320 | uint32_t t2; |
| 10321 | uint32_t n; |
| 10322 | uint32_t imm32; |
| 10323 | bool index; |
| 10324 | bool add; |
| 10325 | bool wback; |
| 10326 | |
| 10327 | switch (encoding) |
| 10328 | { |
| 10329 | case eEncodingT1: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10330 | // if P == Ô0Õ && W == Ô0Õ then SEE ÒRelated encodingsÓ; |
| 10331 | // t = UInt(Rt); t2 = UInt(Rt2); n = UInt(Rn); imm32 = ZeroExtend(imm8:Õ00Õ, 32); |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10332 | t = Bits32 (opcode, 15, 12); |
| 10333 | t2 = Bits32 (opcode, 11, 8); |
| 10334 | n = Bits32 (opcode, 19, 16); |
| 10335 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 10336 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10337 | // index = (P == Ô1Õ); add = (U == Ô1Õ); wback = (W == Ô1Õ); |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10338 | index = BitIsSet (opcode, 24); |
| 10339 | add = BitIsSet (opcode, 23); |
| 10340 | wback = BitIsSet (opcode, 21); |
| 10341 | |
| 10342 | // if wback && (n == t || n == t2) then UNPREDICTABLE; |
| 10343 | if (wback && ((n == t) || (n == t2))) |
| 10344 | return false; |
| 10345 | |
| 10346 | // if n == 15 || BadReg(t) || BadReg(t2) then UNPREDICTABLE; |
| 10347 | if ((n == 15) || BadReg (t) || BadReg (t2)) |
| 10348 | return false; |
| 10349 | |
| 10350 | break; |
| 10351 | |
| 10352 | case eEncodingA1: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10353 | // if Rt<0> == Ô1Õ then UNPREDICTABLE; |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10354 | // t = UInt(Rt); t2 = t+1; n = UInt(Rn); imm32 = ZeroExtend(imm4H:imm4L, 32); |
| 10355 | t = Bits32 (opcode, 15, 12); |
| 10356 | if (BitIsSet (t, 0)) |
| 10357 | return false; |
| 10358 | |
| 10359 | t2 = t + 1; |
| 10360 | n = Bits32 (opcode, 19, 16); |
| 10361 | imm32 = (Bits32 (opcode, 11, 8) << 4) | Bits32 (opcode, 3, 0); |
| 10362 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10363 | // index = (P == Ô1Õ); add = (U == Ô1Õ); wback = (P == Ô0Õ) || (W == Ô1Õ); |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10364 | index = BitIsSet (opcode, 24); |
| 10365 | add = BitIsSet (opcode, 23); |
| 10366 | wback = BitIsClear (opcode, 24) || BitIsSet (opcode, 21); |
| 10367 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10368 | // if P == Ô0Õ && W == Ô1Õ then UNPREDICTABLE; |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10369 | if (BitIsClear (opcode, 24) && BitIsSet (opcode, 21)) |
| 10370 | return false; |
| 10371 | |
| 10372 | // if wback && (n == 15 || n == t || n == t2) then UNPREDICTABLE; |
| 10373 | if (wback && ((n == 15) || (n == t) || (n == t2))) |
| 10374 | return false; |
| 10375 | |
| 10376 | // if t2 == 15 then UNPREDICTABLE; |
| 10377 | if (t2 == 15) |
| 10378 | return false; |
| 10379 | |
| 10380 | break; |
| 10381 | |
| 10382 | default: |
| 10383 | return false; |
| 10384 | } |
| 10385 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 10386 | RegisterInfo base_reg; |
| 10387 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10388 | |
| 10389 | uint32_t Rn = ReadCoreReg (n, &success); |
| 10390 | if (!success) |
| 10391 | return false; |
| 10392 | |
| 10393 | //offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 10394 | addr_t offset_addr; |
| 10395 | if (add) |
| 10396 | offset_addr = Rn + imm32; |
| 10397 | else |
| 10398 | offset_addr = Rn - imm32; |
| 10399 | |
| 10400 | //address = if index then offset_addr else R[n]; |
| 10401 | addr_t address; |
| 10402 | if (index) |
| 10403 | address = offset_addr; |
| 10404 | else |
| 10405 | address = Rn; |
| 10406 | |
| 10407 | //MemA[address,4] = R[t]; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 10408 | RegisterInfo data_reg; |
| 10409 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + t, data_reg); |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10410 | |
| 10411 | uint32_t data = ReadCoreReg (t, &success); |
| 10412 | if (!success) |
| 10413 | return false; |
| 10414 | |
| 10415 | EmulateInstruction::Context context; |
| 10416 | context.type = eContextRegisterStore; |
| 10417 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 10418 | |
| 10419 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 10420 | |
| 10421 | if (!MemAWrite (context, address, data, addr_byte_size)) |
| 10422 | return false; |
| 10423 | |
| 10424 | //MemA[address+4,4] = R[t2]; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 10425 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + t2, data_reg); |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10426 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, (address + 4) - Rn); |
| 10427 | |
| 10428 | data = ReadCoreReg (t2, &success); |
| 10429 | if (!success) |
| 10430 | return false; |
| 10431 | |
| 10432 | if (!MemAWrite (context, address + 4, data, addr_byte_size)) |
| 10433 | return false; |
| 10434 | |
| 10435 | //if wback then R[n] = offset_addr; |
| 10436 | if (wback) |
| 10437 | { |
| 10438 | context.type = eContextAdjustBaseRegister; |
| 10439 | context.SetAddress (offset_addr); |
| 10440 | |
| 10441 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 10442 | return false; |
| 10443 | } |
| 10444 | } |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10445 | return true; |
| 10446 | } |
| 10447 | |
| 10448 | |
| 10449 | // A8.6.201 STRD (register) |
| 10450 | bool |
| 10451 | EmulateInstructionARM::EmulateSTRDReg (const uint32_t opcode, const ARMEncoding encoding) |
| 10452 | { |
| 10453 | #if 0 |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10454 | if ConditionPassed() then |
| 10455 | EncodingSpecificOperations(); |
| 10456 | offset_addr = if add then (R[n] + R[m]) else (R[n] - R[m]); |
| 10457 | address = if index then offset_addr else R[n]; |
| 10458 | MemA[address,4] = R[t]; |
| 10459 | MemA[address+4,4] = R[t2]; |
| 10460 | if wback then R[n] = offset_addr; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10461 | #endif |
| 10462 | |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10463 | bool success = false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10464 | |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10465 | if (ConditionPassed(opcode)) |
| 10466 | { |
| 10467 | uint32_t t; |
| 10468 | uint32_t t2; |
| 10469 | uint32_t n; |
| 10470 | uint32_t m; |
| 10471 | bool index; |
| 10472 | bool add; |
| 10473 | bool wback; |
| 10474 | |
| 10475 | switch (encoding) |
| 10476 | { |
| 10477 | case eEncodingA1: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10478 | // if Rt<0> == Ô1Õ then UNPREDICTABLE; |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10479 | // t = UInt(Rt); t2 = t+1; n = UInt(Rn); m = UInt(Rm); |
| 10480 | t = Bits32 (opcode, 15, 12); |
| 10481 | if (BitIsSet (t, 0)) |
| 10482 | return false; |
| 10483 | |
| 10484 | t2 = t+1; |
| 10485 | n = Bits32 (opcode, 19, 16); |
| 10486 | m = Bits32 (opcode, 3, 0); |
| 10487 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10488 | // index = (P == Ô1Õ); add = (U == Ô1Õ); wback = (P == Ô0Õ) || (W == Ô1Õ); |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10489 | index = BitIsSet (opcode, 24); |
| 10490 | add = BitIsSet (opcode, 23); |
| 10491 | wback = BitIsClear (opcode, 24) || BitIsSet (opcode, 21); |
| 10492 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10493 | // if P == Ô0Õ && W == Ô1Õ then UNPREDICTABLE; |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10494 | if (BitIsClear (opcode, 24) && BitIsSet (opcode, 21)) |
| 10495 | return false; |
| 10496 | |
| 10497 | // if t2 == 15 || m == 15 then UNPREDICTABLE; |
| 10498 | if ((t2 == 15) || (m == 15)) |
| 10499 | return false; |
| 10500 | |
| 10501 | // if wback && (n == 15 || n == t || n == t2) then UNPREDICTABLE; |
| 10502 | if (wback && ((n == 15) || (n == t) || (n == t2))) |
| 10503 | return false; |
| 10504 | |
| 10505 | // if ArchVersion() < 6 && wback && m == n then UNPREDICTABLE; |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10506 | if ((ArchVersion() < 6) && wback && (m == n)) |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10507 | return false; |
| 10508 | |
| 10509 | break; |
| 10510 | |
| 10511 | default: |
| 10512 | return false; |
| 10513 | } |
| 10514 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 10515 | RegisterInfo base_reg; |
| 10516 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
| 10517 | RegisterInfo offset_reg; |
| 10518 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + m, offset_reg); |
| 10519 | RegisterInfo data_reg; |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10520 | |
| 10521 | uint32_t Rn = ReadCoreReg (n, &success); |
| 10522 | if (!success) |
| 10523 | return false; |
| 10524 | |
| 10525 | uint32_t Rm = ReadCoreReg (m, &success); |
| 10526 | if (!success) |
| 10527 | return false; |
| 10528 | |
| 10529 | // offset_addr = if add then (R[n] + R[m]) else (R[n] - R[m]); |
| 10530 | addr_t offset_addr; |
| 10531 | if (add) |
| 10532 | offset_addr = Rn + Rm; |
| 10533 | else |
| 10534 | offset_addr = Rn - Rm; |
| 10535 | |
| 10536 | // address = if index then offset_addr else R[n]; |
| 10537 | addr_t address; |
| 10538 | if (index) |
| 10539 | address = offset_addr; |
| 10540 | else |
| 10541 | address = Rn; |
| 10542 | // MemA[address,4] = R[t]; |
| 10543 | uint32_t Rt = ReadCoreReg (t, &success); |
| 10544 | if (!success) |
| 10545 | return false; |
| 10546 | |
| 10547 | EmulateInstruction::Context context; |
| 10548 | context.type = eContextRegisterStore; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 10549 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + t, data_reg); |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10550 | context.SetRegisterToRegisterPlusIndirectOffset (base_reg, offset_reg, data_reg); |
| 10551 | |
| 10552 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 10553 | |
| 10554 | if (!MemAWrite (context, address, Rt, addr_byte_size)) |
| 10555 | return false; |
| 10556 | |
| 10557 | // MemA[address+4,4] = R[t2]; |
| 10558 | uint32_t Rt2 = ReadCoreReg (t2, &success); |
| 10559 | if (!success) |
| 10560 | return false; |
| 10561 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 10562 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + t2, data_reg); |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10563 | |
| 10564 | context.SetRegisterToRegisterPlusIndirectOffset (base_reg, offset_reg, data_reg); |
| 10565 | |
| 10566 | if (!MemAWrite (context, address + 4, Rt2, addr_byte_size)) |
| 10567 | return false; |
| 10568 | |
| 10569 | // if wback then R[n] = offset_addr; |
| 10570 | if (wback) |
| 10571 | { |
| 10572 | context.type = eContextAdjustBaseRegister; |
| 10573 | context.SetAddress (offset_addr); |
| 10574 | |
| 10575 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 10576 | return false; |
| 10577 | |
| 10578 | } |
| 10579 | } |
Greg Clayton | 24bc5d9 | 2011-03-30 18:16:51 +0000 | [diff] [blame] | 10580 | return true; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10581 | } |
| 10582 | |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10583 | // A8.6.319 VLDM |
| 10584 | // Vector Load Multiple loads multiple extension registers from consecutive memory locations using an address from |
| 10585 | // an ARM core register. |
| 10586 | bool |
| 10587 | EmulateInstructionARM::EmulateVLDM (const uint32_t opcode, const ARMEncoding encoding) |
| 10588 | { |
| 10589 | #if 0 |
| 10590 | if ConditionPassed() then |
| 10591 | EncodingSpecificOperations(); CheckVFPEnabled(TRUE); NullCheckIfThumbEE(n); |
| 10592 | address = if add then R[n] else R[n]-imm32; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 10593 | if wback then R[n] = if add then R[n]+imm32 else R[n]-imm32; |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10594 | for r = 0 to regs-1 |
| 10595 | if single_regs then |
| 10596 | S[d+r] = MemA[address,4]; address = address+4; |
| 10597 | else |
| 10598 | word1 = MemA[address,4]; word2 = MemA[address+4,4]; address = address+8; |
| 10599 | // Combine the word-aligned words in the correct order for current endianness. |
| 10600 | D[d+r] = if BigEndian() then word1:word2 else word2:word1; |
| 10601 | #endif |
| 10602 | |
| 10603 | bool success = false; |
| 10604 | |
| 10605 | if (ConditionPassed(opcode)) |
| 10606 | { |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10607 | bool single_regs; |
| 10608 | bool add; |
| 10609 | bool wback; |
| 10610 | uint32_t d; |
| 10611 | uint32_t n; |
| 10612 | uint32_t imm32; |
| 10613 | uint32_t regs; |
| 10614 | |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10615 | switch (encoding) |
| 10616 | { |
| 10617 | case eEncodingT1: |
| 10618 | case eEncodingA1: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10619 | // if P == Ô0Õ && U == Ô0Õ && W == Ô0Õ then SEE ÒRelated encodingsÓ; |
| 10620 | // if P == Ô0Õ && U == Ô1Õ && W == Ô1Õ && Rn == Ô1101Õ then SEE VPOP; |
| 10621 | // if P == Ô1Õ && W == Ô0Õ then SEE VLDR; |
| 10622 | // if P == U && W == Ô1Õ then UNDEFINED; |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10623 | if ((Bit32 (opcode, 24) == Bit32 (opcode, 23)) && BitIsSet (opcode, 21)) |
| 10624 | return false; |
| 10625 | |
| 10626 | // // Remaining combinations are PUW = 010 (IA without !), 011 (IA with !), 101 (DB with !) |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10627 | // single_regs = FALSE; add = (U == Ô1Õ); wback = (W == Ô1Õ); |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10628 | single_regs = false; |
| 10629 | add = BitIsSet (opcode, 23); |
| 10630 | wback = BitIsSet (opcode, 21); |
| 10631 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10632 | // d = UInt(D:Vd); n = UInt(Rn); imm32 = ZeroExtend(imm8:Õ00Õ, 32); |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10633 | d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12); |
| 10634 | n = Bits32 (opcode, 19, 16); |
| 10635 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 10636 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10637 | // regs = UInt(imm8) DIV 2; // If UInt(imm8) is odd, see ÒFLDMXÓ. |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10638 | regs = Bits32 (opcode, 7, 0) / 2; |
| 10639 | |
| 10640 | // if n == 15 && (wback || CurrentInstrSet() != InstrSet_ARM) then UNPREDICTABLE; |
| 10641 | if (n == 15 && (wback || CurrentInstrSet() != eModeARM)) |
| 10642 | return false; |
| 10643 | |
| 10644 | // if regs == 0 || regs > 16 || (d+regs) > 32 then UNPREDICTABLE; |
| 10645 | if ((regs == 0) || (regs > 16) || ((d + regs) > 32)) |
| 10646 | return false; |
| 10647 | |
| 10648 | break; |
| 10649 | |
| 10650 | case eEncodingT2: |
| 10651 | case eEncodingA2: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10652 | // if P == Ô0Õ && U == Ô0Õ && W == Ô0Õ then SEE ÒRelated encodingsÓ; |
| 10653 | // if P == Ô0Õ && U == Ô1Õ && W == Ô1Õ && Rn == Ô1101Õ then SEE VPOP; |
| 10654 | // if P == Ô1Õ && W == Ô0Õ then SEE VLDR; |
| 10655 | // if P == U && W == Ô1Õ then UNDEFINED; |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10656 | if ((Bit32 (opcode, 24) == Bit32 (opcode, 23)) && BitIsSet (opcode, 21)) |
| 10657 | return false; |
| 10658 | |
| 10659 | // // Remaining combinations are PUW = 010 (IA without !), 011 (IA with !), 101 (DB with !) |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10660 | // single_regs = TRUE; add = (U == Ô1Õ); wback = (W == Ô1Õ); d = UInt(Vd:D); n = UInt(Rn); |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10661 | single_regs = true; |
| 10662 | add = BitIsSet (opcode, 23); |
| 10663 | wback = BitIsSet (opcode, 21); |
| 10664 | d = (Bits32 (opcode, 15, 12) << 1) | Bit32 (opcode, 22); |
| 10665 | n = Bits32 (opcode, 19, 16); |
| 10666 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10667 | // imm32 = ZeroExtend(imm8:Õ00Õ, 32); regs = UInt(imm8); |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10668 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 10669 | regs = Bits32 (opcode, 7, 0); |
| 10670 | |
| 10671 | // if n == 15 && (wback || CurrentInstrSet() != InstrSet_ARM) then UNPREDICTABLE; |
| 10672 | if ((n == 15) && (wback || (CurrentInstrSet() != eModeARM))) |
| 10673 | return false; |
| 10674 | |
| 10675 | // if regs == 0 || (d+regs) > 32 then UNPREDICTABLE; |
| 10676 | if ((regs == 0) || ((d + regs) > 32)) |
| 10677 | return false; |
| 10678 | break; |
| 10679 | |
| 10680 | default: |
| 10681 | return false; |
| 10682 | } |
| 10683 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 10684 | RegisterInfo base_reg; |
| 10685 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10686 | |
| 10687 | uint32_t Rn = ReadCoreReg (n, &success); |
| 10688 | if (!success) |
| 10689 | return false; |
| 10690 | |
| 10691 | // address = if add then R[n] else R[n]-imm32; |
| 10692 | addr_t address; |
| 10693 | if (add) |
| 10694 | address = Rn; |
| 10695 | else |
| 10696 | address = Rn - imm32; |
| 10697 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 10698 | // if wback then R[n] = if add then R[n]+imm32 else R[n]-imm32; |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10699 | EmulateInstruction::Context context; |
| 10700 | |
| 10701 | if (wback) |
| 10702 | { |
| 10703 | uint32_t value; |
| 10704 | if (add) |
| 10705 | value = Rn + imm32; |
| 10706 | else |
| 10707 | value = Rn - imm32; |
| 10708 | |
| 10709 | context.type = eContextAdjustBaseRegister; |
| 10710 | context.SetImmediateSigned (value - Rn); |
| 10711 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, value)) |
| 10712 | return false; |
| 10713 | |
| 10714 | } |
| 10715 | |
| 10716 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 10717 | uint32_t start_reg = single_regs ? dwarf_s0 : dwarf_d0; |
| 10718 | |
| 10719 | context.type = eContextRegisterLoad; |
| 10720 | |
| 10721 | // for r = 0 to regs-1 |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10722 | for (uint32_t r = 0; r < regs; ++r) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10723 | { |
| 10724 | if (single_regs) |
| 10725 | { |
| 10726 | // S[d+r] = MemA[address,4]; address = address+4; |
| 10727 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 10728 | |
| 10729 | uint32_t data = MemARead (context, address, addr_byte_size, 0, &success); |
| 10730 | if (!success) |
| 10731 | return false; |
| 10732 | |
| 10733 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, start_reg + d + r, data)) |
| 10734 | return false; |
| 10735 | |
| 10736 | address = address + 4; |
| 10737 | } |
| 10738 | else |
| 10739 | { |
| 10740 | // word1 = MemA[address,4]; word2 = MemA[address+4,4]; address = address+8; |
| 10741 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 10742 | uint32_t word1 = MemARead (context, address, addr_byte_size, 0, &success); |
| 10743 | if (!success) |
| 10744 | return false; |
| 10745 | |
| 10746 | context.SetRegisterPlusOffset (base_reg, (address + 4) - Rn); |
| 10747 | uint32_t word2 = MemARead (context, address + 4, addr_byte_size, 0, &success); |
| 10748 | if (!success) |
| 10749 | return false; |
| 10750 | |
| 10751 | address = address + 8; |
| 10752 | // // Combine the word-aligned words in the correct order for current endianness. |
| 10753 | // D[d+r] = if BigEndian() then word1:word2 else word2:word1; |
| 10754 | uint64_t data; |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 10755 | if (GetByteOrder() == eByteOrderBig) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10756 | { |
| 10757 | data = word1; |
| 10758 | data = (data << 32) | word2; |
| 10759 | } |
| 10760 | else |
| 10761 | { |
| 10762 | data = word2; |
| 10763 | data = (data << 32) | word1; |
| 10764 | } |
| 10765 | |
| 10766 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, start_reg + d + r, data)) |
| 10767 | return false; |
| 10768 | } |
| 10769 | } |
| 10770 | } |
| 10771 | return true; |
| 10772 | } |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10773 | |
| 10774 | // A8.6.399 VSTM |
Caroline Tice | 917ad35 | 2011-03-31 05:05:30 +0000 | [diff] [blame] | 10775 | // Vector Store Multiple stores multiple extension registers to consecutive memory locations using an address from an |
| 10776 | // ARM core register. |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10777 | bool |
| 10778 | EmulateInstructionARM::EmulateVSTM (const uint32_t opcode, const ARMEncoding encoding) |
| 10779 | { |
| 10780 | #if 0 |
| 10781 | if ConditionPassed() then |
| 10782 | EncodingSpecificOperations(); CheckVFPEnabled(TRUE); NullCheckIfThumbEE(n); |
| 10783 | address = if add then R[n] else R[n]-imm32; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 10784 | if wback then R[n] = if add then R[n]+imm32 else R[n]-imm32; |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10785 | for r = 0 to regs-1 |
| 10786 | if single_regs then |
| 10787 | MemA[address,4] = S[d+r]; address = address+4; |
| 10788 | else |
| 10789 | // Store as two word-aligned words in the correct order for current endianness. |
| 10790 | MemA[address,4] = if BigEndian() then D[d+r]<63:32> else D[d+r]<31:0>; |
| 10791 | MemA[address+4,4] = if BigEndian() then D[d+r]<31:0> else D[d+r]<63:32>; |
| 10792 | address = address+8; |
| 10793 | #endif |
| 10794 | |
| 10795 | bool success = false; |
| 10796 | |
| 10797 | if (ConditionPassed (opcode)) |
| 10798 | { |
| 10799 | bool single_regs; |
| 10800 | bool add; |
| 10801 | bool wback; |
| 10802 | uint32_t d; |
| 10803 | uint32_t n; |
| 10804 | uint32_t imm32; |
| 10805 | uint32_t regs; |
| 10806 | |
| 10807 | switch (encoding) |
| 10808 | { |
| 10809 | case eEncodingT1: |
| 10810 | case eEncodingA1: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10811 | // if P == Ô0Õ && U == Ô0Õ && W == Ô0Õ then SEE ÒRelated encodingsÓ; |
| 10812 | // if P == Ô1Õ && U == Ô0Õ && W == Ô1Õ && Rn == Ô1101Õ then SEE VPUSH; |
| 10813 | // if P == Ô1Õ && W == Ô0Õ then SEE VSTR; |
| 10814 | // if P == U && W == Ô1Õ then UNDEFINED; |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10815 | if ((Bit32 (opcode, 24) == Bit32 (opcode, 23)) && BitIsSet (opcode, 21)) |
| 10816 | return false; |
| 10817 | |
| 10818 | // // Remaining combinations are PUW = 010 (IA without !), 011 (IA with !), 101 (DB with !) |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10819 | // single_regs = FALSE; add = (U == Ô1Õ); wback = (W == Ô1Õ); |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10820 | single_regs = false; |
| 10821 | add = BitIsSet (opcode, 23); |
| 10822 | wback = BitIsSet (opcode, 21); |
| 10823 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10824 | // d = UInt(D:Vd); n = UInt(Rn); imm32 = ZeroExtend(imm8:Õ00Õ, 32); |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10825 | d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12); |
| 10826 | n = Bits32 (opcode, 19, 16); |
| 10827 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 10828 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10829 | // regs = UInt(imm8) DIV 2; // If UInt(imm8) is odd, see ÒFSTMXÓ. |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10830 | regs = Bits32 (opcode, 7, 0) / 2; |
| 10831 | |
| 10832 | // if n == 15 && (wback || CurrentInstrSet() != InstrSet_ARM) then UNPREDICTABLE; |
| 10833 | if ((n == 15) && (wback || (CurrentInstrSet() != eModeARM))) |
| 10834 | return false; |
| 10835 | |
| 10836 | // if regs == 0 || regs > 16 || (d+regs) > 32 then UNPREDICTABLE; |
| 10837 | if ((regs == 0) || (regs > 16) || ((d + regs) > 32)) |
| 10838 | return false; |
| 10839 | |
| 10840 | break; |
| 10841 | |
| 10842 | case eEncodingT2: |
| 10843 | case eEncodingA2: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10844 | // if P == Ô0Õ && U == Ô0Õ && W == Ô0Õ then SEE ÒRelated encodingsÓ; |
| 10845 | // if P == Ô1Õ && U == Ô0Õ && W == Ô1Õ && Rn == Ô1101Õ then SEE VPUSH; |
| 10846 | // if P == Ô1Õ && W == Ô0Õ then SEE VSTR; |
| 10847 | // if P == U && W == Ô1Õ then UNDEFINED; |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10848 | if ((Bit32 (opcode, 24) == Bit32 (opcode, 23)) && BitIsSet (opcode, 21)) |
| 10849 | return false; |
| 10850 | |
| 10851 | // // Remaining combinations are PUW = 010 (IA without !), 011 (IA with !), 101 (DB with !) |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10852 | // single_regs = TRUE; add = (U == Ô1Õ); wback = (W == Ô1Õ); d = UInt(Vd:D); n = UInt(Rn); |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10853 | single_regs = true; |
| 10854 | add = BitIsSet (opcode, 23); |
| 10855 | wback = BitIsSet (opcode, 21); |
| 10856 | d = (Bits32 (opcode, 15, 12) << 1) | Bit32 (opcode, 22); |
| 10857 | n = Bits32 (opcode, 19, 16); |
| 10858 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 10859 | // imm32 = ZeroExtend(imm8:Õ00Õ, 32); regs = UInt(imm8); |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10860 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 10861 | regs = Bits32 (opcode, 7, 0); |
| 10862 | |
| 10863 | // if n == 15 && (wback || CurrentInstrSet() != InstrSet_ARM) then UNPREDICTABLE; |
| 10864 | if ((n == 15) && (wback || (CurrentInstrSet () != eModeARM))) |
| 10865 | return false; |
| 10866 | |
| 10867 | // if regs == 0 || (d+regs) > 32 then UNPREDICTABLE; |
| 10868 | if ((regs == 0) || ((d + regs) > 32)) |
| 10869 | return false; |
| 10870 | |
| 10871 | break; |
| 10872 | |
| 10873 | default: |
| 10874 | return false; |
| 10875 | } |
| 10876 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 10877 | RegisterInfo base_reg; |
| 10878 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10879 | |
| 10880 | uint32_t Rn = ReadCoreReg (n, &success); |
| 10881 | if (!success) |
| 10882 | return false; |
| 10883 | |
| 10884 | // address = if add then R[n] else R[n]-imm32; |
| 10885 | addr_t address; |
| 10886 | if (add) |
| 10887 | address = Rn; |
| 10888 | else |
| 10889 | address = Rn - imm32; |
| 10890 | |
| 10891 | EmulateInstruction::Context context; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 10892 | // if wback then R[n] = if add then R[n]+imm32 else R[n]-imm32; |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10893 | if (wback) |
| 10894 | { |
| 10895 | uint32_t value; |
| 10896 | if (add) |
| 10897 | value = Rn + imm32; |
| 10898 | else |
| 10899 | value = Rn - imm32; |
| 10900 | |
| 10901 | context.type = eContextAdjustBaseRegister; |
| 10902 | context.SetRegisterPlusOffset (base_reg, value - Rn); |
| 10903 | |
| 10904 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, value)) |
| 10905 | return false; |
| 10906 | } |
| 10907 | |
| 10908 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 10909 | uint32_t start_reg = single_regs ? dwarf_s0 : dwarf_d0; |
| 10910 | |
| 10911 | context.type = eContextRegisterStore; |
| 10912 | // for r = 0 to regs-1 |
| 10913 | for (int r = 0; r < regs; ++r) |
| 10914 | { |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 10915 | |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10916 | if (single_regs) |
| 10917 | { |
| 10918 | // MemA[address,4] = S[d+r]; address = address+4; |
| 10919 | uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, start_reg + d + r, 0, &success); |
| 10920 | if (!success) |
| 10921 | return false; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 10922 | |
| 10923 | RegisterInfo data_reg; |
| 10924 | GetRegisterInfo (eRegisterKindDWARF, start_reg + d + r, data_reg); |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10925 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 10926 | if (!MemAWrite (context, address, data, addr_byte_size)) |
| 10927 | return false; |
| 10928 | |
| 10929 | address = address + 4; |
| 10930 | } |
| 10931 | else |
| 10932 | { |
| 10933 | // // Store as two word-aligned words in the correct order for current endianness. |
| 10934 | // MemA[address,4] = if BigEndian() then D[d+r]<63:32> else D[d+r]<31:0>; |
| 10935 | // MemA[address+4,4] = if BigEndian() then D[d+r]<31:0> else D[d+r]<63:32>; |
| 10936 | uint64_t data = ReadRegisterUnsigned (eRegisterKindDWARF, start_reg + d + r, 0, &success); |
| 10937 | if (!success) |
| 10938 | return false; |
| 10939 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 10940 | RegisterInfo data_reg; |
| 10941 | GetRegisterInfo (eRegisterKindDWARF, start_reg + d + r, data_reg); |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10942 | |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 10943 | if (GetByteOrder() == eByteOrderBig) |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10944 | { |
| 10945 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 10946 | if (!MemAWrite (context, address, Bits64 (data, 63, 32), addr_byte_size)) |
| 10947 | return false; |
| 10948 | |
| 10949 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, (address + 4) - Rn); |
| 10950 | if (!MemAWrite (context, address+ 4, Bits64 (data, 31, 0), addr_byte_size)) |
| 10951 | return false; |
| 10952 | } |
| 10953 | else |
| 10954 | { |
| 10955 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 10956 | if (!MemAWrite (context, address, Bits64 (data, 31, 0), addr_byte_size)) |
| 10957 | return false; |
| 10958 | |
| 10959 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, (address + 4) - Rn); |
| 10960 | if (!MemAWrite (context, address + 4, Bits64 (data, 63, 32), addr_byte_size)) |
| 10961 | return false; |
| 10962 | } |
| 10963 | // address = address+8; |
| 10964 | address = address + 8; |
| 10965 | } |
| 10966 | } |
| 10967 | } |
| 10968 | return true; |
| 10969 | } |
| 10970 | |
Caroline Tice | 917ad35 | 2011-03-31 05:05:30 +0000 | [diff] [blame] | 10971 | // A8.6.320 |
| 10972 | // This instruciton loads a single extension register fronm memory, using an address from an ARM core register, with |
| 10973 | // an optional offset. |
| 10974 | bool |
| 10975 | EmulateInstructionARM::EmulateVLDR (const uint32_t opcode, ARMEncoding encoding) |
| 10976 | { |
| 10977 | #if 0 |
| 10978 | if ConditionPassed() then |
| 10979 | EncodingSpecificOperations(); CheckVFPEnabled(TRUE); NullCheckIfThumbEE(n); |
| 10980 | base = if n == 15 then Align(PC,4) else R[n]; |
| 10981 | address = if add then (base + imm32) else (base - imm32); |
| 10982 | if single_reg then |
| 10983 | S[d] = MemA[address,4]; |
| 10984 | else |
| 10985 | word1 = MemA[address,4]; word2 = MemA[address+4,4]; |
| 10986 | // Combine the word-aligned words in the correct order for current endianness. |
| 10987 | D[d] = if BigEndian() then word1:word2 else word2:word1; |
| 10988 | #endif |
| 10989 | |
| 10990 | bool success = false; |
| 10991 | |
| 10992 | if (ConditionPassed (opcode)) |
| 10993 | { |
| 10994 | bool single_reg; |
| 10995 | bool add; |
| 10996 | uint32_t imm32; |
| 10997 | uint32_t d; |
| 10998 | uint32_t n; |
| 10999 | |
| 11000 | switch (encoding) |
| 11001 | { |
| 11002 | case eEncodingT1: |
| 11003 | case eEncodingA1: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11004 | // single_reg = FALSE; add = (U == Ô1Õ); imm32 = ZeroExtend(imm8:Õ00Õ, 32); |
Caroline Tice | 917ad35 | 2011-03-31 05:05:30 +0000 | [diff] [blame] | 11005 | single_reg = false; |
| 11006 | add = BitIsSet (opcode, 23); |
| 11007 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 11008 | |
| 11009 | // d = UInt(D:Vd); n = UInt(Rn); |
| 11010 | d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12); |
| 11011 | n = Bits32 (opcode, 19, 16); |
| 11012 | |
| 11013 | break; |
| 11014 | |
| 11015 | case eEncodingT2: |
| 11016 | case eEncodingA2: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11017 | // single_reg = TRUE; add = (U == Ô1Õ); imm32 = ZeroExtend(imm8:Õ00Õ, 32); |
Caroline Tice | 917ad35 | 2011-03-31 05:05:30 +0000 | [diff] [blame] | 11018 | single_reg = true; |
| 11019 | add = BitIsSet (opcode, 23); |
| 11020 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 11021 | |
| 11022 | // d = UInt(Vd:D); n = UInt(Rn); |
| 11023 | d = (Bits32 (opcode, 15, 12) << 1) | Bit32 (opcode, 22); |
| 11024 | n = Bits32 (opcode, 19, 16); |
| 11025 | |
| 11026 | break; |
| 11027 | |
| 11028 | default: |
| 11029 | return false; |
| 11030 | } |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 11031 | RegisterInfo base_reg; |
| 11032 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | 917ad35 | 2011-03-31 05:05:30 +0000 | [diff] [blame] | 11033 | |
| 11034 | uint32_t Rn = ReadCoreReg (n, &success); |
| 11035 | if (!success) |
| 11036 | return false; |
| 11037 | |
| 11038 | // base = if n == 15 then Align(PC,4) else R[n]; |
| 11039 | uint32_t base; |
| 11040 | if (n == 15) |
| 11041 | base = AlignPC (Rn); |
| 11042 | else |
| 11043 | base = Rn; |
| 11044 | |
| 11045 | // address = if add then (base + imm32) else (base - imm32); |
| 11046 | addr_t address; |
| 11047 | if (add) |
| 11048 | address = base + imm32; |
| 11049 | else |
| 11050 | address = base - imm32; |
| 11051 | |
| 11052 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 11053 | uint32_t start_reg = single_reg ? dwarf_s0 : dwarf_d0; |
| 11054 | |
| 11055 | EmulateInstruction::Context context; |
| 11056 | context.type = eContextRegisterLoad; |
| 11057 | context.SetRegisterPlusOffset (base_reg, address - base); |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 11058 | |
Caroline Tice | 917ad35 | 2011-03-31 05:05:30 +0000 | [diff] [blame] | 11059 | if (single_reg) |
| 11060 | { |
| 11061 | // S[d] = MemA[address,4]; |
| 11062 | uint32_t data = MemARead (context, address, addr_byte_size, 0, &success); |
| 11063 | if (!success) |
| 11064 | return false; |
| 11065 | |
| 11066 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, start_reg + d, data)) |
| 11067 | return false; |
| 11068 | } |
| 11069 | else |
| 11070 | { |
| 11071 | // word1 = MemA[address,4]; word2 = MemA[address+4,4]; |
| 11072 | uint32_t word1 = MemARead (context, address, addr_byte_size, 0, &success); |
| 11073 | if (!success) |
| 11074 | return false; |
| 11075 | |
| 11076 | context.SetRegisterPlusOffset (base_reg, (address + 4) - base); |
| 11077 | uint32_t word2 = MemARead (context, address + 4, addr_byte_size, 0, &success); |
| 11078 | if (!success) |
| 11079 | return false; |
| 11080 | // // Combine the word-aligned words in the correct order for current endianness. |
| 11081 | // D[d] = if BigEndian() then word1:word2 else word2:word1; |
| 11082 | uint64_t data64; |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 11083 | if (GetByteOrder() == eByteOrderBig) |
Caroline Tice | 917ad35 | 2011-03-31 05:05:30 +0000 | [diff] [blame] | 11084 | { |
| 11085 | data64 = word1; |
| 11086 | data64 = (data64 << 32) | word2; |
| 11087 | } |
| 11088 | else |
| 11089 | { |
| 11090 | data64 = word2; |
| 11091 | data64 = (data64 << 32) | word1; |
| 11092 | } |
| 11093 | |
| 11094 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, start_reg + d, data64)) |
| 11095 | return false; |
| 11096 | } |
| 11097 | } |
| 11098 | return true; |
| 11099 | } |
Caroline Tice | 424652f | 2011-03-31 05:38:36 +0000 | [diff] [blame] | 11100 | |
| 11101 | // A8.6.400 VSTR |
| 11102 | // This instruction stores a signle extension register to memory, using an address from an ARM core register, with an |
| 11103 | // optional offset. |
| 11104 | bool |
| 11105 | EmulateInstructionARM::EmulateVSTR (const uint32_t opcode, ARMEncoding encoding) |
| 11106 | { |
| 11107 | #if 0 |
| 11108 | if ConditionPassed() then |
| 11109 | EncodingSpecificOperations(); CheckVFPEnabled(TRUE); NullCheckIfThumbEE(n); |
| 11110 | address = if add then (R[n] + imm32) else (R[n] - imm32); |
| 11111 | if single_reg then |
| 11112 | MemA[address,4] = S[d]; |
| 11113 | else |
| 11114 | // Store as two word-aligned words in the correct order for current endianness. |
| 11115 | MemA[address,4] = if BigEndian() then D[d]<63:32> else D[d]<31:0>; |
| 11116 | MemA[address+4,4] = if BigEndian() then D[d]<31:0> else D[d]<63:32>; |
| 11117 | #endif |
| 11118 | |
| 11119 | bool success = false; |
| 11120 | |
| 11121 | if (ConditionPassed (opcode)) |
| 11122 | { |
| 11123 | bool single_reg; |
| 11124 | bool add; |
| 11125 | uint32_t imm32; |
| 11126 | uint32_t d; |
| 11127 | uint32_t n; |
| 11128 | |
| 11129 | switch (encoding) |
| 11130 | { |
| 11131 | case eEncodingT1: |
| 11132 | case eEncodingA1: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11133 | // single_reg = FALSE; add = (U == Ô1Õ); imm32 = ZeroExtend(imm8:Õ00Õ, 32); |
Caroline Tice | 424652f | 2011-03-31 05:38:36 +0000 | [diff] [blame] | 11134 | single_reg = false; |
| 11135 | add = BitIsSet (opcode, 23); |
| 11136 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 11137 | |
| 11138 | // d = UInt(D:Vd); n = UInt(Rn); |
| 11139 | d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12); |
| 11140 | n = Bits32 (opcode, 19, 16); |
| 11141 | |
| 11142 | // if n == 15 && CurrentInstrSet() != InstrSet_ARM then UNPREDICTABLE; |
| 11143 | if ((n == 15) && (CurrentInstrSet() != eModeARM)) |
| 11144 | return false; |
| 11145 | |
| 11146 | break; |
| 11147 | |
| 11148 | case eEncodingT2: |
| 11149 | case eEncodingA2: |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11150 | // single_reg = TRUE; add = (U == Ô1Õ); imm32 = ZeroExtend(imm8:Õ00Õ, 32); |
Caroline Tice | 424652f | 2011-03-31 05:38:36 +0000 | [diff] [blame] | 11151 | single_reg = true; |
| 11152 | add = BitIsSet (opcode, 23); |
| 11153 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 11154 | |
| 11155 | // d = UInt(Vd:D); n = UInt(Rn); |
| 11156 | d = (Bits32 (opcode, 15, 12) << 1) | Bit32 (opcode, 22); |
| 11157 | n = Bits32 (opcode, 19, 16); |
| 11158 | |
| 11159 | // if n == 15 && CurrentInstrSet() != InstrSet_ARM then UNPREDICTABLE; |
| 11160 | if ((n == 15) && (CurrentInstrSet() != eModeARM)) |
| 11161 | return false; |
| 11162 | |
| 11163 | break; |
| 11164 | |
| 11165 | default: |
| 11166 | return false; |
| 11167 | } |
| 11168 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 11169 | RegisterInfo base_reg; |
| 11170 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | 424652f | 2011-03-31 05:38:36 +0000 | [diff] [blame] | 11171 | |
| 11172 | uint32_t Rn = ReadCoreReg (n, &success); |
| 11173 | if (!success) |
| 11174 | return false; |
| 11175 | |
| 11176 | // address = if add then (R[n] + imm32) else (R[n] - imm32); |
| 11177 | addr_t address; |
| 11178 | if (add) |
| 11179 | address = Rn + imm32; |
| 11180 | else |
| 11181 | address = Rn - imm32; |
| 11182 | |
| 11183 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 11184 | uint32_t start_reg = single_reg ? dwarf_s0 : dwarf_d0; |
| 11185 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 11186 | RegisterInfo data_reg; |
| 11187 | GetRegisterInfo (eRegisterKindDWARF, start_reg + d, data_reg); |
Caroline Tice | 424652f | 2011-03-31 05:38:36 +0000 | [diff] [blame] | 11188 | EmulateInstruction::Context context; |
| 11189 | context.type = eContextRegisterStore; |
| 11190 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 11191 | |
| 11192 | if (single_reg) |
| 11193 | { |
| 11194 | // MemA[address,4] = S[d]; |
| 11195 | uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, start_reg + d, 0, &success); |
| 11196 | if (!success) |
| 11197 | return false; |
| 11198 | |
| 11199 | if (!MemAWrite (context, address, data, addr_byte_size)) |
| 11200 | return false; |
| 11201 | } |
| 11202 | else |
| 11203 | { |
| 11204 | // // Store as two word-aligned words in the correct order for current endianness. |
| 11205 | // MemA[address,4] = if BigEndian() then D[d]<63:32> else D[d]<31:0>; |
| 11206 | // MemA[address+4,4] = if BigEndian() then D[d]<31:0> else D[d]<63:32>; |
| 11207 | uint64_t data = ReadRegisterUnsigned (eRegisterKindDWARF, start_reg + d, 0, &success); |
| 11208 | if (!success) |
| 11209 | return false; |
| 11210 | |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 11211 | if (GetByteOrder() == eByteOrderBig) |
Caroline Tice | 424652f | 2011-03-31 05:38:36 +0000 | [diff] [blame] | 11212 | { |
| 11213 | if (!MemAWrite (context, address, Bits64 (data, 63, 32), addr_byte_size)) |
| 11214 | return false; |
| 11215 | |
| 11216 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, (address + 4) - Rn); |
| 11217 | if (!MemAWrite (context, address + 4, Bits64 (data, 31, 0), addr_byte_size)) |
| 11218 | return false; |
| 11219 | } |
| 11220 | else |
| 11221 | { |
| 11222 | if (!MemAWrite (context, address, Bits64 (data, 31, 0), addr_byte_size)) |
| 11223 | return false; |
| 11224 | |
| 11225 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, (address + 4) - Rn); |
| 11226 | if (!MemAWrite (context, address + 4, Bits64 (data, 63, 32), addr_byte_size)) |
| 11227 | return false; |
| 11228 | } |
| 11229 | } |
| 11230 | } |
| 11231 | return true; |
| 11232 | } |
Caroline Tice | 9121b35 | 2011-03-31 16:41:19 +0000 | [diff] [blame] | 11233 | |
| 11234 | // A8.6.307 VLDI1 (multiple single elements) |
| 11235 | // This instruction loads elements from memory into one, two, three or four registers, without de-interleaving. Every |
| 11236 | // element of each register is loaded. |
| 11237 | bool |
| 11238 | EmulateInstructionARM::EmulateVLD1Multiple (const uint32_t opcode, ARMEncoding encoding) |
| 11239 | { |
| 11240 | #if 0 |
| 11241 | if ConditionPassed() then |
| 11242 | EncodingSpecificOperations(); CheckAdvSIMDEnabled(); NullCheckIfThumbEE(n); |
| 11243 | address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11244 | if wback then R[n] = R[n] + (if register_index then R[m] else 8*regs); |
| 11245 | for r = 0 to regs-1 |
| 11246 | for e = 0 to elements-1 |
| 11247 | Elem[D[d+r],e,esize] = MemU[address,ebytes]; |
| 11248 | address = address + ebytes; |
| 11249 | #endif |
| 11250 | |
| 11251 | bool success = false; |
| 11252 | |
| 11253 | if (ConditionPassed (opcode)) |
| 11254 | { |
| 11255 | uint32_t regs; |
| 11256 | uint32_t alignment; |
| 11257 | uint32_t ebytes; |
| 11258 | uint32_t esize; |
| 11259 | uint32_t elements; |
| 11260 | uint32_t d; |
| 11261 | uint32_t n; |
| 11262 | uint32_t m; |
| 11263 | bool wback; |
| 11264 | bool register_index; |
| 11265 | |
| 11266 | switch (encoding) |
| 11267 | { |
| 11268 | case eEncodingT1: |
| 11269 | case eEncodingA1: |
| 11270 | { |
| 11271 | // case type of |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11272 | // when Ô0111Õ |
| 11273 | // regs = 1; if align<1> == Ô1Õ then UNDEFINED; |
| 11274 | // when Ô1010Õ |
| 11275 | // regs = 2; if align == Ô11Õ then UNDEFINED; |
| 11276 | // when Ô0110Õ |
| 11277 | // regs = 3; if align<1> == Ô1Õ then UNDEFINED; |
| 11278 | // when Ô0010Õ |
Caroline Tice | 9121b35 | 2011-03-31 16:41:19 +0000 | [diff] [blame] | 11279 | // regs = 4; |
| 11280 | // otherwise |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11281 | // SEE ÒRelated encodingsÓ; |
Caroline Tice | 9121b35 | 2011-03-31 16:41:19 +0000 | [diff] [blame] | 11282 | uint32_t type = Bits32 (opcode, 11, 8); |
| 11283 | uint32_t align = Bits32 (opcode, 5, 4); |
| 11284 | if (type == 7) // '0111' |
| 11285 | { |
| 11286 | regs = 1; |
| 11287 | if (BitIsSet (align, 1)) |
| 11288 | return false; |
| 11289 | } |
| 11290 | else if (type == 10) // '1010' |
| 11291 | { |
| 11292 | regs = 2; |
| 11293 | if (align == 3) |
| 11294 | return false; |
| 11295 | |
| 11296 | } |
| 11297 | else if (type == 6) // '0110' |
| 11298 | { |
| 11299 | regs = 3; |
| 11300 | if (BitIsSet (align, 1)) |
| 11301 | return false; |
| 11302 | } |
| 11303 | else if (type == 2) // '0010' |
| 11304 | { |
| 11305 | regs = 4; |
| 11306 | } |
| 11307 | else |
| 11308 | return false; |
| 11309 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11310 | // alignment = if align == Ô00Õ then 1 else 4 << UInt(align); |
Caroline Tice | 9121b35 | 2011-03-31 16:41:19 +0000 | [diff] [blame] | 11311 | if (align == 0) |
| 11312 | alignment = 1; |
| 11313 | else |
| 11314 | alignment = 4 << align; |
| 11315 | |
| 11316 | // ebytes = 1 << UInt(size); esize = 8 * ebytes; elements = 8 DIV ebytes; |
| 11317 | ebytes = 1 << Bits32 (opcode, 7, 6); |
| 11318 | esize = 8 * ebytes; |
| 11319 | elements = 8 / ebytes; |
| 11320 | |
| 11321 | // d = UInt(D:Vd); n = UInt(Rn); m = UInt(Rm); |
| 11322 | d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12); |
| 11323 | n = Bits32 (opcode, 19, 15); |
| 11324 | m = Bits32 (opcode, 3, 0); |
| 11325 | |
| 11326 | // wback = (m != 15); register_index = (m != 15 && m != 13); |
| 11327 | wback = (m != 15); |
| 11328 | register_index = ((m != 15) && (m != 13)); |
| 11329 | |
| 11330 | // if d+regs > 32 then UNPREDICTABLE; |
| 11331 | if ((d + regs) > 32) |
| 11332 | return false; |
| 11333 | } |
| 11334 | break; |
| 11335 | |
| 11336 | default: |
| 11337 | return false; |
| 11338 | } |
| 11339 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 11340 | RegisterInfo base_reg; |
| 11341 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | 9121b35 | 2011-03-31 16:41:19 +0000 | [diff] [blame] | 11342 | |
| 11343 | uint32_t Rn = ReadCoreReg (n, &success); |
| 11344 | if (!success) |
| 11345 | return false; |
| 11346 | |
| 11347 | // address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11348 | addr_t address = Rn; |
| 11349 | if ((address % alignment) != 0) |
| 11350 | return false; |
| 11351 | |
| 11352 | EmulateInstruction::Context context; |
| 11353 | // if wback then R[n] = R[n] + (if register_index then R[m] else 8*regs); |
| 11354 | if (wback) |
| 11355 | { |
| 11356 | uint32_t Rm = ReadCoreReg (m, &success); |
| 11357 | if (!success) |
| 11358 | return false; |
| 11359 | |
| 11360 | uint32_t offset; |
| 11361 | if (register_index) |
| 11362 | offset = Rm; |
| 11363 | else |
| 11364 | offset = 8 * regs; |
| 11365 | |
| 11366 | uint32_t value = Rn + offset; |
| 11367 | context.type = eContextAdjustBaseRegister; |
| 11368 | context.SetRegisterPlusOffset (base_reg, offset); |
| 11369 | |
| 11370 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, value)) |
| 11371 | return false; |
| 11372 | |
| 11373 | } |
| 11374 | |
| 11375 | // for r = 0 to regs-1 |
| 11376 | for (int r = 0; r < regs; ++r) |
| 11377 | { |
| 11378 | // for e = 0 to elements-1 |
| 11379 | uint64_t assembled_data = 0; |
| 11380 | for (int e = 0; e < elements; ++e) |
| 11381 | { |
| 11382 | // Elem[D[d+r],e,esize] = MemU[address,ebytes]; |
| 11383 | context.type = eContextRegisterLoad; |
| 11384 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 11385 | uint64_t data = MemURead (context, address, ebytes, 0, &success); |
| 11386 | if (!success) |
| 11387 | return false; |
| 11388 | |
| 11389 | assembled_data = (data << (e * esize)) | assembled_data; // New data goes to the left of existing data |
| 11390 | |
| 11391 | // address = address + ebytes; |
| 11392 | address = address + ebytes; |
| 11393 | } |
| 11394 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_d0 + d + r, assembled_data)) |
| 11395 | return false; |
| 11396 | } |
| 11397 | } |
| 11398 | return true; |
| 11399 | } |
| 11400 | |
Caroline Tice | b6281b1 | 2011-03-31 17:58:23 +0000 | [diff] [blame] | 11401 | // A8.6.308 VLD1 (single element to one lane) |
| 11402 | // |
| 11403 | bool |
| 11404 | EmulateInstructionARM::EmulateVLD1Single (const uint32_t opcode, const ARMEncoding encoding) |
| 11405 | { |
| 11406 | #if 0 |
| 11407 | if ConditionPassed() then |
| 11408 | EncodingSpecificOperations(); CheckAdvSIMDEnabled(); NullCheckIfThumbEE(n); |
| 11409 | address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11410 | if wback then R[n] = R[n] + (if register_index then R[m] else ebytes); |
| 11411 | Elem[D[d],index,esize] = MemU[address,ebytes]; |
| 11412 | #endif |
| 11413 | |
| 11414 | bool success = false; |
| 11415 | |
| 11416 | if (ConditionPassed (opcode)) |
| 11417 | { |
| 11418 | uint32_t ebytes; |
| 11419 | uint32_t esize; |
| 11420 | uint32_t index; |
| 11421 | uint32_t alignment; |
| 11422 | uint32_t d; |
| 11423 | uint32_t n; |
| 11424 | uint32_t m; |
| 11425 | bool wback; |
| 11426 | bool register_index; |
| 11427 | |
| 11428 | switch (encoding) |
| 11429 | { |
| 11430 | case eEncodingT1: |
| 11431 | case eEncodingA1: |
| 11432 | { |
| 11433 | uint32_t size = Bits32 (opcode, 11, 10); |
| 11434 | uint32_t index_align = Bits32 (opcode, 7, 4); |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11435 | // if size == Ô11Õ then SEE VLD1 (single element to all lanes); |
Caroline Tice | 8d24b4a | 2011-03-31 21:31:50 +0000 | [diff] [blame] | 11436 | if (size == 3) |
| 11437 | return EmulateVLD1SingleAll (opcode, encoding); |
Caroline Tice | b6281b1 | 2011-03-31 17:58:23 +0000 | [diff] [blame] | 11438 | // case size of |
| 11439 | if (size == 0) // when '00' |
| 11440 | { |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11441 | // if index_align<0> != Ô0Õ then UNDEFINED; |
Caroline Tice | b6281b1 | 2011-03-31 17:58:23 +0000 | [diff] [blame] | 11442 | if (BitIsClear (index_align, 0)) |
| 11443 | return false; |
| 11444 | |
| 11445 | // ebytes = 1; esize = 8; index = UInt(index_align<3:1>); alignment = 1; |
| 11446 | ebytes = 1; |
| 11447 | esize = 8; |
| 11448 | index = Bits32 (index_align, 3, 1); |
| 11449 | alignment = 1; |
| 11450 | } |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11451 | else if (size == 1) // when Ô01Õ |
Caroline Tice | b6281b1 | 2011-03-31 17:58:23 +0000 | [diff] [blame] | 11452 | { |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11453 | // if index_align<1> != Ô0Õ then UNDEFINED; |
Caroline Tice | b6281b1 | 2011-03-31 17:58:23 +0000 | [diff] [blame] | 11454 | if (BitIsClear (index_align, 1)) |
| 11455 | return false; |
| 11456 | |
| 11457 | // ebytes = 2; esize = 16; index = UInt(index_align<3:2>); |
| 11458 | ebytes = 2; |
| 11459 | esize = 16; |
| 11460 | index = Bits32 (index_align, 3, 2); |
| 11461 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11462 | // alignment = if index_align<0> == Ô0Õ then 1 else 2; |
Caroline Tice | b6281b1 | 2011-03-31 17:58:23 +0000 | [diff] [blame] | 11463 | if (BitIsClear (index_align, 0)) |
| 11464 | alignment = 1; |
| 11465 | else |
| 11466 | alignment = 2; |
| 11467 | } |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11468 | else if (size == 2) // when Ô10Õ |
Caroline Tice | b6281b1 | 2011-03-31 17:58:23 +0000 | [diff] [blame] | 11469 | { |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11470 | // if index_align<2> != Ô0Õ then UNDEFINED; |
Caroline Tice | b6281b1 | 2011-03-31 17:58:23 +0000 | [diff] [blame] | 11471 | if (BitIsClear (index_align, 2)) |
| 11472 | return false; |
| 11473 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11474 | // if index_align<1:0> != Ô00Õ && index_align<1:0> != Ô11Õ then UNDEFINED; |
Caroline Tice | b6281b1 | 2011-03-31 17:58:23 +0000 | [diff] [blame] | 11475 | if ((Bits32 (index_align, 1, 0) != 0) && (Bits32 (index_align, 1, 0) != 3)) |
| 11476 | return false; |
| 11477 | |
| 11478 | // ebytes = 4; esize = 32; index = UInt(index_align<3>); |
| 11479 | ebytes = 4; |
| 11480 | esize = 32; |
| 11481 | index = Bit32 (index_align, 3); |
| 11482 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11483 | // alignment = if index_align<1:0> == Ô00Õ then 1 else 4; |
Caroline Tice | b6281b1 | 2011-03-31 17:58:23 +0000 | [diff] [blame] | 11484 | if (Bits32 (index_align, 1, 0) == 0) |
| 11485 | alignment = 1; |
| 11486 | else |
| 11487 | alignment = 4; |
| 11488 | } |
| 11489 | // d = UInt(D:Vd); n = UInt(Rn); m = UInt(Rm); |
| 11490 | d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12); |
| 11491 | n = Bits32 (opcode, 19, 16); |
| 11492 | m = Bits32 (opcode, 3, 0); |
| 11493 | |
| 11494 | // wback = (m != 15); register_index = (m != 15 && m != 13); if n == 15 then UNPREDICTABLE; |
| 11495 | wback = (m != 15); |
| 11496 | register_index = ((m != 15) && (m != 13)); |
| 11497 | |
| 11498 | if (n == 15) |
| 11499 | return false; |
| 11500 | |
| 11501 | } |
| 11502 | break; |
| 11503 | |
| 11504 | default: |
| 11505 | return false; |
| 11506 | } |
| 11507 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 11508 | RegisterInfo base_reg; |
| 11509 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | b6281b1 | 2011-03-31 17:58:23 +0000 | [diff] [blame] | 11510 | |
| 11511 | uint32_t Rn = ReadCoreReg (n, &success); |
| 11512 | if (!success) |
| 11513 | return false; |
| 11514 | |
| 11515 | // address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11516 | addr_t address = Rn; |
| 11517 | if ((address % alignment) != 0) |
| 11518 | return false; |
| 11519 | |
| 11520 | EmulateInstruction::Context context; |
| 11521 | // if wback then R[n] = R[n] + (if register_index then R[m] else ebytes); |
| 11522 | if (wback) |
| 11523 | { |
| 11524 | uint32_t Rm = ReadCoreReg (m, &success); |
| 11525 | if (!success) |
| 11526 | return false; |
| 11527 | |
| 11528 | uint32_t offset; |
| 11529 | if (register_index) |
| 11530 | offset = Rm; |
| 11531 | else |
| 11532 | offset = ebytes; |
| 11533 | |
| 11534 | uint32_t value = Rn + offset; |
| 11535 | |
| 11536 | context.type = eContextAdjustBaseRegister; |
| 11537 | context.SetRegisterPlusOffset (base_reg, offset); |
| 11538 | |
| 11539 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, value)) |
| 11540 | return false; |
| 11541 | } |
| 11542 | |
| 11543 | // Elem[D[d],index,esize] = MemU[address,ebytes]; |
| 11544 | uint32_t element = MemURead (context, address, esize, 0, &success); |
| 11545 | if (!success) |
| 11546 | return false; |
| 11547 | |
| 11548 | element = element << (index * esize); |
| 11549 | |
| 11550 | uint64_t reg_data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_d0 + d, 0, &success); |
| 11551 | if (!success) |
| 11552 | return false; |
| 11553 | |
| 11554 | uint64_t all_ones = -1; |
| 11555 | uint64_t mask = all_ones << ((index+1) * esize); // mask is all 1's to left of where 'element' goes, & all 0's |
| 11556 | // at element & to the right of element. |
| 11557 | if (index > 0) |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 11558 | mask = mask | Bits64 (all_ones, (index * esize) - 1, 0); // add 1's to the right of where 'element' goes. |
Caroline Tice | b6281b1 | 2011-03-31 17:58:23 +0000 | [diff] [blame] | 11559 | // now mask should be 0's where element goes & 1's |
| 11560 | // everywhere else. |
| 11561 | |
| 11562 | uint64_t masked_reg = reg_data & mask; // Take original reg value & zero out 'element' bits |
| 11563 | reg_data = masked_reg & element; // Put 'element' into those bits in reg_data. |
| 11564 | |
| 11565 | context.type = eContextRegisterLoad; |
| 11566 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + d, reg_data)) |
| 11567 | return false; |
| 11568 | } |
| 11569 | return true; |
| 11570 | } |
| 11571 | |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 11572 | // A8.6.391 VST1 (multiple single elements) |
| 11573 | // Vector Store (multiple single elements) stores elements to memory from one, two, three, or four regsiters, without |
| 11574 | // interleaving. Every element of each register is stored. |
| 11575 | bool |
| 11576 | EmulateInstructionARM::EmulateVST1Multiple (const uint32_t opcode, ARMEncoding encoding) |
| 11577 | { |
| 11578 | #if 0 |
| 11579 | if ConditionPassed() then |
| 11580 | EncodingSpecificOperations(); CheckAdvSIMDEnabled(); NullCheckIfThumbEE(n); |
| 11581 | address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11582 | if wback then R[n] = R[n] + (if register_index then R[m] else 8*regs); |
| 11583 | for r = 0 to regs-1 |
| 11584 | for e = 0 to elements-1 |
| 11585 | MemU[address,ebytes] = Elem[D[d+r],e,esize]; |
| 11586 | address = address + ebytes; |
| 11587 | #endif |
| 11588 | |
| 11589 | bool success = false; |
| 11590 | |
| 11591 | if (ConditionPassed (opcode)) |
| 11592 | { |
| 11593 | uint32_t regs; |
| 11594 | uint32_t alignment; |
| 11595 | uint32_t ebytes; |
| 11596 | uint32_t esize; |
| 11597 | uint32_t elements; |
| 11598 | uint32_t d; |
| 11599 | uint32_t n; |
| 11600 | uint32_t m; |
| 11601 | bool wback; |
| 11602 | bool register_index; |
| 11603 | |
| 11604 | switch (encoding) |
| 11605 | { |
| 11606 | case eEncodingT1: |
| 11607 | case eEncodingA1: |
| 11608 | { |
| 11609 | uint32_t type = Bits32 (opcode, 11, 8); |
| 11610 | uint32_t align = Bits32 (opcode, 5, 4); |
| 11611 | |
| 11612 | // case type of |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11613 | if (type == 7) // when Ô0111Õ |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 11614 | { |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11615 | // regs = 1; if align<1> == Ô1Õ then UNDEFINED; |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 11616 | regs = 1; |
| 11617 | if (BitIsSet (align, 1)) |
| 11618 | return false; |
| 11619 | } |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11620 | else if (type == 10) // when Ô1010Õ |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 11621 | { |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11622 | // regs = 2; if align == Ô11Õ then UNDEFINED; |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 11623 | regs = 2; |
| 11624 | if (align == 3) |
| 11625 | return false; |
| 11626 | } |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11627 | else if (type == 6) // when Ô0110Õ |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 11628 | { |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11629 | // regs = 3; if align<1> == Ô1Õ then UNDEFINED; |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 11630 | regs = 3; |
| 11631 | if (BitIsSet (align, 1)) |
| 11632 | return false; |
| 11633 | } |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11634 | else if (type == 2) // when Ô0010Õ |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 11635 | // regs = 4; |
| 11636 | regs = 4; |
| 11637 | else // otherwise |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11638 | // SEE ÒRelated encodingsÓ; |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 11639 | return false; |
| 11640 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11641 | // alignment = if align == Ô00Õ then 1 else 4 << UInt(align); |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 11642 | if (align == 0) |
Johnny Chen | a1c7e46 | 2011-08-12 17:59:58 +0000 | [diff] [blame] | 11643 | alignment = 1; |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 11644 | else |
| 11645 | alignment = 4 << align; |
| 11646 | |
| 11647 | // ebytes = 1 << UInt(size); esize = 8 * ebytes; elements = 8 DIV ebytes; |
| 11648 | ebytes = 1 << Bits32 (opcode,7, 6); |
| 11649 | esize = 8 * ebytes; |
| 11650 | elements = 8 / ebytes; |
| 11651 | |
| 11652 | // d = UInt(D:Vd); n = UInt(Rn); m = UInt(Rm); |
| 11653 | d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12); |
| 11654 | n = Bits32 (opcode, 19, 16); |
| 11655 | m = Bits32 (opcode, 3, 0); |
| 11656 | |
| 11657 | // wback = (m != 15); register_index = (m != 15 && m != 13); |
| 11658 | wback = (m != 15); |
| 11659 | register_index = ((m != 15) && (m != 13)); |
| 11660 | |
| 11661 | // if d+regs > 32 then UNPREDICTABLE; if n == 15 then UNPREDICTABLE; |
| 11662 | if ((d + regs) > 32) |
| 11663 | return false; |
| 11664 | |
| 11665 | if (n == 15) |
| 11666 | return false; |
| 11667 | |
| 11668 | } |
| 11669 | break; |
| 11670 | |
| 11671 | default: |
| 11672 | return false; |
| 11673 | } |
| 11674 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 11675 | RegisterInfo base_reg; |
| 11676 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 11677 | |
| 11678 | uint32_t Rn = ReadCoreReg (n, &success); |
| 11679 | if (!success) |
| 11680 | return false; |
| 11681 | |
| 11682 | // address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11683 | addr_t address = Rn; |
| 11684 | if ((address % alignment) != 0) |
| 11685 | return false; |
| 11686 | |
| 11687 | EmulateInstruction::Context context; |
| 11688 | // if wback then R[n] = R[n] + (if register_index then R[m] else 8*regs); |
| 11689 | if (wback) |
| 11690 | { |
| 11691 | uint32_t Rm = ReadCoreReg (m, &success); |
| 11692 | if (!success) |
| 11693 | return false; |
| 11694 | |
| 11695 | uint32_t offset; |
| 11696 | if (register_index) |
| 11697 | offset = Rm; |
| 11698 | else |
| 11699 | offset = 8 * regs; |
| 11700 | |
| 11701 | context.type = eContextAdjustBaseRegister; |
| 11702 | context.SetRegisterPlusOffset (base_reg, offset); |
| 11703 | |
| 11704 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, Rn + offset)) |
| 11705 | return false; |
| 11706 | } |
| 11707 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 11708 | RegisterInfo data_reg; |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 11709 | context.type = eContextRegisterStore; |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 11710 | // for r = 0 to regs-1 |
| 11711 | for (int r = 0; r < regs; ++r) |
| 11712 | { |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 11713 | GetRegisterInfo (eRegisterKindDWARF, dwarf_d0 + d + r, data_reg); |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 11714 | uint64_t register_data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_d0 + d + r, 0, &success); |
| 11715 | if (!success) |
| 11716 | return false; |
| 11717 | |
| 11718 | // for e = 0 to elements-1 |
| 11719 | for (int e = 0; e < elements; ++e) |
| 11720 | { |
| 11721 | // MemU[address,ebytes] = Elem[D[d+r],e,esize]; |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 11722 | uint64_t word = Bits64 (register_data, ((e + 1) * esize) - 1, e * esize); |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 11723 | |
| 11724 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 11725 | if (!MemUWrite (context, address, word, ebytes)) |
| 11726 | return false; |
| 11727 | |
| 11728 | // address = address + ebytes; |
| 11729 | address = address + ebytes; |
| 11730 | } |
| 11731 | } |
| 11732 | } |
| 11733 | return true; |
| 11734 | } |
| 11735 | |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 11736 | // A8.6.392 VST1 (single element from one lane) |
| 11737 | // This instruction stores one element to memory from one element of a register. |
| 11738 | bool |
| 11739 | EmulateInstructionARM::EmulateVST1Single (const uint32_t opcode, ARMEncoding encoding) |
| 11740 | { |
| 11741 | #if 0 |
| 11742 | if ConditionPassed() then |
| 11743 | EncodingSpecificOperations(); CheckAdvSIMDEnabled(); NullCheckIfThumbEE(n); |
| 11744 | address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11745 | if wback then R[n] = R[n] + (if register_index then R[m] else ebytes); |
| 11746 | MemU[address,ebytes] = Elem[D[d],index,esize]; |
| 11747 | #endif |
| 11748 | |
| 11749 | bool success = false; |
| 11750 | |
| 11751 | if (ConditionPassed (opcode)) |
| 11752 | { |
| 11753 | uint32_t ebytes; |
| 11754 | uint32_t esize; |
| 11755 | uint32_t index; |
| 11756 | uint32_t alignment; |
| 11757 | uint32_t d; |
| 11758 | uint32_t n; |
| 11759 | uint32_t m; |
| 11760 | bool wback; |
| 11761 | bool register_index; |
| 11762 | |
| 11763 | switch (encoding) |
| 11764 | { |
| 11765 | case eEncodingT1: |
| 11766 | case eEncodingA1: |
| 11767 | { |
| 11768 | uint32_t size = Bits32 (opcode, 11, 10); |
| 11769 | uint32_t index_align = Bits32 (opcode, 7, 4); |
| 11770 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11771 | // if size == Ô11Õ then UNDEFINED; |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 11772 | if (size == 3) |
| 11773 | return false; |
| 11774 | |
| 11775 | // case size of |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11776 | if (size == 0) // when Ô00Õ |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 11777 | { |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11778 | // if index_align<0> != Ô0Õ then UNDEFINED; |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 11779 | if (BitIsClear (index_align, 0)) |
| 11780 | return false; |
| 11781 | // ebytes = 1; esize = 8; index = UInt(index_align<3:1>); alignment = 1; |
| 11782 | ebytes = 1; |
| 11783 | esize = 8; |
| 11784 | index = Bits32 (index_align, 3, 1); |
| 11785 | alignment = 1; |
| 11786 | } |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11787 | else if (size == 1) // when Ô01Õ |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 11788 | { |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11789 | // if index_align<1> != Ô0Õ then UNDEFINED; |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 11790 | if (BitIsClear (index_align, 1)) |
| 11791 | return false; |
| 11792 | |
| 11793 | // ebytes = 2; esize = 16; index = UInt(index_align<3:2>); |
| 11794 | ebytes = 2; |
| 11795 | esize = 16; |
| 11796 | index = Bits32 (index_align, 3, 2); |
| 11797 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11798 | // alignment = if index_align<0> == Ô0Õ then 1 else 2; |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 11799 | if (BitIsClear (index_align, 0)) |
| 11800 | alignment = 1; |
| 11801 | else |
| 11802 | alignment = 2; |
| 11803 | } |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11804 | else if (size == 2) // when Ô10Õ |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 11805 | { |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11806 | // if index_align<2> != Ô0Õ then UNDEFINED; |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 11807 | if (BitIsClear (index_align, 2)) |
| 11808 | return false; |
| 11809 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11810 | // if index_align<1:0> != Ô00Õ && index_align<1:0> != Ô11Õ then UNDEFINED; |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 11811 | if ((Bits32 (index_align, 1, 0) != 0) && (Bits32 (index_align, 1, 0) != 3)) |
| 11812 | return false; |
| 11813 | |
| 11814 | // ebytes = 4; esize = 32; index = UInt(index_align<3>); |
| 11815 | ebytes = 4; |
| 11816 | esize = 32; |
| 11817 | index = Bit32 (index_align, 3); |
| 11818 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11819 | // alignment = if index_align<1:0> == Ô00Õ then 1 else 4; |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 11820 | if (Bits32 (index_align, 1, 0) == 0) |
| 11821 | alignment = 1; |
| 11822 | else |
| 11823 | alignment = 4; |
| 11824 | } |
| 11825 | // d = UInt(D:Vd); n = UInt(Rn); m = UInt(Rm); |
| 11826 | d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12); |
| 11827 | n = Bits32 (opcode, 19, 16); |
| 11828 | m = Bits32 (opcode, 3, 0); |
| 11829 | |
| 11830 | // wback = (m != 15); register_index = (m != 15 && m != 13); if n == 15 then UNPREDICTABLE; |
| 11831 | wback = (m != 15); |
| 11832 | register_index = ((m != 15) && (m != 13)); |
| 11833 | |
| 11834 | if (n == 15) |
| 11835 | return false; |
| 11836 | } |
| 11837 | break; |
| 11838 | |
| 11839 | default: |
| 11840 | return false; |
| 11841 | } |
| 11842 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 11843 | RegisterInfo base_reg; |
| 11844 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 11845 | |
| 11846 | uint32_t Rn = ReadCoreReg (n, &success); |
| 11847 | if (!success) |
| 11848 | return false; |
| 11849 | |
| 11850 | // address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11851 | addr_t address = Rn; |
| 11852 | if ((address % alignment) != 0) |
| 11853 | return false; |
| 11854 | |
| 11855 | EmulateInstruction::Context context; |
| 11856 | // if wback then R[n] = R[n] + (if register_index then R[m] else ebytes); |
| 11857 | if (wback) |
| 11858 | { |
| 11859 | uint32_t Rm = ReadCoreReg (m, &success); |
| 11860 | if (!success) |
| 11861 | return false; |
| 11862 | |
| 11863 | uint32_t offset; |
| 11864 | if (register_index) |
| 11865 | offset = Rm; |
| 11866 | else |
| 11867 | offset = ebytes; |
| 11868 | |
| 11869 | context.type = eContextAdjustBaseRegister; |
| 11870 | context.SetRegisterPlusOffset (base_reg, offset); |
| 11871 | |
| 11872 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, Rn + offset)) |
| 11873 | return false; |
| 11874 | } |
| 11875 | |
| 11876 | // MemU[address,ebytes] = Elem[D[d],index,esize]; |
| 11877 | uint64_t register_data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_d0 + d, 0, &success); |
| 11878 | if (!success) |
| 11879 | return false; |
| 11880 | |
| 11881 | uint64_t word = Bits64 (register_data, ((index + 1) * esize) - 1, index * esize); |
| 11882 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 11883 | RegisterInfo data_reg; |
| 11884 | GetRegisterInfo (eRegisterKindDWARF, dwarf_d0 + d, data_reg); |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 11885 | context.type = eContextRegisterStore; |
| 11886 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 11887 | |
| 11888 | if (!MemUWrite (context, address, word, ebytes)) |
| 11889 | return false; |
| 11890 | } |
| 11891 | return true; |
| 11892 | } |
| 11893 | |
Caroline Tice | 8d24b4a | 2011-03-31 21:31:50 +0000 | [diff] [blame] | 11894 | // A8.6.309 VLD1 (single element to all lanes) |
| 11895 | // This instruction loads one element from memory into every element of one or two vectors. |
Caroline Tice | 93767b8 | 2011-03-31 21:15:29 +0000 | [diff] [blame] | 11896 | bool |
Caroline Tice | 8d24b4a | 2011-03-31 21:31:50 +0000 | [diff] [blame] | 11897 | EmulateInstructionARM::EmulateVLD1SingleAll (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 93767b8 | 2011-03-31 21:15:29 +0000 | [diff] [blame] | 11898 | { |
| 11899 | #if 0 |
| 11900 | if ConditionPassed() then |
| 11901 | EncodingSpecificOperations(); CheckAdvSIMDEnabled(); NullCheckIfThumbEE(n); |
| 11902 | address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11903 | if wback then R[n] = R[n] + (if register_index then R[m] else ebytes); |
| 11904 | replicated_element = Replicate(MemU[address,ebytes], elements); |
| 11905 | for r = 0 to regs-1 |
| 11906 | D[d+r] = replicated_element; |
| 11907 | #endif |
| 11908 | |
| 11909 | bool success = false; |
| 11910 | |
| 11911 | if (ConditionPassed (opcode)) |
| 11912 | { |
| 11913 | uint32_t ebytes; |
| 11914 | uint32_t elements; |
| 11915 | uint32_t regs; |
| 11916 | uint32_t alignment; |
| 11917 | uint32_t d; |
| 11918 | uint32_t n; |
| 11919 | uint32_t m; |
| 11920 | bool wback; |
| 11921 | bool register_index; |
| 11922 | |
| 11923 | switch (encoding) |
| 11924 | { |
| 11925 | case eEncodingT1: |
| 11926 | case eEncodingA1: |
| 11927 | { |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11928 | //if size == Ô11Õ || (size == Ô00Õ && a == Ô1Õ) then UNDEFINED; |
Caroline Tice | 93767b8 | 2011-03-31 21:15:29 +0000 | [diff] [blame] | 11929 | uint32_t size = Bits32 (opcode, 7, 6); |
| 11930 | if ((size == 3) || ((size == 0) && BitIsSet (opcode, 4))) |
| 11931 | return false; |
| 11932 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11933 | //ebytes = 1 << UInt(size); elements = 8 DIV ebytes; regs = if T == Ô0Õ then 1 else 2; |
Caroline Tice | 93767b8 | 2011-03-31 21:15:29 +0000 | [diff] [blame] | 11934 | ebytes = 1 << size; |
| 11935 | elements = 8 / ebytes; |
| 11936 | if (BitIsClear (opcode, 5)) |
| 11937 | regs = 1; |
| 11938 | else |
| 11939 | regs = 2; |
| 11940 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 11941 | //alignment = if a == Ô0Õ then 1 else ebytes; |
Caroline Tice | 93767b8 | 2011-03-31 21:15:29 +0000 | [diff] [blame] | 11942 | if (BitIsClear (opcode, 4)) |
| 11943 | alignment = 1; |
| 11944 | else |
| 11945 | alignment = ebytes; |
| 11946 | |
| 11947 | //d = UInt(D:Vd); n = UInt(Rn); m = UInt(Rm); |
| 11948 | d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12); |
| 11949 | n = Bits32 (opcode, 19, 16); |
| 11950 | m = Bits32 (opcode, 3, 0); |
| 11951 | |
| 11952 | //wback = (m != 15); register_index = (m != 15 && m != 13); |
| 11953 | wback = (m != 15); |
| 11954 | register_index = ((m != 15) && (m != 13)); |
| 11955 | |
| 11956 | //if d+regs > 32 then UNPREDICTABLE; if n == 15 then UNPREDICTABLE; |
| 11957 | if ((d + regs) > 32) |
| 11958 | return false; |
| 11959 | |
| 11960 | if (n == 15) |
| 11961 | return false; |
| 11962 | } |
Johnny Chen | 6ac9e54 | 2011-08-16 01:16:02 +0000 | [diff] [blame] | 11963 | break; |
Caroline Tice | 93767b8 | 2011-03-31 21:15:29 +0000 | [diff] [blame] | 11964 | |
| 11965 | default: |
Johnny Chen | 6ac9e54 | 2011-08-16 01:16:02 +0000 | [diff] [blame] | 11966 | return false; |
Caroline Tice | 93767b8 | 2011-03-31 21:15:29 +0000 | [diff] [blame] | 11967 | } |
| 11968 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 11969 | RegisterInfo base_reg; |
| 11970 | GetRegisterInfo (eRegisterKindDWARF, dwarf_r0 + n, base_reg); |
Caroline Tice | 93767b8 | 2011-03-31 21:15:29 +0000 | [diff] [blame] | 11971 | |
| 11972 | uint32_t Rn = ReadCoreReg (n, &success); |
| 11973 | if (!success) |
| 11974 | return false; |
| 11975 | |
| 11976 | // address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11977 | addr_t address = Rn; |
| 11978 | if ((address % alignment) != 0) |
| 11979 | return false; |
| 11980 | |
| 11981 | EmulateInstruction::Context context; |
| 11982 | // if wback then R[n] = R[n] + (if register_index then R[m] else ebytes); |
| 11983 | if (wback) |
| 11984 | { |
| 11985 | uint32_t Rm = ReadCoreReg (m, &success); |
| 11986 | if (!success) |
| 11987 | return false; |
| 11988 | |
| 11989 | uint32_t offset; |
| 11990 | if (register_index) |
| 11991 | offset = Rm; |
| 11992 | else |
| 11993 | offset = ebytes; |
| 11994 | |
| 11995 | context.type = eContextAdjustBaseRegister; |
| 11996 | context.SetRegisterPlusOffset (base_reg, offset); |
| 11997 | |
| 11998 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, Rn + offset)) |
| 11999 | return false; |
| 12000 | } |
| 12001 | |
| 12002 | // replicated_element = Replicate(MemU[address,ebytes], elements); |
| 12003 | |
| 12004 | context.type = eContextRegisterLoad; |
| 12005 | uint64_t word = MemURead (context, address, ebytes, 0, &success); |
| 12006 | if (!success) |
| 12007 | return false; |
| 12008 | |
Johnny Chen | 65f39ed | 2011-08-12 01:10:45 +0000 | [diff] [blame] | 12009 | uint64_t replicated_element = 0; |
Caroline Tice | 93767b8 | 2011-03-31 21:15:29 +0000 | [diff] [blame] | 12010 | uint32_t esize = ebytes * 8; |
| 12011 | for (int e = 0; e < elements; ++e) |
| 12012 | replicated_element = (replicated_element << esize) | Bits64 (word, esize - 1, 0); |
| 12013 | |
| 12014 | // for r = 0 to regs-1 |
| 12015 | for (int r = 0; r < regs; ++r) |
| 12016 | { |
| 12017 | // D[d+r] = replicated_element; |
| 12018 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_d0 + d + r, replicated_element)) |
| 12019 | return false; |
| 12020 | } |
| 12021 | } |
| 12022 | return true; |
| 12023 | } |
| 12024 | |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12025 | // B6.2.13 SUBS PC, LR and related instructions |
| 12026 | //The SUBS PC, LR, #<const? instruction provides an exception return without the use of the stack. It subtracts the |
| 12027 | // immediate constant from the LR, branches to the resulting address, and also copies the SPSR to the CPSR. |
| 12028 | bool |
| 12029 | EmulateInstructionARM::EmulateSUBSPcLrEtc (const uint32_t opcode, const ARMEncoding encoding) |
| 12030 | { |
| 12031 | #if 0 |
| 12032 | if ConditionPassed() then |
| 12033 | EncodingSpecificOperations(); |
| 12034 | if CurrentInstrSet() == InstrSet_ThumbEE then |
| 12035 | UNPREDICTABLE; |
| 12036 | operand2 = if register_form then Shift(R[m], shift_t, shift_n, APSR.C) else imm32; |
| 12037 | case opcode of |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 12038 | when Ô0000Õ result = R[n] AND operand2; // AND |
| 12039 | when Ô0001Õ result = R[n] EOR operand2; // EOR |
| 12040 | when Ô0010Õ (result, -, -) = AddWithCarry(R[n], NOT(operand2), Ô1Õ); // SUB |
| 12041 | when Ô0011Õ (result, -, -) = AddWithCarry(NOT(R[n]), operand2, Ô1Õ); // RSB |
| 12042 | when Ô0100Õ (result, -, -) = AddWithCarry(R[n], operand2, Ô0Õ); // ADD |
| 12043 | when Ô0101Õ (result, -, -) = AddWithCarry(R[n], operand2, APSR.c); // ADC |
| 12044 | when Ô0110Õ (result, -, -) = AddWithCarry(R[n], NOT(operand2), APSR.C); // SBC |
| 12045 | when Ô0111Õ (result, -, -) = AddWithCarry(NOT(R[n]), operand2, APSR.C); // RSC |
| 12046 | when Ô1100Õ result = R[n] OR operand2; // ORR |
| 12047 | when Ô1101Õ result = operand2; // MOV |
| 12048 | when Ô1110Õ result = R[n] AND NOT(operand2); // BIC |
| 12049 | when Ô1111Õ result = NOT(operand2); // MVN |
| 12050 | CPSRWriteByInstr(SPSR[], Ô1111Õ, TRUE); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12051 | BranchWritePC(result); |
| 12052 | #endif |
| 12053 | |
| 12054 | bool success = false; |
| 12055 | |
| 12056 | if (ConditionPassed (opcode)) |
| 12057 | { |
| 12058 | uint32_t n; |
| 12059 | uint32_t m; |
| 12060 | uint32_t imm32; |
| 12061 | bool register_form; |
| 12062 | ARM_ShifterType shift_t; |
| 12063 | uint32_t shift_n; |
| 12064 | uint32_t code; |
| 12065 | |
| 12066 | switch (encoding) |
| 12067 | { |
| 12068 | case eEncodingT1: |
| 12069 | // if CurrentInstrSet() == InstrSet_ThumbEE then UNPREDICTABLE |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 12070 | // n = 14; imm32 = ZeroExtend(imm8, 32); register_form = FALSE; opcode = Ô0010Õ; // = SUB |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12071 | n = 14; |
| 12072 | imm32 = Bits32 (opcode, 7, 0); |
| 12073 | register_form = false; |
| 12074 | code = 2; |
| 12075 | |
| 12076 | // if InITBlock() && !LastInITBlock() then UNPREDICTABLE; |
| 12077 | if (InITBlock() && !LastInITBlock()) |
| 12078 | return false; |
| 12079 | |
| 12080 | break; |
| 12081 | |
| 12082 | case eEncodingA1: |
| 12083 | // n = UInt(Rn); imm32 = ARMExpandImm(imm12); register_form = FALSE; |
| 12084 | n = Bits32 (opcode, 19, 16); |
| 12085 | imm32 = ARMExpandImm (opcode); |
| 12086 | register_form = false; |
| 12087 | code = Bits32 (opcode, 24, 21); |
| 12088 | |
| 12089 | break; |
| 12090 | |
| 12091 | case eEncodingA2: |
| 12092 | // n = UInt(Rn); m = UInt(Rm); register_form = TRUE; |
| 12093 | n = Bits32 (opcode, 19, 16); |
| 12094 | m = Bits32 (opcode, 3, 0); |
| 12095 | register_form = true; |
| 12096 | |
| 12097 | // (shift_t, shift_n) = DecodeImmShift(type, imm5); |
| 12098 | shift_n = DecodeImmShiftARM (opcode, shift_t); |
| 12099 | |
| 12100 | break; |
| 12101 | |
| 12102 | default: |
| 12103 | return false; |
| 12104 | } |
| 12105 | |
| 12106 | // operand2 = if register_form then Shift(R[m], shift_t, shift_n, APSR.C) else imm32; |
| 12107 | uint32_t operand2; |
| 12108 | if (register_form) |
| 12109 | { |
| 12110 | uint32_t Rm = ReadCoreReg (m, &success); |
| 12111 | if (!success) |
| 12112 | return false; |
| 12113 | |
Johnny Chen | a4438a7 | 2011-06-02 22:50:51 +0000 | [diff] [blame] | 12114 | operand2 = Shift (Rm, shift_t, shift_n, APSR_C, &success); |
| 12115 | if (!success) |
| 12116 | return false; |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12117 | } |
| 12118 | else |
| 12119 | { |
| 12120 | operand2 = imm32; |
| 12121 | } |
| 12122 | |
| 12123 | uint32_t Rn = ReadCoreReg (n, &success); |
| 12124 | if (!success) |
| 12125 | return false; |
| 12126 | |
| 12127 | AddWithCarryResult result; |
| 12128 | |
| 12129 | // case opcode of |
| 12130 | switch (code) |
| 12131 | { |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 12132 | case 0: // when Ô0000Õ |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12133 | // result = R[n] AND operand2; // AND |
| 12134 | result.result = Rn & operand2; |
| 12135 | break; |
| 12136 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 12137 | case 1: // when Ô0001Õ |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12138 | // result = R[n] EOR operand2; // EOR |
| 12139 | result.result = Rn ^ operand2; |
| 12140 | break; |
| 12141 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 12142 | case 2: // when Ô0010Õ |
| 12143 | // (result, -, -) = AddWithCarry(R[n], NOT(operand2), Ô1Õ); // SUB |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12144 | result = AddWithCarry (Rn, ~(operand2), 1); |
| 12145 | break; |
| 12146 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 12147 | case 3: // when Ô0011Õ |
| 12148 | // (result, -, -) = AddWithCarry(NOT(R[n]), operand2, Ô1Õ); // RSB |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12149 | result = AddWithCarry (~(Rn), operand2, 1); |
| 12150 | break; |
| 12151 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 12152 | case 4: // when Ô0100Õ |
| 12153 | // (result, -, -) = AddWithCarry(R[n], operand2, Ô0Õ); // ADD |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12154 | result = AddWithCarry (Rn, operand2, 0); |
| 12155 | break; |
| 12156 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 12157 | case 5: // when Ô0101Õ |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12158 | // (result, -, -) = AddWithCarry(R[n], operand2, APSR.c); // ADC |
| 12159 | result = AddWithCarry (Rn, operand2, APSR_C); |
| 12160 | break; |
| 12161 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 12162 | case 6: // when Ô0110Õ |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12163 | // (result, -, -) = AddWithCarry(R[n], NOT(operand2), APSR.C); // SBC |
| 12164 | result = AddWithCarry (Rn, ~(operand2), APSR_C); |
| 12165 | break; |
| 12166 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 12167 | case 7: // when Ô0111Õ |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12168 | // (result, -, -) = AddWithCarry(NOT(R[n]), operand2, APSR.C); // RSC |
| 12169 | result = AddWithCarry (~(Rn), operand2, APSR_C); |
| 12170 | break; |
| 12171 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 12172 | case 10: // when Ô1100Õ |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12173 | // result = R[n] OR operand2; // ORR |
| 12174 | result.result = Rn | operand2; |
| 12175 | break; |
| 12176 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 12177 | case 11: // when Ô1101Õ |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12178 | // result = operand2; // MOV |
| 12179 | result.result = operand2; |
| 12180 | break; |
| 12181 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 12182 | case 12: // when Ô1110Õ |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12183 | // result = R[n] AND NOT(operand2); // BIC |
| 12184 | result.result = Rn & ~(operand2); |
| 12185 | break; |
| 12186 | |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 12187 | case 15: // when Ô1111Õ |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12188 | // result = NOT(operand2); // MVN |
| 12189 | result.result = ~(operand2); |
| 12190 | break; |
| 12191 | |
| 12192 | default: |
| 12193 | return false; |
| 12194 | } |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 12195 | // CPSRWriteByInstr(SPSR[], Ô1111Õ, TRUE); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12196 | |
| 12197 | // For now, in emulation mode, we don't have access to the SPSR, so we will use the CPSR instead, and hope for |
| 12198 | // the best. |
| 12199 | uint32_t spsr = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_cpsr, 0, &success); |
| 12200 | if (!success) |
| 12201 | return false; |
| 12202 | |
| 12203 | CPSRWriteByInstr (spsr, 15, true); |
| 12204 | |
| 12205 | // BranchWritePC(result); |
| 12206 | EmulateInstruction::Context context; |
| 12207 | context.type = eContextAdjustPC; |
| 12208 | context.SetImmediate (result.result); |
| 12209 | |
| 12210 | BranchWritePC (context, result.result); |
| 12211 | } |
| 12212 | return true; |
| 12213 | } |
| 12214 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12215 | EmulateInstructionARM::ARMOpcode* |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 12216 | EmulateInstructionARM::GetARMOpcodeForInstruction (const uint32_t opcode, uint32_t arm_isa) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12217 | { |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12218 | static ARMOpcode |
| 12219 | g_arm_opcodes[] = |
| 12220 | { |
| 12221 | //---------------------------------------------------------------------- |
| 12222 | // Prologue instructions |
| 12223 | //---------------------------------------------------------------------- |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 12224 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12225 | // push register(s) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12226 | { 0x0fff0000, 0x092d0000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulatePUSH, "push <registers>" }, |
| 12227 | { 0x0fff0fff, 0x052d0004, ARMvAll, eEncodingA2, No_VFP, eSize32, &EmulateInstructionARM::EmulatePUSH, "push <register>" }, |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 12228 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12229 | // set r7 to point to a stack offset |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12230 | { 0x0ffff000, 0x028d7000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateADDRdSPImm, "add r7, sp, #<const>" }, |
| 12231 | { 0x0ffff000, 0x024c7000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBR7IPImm, "sub r7, ip, #<const>"}, |
Johnny Chen | e7cf420 | 2011-02-10 18:13:23 +0000 | [diff] [blame] | 12232 | // copy the stack pointer to ip |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12233 | { 0x0fffffff, 0x01a0c00d, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateMOVRdSP, "mov ip, sp" }, |
| 12234 | { 0x0ffff000, 0x028dc000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateADDRdSPImm, "add ip, sp, #<const>" }, |
| 12235 | { 0x0ffff000, 0x024dc000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBIPSPImm, "sub ip, sp, #<const>"}, |
Johnny Chen | 4c0e0bc | 2011-01-25 22:45:28 +0000 | [diff] [blame] | 12236 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12237 | // adjust the stack pointer |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12238 | { 0x0ffff000, 0x024dd000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBSPImm, "sub sp, sp, #<const>"}, |
| 12239 | { 0x0fef0010, 0x004d0000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBSPReg, "sub{s}<c> <Rd>, sp, <Rm>{,<shift>}" }, |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 12240 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12241 | // push one register |
| 12242 | // if Rn == '1101' && imm12 == '000000000100' then SEE PUSH; |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12243 | { 0x0e5f0000, 0x040d0000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRRtSP, "str Rt, [sp, #-imm12]!" }, |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 12244 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12245 | // vector push consecutive extension register(s) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12246 | { 0x0fbf0f00, 0x0d2d0b00, ARMV6T2_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateVPUSH, "vpush.64 <list>"}, |
| 12247 | { 0x0fbf0f00, 0x0d2d0a00, ARMV6T2_ABOVE, eEncodingA2, No_VFP, eSize32, &EmulateInstructionARM::EmulateVPUSH, "vpush.32 <list>"}, |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 12248 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12249 | //---------------------------------------------------------------------- |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 12250 | // Epilogue instructions |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12251 | //---------------------------------------------------------------------- |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 12252 | |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12253 | { 0x0fff0000, 0x08bd0000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulatePOP, "pop <registers>"}, |
| 12254 | { 0x0fff0fff, 0x049d0004, ARMvAll, eEncodingA2, No_VFP, eSize32, &EmulateInstructionARM::EmulatePOP, "pop <register>"}, |
| 12255 | { 0x0fbf0f00, 0x0cbd0b00, ARMV6T2_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateVPOP, "vpop.64 <list>"}, |
| 12256 | { 0x0fbf0f00, 0x0cbd0a00, ARMV6T2_ABOVE, eEncodingA2, No_VFP, eSize32, &EmulateInstructionARM::EmulateVPOP, "vpop.32 <list>"}, |
Johnny Chen | b77be41 | 2011-02-04 00:40:18 +0000 | [diff] [blame] | 12257 | |
| 12258 | //---------------------------------------------------------------------- |
| 12259 | // Supervisor Call (previously Software Interrupt) |
| 12260 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12261 | { 0x0f000000, 0x0f000000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSVC, "svc #imm24"}, |
Johnny Chen | 3b620b3 | 2011-02-07 20:11:47 +0000 | [diff] [blame] | 12262 | |
| 12263 | //---------------------------------------------------------------------- |
| 12264 | // Branch instructions |
| 12265 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12266 | { 0x0f000000, 0x0a000000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateB, "b #imm24"}, |
Johnny Chen | 383d629 | 2011-02-11 21:23:32 +0000 | [diff] [blame] | 12267 | // To resolve ambiguity, "blx <label>" should come before "bl <label>". |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12268 | { 0xfe000000, 0xfa000000, ARMV5_ABOVE, eEncodingA2, No_VFP, eSize32, &EmulateInstructionARM::EmulateBLXImmediate, "blx <label>"}, |
| 12269 | { 0x0f000000, 0x0b000000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateBLXImmediate, "bl <label>"}, |
| 12270 | { 0x0ffffff0, 0x012fff30, ARMV5_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateBLXRm, "blx <Rm>"}, |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 12271 | // for example, "bx lr" |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12272 | { 0x0ffffff0, 0x012fff10, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateBXRm, "bx <Rm>"}, |
Johnny Chen | 59e6ab7 | 2011-02-24 21:01:20 +0000 | [diff] [blame] | 12273 | // bxj |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12274 | { 0x0ffffff0, 0x012fff20, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateBXJRm, "bxj <Rm>"}, |
Johnny Chen | b77be41 | 2011-02-04 00:40:18 +0000 | [diff] [blame] | 12275 | |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 12276 | //---------------------------------------------------------------------- |
Johnny Chen | 28070c3 | 2011-02-12 01:27:26 +0000 | [diff] [blame] | 12277 | // Data-processing instructions |
| 12278 | //---------------------------------------------------------------------- |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 12279 | // adc (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12280 | { 0x0fe00000, 0x02a00000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateADCImm, "adc{s}<c> <Rd>, <Rn>, #const"}, |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 12281 | // adc (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12282 | { 0x0fe00010, 0x00a00000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateADCReg, "adc{s}<c> <Rd>, <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 12283 | // add (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12284 | { 0x0fe00000, 0x02800000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateADDImmARM, "add{s}<c> <Rd>, <Rn>, #const"}, |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 12285 | // add (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12286 | { 0x0fe00010, 0x00800000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateADDReg, "add{s}<c> <Rd>, <Rn>, <Rm> {,<shift>}"}, |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 12287 | // add (register-shifted register) |
Caroline Tice | 0fe5a53 | 2011-04-08 23:33:06 +0000 | [diff] [blame] | 12288 | { 0x0fe00090, 0x00800010, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateADDRegShift, "add{s}<c> <Rd>, <Rn>, <Rm>, <type> <RS>"}, |
Johnny Chen | a695f95 | 2011-02-23 21:24:25 +0000 | [diff] [blame] | 12289 | // adr |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12290 | { 0x0fff0000, 0x028f0000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateADR, "add<c> <Rd>, PC, #<const>"}, |
| 12291 | { 0x0fff0000, 0x024f0000, ARMvAll, eEncodingA2, No_VFP, eSize32, &EmulateInstructionARM::EmulateADR, "sub<c> <Rd>, PC, #<const>"}, |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 12292 | // and (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12293 | { 0x0fe00000, 0x02000000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateANDImm, "and{s}<c> <Rd>, <Rn>, #const"}, |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 12294 | // and (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12295 | { 0x0fe00010, 0x00000000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateANDReg, "and{s}<c> <Rd>, <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 12296 | // bic (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12297 | { 0x0fe00000, 0x03c00000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateBICImm, "bic{s}<c> <Rd>, <Rn>, #const"}, |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 12298 | // bic (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12299 | { 0x0fe00010, 0x01c00000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateBICReg, "bic{s}<c> <Rd>, <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 12300 | // eor (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12301 | { 0x0fe00000, 0x02200000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateEORImm, "eor{s}<c> <Rd>, <Rn>, #const"}, |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 12302 | // eor (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12303 | { 0x0fe00010, 0x00200000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateEORReg, "eor{s}<c> <Rd>, <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 12304 | // orr (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12305 | { 0x0fe00000, 0x03800000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateORRImm, "orr{s}<c> <Rd>, <Rn>, #const"}, |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 12306 | // orr (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12307 | { 0x0fe00010, 0x01800000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateORRReg, "orr{s}<c> <Rd>, <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 12308 | // rsb (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12309 | { 0x0fe00000, 0x02600000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateRSBImm, "rsb{s}<c> <Rd>, <Rn>, #<const>"}, |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 12310 | // rsb (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12311 | { 0x0fe00010, 0x00600000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateRSBReg, "rsb{s}<c> <Rd>, <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 12312 | // rsc (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12313 | { 0x0fe00000, 0x02e00000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateRSCImm, "rsc{s}<c> <Rd>, <Rn>, #<const>"}, |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 12314 | // rsc (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12315 | { 0x0fe00010, 0x00e00000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateRSCReg, "rsc{s}<c> <Rd>, <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 12316 | // sbc (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12317 | { 0x0fe00000, 0x02c00000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSBCImm, "sbc{s}<c> <Rd>, <Rn>, #<const>"}, |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 12318 | // sbc (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12319 | { 0x0fe00010, 0x00c00000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSBCReg, "sbc{s}<c> <Rd>, <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 12320 | // sub (immediate, ARM) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12321 | { 0x0fe00000, 0x02400000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBImmARM, "sub{s}<c> <Rd>, <Rn>, #<const>"}, |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 12322 | // sub (sp minus immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12323 | { 0x0fef0000, 0x024d0000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBSPImm, "sub{s}<c> <Rd>, sp, #<const>"}, |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 12324 | // sub (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12325 | { 0x0fe00010, 0x00400000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBReg, "sub{s}<c> <Rd>, <Rn>, <Rm>{,<shift>}"}, |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 12326 | // teq (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12327 | { 0x0ff0f000, 0x03300000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateTEQImm, "teq<c> <Rn>, #const"}, |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 12328 | // teq (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12329 | { 0x0ff0f010, 0x01300000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateTEQReg, "teq<c> <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 12330 | // tst (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12331 | { 0x0ff0f000, 0x03100000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateTSTImm, "tst<c> <Rn>, #const"}, |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 12332 | // tst (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12333 | { 0x0ff0f010, 0x01100000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateTSTReg, "tst<c> <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 12334 | |
Caroline Tice | 89c6d58 | 2011-03-29 19:53:44 +0000 | [diff] [blame] | 12335 | // mov (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12336 | { 0x0fef0000, 0x03a00000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateMOVRdImm, "mov{s}<c> <Rd>, #<const>"}, |
| 12337 | { 0x0ff00000, 0x03000000, ARMV6T2_ABOVE, eEncodingA2, No_VFP, eSize32, &EmulateInstructionARM::EmulateMOVRdImm, "movw<c> <Rd>, #<imm16>" }, |
Johnny Chen | 01d6157 | 2011-02-25 00:23:25 +0000 | [diff] [blame] | 12338 | // mov (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12339 | { 0x0fef0ff0, 0x01a00000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateMOVRdRm, "mov{s}<c> <Rd>, <Rm>"}, |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 12340 | // mvn (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12341 | { 0x0fef0000, 0x03e00000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateMVNImm, "mvn{s}<c> <Rd>, #<const>"}, |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 12342 | // mvn (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12343 | { 0x0fef0010, 0x01e00000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateMVNReg, "mvn{s}<c> <Rd>, <Rm> {,<shift>}"}, |
Johnny Chen | 3847dad | 2011-02-22 02:00:12 +0000 | [diff] [blame] | 12344 | // cmn (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12345 | { 0x0ff0f000, 0x03700000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateCMNImm, "cmn<c> <Rn>, #<const>"}, |
Johnny Chen | 3847dad | 2011-02-22 02:00:12 +0000 | [diff] [blame] | 12346 | // cmn (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12347 | { 0x0ff0f010, 0x01700000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateCMNReg, "cmn<c> <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 12348 | // cmp (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12349 | { 0x0ff0f000, 0x03500000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateCMPImm, "cmp<c> <Rn>, #<const>"}, |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 12350 | // cmp (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12351 | { 0x0ff0f010, 0x01500000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateCMPReg, "cmp<c> <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 12352 | // asr (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12353 | { 0x0fef0070, 0x01a00040, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateASRImm, "asr{s}<c> <Rd>, <Rm>, #imm"}, |
Johnny Chen | 2ee35bc | 2011-02-16 19:27:43 +0000 | [diff] [blame] | 12354 | // asr (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12355 | { 0x0fef00f0, 0x01a00050, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateASRReg, "asr{s}<c> <Rd>, <Rn>, <Rm>"}, |
Johnny Chen | 2ee35bc | 2011-02-16 19:27:43 +0000 | [diff] [blame] | 12356 | // lsl (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12357 | { 0x0fef0070, 0x01a00000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLSLImm, "lsl{s}<c> <Rd>, <Rm>, #imm"}, |
Johnny Chen | 2ee35bc | 2011-02-16 19:27:43 +0000 | [diff] [blame] | 12358 | // lsl (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12359 | { 0x0fef00f0, 0x01a00010, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLSLReg, "lsl{s}<c> <Rd>, <Rn>, <Rm>"}, |
Johnny Chen | 2ee35bc | 2011-02-16 19:27:43 +0000 | [diff] [blame] | 12360 | // lsr (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12361 | { 0x0fef0070, 0x01a00020, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLSRImm, "lsr{s}<c> <Rd>, <Rm>, #imm"}, |
Johnny Chen | 2ee35bc | 2011-02-16 19:27:43 +0000 | [diff] [blame] | 12362 | // lsr (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12363 | { 0x0fef00f0, 0x01a00050, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLSRReg, "lsr{s}<c> <Rd>, <Rn>, <Rm>"}, |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 12364 | // rrx is a special case encoding of ror (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12365 | { 0x0fef0ff0, 0x01a00060, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateRRX, "rrx{s}<c> <Rd>, <Rm>"}, |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 12366 | // ror (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12367 | { 0x0fef0070, 0x01a00060, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateRORImm, "ror{s}<c> <Rd>, <Rm>, #imm"}, |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 12368 | // ror (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12369 | { 0x0fef00f0, 0x01a00070, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateRORReg, "ror{s}<c> <Rd>, <Rn>, <Rm>"}, |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 12370 | // mul |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12371 | { 0x0fe000f0, 0x00000090, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateMUL, "mul{s}<c> <Rd>,<R>,<Rm>" }, |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 12372 | |
| 12373 | // subs pc, lr and related instructions |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12374 | { 0x0e10f000, 0x0210f000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBSPcLrEtc, "<opc>S<c> PC,#<const> | <Rn>,#<const>" }, |
| 12375 | { 0x0e10f010, 0x0010f000, ARMvAll, eEncodingA2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBSPcLrEtc, "<opc>S<c> PC,<Rn>,<Rm{,<shift>}" }, |
Johnny Chen | 28070c3 | 2011-02-12 01:27:26 +0000 | [diff] [blame] | 12376 | |
| 12377 | //---------------------------------------------------------------------- |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 12378 | // Load instructions |
| 12379 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12380 | { 0x0fd00000, 0x08900000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDM, "ldm<c> <Rn>{!} <registers>" }, |
| 12381 | { 0x0fd00000, 0x08100000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDMDA, "ldmda<c> <Rn>{!} <registers>" }, |
| 12382 | { 0x0fd00000, 0x09100000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDMDB, "ldmdb<c> <Rn>{!} <registers>" }, |
| 12383 | { 0x0fd00000, 0x09900000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDMIB, "ldmib<c> <Rn<{!} <registers>" }, |
| 12384 | { 0x0e500000, 0x04100000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRImmediateARM, "ldr<c> <Rt> [<Rn> {#+/-<imm12>}]" }, |
| 12385 | { 0x0e500010, 0x06100000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRRegister, "ldr<c> <Rt> [<Rn> +/-<Rm> {<shift>}] {!}" }, |
| 12386 | { 0x0e5f0000, 0x045f0000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRBLiteral, "ldrb<c> <Rt>, [...]"}, |
| 12387 | { 0xfe500010, 0x06500000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRBRegister, "ldrb<c> <Rt>, [<Rn>,+/-<Rm>{, <shift>}]{!}" }, |
| 12388 | { 0x0e5f00f0, 0x005f00b0, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRHLiteral, "ldrh<c> <Rt>, <label>" }, |
| 12389 | { 0x0e5000f0, 0x001000b0, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRHRegister, "ldrh<c> <Rt>,[<Rn>,+/-<Rm>]{!}" }, |
| 12390 | { 0x0e5000f0, 0x005000d0, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSBImmediate, "ldrsb<c> <Rt>, [<Rn>{,#+/-<imm8>}]" }, |
| 12391 | { 0x0e5f00f0, 0x005f00d0, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSBLiteral, "ldrsb<c> <Rt> <label>" }, |
| 12392 | { 0x0e5000f0, 0x001000d0, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSBRegister, "ldrsb<c> <Rt>,[<Rn>,+/-<Rm>]{!}" }, |
| 12393 | { 0x0e5000f0, 0x005000f0, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSHImmediate, "ldrsh<c> <Rt>,[<Rn>{,#+/-<imm8>}]"}, |
| 12394 | { 0x0e5f00f0, 0x005f00f0, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSHLiteral, "ldrsh<c> <Rt>,<label>" }, |
| 12395 | { 0x0e5000f0, 0x001000f0, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSHRegister, "ldrsh<c> <Rt>,[<Rn>,+/-<Rm>]{!}" }, |
| 12396 | { 0x0e5000f0, 0x004000d0, ARMV5TE_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRDImmediate, "ldrd<c> <Rt>, <Rt2>, [<Rn>,#+/-<imm8>]!"}, |
| 12397 | { 0x0e500ff0, 0x000000d0, ARMV5TE_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRDRegister, "ldrd<c> <Rt>, <Rt2>, [<Rn>, +/-<Rm>]{!}"}, |
Caroline Tice | 9121b35 | 2011-03-31 16:41:19 +0000 | [diff] [blame] | 12398 | { 0x0e100f00, 0x0c100b00, ARMvAll, eEncodingA1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVLDM, "vldm{mode}<c> <Rn>{!}, <list>"}, |
| 12399 | { 0x0e100f00, 0x0c100a00, ARMvAll, eEncodingA2, VFPv2v3, eSize32, &EmulateInstructionARM::EmulateVLDM, "vldm{mode}<c> <Rn>{!}, <list>"}, |
| 12400 | { 0x0f300f00, 0x0d100b00, ARMvAll, eEncodingA1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVLDR, "vldr<c> <Dd>, [<Rn>{,#+/-<imm>}]"}, |
| 12401 | { 0x0f300f00, 0x0d100a00, ARMvAll, eEncodingA2, VFPv2v3, eSize32, &EmulateInstructionARM::EmulateVLDR, "vldr<c> <Sd>, [<Rn>{,#+/-<imm>}]"}, |
Caroline Tice | b6281b1 | 2011-03-31 17:58:23 +0000 | [diff] [blame] | 12402 | { 0xffb00000, 0xf4200000, ARMvAll, eEncodingA1, AdvancedSIMD, eSize32, &EmulateInstructionARM::EmulateVLD1Multiple, "vld1<c>.<size> <list>, [<Rn>{@<align>}], <Rm>"}, |
| 12403 | { 0xffb00300, 0xf4a00000, ARMvAll, eEncodingA1, AdvancedSIMD, eSize32, &EmulateInstructionARM::EmulateVLD1Single, "vld1<c>.<size> <list>, [<Rn>{@<align>}], <Rm>"}, |
Caroline Tice | 93767b8 | 2011-03-31 21:15:29 +0000 | [diff] [blame] | 12404 | { 0xffb00f00, 0xf4a00c00, ARMvAll, eEncodingA1, AdvancedSIMD, eSize32, &EmulateInstructionARM::EmulateVLD1SingleAll, "vld1<c>.<size> <list>, [<Rn>{@<align>}], <Rm>"}, |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 12405 | |
| 12406 | //---------------------------------------------------------------------- |
| 12407 | // Store instructions |
| 12408 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12409 | { 0x0fd00000, 0x08800000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTM, "stm<c> <Rn>{!} <registers>" }, |
| 12410 | { 0x0fd00000, 0x08000000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTMDA, "stmda<c> <Rn>{!} <registers>" }, |
| 12411 | { 0x0fd00000, 0x09000000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTMDB, "stmdb<c> <Rn>{!} <registers>" }, |
| 12412 | { 0x0fd00000, 0x09800000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTMIB, "stmib<c> <Rn>{!} <registers>" }, |
| 12413 | { 0x0e500010, 0x06000000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRRegister, "str<c> <Rt> [<Rn> +/-<Rm> {<shift>}]{!}" }, |
| 12414 | { 0x0e5000f0, 0x000000b0, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRHRegister, "strh<c> <Rt>,[<Rn>,+/-<Rm>[{!}" }, |
| 12415 | { 0x0ff00ff0, 0x01800f90, ARMV6_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTREX, "strex<c> <Rd>, <Rt>, [<Rn>]"}, |
| 12416 | { 0x0e500000, 0x04400000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRBImmARM, "strb<c> <Rt>,[<Rn>,#+/-<imm12>]!"}, |
| 12417 | { 0x0e500000, 0x04000000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRImmARM, "str<c> <Rt>,[<Rn>,#+/-<imm12>]!"}, |
Caroline Tice | 0fe5a53 | 2011-04-08 23:33:06 +0000 | [diff] [blame] | 12418 | { 0x0e5000f0, 0x004000f0, ARMV5TE_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRDImm, "strd<c> <Rt>, <Rt2>, [<Rn> #+/-<imm8>]!"}, |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12419 | { 0x0e500ff0, 0x000000f0, ARMV5TE_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRDReg, "strd<c> <Rt>, <Rt2>, [<Rn>, +/-<Rm>]{!}"}, |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 12420 | { 0x0e100f00, 0x0c000b00, ARMvAll, eEncodingA1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVSTM, "vstm{mode}<c> <Rn>{!} <list>"}, |
| 12421 | { 0x0e100f00, 0x0c000a00, ARMvAll, eEncodingA2, VFPv2v3, eSize32, &EmulateInstructionARM::EmulateVSTM, "vstm{mode}<c> <Rn>{!} <list>"}, |
| 12422 | { 0x0f300f00, 0x0d000b00, ARMvAll, eEncodingA1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVSTR, "vstr<c> <Dd> [<Rn>{,#+/-<imm>}]"}, |
| 12423 | { 0x0f300f00, 0x0d000a00, ARMvAll, eEncodingA2, VFPv2v3, eSize32, &EmulateInstructionARM::EmulateVSTR, "vstr<c> <Sd> [<Rn>{,#+/-<imm>}]"}, |
| 12424 | { 0xffb00000, 0xf4000000, ARMvAll, eEncodingA1, AdvancedSIMD, eSize32, &EmulateInstructionARM::EmulateVST1Multiple, "vst1<c>.<size> <list>, [<Rn>{@<align>}], <Rm>"}, |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 12425 | { 0xffb00300, 0xf4800000, ARMvAll, eEncodingA1, AdvancedSIMD, eSize32, &EmulateInstructionARM::EmulateVST1Single, "vst1<c>.<size> <list>, [<Rn>{@<align>}], <Rm>"}, |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 12426 | |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 12427 | //---------------------------------------------------------------------- |
| 12428 | // Other instructions |
| 12429 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12430 | { 0x0fff00f0, 0x06af00f0, ARMV6_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSXTB, "sxtb<c> <Rd>,<Rm>{,<rotation>}" }, |
| 12431 | { 0x0fff00f0, 0x06bf0070, ARMV6_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSXTH, "sxth<c> <Rd>,<Rm>{,<rotation>}" }, |
| 12432 | { 0x0fff00f0, 0x06ef0070, ARMV6_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateUXTB, "uxtb<c> <Rd>,<Rm>{,<rotation>}" }, |
| 12433 | { 0x0fff00f0, 0x06ff0070, ARMV6_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateUXTH, "uxth<c> <Rd>,<Rm>{,<rotation>}" }, |
| 12434 | { 0xfe500000, 0xf8100000, ARMV6_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateRFE, "rfe{<amode>} <Rn>{!}" } |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 12435 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12436 | }; |
| 12437 | static const size_t k_num_arm_opcodes = sizeof(g_arm_opcodes)/sizeof(ARMOpcode); |
| 12438 | |
| 12439 | for (size_t i=0; i<k_num_arm_opcodes; ++i) |
| 12440 | { |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 12441 | if ((g_arm_opcodes[i].mask & opcode) == g_arm_opcodes[i].value && |
| 12442 | (g_arm_opcodes[i].variants & arm_isa) != 0) |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12443 | return &g_arm_opcodes[i]; |
| 12444 | } |
| 12445 | return NULL; |
| 12446 | } |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12447 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12448 | |
| 12449 | EmulateInstructionARM::ARMOpcode* |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 12450 | EmulateInstructionARM::GetThumbOpcodeForInstruction (const uint32_t opcode, uint32_t arm_isa) |
Johnny Chen | 347320d | 2011-01-24 23:40:59 +0000 | [diff] [blame] | 12451 | { |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 12452 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12453 | static ARMOpcode |
| 12454 | g_thumb_opcodes[] = |
| 12455 | { |
| 12456 | //---------------------------------------------------------------------- |
| 12457 | // Prologue instructions |
| 12458 | //---------------------------------------------------------------------- |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 12459 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12460 | // push register(s) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12461 | { 0xfffffe00, 0x0000b400, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulatePUSH, "push <registers>" }, |
| 12462 | { 0xffff0000, 0xe92d0000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulatePUSH, "push.w <registers>" }, |
| 12463 | { 0xffff0fff, 0xf84d0d04, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulatePUSH, "push.w <register>" }, |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 12464 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12465 | // set r7 to point to a stack offset |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12466 | { 0xffffff00, 0x0000af00, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateADDRdSPImm, "add r7, sp, #imm" }, |
Johnny Chen | e7cf420 | 2011-02-10 18:13:23 +0000 | [diff] [blame] | 12467 | // copy the stack pointer to r7 |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12468 | { 0xffffffff, 0x0000466f, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateMOVRdSP, "mov r7, sp" }, |
Johnny Chen | e7cf420 | 2011-02-10 18:13:23 +0000 | [diff] [blame] | 12469 | // move from high register to low register (comes after "mov r7, sp" to resolve ambiguity) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12470 | { 0xffffffc0, 0x00004640, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateMOVLowHigh, "mov r0-r7, r8-r15" }, |
Johnny Chen | 60c0d62 | 2011-01-25 23:49:39 +0000 | [diff] [blame] | 12471 | |
Johnny Chen | 864a8e8 | 2011-02-18 00:07:39 +0000 | [diff] [blame] | 12472 | // PC-relative load into register (see also EmulateADDSPRm) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12473 | { 0xfffff800, 0x00004800, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRRtPCRelative, "ldr <Rt>, [PC, #imm]"}, |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 12474 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12475 | // adjust the stack pointer |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12476 | { 0xffffff87, 0x00004485, ARMvAll, eEncodingT2, No_VFP, eSize16, &EmulateInstructionARM::EmulateADDSPRm, "add sp, <Rm>"}, |
| 12477 | { 0xffffff80, 0x0000b080, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSUBSPImm, "sub sp, sp, #imm"}, |
| 12478 | { 0xfbef8f00, 0xf1ad0d00, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBSPImm, "sub.w sp, sp, #<const>"}, |
| 12479 | { 0xfbff8f00, 0xf2ad0d00, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBSPImm, "subw sp, sp, #imm12"}, |
| 12480 | { 0xffef8000, 0xebad0000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBSPReg, "sub{s}<c> <Rd>, sp, <Rm>{,<shift>}" }, |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 12481 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12482 | // vector push consecutive extension register(s) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12483 | { 0xffbf0f00, 0xed2d0b00, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateVPUSH, "vpush.64 <list>"}, |
| 12484 | { 0xffbf0f00, 0xed2d0a00, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateVPUSH, "vpush.32 <list>"}, |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 12485 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12486 | //---------------------------------------------------------------------- |
| 12487 | // Epilogue instructions |
| 12488 | //---------------------------------------------------------------------- |
Johnny Chen | 347320d | 2011-01-24 23:40:59 +0000 | [diff] [blame] | 12489 | |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12490 | { 0xfffff800, 0x0000a800, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateADDSPImm, "add<c> <Rd>, sp, #imm"}, |
| 12491 | { 0xffffff80, 0x0000b000, ARMvAll, eEncodingT2, No_VFP, eSize16, &EmulateInstructionARM::EmulateADDSPImm, "add sp, #imm"}, |
| 12492 | { 0xfffffe00, 0x0000bc00, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulatePOP, "pop <registers>"}, |
| 12493 | { 0xffff0000, 0xe8bd0000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulatePOP, "pop.w <registers>" }, |
| 12494 | { 0xffff0fff, 0xf85d0d04, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulatePOP, "pop.w <register>" }, |
| 12495 | { 0xffbf0f00, 0xecbd0b00, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateVPOP, "vpop.64 <list>"}, |
| 12496 | { 0xffbf0f00, 0xecbd0a00, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateVPOP, "vpop.32 <list>"}, |
Johnny Chen | b77be41 | 2011-02-04 00:40:18 +0000 | [diff] [blame] | 12497 | |
| 12498 | //---------------------------------------------------------------------- |
| 12499 | // Supervisor Call (previously Software Interrupt) |
| 12500 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12501 | { 0xffffff00, 0x0000df00, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSVC, "svc #imm8"}, |
Johnny Chen | c315f86 | 2011-02-05 00:46:10 +0000 | [diff] [blame] | 12502 | |
| 12503 | //---------------------------------------------------------------------- |
| 12504 | // If Then makes up to four following instructions conditional. |
| 12505 | //---------------------------------------------------------------------- |
Greg Clayton | 04d397c | 2011-05-23 18:04:09 +0000 | [diff] [blame] | 12506 | // The next 5 opcode _must_ come before the if then instruction |
| 12507 | { 0xffffffff, 0x0000bf00, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateNop, "nop"}, |
| 12508 | { 0xffffffff, 0x0000bf10, ARMV7_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateNop, "nop YIELD (yield hint)"}, |
| 12509 | { 0xffffffff, 0x0000bf20, ARMV7_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateNop, "nop WFE (wait for event hint)"}, |
| 12510 | { 0xffffffff, 0x0000bf30, ARMV7_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateNop, "nop WFI (wait for interrupt hint)"}, |
| 12511 | { 0xffffffff, 0x0000bf40, ARMV7_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateNop, "nop SEV (send event hint)"}, |
| 12512 | { 0xffffff00, 0x0000bf00, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateIT, "it{<x>{<y>{<z>}}} <firstcond>"}, |
Johnny Chen | 3b620b3 | 2011-02-07 20:11:47 +0000 | [diff] [blame] | 12513 | |
| 12514 | //---------------------------------------------------------------------- |
| 12515 | // Branch instructions |
| 12516 | //---------------------------------------------------------------------- |
| 12517 | // To resolve ambiguity, "b<c> #imm8" should come after "svc #imm8". |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12518 | { 0xfffff000, 0x0000d000, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateB, "b<c> #imm8 (outside IT)"}, |
| 12519 | { 0xfffff800, 0x0000e000, ARMvAll, eEncodingT2, No_VFP, eSize16, &EmulateInstructionARM::EmulateB, "b<c> #imm11 (outside or last in IT)"}, |
| 12520 | { 0xf800d000, 0xf0008000, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateB, "b<c>.w #imm8 (outside IT)"}, |
| 12521 | { 0xf800d000, 0xf0009000, ARMV6T2_ABOVE, eEncodingT4, No_VFP, eSize32, &EmulateInstructionARM::EmulateB, "b<c>.w #imm8 (outside or last in IT)"}, |
Johnny Chen | 383d629 | 2011-02-11 21:23:32 +0000 | [diff] [blame] | 12522 | // J1 == J2 == 1 |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12523 | { 0xf800d000, 0xf000d000, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateBLXImmediate, "bl <label>"}, |
Johnny Chen | 383d629 | 2011-02-11 21:23:32 +0000 | [diff] [blame] | 12524 | // J1 == J2 == 1 |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12525 | { 0xf800d001, 0xf000c000, ARMV5_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateBLXImmediate, "blx <label>"}, |
| 12526 | { 0xffffff87, 0x00004780, ARMV5_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateBLXRm, "blx <Rm>"}, |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 12527 | // for example, "bx lr" |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12528 | { 0xffffff87, 0x00004700, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateBXRm, "bx <Rm>"}, |
Johnny Chen | 59e6ab7 | 2011-02-24 21:01:20 +0000 | [diff] [blame] | 12529 | // bxj |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12530 | { 0xfff0ffff, 0xf3c08f00, ARMV5J_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateBXJRm, "bxj <Rm>"}, |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 12531 | // compare and branch |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12532 | { 0xfffff500, 0x0000b100, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateCB, "cb{n}z <Rn>, <label>"}, |
Johnny Chen | 60299ec | 2011-02-17 19:34:27 +0000 | [diff] [blame] | 12533 | // table branch byte |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12534 | { 0xfff0fff0, 0xe8d0f000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateTB, "tbb<c> <Rn>, <Rm>"}, |
Johnny Chen | 60299ec | 2011-02-17 19:34:27 +0000 | [diff] [blame] | 12535 | // table branch halfword |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12536 | { 0xfff0fff0, 0xe8d0f010, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateTB, "tbh<c> <Rn>, <Rm>, lsl #1"}, |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 12537 | |
| 12538 | //---------------------------------------------------------------------- |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 12539 | // Data-processing instructions |
| 12540 | //---------------------------------------------------------------------- |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 12541 | // adc (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12542 | { 0xfbe08000, 0xf1400000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateADCImm, "adc{s}<c> <Rd>, <Rn>, #<const>"}, |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 12543 | // adc (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12544 | { 0xffffffc0, 0x00004140, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateADCReg, "adcs|adc<c> <Rdn>, <Rm>"}, |
| 12545 | { 0xffe08000, 0xeb400000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateADCReg, "adc{s}<c>.w <Rd>, <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 12546 | // add (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12547 | { 0xfffffe00, 0x00001800, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateADDReg, "adds|add<c> <Rd>, <Rn>, <Rm>"}, |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 12548 | // Make sure "add sp, <Rm>" comes before this instruction, so there's no ambiguity decoding the two. |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12549 | { 0xffffff00, 0x00004400, ARMvAll, eEncodingT2, No_VFP, eSize16, &EmulateInstructionARM::EmulateADDReg, "add<c> <Rdn>, <Rm>"}, |
Johnny Chen | a695f95 | 2011-02-23 21:24:25 +0000 | [diff] [blame] | 12550 | // adr |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12551 | { 0xfffff800, 0x0000a000, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateADR, "add<c> <Rd>, PC, #<const>"}, |
| 12552 | { 0xfbff8000, 0xf2af0000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateADR, "sub<c> <Rd>, PC, #<const>"}, |
| 12553 | { 0xfbff8000, 0xf20f0000, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateADR, "add<c> <Rd>, PC, #<const>"}, |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 12554 | // and (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12555 | { 0xfbe08000, 0xf0000000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateANDImm, "and{s}<c> <Rd>, <Rn>, #<const>"}, |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 12556 | // and (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12557 | { 0xffffffc0, 0x00004000, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateANDReg, "ands|and<c> <Rdn>, <Rm>"}, |
| 12558 | { 0xffe08000, 0xea000000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateANDReg, "and{s}<c>.w <Rd>, <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 12559 | // bic (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12560 | { 0xfbe08000, 0xf0200000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateBICImm, "bic{s}<c> <Rd>, <Rn>, #<const>"}, |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 12561 | // bic (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12562 | { 0xffffffc0, 0x00004380, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateBICReg, "bics|bic<c> <Rdn>, <Rm>"}, |
| 12563 | { 0xffe08000, 0xea200000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateBICReg, "bic{s}<c>.w <Rd>, <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 12564 | // eor (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12565 | { 0xfbe08000, 0xf0800000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateEORImm, "eor{s}<c> <Rd>, <Rn>, #<const>"}, |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 12566 | // eor (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12567 | { 0xffffffc0, 0x00004040, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateEORReg, "eors|eor<c> <Rdn>, <Rm>"}, |
| 12568 | { 0xffe08000, 0xea800000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateEORReg, "eor{s}<c>.w <Rd>, <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 12569 | // orr (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12570 | { 0xfbe08000, 0xf0400000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateORRImm, "orr{s}<c> <Rd>, <Rn>, #<const>"}, |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 12571 | // orr (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12572 | { 0xffffffc0, 0x00004300, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateORRReg, "orrs|orr<c> <Rdn>, <Rm>"}, |
| 12573 | { 0xffe08000, 0xea400000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateORRReg, "orr{s}<c>.w <Rd>, <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 12574 | // rsb (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12575 | { 0xffffffc0, 0x00004240, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateRSBImm, "rsbs|rsb<c> <Rd>, <Rn>, #0"}, |
| 12576 | { 0xfbe08000, 0xf1c00000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateRSBImm, "rsb{s}<c>.w <Rd>, <Rn>, #<const>"}, |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 12577 | // rsb (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12578 | { 0xffe08000, 0xea400000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateRSBReg, "rsb{s}<c>.w <Rd>, <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 12579 | // sbc (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12580 | { 0xfbe08000, 0xf1600000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSBCImm, "sbc{s}<c> <Rd>, <Rn>, #<const>"}, |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 12581 | // sbc (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12582 | { 0xffffffc0, 0x00004180, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSBCReg, "sbcs|sbc<c> <Rdn>, <Rm>"}, |
| 12583 | { 0xffe08000, 0xeb600000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSBCReg, "sbc{s}<c>.w <Rd>, <Rn>, <Rm> {,<shift>}"}, |
Caroline Tice | dcc11b3 | 2011-03-02 23:57:02 +0000 | [diff] [blame] | 12584 | // add (immediate, Thumb) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12585 | { 0xfffffe00, 0x00001c00, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateADDImmThumb, "adds|add<c> <Rd>,<Rn>,#<imm3>" }, |
| 12586 | { 0xfffff800, 0x00003000, ARMV4T_ABOVE, eEncodingT2, No_VFP, eSize16, &EmulateInstructionARM::EmulateADDImmThumb, "adds|add<c> <Rdn>,#<imm8>" }, |
| 12587 | { 0xfbe08000, 0xf1000000, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateADDImmThumb, "add{s}<c>.w <Rd>,<Rn>,#<const>" }, |
| 12588 | { 0xfbf08000, 0xf2000000, ARMV6T2_ABOVE, eEncodingT4, No_VFP, eSize32, &EmulateInstructionARM::EmulateADDImmThumb, "addw<c> <Rd>,<Rn>,#<imm12>" }, |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 12589 | // sub (immediate, Thumb) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12590 | { 0xfffffe00, 0x00001e00, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSUBImmThumb, "subs|sub<c> <Rd>, <Rn> #imm3"}, |
| 12591 | { 0xfffff800, 0x00003800, ARMvAll, eEncodingT2, No_VFP, eSize16, &EmulateInstructionARM::EmulateSUBImmThumb, "subs|sub<c> <Rdn>, #imm8"}, |
| 12592 | { 0xfbe08000, 0xf1a00000, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBImmThumb, "sub{s}<c>.w <Rd>, <Rn>, #<const>"}, |
| 12593 | { 0xfbf08000, 0xf2a00000, ARMV6T2_ABOVE, eEncodingT4, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBImmThumb, "subw<c> <Rd>, <Rn>, #imm12"}, |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 12594 | // sub (sp minus immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12595 | { 0xfbef8000, 0xf1ad0000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBSPImm, "sub{s}.w <Rd>, sp, #<const>"}, |
| 12596 | { 0xfbff8000, 0xf2ad0000, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBSPImm, "subw<c> <Rd>, sp, #imm12"}, |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 12597 | // sub (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12598 | { 0xfffffe00, 0x00001a00, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSUBReg, "subs|sub<c> <Rd>, <Rn>, <Rm>"}, |
| 12599 | { 0xffe08000, 0xeba00000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBReg, "sub{s}<c>.w <Rd>, <Rn>, <Rm>{,<shift>}"}, |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 12600 | // teq (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12601 | { 0xfbf08f00, 0xf0900f00, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateTEQImm, "teq<c> <Rn>, #<const>"}, |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 12602 | // teq (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12603 | { 0xfff08f00, 0xea900f00, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateTEQReg, "teq<c> <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 12604 | // tst (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12605 | { 0xfbf08f00, 0xf0100f00, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateTSTImm, "tst<c> <Rn>, #<const>"}, |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 12606 | // tst (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12607 | { 0xffffffc0, 0x00004200, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateTSTReg, "tst<c> <Rdn>, <Rm>"}, |
| 12608 | { 0xfff08f00, 0xea100f00, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateTSTReg, "tst<c>.w <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 12609 | |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 12610 | |
Johnny Chen | 338bf54 | 2011-02-10 19:29:03 +0000 | [diff] [blame] | 12611 | // move from high register to high register |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12612 | { 0xffffff00, 0x00004600, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateMOVRdRm, "mov<c> <Rd>, <Rm>"}, |
Johnny Chen | 338bf54 | 2011-02-10 19:29:03 +0000 | [diff] [blame] | 12613 | // move from low register to low register |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12614 | { 0xffffffc0, 0x00000000, ARMvAll, eEncodingT2, No_VFP, eSize16, &EmulateInstructionARM::EmulateMOVRdRm, "movs <Rd>, <Rm>"}, |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 12615 | // mov{s}<c>.w <Rd>, <Rm> |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12616 | { 0xffeff0f0, 0xea4f0000, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateMOVRdRm, "mov{s}<c>.w <Rd>, <Rm>"}, |
Johnny Chen | 357c30f | 2011-02-14 22:04:25 +0000 | [diff] [blame] | 12617 | // move immediate |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12618 | { 0xfffff800, 0x00002000, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateMOVRdImm, "movs|mov<c> <Rd>, #imm8"}, |
| 12619 | { 0xfbef8000, 0xf04f0000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateMOVRdImm, "mov{s}<c>.w <Rd>, #<const>"}, |
| 12620 | { 0xfbf08000, 0xf2400000, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateMOVRdImm, "movw<c> <Rd>,#<imm16>"}, |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 12621 | // mvn (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12622 | { 0xfbef8000, 0xf06f0000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateMVNImm, "mvn{s} <Rd>, #<const>"}, |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 12623 | // mvn (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12624 | { 0xffffffc0, 0x000043c0, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateMVNReg, "mvns|mvn<c> <Rd>, <Rm>"}, |
| 12625 | { 0xffef8000, 0xea6f0000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateMVNReg, "mvn{s}<c>.w <Rd>, <Rm> {,<shift>}"}, |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 12626 | // cmn (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12627 | { 0xfbf08f00, 0xf1100f00, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateCMNImm, "cmn<c> <Rn>, #<const>"}, |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 12628 | // cmn (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12629 | { 0xffffffc0, 0x000042c0, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateCMNReg, "cmn<c> <Rn>, <Rm>"}, |
| 12630 | { 0xfff08f00, 0xeb100f00, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateCMNReg, "cmn<c> <Rn>, <Rm> {,<shift>}"}, |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 12631 | // cmp (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12632 | { 0xfffff800, 0x00002800, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateCMPImm, "cmp<c> <Rn>, #imm8"}, |
| 12633 | { 0xfbf08f00, 0xf1b00f00, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateCMPImm, "cmp<c>.w <Rn>, #<const>"}, |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 12634 | // cmp (register) (Rn and Rm both from r0-r7) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12635 | { 0xffffffc0, 0x00004280, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateCMPReg, "cmp<c> <Rn>, <Rm>"}, |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 12636 | // cmp (register) (Rn and Rm not both from r0-r7) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12637 | { 0xffffff00, 0x00004500, ARMvAll, eEncodingT2, No_VFP, eSize16, &EmulateInstructionARM::EmulateCMPReg, "cmp<c> <Rn>, <Rm>"}, |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 12638 | // asr (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12639 | { 0xfffff800, 0x00001000, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateASRImm, "asrs|asr<c> <Rd>, <Rm>, #imm"}, |
| 12640 | { 0xffef8030, 0xea4f0020, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateASRImm, "asr{s}<c>.w <Rd>, <Rm>, #imm"}, |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 12641 | // asr (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12642 | { 0xffffffc0, 0x00004100, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateASRReg, "asrs|asr<c> <Rdn>, <Rm>"}, |
| 12643 | { 0xffe0f0f0, 0xfa40f000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateASRReg, "asr{s}<c>.w <Rd>, <Rn>, <Rm>"}, |
Johnny Chen | 2ee35bc | 2011-02-16 19:27:43 +0000 | [diff] [blame] | 12644 | // lsl (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12645 | { 0xfffff800, 0x00000000, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLSLImm, "lsls|lsl<c> <Rd>, <Rm>, #imm"}, |
| 12646 | { 0xffef8030, 0xea4f0000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLSLImm, "lsl{s}<c>.w <Rd>, <Rm>, #imm"}, |
Johnny Chen | 2ee35bc | 2011-02-16 19:27:43 +0000 | [diff] [blame] | 12647 | // lsl (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12648 | { 0xffffffc0, 0x00004080, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLSLReg, "lsls|lsl<c> <Rdn>, <Rm>"}, |
| 12649 | { 0xffe0f0f0, 0xfa00f000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLSLReg, "lsl{s}<c>.w <Rd>, <Rn>, <Rm>"}, |
Johnny Chen | 2ee35bc | 2011-02-16 19:27:43 +0000 | [diff] [blame] | 12650 | // lsr (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12651 | { 0xfffff800, 0x00000800, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLSRImm, "lsrs|lsr<c> <Rd>, <Rm>, #imm"}, |
| 12652 | { 0xffef8030, 0xea4f0010, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLSRImm, "lsr{s}<c>.w <Rd>, <Rm>, #imm"}, |
Johnny Chen | 2ee35bc | 2011-02-16 19:27:43 +0000 | [diff] [blame] | 12653 | // lsr (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12654 | { 0xffffffc0, 0x000040c0, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLSRReg, "lsrs|lsr<c> <Rdn>, <Rm>"}, |
| 12655 | { 0xffe0f0f0, 0xfa20f000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLSRReg, "lsr{s}<c>.w <Rd>, <Rn>, <Rm>"}, |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 12656 | // rrx is a special case encoding of ror (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12657 | { 0xffeff0f0, 0xea4f0030, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateRRX, "rrx{s}<c>.w <Rd>, <Rm>"}, |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 12658 | // ror (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12659 | { 0xffef8030, 0xea4f0030, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateRORImm, "ror{s}<c>.w <Rd>, <Rm>, #imm"}, |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 12660 | // ror (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12661 | { 0xffffffc0, 0x000041c0, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateRORReg, "rors|ror<c> <Rdn>, <Rm>"}, |
| 12662 | { 0xffe0f0f0, 0xfa60f000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateRORReg, "ror{s}<c>.w <Rd>, <Rn>, <Rm>"}, |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 12663 | // mul |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12664 | { 0xffffffc0, 0x00004340, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateMUL, "muls <Rdm>,<Rn>,<Rdm>" }, |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 12665 | // mul |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12666 | { 0xfff0f0f0, 0xfb00f000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateMUL, "mul<c> <Rd>,<Rn>,<Rm>" }, |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 12667 | |
| 12668 | // subs pc, lr and related instructions |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12669 | { 0xffffff00, 0xf3de8f00, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBSPcLrEtc, "SUBS<c> PC, LR, #<imm8>" }, |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12670 | |
| 12671 | //---------------------------------------------------------------------- |
| 12672 | // RFE instructions *** IMPORTANT *** THESE MUST BE LISTED **BEFORE** THE LDM.. Instructions in this table; |
| 12673 | // otherwise the wrong instructions will be selected. |
| 12674 | //---------------------------------------------------------------------- |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 12675 | |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12676 | { 0xffd0ffff, 0xe810c000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateRFE, "rfedb<c> <Rn>{!}" }, |
| 12677 | { 0xffd0ffff, 0xe990c000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateRFE, "rfe{ia}<c> <Rn>{!}" }, |
| 12678 | |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 12679 | //---------------------------------------------------------------------- |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 12680 | // Load instructions |
| 12681 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12682 | { 0xfffff800, 0x0000c800, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDM, "ldm<c> <Rn>{!} <registers>" }, |
| 12683 | { 0xffd02000, 0xe8900000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDM, "ldm<c>.w <Rn>{!} <registers>" }, |
| 12684 | { 0xffd00000, 0xe9100000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDMDB, "ldmdb<c> <Rn>{!} <registers>" }, |
| 12685 | { 0xfffff800, 0x00006800, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRRtRnImm, "ldr<c> <Rt>, [<Rn>{,#imm}]"}, |
| 12686 | { 0xfffff800, 0x00009800, ARMV4T_ABOVE, eEncodingT2, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRRtRnImm, "ldr<c> <Rt>, [SP{,#imm}]"}, |
| 12687 | { 0xfff00000, 0xf8d00000, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRRtRnImm, "ldr<c>.w <Rt>, [<Rn>{,#imm12}]"}, |
| 12688 | { 0xfff00800, 0xf8500800, ARMV6T2_ABOVE, eEncodingT4, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRRtRnImm, "ldr<c> <Rt>, [<Rn>{,#+/-<imm8>}]{!}"}, |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 12689 | // Thumb2 PC-relative load into register |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12690 | { 0xff7f0000, 0xf85f0000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRRtPCRelative, "ldr<c>.w <Rt>, [PC, +/-#imm}]"}, |
| 12691 | { 0xfffffe00, 0x00005800, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRRegister, "ldr<c> <Rt>, [<Rn>, <Rm>]" }, |
| 12692 | { 0xfff00fc0, 0xf8500000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRRegister, "ldr<c>.w <Rt>, [<Rn>,<Rm>{,LSL #<imm2>}]" }, |
| 12693 | { 0xfffff800, 0x00007800, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRBImmediate, "ldrb<c> <Rt>,[<Rn>{,#<imm5>}]" }, |
| 12694 | { 0xfff00000, 0xf8900000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRBImmediate, "ldrb<c>.w <Rt>,[<Rn>{,#<imm12>}]" }, |
Caroline Tice | 0fe5a53 | 2011-04-08 23:33:06 +0000 | [diff] [blame] | 12695 | { 0xfff00800, 0xf8100800, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRBImmediate, "ldrb<c> <Rt>,[<Rn>, #+/-<imm8>]{!}" }, |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12696 | { 0xff7f0000, 0xf81f0000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRBLiteral, "ldrb<c> <Rt>,[...]" }, |
| 12697 | { 0xfffffe00, 0x00005c00, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRBRegister, "ldrb<c> <Rt>,[<Rn>,<Rm>]" }, |
| 12698 | { 0xfff00fc0, 0xf8100000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRBRegister, "ldrb<c>.w <Rt>,[<Rn>,<Rm>{,LSL #imm2>}]" }, |
| 12699 | { 0xfffff800, 0x00008800, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRHImmediate, "ldrh<c> <Rt>, [<Rn>{,#<imm>}]" }, |
| 12700 | { 0xfff00000, 0xf8b00000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRHImmediate, "ldrh<c>.w <Rt>,[<Rn>{,#<imm12>}]" }, |
| 12701 | { 0xfff00800, 0xf8300800, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRHImmediate, "ldrh<c> <Rt>,[<Rn>,#+/-<imm8>]{!}" }, |
| 12702 | { 0xff7f0000, 0xf83f0000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRHLiteral, "ldrh<c> <Rt>, <label>" }, |
| 12703 | { 0xfffffe00, 0x00005a00, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRHRegister, "ldrh<c> <Rt>, [<Rn>,<Rm>]" }, |
| 12704 | { 0xfff00fc0, 0xf8300000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRHRegister, "ldrh<c>.w <Rt>,[<Rn>,<Rm>{,LSL #<imm2>}]" }, |
| 12705 | { 0xfff00000, 0xf9900000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSBImmediate, "ldrsb<c> <Rt>,[<Rn>,#<imm12>]" }, |
| 12706 | { 0xfff00800, 0xf9100800, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSBImmediate, "ldrsb<c> <Rt>,[<Rn>,#+/-<imm8>]" }, |
| 12707 | { 0xff7f0000, 0xf91f0000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSBLiteral, "ldrsb<c> <Rt>, <label>" }, |
| 12708 | { 0xfffffe00, 0x00005600, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRSBRegister, "ldrsb<c> <Rt>,[<Rn>,<Rm>]" }, |
| 12709 | { 0xfff00fc0, 0xf9100000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSBRegister, "ldrsb<c>.w <Rt>,[<Rn>,<Rm>{,LSL #imm2>}]" }, |
| 12710 | { 0xfff00000, 0xf9b00000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSHImmediate, "ldrsh<c> <Rt>,[<Rn>,#<imm12>]" }, |
| 12711 | { 0xfff00800, 0xf9300800, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSHImmediate, "ldrsh<c> <Rt>,[<Rn>,#+/-<imm8>]" }, |
| 12712 | { 0xff7f0000, 0xf93f0000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSHLiteral, "ldrsh<c> <Rt>,<label>" }, |
| 12713 | { 0xfffffe00, 0x00005e00, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRSHRegister, "ldrsh<c> <Rt>,[<Rn>,<Rm>]" }, |
| 12714 | { 0xfff00fc0, 0xf9300000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSHRegister, "ldrsh<c>.w <Rt>,[<Rn>,<Rm>{,LSL #<imm2>}]" }, |
Caroline Tice | 0fe5a53 | 2011-04-08 23:33:06 +0000 | [diff] [blame] | 12715 | { 0xfe500000, 0xe8500000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRDImmediate, "ldrd<c> <Rt>, <Rt2>, [<Rn>,#+/-<imm>]!"}, |
Caroline Tice | 9121b35 | 2011-03-31 16:41:19 +0000 | [diff] [blame] | 12716 | { 0xfe100f00, 0xec100b00, ARMvAll, eEncodingT1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVLDM, "vldm{mode}<c> <Rn>{!}, <list>"}, |
| 12717 | { 0xfe100f00, 0xec100a00, ARMvAll, eEncodingT2, VFPv2v3, eSize32, &EmulateInstructionARM::EmulateVLDM, "vldm{mode}<c> <Rn>{!}, <list>" }, |
| 12718 | { 0xffe00f00, 0xed100b00, ARMvAll, eEncodingT1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVLDR, "vldr<c> <Dd>, [<Rn>{,#+/-<imm>}]"}, |
| 12719 | { 0xff300f00, 0xed100a00, ARMvAll, eEncodingT2, VFPv2v3, eSize32, &EmulateInstructionARM::EmulateVLDR, "vldr<c> <Sd>, {<Rn>{,#+/-<imm>}]"}, |
Caroline Tice | b6281b1 | 2011-03-31 17:58:23 +0000 | [diff] [blame] | 12720 | { 0xffb00000, 0xf9200000, ARMvAll, eEncodingT1, AdvancedSIMD, eSize32, &EmulateInstructionARM::EmulateVLD1Multiple, "vld1<c>.<size> <list>, [<Rn>{@<align>}],<Rm>"}, |
| 12721 | { 0xffb00300, 0xf9a00000, ARMvAll, eEncodingT1, AdvancedSIMD, eSize32, &EmulateInstructionARM::EmulateVLD1Single, "vld1<c>.<size> <list>, [<Rn>{@<align>}],<Rm>"}, |
Caroline Tice | 93767b8 | 2011-03-31 21:15:29 +0000 | [diff] [blame] | 12722 | { 0xffb00f00, 0xf9a00c00, ARMvAll, eEncodingT1, AdvancedSIMD, eSize32, &EmulateInstructionARM::EmulateVLD1SingleAll, "vld1<c>.<size> <list>, [<Rn>{@<align>}], <Rm>"}, |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 12723 | |
| 12724 | //---------------------------------------------------------------------- |
| 12725 | // Store instructions |
| 12726 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12727 | { 0xfffff800, 0x0000c000, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSTM, "stm<c> <Rn>{!} <registers>" }, |
| 12728 | { 0xffd00000, 0xe8800000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTM, "stm<c>.w <Rn>{!} <registers>" }, |
| 12729 | { 0xffd00000, 0xe9000000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTMDB, "stmdb<c> <Rn>{!} <registers>" }, |
| 12730 | { 0xfffff800, 0x00006000, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSTRThumb, "str<c> <Rt>, [<Rn>{,#<imm>}]" }, |
| 12731 | { 0xfffff800, 0x00009000, ARMV4T_ABOVE, eEncodingT2, No_VFP, eSize16, &EmulateInstructionARM::EmulateSTRThumb, "str<c> <Rt>, [SP,#<imm>]" }, |
| 12732 | { 0xfff00000, 0xf8c00000, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRThumb, "str<c>.w <Rt>, [<Rn>,#<imm12>]" }, |
| 12733 | { 0xfff00800, 0xf8400800, ARMV6T2_ABOVE, eEncodingT4, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRThumb, "str<c> <Rt>, [<Rn>,#+/-<imm8>]" }, |
| 12734 | { 0xfffffe00, 0x00005000, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSTRRegister, "str<c> <Rt> ,{<Rn>, <Rm>]" }, |
| 12735 | { 0xfff00fc0, 0xf8400000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRRegister, "str<c>.w <Rt>, [<Rn>, <Rm> {lsl #imm2>}]" }, |
| 12736 | { 0xfffff800, 0x00007000, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSTRBThumb, "strb<c> <Rt>, [<Rn>, #<imm5>]" }, |
| 12737 | { 0xfff00000, 0xf8800000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRBThumb, "strb<c>.w <Rt>, [<Rn>, #<imm12>]" }, |
| 12738 | { 0xfff00800, 0xf8000800, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRBThumb, "strb<c> <Rt> ,[<Rn>, #+/-<imm8>]{!}" }, |
| 12739 | { 0xfffffe00, 0x00005200, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSTRHRegister, "strh<c> <Rt>,[<Rn>,<Rm>]" }, |
| 12740 | { 0xfff00fc0, 0xf8200000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRHRegister, "strh<c>.w <Rt>,[<Rn>,<Rm>{,LSL #<imm2>}]" }, |
| 12741 | { 0xfff00000, 0xe8400000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTREX, "strex<c> <Rd>, <Rt>, [<Rn{,#<imm>}]" }, |
| 12742 | { 0xfe500000, 0xe8400000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRDImm, "strd<c> <Rt>, <Rt2>, [<Rn>, #+/-<imm>]!"}, |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 12743 | { 0xfe100f00, 0xec000b00, ARMvAll, eEncodingT1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVSTM, "vstm{mode}<c> <Rn>{!}, <list>"}, |
| 12744 | { 0xfea00f00, 0xec000a00, ARMvAll, eEncodingT2, VFPv2v3, eSize32, &EmulateInstructionARM::EmulateVSTM, "vstm{mode}<c> <Rn>{!}, <list>"}, |
| 12745 | { 0xff300f00, 0xed000b00, ARMvAll, eEncodingT1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVSTR, "vstr<c> <Dd>, [<Rn>{,#+/-<imm>}]"}, |
| 12746 | { 0xff300f00, 0xed000a00, ARMvAll, eEncodingT2, VFPv2v3, eSize32, &EmulateInstructionARM::EmulateVSTR, "vstr<c> <Sd>, [<Rn>{,#+/-<imm>}]"}, |
| 12747 | { 0xffb00000, 0xfa000000, ARMvAll, eEncodingT1, AdvancedSIMD, eSize32, &EmulateInstructionARM::EmulateVST1Multiple, "vst1<c>.<size> <list>, [<Rn>{@<align>}], <Rm>"}, |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 12748 | { 0xffb00300, 0xf9800000, ARMvAll, eEncodingT1, AdvancedSIMD, eSize32, &EmulateInstructionARM::EmulateVST1Single, "vst1<c>.<size> <list>, [<Rn>{@<align>}], <Rm>"}, |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 12749 | |
| 12750 | //---------------------------------------------------------------------- |
| 12751 | // Other instructions |
| 12752 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12753 | { 0xffffffc0, 0x0000b240, ARMV6_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSXTB, "sxtb<c> <Rd>,<Rm>" }, |
| 12754 | { 0xfffff080, 0xfa4ff080, ARMV6_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSXTB, "sxtb<c>.w <Rd>,<Rm>{,<rotation>}" }, |
| 12755 | { 0xffffffc0, 0x0000b200, ARMV6_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSXTH, "sxth<c> <Rd>,<Rm>" }, |
| 12756 | { 0xfffff080, 0xfa0ff080, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSXTH, "sxth<c>.w <Rd>,<Rm>{,<rotation>}" }, |
| 12757 | { 0xffffffc0, 0x0000b2c0, ARMV6_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateUXTB, "uxtb<c> <Rd>,<Rm>" }, |
| 12758 | { 0xfffff080, 0xfa5ff080, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateUXTB, "uxtb<c>.w <Rd>,<Rm>{,<rotation>}" }, |
| 12759 | { 0xffffffc0, 0x0000b280, ARMV6_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateUXTH, "uxth<c> <Rd>,<Rm>" }, |
| 12760 | { 0xfffff080, 0xfa1ff080, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateUXTH, "uxth<c>.w <Rd>,<Rm>{,<rotation>}" }, |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12761 | }; |
| 12762 | |
| 12763 | const size_t k_num_thumb_opcodes = sizeof(g_thumb_opcodes)/sizeof(ARMOpcode); |
| 12764 | for (size_t i=0; i<k_num_thumb_opcodes; ++i) |
| 12765 | { |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 12766 | if ((g_thumb_opcodes[i].mask & opcode) == g_thumb_opcodes[i].value && |
| 12767 | (g_thumb_opcodes[i].variants & arm_isa) != 0) |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12768 | return &g_thumb_opcodes[i]; |
| 12769 | } |
| 12770 | return NULL; |
| 12771 | } |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12772 | |
Greg Clayton | 31e2a38 | 2011-01-30 20:03:56 +0000 | [diff] [blame] | 12773 | bool |
Greg Clayton | 395fc33 | 2011-02-15 21:59:32 +0000 | [diff] [blame] | 12774 | EmulateInstructionARM::SetArchitecture (const ArchSpec &arch) |
Greg Clayton | 31e2a38 | 2011-01-30 20:03:56 +0000 | [diff] [blame] | 12775 | { |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12776 | m_arch = arch; |
Greg Clayton | 31e2a38 | 2011-01-30 20:03:56 +0000 | [diff] [blame] | 12777 | m_arm_isa = 0; |
Greg Clayton | 940b103 | 2011-02-23 00:35:02 +0000 | [diff] [blame] | 12778 | const char *arch_cstr = arch.GetArchitectureName (); |
Greg Clayton | 395fc33 | 2011-02-15 21:59:32 +0000 | [diff] [blame] | 12779 | if (arch_cstr) |
Greg Clayton | 31e2a38 | 2011-01-30 20:03:56 +0000 | [diff] [blame] | 12780 | { |
Greg Clayton | 395fc33 | 2011-02-15 21:59:32 +0000 | [diff] [blame] | 12781 | if (0 == ::strcasecmp(arch_cstr, "armv4t")) m_arm_isa = ARMv4T; |
| 12782 | else if (0 == ::strcasecmp(arch_cstr, "armv4")) m_arm_isa = ARMv4; |
| 12783 | else if (0 == ::strcasecmp(arch_cstr, "armv5tej")) m_arm_isa = ARMv5TEJ; |
| 12784 | else if (0 == ::strcasecmp(arch_cstr, "armv5te")) m_arm_isa = ARMv5TE; |
| 12785 | else if (0 == ::strcasecmp(arch_cstr, "armv5t")) m_arm_isa = ARMv5T; |
| 12786 | else if (0 == ::strcasecmp(arch_cstr, "armv6k")) m_arm_isa = ARMv6K; |
| 12787 | else if (0 == ::strcasecmp(arch_cstr, "armv6")) m_arm_isa = ARMv6; |
| 12788 | else if (0 == ::strcasecmp(arch_cstr, "armv6t2")) m_arm_isa = ARMv6T2; |
| 12789 | else if (0 == ::strcasecmp(arch_cstr, "armv7")) m_arm_isa = ARMv7; |
| 12790 | else if (0 == ::strcasecmp(arch_cstr, "armv8")) m_arm_isa = ARMv8; |
Johnny Chen | 1d29a85 | 2011-04-26 18:51:57 +0000 | [diff] [blame] | 12791 | else if (0 == ::strcasecmp(arch_cstr, "arm")) m_arm_isa = ARMvAll; |
| 12792 | else if (0 == ::strcasecmp(arch_cstr, "thumb")) m_arm_isa = ARMvAll; |
Greg Clayton | 31e2a38 | 2011-01-30 20:03:56 +0000 | [diff] [blame] | 12793 | } |
| 12794 | return m_arm_isa != 0; |
| 12795 | } |
| 12796 | |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12797 | bool |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 12798 | EmulateInstructionARM::SetInstruction (const Opcode &insn_opcode, const Address &inst_addr, Target *target) |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12799 | { |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 12800 | if (EmulateInstruction::SetInstruction (insn_opcode, inst_addr, target)) |
| 12801 | { |
| 12802 | if (m_arch.GetTriple().getArch() == llvm::Triple::thumb) |
| 12803 | m_opcode_mode = eModeThumb; |
| 12804 | else |
| 12805 | { |
| 12806 | AddressClass addr_class = inst_addr.GetAddressClass(); |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12807 | |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 12808 | if ((addr_class == eAddressClassCode) || (addr_class == eAddressClassUnknown)) |
| 12809 | m_opcode_mode = eModeARM; |
| 12810 | else if (addr_class == eAddressClassCodeAlternateISA) |
| 12811 | m_opcode_mode = eModeThumb; |
| 12812 | else |
| 12813 | return false; |
| 12814 | } |
| 12815 | if (m_opcode_mode == eModeThumb) |
| 12816 | m_opcode_cpsr = CPSR_MODE_USR | MASK_CPSR_T; |
| 12817 | else |
| 12818 | m_opcode_cpsr = CPSR_MODE_USR; |
| 12819 | return true; |
| 12820 | } |
| 12821 | return false; |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12822 | } |
Greg Clayton | 31e2a38 | 2011-01-30 20:03:56 +0000 | [diff] [blame] | 12823 | |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12824 | bool |
| 12825 | EmulateInstructionARM::ReadInstruction () |
| 12826 | { |
| 12827 | bool success = false; |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12828 | m_opcode_cpsr = ReadRegisterUnsigned (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FLAGS, 0, &success); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12829 | if (success) |
| 12830 | { |
| 12831 | addr_t pc = ReadRegisterUnsigned (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC, LLDB_INVALID_ADDRESS, &success); |
| 12832 | if (success) |
| 12833 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 12834 | Context read_inst_context; |
| 12835 | read_inst_context.type = eContextReadOpcode; |
| 12836 | read_inst_context.SetNoArgs (); |
| 12837 | |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12838 | if (m_opcode_cpsr & MASK_CPSR_T) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12839 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12840 | m_opcode_mode = eModeThumb; |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 12841 | uint32_t thumb_opcode = MemARead(read_inst_context, pc, 2, 0, &success); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12842 | |
| 12843 | if (success) |
| 12844 | { |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12845 | if ((thumb_opcode & 0xe000) != 0xe000 || ((thumb_opcode & 0x1800u) == 0)) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12846 | { |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12847 | m_opcode.SetOpcode16 (thumb_opcode); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12848 | } |
| 12849 | else |
| 12850 | { |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12851 | m_opcode.SetOpcode32 ((thumb_opcode << 16) | MemARead(read_inst_context, pc + 2, 2, 0, &success)); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12852 | } |
| 12853 | } |
| 12854 | } |
| 12855 | else |
| 12856 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12857 | m_opcode_mode = eModeARM; |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12858 | m_opcode.SetOpcode32 (MemARead(read_inst_context, pc, 4, 0, &success)); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12859 | } |
| 12860 | } |
| 12861 | } |
| 12862 | if (!success) |
| 12863 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12864 | m_opcode_mode = eModeInvalid; |
Greg Clayton | 3063c95 | 2011-04-29 22:50:31 +0000 | [diff] [blame] | 12865 | m_addr = LLDB_INVALID_ADDRESS; |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12866 | } |
| 12867 | return success; |
| 12868 | } |
| 12869 | |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 12870 | uint32_t |
| 12871 | EmulateInstructionARM::ArchVersion () |
| 12872 | { |
| 12873 | return m_arm_isa; |
| 12874 | } |
| 12875 | |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12876 | bool |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 12877 | EmulateInstructionARM::ConditionPassed (const uint32_t opcode, bool *is_conditional) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12878 | { |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 12879 | // If we are ignoring conditions, then always return true. |
| 12880 | // this allows us to iterate over disassembly code and still |
| 12881 | // emulate an instruction even if we don't have all the right |
| 12882 | // bits set in the CPSR register... |
| 12883 | if (m_ignore_conditions) |
| 12884 | return true; |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 12885 | |
| 12886 | if (is_conditional) |
| 12887 | *is_conditional = true; |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12888 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12889 | const uint32_t cond = CurrentCond (opcode); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12890 | |
| 12891 | if (cond == UINT32_MAX) |
| 12892 | return false; |
| 12893 | |
| 12894 | bool result = false; |
| 12895 | switch (UnsignedBits(cond, 3, 1)) |
| 12896 | { |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12897 | case 0: |
| 12898 | if (m_opcode_cpsr == 0) |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 12899 | result = true; |
| 12900 | else |
| 12901 | result = (m_opcode_cpsr & MASK_CPSR_Z) != 0; |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12902 | break; |
| 12903 | case 1: |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 12904 | if (m_opcode_cpsr == 0) |
| 12905 | result = true; |
| 12906 | else |
| 12907 | result = (m_opcode_cpsr & MASK_CPSR_C) != 0; |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12908 | break; |
| 12909 | case 2: |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 12910 | if (m_opcode_cpsr == 0) |
| 12911 | result = true; |
| 12912 | else |
| 12913 | result = (m_opcode_cpsr & MASK_CPSR_N) != 0; |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12914 | break; |
| 12915 | case 3: |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 12916 | if (m_opcode_cpsr == 0) |
| 12917 | result = true; |
| 12918 | else |
| 12919 | result = (m_opcode_cpsr & MASK_CPSR_V) != 0; |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12920 | break; |
| 12921 | case 4: |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 12922 | if (m_opcode_cpsr == 0) |
| 12923 | result = true; |
| 12924 | else |
| 12925 | result = ((m_opcode_cpsr & MASK_CPSR_C) != 0) && ((m_opcode_cpsr & MASK_CPSR_Z) == 0); |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12926 | break; |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12927 | case 5: |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 12928 | if (m_opcode_cpsr == 0) |
| 12929 | result = true; |
| 12930 | else |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12931 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12932 | bool n = (m_opcode_cpsr & MASK_CPSR_N); |
| 12933 | bool v = (m_opcode_cpsr & MASK_CPSR_V); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12934 | result = n == v; |
| 12935 | } |
| 12936 | break; |
| 12937 | case 6: |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 12938 | if (m_opcode_cpsr == 0) |
| 12939 | result = true; |
| 12940 | else |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12941 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12942 | bool n = (m_opcode_cpsr & MASK_CPSR_N); |
| 12943 | bool v = (m_opcode_cpsr & MASK_CPSR_V); |
| 12944 | result = n == v && ((m_opcode_cpsr & MASK_CPSR_Z) == 0); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12945 | } |
| 12946 | break; |
| 12947 | case 7: |
Greg Clayton | 107e53d | 2011-07-06 04:07:21 +0000 | [diff] [blame] | 12948 | // Always execute (cond == 0b1110, or the special 0b1111 which gives |
| 12949 | // opcodes different meanings, but always means execution happpens. |
| 12950 | if (is_conditional) |
| 12951 | *is_conditional = false; |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12952 | result = true; |
| 12953 | break; |
| 12954 | } |
| 12955 | |
| 12956 | if (cond & 1) |
| 12957 | result = !result; |
| 12958 | return result; |
| 12959 | } |
| 12960 | |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12961 | uint32_t |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12962 | EmulateInstructionARM::CurrentCond (const uint32_t opcode) |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12963 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12964 | switch (m_opcode_mode) |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12965 | { |
| 12966 | default: |
| 12967 | case eModeInvalid: |
| 12968 | break; |
| 12969 | |
| 12970 | case eModeARM: |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12971 | return UnsignedBits(opcode, 31, 28); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12972 | |
| 12973 | case eModeThumb: |
| 12974 | // For T1 and T3 encodings of the Branch instruction, it returns the 4-bit |
| 12975 | // 'cond' field of the encoding. |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12976 | { |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12977 | const uint32_t byte_size = m_opcode.GetByteSize(); |
| 12978 | if (byte_size == 2) |
| 12979 | { |
| 12980 | if (Bits32(opcode, 15, 12) == 0x0d && Bits32(opcode, 11, 7) != 0x0f) |
| 12981 | return Bits32(opcode, 11, 7); |
| 12982 | } |
Johnny Chen | 6dc5a1a | 2011-06-02 23:19:06 +0000 | [diff] [blame] | 12983 | else if (byte_size == 4) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12984 | { |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12985 | if (Bits32(opcode, 31, 27) == 0x1e && |
| 12986 | Bits32(opcode, 15, 14) == 0x02 && |
| 12987 | Bits32(opcode, 12, 12) == 0x00 && |
| 12988 | Bits32(opcode, 25, 22) <= 0x0d) |
| 12989 | { |
| 12990 | return Bits32(opcode, 25, 22); |
| 12991 | } |
| 12992 | } |
Johnny Chen | 6dc5a1a | 2011-06-02 23:19:06 +0000 | [diff] [blame] | 12993 | else |
| 12994 | // We have an invalid thumb instruction, let's bail out. |
| 12995 | break; |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12996 | |
| 12997 | return m_it_session.GetCond(); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12998 | } |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12999 | } |
| 13000 | return UINT32_MAX; // Return invalid value |
| 13001 | } |
| 13002 | |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 13003 | bool |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 13004 | EmulateInstructionARM::InITBlock() |
| 13005 | { |
| 13006 | return CurrentInstrSet() == eModeThumb && m_it_session.InITBlock(); |
| 13007 | } |
| 13008 | |
| 13009 | bool |
| 13010 | EmulateInstructionARM::LastInITBlock() |
| 13011 | { |
| 13012 | return CurrentInstrSet() == eModeThumb && m_it_session.LastInITBlock(); |
| 13013 | } |
| 13014 | |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 13015 | bool |
| 13016 | EmulateInstructionARM::BadMode (uint32_t mode) |
| 13017 | { |
| 13018 | |
| 13019 | switch (mode) |
| 13020 | { |
| 13021 | case 16: return false; // '10000' |
| 13022 | case 17: return false; // '10001' |
| 13023 | case 18: return false; // '10010' |
| 13024 | case 19: return false; // '10011' |
| 13025 | case 22: return false; // '10110' |
| 13026 | case 23: return false; // '10111' |
| 13027 | case 27: return false; // '11011' |
| 13028 | case 31: return false; // '11111' |
| 13029 | default: return true; |
| 13030 | } |
| 13031 | return true; |
| 13032 | } |
| 13033 | |
| 13034 | bool |
| 13035 | EmulateInstructionARM::CurrentModeIsPrivileged () |
| 13036 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 13037 | uint32_t mode = Bits32 (m_opcode_cpsr, 4, 0); |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 13038 | |
| 13039 | if (BadMode (mode)) |
| 13040 | return false; |
| 13041 | |
| 13042 | if (mode == 16) |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 13043 | return false; |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 13044 | |
| 13045 | return true; |
| 13046 | } |
| 13047 | |
| 13048 | void |
| 13049 | EmulateInstructionARM::CPSRWriteByInstr (uint32_t value, uint32_t bytemask, bool affect_execstate) |
| 13050 | { |
| 13051 | bool privileged = CurrentModeIsPrivileged(); |
| 13052 | |
Johnny Chen | 65f39ed | 2011-08-12 01:10:45 +0000 | [diff] [blame] | 13053 | uint32_t tmp_cpsr = Bits32 (m_opcode_cpsr, 23, 20) << 20; |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 13054 | |
| 13055 | if (BitIsSet (bytemask, 3)) |
| 13056 | { |
| 13057 | tmp_cpsr = tmp_cpsr | (Bits32 (value, 31, 27) << 27); |
| 13058 | if (affect_execstate) |
| 13059 | tmp_cpsr = tmp_cpsr | (Bits32 (value, 26, 24) << 24); |
| 13060 | } |
| 13061 | |
| 13062 | if (BitIsSet (bytemask, 2)) |
| 13063 | { |
| 13064 | tmp_cpsr = tmp_cpsr | (Bits32 (value, 19, 16) << 16); |
| 13065 | } |
| 13066 | |
| 13067 | if (BitIsSet (bytemask, 1)) |
| 13068 | { |
| 13069 | if (affect_execstate) |
| 13070 | tmp_cpsr = tmp_cpsr | (Bits32 (value, 15, 10) << 10); |
| 13071 | tmp_cpsr = tmp_cpsr | (Bit32 (value, 9) << 9); |
| 13072 | if (privileged) |
| 13073 | tmp_cpsr = tmp_cpsr | (Bit32 (value, 8) << 8); |
| 13074 | } |
| 13075 | |
| 13076 | if (BitIsSet (bytemask, 0)) |
| 13077 | { |
| 13078 | if (privileged) |
| 13079 | tmp_cpsr = tmp_cpsr | (Bits32 (value, 7, 6) << 6); |
| 13080 | if (affect_execstate) |
| 13081 | tmp_cpsr = tmp_cpsr | (Bit32 (value, 5) << 5); |
| 13082 | if (privileged) |
| 13083 | tmp_cpsr = tmp_cpsr | Bits32 (value, 4, 0); |
| 13084 | } |
| 13085 | |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 13086 | m_opcode_cpsr = tmp_cpsr; |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 13087 | } |
| 13088 | |
| 13089 | |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 13090 | bool |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 13091 | EmulateInstructionARM::BranchWritePC (const Context &context, uint32_t addr) |
| 13092 | { |
| 13093 | addr_t target; |
| 13094 | |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 13095 | // Check the current instruction set. |
| 13096 | if (CurrentInstrSet() == eModeARM) |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 13097 | target = addr & 0xfffffffc; |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 13098 | else |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 13099 | target = addr & 0xfffffffe; |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 13100 | |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 13101 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC, target)) |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 13102 | return false; |
| 13103 | |
| 13104 | return true; |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 13105 | } |
| 13106 | |
| 13107 | // As a side effect, BXWritePC sets context.arg2 to eModeARM or eModeThumb by inspecting addr. |
| 13108 | bool |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 13109 | EmulateInstructionARM::BXWritePC (Context &context, uint32_t addr) |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 13110 | { |
| 13111 | addr_t target; |
Johnny Chen | 0f309db | 2011-02-09 19:11:32 +0000 | [diff] [blame] | 13112 | // If the CPSR is changed due to switching between ARM and Thumb ISETSTATE, |
| 13113 | // we want to record it and issue a WriteRegister callback so the clients |
| 13114 | // can track the mode changes accordingly. |
| 13115 | bool cpsr_changed = false; |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 13116 | |
| 13117 | if (BitIsSet(addr, 0)) |
| 13118 | { |
Johnny Chen | 0f309db | 2011-02-09 19:11:32 +0000 | [diff] [blame] | 13119 | if (CurrentInstrSet() != eModeThumb) |
| 13120 | { |
| 13121 | SelectInstrSet(eModeThumb); |
| 13122 | cpsr_changed = true; |
| 13123 | } |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 13124 | target = addr & 0xfffffffe; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 13125 | context.SetISA (eModeThumb); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 13126 | } |
| 13127 | else if (BitIsClear(addr, 1)) |
| 13128 | { |
Johnny Chen | 0f309db | 2011-02-09 19:11:32 +0000 | [diff] [blame] | 13129 | if (CurrentInstrSet() != eModeARM) |
| 13130 | { |
| 13131 | SelectInstrSet(eModeARM); |
| 13132 | cpsr_changed = true; |
| 13133 | } |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 13134 | target = addr & 0xfffffffc; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 13135 | context.SetISA (eModeARM); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 13136 | } |
| 13137 | else |
| 13138 | return false; // address<1:0> == '10' => UNPREDICTABLE |
| 13139 | |
Johnny Chen | 0f309db | 2011-02-09 19:11:32 +0000 | [diff] [blame] | 13140 | if (cpsr_changed) |
| 13141 | { |
Johnny Chen | 558133b | 2011-02-09 23:59:17 +0000 | [diff] [blame] | 13142 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FLAGS, m_new_inst_cpsr)) |
Johnny Chen | 0f309db | 2011-02-09 19:11:32 +0000 | [diff] [blame] | 13143 | return false; |
| 13144 | } |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 13145 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC, target)) |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 13146 | return false; |
| 13147 | |
| 13148 | return true; |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 13149 | } |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 13150 | |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 13151 | // Dispatches to either BXWritePC or BranchWritePC based on architecture versions. |
| 13152 | bool |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 13153 | EmulateInstructionARM::LoadWritePC (Context &context, uint32_t addr) |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 13154 | { |
| 13155 | if (ArchVersion() >= ARMv5T) |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 13156 | return BXWritePC(context, addr); |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 13157 | else |
| 13158 | return BranchWritePC((const Context)context, addr); |
| 13159 | } |
| 13160 | |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 13161 | // Dispatches to either BXWritePC or BranchWritePC based on architecture versions and current instruction set. |
| 13162 | bool |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 13163 | EmulateInstructionARM::ALUWritePC (Context &context, uint32_t addr) |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 13164 | { |
| 13165 | if (ArchVersion() >= ARMv7 && CurrentInstrSet() == eModeARM) |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 13166 | return BXWritePC(context, addr); |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 13167 | else |
| 13168 | return BranchWritePC((const Context)context, addr); |
| 13169 | } |
| 13170 | |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 13171 | EmulateInstructionARM::Mode |
| 13172 | EmulateInstructionARM::CurrentInstrSet () |
| 13173 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 13174 | return m_opcode_mode; |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 13175 | } |
| 13176 | |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 13177 | // Set the 'T' bit of our CPSR. The m_opcode_mode gets updated when the next |
Johnny Chen | 558133b | 2011-02-09 23:59:17 +0000 | [diff] [blame] | 13178 | // ReadInstruction() is performed. This function has a side effect of updating |
| 13179 | // the m_new_inst_cpsr member variable if necessary. |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 13180 | bool |
| 13181 | EmulateInstructionARM::SelectInstrSet (Mode arm_or_thumb) |
| 13182 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 13183 | m_new_inst_cpsr = m_opcode_cpsr; |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 13184 | switch (arm_or_thumb) |
| 13185 | { |
| 13186 | default: |
| 13187 | return false; |
| 13188 | eModeARM: |
| 13189 | // Clear the T bit. |
Johnny Chen | 558133b | 2011-02-09 23:59:17 +0000 | [diff] [blame] | 13190 | m_new_inst_cpsr &= ~MASK_CPSR_T; |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 13191 | break; |
| 13192 | eModeThumb: |
| 13193 | // Set the T bit. |
Johnny Chen | 558133b | 2011-02-09 23:59:17 +0000 | [diff] [blame] | 13194 | m_new_inst_cpsr |= MASK_CPSR_T; |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 13195 | break; |
| 13196 | } |
| 13197 | return true; |
| 13198 | } |
| 13199 | |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 13200 | // This function returns TRUE if the processor currently provides support for |
| 13201 | // unaligned memory accesses, or FALSE otherwise. This is always TRUE in ARMv7, |
| 13202 | // controllable by the SCTLR.U bit in ARMv6, and always FALSE before ARMv6. |
| 13203 | bool |
| 13204 | EmulateInstructionARM::UnalignedSupport() |
| 13205 | { |
| 13206 | return (ArchVersion() >= ARMv7); |
| 13207 | } |
| 13208 | |
Johnny Chen | bf6ad17 | 2011-02-11 01:29:53 +0000 | [diff] [blame] | 13209 | // The main addition and subtraction instructions can produce status information |
| 13210 | // about both unsigned carry and signed overflow conditions. This status |
| 13211 | // information can be used to synthesize multi-word additions and subtractions. |
| 13212 | EmulateInstructionARM::AddWithCarryResult |
| 13213 | EmulateInstructionARM::AddWithCarry (uint32_t x, uint32_t y, uint8_t carry_in) |
| 13214 | { |
| 13215 | uint32_t result; |
| 13216 | uint8_t carry_out; |
| 13217 | uint8_t overflow; |
| 13218 | |
| 13219 | uint64_t unsigned_sum = x + y + carry_in; |
| 13220 | int64_t signed_sum = (int32_t)x + (int32_t)y + (int32_t)carry_in; |
| 13221 | |
| 13222 | result = UnsignedBits(unsigned_sum, 31, 0); |
Caroline Tice | 0fe5a53 | 2011-04-08 23:33:06 +0000 | [diff] [blame] | 13223 | // carry_out = (result == unsigned_sum ? 0 : 1); |
Johnny Chen | bf6ad17 | 2011-02-11 01:29:53 +0000 | [diff] [blame] | 13224 | overflow = ((int32_t)result == signed_sum ? 0 : 1); |
Caroline Tice | 0fe5a53 | 2011-04-08 23:33:06 +0000 | [diff] [blame] | 13225 | |
| 13226 | if (carry_in) |
Caroline Tice | 523c554 | 2011-04-13 00:42:12 +0000 | [diff] [blame] | 13227 | carry_out = ((int32_t) x >= (int32_t) (~y)) ? 1 : 0; |
Caroline Tice | 0fe5a53 | 2011-04-08 23:33:06 +0000 | [diff] [blame] | 13228 | else |
| 13229 | carry_out = ((int32_t) x > (int32_t) y) ? 1 : 0; |
Johnny Chen | bf6ad17 | 2011-02-11 01:29:53 +0000 | [diff] [blame] | 13230 | |
| 13231 | AddWithCarryResult res = { result, carry_out, overflow }; |
| 13232 | return res; |
| 13233 | } |
| 13234 | |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 13235 | uint32_t |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 13236 | EmulateInstructionARM::ReadCoreReg(uint32_t num, bool *success) |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 13237 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 13238 | uint32_t reg_kind, reg_num; |
| 13239 | switch (num) |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 13240 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 13241 | case SP_REG: |
| 13242 | reg_kind = eRegisterKindGeneric; |
| 13243 | reg_num = LLDB_REGNUM_GENERIC_SP; |
| 13244 | break; |
| 13245 | case LR_REG: |
| 13246 | reg_kind = eRegisterKindGeneric; |
| 13247 | reg_num = LLDB_REGNUM_GENERIC_RA; |
| 13248 | break; |
| 13249 | case PC_REG: |
| 13250 | reg_kind = eRegisterKindGeneric; |
| 13251 | reg_num = LLDB_REGNUM_GENERIC_PC; |
| 13252 | break; |
| 13253 | default: |
Greg Clayton | 4fdf760 | 2011-03-20 04:57:14 +0000 | [diff] [blame] | 13254 | if (num < SP_REG) |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 13255 | { |
| 13256 | reg_kind = eRegisterKindDWARF; |
| 13257 | reg_num = dwarf_r0 + num; |
| 13258 | } |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 13259 | else |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 13260 | { |
Greg Clayton | e1f47bb | 2011-06-02 22:23:35 +0000 | [diff] [blame] | 13261 | //assert(0 && "Invalid register number"); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 13262 | *success = false; |
Greg Clayton | 4fdf760 | 2011-03-20 04:57:14 +0000 | [diff] [blame] | 13263 | return UINT32_MAX; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 13264 | } |
| 13265 | break; |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 13266 | } |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 13267 | |
| 13268 | // Read our register. |
| 13269 | uint32_t val = ReadRegisterUnsigned (reg_kind, reg_num, 0, success); |
| 13270 | |
| 13271 | // When executing an ARM instruction , PC reads as the address of the current |
| 13272 | // instruction plus 8. |
| 13273 | // When executing a Thumb instruction , PC reads as the address of the current |
| 13274 | // instruction plus 4. |
| 13275 | if (num == 15) |
| 13276 | { |
| 13277 | if (CurrentInstrSet() == eModeARM) |
| 13278 | val += 8; |
| 13279 | else |
| 13280 | val += 4; |
| 13281 | } |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 13282 | |
| 13283 | return val; |
| 13284 | } |
| 13285 | |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 13286 | // Write the result to the ARM core register Rd, and optionally update the |
| 13287 | // condition flags based on the result. |
| 13288 | // |
| 13289 | // This helper method tries to encapsulate the following pseudocode from the |
| 13290 | // ARM Architecture Reference Manual: |
| 13291 | // |
| 13292 | // if d == 15 then // Can only occur for encoding A1 |
| 13293 | // ALUWritePC(result); // setflags is always FALSE here |
| 13294 | // else |
| 13295 | // R[d] = result; |
| 13296 | // if setflags then |
| 13297 | // APSR.N = result<31>; |
| 13298 | // APSR.Z = IsZeroBit(result); |
| 13299 | // APSR.C = carry; |
| 13300 | // // APSR.V unchanged |
| 13301 | // |
| 13302 | // In the above case, the API client does not pass in the overflow arg, which |
| 13303 | // defaults to ~0u. |
| 13304 | bool |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 13305 | EmulateInstructionARM::WriteCoreRegOptionalFlags (Context &context, |
| 13306 | const uint32_t result, |
| 13307 | const uint32_t Rd, |
| 13308 | bool setflags, |
| 13309 | const uint32_t carry, |
| 13310 | const uint32_t overflow) |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 13311 | { |
| 13312 | if (Rd == 15) |
| 13313 | { |
| 13314 | if (!ALUWritePC (context, result)) |
| 13315 | return false; |
| 13316 | } |
| 13317 | else |
| 13318 | { |
Johnny Chen | a695f95 | 2011-02-23 21:24:25 +0000 | [diff] [blame] | 13319 | uint32_t reg_kind, reg_num; |
| 13320 | switch (Rd) |
| 13321 | { |
| 13322 | case SP_REG: |
| 13323 | reg_kind = eRegisterKindGeneric; |
| 13324 | reg_num = LLDB_REGNUM_GENERIC_SP; |
| 13325 | break; |
| 13326 | case LR_REG: |
| 13327 | reg_kind = eRegisterKindGeneric; |
| 13328 | reg_num = LLDB_REGNUM_GENERIC_RA; |
| 13329 | break; |
| 13330 | default: |
| 13331 | reg_kind = eRegisterKindDWARF; |
| 13332 | reg_num = dwarf_r0 + Rd; |
| 13333 | } |
| 13334 | if (!WriteRegisterUnsigned (context, reg_kind, reg_num, result)) |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 13335 | return false; |
| 13336 | if (setflags) |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 13337 | return WriteFlags (context, result, carry, overflow); |
| 13338 | } |
| 13339 | return true; |
| 13340 | } |
| 13341 | |
| 13342 | // This helper method tries to encapsulate the following pseudocode from the |
| 13343 | // ARM Architecture Reference Manual: |
| 13344 | // |
| 13345 | // APSR.N = result<31>; |
| 13346 | // APSR.Z = IsZeroBit(result); |
| 13347 | // APSR.C = carry; |
| 13348 | // APSR.V = overflow |
| 13349 | // |
| 13350 | // Default arguments can be specified for carry and overflow parameters, which means |
| 13351 | // not to update the respective flags. |
| 13352 | bool |
| 13353 | EmulateInstructionARM::WriteFlags (Context &context, |
| 13354 | const uint32_t result, |
| 13355 | const uint32_t carry, |
| 13356 | const uint32_t overflow) |
| 13357 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 13358 | m_new_inst_cpsr = m_opcode_cpsr; |
Johnny Chen | 2434884 | 2011-02-23 00:15:56 +0000 | [diff] [blame] | 13359 | SetBit32(m_new_inst_cpsr, CPSR_N_POS, Bit32(result, CPSR_N_POS)); |
| 13360 | SetBit32(m_new_inst_cpsr, CPSR_Z_POS, result == 0 ? 1 : 0); |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 13361 | if (carry != ~0u) |
Johnny Chen | 2434884 | 2011-02-23 00:15:56 +0000 | [diff] [blame] | 13362 | SetBit32(m_new_inst_cpsr, CPSR_C_POS, carry); |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 13363 | if (overflow != ~0u) |
Johnny Chen | 2434884 | 2011-02-23 00:15:56 +0000 | [diff] [blame] | 13364 | SetBit32(m_new_inst_cpsr, CPSR_V_POS, overflow); |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 13365 | if (m_new_inst_cpsr != m_opcode_cpsr) |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 13366 | { |
| 13367 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FLAGS, m_new_inst_cpsr)) |
| 13368 | return false; |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 13369 | } |
| 13370 | return true; |
| 13371 | } |
| 13372 | |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 13373 | bool |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 13374 | EmulateInstructionARM::EvaluateInstruction (uint32_t evaluate_options) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 13375 | { |
Johnny Chen | c315f86 | 2011-02-05 00:46:10 +0000 | [diff] [blame] | 13376 | // Advance the ITSTATE bits to their values for the next instruction. |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 13377 | if (m_opcode_mode == eModeThumb && m_it_session.InITBlock()) |
Johnny Chen | c315f86 | 2011-02-05 00:46:10 +0000 | [diff] [blame] | 13378 | m_it_session.ITAdvance(); |
| 13379 | |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 13380 | ARMOpcode *opcode_data = NULL; |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 13381 | |
| 13382 | if (m_opcode_mode == eModeThumb) |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 13383 | opcode_data = GetThumbOpcodeForInstruction (m_opcode.GetOpcode32(), m_arm_isa); |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 13384 | else if (m_opcode_mode == eModeARM) |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 13385 | opcode_data = GetARMOpcodeForInstruction (m_opcode.GetOpcode32(), m_arm_isa); |
| 13386 | |
| 13387 | if (opcode_data == NULL) |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 13388 | return false; |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 13389 | |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 13390 | const bool auto_advance_pc = evaluate_options & eEmulateInstructionOptionAutoAdvancePC; |
| 13391 | m_ignore_conditions = evaluate_options & eEmulateInstructionOptionIgnoreConditions; |
Caroline Tice | 0fe5a53 | 2011-04-08 23:33:06 +0000 | [diff] [blame] | 13392 | |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 13393 | bool success = false; |
| 13394 | if (m_opcode_cpsr == 0 || m_ignore_conditions == false) |
Caroline Tice | 0fe5a53 | 2011-04-08 23:33:06 +0000 | [diff] [blame] | 13395 | { |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 13396 | m_opcode_cpsr = ReadRegisterUnsigned (eRegisterKindDWARF, |
Greg Clayton | 061b79d | 2011-05-09 20:18:18 +0000 | [diff] [blame] | 13397 | dwarf_cpsr, |
| 13398 | 0, |
| 13399 | &success); |
Caroline Tice | 0fe5a53 | 2011-04-08 23:33:06 +0000 | [diff] [blame] | 13400 | } |
| 13401 | |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 13402 | // Only return false if we are unable to read the CPSR if we care about conditions |
| 13403 | if (success == false && m_ignore_conditions == false) |
| 13404 | return false; |
| 13405 | |
| 13406 | uint32_t orig_pc_value = 0; |
| 13407 | if (auto_advance_pc) |
| 13408 | { |
| 13409 | orig_pc_value = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_pc, 0, &success); |
| 13410 | if (!success) |
| 13411 | return false; |
| 13412 | } |
| 13413 | |
| 13414 | // Call the Emulate... function. |
| 13415 | success = (this->*opcode_data->callback) (m_opcode.GetOpcode32(), opcode_data->encoding); |
| 13416 | if (!success) |
| 13417 | return false; |
| 13418 | |
| 13419 | if (auto_advance_pc) |
| 13420 | { |
| 13421 | uint32_t after_pc_value = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_pc, 0, &success); |
| 13422 | if (!success) |
| 13423 | return false; |
| 13424 | |
| 13425 | if (auto_advance_pc && (after_pc_value == orig_pc_value)) |
| 13426 | { |
| 13427 | if (opcode_data->size == eSize32) |
| 13428 | after_pc_value += 4; |
| 13429 | else if (opcode_data->size == eSize16) |
| 13430 | after_pc_value += 2; |
| 13431 | |
| 13432 | EmulateInstruction::Context context; |
| 13433 | context.type = eContextAdvancePC; |
| 13434 | context.SetNoArgs(); |
| 13435 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_pc, after_pc_value)) |
| 13436 | return false; |
| 13437 | |
| 13438 | } |
| 13439 | } |
Caroline Tice | 0fe5a53 | 2011-04-08 23:33:06 +0000 | [diff] [blame] | 13440 | return true; |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 13441 | } |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13442 | |
| 13443 | bool |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13444 | EmulateInstructionARM::TestEmulation (Stream *out_stream, ArchSpec &arch, OptionValueDictionary *test_data) |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13445 | { |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13446 | if (!test_data) |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13447 | { |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13448 | out_stream->Printf ("TestEmulation: Missing test data.\n"); |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13449 | return false; |
| 13450 | } |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13451 | |
| 13452 | static ConstString opcode_key ("opcode"); |
| 13453 | static ConstString before_key ("before_state"); |
| 13454 | static ConstString after_key ("after_state"); |
| 13455 | |
| 13456 | OptionValueSP value_sp = test_data->GetValueForKey (opcode_key); |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13457 | |
| 13458 | uint32_t test_opcode; |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13459 | if ((value_sp.get() == NULL) || (value_sp->GetType() != OptionValue::eTypeUInt64)) |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13460 | { |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13461 | out_stream->Printf ("TestEmulation: Error reading opcode from test file.\n"); |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13462 | return false; |
| 13463 | } |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13464 | test_opcode = value_sp->GetUInt64Value (); |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13465 | |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13466 | if (arch.GetTriple().getArch() == llvm::Triple::arm) |
| 13467 | { |
| 13468 | m_opcode_mode = eModeARM; |
| 13469 | m_opcode.SetOpcode32 (test_opcode); |
| 13470 | } |
| 13471 | else if (arch.GetTriple().getArch() == llvm::Triple::thumb) |
| 13472 | { |
| 13473 | m_opcode_mode = eModeThumb; |
| 13474 | if (test_opcode < 0x10000) |
| 13475 | m_opcode.SetOpcode16 (test_opcode); |
| 13476 | else |
| 13477 | m_opcode.SetOpcode32 (test_opcode); |
| 13478 | |
| 13479 | } |
| 13480 | else |
| 13481 | { |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13482 | out_stream->Printf ("TestEmulation: Invalid arch.\n"); |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13483 | return false; |
| 13484 | } |
| 13485 | |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13486 | EmulationStateARM before_state; |
| 13487 | EmulationStateARM after_state; |
| 13488 | |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13489 | value_sp = test_data->GetValueForKey (before_key); |
| 13490 | if ((value_sp.get() == NULL) || (value_sp->GetType() != OptionValue::eTypeDictionary)) |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13491 | { |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13492 | out_stream->Printf ("TestEmulation: Failed to find 'before' state.\n"); |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13493 | return false; |
| 13494 | } |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13495 | |
Greg Clayton | 57b3c6b | 2011-04-27 22:04:39 +0000 | [diff] [blame] | 13496 | OptionValueDictionary *state_dictionary = value_sp->GetAsDictionary (); |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13497 | if (!before_state.LoadStateFromDictionary (state_dictionary)) |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13498 | { |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13499 | out_stream->Printf ("TestEmulation: Failed loading 'before' state.\n"); |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13500 | return false; |
| 13501 | } |
| 13502 | |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13503 | value_sp = test_data->GetValueForKey (after_key); |
| 13504 | if ((value_sp.get() == NULL) || (value_sp->GetType() != OptionValue::eTypeDictionary)) |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13505 | { |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13506 | out_stream->Printf ("TestEmulation: Failed to find 'after' state.\n"); |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13507 | return false; |
| 13508 | } |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13509 | |
Greg Clayton | 57b3c6b | 2011-04-27 22:04:39 +0000 | [diff] [blame] | 13510 | state_dictionary = value_sp->GetAsDictionary (); |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13511 | if (!after_state.LoadStateFromDictionary (state_dictionary)) |
| 13512 | { |
| 13513 | out_stream->Printf ("TestEmulation: Failed loading 'after' state.\n"); |
| 13514 | return false; |
| 13515 | } |
| 13516 | |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13517 | SetBaton ((void *) &before_state); |
| 13518 | SetCallbacks (&EmulationStateARM::ReadPseudoMemory, |
| 13519 | &EmulationStateARM::WritePseudoMemory, |
| 13520 | &EmulationStateARM::ReadPseudoRegister, |
| 13521 | &EmulationStateARM::WritePseudoRegister); |
| 13522 | |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 13523 | bool success = EvaluateInstruction (eEmulateInstructionOptionAutoAdvancePC); |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13524 | if (!success) |
| 13525 | { |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13526 | out_stream->Printf ("TestEmulation: EvaluateInstruction() failed.\n"); |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13527 | return false; |
| 13528 | } |
| 13529 | |
| 13530 | success = before_state.CompareState (after_state); |
Caroline Tice | dfb2e20 | 2011-04-22 05:08:45 +0000 | [diff] [blame] | 13531 | if (!success) |
| 13532 | out_stream->Printf ("TestEmulation: 'before' and 'after' states do not match.\n"); |
| 13533 | |
Caroline Tice | 6b8d3b5 | 2011-04-19 23:30:03 +0000 | [diff] [blame] | 13534 | return success; |
| 13535 | } |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 13536 | // |
| 13537 | // |
| 13538 | //const char * |
| 13539 | //EmulateInstructionARM::GetRegisterName (uint32_t reg_kind, uint32_t reg_num) |
| 13540 | //{ |
| 13541 | // if (reg_kind == eRegisterKindGeneric) |
| 13542 | // { |
| 13543 | // switch (reg_num) |
| 13544 | // { |
| 13545 | // case LLDB_REGNUM_GENERIC_PC: return "pc"; |
| 13546 | // case LLDB_REGNUM_GENERIC_SP: return "sp"; |
| 13547 | // case LLDB_REGNUM_GENERIC_FP: return "fp"; |
| 13548 | // case LLDB_REGNUM_GENERIC_RA: return "lr"; |
| 13549 | // case LLDB_REGNUM_GENERIC_FLAGS: return "cpsr"; |
| 13550 | // default: return NULL; |
| 13551 | // } |
| 13552 | // } |
| 13553 | // else if (reg_kind == eRegisterKindDWARF) |
| 13554 | // { |
| 13555 | // return GetARMDWARFRegisterName (reg_num); |
| 13556 | // } |
| 13557 | // return NULL; |
| 13558 | //} |
| 13559 | // |
| 13560 | bool |
| 13561 | EmulateInstructionARM::CreateFunctionEntryUnwind (UnwindPlan &unwind_plan) |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 13562 | { |
Greg Clayton | 75906e4 | 2011-05-11 18:39:18 +0000 | [diff] [blame] | 13563 | unwind_plan.Clear(); |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 13564 | unwind_plan.SetRegisterKind (eRegisterKindDWARF); |
| 13565 | |
| 13566 | UnwindPlan::Row row; |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 13567 | |
| 13568 | // Our previous Call Frame Address is the stack pointer |
| 13569 | row.SetCFARegister (dwarf_sp); |
| 13570 | |
| 13571 | // Our previous PC is in the LR |
Greg Clayton | 75906e4 | 2011-05-11 18:39:18 +0000 | [diff] [blame] | 13572 | row.SetRegisterLocationToRegister(dwarf_pc, dwarf_lr, true); |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 13573 | unwind_plan.AppendRow (row); |
| 13574 | |
| 13575 | // All other registers are the same. |
| 13576 | |
| 13577 | unwind_plan.SetSourceName ("EmulateInstructionARM"); |
| 13578 | return true; |
Greg Clayton | 888a733 | 2011-04-26 04:39:08 +0000 | [diff] [blame] | 13579 | } |
| 13580 | |
Greg Clayton | c07d451 | 2011-04-26 23:48:45 +0000 | [diff] [blame] | 13581 | |
| 13582 | |
| 13583 | |