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" |
Greg Clayton | 395fc33 | 2011-02-15 21:59:32 +0000 | [diff] [blame] | 13 | #include "lldb/Core/ArchSpec.h" |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 14 | #include "lldb/Core/Address.h" |
Greg Clayton | 8482ded | 2011-02-01 00:04:43 +0000 | [diff] [blame] | 15 | #include "lldb/Core/ConstString.h" |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 16 | #include "lldb/Core/PluginManager.h" |
Greg Clayton | 8482ded | 2011-02-01 00:04:43 +0000 | [diff] [blame] | 17 | |
Greg Clayton | f29a08f | 2011-02-09 17:41:27 +0000 | [diff] [blame] | 18 | #include "Plugins/Process/Utility/ARMDefines.h" |
| 19 | #include "Plugins/Process/Utility/ARMUtils.h" |
| 20 | #include "Utility/ARM_DWARF_Registers.h" |
| 21 | |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 22 | #include "llvm/Support/MathExtras.h" // for SignExtend32 template function |
Johnny Chen | 9307047 | 2011-02-04 23:02:47 +0000 | [diff] [blame] | 23 | // and CountTrailingZeros_32 function |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 24 | |
| 25 | using namespace lldb; |
| 26 | using namespace lldb_private; |
| 27 | |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 28 | // Convenient macro definitions. |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 29 | #define APSR_C Bit32(m_opcode_cpsr, CPSR_C_POS) |
| 30 | #define APSR_V Bit32(m_opcode_cpsr, CPSR_V_POS) |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 31 | |
Caroline Tice | f55261f | 2011-02-18 22:24:22 +0000 | [diff] [blame] | 32 | #define AlignPC(pc_val) (pc_val & 0xFFFFFFFC) |
| 33 | |
Johnny Chen | 0e00af2 | 2011-02-10 19:40:42 +0000 | [diff] [blame] | 34 | //---------------------------------------------------------------------- |
| 35 | // |
| 36 | // ITSession implementation |
| 37 | // |
| 38 | //---------------------------------------------------------------------- |
| 39 | |
Johnny Chen | 9307047 | 2011-02-04 23:02:47 +0000 | [diff] [blame] | 40 | // A8.6.50 |
| 41 | // Valid return values are {1, 2, 3, 4}, with 0 signifying an error condition. |
| 42 | static unsigned short CountITSize(unsigned ITMask) { |
| 43 | // First count the trailing zeros of the IT mask. |
| 44 | unsigned TZ = llvm::CountTrailingZeros_32(ITMask); |
| 45 | if (TZ > 3) |
| 46 | { |
| 47 | printf("Encoding error: IT Mask '0000'\n"); |
| 48 | return 0; |
| 49 | } |
| 50 | return (4 - TZ); |
| 51 | } |
| 52 | |
| 53 | // Init ITState. Note that at least one bit is always 1 in mask. |
| 54 | bool ITSession::InitIT(unsigned short bits7_0) |
| 55 | { |
| 56 | ITCounter = CountITSize(Bits32(bits7_0, 3, 0)); |
| 57 | if (ITCounter == 0) |
| 58 | return false; |
| 59 | |
| 60 | // A8.6.50 IT |
| 61 | unsigned short FirstCond = Bits32(bits7_0, 7, 4); |
| 62 | if (FirstCond == 0xF) |
| 63 | { |
| 64 | printf("Encoding error: IT FirstCond '1111'\n"); |
| 65 | return false; |
| 66 | } |
| 67 | if (FirstCond == 0xE && ITCounter != 1) |
| 68 | { |
| 69 | printf("Encoding error: IT FirstCond '1110' && Mask != '1000'\n"); |
| 70 | return false; |
| 71 | } |
| 72 | |
| 73 | ITState = bits7_0; |
| 74 | return true; |
| 75 | } |
| 76 | |
| 77 | // Update ITState if necessary. |
| 78 | void ITSession::ITAdvance() |
| 79 | { |
| 80 | assert(ITCounter); |
| 81 | --ITCounter; |
| 82 | if (ITCounter == 0) |
| 83 | ITState = 0; |
| 84 | else |
| 85 | { |
| 86 | unsigned short NewITState4_0 = Bits32(ITState, 4, 0) << 1; |
| 87 | SetBits32(ITState, 4, 0, NewITState4_0); |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | // Return true if we're inside an IT Block. |
| 92 | bool ITSession::InITBlock() |
| 93 | { |
| 94 | return ITCounter != 0; |
| 95 | } |
| 96 | |
Johnny Chen | c315f86 | 2011-02-05 00:46:10 +0000 | [diff] [blame] | 97 | // Return true if we're the last instruction inside an IT Block. |
| 98 | bool ITSession::LastInITBlock() |
| 99 | { |
| 100 | return ITCounter == 1; |
| 101 | } |
| 102 | |
Johnny Chen | 9307047 | 2011-02-04 23:02:47 +0000 | [diff] [blame] | 103 | // Get condition bits for the current thumb instruction. |
| 104 | uint32_t ITSession::GetCond() |
| 105 | { |
Johnny Chen | c315f86 | 2011-02-05 00:46:10 +0000 | [diff] [blame] | 106 | if (InITBlock()) |
| 107 | return Bits32(ITState, 7, 4); |
| 108 | else |
| 109 | return COND_AL; |
Johnny Chen | 9307047 | 2011-02-04 23:02:47 +0000 | [diff] [blame] | 110 | } |
| 111 | |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 112 | // ARM constants used during decoding |
| 113 | #define REG_RD 0 |
| 114 | #define LDM_REGLIST 1 |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 115 | #define SP_REG 13 |
| 116 | #define LR_REG 14 |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 117 | #define PC_REG 15 |
| 118 | #define PC_REGLIST_BIT 0x8000 |
| 119 | |
Johnny Chen | 251af6a | 2011-01-21 22:47:25 +0000 | [diff] [blame] | 120 | #define ARMv4 (1u << 0) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 121 | #define ARMv4T (1u << 1) |
| 122 | #define ARMv5T (1u << 2) |
| 123 | #define ARMv5TE (1u << 3) |
| 124 | #define ARMv5TEJ (1u << 4) |
Johnny Chen | 251af6a | 2011-01-21 22:47:25 +0000 | [diff] [blame] | 125 | #define ARMv6 (1u << 5) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 126 | #define ARMv6K (1u << 6) |
| 127 | #define ARMv6T2 (1u << 7) |
Johnny Chen | 251af6a | 2011-01-21 22:47:25 +0000 | [diff] [blame] | 128 | #define ARMv7 (1u << 8) |
Johnny Chen | 60c0d62 | 2011-01-25 23:49:39 +0000 | [diff] [blame] | 129 | #define ARMv8 (1u << 9) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 130 | #define ARMvAll (0xffffffffu) |
| 131 | |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 132 | #define ARMV4T_ABOVE (ARMv4T|ARMv5T|ARMv5TE|ARMv5TEJ|ARMv6|ARMv6K|ARMv6T2|ARMv7|ARMv8) |
| 133 | #define ARMV5_ABOVE (ARMv5T|ARMv5TE|ARMv5TEJ|ARMv6|ARMv6K|ARMv6T2|ARMv7|ARMv8) |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 134 | #define ARMV5TE_ABOVE (ARMv5TE|ARMv5TEJ|ARMv6|ARMv6K|ARMv6T2|ARMv7|ARMv8) |
Johnny Chen | 59e6ab7 | 2011-02-24 21:01:20 +0000 | [diff] [blame] | 135 | #define ARMV5J_ABOVE (ARMv5TEJ|ARMv6|ARMv6K|ARMv6T2|ARMv7|ARMv8) |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 136 | #define ARMV6_ABOVE (ARMv6|ARMv6K|ARMv6T2|ARMv7|ARMv8) |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 137 | #define ARMV6T2_ABOVE (ARMv6T2|ARMv7|ARMv8) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 138 | |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 139 | #define No_VFP 0 |
| 140 | #define VFPv1 (1u << 1) |
| 141 | #define VFPv2 (1u << 2) |
| 142 | #define VFPv3 (1u << 3) |
| 143 | #define AdvancedSIMD (1u << 4) |
| 144 | |
| 145 | #define VFPv1_ABOVE (VFPv1 | VFPv2 | VFPv3 | AdvancedSIMD) |
| 146 | #define VFPv2_ABOVE (VFPv2 | VFPv3 | AdvancedSIMD) |
| 147 | #define VFPv2v3 (VFPv2 | VFPv3) |
| 148 | |
Johnny Chen | 0e00af2 | 2011-02-10 19:40:42 +0000 | [diff] [blame] | 149 | //---------------------------------------------------------------------- |
| 150 | // |
| 151 | // EmulateInstructionARM implementation |
| 152 | // |
| 153 | //---------------------------------------------------------------------- |
| 154 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 155 | void |
| 156 | EmulateInstructionARM::Initialize () |
Johnny Chen | 7dc60e1 | 2011-01-24 19:46:32 +0000 | [diff] [blame] | 157 | { |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 158 | PluginManager::RegisterPlugin (GetPluginNameStatic (), |
| 159 | GetPluginDescriptionStatic (), |
| 160 | CreateInstance); |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 161 | } |
Johnny Chen | 7dc60e1 | 2011-01-24 19:46:32 +0000 | [diff] [blame] | 162 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 163 | void |
| 164 | EmulateInstructionARM::Terminate () |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 165 | { |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 166 | PluginManager::UnregisterPlugin (CreateInstance); |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 167 | } |
| 168 | |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 169 | const char * |
| 170 | EmulateInstructionARM::GetPluginNameStatic () |
| 171 | { |
| 172 | return "lldb.emulate-instruction.arm"; |
| 173 | } |
| 174 | |
| 175 | const char * |
| 176 | EmulateInstructionARM::GetPluginDescriptionStatic () |
| 177 | { |
| 178 | return "Emulate instructions for the ARM architecture."; |
| 179 | } |
| 180 | |
| 181 | EmulateInstruction * |
| 182 | EmulateInstructionARM::CreateInstance (const ArchSpec &arch) |
| 183 | { |
| 184 | if (arch.GetTriple().getArch() == llvm::Triple::arm) |
| 185 | { |
| 186 | std::auto_ptr<EmulateInstructionARM> emulate_insn_ap (new EmulateInstructionARM (arch)); |
| 187 | |
| 188 | if (emulate_insn_ap.get()) |
| 189 | return emulate_insn_ap.release(); |
| 190 | } |
| 191 | else if (arch.GetTriple().getArch() == llvm::Triple::thumb) |
| 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 | |
| 199 | return NULL; |
| 200 | } |
| 201 | |
| 202 | bool |
| 203 | EmulateInstructionARM::SetTargetTriple (const ArchSpec &arch) |
| 204 | { |
| 205 | if (arch.GetTriple().getArch () == llvm::Triple::arm) |
| 206 | return true; |
| 207 | else if (arch.GetTriple().getArch () == llvm::Triple::thumb) |
| 208 | return true; |
| 209 | |
| 210 | return false; |
| 211 | } |
| 212 | |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 213 | // Write "bits (32) UNKNOWN" to memory address "address". Helper function for many ARM instructions. |
| 214 | bool |
| 215 | EmulateInstructionARM::WriteBits32UnknownToMemory (addr_t address) |
| 216 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 217 | EmulateInstruction::Context context; |
| 218 | context.type = EmulateInstruction::eContextWriteMemoryRandomBits; |
| 219 | context.SetNoArgs (); |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 220 | |
| 221 | uint32_t random_data = rand (); |
| 222 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 223 | |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 224 | if (!MemAWrite (context, address, random_data, addr_byte_size)) |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 225 | return false; |
| 226 | |
| 227 | return true; |
| 228 | } |
| 229 | |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 230 | // Write "bits (32) UNKNOWN" to register n. Helper function for many ARM instructions. |
| 231 | bool |
| 232 | EmulateInstructionARM::WriteBits32Unknown (int n) |
| 233 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 234 | EmulateInstruction::Context context; |
| 235 | context.type = EmulateInstruction::eContextWriteRegisterRandomBits; |
| 236 | context.SetNoArgs (); |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 237 | |
Johnny Chen | 62ff6f5 | 2011-02-11 18:11:22 +0000 | [diff] [blame] | 238 | bool success; |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 239 | uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 240 | |
| 241 | if (!success) |
| 242 | return false; |
| 243 | |
| 244 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, data)) |
| 245 | return false; |
| 246 | |
| 247 | return true; |
| 248 | } |
| 249 | |
Johnny Chen | 08c25e8 | 2011-01-31 18:02:28 +0000 | [diff] [blame] | 250 | // Push Multiple Registers stores multiple registers to the stack, storing to |
| 251 | // consecutive memory locations ending just below the address in SP, and updates |
| 252 | // SP to point to the start of the stored data. |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 253 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 254 | EmulateInstructionARM::EmulatePUSH (const uint32_t opcode, const ARMEncoding encoding) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 255 | { |
| 256 | #if 0 |
| 257 | // ARM pseudo code... |
| 258 | if (ConditionPassed()) |
| 259 | { |
| 260 | EncodingSpecificOperations(); |
| 261 | NullCheckIfThumbEE(13); |
| 262 | address = SP - 4*BitCount(registers); |
| 263 | |
| 264 | for (i = 0 to 14) |
| 265 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 266 | if (registers<i> == '1') |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 267 | { |
| 268 | if i == 13 && i != LowestSetBit(registers) // Only possible for encoding A1 |
| 269 | MemA[address,4] = bits(32) UNKNOWN; |
| 270 | else |
| 271 | MemA[address,4] = R[i]; |
| 272 | address = address + 4; |
| 273 | } |
| 274 | } |
| 275 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 276 | if (registers<15> == '1') // Only possible for encoding A1 or A2 |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 277 | MemA[address,4] = PCStoreValue(); |
| 278 | |
| 279 | SP = SP - 4*BitCount(registers); |
| 280 | } |
| 281 | #endif |
| 282 | |
| 283 | bool success = false; |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 284 | if (ConditionPassed(opcode)) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 285 | { |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 286 | const uint32_t addr_byte_size = GetAddressByteSize(); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 287 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 288 | if (!success) |
| 289 | return false; |
Johnny Chen | 3c75c76 | 2011-01-22 00:47:08 +0000 | [diff] [blame] | 290 | uint32_t registers = 0; |
Johnny Chen | 91d9986 | 2011-01-25 19:07:04 +0000 | [diff] [blame] | 291 | uint32_t Rt; // the source register |
Johnny Chen | 3c75c76 | 2011-01-22 00:47:08 +0000 | [diff] [blame] | 292 | switch (encoding) { |
Johnny Chen | aedde1c | 2011-01-24 20:38:45 +0000 | [diff] [blame] | 293 | case eEncodingT1: |
Johnny Chen | 108d5aa | 2011-01-26 01:00:55 +0000 | [diff] [blame] | 294 | registers = Bits32(opcode, 7, 0); |
Johnny Chen | aedde1c | 2011-01-24 20:38:45 +0000 | [diff] [blame] | 295 | // The M bit represents LR. |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 296 | if (Bit32(opcode, 8)) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 297 | registers |= (1u << 14); |
Johnny Chen | aedde1c | 2011-01-24 20:38:45 +0000 | [diff] [blame] | 298 | // if BitCount(registers) < 1 then UNPREDICTABLE; |
| 299 | if (BitCount(registers) < 1) |
| 300 | return false; |
| 301 | break; |
Johnny Chen | 7dc60e1 | 2011-01-24 19:46:32 +0000 | [diff] [blame] | 302 | case eEncodingT2: |
| 303 | // Ignore bits 15 & 13. |
Johnny Chen | 108d5aa | 2011-01-26 01:00:55 +0000 | [diff] [blame] | 304 | registers = Bits32(opcode, 15, 0) & ~0xa000; |
Johnny Chen | 7dc60e1 | 2011-01-24 19:46:32 +0000 | [diff] [blame] | 305 | // if BitCount(registers) < 2 then UNPREDICTABLE; |
| 306 | if (BitCount(registers) < 2) |
| 307 | return false; |
| 308 | break; |
| 309 | case eEncodingT3: |
Johnny Chen | 108d5aa | 2011-01-26 01:00:55 +0000 | [diff] [blame] | 310 | Rt = Bits32(opcode, 15, 12); |
Johnny Chen | 7dc60e1 | 2011-01-24 19:46:32 +0000 | [diff] [blame] | 311 | // if BadReg(t) then UNPREDICTABLE; |
Johnny Chen | 91d9986 | 2011-01-25 19:07:04 +0000 | [diff] [blame] | 312 | if (BadReg(Rt)) |
Johnny Chen | 7dc60e1 | 2011-01-24 19:46:32 +0000 | [diff] [blame] | 313 | return false; |
Johnny Chen | 91d9986 | 2011-01-25 19:07:04 +0000 | [diff] [blame] | 314 | registers = (1u << Rt); |
Johnny Chen | 7dc60e1 | 2011-01-24 19:46:32 +0000 | [diff] [blame] | 315 | break; |
Johnny Chen | 3c75c76 | 2011-01-22 00:47:08 +0000 | [diff] [blame] | 316 | case eEncodingA1: |
Johnny Chen | 108d5aa | 2011-01-26 01:00:55 +0000 | [diff] [blame] | 317 | registers = Bits32(opcode, 15, 0); |
Johnny Chen | a33d484 | 2011-01-24 22:25:48 +0000 | [diff] [blame] | 318 | // Instead of return false, let's handle the following case as well, |
| 319 | // which amounts to pushing one reg onto the full descending stacks. |
| 320 | // if BitCount(register_list) < 2 then SEE STMDB / STMFD; |
Johnny Chen | 3c75c76 | 2011-01-22 00:47:08 +0000 | [diff] [blame] | 321 | break; |
| 322 | case eEncodingA2: |
Johnny Chen | 108d5aa | 2011-01-26 01:00:55 +0000 | [diff] [blame] | 323 | Rt = Bits32(opcode, 15, 12); |
Johnny Chen | 7dc60e1 | 2011-01-24 19:46:32 +0000 | [diff] [blame] | 324 | // if t == 13 then UNPREDICTABLE; |
Johnny Chen | 91d9986 | 2011-01-25 19:07:04 +0000 | [diff] [blame] | 325 | if (Rt == dwarf_sp) |
Johnny Chen | 3c75c76 | 2011-01-22 00:47:08 +0000 | [diff] [blame] | 326 | return false; |
Johnny Chen | 91d9986 | 2011-01-25 19:07:04 +0000 | [diff] [blame] | 327 | registers = (1u << Rt); |
Johnny Chen | 3c75c76 | 2011-01-22 00:47:08 +0000 | [diff] [blame] | 328 | break; |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 329 | default: |
| 330 | return false; |
Johnny Chen | 3c75c76 | 2011-01-22 00:47:08 +0000 | [diff] [blame] | 331 | } |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 332 | addr_t sp_offset = addr_byte_size * BitCount (registers); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 333 | addr_t addr = sp - sp_offset; |
| 334 | uint32_t i; |
| 335 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 336 | EmulateInstruction::Context context; |
| 337 | context.type = EmulateInstruction::eContextPushRegisterOnStack; |
| 338 | Register dwarf_reg; |
| 339 | dwarf_reg.SetRegister (eRegisterKindDWARF, 0); |
Caroline Tice | 2b03ed8 | 2011-03-16 00:06:12 +0000 | [diff] [blame] | 340 | Register sp_reg; |
| 341 | sp_reg.SetRegister (eRegisterKindDWARF, dwarf_sp); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 342 | for (i=0; i<15; ++i) |
| 343 | { |
Johnny Chen | 7c1bf92 | 2011-02-08 23:49:37 +0000 | [diff] [blame] | 344 | if (BitIsSet (registers, i)) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 345 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 346 | dwarf_reg.num = dwarf_r0 + i; |
Caroline Tice | 2b03ed8 | 2011-03-16 00:06:12 +0000 | [diff] [blame] | 347 | context.SetRegisterToRegisterPlusOffset (dwarf_reg, sp_reg, addr - sp); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 348 | uint32_t reg_value = ReadCoreReg(i, &success); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 349 | if (!success) |
| 350 | return false; |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 351 | if (!MemAWrite (context, addr, reg_value, addr_byte_size)) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 352 | return false; |
| 353 | addr += addr_byte_size; |
| 354 | } |
| 355 | } |
| 356 | |
Johnny Chen | 7c1bf92 | 2011-02-08 23:49:37 +0000 | [diff] [blame] | 357 | if (BitIsSet (registers, 15)) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 358 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 359 | dwarf_reg.num = dwarf_pc; |
| 360 | context.SetRegisterPlusOffset (dwarf_reg, addr - sp); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 361 | const uint32_t pc = ReadCoreReg(PC_REG, &success); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 362 | if (!success) |
| 363 | return false; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 364 | if (!MemAWrite (context, addr, pc, addr_byte_size)) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 365 | return false; |
| 366 | } |
| 367 | |
| 368 | context.type = EmulateInstruction::eContextAdjustStackPointer; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 369 | context.SetImmediateSigned (-sp_offset); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 370 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 371 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP, sp - sp_offset)) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 372 | return false; |
| 373 | } |
| 374 | return true; |
| 375 | } |
| 376 | |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 377 | // Pop Multiple Registers loads multiple registers from the stack, loading from |
| 378 | // consecutive memory locations staring at the address in SP, and updates |
| 379 | // SP to point just above the loaded data. |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 380 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 381 | EmulateInstructionARM::EmulatePOP (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 382 | { |
| 383 | #if 0 |
| 384 | // ARM pseudo code... |
| 385 | if (ConditionPassed()) |
| 386 | { |
| 387 | EncodingSpecificOperations(); NullCheckIfThumbEE(13); |
| 388 | address = SP; |
| 389 | for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 390 | if registers<i> == '1' then |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 391 | 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] | 392 | if registers<15> == '1' then |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 393 | if UnalignedAllowed then |
| 394 | LoadWritePC(MemU[address,4]); |
| 395 | else |
| 396 | LoadWritePC(MemA[address,4]); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 397 | if registers<13> == '0' then SP = SP + 4*BitCount(registers); |
| 398 | if registers<13> == '1' then SP = bits(32) UNKNOWN; |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 399 | } |
| 400 | #endif |
| 401 | |
| 402 | bool success = false; |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 403 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 404 | if (ConditionPassed(opcode)) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 405 | { |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 406 | const uint32_t addr_byte_size = GetAddressByteSize(); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 407 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 408 | if (!success) |
| 409 | return false; |
| 410 | uint32_t registers = 0; |
| 411 | uint32_t Rt; // the destination register |
| 412 | switch (encoding) { |
| 413 | case eEncodingT1: |
| 414 | registers = Bits32(opcode, 7, 0); |
| 415 | // The P bit represents PC. |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 416 | if (Bit32(opcode, 8)) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 417 | registers |= (1u << 15); |
| 418 | // if BitCount(registers) < 1 then UNPREDICTABLE; |
| 419 | if (BitCount(registers) < 1) |
| 420 | return false; |
| 421 | break; |
| 422 | case eEncodingT2: |
| 423 | // Ignore bit 13. |
| 424 | registers = Bits32(opcode, 15, 0) & ~0x2000; |
| 425 | // if BitCount(registers) < 2 || (P == '1' && M == '1') then UNPREDICTABLE; |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 426 | if (BitCount(registers) < 2 || (Bit32(opcode, 15) && Bit32(opcode, 14))) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 427 | return false; |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 428 | // if registers<15> == '1' && InITBlock() && !LastInITBlock() then UNPREDICTABLE; |
| 429 | if (BitIsSet(registers, 15) && InITBlock() && !LastInITBlock()) |
| 430 | return false; |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 431 | break; |
| 432 | case eEncodingT3: |
| 433 | Rt = Bits32(opcode, 15, 12); |
| 434 | // if t == 13 || (t == 15 && InITBlock() && !LastInITBlock()) then UNPREDICTABLE; |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 435 | if (Rt == 13) |
| 436 | return false; |
| 437 | if (Rt == 15 && InITBlock() && !LastInITBlock()) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 438 | return false; |
| 439 | registers = (1u << Rt); |
| 440 | break; |
| 441 | case eEncodingA1: |
| 442 | registers = Bits32(opcode, 15, 0); |
| 443 | // Instead of return false, let's handle the following case as well, |
| 444 | // which amounts to popping one reg from the full descending stacks. |
| 445 | // if BitCount(register_list) < 2 then SEE LDM / LDMIA / LDMFD; |
| 446 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 447 | // if registers<13> == '1' && ArchVersion() >= 7 then UNPREDICTABLE; |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 448 | if (BitIsSet(opcode, 13) && ArchVersion() >= ARMv7) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 449 | return false; |
| 450 | break; |
| 451 | case eEncodingA2: |
| 452 | Rt = Bits32(opcode, 15, 12); |
| 453 | // if t == 13 then UNPREDICTABLE; |
| 454 | if (Rt == dwarf_sp) |
| 455 | return false; |
| 456 | registers = (1u << Rt); |
| 457 | break; |
| 458 | default: |
| 459 | return false; |
| 460 | } |
| 461 | addr_t sp_offset = addr_byte_size * BitCount (registers); |
| 462 | addr_t addr = sp; |
| 463 | uint32_t i, data; |
| 464 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 465 | EmulateInstruction::Context context; |
| 466 | context.type = EmulateInstruction::eContextPopRegisterOffStack; |
| 467 | Register dwarf_reg; |
| 468 | dwarf_reg.SetRegister (eRegisterKindDWARF, 0); |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 469 | Register sp_reg; |
| 470 | sp_reg.SetRegister (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP); |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 471 | for (i=0; i<15; ++i) |
| 472 | { |
Johnny Chen | 7c1bf92 | 2011-02-08 23:49:37 +0000 | [diff] [blame] | 473 | if (BitIsSet (registers, i)) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 474 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 475 | dwarf_reg.num = dwarf_r0 + i; |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 476 | context.SetRegisterPlusOffset (sp_reg, addr - sp); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 477 | data = MemARead(context, addr, 4, 0, &success); |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 478 | if (!success) |
| 479 | return false; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 480 | if (!WriteRegisterUnsigned(context, eRegisterKindDWARF, dwarf_reg.num, data)) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 481 | return false; |
| 482 | addr += addr_byte_size; |
| 483 | } |
| 484 | } |
| 485 | |
Johnny Chen | 7c1bf92 | 2011-02-08 23:49:37 +0000 | [diff] [blame] | 486 | if (BitIsSet (registers, 15)) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 487 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 488 | dwarf_reg.num = dwarf_pc; |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 489 | context.SetRegisterPlusOffset (sp_reg, addr - sp); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 490 | data = MemARead(context, addr, 4, 0, &success); |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 491 | if (!success) |
| 492 | return false; |
Johnny Chen | f3eaacf | 2011-02-09 19:30:49 +0000 | [diff] [blame] | 493 | // In ARMv5T and above, this is an interworking branch. |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 494 | if (!LoadWritePC(context, data)) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 495 | return false; |
| 496 | addr += addr_byte_size; |
| 497 | } |
| 498 | |
| 499 | context.type = EmulateInstruction::eContextAdjustStackPointer; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 500 | context.SetImmediateSigned (sp_offset); |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 501 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 502 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP, sp + sp_offset)) |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 503 | return false; |
| 504 | } |
| 505 | return true; |
| 506 | } |
| 507 | |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 508 | // 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] | 509 | // ADD (SP plus immediate) |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 510 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 511 | EmulateInstructionARM::EmulateADDRdSPImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 512 | { |
| 513 | #if 0 |
| 514 | // ARM pseudo code... |
| 515 | if (ConditionPassed()) |
| 516 | { |
| 517 | EncodingSpecificOperations(); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 518 | (result, carry, overflow) = AddWithCarry(SP, imm32, '0'); |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 519 | if d == 15 then |
| 520 | ALUWritePC(result); // setflags is always FALSE here |
| 521 | else |
| 522 | R[d] = result; |
| 523 | if setflags then |
| 524 | APSR.N = result<31>; |
| 525 | APSR.Z = IsZeroBit(result); |
| 526 | APSR.C = carry; |
| 527 | APSR.V = overflow; |
| 528 | } |
| 529 | #endif |
| 530 | |
| 531 | bool success = false; |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 532 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 533 | if (ConditionPassed(opcode)) |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 534 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 535 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 536 | if (!success) |
| 537 | return false; |
| 538 | uint32_t Rd; // the destination register |
| 539 | uint32_t imm32; |
| 540 | switch (encoding) { |
| 541 | case eEncodingT1: |
| 542 | Rd = 7; |
| 543 | imm32 = Bits32(opcode, 7, 0) << 2; // imm32 = ZeroExtend(imm8:'00', 32) |
| 544 | break; |
| 545 | case eEncodingA1: |
| 546 | Rd = Bits32(opcode, 15, 12); |
| 547 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
| 548 | break; |
| 549 | default: |
| 550 | return false; |
| 551 | } |
| 552 | addr_t sp_offset = imm32; |
| 553 | addr_t addr = sp + sp_offset; // a pointer to the stack area |
| 554 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 555 | EmulateInstruction::Context context; |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 556 | context.type = EmulateInstruction::eContextAdjustStackPointer; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 557 | Register sp_reg; |
| 558 | sp_reg.SetRegister (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP); |
| 559 | context.SetRegisterPlusOffset (sp_reg, sp_offset); |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 560 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 561 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + Rd, addr)) |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 562 | return false; |
| 563 | } |
| 564 | return true; |
| 565 | } |
| 566 | |
Johnny Chen | 2ccad83 | 2011-01-28 19:57:25 +0000 | [diff] [blame] | 567 | // Set r7 or ip to the current stack pointer. |
| 568 | // MOV (register) |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 569 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 570 | EmulateInstructionARM::EmulateMOVRdSP (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 2ccad83 | 2011-01-28 19:57:25 +0000 | [diff] [blame] | 571 | { |
| 572 | #if 0 |
| 573 | // ARM pseudo code... |
| 574 | if (ConditionPassed()) |
| 575 | { |
| 576 | EncodingSpecificOperations(); |
| 577 | result = R[m]; |
| 578 | if d == 15 then |
| 579 | ALUWritePC(result); // setflags is always FALSE here |
| 580 | else |
| 581 | R[d] = result; |
| 582 | if setflags then |
| 583 | APSR.N = result<31>; |
| 584 | APSR.Z = IsZeroBit(result); |
| 585 | // APSR.C unchanged |
| 586 | // APSR.V unchanged |
| 587 | } |
| 588 | #endif |
| 589 | |
| 590 | bool success = false; |
Johnny Chen | 2ccad83 | 2011-01-28 19:57:25 +0000 | [diff] [blame] | 591 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 592 | if (ConditionPassed(opcode)) |
Johnny Chen | 2ccad83 | 2011-01-28 19:57:25 +0000 | [diff] [blame] | 593 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 594 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | 2ccad83 | 2011-01-28 19:57:25 +0000 | [diff] [blame] | 595 | if (!success) |
| 596 | return false; |
| 597 | uint32_t Rd; // the destination register |
| 598 | switch (encoding) { |
| 599 | case eEncodingT1: |
| 600 | Rd = 7; |
| 601 | break; |
| 602 | case eEncodingA1: |
| 603 | Rd = 12; |
| 604 | break; |
| 605 | default: |
| 606 | return false; |
| 607 | } |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 608 | |
| 609 | EmulateInstruction::Context context; |
| 610 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
| 611 | Register sp_reg; |
| 612 | sp_reg.SetRegister (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP); |
| 613 | context.SetRegisterPlusOffset (sp_reg, 0); |
Johnny Chen | 2ccad83 | 2011-01-28 19:57:25 +0000 | [diff] [blame] | 614 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 615 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + Rd, sp)) |
Johnny Chen | 2ccad83 | 2011-01-28 19:57:25 +0000 | [diff] [blame] | 616 | return false; |
| 617 | } |
| 618 | return true; |
| 619 | } |
| 620 | |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 621 | // Move from high register (r8-r15) to low register (r0-r7). |
| 622 | // MOV (register) |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 623 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 624 | EmulateInstructionARM::EmulateMOVLowHigh (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 625 | { |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 626 | return EmulateMOVRdRm (opcode, encoding); |
Johnny Chen | 338bf54 | 2011-02-10 19:29:03 +0000 | [diff] [blame] | 627 | } |
| 628 | |
| 629 | // Move from register to register. |
| 630 | // MOV (register) |
| 631 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 632 | EmulateInstructionARM::EmulateMOVRdRm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 338bf54 | 2011-02-10 19:29:03 +0000 | [diff] [blame] | 633 | { |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 634 | #if 0 |
| 635 | // ARM pseudo code... |
| 636 | if (ConditionPassed()) |
| 637 | { |
| 638 | EncodingSpecificOperations(); |
| 639 | result = R[m]; |
| 640 | if d == 15 then |
| 641 | ALUWritePC(result); // setflags is always FALSE here |
| 642 | else |
| 643 | R[d] = result; |
| 644 | if setflags then |
| 645 | APSR.N = result<31>; |
| 646 | APSR.Z = IsZeroBit(result); |
| 647 | // APSR.C unchanged |
| 648 | // APSR.V unchanged |
| 649 | } |
| 650 | #endif |
| 651 | |
| 652 | bool success = false; |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 653 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 654 | if (ConditionPassed(opcode)) |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 655 | { |
| 656 | uint32_t Rm; // the source register |
| 657 | uint32_t Rd; // the destination register |
Johnny Chen | 338bf54 | 2011-02-10 19:29:03 +0000 | [diff] [blame] | 658 | bool setflags; |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 659 | switch (encoding) { |
| 660 | case eEncodingT1: |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 661 | Rd = Bit32(opcode, 7) << 3 | Bits32(opcode, 2, 0); |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 662 | Rm = Bits32(opcode, 6, 3); |
Johnny Chen | 338bf54 | 2011-02-10 19:29:03 +0000 | [diff] [blame] | 663 | setflags = false; |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 664 | if (Rd == 15 && InITBlock() && !LastInITBlock()) |
| 665 | return false; |
Johnny Chen | 338bf54 | 2011-02-10 19:29:03 +0000 | [diff] [blame] | 666 | break; |
| 667 | case eEncodingT2: |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 668 | Rd = Bits32(opcode, 2, 0); |
Johnny Chen | 338bf54 | 2011-02-10 19:29:03 +0000 | [diff] [blame] | 669 | Rm = Bits32(opcode, 5, 3); |
Johnny Chen | 338bf54 | 2011-02-10 19:29:03 +0000 | [diff] [blame] | 670 | setflags = true; |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 671 | if (InITBlock()) |
| 672 | return false; |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 673 | break; |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 674 | case eEncodingT3: |
| 675 | Rd = Bits32(opcode, 11, 8); |
| 676 | Rm = Bits32(opcode, 3, 0); |
| 677 | setflags = BitIsSet(opcode, 20); |
| 678 | // if setflags && (BadReg(d) || BadReg(m)) then UNPREDICTABLE; |
| 679 | if (setflags && (BadReg(Rd) || BadReg(Rm))) |
| 680 | return false; |
| 681 | // if !setflags && (d == 15 || m == 15 || (d == 13 && m == 13)) then UNPREDICTABLE; |
| 682 | if (!setflags && (Rd == 15 || Rm == 15 || (Rd == 13 && Rm == 13))) |
| 683 | return false; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 684 | break; |
Johnny Chen | 01d6157 | 2011-02-25 00:23:25 +0000 | [diff] [blame] | 685 | case eEncodingA1: |
| 686 | Rd = Bits32(opcode, 15, 12); |
| 687 | Rm = Bits32(opcode, 3, 0); |
| 688 | setflags = BitIsSet(opcode, 20); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 689 | |
Johnny Chen | 01d6157 | 2011-02-25 00:23:25 +0000 | [diff] [blame] | 690 | // 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] | 691 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 692 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 01d6157 | 2011-02-25 00:23:25 +0000 | [diff] [blame] | 693 | break; |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 694 | default: |
| 695 | return false; |
| 696 | } |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 697 | uint32_t result = ReadCoreReg(Rm, &success); |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 698 | if (!success) |
| 699 | return false; |
| 700 | |
| 701 | // The context specifies that Rm is to be moved into Rd. |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 702 | EmulateInstruction::Context context; |
Caroline Tice | 2b03ed8 | 2011-03-16 00:06:12 +0000 | [diff] [blame] | 703 | context.type = EmulateInstruction::eContextRegisterLoad; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 704 | Register dwarf_reg; |
| 705 | dwarf_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + Rm); |
Caroline Tice | 2b03ed8 | 2011-03-16 00:06:12 +0000 | [diff] [blame] | 706 | context.SetRegister (dwarf_reg); |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 707 | |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 708 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags)) |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 709 | return false; |
Johnny Chen | 1c13b62 | 2011-01-29 00:11:15 +0000 | [diff] [blame] | 710 | } |
| 711 | return true; |
| 712 | } |
| 713 | |
Johnny Chen | 357c30f | 2011-02-14 22:04:25 +0000 | [diff] [blame] | 714 | // Move (immediate) writes an immediate value to the destination register. It |
| 715 | // can optionally update the condition flags based on the value. |
| 716 | // MOV (immediate) |
| 717 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 718 | EmulateInstructionARM::EmulateMOVRdImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 357c30f | 2011-02-14 22:04:25 +0000 | [diff] [blame] | 719 | { |
| 720 | #if 0 |
| 721 | // ARM pseudo code... |
| 722 | if (ConditionPassed()) |
| 723 | { |
| 724 | EncodingSpecificOperations(); |
| 725 | result = imm32; |
| 726 | if d == 15 then // Can only occur for ARM encoding |
| 727 | ALUWritePC(result); // setflags is always FALSE here |
| 728 | else |
| 729 | R[d] = result; |
| 730 | if setflags then |
| 731 | APSR.N = result<31>; |
| 732 | APSR.Z = IsZeroBit(result); |
| 733 | APSR.C = carry; |
| 734 | // APSR.V unchanged |
| 735 | } |
| 736 | #endif |
Johnny Chen | 357c30f | 2011-02-14 22:04:25 +0000 | [diff] [blame] | 737 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 738 | if (ConditionPassed(opcode)) |
Johnny Chen | 357c30f | 2011-02-14 22:04:25 +0000 | [diff] [blame] | 739 | { |
| 740 | uint32_t Rd; // the destination register |
Johnny Chen | 357c30f | 2011-02-14 22:04:25 +0000 | [diff] [blame] | 741 | uint32_t imm32; // the immediate value to be written to Rd |
| 742 | uint32_t carry; // the carry bit after ThumbExpandImm_C or ARMExpandImm_C. |
| 743 | bool setflags; |
| 744 | switch (encoding) { |
Caroline Tice | 89c6d58 | 2011-03-29 19:53:44 +0000 | [diff] [blame] | 745 | case eEncodingT1: |
| 746 | Rd = Bits32(opcode, 10, 8); |
| 747 | setflags = !InITBlock(); |
| 748 | imm32 = Bits32(opcode, 7, 0); // imm32 = ZeroExtend(imm8, 32) |
| 749 | carry = APSR_C; |
| 750 | |
| 751 | break; |
| 752 | |
| 753 | case eEncodingT2: |
| 754 | Rd = Bits32(opcode, 11, 8); |
| 755 | setflags = BitIsSet(opcode, 20); |
| 756 | imm32 = ThumbExpandImm_C(opcode, APSR_C, carry); |
| 757 | if (BadReg(Rd)) |
| 758 | return false; |
| 759 | |
| 760 | break; |
| 761 | |
| 762 | case eEncodingT3: |
| 763 | { |
| 764 | // d = UInt(Rd); setflags = FALSE; imm32 = ZeroExtend(imm4:i:imm3:imm8, 32); |
| 765 | Rd = Bits32 (opcode, 11, 8); |
| 766 | setflags = false; |
| 767 | uint32_t imm4 = Bits32 (opcode, 19, 16); |
| 768 | uint32_t imm3 = Bits32 (opcode, 14, 12); |
| 769 | uint32_t i = Bit32 (opcode, 26); |
| 770 | uint32_t imm8 = Bits32 (opcode, 7, 0); |
| 771 | imm32 = (imm4 << 12) | (i << 11) | (imm3 << 8) | imm8; |
| 772 | |
| 773 | // if BadReg(d) then UNPREDICTABLE; |
| 774 | if (BadReg (Rd)) |
| 775 | return false; |
| 776 | } |
| 777 | break; |
| 778 | |
| 779 | case eEncodingA1: |
Caroline Tice | 89c6d58 | 2011-03-29 19:53:44 +0000 | [diff] [blame] | 780 | // d = UInt(Rd); setflags = (S == ‘1’); (imm32, carry) = ARMExpandImm_C(imm12, APSR.C); |
| 781 | Rd = Bits32 (opcode, 15, 12); |
| 782 | setflags = BitIsSet (opcode, 20); |
| 783 | imm32 = ARMExpandImm_C (opcode, APSR_C, carry); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 784 | |
| 785 | // if Rd == ‘1111’ && S == ‘1’ then SEE SUBS PC, LR and related instructions; |
| 786 | if ((Rd == 15) && setflags) |
| 787 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Caroline Tice | 89c6d58 | 2011-03-29 19:53:44 +0000 | [diff] [blame] | 788 | |
| 789 | break; |
| 790 | |
| 791 | case eEncodingA2: |
| 792 | { |
| 793 | // d = UInt(Rd); setflags = FALSE; imm32 = ZeroExtend(imm4:imm12, 32); |
| 794 | Rd = Bits32 (opcode, 15, 12); |
| 795 | setflags = false; |
| 796 | uint32_t imm4 = Bits32 (opcode, 19, 16); |
| 797 | uint32_t imm12 = Bits32 (opcode, 11, 0); |
| 798 | imm32 = (imm4 << 12) | imm12; |
| 799 | |
| 800 | // if d == 15 then UNPREDICTABLE; |
| 801 | if (Rd == 15) |
| 802 | return false; |
| 803 | } |
| 804 | break; |
| 805 | |
| 806 | default: |
Johnny Chen | 9798cfc | 2011-02-14 23:33:58 +0000 | [diff] [blame] | 807 | return false; |
Johnny Chen | 357c30f | 2011-02-14 22:04:25 +0000 | [diff] [blame] | 808 | } |
| 809 | uint32_t result = imm32; |
| 810 | |
| 811 | // The context specifies that an immediate is to be moved into Rd. |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 812 | EmulateInstruction::Context context; |
| 813 | context.type = EmulateInstruction::eContextImmediate; |
| 814 | context.SetNoArgs (); |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 815 | |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 816 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 817 | return false; |
Johnny Chen | 357c30f | 2011-02-14 22:04:25 +0000 | [diff] [blame] | 818 | } |
| 819 | return true; |
| 820 | } |
| 821 | |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 822 | // MUL multiplies two register values. The least significant 32 bits of the result are written to the destination |
| 823 | // register. These 32 bits do not depend on whether the source register values are considered to be signed values or |
| 824 | // unsigned values. |
| 825 | // |
| 826 | // Optionally, it can update the condition flags based on the result. In the Thumb instruction set, this option is |
| 827 | // limited to only a few forms of the instruction. |
| 828 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 829 | EmulateInstructionARM::EmulateMUL (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 830 | { |
| 831 | #if 0 |
| 832 | if ConditionPassed() then |
| 833 | EncodingSpecificOperations(); |
| 834 | operand1 = SInt(R[n]); // operand1 = UInt(R[n]) produces the same final results |
| 835 | operand2 = SInt(R[m]); // operand2 = UInt(R[m]) produces the same final results |
| 836 | result = operand1 * operand2; |
| 837 | R[d] = result<31:0>; |
| 838 | if setflags then |
| 839 | APSR.N = result<31>; |
| 840 | APSR.Z = IsZeroBit(result); |
| 841 | if ArchVersion() == 4 then |
| 842 | APSR.C = bit UNKNOWN; |
| 843 | // else APSR.C unchanged |
| 844 | // APSR.V always unchanged |
| 845 | #endif |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 846 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 847 | if (ConditionPassed(opcode)) |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 848 | { |
| 849 | uint32_t d; |
| 850 | uint32_t n; |
| 851 | uint32_t m; |
| 852 | bool setflags; |
| 853 | |
| 854 | // EncodingSpecificOperations(); |
| 855 | switch (encoding) |
| 856 | { |
| 857 | case eEncodingT1: |
| 858 | // d = UInt(Rdm); n = UInt(Rn); m = UInt(Rdm); setflags = !InITBlock(); |
| 859 | d = Bits32 (opcode, 2, 0); |
| 860 | n = Bits32 (opcode, 5, 3); |
| 861 | m = Bits32 (opcode, 2, 0); |
| 862 | setflags = !InITBlock(); |
| 863 | |
| 864 | // if ArchVersion() < 6 && d == n then UNPREDICTABLE; |
| 865 | if ((ArchVersion() < ARMv6) && (d == n)) |
| 866 | return false; |
| 867 | |
| 868 | break; |
| 869 | |
| 870 | case eEncodingT2: |
| 871 | // d = UInt(Rd); n = UInt(Rn); m = UInt(Rm); setflags = FALSE; |
| 872 | d = Bits32 (opcode, 11, 8); |
| 873 | n = Bits32 (opcode, 19, 16); |
| 874 | m = Bits32 (opcode, 3, 0); |
| 875 | setflags = false; |
| 876 | |
| 877 | // if BadReg(d) || BadReg(n) || BadReg(m) then UNPREDICTABLE; |
| 878 | if (BadReg (d) || BadReg (n) || BadReg (m)) |
| 879 | return false; |
| 880 | |
| 881 | break; |
| 882 | |
| 883 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 884 | // d = UInt(Rd); n = UInt(Rn); m = UInt(Rm); setflags = (S == '1'); |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 885 | d = Bits32 (opcode, 19, 16); |
| 886 | n = Bits32 (opcode, 3, 0); |
| 887 | m = Bits32 (opcode, 11, 8); |
| 888 | setflags = BitIsSet (opcode, 20); |
| 889 | |
| 890 | // if d == 15 || n == 15 || m == 15 then UNPREDICTABLE; |
| 891 | if ((d == 15) || (n == 15) || (m == 15)) |
| 892 | return false; |
| 893 | |
| 894 | // if ArchVersion() < 6 && d == n then UNPREDICTABLE; |
| 895 | if ((ArchVersion() < ARMv6) && (d == n)) |
| 896 | return false; |
| 897 | |
| 898 | break; |
| 899 | |
| 900 | default: |
| 901 | return false; |
| 902 | } |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 903 | |
| 904 | bool success = false; |
| 905 | |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 906 | // operand1 = SInt(R[n]); // operand1 = UInt(R[n]) produces the same final results |
| 907 | uint64_t operand1 = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 908 | if (!success) |
| 909 | return false; |
| 910 | |
| 911 | // operand2 = SInt(R[m]); // operand2 = UInt(R[m]) produces the same final results |
| 912 | uint64_t operand2 = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 913 | if (!success) |
| 914 | return false; |
| 915 | |
| 916 | // result = operand1 * operand2; |
| 917 | uint64_t result = operand1 * operand2; |
| 918 | |
| 919 | // R[d] = result<31:0>; |
| 920 | Register op1_reg; |
| 921 | Register op2_reg; |
| 922 | op1_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 923 | op2_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + m); |
| 924 | |
| 925 | EmulateInstruction::Context context; |
| 926 | context.type = eContextMultiplication; |
| 927 | context.SetRegisterRegisterOperands (op1_reg, op2_reg); |
| 928 | |
| 929 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + d, (0x0000ffff & result))) |
| 930 | return false; |
| 931 | |
| 932 | // if setflags then |
| 933 | if (setflags) |
| 934 | { |
| 935 | // APSR.N = result<31>; |
| 936 | // APSR.Z = IsZeroBit(result); |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 937 | m_new_inst_cpsr = m_opcode_cpsr; |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 938 | SetBit32 (m_new_inst_cpsr, CPSR_N_POS, Bit32 (result, 31)); |
| 939 | SetBit32 (m_new_inst_cpsr, CPSR_Z_POS, result == 0 ? 1 : 0); |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 940 | if (m_new_inst_cpsr != m_opcode_cpsr) |
Caroline Tice | 5c1e2ed | 2011-03-02 22:43:54 +0000 | [diff] [blame] | 941 | { |
| 942 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FLAGS, m_new_inst_cpsr)) |
| 943 | return false; |
| 944 | } |
| 945 | |
| 946 | // if ArchVersion() == 4 then |
| 947 | // APSR.C = bit UNKNOWN; |
| 948 | } |
| 949 | } |
| 950 | return true; |
| 951 | } |
| 952 | |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 953 | // Bitwise NOT (immediate) writes the bitwise inverse of an immediate value to the destination register. |
| 954 | // It can optionally update the condition flags based on the value. |
Johnny Chen | 28070c3 | 2011-02-12 01:27:26 +0000 | [diff] [blame] | 955 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 956 | EmulateInstructionARM::EmulateMVNImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 28070c3 | 2011-02-12 01:27:26 +0000 | [diff] [blame] | 957 | { |
| 958 | #if 0 |
| 959 | // ARM pseudo code... |
| 960 | if (ConditionPassed()) |
| 961 | { |
| 962 | EncodingSpecificOperations(); |
| 963 | result = NOT(imm32); |
| 964 | if d == 15 then // Can only occur for ARM encoding |
| 965 | ALUWritePC(result); // setflags is always FALSE here |
| 966 | else |
| 967 | R[d] = result; |
| 968 | if setflags then |
| 969 | APSR.N = result<31>; |
| 970 | APSR.Z = IsZeroBit(result); |
| 971 | APSR.C = carry; |
| 972 | // APSR.V unchanged |
| 973 | } |
| 974 | #endif |
Johnny Chen | 33bf6ab | 2011-02-14 20:39:01 +0000 | [diff] [blame] | 975 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 976 | if (ConditionPassed(opcode)) |
Johnny Chen | 33bf6ab | 2011-02-14 20:39:01 +0000 | [diff] [blame] | 977 | { |
| 978 | uint32_t Rd; // the destination register |
Johnny Chen | 357c30f | 2011-02-14 22:04:25 +0000 | [diff] [blame] | 979 | uint32_t imm32; // the output after ThumbExpandImm_C or ARMExpandImm_C |
| 980 | uint32_t carry; // the carry bit after ThumbExpandImm_C or ARMExpandImm_C |
Johnny Chen | 33bf6ab | 2011-02-14 20:39:01 +0000 | [diff] [blame] | 981 | bool setflags; |
| 982 | switch (encoding) { |
| 983 | case eEncodingT1: |
| 984 | Rd = Bits32(opcode, 11, 8); |
Johnny Chen | 33bf6ab | 2011-02-14 20:39:01 +0000 | [diff] [blame] | 985 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 986 | imm32 = ThumbExpandImm_C(opcode, APSR_C, carry); |
Johnny Chen | 33bf6ab | 2011-02-14 20:39:01 +0000 | [diff] [blame] | 987 | break; |
| 988 | case eEncodingA1: |
| 989 | Rd = Bits32(opcode, 15, 12); |
Johnny Chen | 33bf6ab | 2011-02-14 20:39:01 +0000 | [diff] [blame] | 990 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 991 | imm32 = ARMExpandImm_C(opcode, APSR_C, carry); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 992 | |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 993 | // 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] | 994 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 995 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 33bf6ab | 2011-02-14 20:39:01 +0000 | [diff] [blame] | 996 | break; |
| 997 | default: |
| 998 | return false; |
| 999 | } |
| 1000 | uint32_t result = ~imm32; |
| 1001 | |
| 1002 | // The context specifies that an immediate is to be moved into Rd. |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1003 | EmulateInstruction::Context context; |
| 1004 | context.type = EmulateInstruction::eContextImmediate; |
| 1005 | context.SetNoArgs (); |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 1006 | |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 1007 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 1008 | return false; |
Johnny Chen | 33bf6ab | 2011-02-14 20:39:01 +0000 | [diff] [blame] | 1009 | } |
| 1010 | return true; |
Johnny Chen | 28070c3 | 2011-02-12 01:27:26 +0000 | [diff] [blame] | 1011 | } |
| 1012 | |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1013 | // Bitwise NOT (register) writes the bitwise inverse of a register value to the destination register. |
| 1014 | // It can optionally update the condition flags based on the result. |
| 1015 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1016 | EmulateInstructionARM::EmulateMVNReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1017 | { |
| 1018 | #if 0 |
| 1019 | // ARM pseudo code... |
| 1020 | if (ConditionPassed()) |
| 1021 | { |
| 1022 | EncodingSpecificOperations(); |
| 1023 | (shifted, carry) = Shift_C(R[m], shift_t, shift_n, APSR.C); |
| 1024 | result = NOT(shifted); |
| 1025 | if d == 15 then // Can only occur for ARM encoding |
| 1026 | ALUWritePC(result); // setflags is always FALSE here |
| 1027 | else |
| 1028 | R[d] = result; |
| 1029 | if setflags then |
| 1030 | APSR.N = result<31>; |
| 1031 | APSR.Z = IsZeroBit(result); |
| 1032 | APSR.C = carry; |
| 1033 | // APSR.V unchanged |
| 1034 | } |
| 1035 | #endif |
| 1036 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1037 | if (ConditionPassed(opcode)) |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1038 | { |
| 1039 | uint32_t Rm; // the source register |
| 1040 | uint32_t Rd; // the destination register |
| 1041 | ARM_ShifterType shift_t; |
| 1042 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 1043 | bool setflags; |
| 1044 | uint32_t carry; // the carry bit after the shift operation |
| 1045 | switch (encoding) { |
| 1046 | case eEncodingT1: |
| 1047 | Rd = Bits32(opcode, 2, 0); |
| 1048 | Rm = Bits32(opcode, 5, 3); |
| 1049 | setflags = !InITBlock(); |
| 1050 | shift_t = SRType_LSL; |
| 1051 | shift_n = 0; |
| 1052 | if (InITBlock()) |
| 1053 | return false; |
| 1054 | break; |
| 1055 | case eEncodingT2: |
| 1056 | Rd = Bits32(opcode, 11, 8); |
| 1057 | Rm = Bits32(opcode, 3, 0); |
| 1058 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 1059 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1060 | // if (BadReg(d) || BadReg(m)) then UNPREDICTABLE; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 1061 | if (BadReg(Rd) || BadReg(Rm)) |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1062 | return false; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 1063 | break; |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1064 | case eEncodingA1: |
| 1065 | Rd = Bits32(opcode, 15, 12); |
| 1066 | Rm = Bits32(opcode, 3, 0); |
| 1067 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 1068 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1069 | break; |
| 1070 | default: |
| 1071 | return false; |
| 1072 | } |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1073 | bool success = false; |
Johnny Chen | d642a6a | 2011-02-22 01:01:03 +0000 | [diff] [blame] | 1074 | uint32_t value = ReadCoreReg(Rm, &success); |
| 1075 | if (!success) |
| 1076 | return false; |
| 1077 | |
| 1078 | uint32_t shifted = Shift_C(value, shift_t, shift_n, APSR_C, carry); |
| 1079 | uint32_t result = ~shifted; |
| 1080 | |
| 1081 | // The context specifies that an immediate is to be moved into Rd. |
| 1082 | EmulateInstruction::Context context; |
| 1083 | context.type = EmulateInstruction::eContextImmediate; |
| 1084 | context.SetNoArgs (); |
| 1085 | |
| 1086 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
| 1087 | return false; |
| 1088 | } |
| 1089 | return true; |
| 1090 | } |
| 1091 | |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1092 | // PC relative immediate load into register, possibly followed by ADD (SP plus register). |
| 1093 | // LDR (literal) |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1094 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1095 | EmulateInstructionARM::EmulateLDRRtPCRelative (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1096 | { |
| 1097 | #if 0 |
| 1098 | // ARM pseudo code... |
| 1099 | if (ConditionPassed()) |
| 1100 | { |
| 1101 | EncodingSpecificOperations(); NullCheckIfThumbEE(15); |
| 1102 | base = Align(PC,4); |
| 1103 | address = if add then (base + imm32) else (base - imm32); |
| 1104 | data = MemU[address,4]; |
| 1105 | if t == 15 then |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1106 | if address<1:0> == '00' then LoadWritePC(data); else UNPREDICTABLE; |
| 1107 | elsif UnalignedSupport() || address<1:0> = '00' then |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1108 | R[t] = data; |
| 1109 | else // Can only apply before ARMv7 |
| 1110 | if CurrentInstrSet() == InstrSet_ARM then |
| 1111 | R[t] = ROR(data, 8*UInt(address<1:0>)); |
| 1112 | else |
| 1113 | R[t] = bits(32) UNKNOWN; |
| 1114 | } |
| 1115 | #endif |
| 1116 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1117 | if (ConditionPassed(opcode)) |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1118 | { |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1119 | bool success = false; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1120 | const uint32_t pc = ReadCoreReg(PC_REG, &success); |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1121 | if (!success) |
| 1122 | return false; |
Johnny Chen | 809742e | 2011-01-28 00:32:27 +0000 | [diff] [blame] | 1123 | |
| 1124 | // PC relative immediate load context |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1125 | EmulateInstruction::Context context; |
| 1126 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
| 1127 | Register pc_reg; |
| 1128 | pc_reg.SetRegister (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC); |
| 1129 | context.SetRegisterPlusOffset (pc_reg, 0); |
| 1130 | |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1131 | uint32_t Rt; // the destination register |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1132 | uint32_t imm32; // immediate offset from the PC |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1133 | bool add; // +imm32 or -imm32? |
| 1134 | addr_t base; // the base address |
| 1135 | addr_t address; // the PC relative address |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1136 | uint32_t data; // the literal data value from the PC relative load |
| 1137 | switch (encoding) { |
| 1138 | case eEncodingT1: |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1139 | Rt = Bits32(opcode, 10, 8); |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1140 | imm32 = Bits32(opcode, 7, 0) << 2; // imm32 = ZeroExtend(imm8:'00', 32); |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1141 | add = true; |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1142 | break; |
| 1143 | case eEncodingT2: |
| 1144 | Rt = Bits32(opcode, 15, 12); |
| 1145 | imm32 = Bits32(opcode, 11, 0) << 2; // imm32 = ZeroExtend(imm12, 32); |
| 1146 | add = BitIsSet(opcode, 23); |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 1147 | if (Rt == 15 && InITBlock() && !LastInITBlock()) |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1148 | return false; |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1149 | break; |
| 1150 | default: |
| 1151 | return false; |
| 1152 | } |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1153 | |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1154 | base = Align(pc, 4); |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1155 | if (add) |
| 1156 | address = base + imm32; |
| 1157 | else |
| 1158 | address = base - imm32; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1159 | |
| 1160 | context.SetRegisterPlusOffset(pc_reg, address - base); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 1161 | data = MemURead(context, address, 4, 0, &success); |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1162 | if (!success) |
Johnny Chen | 809742e | 2011-01-28 00:32:27 +0000 | [diff] [blame] | 1163 | return false; |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1164 | |
| 1165 | if (Rt == 15) |
| 1166 | { |
| 1167 | if (Bits32(address, 1, 0) == 0) |
| 1168 | { |
| 1169 | // In ARMv5T and above, this is an interworking branch. |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 1170 | if (!LoadWritePC(context, data)) |
Johnny Chen | c9de910 | 2011-02-11 19:12:30 +0000 | [diff] [blame] | 1171 | return false; |
| 1172 | } |
| 1173 | else |
| 1174 | return false; |
| 1175 | } |
| 1176 | else if (UnalignedSupport() || Bits32(address, 1, 0) == 0) |
| 1177 | { |
| 1178 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + Rt, data)) |
| 1179 | return false; |
| 1180 | } |
| 1181 | else // We don't handle ARM for now. |
| 1182 | return false; |
| 1183 | |
Johnny Chen | 788e055 | 2011-01-27 22:52:23 +0000 | [diff] [blame] | 1184 | } |
| 1185 | return true; |
| 1186 | } |
| 1187 | |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1188 | // An add operation to adjust the SP. |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 1189 | // ADD (SP plus immediate) |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1190 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1191 | EmulateInstructionARM::EmulateADDSPImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 1192 | { |
| 1193 | #if 0 |
| 1194 | // ARM pseudo code... |
| 1195 | if (ConditionPassed()) |
| 1196 | { |
| 1197 | EncodingSpecificOperations(); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1198 | (result, carry, overflow) = AddWithCarry(SP, imm32, '0'); |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 1199 | if d == 15 then // Can only occur for ARM encoding |
| 1200 | ALUWritePC(result); // setflags is always FALSE here |
| 1201 | else |
| 1202 | R[d] = result; |
| 1203 | if setflags then |
| 1204 | APSR.N = result<31>; |
| 1205 | APSR.Z = IsZeroBit(result); |
| 1206 | APSR.C = carry; |
| 1207 | APSR.V = overflow; |
| 1208 | } |
| 1209 | #endif |
| 1210 | |
| 1211 | bool success = false; |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 1212 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1213 | if (ConditionPassed(opcode)) |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 1214 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1215 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 1216 | if (!success) |
| 1217 | return false; |
| 1218 | uint32_t imm32; // the immediate operand |
Caroline Tice | e221288 | 2011-03-22 22:38:28 +0000 | [diff] [blame] | 1219 | uint32_t d; |
| 1220 | bool setflags; |
| 1221 | switch (encoding) |
| 1222 | { |
| 1223 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1224 | // d = UInt(Rd); setflags = FALSE; imm32 = ZeroExtend(imm8:'00', 32); |
Caroline Tice | e221288 | 2011-03-22 22:38:28 +0000 | [diff] [blame] | 1225 | d = Bits32 (opcode, 10, 8); |
| 1226 | setflags = false; |
| 1227 | imm32 = (Bits32 (opcode, 7, 0) << 2); |
| 1228 | |
| 1229 | break; |
| 1230 | |
| 1231 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1232 | // d = 13; setflags = FALSE; imm32 = ZeroExtend(imm7:'00', 32); |
Caroline Tice | e221288 | 2011-03-22 22:38:28 +0000 | [diff] [blame] | 1233 | d = 13; |
| 1234 | setflags = false; |
| 1235 | imm32 = ThumbImm7Scaled(opcode); // imm32 = ZeroExtend(imm7:'00', 32) |
| 1236 | |
| 1237 | break; |
| 1238 | |
| 1239 | default: |
| 1240 | return false; |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 1241 | } |
| 1242 | addr_t sp_offset = imm32; |
| 1243 | addr_t addr = sp + sp_offset; // the adjusted stack pointer value |
| 1244 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1245 | EmulateInstruction::Context context; |
| 1246 | context.type = EmulateInstruction::eContextAdjustStackPointer; |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 1247 | Register sp_reg; |
| 1248 | sp_reg.SetRegister (eRegisterKindDWARF, dwarf_sp); |
| 1249 | context.SetRegisterPlusOffset (sp_reg, sp_offset); |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 1250 | |
Caroline Tice | e221288 | 2011-03-22 22:38:28 +0000 | [diff] [blame] | 1251 | if (d == 15) |
| 1252 | { |
| 1253 | if (!ALUWritePC (context, addr)) |
| 1254 | return false; |
| 1255 | } |
| 1256 | else |
| 1257 | { |
| 1258 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + d, addr)) |
| 1259 | return false; |
| 1260 | } |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 1261 | } |
| 1262 | return true; |
| 1263 | } |
| 1264 | |
| 1265 | // An add operation to adjust the SP. |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1266 | // ADD (SP plus register) |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1267 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1268 | EmulateInstructionARM::EmulateADDSPRm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1269 | { |
| 1270 | #if 0 |
| 1271 | // ARM pseudo code... |
| 1272 | if (ConditionPassed()) |
| 1273 | { |
| 1274 | EncodingSpecificOperations(); |
| 1275 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1276 | (result, carry, overflow) = AddWithCarry(SP, shifted, '0'); |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1277 | if d == 15 then |
| 1278 | ALUWritePC(result); // setflags is always FALSE here |
| 1279 | else |
| 1280 | R[d] = result; |
| 1281 | if setflags then |
| 1282 | APSR.N = result<31>; |
| 1283 | APSR.Z = IsZeroBit(result); |
| 1284 | APSR.C = carry; |
| 1285 | APSR.V = overflow; |
| 1286 | } |
| 1287 | #endif |
| 1288 | |
| 1289 | bool success = false; |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1290 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1291 | if (ConditionPassed(opcode)) |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1292 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1293 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1294 | if (!success) |
| 1295 | return false; |
| 1296 | uint32_t Rm; // the second operand |
| 1297 | switch (encoding) { |
| 1298 | case eEncodingT2: |
| 1299 | Rm = Bits32(opcode, 6, 3); |
| 1300 | break; |
| 1301 | default: |
| 1302 | return false; |
| 1303 | } |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1304 | int32_t reg_value = ReadCoreReg(Rm, &success); |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1305 | if (!success) |
| 1306 | return false; |
| 1307 | |
| 1308 | addr_t addr = (int32_t)sp + reg_value; // the adjusted stack pointer value |
| 1309 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1310 | EmulateInstruction::Context context; |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 1311 | context.type = EmulateInstruction::eContextAddition; |
| 1312 | Register sp_reg; |
| 1313 | sp_reg.SetRegister (eRegisterKindDWARF, dwarf_sp); |
| 1314 | Register other_reg; |
| 1315 | other_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + Rm); |
| 1316 | context.SetRegisterRegisterOperands (sp_reg, other_reg); |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1317 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1318 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP, addr)) |
Johnny Chen | 5b442b7 | 2011-01-27 19:34:30 +0000 | [diff] [blame] | 1319 | return false; |
| 1320 | } |
| 1321 | return true; |
| 1322 | } |
| 1323 | |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1324 | // Branch with Link and Exchange Instruction Sets (immediate) calls a subroutine |
| 1325 | // at a PC-relative address, and changes instruction set from ARM to Thumb, or |
| 1326 | // from Thumb to ARM. |
| 1327 | // BLX (immediate) |
| 1328 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1329 | EmulateInstructionARM::EmulateBLXImmediate (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1330 | { |
| 1331 | #if 0 |
| 1332 | // ARM pseudo code... |
| 1333 | if (ConditionPassed()) |
| 1334 | { |
| 1335 | EncodingSpecificOperations(); |
| 1336 | if CurrentInstrSet() == InstrSet_ARM then |
| 1337 | LR = PC - 4; |
| 1338 | else |
| 1339 | LR = PC<31:1> : '1'; |
| 1340 | if targetInstrSet == InstrSet_ARM then |
| 1341 | targetAddress = Align(PC,4) + imm32; |
| 1342 | else |
| 1343 | targetAddress = PC + imm32; |
| 1344 | SelectInstrSet(targetInstrSet); |
| 1345 | BranchWritePC(targetAddress); |
| 1346 | } |
| 1347 | #endif |
| 1348 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1349 | bool success = true; |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1350 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1351 | if (ConditionPassed(opcode)) |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1352 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1353 | EmulateInstruction::Context context; |
| 1354 | context.type = EmulateInstruction::eContextRelativeBranchImmediate; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1355 | const uint32_t pc = ReadCoreReg(PC_REG, &success); |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1356 | if (!success) |
| 1357 | return false; |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 1358 | addr_t lr; // next instruction address |
| 1359 | addr_t target; // target address |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1360 | int32_t imm32; // PC-relative offset |
| 1361 | switch (encoding) { |
Johnny Chen | d6c13f0 | 2011-02-08 20:36:34 +0000 | [diff] [blame] | 1362 | case eEncodingT1: |
| 1363 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1364 | lr = pc | 1u; // return address |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 1365 | uint32_t S = Bit32(opcode, 26); |
Johnny Chen | d6c13f0 | 2011-02-08 20:36:34 +0000 | [diff] [blame] | 1366 | uint32_t imm10 = Bits32(opcode, 25, 16); |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 1367 | uint32_t J1 = Bit32(opcode, 13); |
| 1368 | uint32_t J2 = Bit32(opcode, 11); |
Johnny Chen | d6c13f0 | 2011-02-08 20:36:34 +0000 | [diff] [blame] | 1369 | uint32_t imm11 = Bits32(opcode, 10, 0); |
| 1370 | uint32_t I1 = !(J1 ^ S); |
| 1371 | uint32_t I2 = !(J2 ^ S); |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 1372 | 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] | 1373 | imm32 = llvm::SignExtend32<25>(imm25); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1374 | target = pc + imm32; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1375 | context.SetModeAndImmediateSigned (eModeThumb, 4 + imm32); |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 1376 | if (InITBlock() && !LastInITBlock()) |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1377 | return false; |
Johnny Chen | d6c13f0 | 2011-02-08 20:36:34 +0000 | [diff] [blame] | 1378 | break; |
| 1379 | } |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1380 | case eEncodingT2: |
| 1381 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1382 | lr = pc | 1u; // return address |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 1383 | uint32_t S = Bit32(opcode, 26); |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1384 | uint32_t imm10H = Bits32(opcode, 25, 16); |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 1385 | uint32_t J1 = Bit32(opcode, 13); |
| 1386 | uint32_t J2 = Bit32(opcode, 11); |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1387 | uint32_t imm10L = Bits32(opcode, 10, 1); |
| 1388 | uint32_t I1 = !(J1 ^ S); |
| 1389 | uint32_t I2 = !(J2 ^ S); |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 1390 | 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] | 1391 | imm32 = llvm::SignExtend32<25>(imm25); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1392 | target = Align(pc, 4) + imm32; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1393 | context.SetModeAndImmediateSigned (eModeARM, 4 + imm32); |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 1394 | if (InITBlock() && !LastInITBlock()) |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1395 | return false; |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1396 | break; |
| 1397 | } |
Johnny Chen | c47d0ca | 2011-02-08 18:58:31 +0000 | [diff] [blame] | 1398 | case eEncodingA1: |
Caroline Tice | 2b03ed8 | 2011-03-16 00:06:12 +0000 | [diff] [blame] | 1399 | lr = pc - 4; // return address |
Johnny Chen | c47d0ca | 2011-02-08 18:58:31 +0000 | [diff] [blame] | 1400 | imm32 = llvm::SignExtend32<26>(Bits32(opcode, 23, 0) << 2); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1401 | target = Align(pc, 4) + imm32; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1402 | context.SetModeAndImmediateSigned (eModeARM, 8 + imm32); |
Johnny Chen | c47d0ca | 2011-02-08 18:58:31 +0000 | [diff] [blame] | 1403 | break; |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1404 | case eEncodingA2: |
Caroline Tice | 2b03ed8 | 2011-03-16 00:06:12 +0000 | [diff] [blame] | 1405 | lr = pc - 4; // return address |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1406 | 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] | 1407 | target = pc + imm32; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1408 | context.SetModeAndImmediateSigned (eModeThumb, 8 + imm32); |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1409 | break; |
| 1410 | default: |
| 1411 | return false; |
| 1412 | } |
| 1413 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_RA, lr)) |
| 1414 | return false; |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 1415 | if (!BranchWritePC(context, target)) |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1416 | return false; |
| 1417 | } |
| 1418 | return true; |
| 1419 | } |
| 1420 | |
| 1421 | // Branch with Link and Exchange (register) calls a subroutine at an address and |
| 1422 | // instruction set specified by a register. |
| 1423 | // BLX (register) |
| 1424 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1425 | EmulateInstructionARM::EmulateBLXRm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1426 | { |
| 1427 | #if 0 |
| 1428 | // ARM pseudo code... |
| 1429 | if (ConditionPassed()) |
| 1430 | { |
| 1431 | EncodingSpecificOperations(); |
| 1432 | target = R[m]; |
| 1433 | if CurrentInstrSet() == InstrSet_ARM then |
| 1434 | next_instr_addr = PC - 4; |
| 1435 | LR = next_instr_addr; |
| 1436 | else |
| 1437 | next_instr_addr = PC - 2; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1438 | LR = next_instr_addr<31:1> : '1'; |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1439 | BXWritePC(target); |
| 1440 | } |
| 1441 | #endif |
| 1442 | |
| 1443 | bool success = false; |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1444 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1445 | if (ConditionPassed(opcode)) |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1446 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1447 | EmulateInstruction::Context context; |
| 1448 | context.type = EmulateInstruction::eContextAbsoluteBranchRegister; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1449 | const uint32_t pc = ReadCoreReg(PC_REG, &success); |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1450 | addr_t lr; // next instruction address |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1451 | if (!success) |
| 1452 | return false; |
| 1453 | uint32_t Rm; // the register with the target address |
| 1454 | switch (encoding) { |
| 1455 | case eEncodingT1: |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1456 | lr = (pc - 2) | 1u; // return address |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1457 | Rm = Bits32(opcode, 6, 3); |
| 1458 | // if m == 15 then UNPREDICTABLE; |
| 1459 | if (Rm == 15) |
| 1460 | return false; |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 1461 | if (InITBlock() && !LastInITBlock()) |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1462 | return false; |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1463 | break; |
| 1464 | case eEncodingA1: |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1465 | lr = pc - 4; // return address |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1466 | Rm = Bits32(opcode, 3, 0); |
| 1467 | // if m == 15 then UNPREDICTABLE; |
| 1468 | if (Rm == 15) |
| 1469 | return false; |
Johnny Chen | b77be41 | 2011-02-04 00:40:18 +0000 | [diff] [blame] | 1470 | break; |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1471 | default: |
| 1472 | return false; |
| 1473 | } |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1474 | addr_t target = ReadCoreReg (Rm, &success); |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1475 | if (!success) |
| 1476 | return false; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1477 | Register dwarf_reg; |
| 1478 | dwarf_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + Rm); |
| 1479 | context.SetRegister (dwarf_reg); |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1480 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_RA, lr)) |
| 1481 | return false; |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 1482 | if (!BXWritePC(context, target)) |
Johnny Chen | 9b8d783 | 2011-02-02 01:13:56 +0000 | [diff] [blame] | 1483 | return false; |
| 1484 | } |
| 1485 | return true; |
| 1486 | } |
| 1487 | |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1488 | // 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] | 1489 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1490 | EmulateInstructionARM::EmulateBXRm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1491 | { |
| 1492 | #if 0 |
| 1493 | // ARM pseudo code... |
| 1494 | if (ConditionPassed()) |
| 1495 | { |
| 1496 | EncodingSpecificOperations(); |
| 1497 | BXWritePC(R[m]); |
| 1498 | } |
| 1499 | #endif |
| 1500 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1501 | if (ConditionPassed(opcode)) |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1502 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1503 | EmulateInstruction::Context context; |
| 1504 | context.type = EmulateInstruction::eContextAbsoluteBranchRegister; |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1505 | uint32_t Rm; // the register with the target address |
| 1506 | switch (encoding) { |
| 1507 | case eEncodingT1: |
| 1508 | Rm = Bits32(opcode, 6, 3); |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 1509 | if (InITBlock() && !LastInITBlock()) |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1510 | return false; |
| 1511 | break; |
| 1512 | case eEncodingA1: |
| 1513 | Rm = Bits32(opcode, 3, 0); |
| 1514 | break; |
| 1515 | default: |
| 1516 | return false; |
| 1517 | } |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1518 | bool success = false; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1519 | addr_t target = ReadCoreReg (Rm, &success); |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1520 | if (!success) |
| 1521 | return false; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1522 | |
| 1523 | Register dwarf_reg; |
| 1524 | dwarf_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + Rm); |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 1525 | context.SetRegister (dwarf_reg); |
| 1526 | if (!BXWritePC(context, target)) |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 1527 | return false; |
| 1528 | } |
| 1529 | return true; |
| 1530 | } |
| 1531 | |
Johnny Chen | 59e6ab7 | 2011-02-24 21:01:20 +0000 | [diff] [blame] | 1532 | // Branch and Exchange Jazelle attempts to change to Jazelle state. If the attempt fails, it branches to an |
| 1533 | // address and instruction set specified by a register as though it were a BX instruction. |
| 1534 | // |
| 1535 | // TODO: Emulate Jazelle architecture? |
| 1536 | // We currently assume that switching to Jazelle state fails, thus treating BXJ as a BX operation. |
| 1537 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1538 | EmulateInstructionARM::EmulateBXJRm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 59e6ab7 | 2011-02-24 21:01:20 +0000 | [diff] [blame] | 1539 | { |
| 1540 | #if 0 |
| 1541 | // ARM pseudo code... |
| 1542 | if (ConditionPassed()) |
| 1543 | { |
| 1544 | EncodingSpecificOperations(); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1545 | if JMCR.JE == '0' || CurrentInstrSet() == InstrSet_ThumbEE then |
Johnny Chen | 59e6ab7 | 2011-02-24 21:01:20 +0000 | [diff] [blame] | 1546 | BXWritePC(R[m]); |
| 1547 | else |
| 1548 | if JazelleAcceptsExecution() then |
| 1549 | SwitchToJazelleExecution(); |
| 1550 | else |
| 1551 | SUBARCHITECTURE_DEFINED handler call; |
| 1552 | } |
| 1553 | #endif |
| 1554 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1555 | if (ConditionPassed(opcode)) |
Johnny Chen | 59e6ab7 | 2011-02-24 21:01:20 +0000 | [diff] [blame] | 1556 | { |
| 1557 | EmulateInstruction::Context context; |
| 1558 | context.type = EmulateInstruction::eContextAbsoluteBranchRegister; |
| 1559 | uint32_t Rm; // the register with the target address |
| 1560 | switch (encoding) { |
| 1561 | case eEncodingT1: |
| 1562 | Rm = Bits32(opcode, 19, 16); |
| 1563 | if (BadReg(Rm)) |
| 1564 | return false; |
| 1565 | if (InITBlock() && !LastInITBlock()) |
| 1566 | return false; |
| 1567 | break; |
| 1568 | case eEncodingA1: |
| 1569 | Rm = Bits32(opcode, 3, 0); |
| 1570 | if (Rm == 15) |
| 1571 | return false; |
| 1572 | break; |
| 1573 | default: |
| 1574 | return false; |
| 1575 | } |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1576 | bool success = false; |
Johnny Chen | 59e6ab7 | 2011-02-24 21:01:20 +0000 | [diff] [blame] | 1577 | addr_t target = ReadCoreReg (Rm, &success); |
| 1578 | if (!success) |
| 1579 | return false; |
| 1580 | |
| 1581 | Register dwarf_reg; |
| 1582 | dwarf_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + Rm); |
| 1583 | context.SetRegister (dwarf_reg); |
| 1584 | if (!BXWritePC(context, target)) |
| 1585 | return false; |
| 1586 | } |
| 1587 | return true; |
| 1588 | } |
| 1589 | |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1590 | // Set r7 to point to some ip offset. |
| 1591 | // SUB (immediate) |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1592 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1593 | EmulateInstructionARM::EmulateSUBR7IPImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1594 | { |
| 1595 | #if 0 |
| 1596 | // ARM pseudo code... |
| 1597 | if (ConditionPassed()) |
| 1598 | { |
| 1599 | EncodingSpecificOperations(); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1600 | (result, carry, overflow) = AddWithCarry(SP, NOT(imm32), '1'); |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1601 | if d == 15 then // Can only occur for ARM encoding |
| 1602 | ALUWritePC(result); // setflags is always FALSE here |
| 1603 | else |
| 1604 | R[d] = result; |
| 1605 | if setflags then |
| 1606 | APSR.N = result<31>; |
| 1607 | APSR.Z = IsZeroBit(result); |
| 1608 | APSR.C = carry; |
| 1609 | APSR.V = overflow; |
| 1610 | } |
| 1611 | #endif |
| 1612 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1613 | if (ConditionPassed(opcode)) |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1614 | { |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1615 | bool success = false; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1616 | const addr_t ip = ReadCoreReg (12, &success); |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1617 | if (!success) |
| 1618 | return false; |
| 1619 | uint32_t imm32; |
| 1620 | switch (encoding) { |
| 1621 | case eEncodingA1: |
| 1622 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
| 1623 | break; |
| 1624 | default: |
| 1625 | return false; |
| 1626 | } |
| 1627 | addr_t ip_offset = imm32; |
| 1628 | addr_t addr = ip - ip_offset; // the adjusted ip value |
| 1629 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1630 | EmulateInstruction::Context context; |
| 1631 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
| 1632 | Register dwarf_reg; |
| 1633 | dwarf_reg.SetRegister (eRegisterKindDWARF, dwarf_r12); |
| 1634 | context.SetRegisterPlusOffset (dwarf_reg, -ip_offset); |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1635 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1636 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r7, addr)) |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1637 | return false; |
| 1638 | } |
| 1639 | return true; |
| 1640 | } |
| 1641 | |
| 1642 | // Set ip to point to some stack offset. |
| 1643 | // SUB (SP minus immediate) |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1644 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1645 | EmulateInstructionARM::EmulateSUBIPSPImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1646 | { |
| 1647 | #if 0 |
| 1648 | // ARM pseudo code... |
| 1649 | if (ConditionPassed()) |
| 1650 | { |
| 1651 | EncodingSpecificOperations(); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1652 | (result, carry, overflow) = AddWithCarry(SP, NOT(imm32), '1'); |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1653 | if d == 15 then // Can only occur for ARM encoding |
| 1654 | ALUWritePC(result); // setflags is always FALSE here |
| 1655 | else |
| 1656 | R[d] = result; |
| 1657 | if setflags then |
| 1658 | APSR.N = result<31>; |
| 1659 | APSR.Z = IsZeroBit(result); |
| 1660 | APSR.C = carry; |
| 1661 | APSR.V = overflow; |
| 1662 | } |
| 1663 | #endif |
| 1664 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1665 | if (ConditionPassed(opcode)) |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1666 | { |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1667 | bool success = false; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1668 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1669 | if (!success) |
| 1670 | return false; |
| 1671 | uint32_t imm32; |
| 1672 | switch (encoding) { |
| 1673 | case eEncodingA1: |
| 1674 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
| 1675 | break; |
| 1676 | default: |
| 1677 | return false; |
| 1678 | } |
| 1679 | addr_t sp_offset = imm32; |
| 1680 | addr_t addr = sp - sp_offset; // the adjusted stack pointer value |
| 1681 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1682 | EmulateInstruction::Context context; |
| 1683 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
| 1684 | Register dwarf_reg; |
| 1685 | dwarf_reg.SetRegister (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP); |
| 1686 | context.SetRegisterPlusOffset (dwarf_reg, -sp_offset); |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1687 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1688 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r12, addr)) |
Johnny Chen | 0d0148e | 2011-01-28 02:26:08 +0000 | [diff] [blame] | 1689 | return false; |
| 1690 | } |
| 1691 | return true; |
| 1692 | } |
| 1693 | |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1694 | // This instruction subtracts an immediate value from the SP value, and writes |
| 1695 | // the result to the destination register. |
| 1696 | // |
| 1697 | // 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] | 1698 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1699 | EmulateInstructionARM::EmulateSUBSPImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 4c0e0bc | 2011-01-25 22:45:28 +0000 | [diff] [blame] | 1700 | { |
| 1701 | #if 0 |
| 1702 | // ARM pseudo code... |
| 1703 | if (ConditionPassed()) |
| 1704 | { |
| 1705 | EncodingSpecificOperations(); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1706 | (result, carry, overflow) = AddWithCarry(SP, NOT(imm32), '1'); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 1707 | if d == 15 then // Can only occur for ARM encoding |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1708 | ALUWritePC(result); // setflags is always FALSE here |
Johnny Chen | 4c0e0bc | 2011-01-25 22:45:28 +0000 | [diff] [blame] | 1709 | else |
| 1710 | R[d] = result; |
| 1711 | if setflags then |
| 1712 | APSR.N = result<31>; |
| 1713 | APSR.Z = IsZeroBit(result); |
| 1714 | APSR.C = carry; |
| 1715 | APSR.V = overflow; |
| 1716 | } |
| 1717 | #endif |
| 1718 | |
| 1719 | bool success = false; |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1720 | if (ConditionPassed(opcode)) |
Johnny Chen | 4c0e0bc | 2011-01-25 22:45:28 +0000 | [diff] [blame] | 1721 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1722 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | 4c0e0bc | 2011-01-25 22:45:28 +0000 | [diff] [blame] | 1723 | if (!success) |
| 1724 | return false; |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1725 | |
| 1726 | uint32_t Rd; |
| 1727 | bool setflags; |
Johnny Chen | 4c0e0bc | 2011-01-25 22:45:28 +0000 | [diff] [blame] | 1728 | uint32_t imm32; |
| 1729 | switch (encoding) { |
Johnny Chen | e445502 | 2011-01-26 00:08:59 +0000 | [diff] [blame] | 1730 | case eEncodingT1: |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1731 | Rd = 13; |
| 1732 | setflags = false; |
Johnny Chen | a695f95 | 2011-02-23 21:24:25 +0000 | [diff] [blame] | 1733 | imm32 = ThumbImm7Scaled(opcode); // imm32 = ZeroExtend(imm7:'00', 32) |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 1734 | break; |
Johnny Chen | 60c0d62 | 2011-01-25 23:49:39 +0000 | [diff] [blame] | 1735 | case eEncodingT2: |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1736 | Rd = Bits32(opcode, 11, 8); |
| 1737 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 60c0d62 | 2011-01-25 23:49:39 +0000 | [diff] [blame] | 1738 | imm32 = ThumbExpandImm(opcode); // imm32 = ThumbExpandImm(i:imm3:imm8) |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1739 | if (Rd == 15 && setflags) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1740 | return EmulateCMPImm(opcode, eEncodingT2); |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1741 | if (Rd == 15 && !setflags) |
| 1742 | return false; |
Johnny Chen | 60c0d62 | 2011-01-25 23:49:39 +0000 | [diff] [blame] | 1743 | break; |
| 1744 | case eEncodingT3: |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1745 | Rd = Bits32(opcode, 11, 8); |
| 1746 | setflags = false; |
Johnny Chen | 60c0d62 | 2011-01-25 23:49:39 +0000 | [diff] [blame] | 1747 | imm32 = ThumbImm12(opcode); // imm32 = ZeroExtend(i:imm3:imm8, 32) |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 1748 | if (Rd == 15) |
| 1749 | return false; |
Johnny Chen | 60c0d62 | 2011-01-25 23:49:39 +0000 | [diff] [blame] | 1750 | break; |
Johnny Chen | 4c0e0bc | 2011-01-25 22:45:28 +0000 | [diff] [blame] | 1751 | case eEncodingA1: |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1752 | Rd = Bits32(opcode, 15, 12); |
| 1753 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 60c0d62 | 2011-01-25 23:49:39 +0000 | [diff] [blame] | 1754 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 1755 | |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 1756 | // 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] | 1757 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 1758 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 4c0e0bc | 2011-01-25 22:45:28 +0000 | [diff] [blame] | 1759 | break; |
| 1760 | default: |
| 1761 | return false; |
| 1762 | } |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1763 | AddWithCarryResult res = AddWithCarry(sp, ~imm32, 1); |
| 1764 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1765 | EmulateInstruction::Context context; |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1766 | if (Rd == 13) |
| 1767 | { |
Caroline Tice | 2b03ed8 | 2011-03-16 00:06:12 +0000 | [diff] [blame] | 1768 | uint64_t imm64 = imm32; // Need to expand it to 64 bits before attempting to negate it, or the wrong |
| 1769 | // value gets passed down to context.SetImmediateSigned. |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1770 | context.type = EmulateInstruction::eContextAdjustStackPointer; |
Caroline Tice | 2b03ed8 | 2011-03-16 00:06:12 +0000 | [diff] [blame] | 1771 | context.SetImmediateSigned (-imm64); // the stack pointer offset |
Johnny Chen | c9e747f | 2011-02-23 01:55:07 +0000 | [diff] [blame] | 1772 | } |
| 1773 | else |
| 1774 | { |
| 1775 | context.type = EmulateInstruction::eContextImmediate; |
| 1776 | context.SetNoArgs (); |
| 1777 | } |
| 1778 | |
| 1779 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
Johnny Chen | 4c0e0bc | 2011-01-25 22:45:28 +0000 | [diff] [blame] | 1780 | return false; |
| 1781 | } |
| 1782 | return true; |
| 1783 | } |
| 1784 | |
Johnny Chen | 08c25e8 | 2011-01-31 18:02:28 +0000 | [diff] [blame] | 1785 | // A store operation to the stack that also updates the SP. |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1786 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1787 | EmulateInstructionARM::EmulateSTRRtSP (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1788 | { |
| 1789 | #if 0 |
| 1790 | // ARM pseudo code... |
| 1791 | if (ConditionPassed()) |
| 1792 | { |
| 1793 | EncodingSpecificOperations(); |
| 1794 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 1795 | address = if index then offset_addr else R[n]; |
| 1796 | MemU[address,4] = if t == 15 then PCStoreValue() else R[t]; |
| 1797 | if wback then R[n] = offset_addr; |
| 1798 | } |
| 1799 | #endif |
| 1800 | |
| 1801 | bool success = false; |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1802 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1803 | if (ConditionPassed(opcode)) |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1804 | { |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1805 | const uint32_t addr_byte_size = GetAddressByteSize(); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1806 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1807 | if (!success) |
| 1808 | return false; |
Johnny Chen | 91d9986 | 2011-01-25 19:07:04 +0000 | [diff] [blame] | 1809 | uint32_t Rt; // the source register |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1810 | uint32_t imm12; |
Caroline Tice | 3e40797 | 2011-03-18 19:41:00 +0000 | [diff] [blame] | 1811 | uint32_t Rn; // This function assumes Rn is the SP, but we should verify that. |
| 1812 | |
| 1813 | bool index; |
| 1814 | bool add; |
| 1815 | bool wback; |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1816 | switch (encoding) { |
| 1817 | case eEncodingA1: |
Johnny Chen | 108d5aa | 2011-01-26 01:00:55 +0000 | [diff] [blame] | 1818 | Rt = Bits32(opcode, 15, 12); |
| 1819 | imm12 = Bits32(opcode, 11, 0); |
Caroline Tice | 3e40797 | 2011-03-18 19:41:00 +0000 | [diff] [blame] | 1820 | Rn = Bits32 (opcode, 19, 16); |
| 1821 | |
| 1822 | if (Rn != 13) // 13 is the SP reg on ARM. Verify that Rn == SP. |
| 1823 | return false; |
| 1824 | |
| 1825 | index = BitIsSet (opcode, 24); |
| 1826 | add = BitIsSet (opcode, 23); |
| 1827 | wback = (BitIsClear (opcode, 24) || BitIsSet (opcode, 21)); |
| 1828 | |
| 1829 | if (wback && ((Rn == 15) || (Rn == Rt))) |
| 1830 | return false; |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1831 | break; |
| 1832 | default: |
| 1833 | return false; |
| 1834 | } |
Caroline Tice | 3e40797 | 2011-03-18 19:41:00 +0000 | [diff] [blame] | 1835 | addr_t offset_addr; |
| 1836 | if (add) |
| 1837 | offset_addr = sp + imm12; |
| 1838 | else |
| 1839 | offset_addr = sp - imm12; |
| 1840 | |
| 1841 | addr_t addr; |
| 1842 | if (index) |
| 1843 | addr = offset_addr; |
| 1844 | else |
| 1845 | addr = sp; |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1846 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1847 | EmulateInstruction::Context context; |
| 1848 | context.type = EmulateInstruction::eContextPushRegisterOnStack; |
Caroline Tice | 3e40797 | 2011-03-18 19:41:00 +0000 | [diff] [blame] | 1849 | Register sp_reg; |
| 1850 | sp_reg.SetRegister (eRegisterKindDWARF, dwarf_sp); |
| 1851 | context.SetRegisterPlusOffset (sp_reg, addr - sp); |
Johnny Chen | 91d9986 | 2011-01-25 19:07:04 +0000 | [diff] [blame] | 1852 | if (Rt != 15) |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1853 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1854 | uint32_t reg_value = ReadCoreReg(Rt, &success); |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1855 | if (!success) |
| 1856 | return false; |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 1857 | if (!MemUWrite (context, addr, reg_value, addr_byte_size)) |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1858 | return false; |
| 1859 | } |
| 1860 | else |
| 1861 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1862 | const uint32_t pc = ReadCoreReg(PC_REG, &success); |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1863 | if (!success) |
| 1864 | return false; |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 1865 | if (!MemUWrite (context, addr, pc, addr_byte_size)) |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1866 | return false; |
| 1867 | } |
| 1868 | |
Caroline Tice | 3e40797 | 2011-03-18 19:41:00 +0000 | [diff] [blame] | 1869 | |
| 1870 | if (wback) |
| 1871 | { |
| 1872 | context.type = EmulateInstruction::eContextAdjustStackPointer; |
| 1873 | context.SetImmediateSigned (addr - sp); |
| 1874 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP, offset_addr)) |
| 1875 | return false; |
| 1876 | } |
Johnny Chen | ce1ca77 | 2011-01-25 01:13:00 +0000 | [diff] [blame] | 1877 | } |
| 1878 | return true; |
| 1879 | } |
| 1880 | |
Johnny Chen | 08c25e8 | 2011-01-31 18:02:28 +0000 | [diff] [blame] | 1881 | // Vector Push stores multiple extension registers to the stack. |
| 1882 | // 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] | 1883 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1884 | EmulateInstructionARM::EmulateVPUSH (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1885 | { |
| 1886 | #if 0 |
| 1887 | // ARM pseudo code... |
| 1888 | if (ConditionPassed()) |
| 1889 | { |
| 1890 | EncodingSpecificOperations(); CheckVFPEnabled(TRUE); NullCheckIfThumbEE(13); |
| 1891 | address = SP - imm32; |
| 1892 | SP = SP - imm32; |
| 1893 | if single_regs then |
| 1894 | for r = 0 to regs-1 |
| 1895 | MemA[address,4] = S[d+r]; address = address+4; |
| 1896 | else |
| 1897 | for r = 0 to regs-1 |
| 1898 | // Store as two word-aligned words in the correct order for current endianness. |
| 1899 | MemA[address,4] = if BigEndian() then D[d+r]<63:32> else D[d+r]<31:0>; |
| 1900 | MemA[address+4,4] = if BigEndian() then D[d+r]<31:0> else D[d+r]<63:32>; |
| 1901 | address = address+8; |
| 1902 | } |
| 1903 | #endif |
| 1904 | |
| 1905 | bool success = false; |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1906 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1907 | if (ConditionPassed(opcode)) |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1908 | { |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1909 | const uint32_t addr_byte_size = GetAddressByteSize(); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 1910 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1911 | if (!success) |
| 1912 | return false; |
| 1913 | bool single_regs; |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 1914 | uint32_t d; // UInt(D:Vd) or UInt(Vd:D) starting register |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1915 | uint32_t imm32; // stack offset |
| 1916 | uint32_t regs; // number of registers |
| 1917 | switch (encoding) { |
| 1918 | case eEncodingT1: |
| 1919 | case eEncodingA1: |
| 1920 | single_regs = false; |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 1921 | d = Bit32(opcode, 22) << 4 | Bits32(opcode, 15, 12); |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1922 | imm32 = Bits32(opcode, 7, 0) * addr_byte_size; |
| 1923 | // If UInt(imm8) is odd, see "FSTMX". |
| 1924 | regs = Bits32(opcode, 7, 0) / 2; |
| 1925 | // if regs == 0 || regs > 16 || (d+regs) > 32 then UNPREDICTABLE; |
| 1926 | if (regs == 0 || regs > 16 || (d + regs) > 32) |
| 1927 | return false; |
| 1928 | break; |
| 1929 | case eEncodingT2: |
| 1930 | case eEncodingA2: |
| 1931 | single_regs = true; |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 1932 | d = Bits32(opcode, 15, 12) << 1 | Bit32(opcode, 22); |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1933 | imm32 = Bits32(opcode, 7, 0) * addr_byte_size; |
| 1934 | regs = Bits32(opcode, 7, 0); |
| 1935 | // if regs == 0 || regs > 16 || (d+regs) > 32 then UNPREDICTABLE; |
| 1936 | if (regs == 0 || regs > 16 || (d + regs) > 32) |
| 1937 | return false; |
| 1938 | break; |
| 1939 | default: |
| 1940 | return false; |
| 1941 | } |
| 1942 | uint32_t start_reg = single_regs ? dwarf_s0 : dwarf_d0; |
| 1943 | uint32_t reg_byte_size = single_regs ? addr_byte_size : addr_byte_size * 2; |
| 1944 | addr_t sp_offset = imm32; |
| 1945 | addr_t addr = sp - sp_offset; |
| 1946 | uint32_t i; |
| 1947 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1948 | EmulateInstruction::Context context; |
| 1949 | context.type = EmulateInstruction::eContextPushRegisterOnStack; |
| 1950 | Register dwarf_reg; |
| 1951 | dwarf_reg.SetRegister (eRegisterKindDWARF, 0); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1952 | Register sp_reg; |
| 1953 | sp_reg.SetRegister (eRegisterKindDWARF, dwarf_sp); |
| 1954 | for (i=0; i<regs; ++i) |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1955 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 1956 | dwarf_reg.num = start_reg + d + i; |
| 1957 | context.SetRegisterToRegisterPlusOffset ( dwarf_reg, sp_reg, addr - sp); |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1958 | // uint64_t to accommodate 64-bit registers. |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1959 | uint64_t reg_value = ReadRegisterUnsigned(eRegisterKindDWARF, dwarf_reg.num, 0, &success); |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1960 | if (!success) |
| 1961 | return false; |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 1962 | if (!MemAWrite (context, addr, reg_value, reg_byte_size)) |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1963 | return false; |
| 1964 | addr += reg_byte_size; |
| 1965 | } |
| 1966 | |
| 1967 | context.type = EmulateInstruction::eContextAdjustStackPointer; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 1968 | context.SetImmediateSigned (-sp_offset); |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1969 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 1970 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP, sp - sp_offset)) |
Johnny Chen | 799dfd0 | 2011-01-26 23:14:33 +0000 | [diff] [blame] | 1971 | return false; |
| 1972 | } |
| 1973 | return true; |
| 1974 | } |
| 1975 | |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 1976 | // Vector Pop loads multiple extension registers from the stack. |
| 1977 | // It also updates SP to point just above the loaded data. |
| 1978 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 1979 | EmulateInstructionARM::EmulateVPOP (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 1980 | { |
| 1981 | #if 0 |
| 1982 | // ARM pseudo code... |
| 1983 | if (ConditionPassed()) |
| 1984 | { |
| 1985 | EncodingSpecificOperations(); CheckVFPEnabled(TRUE); NullCheckIfThumbEE(13); |
| 1986 | address = SP; |
| 1987 | SP = SP + imm32; |
| 1988 | if single_regs then |
| 1989 | for r = 0 to regs-1 |
| 1990 | S[d+r] = MemA[address,4]; address = address+4; |
| 1991 | else |
| 1992 | for r = 0 to regs-1 |
| 1993 | word1 = MemA[address,4]; word2 = MemA[address+4,4]; address = address+8; |
| 1994 | // Combine the word-aligned words in the correct order for current endianness. |
| 1995 | D[d+r] = if BigEndian() then word1:word2 else word2:word1; |
| 1996 | } |
| 1997 | #endif |
| 1998 | |
| 1999 | bool success = false; |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2000 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2001 | if (ConditionPassed(opcode)) |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2002 | { |
| 2003 | const uint32_t addr_byte_size = GetAddressByteSize(); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2004 | const addr_t sp = ReadCoreReg (SP_REG, &success); |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2005 | if (!success) |
| 2006 | return false; |
| 2007 | bool single_regs; |
| 2008 | uint32_t d; // UInt(D:Vd) or UInt(Vd:D) starting register |
| 2009 | uint32_t imm32; // stack offset |
| 2010 | uint32_t regs; // number of registers |
| 2011 | switch (encoding) { |
| 2012 | case eEncodingT1: |
| 2013 | case eEncodingA1: |
| 2014 | single_regs = false; |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 2015 | d = Bit32(opcode, 22) << 4 | Bits32(opcode, 15, 12); |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2016 | imm32 = Bits32(opcode, 7, 0) * addr_byte_size; |
| 2017 | // If UInt(imm8) is odd, see "FLDMX". |
| 2018 | regs = Bits32(opcode, 7, 0) / 2; |
| 2019 | // if regs == 0 || regs > 16 || (d+regs) > 32 then UNPREDICTABLE; |
| 2020 | if (regs == 0 || regs > 16 || (d + regs) > 32) |
| 2021 | return false; |
| 2022 | break; |
| 2023 | case eEncodingT2: |
| 2024 | case eEncodingA2: |
| 2025 | single_regs = true; |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 2026 | d = Bits32(opcode, 15, 12) << 1 | Bit32(opcode, 22); |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2027 | imm32 = Bits32(opcode, 7, 0) * addr_byte_size; |
| 2028 | regs = Bits32(opcode, 7, 0); |
| 2029 | // if regs == 0 || regs > 16 || (d+regs) > 32 then UNPREDICTABLE; |
| 2030 | if (regs == 0 || regs > 16 || (d + regs) > 32) |
| 2031 | return false; |
| 2032 | break; |
| 2033 | default: |
| 2034 | return false; |
| 2035 | } |
| 2036 | uint32_t start_reg = single_regs ? dwarf_s0 : dwarf_d0; |
| 2037 | uint32_t reg_byte_size = single_regs ? addr_byte_size : addr_byte_size * 2; |
| 2038 | addr_t sp_offset = imm32; |
| 2039 | addr_t addr = sp; |
| 2040 | uint32_t i; |
| 2041 | uint64_t data; // uint64_t to accomodate 64-bit registers. |
| 2042 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2043 | EmulateInstruction::Context context; |
| 2044 | context.type = EmulateInstruction::eContextPopRegisterOffStack; |
| 2045 | Register dwarf_reg; |
| 2046 | dwarf_reg.SetRegister (eRegisterKindDWARF, 0); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 2047 | Register sp_reg; |
| 2048 | sp_reg.SetRegister (eRegisterKindDWARF, dwarf_sp); |
| 2049 | for (i=0; i<regs; ++i) |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2050 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 2051 | dwarf_reg.num = start_reg + d + i; |
| 2052 | context.SetRegisterPlusOffset (sp_reg, addr - sp); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 2053 | data = MemARead(context, addr, reg_byte_size, 0, &success); |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2054 | if (!success) |
| 2055 | return false; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2056 | if (!WriteRegisterUnsigned(context, eRegisterKindDWARF, dwarf_reg.num, data)) |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2057 | return false; |
| 2058 | addr += reg_byte_size; |
| 2059 | } |
| 2060 | |
| 2061 | context.type = EmulateInstruction::eContextAdjustStackPointer; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2062 | context.SetImmediateSigned (sp_offset); |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 2063 | |
| 2064 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP, sp + sp_offset)) |
| 2065 | return false; |
| 2066 | } |
| 2067 | return true; |
| 2068 | } |
| 2069 | |
Johnny Chen | b77be41 | 2011-02-04 00:40:18 +0000 | [diff] [blame] | 2070 | // SVC (previously SWI) |
| 2071 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2072 | EmulateInstructionARM::EmulateSVC (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | b77be41 | 2011-02-04 00:40:18 +0000 | [diff] [blame] | 2073 | { |
| 2074 | #if 0 |
| 2075 | // ARM pseudo code... |
| 2076 | if (ConditionPassed()) |
| 2077 | { |
| 2078 | EncodingSpecificOperations(); |
| 2079 | CallSupervisor(); |
| 2080 | } |
| 2081 | #endif |
| 2082 | |
| 2083 | bool success = false; |
Johnny Chen | b77be41 | 2011-02-04 00:40:18 +0000 | [diff] [blame] | 2084 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2085 | if (ConditionPassed(opcode)) |
Johnny Chen | b77be41 | 2011-02-04 00:40:18 +0000 | [diff] [blame] | 2086 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2087 | const uint32_t pc = ReadCoreReg(PC_REG, &success); |
Johnny Chen | b77be41 | 2011-02-04 00:40:18 +0000 | [diff] [blame] | 2088 | addr_t lr; // next instruction address |
| 2089 | if (!success) |
| 2090 | return false; |
| 2091 | uint32_t imm32; // the immediate constant |
| 2092 | uint32_t mode; // ARM or Thumb mode |
| 2093 | switch (encoding) { |
| 2094 | case eEncodingT1: |
| 2095 | lr = (pc + 2) | 1u; // return address |
| 2096 | imm32 = Bits32(opcode, 7, 0); |
| 2097 | mode = eModeThumb; |
| 2098 | break; |
| 2099 | case eEncodingA1: |
| 2100 | lr = pc + 4; // return address |
| 2101 | imm32 = Bits32(opcode, 23, 0); |
| 2102 | mode = eModeARM; |
| 2103 | break; |
| 2104 | default: |
| 2105 | return false; |
| 2106 | } |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2107 | |
| 2108 | EmulateInstruction::Context context; |
| 2109 | context.type = EmulateInstruction::eContextSupervisorCall; |
| 2110 | context.SetModeAndImmediate (mode, imm32); |
Johnny Chen | b77be41 | 2011-02-04 00:40:18 +0000 | [diff] [blame] | 2111 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_RA, lr)) |
| 2112 | return false; |
| 2113 | } |
| 2114 | return true; |
| 2115 | } |
| 2116 | |
Johnny Chen | c315f86 | 2011-02-05 00:46:10 +0000 | [diff] [blame] | 2117 | // If Then makes up to four following instructions (the IT block) conditional. |
| 2118 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2119 | EmulateInstructionARM::EmulateIT (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | c315f86 | 2011-02-05 00:46:10 +0000 | [diff] [blame] | 2120 | { |
| 2121 | #if 0 |
| 2122 | // ARM pseudo code... |
| 2123 | EncodingSpecificOperations(); |
| 2124 | ITSTATE.IT<7:0> = firstcond:mask; |
| 2125 | #endif |
| 2126 | |
Johnny Chen | c315f86 | 2011-02-05 00:46:10 +0000 | [diff] [blame] | 2127 | m_it_session.InitIT(Bits32(opcode, 7, 0)); |
| 2128 | return true; |
| 2129 | } |
| 2130 | |
Johnny Chen | 3b620b3 | 2011-02-07 20:11:47 +0000 | [diff] [blame] | 2131 | // Branch causes a branch to a target address. |
| 2132 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2133 | EmulateInstructionARM::EmulateB (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 3b620b3 | 2011-02-07 20:11:47 +0000 | [diff] [blame] | 2134 | { |
| 2135 | #if 0 |
| 2136 | // ARM pseudo code... |
| 2137 | if (ConditionPassed()) |
| 2138 | { |
| 2139 | EncodingSpecificOperations(); |
| 2140 | BranchWritePC(PC + imm32); |
| 2141 | } |
| 2142 | #endif |
| 2143 | |
| 2144 | bool success = false; |
Johnny Chen | 3b620b3 | 2011-02-07 20:11:47 +0000 | [diff] [blame] | 2145 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2146 | if (ConditionPassed(opcode)) |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2147 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2148 | EmulateInstruction::Context context; |
| 2149 | context.type = EmulateInstruction::eContextRelativeBranchImmediate; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2150 | const uint32_t pc = ReadCoreReg(PC_REG, &success); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2151 | if (!success) |
| 2152 | return false; |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2153 | addr_t target; // target address |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2154 | int32_t imm32; // PC-relative offset |
| 2155 | switch (encoding) { |
| 2156 | case eEncodingT1: |
| 2157 | // The 'cond' field is handled in EmulateInstructionARM::CurrentCond(). |
| 2158 | imm32 = llvm::SignExtend32<9>(Bits32(opcode, 7, 0) << 1); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2159 | target = pc + imm32; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2160 | context.SetModeAndImmediateSigned (eModeThumb, 4 + imm32); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2161 | break; |
| 2162 | case eEncodingT2: |
| 2163 | imm32 = llvm::SignExtend32<12>(Bits32(opcode, 10, 0)); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2164 | target = pc + imm32; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2165 | context.SetModeAndImmediateSigned (eModeThumb, 4 + imm32); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2166 | break; |
| 2167 | case eEncodingT3: |
| 2168 | // The 'cond' field is handled in EmulateInstructionARM::CurrentCond(). |
| 2169 | { |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 2170 | uint32_t S = Bit32(opcode, 26); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2171 | uint32_t imm6 = Bits32(opcode, 21, 16); |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 2172 | uint32_t J1 = Bit32(opcode, 13); |
| 2173 | uint32_t J2 = Bit32(opcode, 11); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2174 | uint32_t imm11 = Bits32(opcode, 10, 0); |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2175 | 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] | 2176 | imm32 = llvm::SignExtend32<21>(imm21); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2177 | target = pc + imm32; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2178 | context.SetModeAndImmediateSigned (eModeThumb, 4 + imm32); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2179 | break; |
| 2180 | } |
| 2181 | case eEncodingT4: |
| 2182 | { |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 2183 | uint32_t S = Bit32(opcode, 26); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2184 | uint32_t imm10 = Bits32(opcode, 25, 16); |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 2185 | uint32_t J1 = Bit32(opcode, 13); |
| 2186 | uint32_t J2 = Bit32(opcode, 11); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2187 | uint32_t imm11 = Bits32(opcode, 10, 0); |
| 2188 | uint32_t I1 = !(J1 ^ S); |
| 2189 | uint32_t I2 = !(J2 ^ S); |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2190 | 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] | 2191 | imm32 = llvm::SignExtend32<25>(imm25); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2192 | target = pc + imm32; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2193 | context.SetModeAndImmediateSigned (eModeThumb, 4 + imm32); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2194 | break; |
| 2195 | } |
| 2196 | case eEncodingA1: |
| 2197 | imm32 = llvm::SignExtend32<26>(Bits32(opcode, 23, 0) << 2); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2198 | target = pc + imm32; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2199 | context.SetModeAndImmediateSigned (eModeARM, 8 + imm32); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 2200 | break; |
| 2201 | default: |
| 2202 | return false; |
| 2203 | } |
| 2204 | if (!BranchWritePC(context, target)) |
| 2205 | return false; |
| 2206 | } |
| 2207 | return true; |
Johnny Chen | 3b620b3 | 2011-02-07 20:11:47 +0000 | [diff] [blame] | 2208 | } |
| 2209 | |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2210 | // Compare and Branch on Nonzero and Compare and Branch on Zero compare the value in a register with |
| 2211 | // zero and conditionally branch forward a constant value. They do not affect the condition flags. |
| 2212 | // CBNZ, CBZ |
| 2213 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2214 | EmulateInstructionARM::EmulateCB (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2215 | { |
| 2216 | #if 0 |
| 2217 | // ARM pseudo code... |
| 2218 | EncodingSpecificOperations(); |
| 2219 | if nonzero ^ IsZero(R[n]) then |
| 2220 | BranchWritePC(PC + imm32); |
| 2221 | #endif |
| 2222 | |
| 2223 | bool success = false; |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2224 | |
| 2225 | // Read the register value from the operand register Rn. |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2226 | uint32_t reg_val = ReadCoreReg(Bits32(opcode, 2, 0), &success); |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2227 | if (!success) |
| 2228 | return false; |
| 2229 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2230 | EmulateInstruction::Context context; |
| 2231 | context.type = EmulateInstruction::eContextRelativeBranchImmediate; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2232 | const uint32_t pc = ReadCoreReg(PC_REG, &success); |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2233 | if (!success) |
| 2234 | return false; |
| 2235 | |
| 2236 | addr_t target; // target address |
| 2237 | uint32_t imm32; // PC-relative offset to branch forward |
| 2238 | bool nonzero; |
| 2239 | switch (encoding) { |
| 2240 | case eEncodingT1: |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 2241 | imm32 = Bit32(opcode, 9) << 6 | Bits32(opcode, 7, 3) << 1; |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2242 | nonzero = BitIsSet(opcode, 11); |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2243 | target = pc + imm32; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2244 | context.SetModeAndImmediateSigned (eModeThumb, 4 + imm32); |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 2245 | break; |
| 2246 | default: |
| 2247 | return false; |
| 2248 | } |
| 2249 | if (nonzero ^ (reg_val == 0)) |
| 2250 | if (!BranchWritePC(context, target)) |
| 2251 | return false; |
| 2252 | |
| 2253 | return true; |
| 2254 | } |
| 2255 | |
Johnny Chen | 60299ec | 2011-02-17 19:34:27 +0000 | [diff] [blame] | 2256 | // Table Branch Byte causes a PC-relative forward branch using a table of single byte offsets. |
| 2257 | // A base register provides a pointer to the table, and a second register supplies an index into the table. |
| 2258 | // The branch length is twice the value of the byte returned from the table. |
| 2259 | // |
| 2260 | // Table Branch Halfword causes a PC-relative forward branch using a table of single halfword offsets. |
| 2261 | // A base register provides a pointer to the table, and a second register supplies an index into the table. |
| 2262 | // The branch length is twice the value of the halfword returned from the table. |
| 2263 | // TBB, TBH |
| 2264 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2265 | EmulateInstructionARM::EmulateTB (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 60299ec | 2011-02-17 19:34:27 +0000 | [diff] [blame] | 2266 | { |
| 2267 | #if 0 |
| 2268 | // ARM pseudo code... |
| 2269 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 2270 | if is_tbh then |
| 2271 | halfwords = UInt(MemU[R[n]+LSL(R[m],1), 2]); |
| 2272 | else |
| 2273 | halfwords = UInt(MemU[R[n]+R[m], 1]); |
| 2274 | BranchWritePC(PC + 2*halfwords); |
| 2275 | #endif |
| 2276 | |
| 2277 | bool success = false; |
Johnny Chen | 60299ec | 2011-02-17 19:34:27 +0000 | [diff] [blame] | 2278 | |
| 2279 | uint32_t Rn; // the base register which contains the address of the table of branch lengths |
| 2280 | uint32_t Rm; // the index register which contains an integer pointing to a byte/halfword in the table |
| 2281 | bool is_tbh; // true if table branch halfword |
| 2282 | switch (encoding) { |
| 2283 | case eEncodingT1: |
| 2284 | Rn = Bits32(opcode, 19, 16); |
| 2285 | Rm = Bits32(opcode, 3, 0); |
| 2286 | is_tbh = BitIsSet(opcode, 4); |
| 2287 | if (Rn == 13 || BadReg(Rm)) |
| 2288 | return false; |
| 2289 | if (InITBlock() && !LastInITBlock()) |
| 2290 | return false; |
| 2291 | break; |
| 2292 | default: |
| 2293 | return false; |
| 2294 | } |
| 2295 | |
| 2296 | // Read the address of the table from the operand register Rn. |
| 2297 | // 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] | 2298 | uint32_t base = ReadCoreReg(Rm, &success); |
Johnny Chen | 60299ec | 2011-02-17 19:34:27 +0000 | [diff] [blame] | 2299 | if (!success) |
| 2300 | return false; |
| 2301 | |
| 2302 | // the table index |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2303 | uint32_t index = ReadCoreReg(Rm, &success); |
Johnny Chen | 60299ec | 2011-02-17 19:34:27 +0000 | [diff] [blame] | 2304 | if (!success) |
| 2305 | return false; |
| 2306 | |
| 2307 | // the offsetted table address |
| 2308 | addr_t addr = base + (is_tbh ? index*2 : index); |
| 2309 | |
| 2310 | // PC-relative offset to branch forward |
| 2311 | EmulateInstruction::Context context; |
| 2312 | context.type = EmulateInstruction::eContextTableBranchReadMemory; |
Johnny Chen | 104c8b6 | 2011-02-17 23:27:44 +0000 | [diff] [blame] | 2313 | 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] | 2314 | if (!success) |
| 2315 | return false; |
| 2316 | |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2317 | const uint32_t pc = ReadCoreReg(PC_REG, &success); |
Johnny Chen | 60299ec | 2011-02-17 19:34:27 +0000 | [diff] [blame] | 2318 | if (!success) |
| 2319 | return false; |
| 2320 | |
| 2321 | // target address |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2322 | addr_t target = pc + offset; |
Johnny Chen | 60299ec | 2011-02-17 19:34:27 +0000 | [diff] [blame] | 2323 | context.type = EmulateInstruction::eContextRelativeBranchImmediate; |
| 2324 | context.SetModeAndImmediateSigned (eModeThumb, 4 + offset); |
| 2325 | |
| 2326 | if (!BranchWritePC(context, target)) |
| 2327 | return false; |
| 2328 | |
| 2329 | return true; |
| 2330 | } |
| 2331 | |
Caroline Tice | dcc11b3 | 2011-03-02 23:57:02 +0000 | [diff] [blame] | 2332 | // This instruction adds an immediate value to a register value, and writes the result to the destination register. |
| 2333 | // It can optionally update the condition flags based on the result. |
| 2334 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2335 | EmulateInstructionARM::EmulateADDImmThumb (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | dcc11b3 | 2011-03-02 23:57:02 +0000 | [diff] [blame] | 2336 | { |
| 2337 | #if 0 |
| 2338 | if ConditionPassed() then |
| 2339 | EncodingSpecificOperations(); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 2340 | (result, carry, overflow) = AddWithCarry(R[n], imm32, '0'); |
Caroline Tice | dcc11b3 | 2011-03-02 23:57:02 +0000 | [diff] [blame] | 2341 | R[d] = result; |
| 2342 | if setflags then |
| 2343 | APSR.N = result<31>; |
| 2344 | APSR.Z = IsZeroBit(result); |
| 2345 | APSR.C = carry; |
| 2346 | APSR.V = overflow; |
| 2347 | #endif |
| 2348 | |
| 2349 | bool success = false; |
Caroline Tice | dcc11b3 | 2011-03-02 23:57:02 +0000 | [diff] [blame] | 2350 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2351 | if (ConditionPassed(opcode)) |
Caroline Tice | dcc11b3 | 2011-03-02 23:57:02 +0000 | [diff] [blame] | 2352 | { |
| 2353 | uint32_t d; |
| 2354 | uint32_t n; |
| 2355 | bool setflags; |
| 2356 | uint32_t imm32; |
| 2357 | uint32_t carry_out; |
| 2358 | |
| 2359 | //EncodingSpecificOperations(); |
| 2360 | switch (encoding) |
| 2361 | { |
| 2362 | case eEncodingT1: |
| 2363 | // d = UInt(Rd); n = UInt(Rn); setflags = !InITBlock(); imm32 = ZeroExtend(imm3, 32); |
| 2364 | d = Bits32 (opcode, 2, 0); |
| 2365 | n = Bits32 (opcode, 5, 3); |
| 2366 | setflags = !InITBlock(); |
| 2367 | imm32 = Bits32 (opcode, 8,6); |
| 2368 | |
| 2369 | break; |
| 2370 | |
| 2371 | case eEncodingT2: |
| 2372 | // d = UInt(Rdn); n = UInt(Rdn); setflags = !InITBlock(); imm32 = ZeroExtend(imm8, 32); |
| 2373 | d = Bits32 (opcode, 10, 8); |
| 2374 | n = Bits32 (opcode, 10, 8); |
| 2375 | setflags = !InITBlock(); |
| 2376 | imm32 = Bits32 (opcode, 7, 0); |
| 2377 | |
| 2378 | break; |
| 2379 | |
| 2380 | case eEncodingT3: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 2381 | // if Rd == '1111' && S == '1' then SEE CMN (immediate); |
| 2382 | // if Rn == '1101' then SEE ADD (SP plus immediate); |
| 2383 | // 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] | 2384 | d = Bits32 (opcode, 11, 8); |
| 2385 | n = Bits32 (opcode, 19, 16); |
| 2386 | setflags = BitIsSet (opcode, 20); |
| 2387 | imm32 = ThumbExpandImm_C (opcode, APSR_C, carry_out); |
| 2388 | |
| 2389 | // if BadReg(d) || n == 15 then UNPREDICTABLE; |
| 2390 | if (BadReg (d) || (n == 15)) |
| 2391 | return false; |
| 2392 | |
| 2393 | break; |
| 2394 | |
| 2395 | case eEncodingT4: |
| 2396 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 2397 | // if Rn == '1111' then SEE ADR; |
| 2398 | // if Rn == '1101' then SEE ADD (SP plus immediate); |
Caroline Tice | dcc11b3 | 2011-03-02 23:57:02 +0000 | [diff] [blame] | 2399 | // d = UInt(Rd); n = UInt(Rn); setflags = FALSE; imm32 = ZeroExtend(i:imm3:imm8, 32); |
| 2400 | d = Bits32 (opcode, 11, 8); |
| 2401 | n = Bits32 (opcode, 19, 16); |
| 2402 | setflags = false; |
| 2403 | uint32_t i = Bit32 (opcode, 26); |
| 2404 | uint32_t imm3 = Bits32 (opcode, 14, 12); |
| 2405 | uint32_t imm8 = Bits32 (opcode, 7, 0); |
| 2406 | imm32 = (i << 11) | (imm3 << 8) | imm8; |
| 2407 | |
| 2408 | // if BadReg(d) then UNPREDICTABLE; |
| 2409 | if (BadReg (d)) |
| 2410 | return false; |
| 2411 | |
| 2412 | break; |
| 2413 | } |
| 2414 | default: |
| 2415 | return false; |
| 2416 | } |
| 2417 | |
| 2418 | uint64_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 2419 | if (!success) |
| 2420 | return false; |
| 2421 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 2422 | //(result, carry, overflow) = AddWithCarry(R[n], imm32, '0'); |
Caroline Tice | dcc11b3 | 2011-03-02 23:57:02 +0000 | [diff] [blame] | 2423 | AddWithCarryResult res = AddWithCarry (Rn, imm32, 0); |
| 2424 | |
| 2425 | Register reg_n; |
| 2426 | reg_n.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 2427 | |
| 2428 | EmulateInstruction::Context context; |
| 2429 | context.type = eContextAddition; |
| 2430 | context.SetRegisterPlusOffset (reg_n, imm32); |
| 2431 | |
| 2432 | //R[d] = result; |
| 2433 | //if setflags then |
| 2434 | //APSR.N = result<31>; |
| 2435 | //APSR.Z = IsZeroBit(result); |
| 2436 | //APSR.C = carry; |
| 2437 | //APSR.V = overflow; |
| 2438 | if (!WriteCoreRegOptionalFlags (context, res.result, d, setflags, res.carry_out, res.overflow)) |
| 2439 | return false; |
| 2440 | |
| 2441 | } |
| 2442 | return true; |
| 2443 | } |
| 2444 | |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2445 | // This instruction adds an immediate value to a register value, and writes the result to the destination |
| 2446 | // register. It can optionally update the condition flags based on the result. |
| 2447 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2448 | EmulateInstructionARM::EmulateADDImmARM (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2449 | { |
| 2450 | #if 0 |
| 2451 | // ARM pseudo code... |
| 2452 | if ConditionPassed() then |
| 2453 | EncodingSpecificOperations(); |
| 2454 | (result, carry, overflow) = AddWithCarry(R[n], imm32, '0'); |
| 2455 | if d == 15 then |
| 2456 | ALUWritePC(result); // setflags is always FALSE here |
| 2457 | else |
| 2458 | R[d] = result; |
| 2459 | if setflags then |
| 2460 | APSR.N = result<31>; |
| 2461 | APSR.Z = IsZeroBit(result); |
| 2462 | APSR.C = carry; |
| 2463 | APSR.V = overflow; |
| 2464 | #endif |
| 2465 | |
| 2466 | bool success = false; |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2467 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2468 | if (ConditionPassed(opcode)) |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2469 | { |
| 2470 | uint32_t Rd, Rn; |
| 2471 | uint32_t imm32; // the immediate value to be added to the value obtained from Rn |
| 2472 | bool setflags; |
| 2473 | switch (encoding) |
| 2474 | { |
| 2475 | case eEncodingA1: |
| 2476 | Rd = Bits32(opcode, 15, 12); |
| 2477 | Rn = Bits32(opcode, 19, 16); |
| 2478 | setflags = BitIsSet(opcode, 20); |
| 2479 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
| 2480 | break; |
| 2481 | default: |
| 2482 | return false; |
| 2483 | } |
| 2484 | |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2485 | // Read the first operand. |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 2486 | uint32_t val1 = ReadCoreReg(Rn, &success); |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2487 | if (!success) |
| 2488 | return false; |
| 2489 | |
| 2490 | AddWithCarryResult res = AddWithCarry(val1, imm32, 0); |
| 2491 | |
| 2492 | EmulateInstruction::Context context; |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 2493 | context.type = EmulateInstruction::eContextAddition; |
| 2494 | Register dwarf_reg; |
| 2495 | dwarf_reg.SetRegister (eRegisterKindDWARF, Rn); |
| 2496 | context.SetRegisterPlusOffset (dwarf_reg, imm32); |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2497 | |
| 2498 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 2499 | return false; |
| 2500 | } |
| 2501 | return true; |
| 2502 | } |
| 2503 | |
Johnny Chen | d761dcf | 2011-02-17 22:03:29 +0000 | [diff] [blame] | 2504 | // This instruction adds a register value and an optionally-shifted register value, and writes the result |
| 2505 | // 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] | 2506 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2507 | EmulateInstructionARM::EmulateADDReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2508 | { |
| 2509 | #if 0 |
| 2510 | // ARM pseudo code... |
| 2511 | if ConditionPassed() then |
| 2512 | EncodingSpecificOperations(); |
| 2513 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 2514 | (result, carry, overflow) = AddWithCarry(R[n], shifted, '0'); |
| 2515 | if d == 15 then |
| 2516 | ALUWritePC(result); // setflags is always FALSE here |
| 2517 | else |
| 2518 | R[d] = result; |
| 2519 | if setflags then |
| 2520 | APSR.N = result<31>; |
| 2521 | APSR.Z = IsZeroBit(result); |
| 2522 | APSR.C = carry; |
| 2523 | APSR.V = overflow; |
| 2524 | #endif |
| 2525 | |
| 2526 | bool success = false; |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2527 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2528 | if (ConditionPassed(opcode)) |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2529 | { |
| 2530 | uint32_t Rd, Rn, Rm; |
Johnny Chen | d761dcf | 2011-02-17 22:03:29 +0000 | [diff] [blame] | 2531 | ARM_ShifterType shift_t; |
| 2532 | 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] | 2533 | bool setflags; |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2534 | switch (encoding) |
| 2535 | { |
Johnny Chen | d761dcf | 2011-02-17 22:03:29 +0000 | [diff] [blame] | 2536 | case eEncodingT1: |
| 2537 | Rd = Bits32(opcode, 2, 0); |
| 2538 | Rn = Bits32(opcode, 5, 3); |
| 2539 | Rm = Bits32(opcode, 8, 6); |
| 2540 | setflags = !InITBlock(); |
| 2541 | shift_t = SRType_LSL; |
| 2542 | shift_n = 0; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 2543 | break; |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2544 | case eEncodingT2: |
Johnny Chen | bd59990 | 2011-02-10 21:39:01 +0000 | [diff] [blame] | 2545 | Rd = Rn = Bit32(opcode, 7) << 3 | Bits32(opcode, 2, 0); |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2546 | Rm = Bits32(opcode, 6, 3); |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 2547 | setflags = false; |
Johnny Chen | d761dcf | 2011-02-17 22:03:29 +0000 | [diff] [blame] | 2548 | shift_t = SRType_LSL; |
| 2549 | shift_n = 0; |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2550 | if (Rn == 15 && Rm == 15) |
| 2551 | return false; |
Johnny Chen | d761dcf | 2011-02-17 22:03:29 +0000 | [diff] [blame] | 2552 | if (Rd == 15 && InITBlock() && !LastInITBlock()) |
| 2553 | return false; |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2554 | break; |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2555 | case eEncodingA1: |
| 2556 | Rd = Bits32(opcode, 15, 12); |
| 2557 | Rn = Bits32(opcode, 19, 16); |
| 2558 | Rm = Bits32(opcode, 3, 0); |
| 2559 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 2560 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2561 | break; |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2562 | default: |
| 2563 | return false; |
| 2564 | } |
| 2565 | |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2566 | // Read the first operand. |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 2567 | uint32_t val1 = ReadCoreReg(Rn, &success); |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2568 | if (!success) |
| 2569 | return false; |
| 2570 | |
| 2571 | // Read the second operand. |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 2572 | uint32_t val2 = ReadCoreReg(Rm, &success); |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2573 | if (!success) |
| 2574 | return false; |
| 2575 | |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 2576 | uint32_t shifted = Shift(val2, shift_t, shift_n, APSR_C); |
Johnny Chen | 8fa2059 | 2011-02-18 01:22:22 +0000 | [diff] [blame] | 2577 | AddWithCarryResult res = AddWithCarry(val1, shifted, 0); |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2578 | |
| 2579 | EmulateInstruction::Context context; |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 2580 | context.type = EmulateInstruction::eContextAddition; |
| 2581 | Register op1_reg; |
| 2582 | Register op2_reg; |
| 2583 | op1_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + Rn); |
| 2584 | op2_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + Rm); |
| 2585 | context.SetRegisterRegisterOperands (op1_reg, op2_reg); |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 2586 | |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 2587 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 2588 | return false; |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 2589 | } |
| 2590 | return true; |
| 2591 | } |
| 2592 | |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2593 | // Compare Negative (immediate) adds a register value and an immediate value. |
| 2594 | // 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] | 2595 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2596 | EmulateInstructionARM::EmulateCMNImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2597 | { |
| 2598 | #if 0 |
| 2599 | // ARM pseudo code... |
| 2600 | if ConditionPassed() then |
| 2601 | EncodingSpecificOperations(); |
| 2602 | (result, carry, overflow) = AddWithCarry(R[n], imm32, '0'); |
| 2603 | APSR.N = result<31>; |
| 2604 | APSR.Z = IsZeroBit(result); |
| 2605 | APSR.C = carry; |
| 2606 | APSR.V = overflow; |
| 2607 | #endif |
| 2608 | |
| 2609 | bool success = false; |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2610 | |
| 2611 | uint32_t Rn; // the first operand |
| 2612 | uint32_t imm32; // the immediate value to be compared with |
| 2613 | switch (encoding) { |
| 2614 | case eEncodingT1: |
Johnny Chen | 078fbc6 | 2011-02-22 19:48:22 +0000 | [diff] [blame] | 2615 | Rn = Bits32(opcode, 19, 16); |
| 2616 | imm32 = ThumbExpandImm(opcode); // imm32 = ThumbExpandImm(i:imm3:imm8) |
| 2617 | if (Rn == 15) |
| 2618 | return false; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 2619 | break; |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2620 | case eEncodingA1: |
| 2621 | Rn = Bits32(opcode, 19, 16); |
| 2622 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
| 2623 | break; |
| 2624 | default: |
| 2625 | return false; |
| 2626 | } |
| 2627 | // Read the register value from the operand register Rn. |
| 2628 | uint32_t reg_val = ReadCoreReg(Rn, &success); |
| 2629 | if (!success) |
| 2630 | return false; |
| 2631 | |
Johnny Chen | 078fbc6 | 2011-02-22 19:48:22 +0000 | [diff] [blame] | 2632 | AddWithCarryResult res = AddWithCarry(reg_val, imm32, 0); |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2633 | |
| 2634 | EmulateInstruction::Context context; |
| 2635 | context.type = EmulateInstruction::eContextImmediate; |
| 2636 | context.SetNoArgs (); |
| 2637 | if (!WriteFlags(context, res.result, res.carry_out, res.overflow)) |
| 2638 | return false; |
| 2639 | |
| 2640 | return true; |
| 2641 | } |
| 2642 | |
| 2643 | // Compare Negative (register) adds a register value and an optionally-shifted register value. |
| 2644 | // It updates the condition flags based on the result, and discards the result. |
| 2645 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2646 | EmulateInstructionARM::EmulateCMNReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2647 | { |
| 2648 | #if 0 |
| 2649 | // ARM pseudo code... |
| 2650 | if ConditionPassed() then |
| 2651 | EncodingSpecificOperations(); |
| 2652 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 2653 | (result, carry, overflow) = AddWithCarry(R[n], shifted, '0'); |
| 2654 | APSR.N = result<31>; |
| 2655 | APSR.Z = IsZeroBit(result); |
| 2656 | APSR.C = carry; |
| 2657 | APSR.V = overflow; |
| 2658 | #endif |
| 2659 | |
| 2660 | bool success = false; |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2661 | |
| 2662 | uint32_t Rn; // the first operand |
| 2663 | uint32_t Rm; // the second operand |
| 2664 | ARM_ShifterType shift_t; |
| 2665 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 2666 | switch (encoding) { |
| 2667 | case eEncodingT1: |
| 2668 | Rn = Bits32(opcode, 2, 0); |
| 2669 | Rm = Bits32(opcode, 5, 3); |
| 2670 | shift_t = SRType_LSL; |
| 2671 | shift_n = 0; |
| 2672 | break; |
| 2673 | case eEncodingT2: |
Johnny Chen | 078fbc6 | 2011-02-22 19:48:22 +0000 | [diff] [blame] | 2674 | Rn = Bits32(opcode, 19, 16); |
| 2675 | Rm = Bits32(opcode, 3, 0); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 2676 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
Johnny Chen | 078fbc6 | 2011-02-22 19:48:22 +0000 | [diff] [blame] | 2677 | // if n == 15 || BadReg(m) then UNPREDICTABLE; |
| 2678 | if (Rn == 15 || BadReg(Rm)) |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2679 | return false; |
| 2680 | break; |
| 2681 | case eEncodingA1: |
| 2682 | Rn = Bits32(opcode, 19, 16); |
| 2683 | Rm = Bits32(opcode, 3, 0); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 2684 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 2685 | break; |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2686 | default: |
| 2687 | return false; |
| 2688 | } |
| 2689 | // Read the register value from register Rn. |
| 2690 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 2691 | if (!success) |
| 2692 | return false; |
| 2693 | |
| 2694 | // Read the register value from register Rm. |
| 2695 | uint32_t val2 = ReadCoreReg(Rm, &success); |
| 2696 | if (!success) |
| 2697 | return false; |
| 2698 | |
| 2699 | uint32_t shifted = Shift(val2, shift_t, shift_n, APSR_C); |
Johnny Chen | 078fbc6 | 2011-02-22 19:48:22 +0000 | [diff] [blame] | 2700 | AddWithCarryResult res = AddWithCarry(val1, shifted, 0); |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2701 | |
| 2702 | EmulateInstruction::Context context; |
| 2703 | context.type = EmulateInstruction::eContextImmediate; |
| 2704 | context.SetNoArgs(); |
| 2705 | if (!WriteFlags(context, res.result, res.carry_out, res.overflow)) |
| 2706 | return false; |
| 2707 | |
| 2708 | return true; |
| 2709 | } |
| 2710 | |
| 2711 | // Compare (immediate) subtracts an immediate value from a register value. |
| 2712 | // It updates the condition flags based on the result, and discards the result. |
| 2713 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2714 | EmulateInstructionARM::EmulateCMPImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | d4dc444 | 2011-02-11 02:02:56 +0000 | [diff] [blame] | 2715 | { |
| 2716 | #if 0 |
| 2717 | // ARM pseudo code... |
| 2718 | if ConditionPassed() then |
| 2719 | EncodingSpecificOperations(); |
| 2720 | (result, carry, overflow) = AddWithCarry(R[n], NOT(imm32), '1'); |
| 2721 | APSR.N = result<31>; |
| 2722 | APSR.Z = IsZeroBit(result); |
| 2723 | APSR.C = carry; |
| 2724 | APSR.V = overflow; |
| 2725 | #endif |
| 2726 | |
| 2727 | bool success = false; |
Johnny Chen | d4dc444 | 2011-02-11 02:02:56 +0000 | [diff] [blame] | 2728 | |
| 2729 | uint32_t Rn; // the first operand |
| 2730 | uint32_t imm32; // the immediate value to be compared with |
| 2731 | switch (encoding) { |
| 2732 | case eEncodingT1: |
| 2733 | Rn = Bits32(opcode, 10, 8); |
| 2734 | imm32 = Bits32(opcode, 7, 0); |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 2735 | break; |
Johnny Chen | 078fbc6 | 2011-02-22 19:48:22 +0000 | [diff] [blame] | 2736 | case eEncodingT2: |
| 2737 | Rn = Bits32(opcode, 19, 16); |
| 2738 | imm32 = ThumbExpandImm(opcode); // imm32 = ThumbExpandImm(i:imm3:imm8) |
| 2739 | if (Rn == 15) |
| 2740 | return false; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 2741 | break; |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2742 | case eEncodingA1: |
| 2743 | Rn = Bits32(opcode, 19, 16); |
| 2744 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
Johnny Chen | d4dc444 | 2011-02-11 02:02:56 +0000 | [diff] [blame] | 2745 | break; |
| 2746 | default: |
| 2747 | return false; |
| 2748 | } |
| 2749 | // Read the register value from the operand register Rn. |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 2750 | uint32_t reg_val = ReadCoreReg(Rn, &success); |
Johnny Chen | d4dc444 | 2011-02-11 02:02:56 +0000 | [diff] [blame] | 2751 | if (!success) |
| 2752 | return false; |
| 2753 | |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 2754 | AddWithCarryResult res = AddWithCarry(reg_val, ~imm32, 1); |
| 2755 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2756 | EmulateInstruction::Context context; |
| 2757 | context.type = EmulateInstruction::eContextImmediate; |
| 2758 | context.SetNoArgs (); |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 2759 | if (!WriteFlags(context, res.result, res.carry_out, res.overflow)) |
| 2760 | return false; |
| 2761 | |
Johnny Chen | d4dc444 | 2011-02-11 02:02:56 +0000 | [diff] [blame] | 2762 | return true; |
| 2763 | } |
| 2764 | |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2765 | // Compare (register) subtracts an optionally-shifted register value from a register value. |
| 2766 | // 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] | 2767 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2768 | EmulateInstructionARM::EmulateCMPReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2769 | { |
| 2770 | #if 0 |
| 2771 | // ARM pseudo code... |
| 2772 | if ConditionPassed() then |
| 2773 | EncodingSpecificOperations(); |
| 2774 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 2775 | (result, carry, overflow) = AddWithCarry(R[n], NOT(shifted), '1'); |
| 2776 | APSR.N = result<31>; |
| 2777 | APSR.Z = IsZeroBit(result); |
| 2778 | APSR.C = carry; |
| 2779 | APSR.V = overflow; |
| 2780 | #endif |
| 2781 | |
| 2782 | bool success = false; |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2783 | |
| 2784 | uint32_t Rn; // the first operand |
| 2785 | uint32_t Rm; // the second operand |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2786 | ARM_ShifterType shift_t; |
| 2787 | 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] | 2788 | switch (encoding) { |
| 2789 | case eEncodingT1: |
| 2790 | Rn = Bits32(opcode, 2, 0); |
| 2791 | Rm = Bits32(opcode, 5, 3); |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2792 | shift_t = SRType_LSL; |
| 2793 | shift_n = 0; |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2794 | break; |
| 2795 | case eEncodingT2: |
| 2796 | Rn = Bit32(opcode, 7) << 3 | Bits32(opcode, 2, 0); |
| 2797 | Rm = Bits32(opcode, 6, 3); |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2798 | shift_t = SRType_LSL; |
| 2799 | shift_n = 0; |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2800 | if (Rn < 8 && Rm < 8) |
| 2801 | return false; |
| 2802 | if (Rn == 15 || Rm == 15) |
| 2803 | return false; |
| 2804 | break; |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2805 | case eEncodingA1: |
| 2806 | Rn = Bits32(opcode, 19, 16); |
| 2807 | Rm = Bits32(opcode, 3, 0); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 2808 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 2809 | break; |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2810 | default: |
| 2811 | return false; |
| 2812 | } |
| 2813 | // Read the register value from register Rn. |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2814 | uint32_t val1 = ReadCoreReg(Rn, &success); |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2815 | if (!success) |
| 2816 | return false; |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2817 | |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2818 | // Read the register value from register Rm. |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2819 | uint32_t val2 = ReadCoreReg(Rm, &success); |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2820 | if (!success) |
| 2821 | return false; |
| 2822 | |
Johnny Chen | 34075cb | 2011-02-22 01:56:31 +0000 | [diff] [blame] | 2823 | uint32_t shifted = Shift(val2, shift_t, shift_n, APSR_C); |
| 2824 | AddWithCarryResult res = AddWithCarry(val1, ~shifted, 1); |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 2825 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 2826 | EmulateInstruction::Context context; |
| 2827 | context.type = EmulateInstruction::eContextImmediate; |
| 2828 | context.SetNoArgs(); |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 2829 | if (!WriteFlags(context, res.result, res.carry_out, res.overflow)) |
| 2830 | return false; |
| 2831 | |
Johnny Chen | e4a4d30 | 2011-02-11 21:53:58 +0000 | [diff] [blame] | 2832 | return true; |
| 2833 | } |
| 2834 | |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 2835 | // Arithmetic Shift Right (immediate) shifts a register value right by an immediate number of bits, |
| 2836 | // shifting in copies of its sign bit, and writes the result to the destination register. It can |
| 2837 | // optionally update the condition flags based on the result. |
| 2838 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2839 | EmulateInstructionARM::EmulateASRImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 2840 | { |
| 2841 | #if 0 |
| 2842 | // ARM pseudo code... |
| 2843 | if ConditionPassed() then |
| 2844 | EncodingSpecificOperations(); |
| 2845 | (result, carry) = Shift_C(R[m], SRType_ASR, shift_n, APSR.C); |
| 2846 | if d == 15 then // Can only occur for ARM encoding |
| 2847 | ALUWritePC(result); // setflags is always FALSE here |
| 2848 | else |
| 2849 | R[d] = result; |
| 2850 | if setflags then |
| 2851 | APSR.N = result<31>; |
| 2852 | APSR.Z = IsZeroBit(result); |
| 2853 | APSR.C = carry; |
| 2854 | // APSR.V unchanged |
| 2855 | #endif |
| 2856 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2857 | return EmulateShiftImm (opcode, encoding, SRType_ASR); |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 2858 | } |
| 2859 | |
| 2860 | // Arithmetic Shift Right (register) shifts a register value right by a variable number of bits, |
| 2861 | // shifting in copies of its sign bit, and writes the result to the destination register. |
| 2862 | // The variable number of bits is read from the bottom byte of a register. It can optionally update |
| 2863 | // the condition flags based on the result. |
| 2864 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2865 | EmulateInstructionARM::EmulateASRReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 2866 | { |
| 2867 | #if 0 |
| 2868 | // ARM pseudo code... |
| 2869 | if ConditionPassed() then |
| 2870 | EncodingSpecificOperations(); |
| 2871 | shift_n = UInt(R[m]<7:0>); |
| 2872 | (result, carry) = Shift_C(R[m], SRType_ASR, shift_n, APSR.C); |
| 2873 | R[d] = result; |
| 2874 | if setflags then |
| 2875 | APSR.N = result<31>; |
| 2876 | APSR.Z = IsZeroBit(result); |
| 2877 | APSR.C = carry; |
| 2878 | // APSR.V unchanged |
| 2879 | #endif |
| 2880 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2881 | return EmulateShiftReg (opcode, encoding, SRType_ASR); |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 2882 | } |
| 2883 | |
| 2884 | // Logical Shift Left (immediate) shifts a register value left by an immediate number of bits, |
| 2885 | // shifting in zeros, and writes the result to the destination register. It can optionally |
| 2886 | // update the condition flags based on the result. |
| 2887 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2888 | EmulateInstructionARM::EmulateLSLImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 2889 | { |
| 2890 | #if 0 |
| 2891 | // ARM pseudo code... |
| 2892 | if ConditionPassed() then |
| 2893 | EncodingSpecificOperations(); |
| 2894 | (result, carry) = Shift_C(R[m], SRType_LSL, shift_n, APSR.C); |
| 2895 | if d == 15 then // Can only occur for ARM encoding |
| 2896 | ALUWritePC(result); // setflags is always FALSE here |
| 2897 | else |
| 2898 | R[d] = result; |
| 2899 | if setflags then |
| 2900 | APSR.N = result<31>; |
| 2901 | APSR.Z = IsZeroBit(result); |
| 2902 | APSR.C = carry; |
| 2903 | // APSR.V unchanged |
| 2904 | #endif |
| 2905 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2906 | return EmulateShiftImm (opcode, encoding, SRType_LSL); |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 2907 | } |
| 2908 | |
| 2909 | // Logical Shift Left (register) shifts a register value left by a variable number of bits, |
| 2910 | // shifting in zeros, and writes the result to the destination register. The variable number |
| 2911 | // of bits is read from the bottom byte of a register. It can optionally update the condition |
| 2912 | // flags based on the result. |
| 2913 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2914 | EmulateInstructionARM::EmulateLSLReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 2915 | { |
| 2916 | #if 0 |
| 2917 | // ARM pseudo code... |
| 2918 | if ConditionPassed() then |
| 2919 | EncodingSpecificOperations(); |
| 2920 | shift_n = UInt(R[m]<7:0>); |
| 2921 | (result, carry) = Shift_C(R[m], SRType_LSL, shift_n, APSR.C); |
| 2922 | R[d] = result; |
| 2923 | if setflags then |
| 2924 | APSR.N = result<31>; |
| 2925 | APSR.Z = IsZeroBit(result); |
| 2926 | APSR.C = carry; |
| 2927 | // APSR.V unchanged |
| 2928 | #endif |
| 2929 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2930 | return EmulateShiftReg (opcode, encoding, SRType_LSL); |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 2931 | } |
| 2932 | |
| 2933 | // Logical Shift Right (immediate) shifts a register value right by an immediate number of bits, |
| 2934 | // shifting in zeros, and writes the result to the destination register. It can optionally |
| 2935 | // update the condition flags based on the result. |
| 2936 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2937 | EmulateInstructionARM::EmulateLSRImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 2938 | { |
| 2939 | #if 0 |
| 2940 | // ARM pseudo code... |
| 2941 | if ConditionPassed() then |
| 2942 | EncodingSpecificOperations(); |
| 2943 | (result, carry) = Shift_C(R[m], SRType_LSR, shift_n, APSR.C); |
| 2944 | if d == 15 then // Can only occur for ARM encoding |
| 2945 | ALUWritePC(result); // setflags is always FALSE here |
| 2946 | else |
| 2947 | R[d] = result; |
| 2948 | if setflags then |
| 2949 | APSR.N = result<31>; |
| 2950 | APSR.Z = IsZeroBit(result); |
| 2951 | APSR.C = carry; |
| 2952 | // APSR.V unchanged |
| 2953 | #endif |
| 2954 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2955 | return EmulateShiftImm (opcode, encoding, SRType_LSR); |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 2956 | } |
| 2957 | |
| 2958 | // Logical Shift Right (register) shifts a register value right by a variable number of bits, |
| 2959 | // shifting in zeros, and writes the result to the destination register. The variable number |
| 2960 | // of bits is read from the bottom byte of a register. It can optionally update the condition |
| 2961 | // flags based on the result. |
| 2962 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2963 | EmulateInstructionARM::EmulateLSRReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 2964 | { |
| 2965 | #if 0 |
| 2966 | // ARM pseudo code... |
| 2967 | if ConditionPassed() then |
| 2968 | EncodingSpecificOperations(); |
| 2969 | shift_n = UInt(R[m]<7:0>); |
| 2970 | (result, carry) = Shift_C(R[m], SRType_LSR, shift_n, APSR.C); |
| 2971 | R[d] = result; |
| 2972 | if setflags then |
| 2973 | APSR.N = result<31>; |
| 2974 | APSR.Z = IsZeroBit(result); |
| 2975 | APSR.C = carry; |
| 2976 | // APSR.V unchanged |
| 2977 | #endif |
| 2978 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2979 | return EmulateShiftReg (opcode, encoding, SRType_LSR); |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 2980 | } |
| 2981 | |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 2982 | // Rotate Right (immediate) provides the value of the contents of a register rotated by a constant value. |
| 2983 | // The bits that are rotated off the right end are inserted into the vacated bit positions on the left. |
| 2984 | // It can optionally update the condition flags based on the result. |
| 2985 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 2986 | EmulateInstructionARM::EmulateRORImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 2987 | { |
| 2988 | #if 0 |
| 2989 | // ARM pseudo code... |
| 2990 | if ConditionPassed() then |
| 2991 | EncodingSpecificOperations(); |
| 2992 | (result, carry) = Shift_C(R[m], SRType_ROR, shift_n, APSR.C); |
| 2993 | if d == 15 then // Can only occur for ARM encoding |
| 2994 | ALUWritePC(result); // setflags is always FALSE here |
| 2995 | else |
| 2996 | R[d] = result; |
| 2997 | if setflags then |
| 2998 | APSR.N = result<31>; |
| 2999 | APSR.Z = IsZeroBit(result); |
| 3000 | APSR.C = carry; |
| 3001 | // APSR.V unchanged |
| 3002 | #endif |
| 3003 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3004 | return EmulateShiftImm (opcode, encoding, SRType_ROR); |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3005 | } |
| 3006 | |
| 3007 | // Rotate Right (register) provides the value of the contents of a register rotated by a variable number of bits. |
| 3008 | // The bits that are rotated off the right end are inserted into the vacated bit positions on the left. |
| 3009 | // The variable number of bits is read from the bottom byte of a register. It can optionally update the condition |
| 3010 | // flags based on the result. |
| 3011 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3012 | EmulateInstructionARM::EmulateRORReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3013 | { |
| 3014 | #if 0 |
| 3015 | // ARM pseudo code... |
| 3016 | if ConditionPassed() then |
| 3017 | EncodingSpecificOperations(); |
| 3018 | shift_n = UInt(R[m]<7:0>); |
| 3019 | (result, carry) = Shift_C(R[m], SRType_ROR, shift_n, APSR.C); |
| 3020 | R[d] = result; |
| 3021 | if setflags then |
| 3022 | APSR.N = result<31>; |
| 3023 | APSR.Z = IsZeroBit(result); |
| 3024 | APSR.C = carry; |
| 3025 | // APSR.V unchanged |
| 3026 | #endif |
| 3027 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3028 | return EmulateShiftReg (opcode, encoding, SRType_ROR); |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3029 | } |
| 3030 | |
| 3031 | // Rotate Right with Extend provides the value of the contents of a register shifted right by one place, |
| 3032 | // with the carry flag shifted into bit [31]. |
| 3033 | // |
| 3034 | // RRX can optionally update the condition flags based on the result. |
| 3035 | // In that case, bit [0] is shifted into the carry flag. |
| 3036 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3037 | EmulateInstructionARM::EmulateRRX (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3038 | { |
| 3039 | #if 0 |
| 3040 | // ARM pseudo code... |
| 3041 | if ConditionPassed() then |
| 3042 | EncodingSpecificOperations(); |
| 3043 | (result, carry) = Shift_C(R[m], SRType_RRX, 1, APSR.C); |
| 3044 | if d == 15 then // Can only occur for ARM encoding |
| 3045 | ALUWritePC(result); // setflags is always FALSE here |
| 3046 | else |
| 3047 | R[d] = result; |
| 3048 | if setflags then |
| 3049 | APSR.N = result<31>; |
| 3050 | APSR.Z = IsZeroBit(result); |
| 3051 | APSR.C = carry; |
| 3052 | // APSR.V unchanged |
| 3053 | #endif |
| 3054 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3055 | return EmulateShiftImm (opcode, encoding, SRType_RRX); |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3056 | } |
| 3057 | |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 3058 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3059 | 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] | 3060 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3061 | assert(shift_type == SRType_ASR |
| 3062 | || shift_type == SRType_LSL |
| 3063 | || shift_type == SRType_LSR |
| 3064 | || shift_type == SRType_ROR |
| 3065 | || shift_type == SRType_RRX); |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 3066 | |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3067 | bool success = false; |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3068 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3069 | if (ConditionPassed(opcode)) |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3070 | { |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3071 | uint32_t Rd; // the destination register |
| 3072 | uint32_t Rm; // the first operand register |
| 3073 | uint32_t imm5; // encoding for the shift amount |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3074 | uint32_t carry; // the carry bit after the shift operation |
| 3075 | bool setflags; |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3076 | |
| 3077 | // Special case handling! |
| 3078 | // A8.6.139 ROR (immediate) -- Encoding T1 |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3079 | ARMEncoding use_encoding = encoding; |
| 3080 | if (shift_type == SRType_ROR && use_encoding == eEncodingT1) |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3081 | { |
| 3082 | // Morph the T1 encoding from the ARM Architecture Manual into T2 encoding to |
| 3083 | // 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] | 3084 | use_encoding = eEncodingT2; |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3085 | } |
| 3086 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3087 | switch (use_encoding) { |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3088 | case eEncodingT1: |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3089 | // Due to the above special case handling! |
| 3090 | assert(shift_type != SRType_ROR); |
| 3091 | |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3092 | Rd = Bits32(opcode, 2, 0); |
| 3093 | Rm = Bits32(opcode, 5, 3); |
| 3094 | setflags = !InITBlock(); |
| 3095 | imm5 = Bits32(opcode, 10, 6); |
| 3096 | break; |
| 3097 | case eEncodingT2: |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3098 | // A8.6.141 RRX |
| 3099 | assert(shift_type != SRType_RRX); |
| 3100 | |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3101 | Rd = Bits32(opcode, 11, 8); |
| 3102 | Rm = Bits32(opcode, 3, 0); |
| 3103 | setflags = BitIsSet(opcode, 20); |
| 3104 | imm5 = Bits32(opcode, 14, 12) << 2 | Bits32(opcode, 7, 6); |
| 3105 | if (BadReg(Rd) || BadReg(Rm)) |
| 3106 | return false; |
| 3107 | break; |
| 3108 | case eEncodingA1: |
| 3109 | Rd = Bits32(opcode, 15, 12); |
| 3110 | Rm = Bits32(opcode, 3, 0); |
| 3111 | setflags = BitIsSet(opcode, 20); |
| 3112 | imm5 = Bits32(opcode, 11, 7); |
| 3113 | break; |
| 3114 | default: |
| 3115 | return false; |
| 3116 | } |
| 3117 | |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3118 | // A8.6.139 ROR (immediate) |
| 3119 | if (shift_type == SRType_ROR && imm5 == 0) |
| 3120 | shift_type = SRType_RRX; |
| 3121 | |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3122 | // Get the first operand. |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 3123 | uint32_t value = ReadCoreReg (Rm, &success); |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3124 | if (!success) |
| 3125 | return false; |
| 3126 | |
Johnny Chen | eeab485 | 2011-02-16 22:14:44 +0000 | [diff] [blame] | 3127 | // Decode the shift amount if not RRX. |
| 3128 | uint32_t amt = (shift_type == SRType_RRX ? 1 : DecodeImmShift(shift_type, imm5)); |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3129 | |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 3130 | uint32_t result = Shift_C(value, shift_type, amt, APSR_C, carry); |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3131 | |
| 3132 | // The context specifies that an immediate is to be moved into Rd. |
| 3133 | EmulateInstruction::Context context; |
| 3134 | context.type = EmulateInstruction::eContextImmediate; |
| 3135 | context.SetNoArgs (); |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3136 | |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 3137 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 3138 | return false; |
Johnny Chen | 82f16aa | 2011-02-15 20:10:55 +0000 | [diff] [blame] | 3139 | } |
| 3140 | return true; |
| 3141 | } |
| 3142 | |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3143 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3144 | 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] | 3145 | { |
Johnny Chen | 41a0a15 | 2011-02-16 01:27:54 +0000 | [diff] [blame] | 3146 | assert(shift_type == SRType_ASR || shift_type == SRType_LSL || shift_type == SRType_LSR); |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3147 | |
| 3148 | bool success = false; |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3149 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3150 | if (ConditionPassed(opcode)) |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3151 | { |
| 3152 | uint32_t Rd; // the destination register |
| 3153 | uint32_t Rn; // the first operand register |
| 3154 | uint32_t Rm; // the register whose bottom byte contains the amount to shift by |
| 3155 | uint32_t carry; // the carry bit after the shift operation |
| 3156 | bool setflags; |
| 3157 | switch (encoding) { |
| 3158 | case eEncodingT1: |
| 3159 | Rd = Bits32(opcode, 2, 0); |
| 3160 | Rn = Rd; |
| 3161 | Rm = Bits32(opcode, 5, 3); |
| 3162 | setflags = !InITBlock(); |
| 3163 | break; |
| 3164 | case eEncodingT2: |
| 3165 | Rd = Bits32(opcode, 11, 8); |
| 3166 | Rn = Bits32(opcode, 19, 16); |
| 3167 | Rm = Bits32(opcode, 3, 0); |
| 3168 | setflags = BitIsSet(opcode, 20); |
| 3169 | if (BadReg(Rd) || BadReg(Rn) || BadReg(Rm)) |
| 3170 | return false; |
| 3171 | break; |
| 3172 | case eEncodingA1: |
| 3173 | Rd = Bits32(opcode, 15, 12); |
| 3174 | Rn = Bits32(opcode, 3, 0); |
| 3175 | Rm = Bits32(opcode, 11, 8); |
| 3176 | setflags = BitIsSet(opcode, 20); |
| 3177 | if (Rd == 15 || Rn == 15 || Rm == 15) |
| 3178 | return false; |
| 3179 | break; |
| 3180 | default: |
| 3181 | return false; |
| 3182 | } |
| 3183 | |
| 3184 | // Get the first operand. |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 3185 | uint32_t value = ReadCoreReg (Rn, &success); |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3186 | if (!success) |
| 3187 | return false; |
| 3188 | // Get the Rm register content. |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 3189 | uint32_t val = ReadCoreReg (Rm, &success); |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3190 | if (!success) |
| 3191 | return false; |
| 3192 | |
| 3193 | // Get the shift amount. |
| 3194 | uint32_t amt = Bits32(val, 7, 0); |
| 3195 | |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 3196 | uint32_t result = Shift_C(value, shift_type, amt, APSR_C, carry); |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3197 | |
| 3198 | // The context specifies that an immediate is to be moved into Rd. |
| 3199 | EmulateInstruction::Context context; |
| 3200 | context.type = EmulateInstruction::eContextImmediate; |
| 3201 | context.SetNoArgs (); |
| 3202 | |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 3203 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3204 | return false; |
Johnny Chen | e7f8953 | 2011-02-15 23:22:46 +0000 | [diff] [blame] | 3205 | } |
| 3206 | return true; |
| 3207 | } |
| 3208 | |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3209 | // LDM loads multiple registers from consecutive memory locations, using an |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3210 | // 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] | 3211 | // can be written back to the base register. |
| 3212 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3213 | EmulateInstructionARM::EmulateLDM (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3214 | { |
| 3215 | #if 0 |
| 3216 | // ARM pseudo code... |
| 3217 | if ConditionPassed() |
| 3218 | EncodingSpecificOperations(); NullCheckIfThumbEE (n); |
| 3219 | address = R[n]; |
| 3220 | |
| 3221 | for i = 0 to 14 |
| 3222 | if registers<i> == '1' then |
| 3223 | R[i] = MemA[address, 4]; address = address + 4; |
| 3224 | if registers<15> == '1' then |
| 3225 | LoadWritePC (MemA[address, 4]); |
| 3226 | |
| 3227 | if wback && registers<n> == '0' then R[n] = R[n] + 4 * BitCount (registers); |
| 3228 | if wback && registers<n> == '1' then R[n] = bits(32) UNKNOWN; // Only possible for encoding A1 |
| 3229 | |
| 3230 | #endif |
| 3231 | |
| 3232 | bool success = false; |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3233 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3234 | if (ConditionPassed(opcode)) |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3235 | { |
| 3236 | uint32_t n; |
| 3237 | uint32_t registers = 0; |
| 3238 | bool wback; |
| 3239 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 3240 | switch (encoding) |
| 3241 | { |
| 3242 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3243 | // n = UInt(Rn); registers = '00000000':register_list; wback = (registers<n> == '0'); |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3244 | n = Bits32 (opcode, 10, 8); |
| 3245 | registers = Bits32 (opcode, 7, 0); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 3246 | registers = registers & 0x00ff; // Make sure the top 8 bits are zeros. |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3247 | wback = BitIsClear (registers, n); |
| 3248 | // if BitCount(registers) < 1 then UNPREDICTABLE; |
| 3249 | if (BitCount(registers) < 1) |
| 3250 | return false; |
| 3251 | break; |
| 3252 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3253 | // if W == '1' && Rn == '1101' then SEE POP; |
| 3254 | // n = UInt(Rn); registers = P:M:'0':register_list; wback = (W == '1'); |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3255 | n = Bits32 (opcode, 19, 16); |
| 3256 | registers = Bits32 (opcode, 15, 0); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 3257 | registers = registers & 0xdfff; // Make sure bit 13 is zero. |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3258 | wback = BitIsSet (opcode, 21); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 3259 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3260 | // if n == 15 || BitCount(registers) < 2 || (P == '1' && M == '1') then UNPREDICTABLE; |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3261 | if ((n == 15) |
| 3262 | || (BitCount (registers) < 2) |
| 3263 | || (BitIsSet (opcode, 14) && BitIsSet (opcode, 15))) |
| 3264 | return false; |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 3265 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3266 | // if registers<15> == '1' && InITBlock() && !LastInITBlock() then UNPREDICTABLE; |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 3267 | if (BitIsSet (registers, 15) && InITBlock() && !LastInITBlock()) |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3268 | return false; |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 3269 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3270 | // if wback && registers<n> == '1' then UNPREDICTABLE; |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3271 | if (wback |
| 3272 | && BitIsSet (registers, n)) |
| 3273 | return false; |
| 3274 | break; |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 3275 | |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3276 | case eEncodingA1: |
| 3277 | n = Bits32 (opcode, 19, 16); |
| 3278 | registers = Bits32 (opcode, 15, 0); |
| 3279 | wback = BitIsSet (opcode, 21); |
| 3280 | if ((n == 15) |
| 3281 | || (BitCount (registers) < 1)) |
| 3282 | return false; |
| 3283 | break; |
| 3284 | default: |
| 3285 | return false; |
| 3286 | } |
| 3287 | |
| 3288 | int32_t offset = 0; |
| 3289 | const addr_t base_address = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 3290 | if (!success) |
| 3291 | return false; |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3292 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3293 | EmulateInstruction::Context context; |
| 3294 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
| 3295 | Register dwarf_reg; |
| 3296 | dwarf_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 3297 | context.SetRegisterPlusOffset (dwarf_reg, offset); |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3298 | |
| 3299 | for (int i = 0; i < 14; ++i) |
| 3300 | { |
| 3301 | if (BitIsSet (registers, i)) |
| 3302 | { |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3303 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3304 | context.SetRegisterPlusOffset (dwarf_reg, offset); |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3305 | if (wback && (n == 13)) // Pop Instruction |
| 3306 | context.type = EmulateInstruction::eContextPopRegisterOffStack; |
| 3307 | |
| 3308 | // R[i] = MemA [address, 4]; address = address + 4; |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3309 | 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] | 3310 | if (!success) |
| 3311 | return false; |
| 3312 | |
| 3313 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + i, data)) |
| 3314 | return false; |
| 3315 | |
| 3316 | offset += addr_byte_size; |
| 3317 | } |
| 3318 | } |
| 3319 | |
| 3320 | if (BitIsSet (registers, 15)) |
| 3321 | { |
| 3322 | //LoadWritePC (MemA [address, 4]); |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3323 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3324 | context.SetRegisterPlusOffset (dwarf_reg, offset); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3325 | 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] | 3326 | if (!success) |
| 3327 | return false; |
Johnny Chen | e62b50d | 2011-02-09 22:02:17 +0000 | [diff] [blame] | 3328 | // In ARMv5T and above, this is an interworking branch. |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 3329 | if (!LoadWritePC(context, data)) |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3330 | return false; |
| 3331 | } |
| 3332 | |
| 3333 | if (wback && BitIsClear (registers, n)) |
| 3334 | { |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3335 | // R[n] = R[n] + 4 * BitCount (registers) |
| 3336 | int32_t offset = addr_byte_size * BitCount (registers); |
| 3337 | context.type = EmulateInstruction::eContextAdjustBaseRegister; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3338 | context.SetRegisterPlusOffset (dwarf_reg, offset); |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3339 | |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3340 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, base_address + offset)) |
| 3341 | return false; |
| 3342 | } |
| 3343 | if (wback && BitIsSet (registers, n)) |
| 3344 | // R[n] bits(32) UNKNOWN; |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3345 | return WriteBits32Unknown (n); |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3346 | } |
| 3347 | return true; |
| 3348 | } |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3349 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3350 | // LDMDA loads multiple registers from consecutive memory locations using an address from a base register. |
| 3351 | // The consecutive memory locations end at this address and the address just below the lowest of those locations |
| 3352 | // can optionally be written back to the base register. |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3353 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3354 | EmulateInstructionARM::EmulateLDMDA (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3355 | { |
| 3356 | #if 0 |
| 3357 | // ARM pseudo code... |
| 3358 | if ConditionPassed() then |
| 3359 | EncodingSpecificOperations(); |
| 3360 | address = R[n] - 4*BitCount(registers) + 4; |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 3361 | |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3362 | for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3363 | if registers<i> == '1' then |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3364 | R[i] = MemA[address,4]; address = address + 4; |
| 3365 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3366 | if registers<15> == '1' then |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3367 | LoadWritePC(MemA[address,4]); |
| 3368 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3369 | if wback && registers<n> == '0' then R[n] = R[n] - 4*BitCount(registers); |
| 3370 | if wback && registers<n> == '1' then R[n] = bits(32) UNKNOWN; |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3371 | #endif |
| 3372 | |
| 3373 | bool success = false; |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3374 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3375 | if (ConditionPassed(opcode)) |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3376 | { |
| 3377 | uint32_t n; |
| 3378 | uint32_t registers = 0; |
| 3379 | bool wback; |
| 3380 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 3381 | |
| 3382 | // EncodingSpecificOperations(); |
| 3383 | switch (encoding) |
| 3384 | { |
| 3385 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3386 | // n = UInt(Rn); registers = register_list; wback = (W == '1'); |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3387 | n = Bits32 (opcode, 19, 16); |
| 3388 | registers = Bits32 (opcode, 15, 0); |
| 3389 | wback = BitIsSet (opcode, 21); |
| 3390 | |
| 3391 | // if n == 15 || BitCount(registers) < 1 then UNPREDICTABLE; |
| 3392 | if ((n == 15) || (BitCount (registers) < 1)) |
| 3393 | return false; |
| 3394 | |
| 3395 | break; |
| 3396 | |
| 3397 | default: |
| 3398 | return false; |
| 3399 | } |
| 3400 | // address = R[n] - 4*BitCount(registers) + 4; |
| 3401 | |
| 3402 | int32_t offset = 0; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3403 | addr_t Rn = ReadCoreReg (n, &success); |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3404 | |
| 3405 | if (!success) |
| 3406 | return false; |
| 3407 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3408 | addr_t address = Rn - (addr_byte_size * BitCount (registers)) + addr_byte_size; |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3409 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3410 | EmulateInstruction::Context context; |
| 3411 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
| 3412 | Register dwarf_reg; |
| 3413 | dwarf_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 3414 | context.SetRegisterPlusOffset (dwarf_reg, offset); |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3415 | |
| 3416 | // for i = 0 to 14 |
| 3417 | for (int i = 0; i < 14; ++i) |
| 3418 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3419 | // if registers<i> == '1' then |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3420 | if (BitIsSet (registers, i)) |
| 3421 | { |
| 3422 | // R[i] = MemA[address,4]; address = address + 4; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3423 | context.SetRegisterPlusOffset (dwarf_reg, Rn - (address + offset)); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3424 | uint32_t data = MemARead (context, address + offset, addr_byte_size, 0, &success); |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3425 | if (!success) |
| 3426 | return false; |
| 3427 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + i, data)) |
| 3428 | return false; |
| 3429 | offset += addr_byte_size; |
| 3430 | } |
| 3431 | } |
| 3432 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3433 | // if registers<15> == '1' then |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3434 | // LoadWritePC(MemA[address,4]); |
| 3435 | if (BitIsSet (registers, 15)) |
| 3436 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3437 | context.SetRegisterPlusOffset (dwarf_reg, offset); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3438 | uint32_t data = MemARead (context, address + offset, addr_byte_size, 0, &success); |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3439 | if (!success) |
| 3440 | return false; |
Johnny Chen | 44c10f0 | 2011-02-11 19:37:03 +0000 | [diff] [blame] | 3441 | // In ARMv5T and above, this is an interworking branch. |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 3442 | if (!LoadWritePC(context, data)) |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3443 | return false; |
| 3444 | } |
| 3445 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3446 | // 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] | 3447 | if (wback && BitIsClear (registers, n)) |
| 3448 | { |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3449 | if (!success) |
| 3450 | return false; |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3451 | |
| 3452 | offset = (addr_byte_size * BitCount (registers)) * -1; |
| 3453 | context.type = EmulateInstruction::eContextAdjustBaseRegister; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3454 | context.SetImmediateSigned (offset); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3455 | addr_t addr = Rn + offset; |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3456 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, addr)) |
| 3457 | return false; |
| 3458 | } |
| 3459 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3460 | // if wback && registers<n> == '1' then R[n] = bits(32) UNKNOWN; |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3461 | if (wback && BitIsSet (registers, n)) |
| 3462 | return WriteBits32Unknown (n); |
| 3463 | } |
| 3464 | return true; |
| 3465 | } |
| 3466 | |
| 3467 | // LDMDB loads multiple registers from consecutive memory locations using an address from a base register. The |
| 3468 | // consecutive memory lcoations end just below this address, and the address of the lowest of those locations can |
| 3469 | // be optionally written back to the base register. |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3470 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3471 | EmulateInstructionARM::EmulateLDMDB (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3472 | { |
| 3473 | #if 0 |
| 3474 | // ARM pseudo code... |
| 3475 | if ConditionPassed() then |
| 3476 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 3477 | address = R[n] - 4*BitCount(registers); |
| 3478 | |
| 3479 | for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3480 | if registers<i> == '1' then |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3481 | R[i] = MemA[address,4]; address = address + 4; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3482 | if registers<15> == '1' then |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3483 | LoadWritePC(MemA[address,4]); |
| 3484 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3485 | if wback && registers<n> == '0' then R[n] = R[n] - 4*BitCount(registers); |
| 3486 | 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] | 3487 | #endif |
| 3488 | |
| 3489 | bool success = false; |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3490 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3491 | if (ConditionPassed(opcode)) |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3492 | { |
| 3493 | uint32_t n; |
| 3494 | uint32_t registers = 0; |
| 3495 | bool wback; |
| 3496 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 3497 | switch (encoding) |
| 3498 | { |
| 3499 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3500 | // n = UInt(Rn); registers = P:M:'0':register_list; wback = (W == '1'); |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3501 | n = Bits32 (opcode, 19, 16); |
| 3502 | registers = Bits32 (opcode, 15, 0); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 3503 | registers = registers & 0xdfff; // Make sure bit 13 is a zero. |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3504 | wback = BitIsSet (opcode, 21); |
| 3505 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3506 | // if n == 15 || BitCount(registers) < 2 || (P == '1' && M == '1') then UNPREDICTABLE; |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3507 | if ((n == 15) |
| 3508 | || (BitCount (registers) < 2) |
| 3509 | || (BitIsSet (opcode, 14) && BitIsSet (opcode, 15))) |
| 3510 | return false; |
| 3511 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3512 | // if registers<15> == '1' && InITBlock() && !LastInITBlock() then UNPREDICTABLE; |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 3513 | if (BitIsSet (registers, 15) && InITBlock() && !LastInITBlock()) |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3514 | return false; |
| 3515 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3516 | // if wback && registers<n> == '1' then UNPREDICTABLE; |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3517 | if (wback && BitIsSet (registers, n)) |
| 3518 | return false; |
| 3519 | |
| 3520 | break; |
| 3521 | |
| 3522 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3523 | // n = UInt(Rn); registers = register_list; wback = (W == '1'); |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3524 | n = Bits32 (opcode, 19, 16); |
| 3525 | registers = Bits32 (opcode, 15, 0); |
| 3526 | wback = BitIsSet (opcode, 21); |
| 3527 | |
| 3528 | // if n == 15 || BitCount(registers) < 1 then UNPREDICTABLE; |
| 3529 | if ((n == 15) || (BitCount (registers) < 1)) |
| 3530 | return false; |
| 3531 | |
| 3532 | break; |
| 3533 | |
| 3534 | default: |
| 3535 | return false; |
| 3536 | } |
| 3537 | |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3538 | // address = R[n] - 4*BitCount(registers); |
| 3539 | |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3540 | int32_t offset = 0; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3541 | addr_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3542 | |
| 3543 | if (!success) |
| 3544 | return false; |
| 3545 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3546 | addr_t address = Rn - (addr_byte_size * BitCount (registers)); |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3547 | EmulateInstruction::Context context; |
| 3548 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
| 3549 | Register dwarf_reg; |
| 3550 | dwarf_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3551 | context.SetRegisterPlusOffset (dwarf_reg, Rn - address); |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3552 | |
| 3553 | for (int i = 0; i < 14; ++i) |
| 3554 | { |
| 3555 | if (BitIsSet (registers, i)) |
| 3556 | { |
| 3557 | // R[i] = MemA[address,4]; address = address + 4; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3558 | context.SetRegisterPlusOffset (dwarf_reg, Rn - (address + offset)); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3559 | uint32_t data = MemARead (context, address + offset, addr_byte_size, 0, &success); |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3560 | if (!success) |
| 3561 | return false; |
| 3562 | |
| 3563 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + i, data)) |
| 3564 | return false; |
| 3565 | |
| 3566 | offset += addr_byte_size; |
| 3567 | } |
| 3568 | } |
| 3569 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3570 | // if registers<15> == '1' then |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3571 | // LoadWritePC(MemA[address,4]); |
| 3572 | if (BitIsSet (registers, 15)) |
| 3573 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3574 | context.SetRegisterPlusOffset (dwarf_reg, offset); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3575 | uint32_t data = MemARead (context, address + offset, addr_byte_size, 0, &success); |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3576 | if (!success) |
| 3577 | return false; |
Johnny Chen | e62b50d | 2011-02-09 22:02:17 +0000 | [diff] [blame] | 3578 | // In ARMv5T and above, this is an interworking branch. |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 3579 | if (!LoadWritePC(context, data)) |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3580 | return false; |
| 3581 | } |
| 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); |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3584 | if (wback && BitIsClear (registers, n)) |
| 3585 | { |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3586 | if (!success) |
| 3587 | return false; |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3588 | |
| 3589 | offset = (addr_byte_size * BitCount (registers)) * -1; |
| 3590 | context.type = EmulateInstruction::eContextAdjustBaseRegister; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3591 | context.SetImmediateSigned (offset); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3592 | addr_t addr = Rn + offset; |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3593 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, addr)) |
| 3594 | return false; |
| 3595 | } |
| 3596 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3597 | // 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] | 3598 | if (wback && BitIsSet (registers, n)) |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3599 | return WriteBits32Unknown (n); |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3600 | } |
| 3601 | return true; |
| 3602 | } |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3603 | |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3604 | // LDMIB loads multiple registers from consecutive memory locations using an address from a base register. The |
| 3605 | // consecutive memory locations start just above this address, and thea ddress of the last of those locations can |
| 3606 | // optinoally be written back to the base register. |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3607 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3608 | EmulateInstructionARM::EmulateLDMIB (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3609 | { |
| 3610 | #if 0 |
| 3611 | if ConditionPassed() then |
| 3612 | EncodingSpecificOperations(); |
| 3613 | address = R[n] + 4; |
| 3614 | |
| 3615 | for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3616 | if registers<i> == '1' then |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3617 | R[i] = MemA[address,4]; address = address + 4; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3618 | if registers<15> == '1' then |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3619 | LoadWritePC(MemA[address,4]); |
| 3620 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3621 | if wback && registers<n> == '0' then R[n] = R[n] + 4*BitCount(registers); |
| 3622 | if wback && registers<n> == '1' then R[n] = bits(32) UNKNOWN; |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3623 | #endif |
| 3624 | |
| 3625 | bool success = false; |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3626 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3627 | if (ConditionPassed(opcode)) |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3628 | { |
| 3629 | uint32_t n; |
| 3630 | uint32_t registers = 0; |
| 3631 | bool wback; |
| 3632 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 3633 | switch (encoding) |
| 3634 | { |
| 3635 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3636 | // n = UInt(Rn); registers = register_list; wback = (W == '1'); |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3637 | n = Bits32 (opcode, 19, 16); |
| 3638 | registers = Bits32 (opcode, 15, 0); |
| 3639 | wback = BitIsSet (opcode, 21); |
| 3640 | |
| 3641 | // if n == 15 || BitCount(registers) < 1 then UNPREDICTABLE; |
| 3642 | if ((n == 15) || (BitCount (registers) < 1)) |
| 3643 | return false; |
| 3644 | |
| 3645 | break; |
| 3646 | default: |
| 3647 | return false; |
| 3648 | } |
| 3649 | // address = R[n] + 4; |
| 3650 | |
| 3651 | int32_t offset = 0; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3652 | addr_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3653 | |
| 3654 | if (!success) |
| 3655 | return false; |
| 3656 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3657 | addr_t address = Rn + addr_byte_size; |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3658 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3659 | EmulateInstruction::Context context; |
| 3660 | context.type = EmulateInstruction::eContextRegisterPlusOffset; |
| 3661 | Register dwarf_reg; |
| 3662 | dwarf_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 3663 | context.SetRegisterPlusOffset (dwarf_reg, offset); |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3664 | |
| 3665 | for (int i = 0; i < 14; ++i) |
| 3666 | { |
| 3667 | if (BitIsSet (registers, i)) |
| 3668 | { |
| 3669 | // R[i] = MemA[address,4]; address = address + 4; |
| 3670 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3671 | context.SetRegisterPlusOffset (dwarf_reg, offset + addr_byte_size); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3672 | uint32_t data = MemARead (context, address + offset, addr_byte_size, 0, &success); |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3673 | if (!success) |
| 3674 | return false; |
| 3675 | |
| 3676 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + i, data)) |
| 3677 | return false; |
| 3678 | |
| 3679 | offset += addr_byte_size; |
| 3680 | } |
| 3681 | } |
| 3682 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3683 | // if registers<15> == '1' then |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3684 | // LoadWritePC(MemA[address,4]); |
| 3685 | if (BitIsSet (registers, 15)) |
| 3686 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3687 | context.SetRegisterPlusOffset (dwarf_reg, offset); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3688 | uint32_t data = MemARead (context, address + offset, addr_byte_size, 0, &success); |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3689 | if (!success) |
| 3690 | return false; |
Johnny Chen | e62b50d | 2011-02-09 22:02:17 +0000 | [diff] [blame] | 3691 | // In ARMv5T and above, this is an interworking branch. |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 3692 | if (!LoadWritePC(context, data)) |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3693 | return false; |
| 3694 | } |
| 3695 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3696 | // 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] | 3697 | if (wback && BitIsClear (registers, n)) |
| 3698 | { |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3699 | if (!success) |
| 3700 | return false; |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3701 | |
| 3702 | offset = addr_byte_size * BitCount (registers); |
| 3703 | context.type = EmulateInstruction::eContextAdjustBaseRegister; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3704 | context.SetImmediateSigned (offset); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3705 | addr_t addr = Rn + offset; |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3706 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, addr)) |
| 3707 | return false; |
| 3708 | } |
| 3709 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3710 | // 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] | 3711 | if (wback && BitIsSet (registers, n)) |
Caroline Tice | 713c266 | 2011-02-11 17:59:55 +0000 | [diff] [blame] | 3712 | return WriteBits32Unknown (n); |
Caroline Tice | 85aab33 | 2011-02-08 23:56:10 +0000 | [diff] [blame] | 3713 | } |
| 3714 | return true; |
| 3715 | } |
Caroline Tice | 0b29e24 | 2011-02-08 23:16:02 +0000 | [diff] [blame] | 3716 | |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3717 | // Load Register (immediate) calculates an address from a base register value and |
| 3718 | // an immediate offset, loads a word from memory, and writes to a register. |
| 3719 | // LDR (immediate, Thumb) |
| 3720 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3721 | EmulateInstructionARM::EmulateLDRRtRnImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3722 | { |
| 3723 | #if 0 |
| 3724 | // ARM pseudo code... |
| 3725 | if (ConditionPassed()) |
| 3726 | { |
| 3727 | EncodingSpecificOperations(); NullCheckIfThumbEE(15); |
| 3728 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 3729 | address = if index then offset_addr else R[n]; |
| 3730 | data = MemU[address,4]; |
| 3731 | if wback then R[n] = offset_addr; |
| 3732 | if t == 15 then |
| 3733 | if address<1:0> == '00' then LoadWritePC(data); else UNPREDICTABLE; |
| 3734 | elsif UnalignedSupport() || address<1:0> = '00' then |
| 3735 | R[t] = data; |
| 3736 | else R[t] = bits(32) UNKNOWN; // Can only apply before ARMv7 |
| 3737 | } |
| 3738 | #endif |
| 3739 | |
| 3740 | bool success = false; |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3741 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3742 | if (ConditionPassed(opcode)) |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3743 | { |
| 3744 | uint32_t Rt; // the destination register |
| 3745 | uint32_t Rn; // the base register |
| 3746 | uint32_t imm32; // the immediate offset used to form the address |
| 3747 | addr_t offset_addr; // the offset address |
| 3748 | addr_t address; // the calculated address |
| 3749 | uint32_t data; // the literal data value from memory load |
| 3750 | bool add, index, wback; |
| 3751 | switch (encoding) { |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3752 | case eEncodingT1: |
Caroline Tice | 55e569e | 2011-04-13 21:49:04 +0000 | [diff] [blame] | 3753 | Rt = Bits32(opcode, 2, 0); |
| 3754 | Rn = Bits32(opcode, 5, 3); |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3755 | imm32 = Bits32(opcode, 10, 6) << 2; // imm32 = ZeroExtend(imm5:'00', 32); |
| 3756 | // index = TRUE; add = TRUE; wback = FALSE |
| 3757 | add = true; |
| 3758 | index = true; |
| 3759 | wback = false; |
| 3760 | |
| 3761 | break; |
| 3762 | |
| 3763 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3764 | // t = UInt(Rt); n = 13; imm32 = ZeroExtend(imm8:'00', 32); |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3765 | Rt = Bits32 (opcode, 10, 8); |
| 3766 | Rn = 13; |
| 3767 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 3768 | |
| 3769 | // index = TRUE; add = TRUE; wback = FALSE; |
| 3770 | index = true; |
| 3771 | add = true; |
| 3772 | wback = false; |
| 3773 | |
| 3774 | break; |
| 3775 | |
| 3776 | case eEncodingT3: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3777 | // if Rn == '1111' then SEE LDR (literal); |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3778 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 3779 | Rt = Bits32 (opcode, 15, 12); |
| 3780 | Rn = Bits32 (opcode, 19, 16); |
| 3781 | imm32 = Bits32 (opcode, 11, 0); |
| 3782 | |
| 3783 | // index = TRUE; add = TRUE; wback = FALSE; |
| 3784 | index = true; |
| 3785 | add = true; |
| 3786 | wback = false; |
| 3787 | |
| 3788 | // if t == 15 && InITBlock() && !LastInITBlock() then UNPREDICTABLE; |
| 3789 | if ((Rt == 15) && InITBlock() && !LastInITBlock()) |
| 3790 | return false; |
| 3791 | |
| 3792 | break; |
| 3793 | |
| 3794 | case eEncodingT4: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3795 | // if Rn == '1111' then SEE LDR (literal); |
| 3796 | // if P == '1' && U == '1' && W == '0' then SEE LDRT; |
| 3797 | // if Rn == '1101' && P == '0' && U == '1' && W == '1' && imm8 == '00000100' then SEE POP; |
| 3798 | // if P == '0' && W == '0' then UNDEFINED; |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3799 | if (BitIsClear (opcode, 10) && BitIsClear (opcode, 8)) |
| 3800 | return false; |
| 3801 | |
| 3802 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm8, 32); |
| 3803 | Rt = Bits32 (opcode, 15, 12); |
| 3804 | Rn = Bits32 (opcode, 19, 16); |
| 3805 | imm32 = Bits32 (opcode, 7, 0); |
| 3806 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3807 | // index = (P == '1'); add = (U == '1'); wback = (W == '1'); |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3808 | index = BitIsSet (opcode, 10); |
| 3809 | add = BitIsSet (opcode, 9); |
| 3810 | wback = BitIsSet (opcode, 8); |
| 3811 | |
| 3812 | // if (wback && n == t) || (t == 15 && InITBlock() && !LastInITBlock()) then UNPREDICTABLE; |
| 3813 | if ((wback && (Rn == Rt)) || ((Rt == 15) && InITBlock() && !LastInITBlock())) |
| 3814 | return false; |
| 3815 | |
| 3816 | break; |
| 3817 | |
| 3818 | default: |
| 3819 | return false; |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3820 | } |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3821 | uint32_t base = ReadCoreReg (Rn, &success); |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3822 | if (!success) |
| 3823 | return false; |
| 3824 | if (add) |
| 3825 | offset_addr = base + imm32; |
| 3826 | else |
| 3827 | offset_addr = base - imm32; |
| 3828 | |
| 3829 | address = (index ? offset_addr : base); |
| 3830 | |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3831 | Register base_reg; |
| 3832 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + Rn); |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3833 | if (wback) |
| 3834 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3835 | EmulateInstruction::Context ctx; |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3836 | ctx.type = EmulateInstruction::eContextAdjustBaseRegister; |
| 3837 | ctx.SetRegisterPlusOffset (base_reg, (int32_t) (offset_addr - base)); |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3838 | |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3839 | if (!WriteRegisterUnsigned (ctx, eRegisterKindDWARF, dwarf_r0 + Rn, offset_addr)) |
| 3840 | return false; |
| 3841 | } |
| 3842 | |
| 3843 | // Prepare to write to the Rt register. |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3844 | EmulateInstruction::Context context; |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3845 | context.type = EmulateInstruction::eContextRegisterLoad; |
| 3846 | context.SetRegisterPlusOffset (base_reg, (int32_t) (offset_addr - base)); |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3847 | |
| 3848 | // Read memory from the address. |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3849 | data = MemURead(context, address, 4, 0, &success); |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3850 | if (!success) |
| 3851 | return false; |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3852 | |
| 3853 | if (Rt == 15) |
| 3854 | { |
| 3855 | if (Bits32(address, 1, 0) == 0) |
| 3856 | { |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 3857 | if (!LoadWritePC(context, data)) |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3858 | return false; |
| 3859 | } |
| 3860 | else |
| 3861 | return false; |
| 3862 | } |
| 3863 | else if (UnalignedSupport() || Bits32(address, 1, 0) == 0) |
| 3864 | { |
| 3865 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + Rt, data)) |
| 3866 | return false; |
| 3867 | } |
| 3868 | else |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 3869 | WriteBits32Unknown (Rt); |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 3870 | } |
| 3871 | return true; |
| 3872 | } |
| 3873 | |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 3874 | // STM (Store Multiple Increment After) stores multiple registers to consecutive memory locations using an address |
| 3875 | // from a base register. The consecutive memory locations start at this address, and teh address just above the last |
| 3876 | // of those locations can optionally be written back to the base register. |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3877 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3878 | EmulateInstructionARM::EmulateSTM (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3879 | { |
| 3880 | #if 0 |
| 3881 | if ConditionPassed() then |
| 3882 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 3883 | address = R[n]; |
| 3884 | |
| 3885 | for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3886 | if registers<i> == '1' then |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3887 | if i == n && wback && i != LowestSetBit(registers) then |
| 3888 | MemA[address,4] = bits(32) UNKNOWN; // Only possible for encodings T1 and A1 |
| 3889 | else |
| 3890 | MemA[address,4] = R[i]; |
| 3891 | address = address + 4; |
| 3892 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3893 | if registers<15> == '1' then // Only possible for encoding A1 |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3894 | MemA[address,4] = PCStoreValue(); |
| 3895 | if wback then R[n] = R[n] + 4*BitCount(registers); |
| 3896 | #endif |
| 3897 | |
| 3898 | bool success = false; |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3899 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 3900 | if (ConditionPassed(opcode)) |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3901 | { |
| 3902 | uint32_t n; |
| 3903 | uint32_t registers = 0; |
| 3904 | bool wback; |
| 3905 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 3906 | |
| 3907 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 3908 | switch (encoding) |
| 3909 | { |
| 3910 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3911 | // n = UInt(Rn); registers = '00000000':register_list; wback = TRUE; |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3912 | n = Bits32 (opcode, 10, 8); |
| 3913 | registers = Bits32 (opcode, 7, 0); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 3914 | registers = registers & 0x00ff; // Make sure the top 8 bits are zeros. |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3915 | wback = true; |
| 3916 | |
| 3917 | // if BitCount(registers) < 1 then UNPREDICTABLE; |
| 3918 | if (BitCount (registers) < 1) |
| 3919 | return false; |
| 3920 | |
| 3921 | break; |
| 3922 | |
| 3923 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3924 | // n = UInt(Rn); registers = '0':M:'0':register_list; wback = (W == '1'); |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3925 | n = Bits32 (opcode, 19, 16); |
| 3926 | registers = Bits32 (opcode, 15, 0); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 3927 | registers = registers & 0x5fff; // Make sure bits 15 & 13 are zeros. |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3928 | wback = BitIsSet (opcode, 21); |
| 3929 | |
| 3930 | // if n == 15 || BitCount(registers) < 2 then UNPREDICTABLE; |
| 3931 | if ((n == 15) || (BitCount (registers) < 2)) |
| 3932 | return false; |
| 3933 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3934 | // if wback && registers<n> == '1' then UNPREDICTABLE; |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3935 | if (wback && BitIsSet (registers, n)) |
| 3936 | return false; |
| 3937 | |
| 3938 | break; |
| 3939 | |
| 3940 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3941 | // n = UInt(Rn); registers = register_list; wback = (W == '1'); |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3942 | n = Bits32 (opcode, 19, 16); |
| 3943 | registers = Bits32 (opcode, 15, 0); |
| 3944 | wback = BitIsSet (opcode, 21); |
| 3945 | |
| 3946 | // if n == 15 || BitCount(registers) < 1 then UNPREDICTABLE; |
| 3947 | if ((n == 15) || (BitCount (registers) < 1)) |
| 3948 | return false; |
| 3949 | |
| 3950 | break; |
| 3951 | |
| 3952 | default: |
| 3953 | return false; |
| 3954 | } |
| 3955 | |
| 3956 | // address = R[n]; |
| 3957 | int32_t offset = 0; |
| 3958 | const addr_t address = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 3959 | if (!success) |
| 3960 | return false; |
| 3961 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3962 | EmulateInstruction::Context context; |
| 3963 | context.type = EmulateInstruction::eContextRegisterStore; |
| 3964 | Register base_reg; |
| 3965 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3966 | |
| 3967 | // for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3968 | int lowest_set_bit = 14; |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3969 | for (int i = 0; i < 14; ++i) |
| 3970 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3971 | // if registers<i> == '1' then |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3972 | if (BitIsSet (registers, i)) |
| 3973 | { |
| 3974 | if (i < lowest_set_bit) |
| 3975 | lowest_set_bit = i; |
| 3976 | // if i == n && wback && i != LowestSetBit(registers) then |
| 3977 | if ((i == n) && wback && (i != lowest_set_bit)) |
| 3978 | // MemA[address,4] = bits(32) UNKNOWN; // Only possible for encodings T1 and A1 |
| 3979 | WriteBits32UnknownToMemory (address + offset); |
| 3980 | else |
| 3981 | { |
| 3982 | // MemA[address,4] = R[i]; |
| 3983 | uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + i, 0, &success); |
| 3984 | if (!success) |
| 3985 | return false; |
| 3986 | |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 3987 | Register data_reg; |
| 3988 | data_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + i); |
| 3989 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, offset); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 3990 | if (!MemAWrite (context, address + offset, data, addr_byte_size)) |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 3991 | return false; |
| 3992 | } |
| 3993 | |
| 3994 | // address = address + 4; |
| 3995 | offset += addr_byte_size; |
| 3996 | } |
| 3997 | } |
| 3998 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 3999 | // if registers<15> == '1' then // Only possible for encoding A1 |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 4000 | // MemA[address,4] = PCStoreValue(); |
| 4001 | if (BitIsSet (registers, 15)) |
| 4002 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 4003 | Register pc_reg; |
| 4004 | pc_reg.SetRegister (eRegisterKindDWARF, dwarf_pc); |
| 4005 | context.SetRegisterPlusOffset (pc_reg, 8); |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 4006 | const uint32_t pc = ReadCoreReg (PC_REG, &success); |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 4007 | if (!success) |
| 4008 | return false; |
| 4009 | |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 4010 | if (!MemAWrite (context, address + offset, pc, addr_byte_size)) |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 4011 | return false; |
| 4012 | } |
| 4013 | |
| 4014 | // if wback then R[n] = R[n] + 4*BitCount(registers); |
| 4015 | if (wback) |
| 4016 | { |
| 4017 | offset = addr_byte_size * BitCount (registers); |
| 4018 | context.type = EmulateInstruction::eContextAdjustBaseRegister; |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 4019 | context.SetImmediateSigned (offset); |
Caroline Tice | fa17220 | 2011-02-11 22:49:54 +0000 | [diff] [blame] | 4020 | addr_t data = address + offset; |
| 4021 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, data)) |
| 4022 | return false; |
| 4023 | } |
| 4024 | } |
| 4025 | return true; |
| 4026 | } |
| 4027 | |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4028 | // STMDA (Store Multiple Decrement After) stores multiple registers to consecutive memory locations using an address |
| 4029 | // from a base register. The consecutive memory locations end at this address, and the address just below the lowest |
| 4030 | // of those locations can optionally be written back to the base register. |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4031 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4032 | EmulateInstructionARM::EmulateSTMDA (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4033 | { |
| 4034 | #if 0 |
| 4035 | if ConditionPassed() then |
| 4036 | EncodingSpecificOperations(); |
| 4037 | address = R[n] - 4*BitCount(registers) + 4; |
| 4038 | |
| 4039 | for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4040 | if registers<i> == '1' then |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4041 | if i == n && wback && i != LowestSetBit(registers) then |
| 4042 | MemA[address,4] = bits(32) UNKNOWN; |
| 4043 | else |
| 4044 | MemA[address,4] = R[i]; |
| 4045 | address = address + 4; |
| 4046 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4047 | if registers<15> == '1' then |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4048 | MemA[address,4] = PCStoreValue(); |
| 4049 | |
| 4050 | if wback then R[n] = R[n] - 4*BitCount(registers); |
| 4051 | #endif |
| 4052 | |
| 4053 | bool success = false; |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4054 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4055 | if (ConditionPassed(opcode)) |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4056 | { |
| 4057 | uint32_t n; |
| 4058 | uint32_t registers = 0; |
| 4059 | bool wback; |
| 4060 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 4061 | |
| 4062 | // EncodingSpecificOperations(); |
| 4063 | switch (encoding) |
| 4064 | { |
| 4065 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4066 | // n = UInt(Rn); registers = register_list; wback = (W == '1'); |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4067 | n = Bits32 (opcode, 19, 16); |
| 4068 | registers = Bits32 (opcode, 15, 0); |
| 4069 | wback = BitIsSet (opcode, 21); |
| 4070 | |
| 4071 | // if n == 15 || BitCount(registers) < 1 then UNPREDICTABLE; |
| 4072 | if ((n == 15) || (BitCount (registers) < 1)) |
| 4073 | return false; |
| 4074 | break; |
| 4075 | default: |
| 4076 | return false; |
| 4077 | } |
| 4078 | |
| 4079 | // address = R[n] - 4*BitCount(registers) + 4; |
| 4080 | int32_t offset = 0; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4081 | addr_t Rn = ReadCoreReg (n, &success); |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4082 | if (!success) |
| 4083 | return false; |
| 4084 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4085 | addr_t address = Rn - (addr_byte_size * BitCount (registers)) + 4; |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4086 | |
| 4087 | EmulateInstruction::Context context; |
| 4088 | context.type = EmulateInstruction::eContextRegisterStore; |
| 4089 | Register base_reg; |
| 4090 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 4091 | |
| 4092 | // for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4093 | int lowest_bit_set = 14; |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4094 | for (int i = 0; i < 14; ++i) |
| 4095 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4096 | // if registers<i> == '1' then |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4097 | if (BitIsSet (registers, i)) |
| 4098 | { |
| 4099 | if (i < lowest_bit_set) |
| 4100 | lowest_bit_set = i; |
| 4101 | //if i == n && wback && i != LowestSetBit(registers) then |
| 4102 | if ((i == n) && wback && (i != lowest_bit_set)) |
| 4103 | // MemA[address,4] = bits(32) UNKNOWN; |
| 4104 | WriteBits32UnknownToMemory (address + offset); |
| 4105 | else |
| 4106 | { |
| 4107 | // MemA[address,4] = R[i]; |
| 4108 | uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + i, 0, &success); |
| 4109 | if (!success) |
| 4110 | return false; |
| 4111 | |
| 4112 | Register data_reg; |
| 4113 | data_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + i); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4114 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, Rn - (address + offset)); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 4115 | if (!MemAWrite (context, address + offset, data, addr_byte_size)) |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4116 | return false; |
| 4117 | } |
| 4118 | |
| 4119 | // address = address + 4; |
| 4120 | offset += addr_byte_size; |
| 4121 | } |
| 4122 | } |
| 4123 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4124 | // if registers<15> == '1' then |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4125 | // MemA[address,4] = PCStoreValue(); |
| 4126 | if (BitIsSet (registers, 15)) |
| 4127 | { |
| 4128 | Register pc_reg; |
| 4129 | pc_reg.SetRegister (eRegisterKindDWARF, dwarf_pc); |
| 4130 | context.SetRegisterPlusOffset (pc_reg, 8); |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 4131 | const uint32_t pc = ReadCoreReg (PC_REG, &success); |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4132 | if (!success) |
| 4133 | return false; |
| 4134 | |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 4135 | if (!MemAWrite (context, address + offset, pc, addr_byte_size)) |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4136 | return false; |
| 4137 | } |
| 4138 | |
| 4139 | // if wback then R[n] = R[n] - 4*BitCount(registers); |
| 4140 | if (wback) |
| 4141 | { |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4142 | offset = (addr_byte_size * BitCount (registers)) * -1; |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4143 | context.type = EmulateInstruction::eContextAdjustBaseRegister; |
| 4144 | context.SetImmediateSigned (offset); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4145 | addr_t data = Rn + offset; |
Caroline Tice | 1511f50 | 2011-02-15 00:19:42 +0000 | [diff] [blame] | 4146 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, data)) |
| 4147 | return false; |
| 4148 | } |
| 4149 | } |
| 4150 | return true; |
| 4151 | } |
| 4152 | |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4153 | // STMDB (Store Multiple Decrement Before) stores multiple registers to consecutive memory locations using an address |
| 4154 | // from a base register. The consecutive memory locations end just below this address, and the address of the first of |
| 4155 | // those locations can optionally be written back to the base register. |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4156 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4157 | EmulateInstructionARM::EmulateSTMDB (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4158 | { |
| 4159 | #if 0 |
| 4160 | if ConditionPassed() then |
| 4161 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 4162 | address = R[n] - 4*BitCount(registers); |
| 4163 | |
| 4164 | for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4165 | if registers<i> == '1' then |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4166 | if i == n && wback && i != LowestSetBit(registers) then |
| 4167 | MemA[address,4] = bits(32) UNKNOWN; // Only possible for encoding A1 |
| 4168 | else |
| 4169 | MemA[address,4] = R[i]; |
| 4170 | address = address + 4; |
| 4171 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4172 | if registers<15> == '1' then // Only possible for encoding A1 |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4173 | MemA[address,4] = PCStoreValue(); |
| 4174 | |
| 4175 | if wback then R[n] = R[n] - 4*BitCount(registers); |
| 4176 | #endif |
| 4177 | |
| 4178 | |
| 4179 | bool success = false; |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4180 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4181 | if (ConditionPassed(opcode)) |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4182 | { |
| 4183 | uint32_t n; |
| 4184 | uint32_t registers = 0; |
| 4185 | bool wback; |
| 4186 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 4187 | |
| 4188 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 4189 | switch (encoding) |
| 4190 | { |
| 4191 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4192 | // if W == '1' && Rn == '1101' then SEE PUSH; |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4193 | if ((BitIsSet (opcode, 21)) && (Bits32 (opcode, 19, 16) == 13)) |
| 4194 | { |
| 4195 | // See PUSH |
| 4196 | } |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4197 | // n = UInt(Rn); registers = '0':M:'0':register_list; wback = (W == '1'); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4198 | n = Bits32 (opcode, 19, 16); |
| 4199 | registers = Bits32 (opcode, 15, 0); |
| 4200 | registers = registers & 0x5fff; // Make sure bits 15 & 13 are zeros. |
| 4201 | wback = BitIsSet (opcode, 21); |
| 4202 | // if n == 15 || BitCount(registers) < 2 then UNPREDICTABLE; |
| 4203 | if ((n == 15) || BitCount (registers) < 2) |
| 4204 | return false; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4205 | // if wback && registers<n> == '1' then UNPREDICTABLE; |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4206 | if (wback && BitIsSet (registers, n)) |
| 4207 | return false; |
| 4208 | break; |
| 4209 | |
| 4210 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4211 | // if W == '1' && Rn == '1101’ && BitCount(register_list) >= 2 then SEE PUSH; |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4212 | if (BitIsSet (opcode, 21) && (Bits32 (opcode, 19, 16) == 13) && BitCount (Bits32 (opcode, 15, 0)) >= 2) |
| 4213 | { |
| 4214 | // See Push |
| 4215 | } |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4216 | // n = UInt(Rn); registers = register_list; wback = (W == '1'); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4217 | n = Bits32 (opcode, 19, 16); |
| 4218 | registers = Bits32 (opcode, 15, 0); |
| 4219 | wback = BitIsSet (opcode, 21); |
| 4220 | // if n == 15 || BitCount(registers) < 1 then UNPREDICTABLE; |
| 4221 | if ((n == 15) || BitCount (registers) < 1) |
| 4222 | return false; |
| 4223 | break; |
| 4224 | |
| 4225 | default: |
| 4226 | return false; |
| 4227 | } |
| 4228 | |
| 4229 | // address = R[n] - 4*BitCount(registers); |
| 4230 | |
| 4231 | int32_t offset = 0; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4232 | addr_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4233 | if (!success) |
| 4234 | return false; |
| 4235 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4236 | addr_t address = Rn - (addr_byte_size * BitCount (registers)); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4237 | |
| 4238 | EmulateInstruction::Context context; |
| 4239 | context.type = EmulateInstruction::eContextRegisterStore; |
| 4240 | Register base_reg; |
| 4241 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 4242 | |
| 4243 | // for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4244 | uint32_t lowest_set_bit = 14; |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4245 | for (int i = 0; i < 14; ++i) |
| 4246 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4247 | // if registers<i> == '1' then |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4248 | if (BitIsSet (registers, i)) |
| 4249 | { |
| 4250 | if (i < lowest_set_bit) |
| 4251 | lowest_set_bit = i; |
| 4252 | // if i == n && wback && i != LowestSetBit(registers) then |
| 4253 | if ((i == n) && wback && (i != lowest_set_bit)) |
| 4254 | // MemA[address,4] = bits(32) UNKNOWN; // Only possible for encoding A1 |
| 4255 | WriteBits32UnknownToMemory (address + offset); |
| 4256 | else |
| 4257 | { |
| 4258 | // MemA[address,4] = R[i]; |
| 4259 | uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + i, 0, &success); |
| 4260 | if (!success) |
| 4261 | return false; |
| 4262 | |
| 4263 | Register data_reg; |
| 4264 | data_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + i); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4265 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, Rn - (address + offset)); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 4266 | if (!MemAWrite (context, address + offset, data, addr_byte_size)) |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4267 | return false; |
| 4268 | } |
| 4269 | |
| 4270 | // address = address + 4; |
| 4271 | offset += addr_byte_size; |
| 4272 | } |
| 4273 | } |
| 4274 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4275 | // if registers<15> == '1' then // Only possible for encoding A1 |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4276 | // MemA[address,4] = PCStoreValue(); |
| 4277 | if (BitIsSet (registers, 15)) |
| 4278 | { |
| 4279 | Register pc_reg; |
| 4280 | pc_reg.SetRegister (eRegisterKindDWARF, dwarf_pc); |
| 4281 | context.SetRegisterPlusOffset (pc_reg, 8); |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 4282 | const uint32_t pc = ReadCoreReg (PC_REG, &success); |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4283 | if (!success) |
| 4284 | return false; |
| 4285 | |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 4286 | if (!MemAWrite (context, address + offset, pc, addr_byte_size)) |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4287 | return false; |
| 4288 | } |
| 4289 | |
| 4290 | // if wback then R[n] = R[n] - 4*BitCount(registers); |
| 4291 | if (wback) |
| 4292 | { |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4293 | offset = (addr_byte_size * BitCount (registers)) * -1; |
| 4294 | context.type = EmulateInstruction::eContextAdjustBaseRegister; |
| 4295 | context.SetImmediateSigned (offset); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4296 | addr_t data = Rn + offset; |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4297 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, data)) |
| 4298 | return false; |
| 4299 | } |
| 4300 | } |
| 4301 | return true; |
| 4302 | } |
| 4303 | |
| 4304 | // STMIB (Store Multiple Increment Before) stores multiple registers to consecutive memory locations using an address |
| 4305 | // from a base register. The consecutive memory locations start just above this address, and the address of the last |
| 4306 | // of those locations can optionally be written back to the base register. |
| 4307 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4308 | EmulateInstructionARM::EmulateSTMIB (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4309 | { |
| 4310 | #if 0 |
| 4311 | if ConditionPassed() then |
| 4312 | EncodingSpecificOperations(); |
| 4313 | address = R[n] + 4; |
| 4314 | |
| 4315 | for i = 0 to 14 |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4316 | if registers<i> == '1' then |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4317 | if i == n && wback && i != LowestSetBit(registers) then |
| 4318 | MemA[address,4] = bits(32) UNKNOWN; |
| 4319 | else |
| 4320 | MemA[address,4] = R[i]; |
| 4321 | address = address + 4; |
| 4322 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4323 | if registers<15> == '1' then |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4324 | MemA[address,4] = PCStoreValue(); |
| 4325 | |
| 4326 | if wback then R[n] = R[n] + 4*BitCount(registers); |
| 4327 | #endif |
| 4328 | |
| 4329 | bool success = false; |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4330 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4331 | if (ConditionPassed(opcode)) |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4332 | { |
| 4333 | uint32_t n; |
| 4334 | uint32_t registers = 0; |
| 4335 | bool wback; |
| 4336 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 4337 | |
| 4338 | // EncodingSpecificOperations(); |
| 4339 | switch (encoding) |
| 4340 | { |
| 4341 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4342 | // n = UInt(Rn); registers = register_list; wback = (W == '1'); |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4343 | n = Bits32 (opcode, 19, 16); |
| 4344 | registers = Bits32 (opcode, 15, 0); |
| 4345 | wback = BitIsSet (opcode, 21); |
| 4346 | |
| 4347 | // if n == 15 || BitCount(registers) < 1 then UNPREDICTABLE; |
| 4348 | if ((n == 15) && (BitCount (registers) < 1)) |
| 4349 | return false; |
| 4350 | break; |
| 4351 | default: |
| 4352 | return false; |
| 4353 | } |
| 4354 | // address = R[n] + 4; |
| 4355 | |
| 4356 | int32_t offset = 0; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4357 | addr_t Rn = ReadCoreReg (n, &success); |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4358 | if (!success) |
| 4359 | return false; |
| 4360 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4361 | addr_t address = Rn + addr_byte_size; |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4362 | |
| 4363 | EmulateInstruction::Context context; |
| 4364 | context.type = EmulateInstruction::eContextRegisterStore; |
| 4365 | Register base_reg; |
| 4366 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 4367 | |
| 4368 | uint32_t lowest_set_bit = 14; |
| 4369 | // for i = 0 to 14 |
| 4370 | for (int i = 0; i < 14; ++i) |
| 4371 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4372 | // if registers<i> == '1' then |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4373 | if (BitIsSet (registers, i)) |
| 4374 | { |
| 4375 | if (i < lowest_set_bit) |
| 4376 | lowest_set_bit = i; |
| 4377 | // if i == n && wback && i != LowestSetBit(registers) then |
| 4378 | if ((i == n) && wback && (i != lowest_set_bit)) |
| 4379 | // MemA[address,4] = bits(32) UNKNOWN; |
| 4380 | WriteBits32UnknownToMemory (address + offset); |
| 4381 | // else |
| 4382 | else |
| 4383 | { |
| 4384 | // MemA[address,4] = R[i]; |
| 4385 | uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + i, 0, &success); |
| 4386 | if (!success) |
| 4387 | return false; |
| 4388 | |
| 4389 | Register data_reg; |
| 4390 | data_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + i); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4391 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, offset + addr_byte_size); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 4392 | if (!MemAWrite (context, address + offset, data, addr_byte_size)) |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4393 | return false; |
| 4394 | } |
| 4395 | |
| 4396 | // address = address + 4; |
| 4397 | offset += addr_byte_size; |
| 4398 | } |
| 4399 | } |
| 4400 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4401 | // if registers<15> == '1' then |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4402 | // MemA[address,4] = PCStoreValue(); |
| 4403 | if (BitIsSet (registers, 15)) |
| 4404 | { |
| 4405 | Register pc_reg; |
| 4406 | pc_reg.SetRegister (eRegisterKindDWARF, dwarf_pc); |
| 4407 | context.SetRegisterPlusOffset (pc_reg, 8); |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 4408 | const uint32_t pc = ReadCoreReg (PC_REG, &success); |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4409 | if (!success) |
| 4410 | return false; |
| 4411 | |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 4412 | if (!MemAWrite (context, address + offset, pc, addr_byte_size)) |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4413 | return false; |
| 4414 | } |
| 4415 | |
| 4416 | // if wback then R[n] = R[n] + 4*BitCount(registers); |
| 4417 | if (wback) |
| 4418 | { |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4419 | offset = addr_byte_size * BitCount (registers); |
| 4420 | context.type = EmulateInstruction::eContextAdjustBaseRegister; |
| 4421 | context.SetImmediateSigned (offset); |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4422 | addr_t data = Rn + offset; |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4423 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, data)) |
| 4424 | return false; |
| 4425 | } |
| 4426 | } |
| 4427 | return true; |
| 4428 | } |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4429 | |
| 4430 | // STR (store immediate) calcualtes an address from a base register value and an immediate offset, and stores a word |
| 4431 | // from a register to memory. It can use offset, post-indexed, or pre-indexed addressing. |
| 4432 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4433 | EmulateInstructionARM::EmulateSTRThumb (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4434 | { |
| 4435 | #if 0 |
| 4436 | if ConditionPassed() then |
| 4437 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 4438 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 4439 | address = if index then offset_addr else R[n]; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4440 | if UnalignedSupport() || address<1:0> == '00' then |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4441 | MemU[address,4] = R[t]; |
| 4442 | else // Can only occur before ARMv7 |
| 4443 | MemU[address,4] = bits(32) UNKNOWN; |
| 4444 | if wback then R[n] = offset_addr; |
| 4445 | #endif |
Caroline Tice | b6f8d7e | 2011-02-15 18:10:01 +0000 | [diff] [blame] | 4446 | |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4447 | bool success = false; |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4448 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4449 | if (ConditionPassed(opcode)) |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4450 | { |
| 4451 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 4452 | |
| 4453 | uint32_t t; |
| 4454 | uint32_t n; |
| 4455 | uint32_t imm32; |
| 4456 | bool index; |
| 4457 | bool add; |
| 4458 | bool wback; |
| 4459 | // EncodingSpecificOperations (); NullCheckIfThumbEE(n); |
| 4460 | switch (encoding) |
| 4461 | { |
| 4462 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4463 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm5:'00', 32); |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4464 | t = Bits32 (opcode, 2, 0); |
| 4465 | n = Bits32 (opcode, 5, 3); |
| 4466 | imm32 = Bits32 (opcode, 10, 6) << 2; |
| 4467 | |
| 4468 | // index = TRUE; add = TRUE; wback = FALSE; |
| 4469 | index = true; |
| 4470 | add = false; |
| 4471 | wback = false; |
| 4472 | break; |
| 4473 | |
| 4474 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4475 | // t = UInt(Rt); n = 13; imm32 = ZeroExtend(imm8:'00', 32); |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4476 | t = Bits32 (opcode, 10, 8); |
| 4477 | n = 13; |
| 4478 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 4479 | |
| 4480 | // index = TRUE; add = TRUE; wback = FALSE; |
| 4481 | index = true; |
| 4482 | add = true; |
| 4483 | wback = false; |
| 4484 | break; |
| 4485 | |
| 4486 | case eEncodingT3: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4487 | // if Rn == '1111' then UNDEFINED; |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4488 | if (Bits32 (opcode, 19, 16) == 15) |
| 4489 | return false; |
| 4490 | |
| 4491 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 4492 | t = Bits32 (opcode, 15, 12); |
| 4493 | n = Bits32 (opcode, 19, 16); |
| 4494 | imm32 = Bits32 (opcode, 11, 0); |
| 4495 | |
| 4496 | // index = TRUE; add = TRUE; wback = FALSE; |
| 4497 | index = true; |
| 4498 | add = true; |
| 4499 | wback = false; |
| 4500 | |
| 4501 | // if t == 15 then UNPREDICTABLE; |
| 4502 | if (t == 15) |
| 4503 | return false; |
| 4504 | break; |
| 4505 | |
| 4506 | case eEncodingT4: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4507 | // if P == '1' && U == '1' && W == '0' then SEE STRT; |
| 4508 | // if Rn == '1101' && P == '1' && U == '0' && W == '1' && imm8 == '00000100' then SEE PUSH; |
| 4509 | // if Rn == '1111' || (P == '0' && W == '0') then UNDEFINED; |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4510 | if ((Bits32 (opcode, 19, 16) == 15) |
| 4511 | || (BitIsClear (opcode, 10) && BitIsClear (opcode, 8))) |
| 4512 | return false; |
| 4513 | |
| 4514 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm8, 32); |
| 4515 | t = Bits32 (opcode, 15, 12); |
| 4516 | n = Bits32 (opcode, 19, 16); |
| 4517 | imm32 = Bits32 (opcode, 7, 0); |
| 4518 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4519 | // index = (P == '1'); add = (U == '1'); wback = (W == '1'); |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4520 | index = BitIsSet (opcode, 10); |
| 4521 | add = BitIsSet (opcode, 9); |
| 4522 | wback = BitIsSet (opcode, 8); |
| 4523 | |
| 4524 | // if t == 15 || (wback && n == t) then UNPREDICTABLE; |
| 4525 | if ((t == 15) || (wback && (n == t))) |
| 4526 | return false; |
| 4527 | break; |
| 4528 | |
| 4529 | default: |
| 4530 | return false; |
| 4531 | } |
| 4532 | |
| 4533 | addr_t offset_addr; |
| 4534 | addr_t address; |
| 4535 | |
| 4536 | // offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
Caroline Tice | baf1f64 | 2011-03-24 19:23:45 +0000 | [diff] [blame] | 4537 | uint32_t base_address = ReadCoreReg (n, &success); |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4538 | if (!success) |
| 4539 | return false; |
| 4540 | |
| 4541 | if (add) |
| 4542 | offset_addr = base_address + imm32; |
| 4543 | else |
| 4544 | offset_addr = base_address - imm32; |
| 4545 | |
| 4546 | // address = if index then offset_addr else R[n]; |
| 4547 | if (index) |
| 4548 | address = offset_addr; |
| 4549 | else |
| 4550 | address = base_address; |
| 4551 | |
| 4552 | EmulateInstruction::Context context; |
| 4553 | context.type = eContextRegisterStore; |
| 4554 | Register base_reg; |
| 4555 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 4556 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4557 | // if UnalignedSupport() || address<1:0> == '00' then |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4558 | if (UnalignedSupport () || (BitIsClear (address, 1) && BitIsClear (address, 0))) |
| 4559 | { |
| 4560 | // MemU[address,4] = R[t]; |
| 4561 | uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + t, 0, &success); |
| 4562 | if (!success) |
| 4563 | return false; |
| 4564 | |
| 4565 | Register data_reg; |
| 4566 | data_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + t); |
| 4567 | int32_t offset = address - base_address; |
| 4568 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, offset); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 4569 | if (!MemUWrite (context, address, data, addr_byte_size)) |
Caroline Tice | 7fac857 | 2011-02-15 22:53:54 +0000 | [diff] [blame] | 4570 | return false; |
| 4571 | } |
| 4572 | else |
| 4573 | { |
| 4574 | // MemU[address,4] = bits(32) UNKNOWN; |
| 4575 | WriteBits32UnknownToMemory (address); |
| 4576 | } |
| 4577 | |
| 4578 | // if wback then R[n] = offset_addr; |
| 4579 | if (wback) |
| 4580 | { |
| 4581 | context.type = eContextRegisterLoad; |
| 4582 | context.SetAddress (offset_addr); |
| 4583 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 4584 | return false; |
| 4585 | } |
| 4586 | } |
| 4587 | return true; |
| 4588 | } |
Caroline Tice | af55656 | 2011-02-15 18:42:15 +0000 | [diff] [blame] | 4589 | |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4590 | // STR (Store Register) calculates an address from a base register value and an offset register value, stores a |
| 4591 | // word from a register to memory. The offset register value can optionally be shifted. |
| 4592 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4593 | EmulateInstructionARM::EmulateSTRRegister (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4594 | { |
| 4595 | #if 0 |
| 4596 | if ConditionPassed() then |
| 4597 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 4598 | offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 4599 | offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 4600 | address = if index then offset_addr else R[n]; |
| 4601 | if t == 15 then // Only possible for encoding A1 |
| 4602 | data = PCStoreValue(); |
| 4603 | else |
| 4604 | data = R[t]; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4605 | if UnalignedSupport() || address<1:0> == '00' || CurrentInstrSet() == InstrSet_ARM then |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4606 | MemU[address,4] = data; |
| 4607 | else // Can only occur before ARMv7 |
| 4608 | MemU[address,4] = bits(32) UNKNOWN; |
| 4609 | if wback then R[n] = offset_addr; |
| 4610 | #endif |
| 4611 | |
| 4612 | bool success = false; |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4613 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4614 | if (ConditionPassed(opcode)) |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4615 | { |
| 4616 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 4617 | |
| 4618 | uint32_t t; |
| 4619 | uint32_t n; |
| 4620 | uint32_t m; |
| 4621 | ARM_ShifterType shift_t; |
| 4622 | uint32_t shift_n; |
| 4623 | bool index; |
| 4624 | bool add; |
| 4625 | bool wback; |
| 4626 | |
| 4627 | // EncodingSpecificOperations (); NullCheckIfThumbEE(n); |
| 4628 | switch (encoding) |
| 4629 | { |
| 4630 | case eEncodingT1: |
| 4631 | // if CurrentInstrSet() == InstrSet_ThumbEE then SEE "Modified operation in ThumbEE"; |
| 4632 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 4633 | t = Bits32 (opcode, 2, 0); |
| 4634 | n = Bits32 (opcode, 5, 3); |
| 4635 | m = Bits32 (opcode, 8, 6); |
| 4636 | |
| 4637 | // index = TRUE; add = TRUE; wback = FALSE; |
| 4638 | index = true; |
| 4639 | add = true; |
| 4640 | wback = false; |
| 4641 | |
| 4642 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 4643 | shift_t = SRType_LSL; |
| 4644 | shift_n = 0; |
| 4645 | break; |
| 4646 | |
| 4647 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4648 | // if Rn == '1111' then UNDEFINED; |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4649 | if (Bits32 (opcode, 19, 16) == 15) |
| 4650 | return false; |
| 4651 | |
| 4652 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 4653 | t = Bits32 (opcode, 15, 12); |
| 4654 | n = Bits32 (opcode, 19, 16); |
| 4655 | m = Bits32 (opcode, 3, 0); |
| 4656 | |
| 4657 | // index = TRUE; add = TRUE; wback = FALSE; |
| 4658 | index = true; |
| 4659 | add = true; |
| 4660 | wback = false; |
| 4661 | |
| 4662 | // (shift_t, shift_n) = (SRType_LSL, UInt(imm2)); |
| 4663 | shift_t = SRType_LSL; |
| 4664 | shift_n = Bits32 (opcode, 5, 4); |
| 4665 | |
| 4666 | // if t == 15 || BadReg(m) then UNPREDICTABLE; |
| 4667 | if ((t == 15) || (BadReg (m))) |
| 4668 | return false; |
| 4669 | break; |
| 4670 | |
| 4671 | case eEncodingA1: |
| 4672 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4673 | // if P == '0' && W == '1' then SEE STRT; |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4674 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 4675 | t = Bits32 (opcode, 15, 12); |
| 4676 | n = Bits32 (opcode, 19, 16); |
| 4677 | m = Bits32 (opcode, 3, 0); |
| 4678 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4679 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4680 | index = BitIsSet (opcode, 24); |
| 4681 | add = BitIsSet (opcode, 23); |
| 4682 | wback = (BitIsClear (opcode, 24) || BitIsSet (opcode, 21)); |
| 4683 | |
| 4684 | // (shift_t, shift_n) = DecodeImmShift(type, imm5); |
| 4685 | uint32_t typ = Bits32 (opcode, 6, 5); |
| 4686 | uint32_t imm5 = Bits32 (opcode, 11, 7); |
| 4687 | shift_n = DecodeImmShift(typ, imm5, shift_t); |
| 4688 | |
| 4689 | // if m == 15 then UNPREDICTABLE; |
| 4690 | if (m == 15) |
| 4691 | return false; |
| 4692 | |
| 4693 | // if wback && (n == 15 || n == t) then UNPREDICTABLE; |
| 4694 | if (wback && ((n == 15) || (n == t))) |
| 4695 | return false; |
| 4696 | |
| 4697 | break; |
| 4698 | } |
| 4699 | default: |
| 4700 | return false; |
| 4701 | } |
| 4702 | |
| 4703 | addr_t offset_addr; |
| 4704 | addr_t address; |
| 4705 | int32_t offset = 0; |
| 4706 | |
| 4707 | addr_t base_address = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 4708 | if (!success) |
| 4709 | return false; |
| 4710 | |
| 4711 | uint32_t Rm_data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 4712 | if (!success) |
| 4713 | return false; |
| 4714 | |
| 4715 | // offset = Shift(R[m], shift_t, shift_n, APSR.C); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 4716 | offset = Shift (Rm_data, shift_t, shift_n, APSR_C); |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4717 | |
| 4718 | // offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 4719 | if (add) |
| 4720 | offset_addr = base_address + offset; |
| 4721 | else |
| 4722 | offset_addr = base_address - offset; |
| 4723 | |
| 4724 | // address = if index then offset_addr else R[n]; |
| 4725 | if (index) |
| 4726 | address = offset_addr; |
| 4727 | else |
| 4728 | address = base_address; |
| 4729 | |
| 4730 | uint32_t data; |
| 4731 | // if t == 15 then // Only possible for encoding A1 |
| 4732 | if (t == 15) |
| 4733 | // data = PCStoreValue(); |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 4734 | data = ReadCoreReg (PC_REG, &success); |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4735 | else |
| 4736 | // data = R[t]; |
| 4737 | data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + t, 0, &success); |
| 4738 | |
| 4739 | if (!success) |
| 4740 | return false; |
| 4741 | |
| 4742 | EmulateInstruction::Context context; |
| 4743 | context.type = eContextRegisterStore; |
| 4744 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4745 | // if UnalignedSupport() || address<1:0> == '00' || CurrentInstrSet() == InstrSet_ARM then |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4746 | if (UnalignedSupport () |
| 4747 | || (BitIsClear (address, 1) && BitIsClear (address, 0)) |
| 4748 | || CurrentInstrSet() == eModeARM) |
| 4749 | { |
| 4750 | // MemU[address,4] = data; |
| 4751 | |
| 4752 | Register base_reg; |
| 4753 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 4754 | |
| 4755 | Register data_reg; |
| 4756 | data_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + t); |
| 4757 | |
| 4758 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - base_address); |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 4759 | if (!MemUWrite (context, address, data, addr_byte_size)) |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 4760 | return false; |
| 4761 | |
| 4762 | } |
| 4763 | else |
| 4764 | // MemU[address,4] = bits(32) UNKNOWN; |
| 4765 | WriteBits32UnknownToMemory (address); |
| 4766 | |
| 4767 | // if wback then R[n] = offset_addr; |
| 4768 | if (wback) |
| 4769 | { |
| 4770 | context.type = eContextRegisterLoad; |
| 4771 | context.SetAddress (offset_addr); |
| 4772 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 4773 | return false; |
| 4774 | } |
| 4775 | |
| 4776 | } |
| 4777 | return true; |
| 4778 | } |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4779 | |
| 4780 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4781 | EmulateInstructionARM::EmulateSTRBThumb (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4782 | { |
| 4783 | #if 0 |
| 4784 | if ConditionPassed() then |
| 4785 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 4786 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 4787 | address = if index then offset_addr else R[n]; |
| 4788 | MemU[address,1] = R[t]<7:0>; |
| 4789 | if wback then R[n] = offset_addr; |
| 4790 | #endif |
| 4791 | |
| 4792 | |
| 4793 | bool success = false; |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4794 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4795 | if (ConditionPassed(opcode)) |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4796 | { |
| 4797 | uint32_t t; |
| 4798 | uint32_t n; |
| 4799 | uint32_t imm32; |
| 4800 | bool index; |
| 4801 | bool add; |
| 4802 | bool wback; |
| 4803 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 4804 | switch (encoding) |
| 4805 | { |
| 4806 | case eEncodingT1: |
| 4807 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm5, 32); |
| 4808 | t = Bits32 (opcode, 2, 0); |
| 4809 | n = Bits32 (opcode, 5, 3); |
| 4810 | imm32 = Bits32 (opcode, 10, 6); |
| 4811 | |
| 4812 | // index = TRUE; add = TRUE; wback = FALSE; |
| 4813 | index = true; |
| 4814 | add = true; |
| 4815 | wback = false; |
| 4816 | break; |
| 4817 | |
| 4818 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4819 | // if Rn == '1111' then UNDEFINED; |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4820 | if (Bits32 (opcode, 19, 16) == 15) |
| 4821 | return false; |
| 4822 | |
| 4823 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 4824 | t = Bits32 (opcode, 15, 12); |
| 4825 | n = Bits32 (opcode, 19, 16); |
| 4826 | imm32 = Bits32 (opcode, 11, 0); |
| 4827 | |
| 4828 | // index = TRUE; add = TRUE; wback = FALSE; |
| 4829 | index = true; |
| 4830 | add = true; |
| 4831 | wback = false; |
| 4832 | |
| 4833 | // if BadReg(t) then UNPREDICTABLE; |
| 4834 | if (BadReg (t)) |
| 4835 | return false; |
| 4836 | break; |
| 4837 | |
| 4838 | case eEncodingT3: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4839 | // if P == '1' && U == '1' && W == '0' then SEE STRBT; |
| 4840 | // if Rn == '1111' || (P == '0' && W == '0') then UNDEFINED; |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4841 | if (Bits32 (opcode, 19, 16) == 15) |
| 4842 | return false; |
| 4843 | |
| 4844 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm8, 32); |
| 4845 | t = Bits32 (opcode, 15, 12); |
| 4846 | n = Bits32 (opcode, 19, 16); |
| 4847 | imm32 = Bits32 (opcode, 7, 0); |
| 4848 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4849 | // index = (P == '1'); add = (U == '1'); wback = (W == '1'); |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4850 | index = BitIsSet (opcode, 10); |
| 4851 | add = BitIsSet (opcode, 9); |
| 4852 | wback = BitIsSet (opcode, 8); |
| 4853 | |
| 4854 | // if BadReg(t) || (wback && n == t) then UNPREDICTABLE |
| 4855 | if ((BadReg (t)) || (wback && (n == t))) |
| 4856 | return false; |
| 4857 | break; |
| 4858 | |
| 4859 | default: |
| 4860 | return false; |
| 4861 | } |
| 4862 | |
| 4863 | addr_t offset_addr; |
| 4864 | addr_t address; |
| 4865 | addr_t base_address = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 4866 | if (!success) |
| 4867 | return false; |
| 4868 | |
| 4869 | // offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 4870 | if (add) |
| 4871 | offset_addr = base_address + imm32; |
| 4872 | else |
| 4873 | offset_addr = base_address - imm32; |
| 4874 | |
| 4875 | // address = if index then offset_addr else R[n]; |
| 4876 | if (index) |
| 4877 | address = offset_addr; |
| 4878 | else |
| 4879 | address = base_address; |
| 4880 | |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 4881 | // MemU[address,1] = R[t]<7:0> |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4882 | Register base_reg; |
| 4883 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 4884 | |
| 4885 | Register data_reg; |
| 4886 | data_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + t); |
| 4887 | |
| 4888 | EmulateInstruction::Context context; |
| 4889 | context.type = eContextRegisterStore; |
| 4890 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - base_address); |
| 4891 | |
| 4892 | uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + t, 0, &success); |
| 4893 | if (!success) |
| 4894 | return false; |
| 4895 | |
| 4896 | data = Bits32 (data, 7, 0); |
| 4897 | |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 4898 | if (!MemUWrite (context, address, data, 1)) |
Caroline Tice | 73a29de | 2011-02-16 20:22:22 +0000 | [diff] [blame] | 4899 | return false; |
| 4900 | |
| 4901 | // if wback then R[n] = offset_addr; |
| 4902 | if (wback) |
| 4903 | { |
| 4904 | context.type = eContextRegisterLoad; |
| 4905 | context.SetAddress (offset_addr); |
| 4906 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 4907 | return false; |
| 4908 | } |
| 4909 | |
| 4910 | } |
| 4911 | |
| 4912 | return true; |
| 4913 | } |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 4914 | |
| 4915 | // STRH (register) calculates an address from a base register value and an offset register value, and stores a |
| 4916 | // halfword from a register to memory. The offset register alue can be shifted left by 0, 1, 2, or 3 bits. |
| 4917 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4918 | EmulateInstructionARM::EmulateSTRHRegister (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 4919 | { |
| 4920 | #if 0 |
| 4921 | if ConditionPassed() then |
| 4922 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 4923 | offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 4924 | offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 4925 | address = if index then offset_addr else R[n]; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4926 | if UnalignedSupport() || address<0> == '0' then |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 4927 | MemU[address,2] = R[t]<15:0>; |
| 4928 | else // Can only occur before ARMv7 |
| 4929 | MemU[address,2] = bits(16) UNKNOWN; |
| 4930 | if wback then R[n] = offset_addr; |
| 4931 | #endif |
| 4932 | |
| 4933 | bool success = false; |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 4934 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 4935 | if (ConditionPassed(opcode)) |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 4936 | { |
| 4937 | uint32_t t; |
| 4938 | uint32_t n; |
| 4939 | uint32_t m; |
| 4940 | bool index; |
| 4941 | bool add; |
| 4942 | bool wback; |
| 4943 | ARM_ShifterType shift_t; |
| 4944 | uint32_t shift_n; |
| 4945 | |
| 4946 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 4947 | switch (encoding) |
| 4948 | { |
| 4949 | case eEncodingT1: |
| 4950 | // if CurrentInstrSet() == InstrSet_ThumbEE then SEE "Modified operation in ThumbEE"; |
| 4951 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 4952 | t = Bits32 (opcode, 2, 0); |
| 4953 | n = Bits32 (opcode, 5, 3); |
| 4954 | m = Bits32 (opcode, 8, 6); |
| 4955 | |
| 4956 | // index = TRUE; add = TRUE; wback = FALSE; |
| 4957 | index = true; |
| 4958 | add = true; |
| 4959 | wback = false; |
| 4960 | |
| 4961 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 4962 | shift_t = SRType_LSL; |
| 4963 | shift_n = 0; |
| 4964 | |
| 4965 | break; |
| 4966 | |
| 4967 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4968 | // if Rn == '1111' then UNDEFINED; |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 4969 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 4970 | t = Bits32 (opcode, 15, 12); |
| 4971 | n = Bits32 (opcode, 19, 16); |
| 4972 | m = Bits32 (opcode, 3, 0); |
| 4973 | if (n == 15) |
| 4974 | return false; |
| 4975 | |
| 4976 | // index = TRUE; add = TRUE; wback = FALSE; |
| 4977 | index = true; |
| 4978 | add = true; |
| 4979 | wback = false; |
| 4980 | |
| 4981 | // (shift_t, shift_n) = (SRType_LSL, UInt(imm2)); |
| 4982 | shift_t = SRType_LSL; |
| 4983 | shift_n = Bits32 (opcode, 5, 4); |
| 4984 | |
| 4985 | // if BadReg(t) || BadReg(m) then UNPREDICTABLE; |
| 4986 | if (BadReg (t) || BadReg (m)) |
| 4987 | return false; |
| 4988 | |
| 4989 | break; |
| 4990 | |
| 4991 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4992 | // if P == '0' && W == '1' then SEE STRHT; |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 4993 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 4994 | t = Bits32 (opcode, 15, 12); |
| 4995 | n = Bits32 (opcode, 19, 16); |
| 4996 | m = Bits32 (opcode, 3, 0); |
| 4997 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 4998 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 4999 | index = BitIsSet (opcode, 24); |
| 5000 | add = BitIsSet (opcode, 23); |
| 5001 | wback = (BitIsClear (opcode, 24) || BitIsSet (opcode, 21)); |
| 5002 | |
| 5003 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 5004 | shift_t = SRType_LSL; |
| 5005 | shift_n = 0; |
| 5006 | |
| 5007 | // if t == 15 || m == 15 then UNPREDICTABLE; |
| 5008 | if ((t == 15) || (m == 15)) |
| 5009 | return false; |
| 5010 | |
| 5011 | // if wback && (n == 15 || n == t) then UNPREDICTABLE; |
| 5012 | if (wback && ((n == 15) || (n == t))) |
| 5013 | return false; |
| 5014 | |
| 5015 | break; |
| 5016 | |
| 5017 | default: |
| 5018 | return false; |
| 5019 | } |
| 5020 | |
| 5021 | uint32_t Rm = ReadCoreReg (m, &success); |
| 5022 | if (!success) |
| 5023 | return false; |
| 5024 | |
| 5025 | uint32_t Rn = ReadCoreReg (n, &success); |
| 5026 | if (!success) |
| 5027 | return false; |
| 5028 | |
| 5029 | // offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 5030 | uint32_t offset = Shift (Rm, shift_t, shift_n, APSR_C); |
| 5031 | |
| 5032 | // offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 5033 | addr_t offset_addr; |
| 5034 | if (add) |
| 5035 | offset_addr = Rn + offset; |
| 5036 | else |
| 5037 | offset_addr = Rn - offset; |
| 5038 | |
| 5039 | // address = if index then offset_addr else R[n]; |
| 5040 | addr_t address; |
| 5041 | if (index) |
| 5042 | address = offset_addr; |
| 5043 | else |
| 5044 | address = Rn; |
| 5045 | |
| 5046 | EmulateInstruction::Context context; |
| 5047 | context.type = eContextRegisterStore; |
| 5048 | Register base_reg; |
| 5049 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 5050 | Register offset_reg; |
| 5051 | offset_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + m); |
| 5052 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5053 | // if UnalignedSupport() || address<0> == '0' then |
Caroline Tice | 8ce836d | 2011-03-16 22:46:55 +0000 | [diff] [blame] | 5054 | if (UnalignedSupport() || BitIsClear (address, 0)) |
| 5055 | { |
| 5056 | // MemU[address,2] = R[t]<15:0>; |
| 5057 | uint32_t Rt = ReadCoreReg (t, &success); |
| 5058 | if (!success) |
| 5059 | return false; |
| 5060 | |
| 5061 | EmulateInstruction::Context context; |
| 5062 | context.type = eContextRegisterStore; |
| 5063 | Register base_reg; |
| 5064 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 5065 | Register offset_reg; |
| 5066 | offset_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + m); |
| 5067 | Register data_reg; |
| 5068 | data_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + t); |
| 5069 | context.SetRegisterToRegisterPlusIndirectOffset (base_reg, offset_reg, data_reg); |
| 5070 | |
| 5071 | if (!MemUWrite (context, address, Bits32 (Rt, 15, 0), 2)) |
| 5072 | return false; |
| 5073 | } |
| 5074 | else // Can only occur before ARMv7 |
| 5075 | { |
| 5076 | // MemU[address,2] = bits(16) UNKNOWN; |
| 5077 | } |
| 5078 | |
| 5079 | // if wback then R[n] = offset_addr; |
| 5080 | if (wback) |
| 5081 | { |
| 5082 | context.type = eContextAdjustBaseRegister; |
| 5083 | context.SetAddress (offset_addr); |
| 5084 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 5085 | return false; |
| 5086 | } |
| 5087 | } |
| 5088 | |
| 5089 | return true; |
| 5090 | } |
Caroline Tice | 3fd63e9 | 2011-02-16 00:33:43 +0000 | [diff] [blame] | 5091 | |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5092 | // Add with Carry (immediate) adds an immediate value and the carry flag value to a register value, |
| 5093 | // and writes the result to the destination register. It can optionally update the condition flags |
| 5094 | // based on the result. |
| 5095 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5096 | EmulateInstructionARM::EmulateADCImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5097 | { |
| 5098 | #if 0 |
| 5099 | // ARM pseudo code... |
| 5100 | if ConditionPassed() then |
| 5101 | EncodingSpecificOperations(); |
| 5102 | (result, carry, overflow) = AddWithCarry(R[n], imm32, APSR.C); |
| 5103 | if d == 15 then // Can only occur for ARM encoding |
| 5104 | ALUWritePC(result); // setflags is always FALSE here |
| 5105 | else |
| 5106 | R[d] = result; |
| 5107 | if setflags then |
| 5108 | APSR.N = result<31>; |
| 5109 | APSR.Z = IsZeroBit(result); |
| 5110 | APSR.C = carry; |
| 5111 | APSR.V = overflow; |
| 5112 | #endif |
| 5113 | |
| 5114 | bool success = false; |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5115 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5116 | if (ConditionPassed(opcode)) |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5117 | { |
| 5118 | uint32_t Rd, Rn; |
| 5119 | uint32_t imm32; // the immediate value to be added to the value obtained from Rn |
| 5120 | bool setflags; |
| 5121 | switch (encoding) |
| 5122 | { |
| 5123 | case eEncodingT1: |
| 5124 | Rd = Bits32(opcode, 11, 8); |
| 5125 | Rn = Bits32(opcode, 19, 16); |
| 5126 | setflags = BitIsSet(opcode, 20); |
| 5127 | imm32 = ThumbExpandImm(opcode); // imm32 = ThumbExpandImm(i:imm3:imm8) |
| 5128 | if (BadReg(Rd) || BadReg(Rn)) |
| 5129 | return false; |
| 5130 | break; |
| 5131 | case eEncodingA1: |
| 5132 | Rd = Bits32(opcode, 15, 12); |
| 5133 | Rn = Bits32(opcode, 19, 16); |
| 5134 | setflags = BitIsSet(opcode, 20); |
| 5135 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5136 | |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5137 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5138 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5139 | break; |
| 5140 | default: |
| 5141 | return false; |
| 5142 | } |
| 5143 | |
| 5144 | // Read the first operand. |
| 5145 | int32_t val1 = ReadCoreReg(Rn, &success); |
| 5146 | if (!success) |
| 5147 | return false; |
| 5148 | |
| 5149 | AddWithCarryResult res = AddWithCarry(val1, imm32, APSR_C); |
| 5150 | |
| 5151 | EmulateInstruction::Context context; |
| 5152 | context.type = EmulateInstruction::eContextImmediate; |
| 5153 | context.SetNoArgs (); |
| 5154 | |
| 5155 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 5156 | return false; |
| 5157 | } |
| 5158 | return true; |
| 5159 | } |
| 5160 | |
| 5161 | // Add with Carry (register) adds a register value, the carry flag value, and an optionally-shifted |
| 5162 | // register value, and writes the result to the destination register. It can optionally update the |
| 5163 | // condition flags based on the result. |
| 5164 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5165 | EmulateInstructionARM::EmulateADCReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5166 | { |
| 5167 | #if 0 |
| 5168 | // ARM pseudo code... |
| 5169 | if ConditionPassed() then |
| 5170 | EncodingSpecificOperations(); |
| 5171 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 5172 | (result, carry, overflow) = AddWithCarry(R[n], shifted, APSR.C); |
| 5173 | if d == 15 then // Can only occur for ARM encoding |
| 5174 | ALUWritePC(result); // setflags is always FALSE here |
| 5175 | else |
| 5176 | R[d] = result; |
| 5177 | if setflags then |
| 5178 | APSR.N = result<31>; |
| 5179 | APSR.Z = IsZeroBit(result); |
| 5180 | APSR.C = carry; |
| 5181 | APSR.V = overflow; |
| 5182 | #endif |
| 5183 | |
| 5184 | bool success = false; |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5185 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5186 | if (ConditionPassed(opcode)) |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5187 | { |
| 5188 | uint32_t Rd, Rn, Rm; |
| 5189 | ARM_ShifterType shift_t; |
| 5190 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 5191 | bool setflags; |
| 5192 | switch (encoding) |
| 5193 | { |
| 5194 | case eEncodingT1: |
| 5195 | Rd = Rn = Bits32(opcode, 2, 0); |
| 5196 | Rm = Bits32(opcode, 5, 3); |
| 5197 | setflags = !InITBlock(); |
| 5198 | shift_t = SRType_LSL; |
| 5199 | shift_n = 0; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 5200 | break; |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5201 | case eEncodingT2: |
| 5202 | Rd = Bits32(opcode, 11, 8); |
| 5203 | Rn = Bits32(opcode, 19, 16); |
| 5204 | Rm = Bits32(opcode, 3, 0); |
| 5205 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 5206 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5207 | if (BadReg(Rd) || BadReg(Rn) || BadReg(Rm)) |
| 5208 | return false; |
| 5209 | break; |
| 5210 | case eEncodingA1: |
| 5211 | Rd = Bits32(opcode, 15, 12); |
| 5212 | Rn = Bits32(opcode, 19, 16); |
| 5213 | Rm = Bits32(opcode, 3, 0); |
| 5214 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 5215 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5216 | |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5217 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5218 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5219 | break; |
| 5220 | default: |
| 5221 | return false; |
| 5222 | } |
| 5223 | |
| 5224 | // Read the first operand. |
| 5225 | int32_t val1 = ReadCoreReg(Rn, &success); |
| 5226 | if (!success) |
| 5227 | return false; |
| 5228 | |
| 5229 | // Read the second operand. |
| 5230 | int32_t val2 = ReadCoreReg(Rm, &success); |
| 5231 | if (!success) |
| 5232 | return false; |
| 5233 | |
| 5234 | uint32_t shifted = Shift(val2, shift_t, shift_n, APSR_C); |
| 5235 | AddWithCarryResult res = AddWithCarry(val1, shifted, APSR_C); |
| 5236 | |
| 5237 | EmulateInstruction::Context context; |
| 5238 | context.type = EmulateInstruction::eContextImmediate; |
| 5239 | context.SetNoArgs (); |
| 5240 | |
| 5241 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 5242 | return false; |
| 5243 | } |
| 5244 | return true; |
| 5245 | } |
| 5246 | |
Johnny Chen | a695f95 | 2011-02-23 21:24:25 +0000 | [diff] [blame] | 5247 | // This instruction adds an immediate value to the PC value to form a PC-relative address, |
| 5248 | // and writes the result to the destination register. |
| 5249 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5250 | EmulateInstructionARM::EmulateADR (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | a695f95 | 2011-02-23 21:24:25 +0000 | [diff] [blame] | 5251 | { |
| 5252 | #if 0 |
| 5253 | // ARM pseudo code... |
| 5254 | if ConditionPassed() then |
| 5255 | EncodingSpecificOperations(); |
| 5256 | result = if add then (Align(PC,4) + imm32) else (Align(PC,4) - imm32); |
| 5257 | if d == 15 then // Can only occur for ARM encodings |
| 5258 | ALUWritePC(result); |
| 5259 | else |
| 5260 | R[d] = result; |
| 5261 | #endif |
| 5262 | |
| 5263 | bool success = false; |
Johnny Chen | a695f95 | 2011-02-23 21:24:25 +0000 | [diff] [blame] | 5264 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5265 | if (ConditionPassed(opcode)) |
Johnny Chen | a695f95 | 2011-02-23 21:24:25 +0000 | [diff] [blame] | 5266 | { |
| 5267 | uint32_t Rd; |
| 5268 | uint32_t imm32; // the immediate value to be added/subtracted to/from the PC |
| 5269 | bool add; |
| 5270 | switch (encoding) |
| 5271 | { |
| 5272 | case eEncodingT1: |
| 5273 | Rd = Bits32(opcode, 10, 8); |
| 5274 | imm32 = ThumbImm8Scaled(opcode); // imm32 = ZeroExtend(imm8:'00', 32) |
| 5275 | break; |
| 5276 | case eEncodingT2: |
| 5277 | case eEncodingT3: |
| 5278 | Rd = Bits32(opcode, 11, 8); |
| 5279 | imm32 = ThumbImm12(opcode); // imm32 = ZeroExtend(i:imm3:imm8, 32) |
| 5280 | add = (Bits32(opcode, 24, 21) == 0); // 0b0000 => ADD; 0b0101 => SUB |
| 5281 | if (BadReg(Rd)) |
| 5282 | return false; |
| 5283 | break; |
| 5284 | case eEncodingA1: |
| 5285 | case eEncodingA2: |
| 5286 | Rd = Bits32(opcode, 15, 12); |
| 5287 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
| 5288 | add = (Bits32(opcode, 24, 21) == 0x4); // 0b0100 => ADD; 0b0010 => SUB |
| 5289 | break; |
| 5290 | default: |
| 5291 | return false; |
| 5292 | } |
| 5293 | |
| 5294 | // Read the PC value. |
| 5295 | uint32_t pc = ReadCoreReg(PC_REG, &success); |
| 5296 | if (!success) |
| 5297 | return false; |
| 5298 | |
| 5299 | uint32_t result = (add ? Align(pc, 4) + imm32 : Align(pc, 4) - imm32); |
| 5300 | |
| 5301 | EmulateInstruction::Context context; |
| 5302 | context.type = EmulateInstruction::eContextImmediate; |
| 5303 | context.SetNoArgs (); |
| 5304 | |
| 5305 | if (!WriteCoreReg(context, result, Rd)) |
| 5306 | return false; |
| 5307 | } |
| 5308 | return true; |
| 5309 | } |
| 5310 | |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5311 | // This instruction performs a bitwise AND of a register value and an immediate value, and writes the result |
| 5312 | // to the destination register. It can optionally update the condition flags based on the result. |
| 5313 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5314 | EmulateInstructionARM::EmulateANDImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5315 | { |
| 5316 | #if 0 |
| 5317 | // ARM pseudo code... |
| 5318 | if ConditionPassed() then |
| 5319 | EncodingSpecificOperations(); |
| 5320 | result = R[n] AND imm32; |
| 5321 | if d == 15 then // Can only occur for ARM encoding |
| 5322 | ALUWritePC(result); // setflags is always FALSE here |
| 5323 | else |
| 5324 | R[d] = result; |
| 5325 | if setflags then |
| 5326 | APSR.N = result<31>; |
| 5327 | APSR.Z = IsZeroBit(result); |
| 5328 | APSR.C = carry; |
| 5329 | // APSR.V unchanged |
| 5330 | #endif |
| 5331 | |
| 5332 | bool success = false; |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5333 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5334 | if (ConditionPassed(opcode)) |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5335 | { |
| 5336 | uint32_t Rd, Rn; |
| 5337 | uint32_t imm32; // the immediate value to be ANDed to the value obtained from Rn |
| 5338 | bool setflags; |
| 5339 | uint32_t carry; // the carry bit after ARM/Thumb Expand operation |
| 5340 | switch (encoding) |
| 5341 | { |
| 5342 | case eEncodingT1: |
| 5343 | Rd = Bits32(opcode, 11, 8); |
| 5344 | Rn = Bits32(opcode, 19, 16); |
| 5345 | setflags = BitIsSet(opcode, 20); |
| 5346 | 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] | 5347 | // if Rd == '1111' && S == '1' then SEE TST (immediate); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5348 | if (Rd == 15 && setflags) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5349 | return EmulateTSTImm(opcode, eEncodingT1); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5350 | if (Rd == 13 || (Rd == 15 && !setflags) || BadReg(Rn)) |
| 5351 | return false; |
| 5352 | break; |
| 5353 | case eEncodingA1: |
| 5354 | Rd = Bits32(opcode, 15, 12); |
| 5355 | Rn = Bits32(opcode, 19, 16); |
| 5356 | setflags = BitIsSet(opcode, 20); |
| 5357 | 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] | 5358 | |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5359 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5360 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5361 | break; |
| 5362 | default: |
| 5363 | return false; |
| 5364 | } |
| 5365 | |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5366 | // Read the first operand. |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5367 | uint32_t val1 = ReadCoreReg(Rn, &success); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5368 | if (!success) |
| 5369 | return false; |
| 5370 | |
| 5371 | uint32_t result = val1 & imm32; |
| 5372 | |
| 5373 | EmulateInstruction::Context context; |
| 5374 | context.type = EmulateInstruction::eContextImmediate; |
| 5375 | context.SetNoArgs (); |
| 5376 | |
| 5377 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
| 5378 | return false; |
| 5379 | } |
| 5380 | return true; |
| 5381 | } |
| 5382 | |
| 5383 | // This instruction performs a bitwise AND of a register value and an optionally-shifted register value, |
| 5384 | // and writes the result to the destination register. It can optionally update the condition flags |
| 5385 | // based on the result. |
| 5386 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5387 | EmulateInstructionARM::EmulateANDReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5388 | { |
| 5389 | #if 0 |
| 5390 | // ARM pseudo code... |
| 5391 | if ConditionPassed() then |
| 5392 | EncodingSpecificOperations(); |
| 5393 | (shifted, carry) = Shift_C(R[m], shift_t, shift_n, APSR.C); |
| 5394 | result = R[n] AND shifted; |
| 5395 | if d == 15 then // Can only occur for ARM encoding |
| 5396 | ALUWritePC(result); // setflags is always FALSE here |
| 5397 | else |
| 5398 | R[d] = result; |
| 5399 | if setflags then |
| 5400 | APSR.N = result<31>; |
| 5401 | APSR.Z = IsZeroBit(result); |
| 5402 | APSR.C = carry; |
| 5403 | // APSR.V unchanged |
| 5404 | #endif |
| 5405 | |
| 5406 | bool success = false; |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5407 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5408 | if (ConditionPassed(opcode)) |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5409 | { |
| 5410 | uint32_t Rd, Rn, Rm; |
| 5411 | ARM_ShifterType shift_t; |
| 5412 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 5413 | bool setflags; |
| 5414 | uint32_t carry; |
| 5415 | switch (encoding) |
| 5416 | { |
| 5417 | case eEncodingT1: |
| 5418 | Rd = Rn = Bits32(opcode, 2, 0); |
| 5419 | Rm = Bits32(opcode, 5, 3); |
| 5420 | setflags = !InITBlock(); |
| 5421 | shift_t = SRType_LSL; |
| 5422 | shift_n = 0; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 5423 | break; |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5424 | case eEncodingT2: |
| 5425 | Rd = Bits32(opcode, 11, 8); |
| 5426 | Rn = Bits32(opcode, 19, 16); |
| 5427 | Rm = Bits32(opcode, 3, 0); |
| 5428 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 5429 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 5430 | // if Rd == '1111' && S == '1' then SEE TST (register); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5431 | if (Rd == 15 && setflags) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5432 | return EmulateTSTReg(opcode, eEncodingT2); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5433 | if (Rd == 13 || (Rd == 15 && !setflags) || BadReg(Rn) || BadReg(Rm)) |
| 5434 | return false; |
| 5435 | break; |
| 5436 | case eEncodingA1: |
| 5437 | Rd = Bits32(opcode, 15, 12); |
| 5438 | Rn = Bits32(opcode, 19, 16); |
| 5439 | Rm = Bits32(opcode, 3, 0); |
| 5440 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 5441 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5442 | |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5443 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5444 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5445 | break; |
| 5446 | default: |
| 5447 | return false; |
| 5448 | } |
| 5449 | |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5450 | // Read the first operand. |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5451 | uint32_t val1 = ReadCoreReg(Rn, &success); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5452 | if (!success) |
| 5453 | return false; |
| 5454 | |
| 5455 | // Read the second operand. |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 5456 | uint32_t val2 = ReadCoreReg(Rm, &success); |
Johnny Chen | e97c0d5 | 2011-02-18 19:32:20 +0000 | [diff] [blame] | 5457 | if (!success) |
| 5458 | return false; |
| 5459 | |
| 5460 | uint32_t shifted = Shift_C(val2, shift_t, shift_n, APSR_C, carry); |
| 5461 | uint32_t result = val1 & shifted; |
| 5462 | |
| 5463 | EmulateInstruction::Context context; |
| 5464 | context.type = EmulateInstruction::eContextImmediate; |
| 5465 | context.SetNoArgs (); |
| 5466 | |
| 5467 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
| 5468 | return false; |
| 5469 | } |
| 5470 | return true; |
| 5471 | } |
| 5472 | |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5473 | // Bitwise Bit Clear (immediate) performs a bitwise AND of a register value and the complement of an |
| 5474 | // immediate value, and writes the result to the destination register. It can optionally update the |
| 5475 | // condition flags based on the result. |
| 5476 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5477 | EmulateInstructionARM::EmulateBICImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5478 | { |
| 5479 | #if 0 |
| 5480 | // ARM pseudo code... |
| 5481 | if ConditionPassed() then |
| 5482 | EncodingSpecificOperations(); |
| 5483 | result = R[n] AND NOT(imm32); |
| 5484 | if d == 15 then // Can only occur for ARM encoding |
| 5485 | ALUWritePC(result); // setflags is always FALSE here |
| 5486 | else |
| 5487 | R[d] = result; |
| 5488 | if setflags then |
| 5489 | APSR.N = result<31>; |
| 5490 | APSR.Z = IsZeroBit(result); |
| 5491 | APSR.C = carry; |
| 5492 | // APSR.V unchanged |
| 5493 | #endif |
| 5494 | |
| 5495 | bool success = false; |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5496 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5497 | if (ConditionPassed(opcode)) |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5498 | { |
| 5499 | uint32_t Rd, Rn; |
| 5500 | uint32_t imm32; // the immediate value to be bitwise inverted and ANDed to the value obtained from Rn |
| 5501 | bool setflags; |
| 5502 | uint32_t carry; // the carry bit after ARM/Thumb Expand operation |
| 5503 | switch (encoding) |
| 5504 | { |
| 5505 | case eEncodingT1: |
| 5506 | Rd = Bits32(opcode, 11, 8); |
| 5507 | Rn = Bits32(opcode, 19, 16); |
| 5508 | setflags = BitIsSet(opcode, 20); |
| 5509 | imm32 = ThumbExpandImm_C(opcode, APSR_C, carry); // (imm32, carry) = ThumbExpandImm(i:imm3:imm8, APSR.C) |
| 5510 | if (BadReg(Rd) || BadReg(Rn)) |
| 5511 | return false; |
| 5512 | break; |
| 5513 | case eEncodingA1: |
| 5514 | Rd = Bits32(opcode, 15, 12); |
| 5515 | Rn = Bits32(opcode, 19, 16); |
| 5516 | setflags = BitIsSet(opcode, 20); |
| 5517 | 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] | 5518 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5519 | // 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] | 5520 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5521 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5522 | break; |
| 5523 | default: |
| 5524 | return false; |
| 5525 | } |
| 5526 | |
| 5527 | // Read the first operand. |
| 5528 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 5529 | if (!success) |
| 5530 | return false; |
| 5531 | |
| 5532 | uint32_t result = val1 & ~imm32; |
| 5533 | |
| 5534 | EmulateInstruction::Context context; |
| 5535 | context.type = EmulateInstruction::eContextImmediate; |
| 5536 | context.SetNoArgs (); |
| 5537 | |
| 5538 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
| 5539 | return false; |
| 5540 | } |
| 5541 | return true; |
| 5542 | } |
| 5543 | |
| 5544 | // Bitwise Bit Clear (register) performs a bitwise AND of a register value and the complement of an |
| 5545 | // optionally-shifted register value, and writes the result to the destination register. |
| 5546 | // It can optionally update the condition flags based on the result. |
| 5547 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5548 | EmulateInstructionARM::EmulateBICReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5549 | { |
| 5550 | #if 0 |
| 5551 | // ARM pseudo code... |
| 5552 | if ConditionPassed() then |
| 5553 | EncodingSpecificOperations(); |
| 5554 | (shifted, carry) = Shift_C(R[m], shift_t, shift_n, APSR.C); |
| 5555 | result = R[n] AND NOT(shifted); |
| 5556 | if d == 15 then // Can only occur for ARM encoding |
| 5557 | ALUWritePC(result); // setflags is always FALSE here |
| 5558 | else |
| 5559 | R[d] = result; |
| 5560 | if setflags then |
| 5561 | APSR.N = result<31>; |
| 5562 | APSR.Z = IsZeroBit(result); |
| 5563 | APSR.C = carry; |
| 5564 | // APSR.V unchanged |
| 5565 | #endif |
| 5566 | |
| 5567 | bool success = false; |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5568 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5569 | if (ConditionPassed(opcode)) |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5570 | { |
| 5571 | uint32_t Rd, Rn, Rm; |
| 5572 | ARM_ShifterType shift_t; |
| 5573 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 5574 | bool setflags; |
| 5575 | uint32_t carry; |
| 5576 | switch (encoding) |
| 5577 | { |
| 5578 | case eEncodingT1: |
| 5579 | Rd = Rn = Bits32(opcode, 2, 0); |
| 5580 | Rm = Bits32(opcode, 5, 3); |
| 5581 | setflags = !InITBlock(); |
| 5582 | shift_t = SRType_LSL; |
| 5583 | shift_n = 0; |
| 5584 | break; |
| 5585 | case eEncodingT2: |
| 5586 | Rd = Bits32(opcode, 11, 8); |
| 5587 | Rn = Bits32(opcode, 19, 16); |
| 5588 | Rm = Bits32(opcode, 3, 0); |
| 5589 | setflags = BitIsSet(opcode, 20); |
| 5590 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
| 5591 | if (BadReg(Rd) || BadReg(Rn) || BadReg(Rm)) |
| 5592 | return false; |
| 5593 | break; |
| 5594 | case eEncodingA1: |
| 5595 | Rd = Bits32(opcode, 15, 12); |
| 5596 | Rn = Bits32(opcode, 19, 16); |
| 5597 | Rm = Bits32(opcode, 3, 0); |
| 5598 | setflags = BitIsSet(opcode, 20); |
| 5599 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5600 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5601 | // 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] | 5602 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 5603 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | b9f02cf | 2011-02-24 01:15:17 +0000 | [diff] [blame] | 5604 | break; |
| 5605 | default: |
| 5606 | return false; |
| 5607 | } |
| 5608 | |
| 5609 | // Read the first operand. |
| 5610 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 5611 | if (!success) |
| 5612 | return false; |
| 5613 | |
| 5614 | // Read the second operand. |
| 5615 | uint32_t val2 = ReadCoreReg(Rm, &success); |
| 5616 | if (!success) |
| 5617 | return false; |
| 5618 | |
| 5619 | uint32_t shifted = Shift_C(val2, shift_t, shift_n, APSR_C, carry); |
| 5620 | uint32_t result = val1 & ~shifted; |
| 5621 | |
| 5622 | EmulateInstruction::Context context; |
| 5623 | context.type = EmulateInstruction::eContextImmediate; |
| 5624 | context.SetNoArgs (); |
| 5625 | |
| 5626 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
| 5627 | return false; |
| 5628 | } |
| 5629 | return true; |
| 5630 | } |
| 5631 | |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5632 | // 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] | 5633 | // 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] | 5634 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5635 | EmulateInstructionARM::EmulateLDRImmediateARM (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5636 | { |
| 5637 | #if 0 |
| 5638 | if ConditionPassed() then |
| 5639 | EncodingSpecificOperations(); |
| 5640 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 5641 | address = if index then offset_addr else R[n]; |
| 5642 | data = MemU[address,4]; |
| 5643 | if wback then R[n] = offset_addr; |
| 5644 | if t == 15 then |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5645 | if address<1:0> == '00' then LoadWritePC(data); else UNPREDICTABLE; |
| 5646 | elsif UnalignedSupport() || address<1:0> = '00' then |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5647 | R[t] = data; |
| 5648 | else // Can only apply before ARMv7 |
| 5649 | R[t] = ROR(data, 8*UInt(address<1:0>)); |
| 5650 | #endif |
| 5651 | |
| 5652 | bool success = false; |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5653 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5654 | if (ConditionPassed(opcode)) |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5655 | { |
| 5656 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 5657 | |
| 5658 | uint32_t t; |
| 5659 | uint32_t n; |
| 5660 | uint32_t imm32; |
| 5661 | bool index; |
| 5662 | bool add; |
| 5663 | bool wback; |
| 5664 | |
| 5665 | switch (encoding) |
| 5666 | { |
| 5667 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5668 | // if Rn == '1111' then SEE LDR (literal); |
| 5669 | // if P == '0' && W == '1' then SEE LDRT; |
| 5670 | // 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] | 5671 | // t == UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 5672 | t = Bits32 (opcode, 15, 12); |
| 5673 | n = Bits32 (opcode, 19, 16); |
| 5674 | imm32 = Bits32 (opcode, 11, 0); |
| 5675 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5676 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
| 5677 | index = BitIsSet (opcode, 24); |
| 5678 | add = BitIsSet (opcode, 23); |
| 5679 | wback = (BitIsClear (opcode, 24) || BitIsSet (opcode, 21)); |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5680 | |
| 5681 | // if wback && n == t then UNPREDICTABLE; |
| 5682 | if (wback && (n == t)) |
| 5683 | return false; |
| 5684 | |
| 5685 | break; |
| 5686 | |
| 5687 | default: |
| 5688 | return false; |
| 5689 | } |
| 5690 | |
| 5691 | addr_t address; |
| 5692 | addr_t offset_addr; |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 5693 | addr_t base_address = ReadCoreReg (n, &success); |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5694 | if (!success) |
| 5695 | return false; |
| 5696 | |
| 5697 | // offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 5698 | if (add) |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 5699 | offset_addr = base_address + imm32; |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5700 | else |
| 5701 | offset_addr = base_address - imm32; |
| 5702 | |
| 5703 | // address = if index then offset_addr else R[n]; |
| 5704 | if (index) |
| 5705 | address = offset_addr; |
| 5706 | else |
| 5707 | address = base_address; |
| 5708 | |
| 5709 | // data = MemU[address,4]; |
| 5710 | |
| 5711 | Register base_reg; |
| 5712 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 5713 | |
| 5714 | EmulateInstruction::Context context; |
| 5715 | context.type = eContextRegisterLoad; |
| 5716 | context.SetRegisterPlusOffset (base_reg, address - base_address); |
| 5717 | |
| 5718 | uint64_t data = MemURead (context, address, addr_byte_size, 0, &success); |
| 5719 | if (!success) |
| 5720 | return false; |
| 5721 | |
| 5722 | // if wback then R[n] = offset_addr; |
| 5723 | if (wback) |
| 5724 | { |
| 5725 | context.type = eContextAdjustBaseRegister; |
| 5726 | context.SetAddress (offset_addr); |
| 5727 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 5728 | return false; |
| 5729 | } |
| 5730 | |
| 5731 | // if t == 15 then |
| 5732 | if (t == 15) |
| 5733 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5734 | // if address<1:0> == '00' then LoadWritePC(data); else UNPREDICTABLE; |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5735 | if (BitIsClear (address, 1) && BitIsClear (address, 0)) |
| 5736 | { |
| 5737 | // LoadWritePC (data); |
| 5738 | context.type = eContextRegisterLoad; |
| 5739 | context.SetRegisterPlusOffset (base_reg, address - base_address); |
| 5740 | LoadWritePC (context, data); |
| 5741 | } |
| 5742 | else |
| 5743 | return false; |
| 5744 | } |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5745 | // elsif UnalignedSupport() || address<1:0> = '00' then |
Caroline Tice | 4d729c5 | 2011-02-18 00:55:53 +0000 | [diff] [blame] | 5746 | else if (UnalignedSupport() || (BitIsClear (address, 1) && BitIsClear (address, 0))) |
| 5747 | { |
| 5748 | // R[t] = data; |
| 5749 | context.type = eContextRegisterLoad; |
| 5750 | context.SetRegisterPlusOffset (base_reg, address - base_address); |
| 5751 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 5752 | return false; |
| 5753 | } |
| 5754 | // else // Can only apply before ARMv7 |
| 5755 | else |
| 5756 | { |
| 5757 | // R[t] = ROR(data, 8*UInt(address<1:0>)); |
| 5758 | data = ROR (data, Bits32 (address, 1, 0)); |
| 5759 | context.type = eContextRegisterLoad; |
| 5760 | context.SetImmediate (data); |
| 5761 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 5762 | return false; |
| 5763 | } |
| 5764 | |
| 5765 | } |
| 5766 | return true; |
| 5767 | } |
| 5768 | |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5769 | // LDR (register) calculates an address from a base register value and an offset register value, loads a word |
| 5770 | // from memory, and writes it to a resgister. The offset register value can optionally be shifted. |
| 5771 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5772 | EmulateInstructionARM::EmulateLDRRegister (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5773 | { |
| 5774 | #if 0 |
| 5775 | if ConditionPassed() then |
| 5776 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 5777 | offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 5778 | offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 5779 | address = if index then offset_addr else R[n]; |
| 5780 | data = MemU[address,4]; |
| 5781 | if wback then R[n] = offset_addr; |
| 5782 | if t == 15 then |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5783 | if address<1:0> == '00' then LoadWritePC(data); else UNPREDICTABLE; |
| 5784 | elsif UnalignedSupport() || address<1:0> = '00' then |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5785 | R[t] = data; |
| 5786 | else // Can only apply before ARMv7 |
| 5787 | if CurrentInstrSet() == InstrSet_ARM then |
| 5788 | R[t] = ROR(data, 8*UInt(address<1:0>)); |
| 5789 | else |
| 5790 | R[t] = bits(32) UNKNOWN; |
| 5791 | #endif |
| 5792 | |
| 5793 | bool success = false; |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5794 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5795 | if (ConditionPassed(opcode)) |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5796 | { |
| 5797 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 5798 | |
| 5799 | uint32_t t; |
| 5800 | uint32_t n; |
| 5801 | uint32_t m; |
| 5802 | bool index; |
| 5803 | bool add; |
| 5804 | bool wback; |
| 5805 | ARM_ShifterType shift_t; |
| 5806 | uint32_t shift_n; |
| 5807 | |
| 5808 | switch (encoding) |
| 5809 | { |
| 5810 | case eEncodingT1: |
| 5811 | // if CurrentInstrSet() == InstrSet_ThumbEE then SEE "Modified operation in ThumbEE"; |
| 5812 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 5813 | t = Bits32 (opcode, 2, 0); |
| 5814 | n = Bits32 (opcode, 5, 3); |
| 5815 | m = Bits32 (opcode, 8, 6); |
| 5816 | |
| 5817 | // index = TRUE; add = TRUE; wback = FALSE; |
| 5818 | index = true; |
| 5819 | add = true; |
| 5820 | wback = false; |
| 5821 | |
| 5822 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 5823 | shift_t = SRType_LSL; |
| 5824 | shift_n = 0; |
| 5825 | |
| 5826 | break; |
| 5827 | |
| 5828 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5829 | // if Rn == '1111' then SEE LDR (literal); |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5830 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 5831 | t = Bits32 (opcode, 15, 12); |
| 5832 | n = Bits32 (opcode, 19, 16); |
| 5833 | m = Bits32 (opcode, 3, 0); |
| 5834 | |
| 5835 | // index = TRUE; add = TRUE; wback = FALSE; |
| 5836 | index = true; |
| 5837 | add = true; |
| 5838 | wback = false; |
| 5839 | |
| 5840 | // (shift_t, shift_n) = (SRType_LSL, UInt(imm2)); |
| 5841 | shift_t = SRType_LSL; |
| 5842 | shift_n = Bits32 (opcode, 5, 4); |
| 5843 | |
| 5844 | // if BadReg(m) then UNPREDICTABLE; |
| 5845 | if (BadReg (m)) |
| 5846 | return false; |
| 5847 | |
| 5848 | // if t == 15 && InITBlock() && !LastInITBlock() then UNPREDICTABLE; |
| 5849 | if ((t == 15) && InITBlock() && !LastInITBlock()) |
| 5850 | return false; |
| 5851 | |
| 5852 | break; |
| 5853 | |
| 5854 | case eEncodingA1: |
| 5855 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5856 | // if P == '0' && W == '1' then SEE LDRT; |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5857 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 5858 | t = Bits32 (opcode, 15, 12); |
| 5859 | n = Bits32 (opcode, 19, 16); |
| 5860 | m = Bits32 (opcode, 3, 0); |
| 5861 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5862 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5863 | index = BitIsSet (opcode, 24); |
| 5864 | add = BitIsSet (opcode, 23); |
| 5865 | wback = (BitIsClear (opcode, 24) || BitIsSet (opcode, 21)); |
| 5866 | |
| 5867 | // (shift_t, shift_n) = DecodeImmShift(type, imm5); |
| 5868 | uint32_t type = Bits32 (opcode, 6, 5); |
| 5869 | uint32_t imm5 = Bits32 (opcode, 11, 7); |
| 5870 | shift_n = DecodeImmShift (type, imm5, shift_t); |
| 5871 | |
| 5872 | // if m == 15 then UNPREDICTABLE; |
| 5873 | if (m == 15) |
| 5874 | return false; |
| 5875 | |
| 5876 | // if wback && (n == 15 || n == t) then UNPREDICTABLE; |
| 5877 | if (wback && ((n == 15) || (n == t))) |
| 5878 | return false; |
| 5879 | } |
| 5880 | break; |
| 5881 | |
| 5882 | |
| 5883 | default: |
| 5884 | return false; |
| 5885 | } |
| 5886 | |
| 5887 | uint32_t Rm = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 5888 | if (!success) |
| 5889 | return false; |
| 5890 | |
| 5891 | uint32_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 5892 | if (!success) |
| 5893 | return false; |
| 5894 | |
| 5895 | addr_t offset_addr; |
| 5896 | addr_t address; |
| 5897 | |
| 5898 | // offset = Shift(R[m], shift_t, shift_n, APSR.C); -- Note "The APSR is an application level alias for the CPSR". |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 5899 | addr_t offset = Shift (Rm, shift_t, shift_n, Bit32 (m_opcode_cpsr, APSR_C)); |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5900 | |
| 5901 | // offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 5902 | if (add) |
| 5903 | offset_addr = Rn + offset; |
| 5904 | else |
| 5905 | offset_addr = Rn - offset; |
| 5906 | |
| 5907 | // address = if index then offset_addr else R[n]; |
| 5908 | if (index) |
| 5909 | address = offset_addr; |
| 5910 | else |
| 5911 | address = Rn; |
| 5912 | |
| 5913 | // data = MemU[address,4]; |
| 5914 | Register base_reg; |
| 5915 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 5916 | |
| 5917 | EmulateInstruction::Context context; |
| 5918 | context.type = eContextRegisterLoad; |
| 5919 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 5920 | |
| 5921 | uint64_t data = MemURead (context, address, addr_byte_size, 0, &success); |
| 5922 | if (!success) |
| 5923 | return false; |
| 5924 | |
| 5925 | // if wback then R[n] = offset_addr; |
| 5926 | if (wback) |
| 5927 | { |
| 5928 | context.type = eContextAdjustBaseRegister; |
| 5929 | context.SetAddress (offset_addr); |
| 5930 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 5931 | return false; |
| 5932 | } |
| 5933 | |
| 5934 | // if t == 15 then |
| 5935 | if (t == 15) |
| 5936 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5937 | // if address<1:0> == '00' then LoadWritePC(data); else UNPREDICTABLE; |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5938 | if (BitIsClear (address, 1) && BitIsClear (address, 0)) |
| 5939 | { |
| 5940 | context.type = eContextRegisterLoad; |
| 5941 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 5942 | LoadWritePC (context, data); |
| 5943 | } |
| 5944 | else |
| 5945 | return false; |
| 5946 | } |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 5947 | // elsif UnalignedSupport() || address<1:0> = '00' then |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 5948 | else if (UnalignedSupport () || (BitIsClear (address, 1) && BitIsClear (address, 0))) |
| 5949 | { |
| 5950 | // R[t] = data; |
| 5951 | context.type = eContextRegisterLoad; |
| 5952 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 5953 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 5954 | return false; |
| 5955 | } |
| 5956 | else // Can only apply before ARMv7 |
| 5957 | { |
| 5958 | // if CurrentInstrSet() == InstrSet_ARM then |
| 5959 | if (CurrentInstrSet () == eModeARM) |
| 5960 | { |
| 5961 | // R[t] = ROR(data, 8*UInt(address<1:0>)); |
| 5962 | data = ROR (data, Bits32 (address, 1, 0)); |
| 5963 | context.type = eContextRegisterLoad; |
| 5964 | context.SetImmediate (data); |
| 5965 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 5966 | return false; |
| 5967 | } |
| 5968 | else |
| 5969 | { |
| 5970 | // R[t] = bits(32) UNKNOWN; |
| 5971 | WriteBits32Unknown (t); |
| 5972 | } |
| 5973 | } |
| 5974 | } |
| 5975 | return true; |
| 5976 | } |
Caroline Tice | 21b604b | 2011-02-18 21:06:04 +0000 | [diff] [blame] | 5977 | |
| 5978 | // LDRB (immediate, Thumb) |
| 5979 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5980 | EmulateInstructionARM::EmulateLDRBImmediate (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 21b604b | 2011-02-18 21:06:04 +0000 | [diff] [blame] | 5981 | { |
| 5982 | #if 0 |
| 5983 | if ConditionPassed() then |
| 5984 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 5985 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 5986 | address = if index then offset_addr else R[n]; |
| 5987 | R[t] = ZeroExtend(MemU[address,1], 32); |
| 5988 | if wback then R[n] = offset_addr; |
| 5989 | #endif |
| 5990 | |
| 5991 | bool success = false; |
Caroline Tice | 21b604b | 2011-02-18 21:06:04 +0000 | [diff] [blame] | 5992 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 5993 | if (ConditionPassed(opcode)) |
Caroline Tice | 21b604b | 2011-02-18 21:06:04 +0000 | [diff] [blame] | 5994 | { |
| 5995 | uint32_t t; |
| 5996 | uint32_t n; |
| 5997 | uint32_t imm32; |
| 5998 | bool index; |
| 5999 | bool add; |
| 6000 | bool wback; |
| 6001 | |
| 6002 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6003 | switch (encoding) |
| 6004 | { |
| 6005 | case eEncodingT1: |
| 6006 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm5, 32); |
| 6007 | t = Bits32 (opcode, 2, 0); |
| 6008 | n = Bits32 (opcode, 5, 3); |
| 6009 | imm32 = Bits32 (opcode, 10, 6); |
| 6010 | |
| 6011 | // index = TRUE; add = TRUE; wback = FALSE; |
| 6012 | index = true; |
| 6013 | add = true; |
| 6014 | wback= false; |
| 6015 | |
| 6016 | break; |
| 6017 | |
| 6018 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6019 | // if Rt == '1111' then SEE PLD; |
| 6020 | // if Rn == '1111' then SEE LDRB (literal); |
Caroline Tice | 21b604b | 2011-02-18 21:06:04 +0000 | [diff] [blame] | 6021 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 6022 | t = Bits32 (opcode, 15, 12); |
| 6023 | n = Bits32 (opcode, 19, 16); |
| 6024 | imm32 = Bits32 (opcode, 11, 0); |
| 6025 | |
| 6026 | // index = TRUE; add = TRUE; wback = FALSE; |
| 6027 | index = true; |
| 6028 | add = true; |
| 6029 | wback = false; |
| 6030 | |
| 6031 | // if t == 13 then UNPREDICTABLE; |
| 6032 | if (t == 13) |
| 6033 | return false; |
| 6034 | |
| 6035 | break; |
| 6036 | |
| 6037 | case eEncodingT3: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6038 | // if Rt == '1111' && P == '1' && U == '0' && W == '0' then SEE PLD; |
| 6039 | // if Rn == '1111' then SEE LDRB (literal); |
| 6040 | // if P == '1' && U == '1' && W == '0' then SEE LDRBT; |
| 6041 | // if P == '0' && W == '0' then UNDEFINED; |
Caroline Tice | 21b604b | 2011-02-18 21:06:04 +0000 | [diff] [blame] | 6042 | if (BitIsClear (opcode, 10) && BitIsClear (opcode, 8)) |
| 6043 | return false; |
| 6044 | |
| 6045 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm8, 32); |
| 6046 | t = Bits32 (opcode, 15, 12); |
| 6047 | n = Bits32 (opcode, 19, 16); |
| 6048 | imm32 = Bits32 (opcode, 7, 0); |
| 6049 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6050 | // index = (P == '1'); add = (U == '1'); wback = (W == '1'); |
Caroline Tice | 21b604b | 2011-02-18 21:06:04 +0000 | [diff] [blame] | 6051 | index = BitIsSet (opcode, 10); |
| 6052 | add = BitIsSet (opcode, 9); |
| 6053 | wback = BitIsSet (opcode, 8); |
| 6054 | |
| 6055 | // if BadReg(t) || (wback && n == t) then UNPREDICTABLE; |
| 6056 | if (BadReg (t) || (wback && (n == t))) |
| 6057 | return false; |
| 6058 | |
| 6059 | break; |
| 6060 | |
| 6061 | default: |
| 6062 | return false; |
| 6063 | } |
| 6064 | |
| 6065 | uint32_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 6066 | if (!success) |
| 6067 | return false; |
| 6068 | |
| 6069 | addr_t address; |
| 6070 | addr_t offset_addr; |
| 6071 | |
| 6072 | // offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 6073 | if (add) |
| 6074 | offset_addr = Rn + imm32; |
| 6075 | else |
| 6076 | offset_addr = Rn - imm32; |
| 6077 | |
| 6078 | // address = if index then offset_addr else R[n]; |
| 6079 | if (index) |
| 6080 | address = offset_addr; |
| 6081 | else |
| 6082 | address = Rn; |
| 6083 | |
| 6084 | // R[t] = ZeroExtend(MemU[address,1], 32); |
| 6085 | Register base_reg; |
| 6086 | Register data_reg; |
| 6087 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 6088 | data_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + t); |
| 6089 | |
| 6090 | EmulateInstruction::Context context; |
| 6091 | context.type = eContextRegisterLoad; |
| 6092 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 6093 | |
| 6094 | uint64_t data = MemURead (context, address, 1, 0, &success); |
| 6095 | if (!success) |
| 6096 | return false; |
| 6097 | |
| 6098 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 6099 | return false; |
| 6100 | |
| 6101 | // if wback then R[n] = offset_addr; |
| 6102 | if (wback) |
| 6103 | { |
| 6104 | context.type = eContextAdjustBaseRegister; |
| 6105 | context.SetAddress (offset_addr); |
| 6106 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 6107 | return false; |
| 6108 | } |
| 6109 | } |
| 6110 | return true; |
| 6111 | } |
Caroline Tice | f55261f | 2011-02-18 22:24:22 +0000 | [diff] [blame] | 6112 | |
| 6113 | // LDRB (literal) calculates an address from the PC value and an immediate offset, loads a byte from memory, |
| 6114 | // zero-extends it to form a 32-bit word and writes it to a register. |
| 6115 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6116 | EmulateInstructionARM::EmulateLDRBLiteral (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | f55261f | 2011-02-18 22:24:22 +0000 | [diff] [blame] | 6117 | { |
| 6118 | #if 0 |
| 6119 | if ConditionPassed() then |
| 6120 | EncodingSpecificOperations(); NullCheckIfThumbEE(15); |
| 6121 | base = Align(PC,4); |
| 6122 | address = if add then (base + imm32) else (base - imm32); |
| 6123 | R[t] = ZeroExtend(MemU[address,1], 32); |
| 6124 | #endif |
| 6125 | |
| 6126 | bool success = false; |
Caroline Tice | f55261f | 2011-02-18 22:24:22 +0000 | [diff] [blame] | 6127 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6128 | if (ConditionPassed(opcode)) |
Caroline Tice | f55261f | 2011-02-18 22:24:22 +0000 | [diff] [blame] | 6129 | { |
| 6130 | uint32_t t; |
| 6131 | uint32_t imm32; |
| 6132 | bool add; |
| 6133 | switch (encoding) |
| 6134 | { |
| 6135 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6136 | // if Rt == '1111' then SEE PLD; |
| 6137 | // t = UInt(Rt); imm32 = ZeroExtend(imm12, 32); add = (U == '1'); |
Caroline Tice | f55261f | 2011-02-18 22:24:22 +0000 | [diff] [blame] | 6138 | t = Bits32 (opcode, 15, 12); |
| 6139 | imm32 = Bits32 (opcode, 11, 0); |
| 6140 | add = BitIsSet (opcode, 23); |
| 6141 | |
| 6142 | // if t == 13 then UNPREDICTABLE; |
| 6143 | if (t == 13) |
| 6144 | return false; |
| 6145 | |
| 6146 | break; |
| 6147 | |
| 6148 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6149 | // t == UInt(Rt); imm32 = ZeroExtend(imm12, 32); add = (U == '1'); |
Caroline Tice | f55261f | 2011-02-18 22:24:22 +0000 | [diff] [blame] | 6150 | t = Bits32 (opcode, 15, 12); |
| 6151 | imm32 = Bits32 (opcode, 11, 0); |
| 6152 | add = BitIsSet (opcode, 23); |
| 6153 | |
| 6154 | // if t == 15 then UNPREDICTABLE; |
| 6155 | if (t == 15) |
| 6156 | return false; |
| 6157 | break; |
| 6158 | |
| 6159 | default: |
| 6160 | return false; |
| 6161 | } |
| 6162 | |
| 6163 | // base = Align(PC,4); |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 6164 | uint32_t pc_val = ReadCoreReg (PC_REG, &success); |
Caroline Tice | f55261f | 2011-02-18 22:24:22 +0000 | [diff] [blame] | 6165 | if (!success) |
| 6166 | return false; |
| 6167 | |
| 6168 | uint32_t base = AlignPC (pc_val); |
| 6169 | |
| 6170 | addr_t address; |
| 6171 | // address = if add then (base + imm32) else (base - imm32); |
| 6172 | if (add) |
| 6173 | address = base + imm32; |
| 6174 | else |
| 6175 | address = base - imm32; |
| 6176 | |
| 6177 | // R[t] = ZeroExtend(MemU[address,1], 32); |
| 6178 | EmulateInstruction::Context context; |
| 6179 | context.type = eContextRelativeBranchImmediate; |
| 6180 | context.SetImmediate (address - base); |
| 6181 | |
| 6182 | uint64_t data = MemURead (context, address, 1, 0, &success); |
| 6183 | if (!success) |
| 6184 | return false; |
| 6185 | |
| 6186 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 6187 | return false; |
| 6188 | } |
| 6189 | return true; |
| 6190 | } |
Caroline Tice | 30fec12 | 2011-02-18 23:52:21 +0000 | [diff] [blame] | 6191 | |
| 6192 | // LDRB (register) calculates an address from a base register value and an offset rigister value, loads a byte from |
| 6193 | // memory, zero-extends it to form a 32-bit word, and writes it to a register. The offset register value can |
| 6194 | // optionally be shifted. |
| 6195 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6196 | EmulateInstructionARM::EmulateLDRBRegister (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 30fec12 | 2011-02-18 23:52:21 +0000 | [diff] [blame] | 6197 | { |
| 6198 | #if 0 |
| 6199 | if ConditionPassed() then |
| 6200 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6201 | offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 6202 | offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 6203 | address = if index then offset_addr else R[n]; |
| 6204 | R[t] = ZeroExtend(MemU[address,1],32); |
| 6205 | if wback then R[n] = offset_addr; |
| 6206 | #endif |
| 6207 | |
| 6208 | bool success = false; |
Caroline Tice | 30fec12 | 2011-02-18 23:52:21 +0000 | [diff] [blame] | 6209 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6210 | if (ConditionPassed(opcode)) |
Caroline Tice | 30fec12 | 2011-02-18 23:52:21 +0000 | [diff] [blame] | 6211 | { |
| 6212 | uint32_t t; |
| 6213 | uint32_t n; |
| 6214 | uint32_t m; |
| 6215 | bool index; |
| 6216 | bool add; |
| 6217 | bool wback; |
| 6218 | ARM_ShifterType shift_t; |
| 6219 | uint32_t shift_n; |
| 6220 | |
| 6221 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6222 | switch (encoding) |
| 6223 | { |
| 6224 | case eEncodingT1: |
| 6225 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 6226 | t = Bits32 (opcode, 2, 0); |
| 6227 | n = Bits32 (opcode, 5, 3); |
| 6228 | m = Bits32 (opcode, 8, 6); |
| 6229 | |
| 6230 | // index = TRUE; add = TRUE; wback = FALSE; |
| 6231 | index = true; |
| 6232 | add = true; |
| 6233 | wback = false; |
| 6234 | |
| 6235 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 6236 | shift_t = SRType_LSL; |
| 6237 | shift_n = 0; |
| 6238 | break; |
| 6239 | |
| 6240 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6241 | // if Rt == '1111' then SEE PLD; |
| 6242 | // if Rn == '1111' then SEE LDRB (literal); |
Caroline Tice | 30fec12 | 2011-02-18 23:52:21 +0000 | [diff] [blame] | 6243 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 6244 | t = Bits32 (opcode, 15, 12); |
| 6245 | n = Bits32 (opcode, 19, 16); |
| 6246 | m = Bits32 (opcode, 3, 0); |
| 6247 | |
| 6248 | // index = TRUE; add = TRUE; wback = FALSE; |
| 6249 | index = true; |
| 6250 | add = true; |
| 6251 | wback = false; |
| 6252 | |
| 6253 | // (shift_t, shift_n) = (SRType_LSL, UInt(imm2)); |
| 6254 | shift_t = SRType_LSL; |
| 6255 | shift_n = Bits32 (opcode, 5, 4); |
| 6256 | |
| 6257 | // if t == 13 || BadReg(m) then UNPREDICTABLE; |
| 6258 | if ((t == 13) || BadReg (m)) |
| 6259 | return false; |
| 6260 | break; |
| 6261 | |
| 6262 | case eEncodingA1: |
| 6263 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6264 | // if P == '0' && W == '1' then SEE LDRBT; |
Caroline Tice | 30fec12 | 2011-02-18 23:52:21 +0000 | [diff] [blame] | 6265 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 6266 | t = Bits32 (opcode, 15, 12); |
| 6267 | n = Bits32 (opcode, 19, 16); |
| 6268 | m = Bits32 (opcode, 3, 0); |
| 6269 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6270 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
Caroline Tice | 30fec12 | 2011-02-18 23:52:21 +0000 | [diff] [blame] | 6271 | index = BitIsSet (opcode, 24); |
| 6272 | add = BitIsSet (opcode, 23); |
| 6273 | wback = (BitIsClear (opcode, 24) || BitIsSet (opcode, 21)); |
| 6274 | |
| 6275 | // (shift_t, shift_n) = DecodeImmShift(type, imm5); |
| 6276 | uint32_t type = Bits32 (opcode, 6, 5); |
| 6277 | uint32_t imm5 = Bits32 (opcode, 11, 7); |
| 6278 | shift_n = DecodeImmShift (type, imm5, shift_t); |
| 6279 | |
| 6280 | // if t == 15 || m == 15 then UNPREDICTABLE; |
| 6281 | if ((t == 15) || (m == 15)) |
| 6282 | return false; |
| 6283 | |
| 6284 | // if wback && (n == 15 || n == t) then UNPREDICTABLE; |
| 6285 | if (wback && ((n == 15) || (n == t))) |
| 6286 | return false; |
| 6287 | } |
| 6288 | break; |
| 6289 | |
| 6290 | default: |
| 6291 | return false; |
| 6292 | } |
| 6293 | |
| 6294 | addr_t offset_addr; |
| 6295 | addr_t address; |
| 6296 | |
| 6297 | // offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 6298 | uint32_t Rm = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 6299 | if (!success) |
| 6300 | return false; |
| 6301 | |
| 6302 | addr_t offset = Shift (Rm, shift_t, shift_n, APSR_C); |
| 6303 | |
| 6304 | // offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 6305 | uint32_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 6306 | if (!success) |
| 6307 | return false; |
| 6308 | |
| 6309 | if (add) |
| 6310 | offset_addr = Rn + offset; |
| 6311 | else |
| 6312 | offset_addr = Rn - offset; |
| 6313 | |
| 6314 | // address = if index then offset_addr else R[n]; |
| 6315 | if (index) |
| 6316 | address = offset_addr; |
| 6317 | else |
| 6318 | address = Rn; |
| 6319 | |
| 6320 | // R[t] = ZeroExtend(MemU[address,1],32); |
| 6321 | Register base_reg; |
| 6322 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 6323 | |
| 6324 | EmulateInstruction::Context context; |
| 6325 | context.type = eContextRegisterLoad; |
| 6326 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 6327 | |
| 6328 | uint64_t data = MemURead (context, address, 1, 0, &success); |
| 6329 | if (!success) |
| 6330 | return false; |
| 6331 | |
| 6332 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 6333 | return false; |
| 6334 | |
| 6335 | // if wback then R[n] = offset_addr; |
| 6336 | if (wback) |
| 6337 | { |
| 6338 | context.type = eContextAdjustBaseRegister; |
| 6339 | context.SetAddress (offset_addr); |
| 6340 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 6341 | return false; |
| 6342 | } |
| 6343 | } |
| 6344 | return true; |
| 6345 | } |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6346 | |
| 6347 | // LDRH (immediate, Thumb) calculates an address from a base register value and an immediate offset, loads a |
| 6348 | // halfword from memory, zero-extends it to form a 32-bit word, and writes it to a register. It can use offset, |
| 6349 | // post-indexed, or pre-indexed addressing. |
| 6350 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6351 | EmulateInstructionARM::EmulateLDRHImmediate (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6352 | { |
| 6353 | #if 0 |
| 6354 | if ConditionPassed() then |
| 6355 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6356 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 6357 | address = if index then offset_addr else R[n]; |
| 6358 | data = MemU[address,2]; |
| 6359 | if wback then R[n] = offset_addr; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6360 | if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6361 | R[t] = ZeroExtend(data, 32); |
| 6362 | else // Can only apply before ARMv7 |
| 6363 | R[t] = bits(32) UNKNOWN; |
| 6364 | #endif |
| 6365 | |
| 6366 | |
| 6367 | bool success = false; |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6368 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6369 | if (ConditionPassed(opcode)) |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6370 | { |
| 6371 | uint32_t t; |
| 6372 | uint32_t n; |
| 6373 | uint32_t imm32; |
| 6374 | bool index; |
| 6375 | bool add; |
| 6376 | bool wback; |
| 6377 | |
| 6378 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6379 | switch (encoding) |
| 6380 | { |
| 6381 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6382 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm5:'0', 32); |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6383 | t = Bits32 (opcode, 2, 0); |
| 6384 | n = Bits32 (opcode, 5, 3); |
| 6385 | imm32 = Bits32 (opcode, 10, 6) << 1; |
| 6386 | |
| 6387 | // index = TRUE; add = TRUE; wback = FALSE; |
| 6388 | index = true; |
| 6389 | add = true; |
| 6390 | wback = false; |
| 6391 | |
| 6392 | break; |
| 6393 | |
| 6394 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6395 | // if Rt == '1111' then SEE "Unallocated memory hints"; |
| 6396 | // if Rn == '1111' then SEE LDRH (literal); |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6397 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 6398 | t = Bits32 (opcode, 15, 12); |
| 6399 | n = Bits32 (opcode, 19, 16); |
| 6400 | imm32 = Bits32 (opcode, 11, 0); |
| 6401 | |
| 6402 | // index = TRUE; add = TRUE; wback = FALSE; |
| 6403 | index = true; |
| 6404 | add = true; |
| 6405 | wback = false; |
| 6406 | |
| 6407 | // if t == 13 then UNPREDICTABLE; |
| 6408 | if (t == 13) |
| 6409 | return false; |
| 6410 | break; |
| 6411 | |
| 6412 | case eEncodingT3: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6413 | // if Rn == '1111' then SEE LDRH (literal); |
| 6414 | // if Rt == '1111' && P == '1' && U == '0' && W == '0' then SEE "Unallocated memory hints"; |
| 6415 | // if P == '1' && U == '1' && W == '0' then SEE LDRHT; |
| 6416 | // if P == '0' && W == '0' then UNDEFINED; |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6417 | if (BitIsClear (opcode, 10) && BitIsClear (opcode, 8)) |
| 6418 | return false; |
| 6419 | |
| 6420 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm8, 32); |
| 6421 | t = Bits32 (opcode, 15, 12); |
| 6422 | n = Bits32 (opcode, 19, 16); |
| 6423 | imm32 = Bits32 (opcode, 7, 0); |
| 6424 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6425 | // index = (P == '1'); add = (U == '1'); wback = (W == '1'); |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6426 | index = BitIsSet (opcode, 10); |
| 6427 | add = BitIsSet (opcode, 9); |
| 6428 | wback = BitIsSet (opcode, 8); |
| 6429 | |
| 6430 | // if BadReg(t) || (wback && n == t) then UNPREDICTABLE; |
| 6431 | if (BadReg (t) || (wback && (n == t))) |
| 6432 | return false; |
| 6433 | break; |
| 6434 | |
| 6435 | default: |
| 6436 | return false; |
| 6437 | } |
| 6438 | |
| 6439 | // offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 6440 | uint32_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 6441 | if (!success) |
| 6442 | return false; |
| 6443 | |
| 6444 | addr_t offset_addr; |
| 6445 | addr_t address; |
| 6446 | |
| 6447 | if (add) |
| 6448 | offset_addr = Rn + imm32; |
| 6449 | else |
| 6450 | offset_addr = Rn - imm32; |
| 6451 | |
| 6452 | // address = if index then offset_addr else R[n]; |
| 6453 | if (index) |
| 6454 | address = offset_addr; |
| 6455 | else |
| 6456 | address = Rn; |
| 6457 | |
| 6458 | // data = MemU[address,2]; |
| 6459 | Register base_reg; |
| 6460 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 6461 | |
| 6462 | EmulateInstruction::Context context; |
| 6463 | context.type = eContextRegisterLoad; |
| 6464 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 6465 | |
| 6466 | uint64_t data = MemURead (context, address, 2, 0, &success); |
| 6467 | if (!success) |
| 6468 | return false; |
| 6469 | |
| 6470 | // if wback then R[n] = offset_addr; |
| 6471 | if (wback) |
| 6472 | { |
| 6473 | context.type = eContextAdjustBaseRegister; |
| 6474 | context.SetAddress (offset_addr); |
| 6475 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 6476 | return false; |
| 6477 | } |
| 6478 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6479 | // if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 0491b3b | 2011-02-28 22:39:58 +0000 | [diff] [blame] | 6480 | if (UnalignedSupport () || BitIsClear (address, 0)) |
| 6481 | { |
| 6482 | // R[t] = ZeroExtend(data, 32); |
| 6483 | context.type = eContextRegisterLoad; |
| 6484 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 6485 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 6486 | return false; |
| 6487 | } |
| 6488 | else // Can only apply before ARMv7 |
| 6489 | { |
| 6490 | // R[t] = bits(32) UNKNOWN; |
| 6491 | WriteBits32Unknown (t); |
| 6492 | } |
| 6493 | } |
| 6494 | return true; |
| 6495 | } |
Caroline Tice | fe47911 | 2011-02-18 18:52:37 +0000 | [diff] [blame] | 6496 | |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6497 | // LDRH (literal) caculates an address from the PC value and an immediate offset, loads a halfword from memory, |
| 6498 | // zero-extends it to form a 32-bit word, and writes it to a register. |
| 6499 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6500 | EmulateInstructionARM::EmulateLDRHLiteral (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6501 | { |
| 6502 | #if 0 |
| 6503 | if ConditionPassed() then |
| 6504 | EncodingSpecificOperations(); NullCheckIfThumbEE(15); |
| 6505 | base = Align(PC,4); |
| 6506 | address = if add then (base + imm32) else (base - imm32); |
| 6507 | data = MemU[address,2]; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6508 | if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6509 | R[t] = ZeroExtend(data, 32); |
| 6510 | else // Can only apply before ARMv7 |
| 6511 | R[t] = bits(32) UNKNOWN; |
| 6512 | #endif |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6513 | |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6514 | bool success = false; |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6515 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6516 | if (ConditionPassed(opcode)) |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6517 | { |
| 6518 | uint32_t t; |
| 6519 | uint32_t imm32; |
| 6520 | bool add; |
| 6521 | |
| 6522 | // EncodingSpecificOperations(); NullCheckIfThumbEE(15); |
| 6523 | switch (encoding) |
| 6524 | { |
| 6525 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6526 | // if Rt == '1111' then SEE "Unallocated memory hints"; |
| 6527 | // t = UInt(Rt); imm32 = ZeroExtend(imm12, 32); add = (U == '1'); |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6528 | t = Bits32 (opcode, 15, 12); |
| 6529 | imm32 = Bits32 (opcode, 11, 0); |
| 6530 | add = BitIsSet (opcode, 23); |
| 6531 | |
| 6532 | // if t == 13 then UNPREDICTABLE; |
| 6533 | if (t == 13) |
| 6534 | return false; |
| 6535 | |
| 6536 | break; |
| 6537 | |
| 6538 | case eEncodingA1: |
| 6539 | { |
| 6540 | uint32_t imm4H = Bits32 (opcode, 11, 8); |
| 6541 | uint32_t imm4L = Bits32 (opcode, 3, 0); |
| 6542 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6543 | // t == UInt(Rt); imm32 = ZeroExtend(imm4H:imm4L, 32); add = (U == '1'); |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6544 | t = Bits32 (opcode, 15, 12); |
Caroline Tice | 40b1a6c | 2011-03-03 00:07:02 +0000 | [diff] [blame] | 6545 | imm32 = (imm4H << 4) | imm4L; |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6546 | add = BitIsSet (opcode, 23); |
| 6547 | |
| 6548 | // if t == 15 then UNPREDICTABLE; |
| 6549 | if (t == 15) |
| 6550 | return false; |
| 6551 | break; |
| 6552 | } |
| 6553 | |
| 6554 | default: |
| 6555 | return false; |
| 6556 | } |
| 6557 | |
| 6558 | // base = Align(PC,4); |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 6559 | uint64_t pc_value = ReadCoreReg (PC_REG, &success); |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6560 | if (!success) |
| 6561 | return false; |
| 6562 | |
| 6563 | addr_t base = AlignPC (pc_value); |
| 6564 | addr_t address; |
| 6565 | |
| 6566 | // address = if add then (base + imm32) else (base - imm32); |
| 6567 | if (add) |
| 6568 | address = base + imm32; |
| 6569 | else |
| 6570 | address = base - imm32; |
| 6571 | |
| 6572 | // data = MemU[address,2]; |
| 6573 | Register base_reg; |
| 6574 | base_reg.SetRegister (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC); |
| 6575 | |
| 6576 | EmulateInstruction::Context context; |
| 6577 | context.type = eContextRegisterLoad; |
| 6578 | context.SetRegisterPlusOffset (base_reg, address - base); |
| 6579 | |
| 6580 | uint64_t data = MemURead (context, address, 2, 0, &success); |
| 6581 | if (!success) |
| 6582 | return false; |
| 6583 | |
| 6584 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6585 | // if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 952b538 | 2011-02-28 23:15:24 +0000 | [diff] [blame] | 6586 | if (UnalignedSupport () || BitIsClear (address, 0)) |
| 6587 | { |
| 6588 | // R[t] = ZeroExtend(data, 32); |
| 6589 | context.type = eContextRegisterLoad; |
| 6590 | context.SetRegisterPlusOffset (base_reg, address - base); |
| 6591 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 6592 | return false; |
| 6593 | |
| 6594 | } |
| 6595 | else // Can only apply before ARMv7 |
| 6596 | { |
| 6597 | // R[t] = bits(32) UNKNOWN; |
| 6598 | WriteBits32Unknown (t); |
| 6599 | } |
| 6600 | } |
| 6601 | return true; |
| 6602 | } |
| 6603 | |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6604 | // LDRH (literal) calculates an address from a base register value and an offset register value, loads a halfword |
| 6605 | // from memory, zero-extends it to form a 32-bit word, and writes it to a register. The offset register value can |
| 6606 | // be shifted left by 0, 1, 2, or 3 bits. |
| 6607 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6608 | EmulateInstructionARM::EmulateLDRHRegister (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6609 | { |
| 6610 | #if 0 |
| 6611 | if ConditionPassed() then |
| 6612 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6613 | offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 6614 | offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 6615 | address = if index then offset_addr else R[n]; |
| 6616 | data = MemU[address,2]; |
| 6617 | if wback then R[n] = offset_addr; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6618 | if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6619 | R[t] = ZeroExtend(data, 32); |
| 6620 | else // Can only apply before ARMv7 |
| 6621 | R[t] = bits(32) UNKNOWN; |
| 6622 | #endif |
| 6623 | |
| 6624 | bool success = false; |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6625 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6626 | if (ConditionPassed(opcode)) |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6627 | { |
| 6628 | uint32_t t; |
| 6629 | uint32_t n; |
| 6630 | uint32_t m; |
| 6631 | bool index; |
| 6632 | bool add; |
| 6633 | bool wback; |
| 6634 | ARM_ShifterType shift_t; |
| 6635 | uint32_t shift_n; |
| 6636 | |
| 6637 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6638 | switch (encoding) |
| 6639 | { |
| 6640 | case eEncodingT1: |
| 6641 | // if CurrentInstrSet() == InstrSet_ThumbEE then SEE "Modified operation in ThumbEE"; |
| 6642 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 6643 | t = Bits32 (opcode, 2, 0); |
| 6644 | n = Bits32 (opcode, 5, 3); |
| 6645 | m = Bits32 (opcode, 8, 6); |
| 6646 | |
| 6647 | // index = TRUE; add = TRUE; wback = FALSE; |
| 6648 | index = true; |
| 6649 | add = true; |
| 6650 | wback = false; |
| 6651 | |
| 6652 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 6653 | shift_t = SRType_LSL; |
| 6654 | shift_n = 0; |
| 6655 | |
| 6656 | break; |
| 6657 | |
| 6658 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6659 | // if Rn == '1111' then SEE LDRH (literal); |
| 6660 | // if Rt == '1111' then SEE "Unallocated memory hints"; |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6661 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 6662 | t = Bits32 (opcode, 15, 12); |
| 6663 | n = Bits32 (opcode, 19, 16); |
| 6664 | m = Bits32 (opcode, 3, 0); |
| 6665 | |
| 6666 | // index = TRUE; add = TRUE; wback = FALSE; |
| 6667 | index = true; |
| 6668 | add = true; |
| 6669 | wback = false; |
| 6670 | |
| 6671 | // (shift_t, shift_n) = (SRType_LSL, UInt(imm2)); |
| 6672 | shift_t = SRType_LSL; |
| 6673 | shift_n = Bits32 (opcode, 5, 4); |
| 6674 | |
| 6675 | // if t == 13 || BadReg(m) then UNPREDICTABLE; |
| 6676 | if ((t == 13) || BadReg (m)) |
| 6677 | return false; |
| 6678 | break; |
| 6679 | |
| 6680 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6681 | // if P == '0' && W == '1' then SEE LDRHT; |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6682 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 6683 | t = Bits32 (opcode, 15, 12); |
| 6684 | n = Bits32 (opcode, 19, 16); |
| 6685 | m = Bits32 (opcode, 3, 0); |
| 6686 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6687 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6688 | index = BitIsSet (opcode, 24); |
| 6689 | add = BitIsSet (opcode, 23); |
| 6690 | wback = (BitIsClear (opcode, 24) || BitIsSet (opcode, 21)); |
| 6691 | |
| 6692 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 6693 | shift_t = SRType_LSL; |
| 6694 | shift_n = 0; |
| 6695 | |
| 6696 | // if t == 15 || m == 15 then UNPREDICTABLE; |
| 6697 | if ((t == 15) || (m == 15)) |
| 6698 | return false; |
| 6699 | |
| 6700 | // if wback && (n == 15 || n == t) then UNPREDICTABLE; |
| 6701 | if (wback && ((n == 15) || (n == t))) |
| 6702 | return false; |
| 6703 | |
| 6704 | break; |
| 6705 | |
| 6706 | default: |
| 6707 | return false; |
| 6708 | } |
| 6709 | |
| 6710 | // offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 6711 | |
| 6712 | uint64_t Rm = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 6713 | if (!success) |
| 6714 | return false; |
| 6715 | |
| 6716 | addr_t offset = Shift (Rm, shift_t, shift_n, APSR_C); |
| 6717 | |
| 6718 | addr_t offset_addr; |
| 6719 | addr_t address; |
| 6720 | |
| 6721 | // offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 6722 | uint64_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 6723 | if (!success) |
| 6724 | return false; |
| 6725 | |
| 6726 | if (add) |
| 6727 | offset_addr = Rn + offset; |
| 6728 | else |
| 6729 | offset_addr = Rn - offset; |
| 6730 | |
| 6731 | // address = if index then offset_addr else R[n]; |
| 6732 | if (index) |
| 6733 | address = offset_addr; |
| 6734 | else |
| 6735 | address = Rn; |
| 6736 | |
| 6737 | // data = MemU[address,2]; |
| 6738 | Register base_reg; |
| 6739 | Register offset_reg; |
| 6740 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 6741 | offset_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + m); |
| 6742 | |
| 6743 | EmulateInstruction::Context context; |
| 6744 | context.type = eContextRegisterLoad; |
| 6745 | context.SetRegisterPlusIndirectOffset (base_reg, offset_reg); |
| 6746 | uint64_t data = MemURead (context, address, 2, 0, &success); |
| 6747 | if (!success) |
| 6748 | return false; |
| 6749 | |
| 6750 | // if wback then R[n] = offset_addr; |
| 6751 | if (wback) |
| 6752 | { |
| 6753 | context.type = eContextAdjustBaseRegister; |
| 6754 | context.SetAddress (offset_addr); |
| 6755 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 6756 | return false; |
| 6757 | } |
| 6758 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6759 | // if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6760 | if (UnalignedSupport() || BitIsClear (address, 0)) |
| 6761 | { |
| 6762 | // R[t] = ZeroExtend(data, 32); |
| 6763 | context.type = eContextRegisterLoad; |
| 6764 | context.SetRegisterPlusIndirectOffset (base_reg, offset_reg); |
| 6765 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 6766 | return false; |
| 6767 | } |
| 6768 | else // Can only apply before ARMv7 |
| 6769 | { |
| 6770 | // R[t] = bits(32) UNKNOWN; |
| 6771 | WriteBits32Unknown (t); |
| 6772 | } |
| 6773 | } |
| 6774 | return true; |
| 6775 | } |
| 6776 | |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6777 | // LDRSB (immediate) calculates an address from a base register value and an immediate offset, loads a byte from |
| 6778 | // memory, sign-extends it to form a 32-bit word, and writes it to a register. It can use offset, post-indexed, |
| 6779 | // or pre-indexed addressing. |
| 6780 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6781 | EmulateInstructionARM::EmulateLDRSBImmediate (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6782 | { |
| 6783 | #if 0 |
| 6784 | if ConditionPassed() then |
| 6785 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6786 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 6787 | address = if index then offset_addr else R[n]; |
| 6788 | R[t] = SignExtend(MemU[address,1], 32); |
| 6789 | if wback then R[n] = offset_addr; |
| 6790 | #endif |
| 6791 | |
| 6792 | bool success = false; |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6793 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6794 | if (ConditionPassed(opcode)) |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6795 | { |
| 6796 | uint32_t t; |
| 6797 | uint32_t n; |
| 6798 | uint32_t imm32; |
| 6799 | bool index; |
| 6800 | bool add; |
| 6801 | bool wback; |
| 6802 | |
| 6803 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 6804 | switch (encoding) |
| 6805 | { |
| 6806 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6807 | // if Rt == '1111' then SEE PLI; |
| 6808 | // if Rn == '1111' then SEE LDRSB (literal); |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6809 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 6810 | t = Bits32 (opcode, 15, 12); |
| 6811 | n = Bits32 (opcode, 19, 16); |
| 6812 | imm32 = Bits32 (opcode, 11, 0); |
| 6813 | |
| 6814 | // index = TRUE; add = TRUE; wback = FALSE; |
| 6815 | index = true; |
| 6816 | add = true; |
| 6817 | wback = false; |
| 6818 | |
| 6819 | // if t == 13 then UNPREDICTABLE; |
| 6820 | if (t == 13) |
| 6821 | return false; |
| 6822 | |
| 6823 | break; |
| 6824 | |
| 6825 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6826 | // if Rt == '1111' && P == '1' && U == '0' && W == '0' then SEE PLI; |
| 6827 | // if Rn == '1111' then SEE LDRSB (literal); |
| 6828 | // if P == '1' && U == '1' && W == '0' then SEE LDRSBT; |
| 6829 | // if P == '0' && W == '0' then UNDEFINED; |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6830 | if (BitIsClear (opcode, 10) && BitIsClear (opcode, 8)) |
| 6831 | return false; |
| 6832 | |
| 6833 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm8, 32); |
| 6834 | t = Bits32 (opcode, 15, 12); |
| 6835 | n = Bits32 (opcode, 19, 16); |
| 6836 | imm32 = Bits32 (opcode, 7, 0); |
| 6837 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6838 | // index = (P == '1'); add = (U == '1'); wback = (W == '1'); |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6839 | index = BitIsSet (opcode, 10); |
| 6840 | add = BitIsSet (opcode, 9); |
| 6841 | wback = BitIsSet (opcode, 8); |
| 6842 | |
| 6843 | // if BadReg(t) || (wback && n == t) then UNPREDICTABLE; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6844 | if (((t == 13) || ((t == 15) |
| 6845 | && (BitIsClear (opcode, 10) || BitIsSet (opcode, 9) || BitIsSet (opcode, 8)))) |
| 6846 | || (wback && (n == t))) |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6847 | return false; |
| 6848 | |
| 6849 | break; |
| 6850 | |
| 6851 | case eEncodingA1: |
| 6852 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6853 | // if Rn == '1111' then SEE LDRSB (literal); |
| 6854 | // if P == '0' && W == '1' then SEE LDRSBT; |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6855 | // t == UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm4H:imm4L, 32); |
| 6856 | t = Bits32 (opcode, 15, 12); |
| 6857 | n = Bits32 (opcode, 19, 16); |
| 6858 | |
| 6859 | uint32_t imm4H = Bits32 (opcode, 11, 8); |
| 6860 | uint32_t imm4L = Bits32 (opcode, 3, 0); |
Caroline Tice | 40b1a6c | 2011-03-03 00:07:02 +0000 | [diff] [blame] | 6861 | imm32 = (imm4H << 4) | imm4L; |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6862 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6863 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6864 | index = BitIsSet (opcode, 24); |
| 6865 | add = BitIsSet (opcode, 23); |
| 6866 | wback = (BitIsClear (opcode, 24) || BitIsSet (opcode, 21)); |
| 6867 | |
| 6868 | // if t == 15 || (wback && n == t) then UNPREDICTABLE; |
| 6869 | if ((t == 15) || (wback && (n == t))) |
| 6870 | return false; |
| 6871 | |
| 6872 | break; |
| 6873 | } |
| 6874 | |
| 6875 | default: |
| 6876 | return false; |
| 6877 | } |
| 6878 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6879 | uint64_t Rn = ReadCoreReg (n, &success); |
Caroline Tice | a5e28af | 2011-03-01 21:53:03 +0000 | [diff] [blame] | 6880 | if (!success) |
| 6881 | return false; |
| 6882 | |
| 6883 | addr_t offset_addr; |
| 6884 | addr_t address; |
| 6885 | |
| 6886 | // offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 6887 | if (add) |
| 6888 | offset_addr = Rn + imm32; |
| 6889 | else |
| 6890 | offset_addr = Rn - imm32; |
| 6891 | |
| 6892 | // address = if index then offset_addr else R[n]; |
| 6893 | if (index) |
| 6894 | address = offset_addr; |
| 6895 | else |
| 6896 | address = Rn; |
| 6897 | |
| 6898 | // R[t] = SignExtend(MemU[address,1], 32); |
| 6899 | Register base_reg; |
| 6900 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 6901 | |
| 6902 | EmulateInstruction::Context context; |
| 6903 | context.type = eContextRegisterLoad; |
| 6904 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 6905 | |
| 6906 | uint64_t unsigned_data = MemURead (context, address, 1, 0, &success); |
| 6907 | if (!success) |
| 6908 | return false; |
| 6909 | |
| 6910 | int64_t signed_data = llvm::SignExtend64<8>(unsigned_data); |
| 6911 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, (uint64_t) signed_data)) |
| 6912 | return false; |
| 6913 | |
| 6914 | // if wback then R[n] = offset_addr; |
| 6915 | if (wback) |
| 6916 | { |
| 6917 | context.type = eContextAdjustBaseRegister; |
| 6918 | context.SetAddress (offset_addr); |
| 6919 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 6920 | return false; |
| 6921 | } |
| 6922 | } |
| 6923 | |
| 6924 | return true; |
| 6925 | } |
Caroline Tice | 0e6bc95 | 2011-03-01 18:00:42 +0000 | [diff] [blame] | 6926 | |
Caroline Tice | 5f59391 | 2011-03-01 22:25:17 +0000 | [diff] [blame] | 6927 | // LDRSB (literal) calculates an address from the PC value and an immediate offset, loads a byte from memory, |
| 6928 | // sign-extends it to form a 32-bit word, and writes tit to a register. |
| 6929 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6930 | EmulateInstructionARM::EmulateLDRSBLiteral (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 5f59391 | 2011-03-01 22:25:17 +0000 | [diff] [blame] | 6931 | { |
| 6932 | #if 0 |
| 6933 | if ConditionPassed() then |
| 6934 | EncodingSpecificOperations(); NullCheckIfThumbEE(15); |
| 6935 | base = Align(PC,4); |
| 6936 | address = if add then (base + imm32) else (base - imm32); |
| 6937 | R[t] = SignExtend(MemU[address,1], 32); |
| 6938 | #endif |
| 6939 | |
| 6940 | bool success = false; |
Caroline Tice | 5f59391 | 2011-03-01 22:25:17 +0000 | [diff] [blame] | 6941 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 6942 | if (ConditionPassed(opcode)) |
Caroline Tice | 5f59391 | 2011-03-01 22:25:17 +0000 | [diff] [blame] | 6943 | { |
| 6944 | uint32_t t; |
| 6945 | uint32_t imm32; |
| 6946 | bool add; |
| 6947 | |
| 6948 | // EncodingSpecificOperations(); NullCheckIfThumbEE(15); |
| 6949 | switch (encoding) |
| 6950 | { |
| 6951 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6952 | // if Rt == '1111' then SEE PLI; |
| 6953 | // t = UInt(Rt); imm32 = ZeroExtend(imm12, 32); add = (U == '1'); |
Caroline Tice | 5f59391 | 2011-03-01 22:25:17 +0000 | [diff] [blame] | 6954 | t = Bits32 (opcode, 15, 12); |
| 6955 | imm32 = Bits32 (opcode, 11, 0); |
| 6956 | add = BitIsSet (opcode, 23); |
| 6957 | |
| 6958 | // if t == 13 then UNPREDICTABLE; |
| 6959 | if (t == 13) |
| 6960 | return false; |
| 6961 | |
| 6962 | break; |
| 6963 | |
| 6964 | case eEncodingA1: |
| 6965 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 6966 | // t == UInt(Rt); imm32 = ZeroExtend(imm4H:imm4L, 32); add = (U == '1'); |
Caroline Tice | 5f59391 | 2011-03-01 22:25:17 +0000 | [diff] [blame] | 6967 | t = Bits32 (opcode, 15, 12); |
| 6968 | uint32_t imm4H = Bits32 (opcode, 11, 8); |
| 6969 | uint32_t imm4L = Bits32 (opcode, 3, 0); |
Caroline Tice | 40b1a6c | 2011-03-03 00:07:02 +0000 | [diff] [blame] | 6970 | imm32 = (imm4H << 4) | imm4L; |
Caroline Tice | 5f59391 | 2011-03-01 22:25:17 +0000 | [diff] [blame] | 6971 | add = BitIsSet (opcode, 23); |
| 6972 | |
| 6973 | // if t == 15 then UNPREDICTABLE; |
| 6974 | if (t == 15) |
| 6975 | return false; |
| 6976 | |
| 6977 | break; |
| 6978 | } |
| 6979 | |
| 6980 | default: |
| 6981 | return false; |
| 6982 | } |
| 6983 | |
| 6984 | // base = Align(PC,4); |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 6985 | uint64_t pc_value = ReadCoreReg (PC_REG, &success); |
Caroline Tice | 5f59391 | 2011-03-01 22:25:17 +0000 | [diff] [blame] | 6986 | if (!success) |
| 6987 | return false; |
| 6988 | uint64_t base = AlignPC (pc_value); |
| 6989 | |
| 6990 | // address = if add then (base + imm32) else (base - imm32); |
| 6991 | addr_t address; |
| 6992 | if (add) |
| 6993 | address = base + imm32; |
| 6994 | else |
| 6995 | address = base - imm32; |
| 6996 | |
| 6997 | // R[t] = SignExtend(MemU[address,1], 32); |
| 6998 | Register base_reg; |
| 6999 | base_reg.SetRegister (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC); |
| 7000 | |
| 7001 | EmulateInstruction::Context context; |
| 7002 | context.type = eContextRegisterLoad; |
| 7003 | context.SetRegisterPlusOffset (base_reg, address - base); |
| 7004 | |
| 7005 | uint64_t unsigned_data = MemURead (context, address, 1, 0, &success); |
| 7006 | if (!success) |
| 7007 | return false; |
| 7008 | |
| 7009 | int64_t signed_data = llvm::SignExtend64<8>(unsigned_data); |
| 7010 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, (uint64_t) signed_data)) |
| 7011 | return false; |
| 7012 | } |
| 7013 | return true; |
| 7014 | } |
| 7015 | |
Caroline Tice | 672f311 | 2011-03-01 23:55:59 +0000 | [diff] [blame] | 7016 | // LDRSB (register) calculates an address from a base register value and an offset register value, loadsa byte from |
| 7017 | // memory, sign-extends it to form a 32-bit word, and writes it to a register. The offset register value can be |
| 7018 | // shifted left by 0, 1, 2, or 3 bits. |
| 7019 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7020 | EmulateInstructionARM::EmulateLDRSBRegister (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 672f311 | 2011-03-01 23:55:59 +0000 | [diff] [blame] | 7021 | { |
| 7022 | #if 0 |
| 7023 | if ConditionPassed() then |
| 7024 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 7025 | offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 7026 | offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 7027 | address = if index then offset_addr else R[n]; |
| 7028 | R[t] = SignExtend(MemU[address,1], 32); |
| 7029 | if wback then R[n] = offset_addr; |
| 7030 | #endif |
| 7031 | |
| 7032 | bool success = false; |
Caroline Tice | 672f311 | 2011-03-01 23:55:59 +0000 | [diff] [blame] | 7033 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7034 | if (ConditionPassed(opcode)) |
Caroline Tice | 672f311 | 2011-03-01 23:55:59 +0000 | [diff] [blame] | 7035 | { |
| 7036 | uint32_t t; |
| 7037 | uint32_t n; |
| 7038 | uint32_t m; |
| 7039 | bool index; |
| 7040 | bool add; |
| 7041 | bool wback; |
| 7042 | ARM_ShifterType shift_t; |
| 7043 | uint32_t shift_n; |
| 7044 | |
| 7045 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 7046 | switch (encoding) |
| 7047 | { |
| 7048 | case eEncodingT1: |
| 7049 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 7050 | t = Bits32 (opcode, 2, 0); |
| 7051 | n = Bits32 (opcode, 5, 3); |
| 7052 | m = Bits32 (opcode, 8, 6); |
| 7053 | |
| 7054 | // index = TRUE; add = TRUE; wback = FALSE; |
| 7055 | index = true; |
| 7056 | add = true; |
| 7057 | wback = false; |
| 7058 | |
| 7059 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 7060 | shift_t = SRType_LSL; |
| 7061 | shift_n = 0; |
| 7062 | |
| 7063 | break; |
| 7064 | |
| 7065 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7066 | // if Rt == '1111' then SEE PLI; |
| 7067 | // if Rn == '1111' then SEE LDRSB (literal); |
Caroline Tice | 672f311 | 2011-03-01 23:55:59 +0000 | [diff] [blame] | 7068 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 7069 | t = Bits32 (opcode, 15, 12); |
| 7070 | n = Bits32 (opcode, 19, 16); |
| 7071 | m = Bits32 (opcode, 3, 0); |
| 7072 | |
| 7073 | // index = TRUE; add = TRUE; wback = FALSE; |
| 7074 | index = true; |
| 7075 | add = true; |
| 7076 | wback = false; |
| 7077 | |
| 7078 | // (shift_t, shift_n) = (SRType_LSL, UInt(imm2)); |
| 7079 | shift_t = SRType_LSL; |
| 7080 | shift_n = Bits32 (opcode, 5, 4); |
| 7081 | |
| 7082 | // if t == 13 || BadReg(m) then UNPREDICTABLE; |
| 7083 | if ((t == 13) || BadReg (m)) |
| 7084 | return false; |
| 7085 | break; |
| 7086 | |
| 7087 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7088 | // if P == '0' && W == '1' then SEE LDRSBT; |
Caroline Tice | 672f311 | 2011-03-01 23:55:59 +0000 | [diff] [blame] | 7089 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 7090 | t = Bits32 (opcode, 15, 12); |
| 7091 | n = Bits32 (opcode, 19, 16); |
| 7092 | m = Bits32 (opcode, 3, 0); |
| 7093 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7094 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
Caroline Tice | 672f311 | 2011-03-01 23:55:59 +0000 | [diff] [blame] | 7095 | index = BitIsSet (opcode, 24); |
| 7096 | add = BitIsSet (opcode, 23); |
| 7097 | wback = BitIsClear (opcode, 24) || BitIsSet (opcode, 21); |
| 7098 | |
| 7099 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 7100 | shift_t = SRType_LSL; |
| 7101 | shift_n = 0; |
| 7102 | |
| 7103 | // if t == 15 || m == 15 then UNPREDICTABLE; |
| 7104 | if ((t == 15) || (m == 15)) |
| 7105 | return false; |
| 7106 | |
| 7107 | // if wback && (n == 15 || n == t) then UNPREDICTABLE; |
| 7108 | if (wback && ((n == 15) || (n == t))) |
| 7109 | return false; |
| 7110 | break; |
| 7111 | |
| 7112 | default: |
| 7113 | return false; |
| 7114 | } |
| 7115 | |
| 7116 | uint64_t Rm = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 7117 | if (!success) |
| 7118 | return false; |
| 7119 | |
| 7120 | // offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 7121 | addr_t offset = Shift (Rm, shift_t, shift_n, APSR_C); |
| 7122 | |
| 7123 | addr_t offset_addr; |
| 7124 | addr_t address; |
| 7125 | |
| 7126 | // offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 7127 | uint64_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 7128 | if (!success) |
| 7129 | return false; |
| 7130 | |
| 7131 | if (add) |
| 7132 | offset_addr = Rn + offset; |
| 7133 | else |
| 7134 | offset_addr = Rn - offset; |
| 7135 | |
| 7136 | // address = if index then offset_addr else R[n]; |
| 7137 | if (index) |
| 7138 | address = offset_addr; |
| 7139 | else |
| 7140 | address = Rn; |
| 7141 | |
| 7142 | // R[t] = SignExtend(MemU[address,1], 32); |
| 7143 | Register base_reg; |
| 7144 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 7145 | Register offset_reg; |
| 7146 | offset_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + m); |
| 7147 | |
| 7148 | EmulateInstruction::Context context; |
| 7149 | context.type = eContextRegisterLoad; |
| 7150 | context.SetRegisterPlusIndirectOffset (base_reg, offset_reg); |
| 7151 | |
| 7152 | uint64_t unsigned_data = MemURead (context, address, 1, 0, &success); |
| 7153 | if (!success) |
| 7154 | return false; |
| 7155 | |
| 7156 | int64_t signed_data = llvm::SignExtend64<8>(unsigned_data); |
| 7157 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, (uint64_t) signed_data)) |
| 7158 | return false; |
| 7159 | |
| 7160 | // if wback then R[n] = offset_addr; |
| 7161 | if (wback) |
| 7162 | { |
| 7163 | context.type = eContextAdjustBaseRegister; |
| 7164 | context.SetAddress (offset_addr); |
| 7165 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 7166 | return false; |
| 7167 | } |
| 7168 | } |
| 7169 | return true; |
| 7170 | } |
| 7171 | |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7172 | // LDRSH (immediate) calculates an address from a base register value and an immediate offset, loads a halfword from |
| 7173 | // memory, sign-extends it to form a 32-bit word, and writes it to a register. It can use offset, post-indexed, or |
| 7174 | // pre-indexed addressing. |
| 7175 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7176 | EmulateInstructionARM::EmulateLDRSHImmediate (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7177 | { |
| 7178 | #if 0 |
| 7179 | if ConditionPassed() then |
| 7180 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 7181 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 7182 | address = if index then offset_addr else R[n]; |
| 7183 | data = MemU[address,2]; |
| 7184 | if wback then R[n] = offset_addr; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7185 | if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7186 | R[t] = SignExtend(data, 32); |
| 7187 | else // Can only apply before ARMv7 |
| 7188 | R[t] = bits(32) UNKNOWN; |
| 7189 | #endif |
| 7190 | |
| 7191 | bool success = false; |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7192 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7193 | if (ConditionPassed(opcode)) |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7194 | { |
| 7195 | uint32_t t; |
| 7196 | uint32_t n; |
| 7197 | uint32_t imm32; |
| 7198 | bool index; |
| 7199 | bool add; |
| 7200 | bool wback; |
| 7201 | |
| 7202 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 7203 | switch (encoding) |
| 7204 | { |
| 7205 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7206 | // if Rn == '1111' then SEE LDRSH (literal); |
| 7207 | // if Rt == '1111' then SEE "Unallocated memory hints"; |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7208 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 7209 | t = Bits32 (opcode, 15, 12); |
| 7210 | n = Bits32 (opcode, 19, 16); |
| 7211 | imm32 = Bits32 (opcode, 11, 0); |
| 7212 | |
| 7213 | // index = TRUE; add = TRUE; wback = FALSE; |
| 7214 | index = true; |
| 7215 | add = true; |
| 7216 | wback = false; |
| 7217 | |
| 7218 | // if t == 13 then UNPREDICTABLE; |
| 7219 | if (t == 13) |
| 7220 | return false; |
| 7221 | |
| 7222 | break; |
| 7223 | |
| 7224 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7225 | // if Rn == '1111' then SEE LDRSH (literal); |
| 7226 | // if Rt == '1111' && P == '1' && U == '0' && W == '0' then SEE "Unallocated memory hints"; |
| 7227 | // if P == '1' && U == '1' && W == '0' then SEE LDRSHT; |
| 7228 | // if P == '0' && W == '0' then UNDEFINED; |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7229 | if (BitIsClear (opcode, 10) && BitIsClear (opcode, 8)) |
| 7230 | return false; |
| 7231 | |
| 7232 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm8, 32); |
| 7233 | t = Bits32 (opcode, 15, 12); |
| 7234 | n = Bits32 (opcode, 19, 16); |
| 7235 | imm32 = Bits32 (opcode, 7, 0); |
| 7236 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7237 | // index = (P == '1'); add = (U == '1'); wback = (W == '1'); |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7238 | index = BitIsSet (opcode, 10); |
| 7239 | add = BitIsSet (opcode, 9); |
| 7240 | wback = BitIsSet (opcode, 8); |
| 7241 | |
| 7242 | // if BadReg(t) || (wback && n == t) then UNPREDICTABLE; |
| 7243 | if (BadReg (t) || (wback && (n == t))) |
| 7244 | return false; |
| 7245 | |
| 7246 | break; |
| 7247 | |
| 7248 | case eEncodingA1: |
| 7249 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7250 | // if Rn == '1111' then SEE LDRSH (literal); |
| 7251 | // if P == '0' && W == '1' then SEE LDRSHT; |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7252 | // t == UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm4H:imm4L, 32); |
| 7253 | t = Bits32 (opcode, 15, 12); |
| 7254 | n = Bits32 (opcode, 19, 16); |
| 7255 | uint32_t imm4H = Bits32 (opcode, 11,8); |
| 7256 | uint32_t imm4L = Bits32 (opcode, 3, 0); |
Caroline Tice | 40b1a6c | 2011-03-03 00:07:02 +0000 | [diff] [blame] | 7257 | imm32 = (imm4H << 4) | imm4L; |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7258 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7259 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7260 | index = BitIsSet (opcode, 24); |
| 7261 | add = BitIsSet (opcode, 23); |
| 7262 | wback = BitIsClear (opcode, 24) || BitIsSet (opcode, 21); |
| 7263 | |
| 7264 | // if t == 15 || (wback && n == t) then UNPREDICTABLE; |
| 7265 | if ((t == 15) || (wback && (n == t))) |
| 7266 | return false; |
| 7267 | |
| 7268 | break; |
| 7269 | } |
| 7270 | |
| 7271 | default: |
| 7272 | return false; |
| 7273 | } |
| 7274 | |
| 7275 | // offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 7276 | uint64_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 7277 | if (!success) |
| 7278 | return false; |
| 7279 | |
| 7280 | addr_t offset_addr; |
| 7281 | if (add) |
| 7282 | offset_addr = Rn + imm32; |
| 7283 | else |
| 7284 | offset_addr = Rn - imm32; |
| 7285 | |
| 7286 | // address = if index then offset_addr else R[n]; |
| 7287 | addr_t address; |
| 7288 | if (index) |
| 7289 | address = offset_addr; |
| 7290 | else |
| 7291 | address = Rn; |
| 7292 | |
| 7293 | // data = MemU[address,2]; |
| 7294 | Register base_reg; |
| 7295 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 7296 | |
| 7297 | EmulateInstruction::Context context; |
| 7298 | context.type = eContextRegisterLoad; |
| 7299 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 7300 | |
| 7301 | uint64_t data = MemURead (context, address, 2, 0, &success); |
| 7302 | if (!success) |
| 7303 | return false; |
| 7304 | |
| 7305 | // if wback then R[n] = offset_addr; |
| 7306 | if (wback) |
| 7307 | { |
| 7308 | context.type = eContextAdjustBaseRegister; |
| 7309 | context.SetAddress (offset_addr); |
| 7310 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 7311 | return false; |
| 7312 | } |
| 7313 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7314 | // if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 78fb563 | 2011-03-02 00:39:42 +0000 | [diff] [blame] | 7315 | if (UnalignedSupport() || BitIsClear (address, 0)) |
| 7316 | { |
| 7317 | // R[t] = SignExtend(data, 32); |
| 7318 | int64_t signed_data = llvm::SignExtend64<16>(data); |
| 7319 | context.type = eContextRegisterLoad; |
| 7320 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 7321 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, (uint64_t) signed_data)) |
| 7322 | return false; |
| 7323 | } |
| 7324 | else // Can only apply before ARMv7 |
| 7325 | { |
| 7326 | // R[t] = bits(32) UNKNOWN; |
| 7327 | WriteBits32Unknown (t); |
| 7328 | } |
| 7329 | } |
| 7330 | return true; |
| 7331 | } |
| 7332 | |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7333 | // LDRSH (literal) calculates an address from the PC value and an immediate offset, loads a halfword from memory, |
| 7334 | // sign-extends it to from a 32-bit word, and writes it to a register. |
| 7335 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7336 | EmulateInstructionARM::EmulateLDRSHLiteral (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7337 | { |
| 7338 | #if 0 |
| 7339 | if ConditionPassed() then |
| 7340 | EncodingSpecificOperations(); NullCheckIfThumbEE(15); |
| 7341 | base = Align(PC,4); |
| 7342 | address = if add then (base + imm32) else (base - imm32); |
| 7343 | data = MemU[address,2]; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7344 | if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7345 | R[t] = SignExtend(data, 32); |
| 7346 | else // Can only apply before ARMv7 |
| 7347 | R[t] = bits(32) UNKNOWN; |
| 7348 | #endif |
| 7349 | |
| 7350 | bool success = false; |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7351 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7352 | if (ConditionPassed(opcode)) |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7353 | { |
| 7354 | uint32_t t; |
| 7355 | uint32_t imm32; |
| 7356 | bool add; |
| 7357 | |
| 7358 | // EncodingSpecificOperations(); NullCheckIfThumbEE(15); |
| 7359 | switch (encoding) |
| 7360 | { |
| 7361 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7362 | // if Rt == '1111' then SEE "Unallocated memory hints"; |
| 7363 | // t = UInt(Rt); imm32 = ZeroExtend(imm12, 32); add = (U == '1'); |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7364 | t = Bits32 (opcode, 15, 12); |
| 7365 | imm32 = Bits32 (opcode, 11, 0); |
| 7366 | add = BitIsSet (opcode, 23); |
| 7367 | |
| 7368 | // if t == 13 then UNPREDICTABLE; |
| 7369 | if (t == 13) |
| 7370 | return false; |
| 7371 | |
| 7372 | break; |
| 7373 | |
| 7374 | case eEncodingA1: |
| 7375 | { |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7376 | // t == UInt(Rt); imm32 = ZeroExtend(imm4H:imm4L, 32); add = (U == '1'); |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7377 | t = Bits32 (opcode, 15, 12); |
| 7378 | uint32_t imm4H = Bits32 (opcode, 11, 8); |
| 7379 | uint32_t imm4L = Bits32 (opcode, 3, 0); |
Caroline Tice | 40b1a6c | 2011-03-03 00:07:02 +0000 | [diff] [blame] | 7380 | imm32 = (imm4H << 4) | imm4L; |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7381 | add = BitIsSet (opcode, 23); |
| 7382 | |
| 7383 | // if t == 15 then UNPREDICTABLE; |
| 7384 | if (t == 15) |
| 7385 | return false; |
| 7386 | |
| 7387 | break; |
| 7388 | } |
| 7389 | default: |
| 7390 | return false; |
| 7391 | } |
| 7392 | |
| 7393 | // base = Align(PC,4); |
Caroline Tice | 8d681f5 | 2011-03-17 23:50:16 +0000 | [diff] [blame] | 7394 | uint64_t pc_value = ReadCoreReg (PC_REG, &success); |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7395 | if (!success) |
| 7396 | return false; |
| 7397 | |
| 7398 | uint64_t base = AlignPC (pc_value); |
| 7399 | |
| 7400 | addr_t address; |
| 7401 | // address = if add then (base + imm32) else (base - imm32); |
| 7402 | if (add) |
| 7403 | address = base + imm32; |
| 7404 | else |
| 7405 | address = base - imm32; |
| 7406 | |
| 7407 | // data = MemU[address,2]; |
| 7408 | Register base_reg; |
| 7409 | base_reg.SetRegister (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC); |
| 7410 | |
| 7411 | EmulateInstruction::Context context; |
| 7412 | context.type = eContextRegisterLoad; |
| 7413 | context.SetRegisterPlusOffset (base_reg, imm32); |
| 7414 | |
| 7415 | uint64_t data = MemURead (context, address, 2, 0, &success); |
| 7416 | if (!success) |
| 7417 | return false; |
| 7418 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7419 | // if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | d2fac09 | 2011-03-02 19:45:34 +0000 | [diff] [blame] | 7420 | if (UnalignedSupport() || BitIsClear (address, 0)) |
| 7421 | { |
| 7422 | // R[t] = SignExtend(data, 32); |
| 7423 | int64_t signed_data = llvm::SignExtend64<16>(data); |
| 7424 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, (uint64_t) signed_data)) |
| 7425 | return false; |
| 7426 | } |
| 7427 | else // Can only apply before ARMv7 |
| 7428 | { |
| 7429 | // R[t] = bits(32) UNKNOWN; |
| 7430 | WriteBits32Unknown (t); |
| 7431 | } |
| 7432 | } |
| 7433 | return true; |
| 7434 | } |
| 7435 | |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7436 | // LDRSH (register) calculates an address from a base register value and an offset register value, loads a halfword |
| 7437 | // from memory, sign-extends it to form a 32-bit word, and writes it to a register. The offset register value can be |
| 7438 | // shifted left by 0, 1, 2, or 3 bits. |
| 7439 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7440 | EmulateInstructionARM::EmulateLDRSHRegister (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7441 | { |
| 7442 | #if 0 |
| 7443 | if ConditionPassed() then |
| 7444 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 7445 | offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 7446 | offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 7447 | address = if index then offset_addr else R[n]; |
| 7448 | data = MemU[address,2]; |
| 7449 | if wback then R[n] = offset_addr; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7450 | if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7451 | R[t] = SignExtend(data, 32); |
| 7452 | else // Can only apply before ARMv7 |
| 7453 | R[t] = bits(32) UNKNOWN; |
| 7454 | #endif |
| 7455 | |
| 7456 | bool success = false; |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7457 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7458 | if (ConditionPassed(opcode)) |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7459 | { |
| 7460 | uint32_t t; |
| 7461 | uint32_t n; |
| 7462 | uint32_t m; |
| 7463 | bool index; |
| 7464 | bool add; |
| 7465 | bool wback; |
| 7466 | ARM_ShifterType shift_t; |
| 7467 | uint32_t shift_n; |
| 7468 | |
| 7469 | // EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 7470 | switch (encoding) |
| 7471 | { |
| 7472 | case eEncodingT1: |
| 7473 | // if CurrentInstrSet() == InstrSet_ThumbEE then SEE "Modified operation in ThumbEE"; |
| 7474 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 7475 | t = Bits32 (opcode, 2, 0); |
| 7476 | n = Bits32 (opcode, 5, 3); |
| 7477 | m = Bits32 (opcode, 8, 6); |
| 7478 | |
| 7479 | // index = TRUE; add = TRUE; wback = FALSE; |
| 7480 | index = true; |
| 7481 | add = true; |
| 7482 | wback = false; |
| 7483 | |
| 7484 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 7485 | shift_t = SRType_LSL; |
| 7486 | shift_n = 0; |
| 7487 | |
| 7488 | break; |
| 7489 | |
| 7490 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7491 | // if Rn == '1111' then SEE LDRSH (literal); |
| 7492 | // if Rt == '1111' then SEE "Unallocated memory hints"; |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7493 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 7494 | t = Bits32 (opcode, 15, 12); |
| 7495 | n = Bits32 (opcode, 19, 16); |
| 7496 | m = Bits32 (opcode, 3, 0); |
| 7497 | |
| 7498 | // index = TRUE; add = TRUE; wback = FALSE; |
| 7499 | index = true; |
| 7500 | add = true; |
| 7501 | wback = false; |
| 7502 | |
| 7503 | // (shift_t, shift_n) = (SRType_LSL, UInt(imm2)); |
| 7504 | shift_t = SRType_LSL; |
| 7505 | shift_n = Bits32 (opcode, 5, 4); |
| 7506 | |
| 7507 | // if t == 13 || BadReg(m) then UNPREDICTABLE; |
| 7508 | if ((t == 13) || BadReg (m)) |
| 7509 | return false; |
| 7510 | |
| 7511 | break; |
| 7512 | |
| 7513 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7514 | // if P == '0' && W == '1' then SEE LDRSHT; |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7515 | // t = UInt(Rt); n = UInt(Rn); m = UInt(Rm); |
| 7516 | t = Bits32 (opcode, 15, 12); |
| 7517 | n = Bits32 (opcode, 19, 16); |
| 7518 | m = Bits32 (opcode, 3, 0); |
| 7519 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7520 | // index = (P == '1'); add = (U == '1'); wback = (P == '0') || (W == '1'); |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7521 | index = BitIsSet (opcode, 24); |
| 7522 | add = BitIsSet (opcode, 23); |
| 7523 | wback = BitIsClear (opcode, 24) || BitIsSet (opcode, 21); |
| 7524 | |
| 7525 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 7526 | shift_t = SRType_LSL; |
| 7527 | shift_n = 0; |
| 7528 | |
| 7529 | // if t == 15 || m == 15 then UNPREDICTABLE; |
| 7530 | if ((t == 15) || (m == 15)) |
| 7531 | return false; |
| 7532 | |
| 7533 | // if wback && (n == 15 || n == t) then UNPREDICTABLE; |
| 7534 | if (wback && ((n == 15) || (n == t))) |
| 7535 | return false; |
| 7536 | |
| 7537 | break; |
| 7538 | |
| 7539 | default: |
| 7540 | break; |
| 7541 | } |
| 7542 | |
| 7543 | uint64_t Rm = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 7544 | if (!success) |
| 7545 | return false; |
| 7546 | |
| 7547 | uint64_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 7548 | if (!success) |
| 7549 | return false; |
| 7550 | |
| 7551 | // offset = Shift(R[m], shift_t, shift_n, APSR.C); |
| 7552 | addr_t offset = Shift (Rm, shift_t, shift_n, APSR_C); |
| 7553 | |
| 7554 | addr_t offset_addr; |
| 7555 | addr_t address; |
| 7556 | |
| 7557 | // offset_addr = if add then (R[n] + offset) else (R[n] - offset); |
| 7558 | if (add) |
| 7559 | offset_addr = Rn + offset; |
| 7560 | else |
| 7561 | offset_addr = Rn - offset; |
| 7562 | |
| 7563 | // address = if index then offset_addr else R[n]; |
| 7564 | if (index) |
| 7565 | address = offset_addr; |
| 7566 | else |
| 7567 | address = Rn; |
| 7568 | |
| 7569 | // data = MemU[address,2]; |
| 7570 | Register base_reg; |
| 7571 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 7572 | |
| 7573 | Register offset_reg; |
| 7574 | offset_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + m); |
| 7575 | |
| 7576 | EmulateInstruction::Context context; |
| 7577 | context.type = eContextRegisterLoad; |
| 7578 | context.SetRegisterPlusIndirectOffset (base_reg, offset_reg); |
| 7579 | |
| 7580 | uint64_t data = MemURead (context, address, 2, 0, &success); |
| 7581 | if (!success) |
| 7582 | return false; |
| 7583 | |
| 7584 | // if wback then R[n] = offset_addr; |
| 7585 | if (wback) |
| 7586 | { |
| 7587 | context.type = eContextAdjustBaseRegister; |
| 7588 | context.SetAddress (offset_addr); |
| 7589 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 7590 | return false; |
| 7591 | } |
| 7592 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7593 | // if UnalignedSupport() || address<0> = '0' then |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7594 | if (UnalignedSupport() || BitIsClear (address, 0)) |
| 7595 | { |
| 7596 | // R[t] = SignExtend(data, 32); |
| 7597 | context.type = eContextRegisterLoad; |
| 7598 | context.SetRegisterPlusIndirectOffset (base_reg, offset_reg); |
| 7599 | |
| 7600 | int64_t signed_data = llvm::SignExtend64<16>(data); |
| 7601 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, (uint64_t) signed_data)) |
| 7602 | return false; |
| 7603 | } |
| 7604 | else // Can only apply before ARMv7 |
| 7605 | { |
| 7606 | // R[t] = bits(32) UNKNOWN; |
| 7607 | WriteBits32Unknown (t); |
| 7608 | } |
| 7609 | } |
| 7610 | return true; |
| 7611 | } |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7612 | |
| 7613 | // SXTB extracts an 8-bit value from a register, sign-extends it to 32 bits, and writes the result to the destination |
| 7614 | // register. You can specifiy a rotation by 0, 8, 16, or 24 bits before extracting the 8-bit value. |
| 7615 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7616 | EmulateInstructionARM::EmulateSXTB (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7617 | { |
| 7618 | #if 0 |
| 7619 | if ConditionPassed() then |
| 7620 | EncodingSpecificOperations(); |
| 7621 | rotated = ROR(R[m], rotation); |
| 7622 | R[d] = SignExtend(rotated<7:0>, 32); |
| 7623 | #endif |
| 7624 | |
| 7625 | bool success = false; |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7626 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7627 | if (ConditionPassed(opcode)) |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7628 | { |
| 7629 | uint32_t d; |
| 7630 | uint32_t m; |
| 7631 | uint32_t rotation; |
| 7632 | |
| 7633 | // EncodingSpecificOperations(); |
| 7634 | switch (encoding) |
| 7635 | { |
| 7636 | case eEncodingT1: |
| 7637 | // d = UInt(Rd); m = UInt(Rm); rotation = 0; |
| 7638 | d = Bits32 (opcode, 2, 0); |
| 7639 | m = Bits32 (opcode, 5, 3); |
| 7640 | rotation = 0; |
| 7641 | |
| 7642 | break; |
| 7643 | |
| 7644 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7645 | // d = UInt(Rd); m = UInt(Rm); rotation = UInt(rotate:'000'); |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7646 | d = Bits32 (opcode, 11, 8); |
| 7647 | m = Bits32 (opcode, 3, 0); |
| 7648 | rotation = Bits32 (opcode, 5, 4) << 3; |
| 7649 | |
| 7650 | // if BadReg(d) || BadReg(m) then UNPREDICTABLE; |
| 7651 | if (BadReg (d) || BadReg (m)) |
| 7652 | return false; |
| 7653 | |
| 7654 | break; |
| 7655 | |
| 7656 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7657 | // d = UInt(Rd); m = UInt(Rm); rotation = UInt(rotate:'000'); |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7658 | d = Bits32 (opcode, 15, 12); |
| 7659 | m = Bits32 (opcode, 3, 0); |
| 7660 | rotation = Bits32 (opcode, 11, 10) << 3; |
| 7661 | |
| 7662 | // if d == 15 || m == 15 then UNPREDICTABLE; |
| 7663 | if ((d == 15) || (m == 15)) |
| 7664 | return false; |
| 7665 | |
| 7666 | break; |
| 7667 | |
| 7668 | default: |
| 7669 | return false; |
| 7670 | } |
| 7671 | |
Caroline Tice | 868198b | 2011-03-03 18:04:49 +0000 | [diff] [blame] | 7672 | uint64_t Rm = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 7673 | if (!success) |
| 7674 | return false; |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7675 | |
| 7676 | // rotated = ROR(R[m], rotation); |
| 7677 | uint64_t rotated = ROR (Rm, rotation); |
| 7678 | |
| 7679 | // R[d] = SignExtend(rotated<7:0>, 32); |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7680 | int64_t data = llvm::SignExtend64<8>(rotated); |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7681 | |
| 7682 | Register source_reg; |
| 7683 | source_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + m); |
| 7684 | |
| 7685 | EmulateInstruction::Context context; |
| 7686 | context.type = eContextRegisterLoad; |
| 7687 | context.SetRegister (source_reg); |
| 7688 | |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7689 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + d, (uint64_t) data)) |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 7690 | return false; |
| 7691 | } |
| 7692 | return true; |
| 7693 | } |
Caroline Tice | 291a3e9 | 2011-03-02 21:13:44 +0000 | [diff] [blame] | 7694 | |
Caroline Tice | 868198b | 2011-03-03 18:04:49 +0000 | [diff] [blame] | 7695 | // SXTH extracts a 16-bit value from a register, sign-extends it to 32 bits, and writes the result to the destination |
| 7696 | // register. You can specify a rotation by 0, 8, 16, or 24 bits before extracting the 16-bit value. |
| 7697 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7698 | EmulateInstructionARM::EmulateSXTH (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 868198b | 2011-03-03 18:04:49 +0000 | [diff] [blame] | 7699 | { |
| 7700 | #if 0 |
| 7701 | if ConditionPassed() then |
| 7702 | EncodingSpecificOperations(); |
| 7703 | rotated = ROR(R[m], rotation); |
| 7704 | R[d] = SignExtend(rotated<15:0>, 32); |
| 7705 | #endif |
| 7706 | |
| 7707 | bool success = false; |
Caroline Tice | 868198b | 2011-03-03 18:04:49 +0000 | [diff] [blame] | 7708 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7709 | if (ConditionPassed(opcode)) |
Caroline Tice | 868198b | 2011-03-03 18:04:49 +0000 | [diff] [blame] | 7710 | { |
| 7711 | uint32_t d; |
| 7712 | uint32_t m; |
| 7713 | uint32_t rotation; |
| 7714 | |
| 7715 | // EncodingSpecificOperations(); |
| 7716 | switch (encoding) |
| 7717 | { |
| 7718 | case eEncodingT1: |
| 7719 | // d = UInt(Rd); m = UInt(Rm); rotation = 0; |
| 7720 | d = Bits32 (opcode, 2, 0); |
| 7721 | m = Bits32 (opcode, 5, 3); |
| 7722 | rotation = 0; |
| 7723 | |
| 7724 | break; |
| 7725 | |
| 7726 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7727 | // d = UInt(Rd); m = UInt(Rm); rotation = UInt(rotate:'000'); |
Caroline Tice | 868198b | 2011-03-03 18:04:49 +0000 | [diff] [blame] | 7728 | d = Bits32 (opcode, 11, 8); |
| 7729 | m = Bits32 (opcode, 3, 0); |
| 7730 | rotation = Bits32 (opcode, 5, 4) << 3; |
| 7731 | |
| 7732 | // if BadReg(d) || BadReg(m) then UNPREDICTABLE; |
| 7733 | if (BadReg (d) || BadReg (m)) |
| 7734 | return false; |
| 7735 | |
| 7736 | break; |
| 7737 | |
| 7738 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7739 | // d = UInt(Rd); m = UInt(Rm); rotation = UInt(rotate:'000'); |
Caroline Tice | 868198b | 2011-03-03 18:04:49 +0000 | [diff] [blame] | 7740 | d = Bits32 (opcode, 15, 12); |
| 7741 | m = Bits32 (opcode, 3, 0); |
| 7742 | rotation = Bits32 (opcode, 11, 10) << 3; |
| 7743 | |
| 7744 | // if d == 15 || m == 15 then UNPREDICTABLE; |
| 7745 | if ((d == 15) || (m == 15)) |
| 7746 | return false; |
| 7747 | |
| 7748 | break; |
| 7749 | |
| 7750 | default: |
| 7751 | return false; |
| 7752 | } |
| 7753 | |
| 7754 | uint64_t Rm = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 7755 | if (!success) |
| 7756 | return false; |
| 7757 | |
| 7758 | // rotated = ROR(R[m], rotation); |
| 7759 | uint64_t rotated = ROR (Rm, rotation); |
| 7760 | |
| 7761 | // R[d] = SignExtend(rotated<15:0>, 32); |
| 7762 | Register source_reg; |
| 7763 | source_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + m); |
| 7764 | |
| 7765 | EmulateInstruction::Context context; |
| 7766 | context.type = eContextRegisterLoad; |
| 7767 | context.SetRegister (source_reg); |
| 7768 | |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7769 | int64_t data = llvm::SignExtend64<16> (rotated); |
| 7770 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + d, (uint64_t) data)) |
Caroline Tice | 868198b | 2011-03-03 18:04:49 +0000 | [diff] [blame] | 7771 | return false; |
| 7772 | } |
| 7773 | |
| 7774 | return true; |
| 7775 | } |
| 7776 | |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7777 | // UXTB extracts an 8-bit value from a register, zero-extneds it to 32 bits, and writes the result to the destination |
| 7778 | // register. You can specify a rotation by 0, 8, 16, or 24 bits before extracting the 8-bit value. |
| 7779 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7780 | EmulateInstructionARM::EmulateUXTB (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7781 | { |
| 7782 | #if 0 |
| 7783 | if ConditionPassed() then |
| 7784 | EncodingSpecificOperations(); |
| 7785 | rotated = ROR(R[m], rotation); |
| 7786 | R[d] = ZeroExtend(rotated<7:0>, 32); |
| 7787 | #endif |
| 7788 | |
| 7789 | bool success = false; |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7790 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7791 | if (ConditionPassed(opcode)) |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7792 | { |
| 7793 | uint32_t d; |
| 7794 | uint32_t m; |
| 7795 | uint32_t rotation; |
| 7796 | |
| 7797 | // EncodingSpecificOperations(); |
| 7798 | switch (encoding) |
| 7799 | { |
| 7800 | case eEncodingT1: |
| 7801 | // d = UInt(Rd); m = UInt(Rm); rotation = 0; |
| 7802 | d = Bits32 (opcode, 2, 0); |
| 7803 | m = Bits32 (opcode, 5, 3); |
| 7804 | rotation = 0; |
| 7805 | |
| 7806 | break; |
| 7807 | |
| 7808 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7809 | // d = UInt(Rd); m = UInt(Rm); rotation = UInt(rotate:'000'); |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7810 | d = Bits32 (opcode, 11, 8); |
| 7811 | m = Bits32 (opcode, 3, 0); |
| 7812 | rotation = Bits32 (opcode, 5, 4) << 3; |
| 7813 | |
| 7814 | // if BadReg(d) || BadReg(m) then UNPREDICTABLE; |
| 7815 | if (BadReg (d) || BadReg (m)) |
| 7816 | return false; |
| 7817 | |
| 7818 | break; |
| 7819 | |
| 7820 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7821 | // d = UInt(Rd); m = UInt(Rm); rotation = UInt(rotate:'000'); |
Caroline Tice | 8ce96d9 | 2011-03-03 18:27:17 +0000 | [diff] [blame] | 7822 | d = Bits32 (opcode, 15, 12); |
| 7823 | m = Bits32 (opcode, 3, 0); |
| 7824 | rotation = Bits32 (opcode, 11, 10) << 3; |
| 7825 | |
| 7826 | // if d == 15 || m == 15 then UNPREDICTABLE; |
| 7827 | if ((d == 15) || (m == 15)) |
| 7828 | return false; |
| 7829 | |
| 7830 | break; |
| 7831 | |
| 7832 | default: |
| 7833 | return false; |
| 7834 | } |
| 7835 | |
| 7836 | uint64_t Rm = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 7837 | if (!success) |
| 7838 | return false; |
| 7839 | |
| 7840 | // rotated = ROR(R[m], rotation); |
| 7841 | uint64_t rotated = ROR (Rm, rotation); |
| 7842 | |
| 7843 | // R[d] = ZeroExtend(rotated<7:0>, 32); |
| 7844 | Register source_reg; |
| 7845 | source_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + m); |
| 7846 | |
| 7847 | EmulateInstruction::Context context; |
| 7848 | context.type = eContextRegisterLoad; |
| 7849 | context.SetRegister (source_reg); |
| 7850 | |
| 7851 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + d, Bits32 (rotated, 7, 0))) |
| 7852 | return false; |
| 7853 | } |
| 7854 | return true; |
| 7855 | } |
| 7856 | |
Caroline Tice | 11555f2 | 2011-03-03 18:48:58 +0000 | [diff] [blame] | 7857 | // UXTH extracts a 16-bit value from a register, zero-extends it to 32 bits, and writes the result to the destination |
| 7858 | // register. You can specify a rotation by 0, 8, 16, or 24 bits before extracting the 16-bit value. |
| 7859 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7860 | EmulateInstructionARM::EmulateUXTH (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 11555f2 | 2011-03-03 18:48:58 +0000 | [diff] [blame] | 7861 | { |
| 7862 | #if 0 |
| 7863 | if ConditionPassed() then |
| 7864 | EncodingSpecificOperations(); |
| 7865 | rotated = ROR(R[m], rotation); |
| 7866 | R[d] = ZeroExtend(rotated<15:0>, 32); |
| 7867 | #endif |
| 7868 | |
| 7869 | bool success = false; |
Caroline Tice | 11555f2 | 2011-03-03 18:48:58 +0000 | [diff] [blame] | 7870 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7871 | if (ConditionPassed(opcode)) |
Caroline Tice | 11555f2 | 2011-03-03 18:48:58 +0000 | [diff] [blame] | 7872 | { |
| 7873 | uint32_t d; |
| 7874 | uint32_t m; |
| 7875 | uint32_t rotation; |
| 7876 | |
| 7877 | switch (encoding) |
| 7878 | { |
| 7879 | case eEncodingT1: |
| 7880 | // d = UInt(Rd); m = UInt(Rm); rotation = 0; |
| 7881 | d = Bits32 (opcode, 2, 0); |
| 7882 | m = Bits32 (opcode, 5, 3); |
| 7883 | rotation = 0; |
| 7884 | |
| 7885 | break; |
| 7886 | |
| 7887 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7888 | // d = UInt(Rd); m = UInt(Rm); rotation = UInt(rotate:'000'); |
Caroline Tice | 11555f2 | 2011-03-03 18:48:58 +0000 | [diff] [blame] | 7889 | d = Bits32 (opcode, 11, 8); |
| 7890 | m = Bits32 (opcode, 3, 0); |
| 7891 | rotation = Bits32 (opcode, 5, 4) << 3; |
| 7892 | |
| 7893 | // if BadReg(d) || BadReg(m) then UNPREDICTABLE; |
| 7894 | if (BadReg (d) || BadReg (m)) |
| 7895 | return false; |
| 7896 | |
| 7897 | break; |
| 7898 | |
| 7899 | case eEncodingA1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7900 | // d = UInt(Rd); m = UInt(Rm); rotation = UInt(rotate:'000'); |
Caroline Tice | 11555f2 | 2011-03-03 18:48:58 +0000 | [diff] [blame] | 7901 | d = Bits32 (opcode, 15, 12); |
| 7902 | m = Bits32 (opcode, 3, 0); |
| 7903 | rotation = Bits32 (opcode, 11, 10) << 3; |
| 7904 | |
| 7905 | // if d == 15 || m == 15 then UNPREDICTABLE; |
| 7906 | if ((d == 15) || (m == 15)) |
| 7907 | return false; |
| 7908 | |
| 7909 | break; |
| 7910 | |
| 7911 | default: |
| 7912 | return false; |
| 7913 | } |
| 7914 | |
| 7915 | uint64_t Rm = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + m, 0, &success); |
| 7916 | if (!success) |
| 7917 | return false; |
| 7918 | |
| 7919 | // rotated = ROR(R[m], rotation); |
| 7920 | uint64_t rotated = ROR (Rm, rotation); |
| 7921 | |
| 7922 | // R[d] = ZeroExtend(rotated<15:0>, 32); |
| 7923 | Register source_reg; |
| 7924 | source_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + m); |
| 7925 | |
| 7926 | EmulateInstruction::Context context; |
| 7927 | context.type = eContextRegisterLoad; |
| 7928 | context.SetRegister (source_reg); |
| 7929 | |
| 7930 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + d, Bits32 (rotated, 15, 0))) |
| 7931 | return false; |
| 7932 | } |
| 7933 | return true; |
| 7934 | } |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 7935 | |
| 7936 | // RFE (Return From Exception) loads the PC and the CPSR from the word at the specified address and the following |
| 7937 | // word respectively. |
| 7938 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7939 | EmulateInstructionARM::EmulateRFE (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 7940 | { |
| 7941 | #if 0 |
| 7942 | if ConditionPassed() then |
| 7943 | EncodingSpecificOperations(); |
| 7944 | if !CurrentModeIsPrivileged() || CurrentInstrSet() == InstrSet_ThumbEE then |
| 7945 | UNPREDICTABLE; |
| 7946 | else |
| 7947 | address = if increment then R[n] else R[n]-8; |
| 7948 | if wordhigher then address = address+4; |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7949 | CPSRWriteByInstr(MemA[address+4,4], '1111', TRUE); |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 7950 | BranchWritePC(MemA[address,4]); |
| 7951 | if wback then R[n] = if increment then R[n]+8 else R[n]-8; |
| 7952 | #endif |
| 7953 | |
| 7954 | bool success = false; |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 7955 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 7956 | if (ConditionPassed(opcode)) |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 7957 | { |
| 7958 | uint32_t n; |
| 7959 | bool wback; |
| 7960 | bool increment; |
| 7961 | bool wordhigher; |
| 7962 | |
| 7963 | // EncodingSpecificOperations(); |
| 7964 | switch (encoding) |
| 7965 | { |
| 7966 | case eEncodingT1: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7967 | // n = UInt(Rn); wback = (W == '1'); increment = FALSE; wordhigher = FALSE; |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 7968 | n = Bits32 (opcode, 19, 16); |
| 7969 | wback = BitIsSet (opcode, 21); |
| 7970 | increment = false; |
| 7971 | wordhigher = false; |
| 7972 | |
| 7973 | // if n == 15 then UNPREDICTABLE; |
| 7974 | if (n == 15) |
| 7975 | return false; |
| 7976 | |
| 7977 | // if InITBlock() && !LastInITBlock() then UNPREDICTABLE; |
| 7978 | if (InITBlock() && !LastInITBlock()) |
| 7979 | return false; |
| 7980 | |
| 7981 | break; |
| 7982 | |
| 7983 | case eEncodingT2: |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 7984 | // n = UInt(Rn); wback = (W == '1'); increment = TRUE; wordhigher = FALSE; |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 7985 | n = Bits32 (opcode, 19, 16); |
| 7986 | wback = BitIsSet (opcode, 21); |
| 7987 | increment = true; |
| 7988 | wordhigher = false; |
| 7989 | |
| 7990 | // if n == 15 then UNPREDICTABLE; |
| 7991 | if (n == 15) |
| 7992 | return false; |
| 7993 | |
| 7994 | // if InITBlock() && !LastInITBlock() then UNPREDICTABLE; |
| 7995 | if (InITBlock() && !LastInITBlock()) |
| 7996 | return false; |
| 7997 | |
| 7998 | break; |
| 7999 | |
| 8000 | case eEncodingA1: |
| 8001 | // n = UInt(Rn); |
| 8002 | n = Bits32 (opcode, 19, 16); |
| 8003 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 8004 | // wback = (W == '1'); inc = (U == '1'); wordhigher = (P == U); |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 8005 | wback = BitIsSet (opcode, 21); |
| 8006 | increment = BitIsSet (opcode, 23); |
| 8007 | wordhigher = (Bit32 (opcode, 24) == Bit32 (opcode, 23)); |
| 8008 | |
| 8009 | // if n == 15 then UNPREDICTABLE; |
| 8010 | if (n == 15) |
| 8011 | return false; |
| 8012 | |
| 8013 | break; |
| 8014 | |
| 8015 | default: |
| 8016 | return false; |
| 8017 | } |
| 8018 | |
| 8019 | // if !CurrentModeIsPrivileged() || CurrentInstrSet() == InstrSet_ThumbEE then |
| 8020 | if (!CurrentModeIsPrivileged ()) |
| 8021 | // UNPREDICTABLE; |
| 8022 | return false; |
| 8023 | else |
| 8024 | { |
| 8025 | uint64_t Rn = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + n, 0, &success); |
| 8026 | if (!success) |
| 8027 | return false; |
| 8028 | |
| 8029 | addr_t address; |
| 8030 | // address = if increment then R[n] else R[n]-8; |
| 8031 | if (increment) |
| 8032 | address = Rn; |
| 8033 | else |
| 8034 | address = Rn - 8; |
| 8035 | |
| 8036 | // if wordhigher then address = address+4; |
| 8037 | if (wordhigher) |
| 8038 | address = address + 4; |
| 8039 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 8040 | // CPSRWriteByInstr(MemA[address+4,4], '1111', TRUE); |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 8041 | Register base_reg; |
| 8042 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 8043 | |
| 8044 | EmulateInstruction::Context context; |
| 8045 | context.type = eContextReturnFromException; |
| 8046 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 8047 | |
| 8048 | uint64_t data = MemARead (context, address + 4, 4, 0, &success); |
| 8049 | if (!success) |
| 8050 | return false; |
| 8051 | |
| 8052 | CPSRWriteByInstr (data, 15, true); |
| 8053 | |
| 8054 | // BranchWritePC(MemA[address,4]); |
| 8055 | uint64_t data2 = MemARead (context, address, 4, 0, &success); |
| 8056 | if (!success) |
| 8057 | return false; |
| 8058 | |
| 8059 | BranchWritePC (context, data2); |
| 8060 | |
| 8061 | // if wback then R[n] = if increment then R[n]+8 else R[n]-8; |
| 8062 | if (wback) |
| 8063 | { |
| 8064 | context.type = eContextAdjustBaseRegister; |
| 8065 | if (increment) |
| 8066 | { |
| 8067 | context.SetOffset (8); |
| 8068 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, Rn + 8)) |
| 8069 | return false; |
| 8070 | } |
| 8071 | else |
| 8072 | { |
| 8073 | context.SetOffset (-8); |
| 8074 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, Rn - 8)) |
| 8075 | return false; |
| 8076 | } |
| 8077 | } // if wback |
| 8078 | } |
| 8079 | } // if ConditionPassed() |
| 8080 | return true; |
| 8081 | } |
Caroline Tice | 11555f2 | 2011-03-03 18:48:58 +0000 | [diff] [blame] | 8082 | |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8083 | // Bitwise Exclusive OR (immediate) performs a bitwise exclusive OR of a register value and an immediate value, |
| 8084 | // and writes the result to the destination register. It can optionally update the condition flags based on |
| 8085 | // the result. |
| 8086 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8087 | EmulateInstructionARM::EmulateEORImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8088 | { |
| 8089 | #if 0 |
| 8090 | // ARM pseudo code... |
| 8091 | if ConditionPassed() then |
| 8092 | EncodingSpecificOperations(); |
| 8093 | result = R[n] EOR imm32; |
| 8094 | if d == 15 then // Can only occur for ARM encoding |
| 8095 | ALUWritePC(result); // setflags is always FALSE here |
| 8096 | else |
| 8097 | R[d] = result; |
| 8098 | if setflags then |
| 8099 | APSR.N = result<31>; |
| 8100 | APSR.Z = IsZeroBit(result); |
| 8101 | APSR.C = carry; |
| 8102 | // APSR.V unchanged |
| 8103 | #endif |
| 8104 | |
| 8105 | bool success = false; |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8106 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8107 | if (ConditionPassed(opcode)) |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8108 | { |
| 8109 | uint32_t Rd, Rn; |
| 8110 | uint32_t imm32; // the immediate value to be ORed to the value obtained from Rn |
| 8111 | bool setflags; |
| 8112 | uint32_t carry; // the carry bit after ARM/Thumb Expand operation |
| 8113 | switch (encoding) |
| 8114 | { |
| 8115 | case eEncodingT1: |
| 8116 | Rd = Bits32(opcode, 11, 8); |
| 8117 | Rn = Bits32(opcode, 19, 16); |
| 8118 | setflags = BitIsSet(opcode, 20); |
| 8119 | imm32 = ThumbExpandImm_C(opcode, APSR_C, carry); // (imm32, carry) = ThumbExpandImm(i:imm3:imm8, APSR.C) |
| 8120 | // if Rd == '1111' && S == '1' then SEE TEQ (immediate); |
| 8121 | if (Rd == 15 && setflags) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8122 | return EmulateTEQImm (opcode, eEncodingT1); |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8123 | if (Rd == 13 || (Rd == 15 && !setflags) || BadReg(Rn)) |
| 8124 | return false; |
| 8125 | break; |
| 8126 | case eEncodingA1: |
| 8127 | Rd = Bits32(opcode, 15, 12); |
| 8128 | Rn = Bits32(opcode, 19, 16); |
| 8129 | setflags = BitIsSet(opcode, 20); |
| 8130 | 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] | 8131 | |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8132 | // 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] | 8133 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8134 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8135 | break; |
| 8136 | default: |
| 8137 | return false; |
| 8138 | } |
| 8139 | |
| 8140 | // Read the first operand. |
| 8141 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 8142 | if (!success) |
| 8143 | return false; |
| 8144 | |
| 8145 | uint32_t result = val1 ^ imm32; |
| 8146 | |
| 8147 | EmulateInstruction::Context context; |
| 8148 | context.type = EmulateInstruction::eContextImmediate; |
| 8149 | context.SetNoArgs (); |
| 8150 | |
| 8151 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
| 8152 | return false; |
| 8153 | } |
| 8154 | return true; |
| 8155 | } |
| 8156 | |
| 8157 | // Bitwise Exclusive OR (register) performs a bitwise exclusive OR of a register value and an |
| 8158 | // optionally-shifted register value, and writes the result to the destination register. |
| 8159 | // It can optionally update the condition flags based on the result. |
| 8160 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8161 | EmulateInstructionARM::EmulateEORReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8162 | { |
| 8163 | #if 0 |
| 8164 | // ARM pseudo code... |
| 8165 | if ConditionPassed() then |
| 8166 | EncodingSpecificOperations(); |
| 8167 | (shifted, carry) = Shift_C(R[m], shift_t, shift_n, APSR.C); |
| 8168 | result = R[n] EOR shifted; |
| 8169 | if d == 15 then // Can only occur for ARM encoding |
| 8170 | ALUWritePC(result); // setflags is always FALSE here |
| 8171 | else |
| 8172 | R[d] = result; |
| 8173 | if setflags then |
| 8174 | APSR.N = result<31>; |
| 8175 | APSR.Z = IsZeroBit(result); |
| 8176 | APSR.C = carry; |
| 8177 | // APSR.V unchanged |
| 8178 | #endif |
| 8179 | |
| 8180 | bool success = false; |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8181 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8182 | if (ConditionPassed(opcode)) |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8183 | { |
| 8184 | uint32_t Rd, Rn, Rm; |
| 8185 | ARM_ShifterType shift_t; |
| 8186 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 8187 | bool setflags; |
| 8188 | uint32_t carry; |
| 8189 | switch (encoding) |
| 8190 | { |
| 8191 | case eEncodingT1: |
| 8192 | Rd = Rn = Bits32(opcode, 2, 0); |
| 8193 | Rm = Bits32(opcode, 5, 3); |
| 8194 | setflags = !InITBlock(); |
| 8195 | shift_t = SRType_LSL; |
| 8196 | shift_n = 0; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8197 | break; |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8198 | case eEncodingT2: |
| 8199 | Rd = Bits32(opcode, 11, 8); |
| 8200 | Rn = Bits32(opcode, 19, 16); |
| 8201 | Rm = Bits32(opcode, 3, 0); |
| 8202 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 8203 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
| 8204 | // if Rd == '1111' && S == '1' then SEE TEQ (register); |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8205 | if (Rd == 15 && setflags) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8206 | return EmulateTEQReg (opcode, eEncodingT1); |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8207 | if (Rd == 13 || (Rd == 15 && !setflags) || BadReg(Rn) || BadReg(Rm)) |
| 8208 | return false; |
| 8209 | break; |
| 8210 | case eEncodingA1: |
| 8211 | Rd = Bits32(opcode, 15, 12); |
| 8212 | Rn = Bits32(opcode, 19, 16); |
| 8213 | Rm = Bits32(opcode, 3, 0); |
| 8214 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 8215 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8216 | |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8217 | // 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] | 8218 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8219 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8220 | break; |
| 8221 | default: |
| 8222 | return false; |
| 8223 | } |
| 8224 | |
| 8225 | // Read the first operand. |
| 8226 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 8227 | if (!success) |
| 8228 | return false; |
| 8229 | |
| 8230 | // Read the second operand. |
| 8231 | uint32_t val2 = ReadCoreReg(Rm, &success); |
| 8232 | if (!success) |
| 8233 | return false; |
| 8234 | |
| 8235 | uint32_t shifted = Shift_C(val2, shift_t, shift_n, APSR_C, carry); |
| 8236 | uint32_t result = val1 ^ shifted; |
| 8237 | |
| 8238 | EmulateInstruction::Context context; |
| 8239 | context.type = EmulateInstruction::eContextImmediate; |
| 8240 | context.SetNoArgs (); |
| 8241 | |
| 8242 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
| 8243 | return false; |
| 8244 | } |
| 8245 | return true; |
| 8246 | } |
| 8247 | |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8248 | // Bitwise OR (immediate) performs a bitwise (inclusive) OR of a register value and an immediate value, and |
| 8249 | // writes the result to the destination register. It can optionally update the condition flags based |
| 8250 | // on the result. |
| 8251 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8252 | EmulateInstructionARM::EmulateORRImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8253 | { |
| 8254 | #if 0 |
| 8255 | // ARM pseudo code... |
| 8256 | if ConditionPassed() then |
| 8257 | EncodingSpecificOperations(); |
| 8258 | result = R[n] OR imm32; |
| 8259 | if d == 15 then // Can only occur for ARM encoding |
| 8260 | ALUWritePC(result); // setflags is always FALSE here |
| 8261 | else |
| 8262 | R[d] = result; |
| 8263 | if setflags then |
| 8264 | APSR.N = result<31>; |
| 8265 | APSR.Z = IsZeroBit(result); |
| 8266 | APSR.C = carry; |
| 8267 | // APSR.V unchanged |
| 8268 | #endif |
| 8269 | |
| 8270 | bool success = false; |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8271 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8272 | if (ConditionPassed(opcode)) |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8273 | { |
| 8274 | uint32_t Rd, Rn; |
| 8275 | uint32_t imm32; // the immediate value to be ORed to the value obtained from Rn |
| 8276 | bool setflags; |
| 8277 | uint32_t carry; // the carry bit after ARM/Thumb Expand operation |
| 8278 | switch (encoding) |
| 8279 | { |
| 8280 | case eEncodingT1: |
| 8281 | Rd = Bits32(opcode, 11, 8); |
| 8282 | Rn = Bits32(opcode, 19, 16); |
| 8283 | setflags = BitIsSet(opcode, 20); |
| 8284 | 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] | 8285 | // if Rn == '1111' then SEE MOV (immediate); |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8286 | if (Rn == 15) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8287 | return EmulateMOVRdImm (opcode, eEncodingT2); |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8288 | if (BadReg(Rd) || Rn == 13) |
| 8289 | return false; |
| 8290 | break; |
| 8291 | case eEncodingA1: |
| 8292 | Rd = Bits32(opcode, 15, 12); |
| 8293 | Rn = Bits32(opcode, 19, 16); |
| 8294 | setflags = BitIsSet(opcode, 20); |
| 8295 | 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] | 8296 | |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8297 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8298 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8299 | break; |
| 8300 | default: |
| 8301 | return false; |
| 8302 | } |
| 8303 | |
| 8304 | // Read the first operand. |
| 8305 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 8306 | if (!success) |
| 8307 | return false; |
| 8308 | |
| 8309 | uint32_t result = val1 | imm32; |
| 8310 | |
| 8311 | EmulateInstruction::Context context; |
| 8312 | context.type = EmulateInstruction::eContextImmediate; |
| 8313 | context.SetNoArgs (); |
| 8314 | |
| 8315 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
| 8316 | return false; |
| 8317 | } |
| 8318 | return true; |
| 8319 | } |
| 8320 | |
| 8321 | // Bitwise OR (register) performs a bitwise (inclusive) OR of a register value and an optionally-shifted register |
| 8322 | // value, and writes the result to the destination register. It can optionally update the condition flags based |
| 8323 | // on the result. |
| 8324 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8325 | EmulateInstructionARM::EmulateORRReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8326 | { |
| 8327 | #if 0 |
| 8328 | // ARM pseudo code... |
| 8329 | if ConditionPassed() then |
| 8330 | EncodingSpecificOperations(); |
| 8331 | (shifted, carry) = Shift_C(R[m], shift_t, shift_n, APSR.C); |
| 8332 | result = R[n] OR shifted; |
| 8333 | if d == 15 then // Can only occur for ARM encoding |
| 8334 | ALUWritePC(result); // setflags is always FALSE here |
| 8335 | else |
| 8336 | R[d] = result; |
| 8337 | if setflags then |
| 8338 | APSR.N = result<31>; |
| 8339 | APSR.Z = IsZeroBit(result); |
| 8340 | APSR.C = carry; |
| 8341 | // APSR.V unchanged |
| 8342 | #endif |
| 8343 | |
| 8344 | bool success = false; |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8345 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8346 | if (ConditionPassed(opcode)) |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8347 | { |
| 8348 | uint32_t Rd, Rn, Rm; |
| 8349 | ARM_ShifterType shift_t; |
| 8350 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 8351 | bool setflags; |
| 8352 | uint32_t carry; |
| 8353 | switch (encoding) |
| 8354 | { |
| 8355 | case eEncodingT1: |
| 8356 | Rd = Rn = Bits32(opcode, 2, 0); |
| 8357 | Rm = Bits32(opcode, 5, 3); |
| 8358 | setflags = !InITBlock(); |
| 8359 | shift_t = SRType_LSL; |
| 8360 | shift_n = 0; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8361 | break; |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8362 | case eEncodingT2: |
| 8363 | Rd = Bits32(opcode, 11, 8); |
| 8364 | Rn = Bits32(opcode, 19, 16); |
| 8365 | Rm = Bits32(opcode, 3, 0); |
| 8366 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 8367 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
| 8368 | // if Rn == '1111' then SEE MOV (register); |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8369 | if (Rn == 15) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8370 | return EmulateMOVRdRm (opcode, eEncodingT3); |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8371 | if (BadReg(Rd) || Rn == 13 || BadReg(Rm)) |
| 8372 | return false; |
| 8373 | break; |
| 8374 | case eEncodingA1: |
| 8375 | Rd = Bits32(opcode, 15, 12); |
| 8376 | Rn = Bits32(opcode, 19, 16); |
| 8377 | Rm = Bits32(opcode, 3, 0); |
| 8378 | setflags = BitIsSet(opcode, 20); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 8379 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8380 | |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8381 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8382 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8383 | break; |
| 8384 | default: |
| 8385 | return false; |
| 8386 | } |
| 8387 | |
| 8388 | // Read the first operand. |
| 8389 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 8390 | if (!success) |
| 8391 | return false; |
| 8392 | |
| 8393 | // Read the second operand. |
| 8394 | uint32_t val2 = ReadCoreReg(Rm, &success); |
| 8395 | if (!success) |
| 8396 | return false; |
| 8397 | |
| 8398 | uint32_t shifted = Shift_C(val2, shift_t, shift_n, APSR_C, carry); |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8399 | uint32_t result = val1 | shifted; |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 8400 | |
| 8401 | EmulateInstruction::Context context; |
| 8402 | context.type = EmulateInstruction::eContextImmediate; |
| 8403 | context.SetNoArgs (); |
| 8404 | |
| 8405 | if (!WriteCoreRegOptionalFlags(context, result, Rd, setflags, carry)) |
| 8406 | return false; |
| 8407 | } |
| 8408 | return true; |
| 8409 | } |
| 8410 | |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8411 | // Reverse Subtract (immediate) subtracts a register value from an immediate value, and writes the result to |
| 8412 | // the destination register. It can optionally update the condition flags based on the result. |
| 8413 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8414 | EmulateInstructionARM::EmulateRSBImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8415 | { |
| 8416 | #if 0 |
| 8417 | // ARM pseudo code... |
| 8418 | if ConditionPassed() then |
| 8419 | EncodingSpecificOperations(); |
| 8420 | (result, carry, overflow) = AddWithCarry(NOT(R[n]), imm32, '1'); |
| 8421 | if d == 15 then // Can only occur for ARM encoding |
| 8422 | ALUWritePC(result); // setflags is always FALSE here |
| 8423 | else |
| 8424 | R[d] = result; |
| 8425 | if setflags then |
| 8426 | APSR.N = result<31>; |
| 8427 | APSR.Z = IsZeroBit(result); |
| 8428 | APSR.C = carry; |
| 8429 | APSR.V = overflow; |
| 8430 | #endif |
| 8431 | |
| 8432 | bool success = false; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8433 | |
| 8434 | uint32_t Rd; // the destination register |
| 8435 | uint32_t Rn; // the first operand |
| 8436 | bool setflags; |
| 8437 | uint32_t imm32; // the immediate value to be added to the value obtained from Rn |
| 8438 | switch (encoding) { |
| 8439 | case eEncodingT1: |
| 8440 | Rd = Bits32(opcode, 2, 0); |
| 8441 | Rn = Bits32(opcode, 5, 3); |
| 8442 | setflags = !InITBlock(); |
| 8443 | imm32 = 0; |
| 8444 | break; |
| 8445 | case eEncodingT2: |
| 8446 | Rd = Bits32(opcode, 11, 8); |
| 8447 | Rn = Bits32(opcode, 19, 16); |
| 8448 | setflags = BitIsSet(opcode, 20); |
| 8449 | imm32 = ThumbExpandImm(opcode); // imm32 = ThumbExpandImm(i:imm3:imm8) |
| 8450 | if (BadReg(Rd) || BadReg(Rn)) |
| 8451 | return false; |
| 8452 | break; |
| 8453 | case eEncodingA1: |
| 8454 | Rd = Bits32(opcode, 15, 12); |
| 8455 | Rn = Bits32(opcode, 19, 16); |
| 8456 | setflags = BitIsSet(opcode, 20); |
| 8457 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8458 | |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8459 | // 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] | 8460 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8461 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8462 | break; |
| 8463 | default: |
| 8464 | return false; |
| 8465 | } |
| 8466 | // Read the register value from the operand register Rn. |
| 8467 | uint32_t reg_val = ReadCoreReg(Rn, &success); |
| 8468 | if (!success) |
| 8469 | return false; |
| 8470 | |
| 8471 | AddWithCarryResult res = AddWithCarry(~reg_val, imm32, 1); |
| 8472 | |
| 8473 | EmulateInstruction::Context context; |
| 8474 | context.type = EmulateInstruction::eContextImmediate; |
| 8475 | context.SetNoArgs (); |
| 8476 | |
| 8477 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 8478 | return false; |
| 8479 | |
| 8480 | return true; |
| 8481 | } |
| 8482 | |
| 8483 | // Reverse Subtract (register) subtracts a register value from an optionally-shifted register value, and writes the |
| 8484 | // result to the destination register. It can optionally update the condition flags based on the result. |
| 8485 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8486 | EmulateInstructionARM::EmulateRSBReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8487 | { |
| 8488 | #if 0 |
| 8489 | // ARM pseudo code... |
| 8490 | if ConditionPassed() then |
| 8491 | EncodingSpecificOperations(); |
| 8492 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 8493 | (result, carry, overflow) = AddWithCarry(NOT(R[n]), shifted, '1'); |
| 8494 | if d == 15 then // Can only occur for ARM encoding |
| 8495 | ALUWritePC(result); // setflags is always FALSE here |
| 8496 | else |
| 8497 | R[d] = result; |
| 8498 | if setflags then |
| 8499 | APSR.N = result<31>; |
| 8500 | APSR.Z = IsZeroBit(result); |
| 8501 | APSR.C = carry; |
| 8502 | APSR.V = overflow; |
| 8503 | #endif |
| 8504 | |
| 8505 | bool success = false; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8506 | |
| 8507 | uint32_t Rd; // the destination register |
| 8508 | uint32_t Rn; // the first operand |
| 8509 | uint32_t Rm; // the second operand |
| 8510 | bool setflags; |
| 8511 | ARM_ShifterType shift_t; |
| 8512 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 8513 | switch (encoding) { |
| 8514 | case eEncodingT1: |
| 8515 | Rd = Bits32(opcode, 11, 8); |
| 8516 | Rn = Bits32(opcode, 19, 16); |
| 8517 | Rm = Bits32(opcode, 3, 0); |
| 8518 | setflags = BitIsSet(opcode, 20); |
| 8519 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
| 8520 | // if (BadReg(d) || BadReg(m)) then UNPREDICTABLE; |
| 8521 | if (BadReg(Rd) || BadReg(Rn) || BadReg(Rm)) |
| 8522 | return false; |
| 8523 | break; |
| 8524 | case eEncodingA1: |
| 8525 | Rd = Bits32(opcode, 15, 12); |
| 8526 | Rn = Bits32(opcode, 19, 16); |
| 8527 | Rm = Bits32(opcode, 3, 0); |
| 8528 | setflags = BitIsSet(opcode, 20); |
| 8529 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8530 | |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8531 | // 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] | 8532 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8533 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 8534 | break; |
| 8535 | default: |
| 8536 | return false; |
| 8537 | } |
| 8538 | // Read the register value from register Rn. |
| 8539 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 8540 | if (!success) |
| 8541 | return false; |
| 8542 | |
| 8543 | // Read the register value from register Rm. |
| 8544 | uint32_t val2 = ReadCoreReg(Rm, &success); |
| 8545 | if (!success) |
| 8546 | return false; |
| 8547 | |
| 8548 | uint32_t shifted = Shift(val2, shift_t, shift_n, APSR_C); |
| 8549 | AddWithCarryResult res = AddWithCarry(~val1, shifted, 1); |
| 8550 | |
| 8551 | EmulateInstruction::Context context; |
| 8552 | context.type = EmulateInstruction::eContextImmediate; |
| 8553 | context.SetNoArgs(); |
| 8554 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 8555 | return false; |
| 8556 | |
| 8557 | return true; |
| 8558 | } |
| 8559 | |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8560 | // Reverse Subtract with Carry (immediate) subtracts a register value and the value of NOT (Carry flag) from |
| 8561 | // an immediate value, and writes the result to the destination register. It can optionally update the condition |
| 8562 | // flags based on the result. |
| 8563 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8564 | EmulateInstructionARM::EmulateRSCImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8565 | { |
| 8566 | #if 0 |
| 8567 | // ARM pseudo code... |
| 8568 | if ConditionPassed() then |
| 8569 | EncodingSpecificOperations(); |
| 8570 | (result, carry, overflow) = AddWithCarry(NOT(R[n]), imm32, APSR.C); |
| 8571 | if d == 15 then |
| 8572 | ALUWritePC(result); // setflags is always FALSE here |
| 8573 | else |
| 8574 | R[d] = result; |
| 8575 | if setflags then |
| 8576 | APSR.N = result<31>; |
| 8577 | APSR.Z = IsZeroBit(result); |
| 8578 | APSR.C = carry; |
| 8579 | APSR.V = overflow; |
| 8580 | #endif |
| 8581 | |
| 8582 | bool success = false; |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8583 | |
| 8584 | uint32_t Rd; // the destination register |
| 8585 | uint32_t Rn; // the first operand |
| 8586 | bool setflags; |
| 8587 | uint32_t imm32; // the immediate value to be added to the value obtained from Rn |
| 8588 | switch (encoding) { |
| 8589 | case eEncodingA1: |
| 8590 | Rd = Bits32(opcode, 15, 12); |
| 8591 | Rn = Bits32(opcode, 19, 16); |
| 8592 | setflags = BitIsSet(opcode, 20); |
| 8593 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8594 | |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8595 | // 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] | 8596 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8597 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8598 | break; |
| 8599 | default: |
| 8600 | return false; |
| 8601 | } |
| 8602 | // Read the register value from the operand register Rn. |
| 8603 | uint32_t reg_val = ReadCoreReg(Rn, &success); |
| 8604 | if (!success) |
| 8605 | return false; |
| 8606 | |
| 8607 | AddWithCarryResult res = AddWithCarry(~reg_val, imm32, APSR_C); |
| 8608 | |
| 8609 | EmulateInstruction::Context context; |
| 8610 | context.type = EmulateInstruction::eContextImmediate; |
| 8611 | context.SetNoArgs (); |
| 8612 | |
| 8613 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 8614 | return false; |
| 8615 | |
| 8616 | return true; |
| 8617 | } |
| 8618 | |
| 8619 | // Reverse Subtract with Carry (register) subtracts a register value and the value of NOT (Carry flag) from an |
| 8620 | // optionally-shifted register value, and writes the result to the destination register. It can optionally update the |
| 8621 | // condition flags based on the result. |
| 8622 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8623 | EmulateInstructionARM::EmulateRSCReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8624 | { |
| 8625 | #if 0 |
| 8626 | // ARM pseudo code... |
| 8627 | if ConditionPassed() then |
| 8628 | EncodingSpecificOperations(); |
| 8629 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 8630 | (result, carry, overflow) = AddWithCarry(NOT(R[n]), shifted, APSR.C); |
| 8631 | if d == 15 then |
| 8632 | ALUWritePC(result); // setflags is always FALSE here |
| 8633 | else |
| 8634 | R[d] = result; |
| 8635 | if setflags then |
| 8636 | APSR.N = result<31>; |
| 8637 | APSR.Z = IsZeroBit(result); |
| 8638 | APSR.C = carry; |
| 8639 | APSR.V = overflow; |
| 8640 | #endif |
| 8641 | |
| 8642 | bool success = false; |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8643 | |
| 8644 | uint32_t Rd; // the destination register |
| 8645 | uint32_t Rn; // the first operand |
| 8646 | uint32_t Rm; // the second operand |
| 8647 | bool setflags; |
| 8648 | ARM_ShifterType shift_t; |
| 8649 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 8650 | switch (encoding) { |
| 8651 | case eEncodingA1: |
| 8652 | Rd = Bits32(opcode, 15, 12); |
| 8653 | Rn = Bits32(opcode, 19, 16); |
| 8654 | Rm = Bits32(opcode, 3, 0); |
| 8655 | setflags = BitIsSet(opcode, 20); |
| 8656 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8657 | |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8658 | // 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] | 8659 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8660 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 90e607b | 2011-02-23 00:07:09 +0000 | [diff] [blame] | 8661 | break; |
| 8662 | default: |
| 8663 | return false; |
| 8664 | } |
| 8665 | // Read the register value from register Rn. |
| 8666 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 8667 | if (!success) |
| 8668 | return false; |
| 8669 | |
| 8670 | // Read the register value from register Rm. |
| 8671 | uint32_t val2 = ReadCoreReg(Rm, &success); |
| 8672 | if (!success) |
| 8673 | return false; |
| 8674 | |
| 8675 | uint32_t shifted = Shift(val2, shift_t, shift_n, APSR_C); |
| 8676 | AddWithCarryResult res = AddWithCarry(~val1, shifted, APSR_C); |
| 8677 | |
| 8678 | EmulateInstruction::Context context; |
| 8679 | context.type = EmulateInstruction::eContextImmediate; |
| 8680 | context.SetNoArgs(); |
| 8681 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 8682 | return false; |
| 8683 | |
| 8684 | return true; |
| 8685 | } |
| 8686 | |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8687 | // Subtract with Carry (immediate) subtracts an immediate value and the value of |
| 8688 | // NOT (Carry flag) from a register value, and writes the result to the destination register. |
| 8689 | // It can optionally update the condition flags based on the result. |
| 8690 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8691 | EmulateInstructionARM::EmulateSBCImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8692 | { |
| 8693 | #if 0 |
| 8694 | // ARM pseudo code... |
| 8695 | if ConditionPassed() then |
| 8696 | EncodingSpecificOperations(); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8697 | (result, carry, overflow) = AddWithCarry(R[n], NOT(imm32), APSR.C); |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8698 | if d == 15 then // Can only occur for ARM encoding |
| 8699 | ALUWritePC(result); // setflags is always FALSE here |
| 8700 | else |
| 8701 | R[d] = result; |
| 8702 | if setflags then |
| 8703 | APSR.N = result<31>; |
| 8704 | APSR.Z = IsZeroBit(result); |
| 8705 | APSR.C = carry; |
| 8706 | APSR.V = overflow; |
| 8707 | #endif |
| 8708 | |
| 8709 | bool success = false; |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8710 | |
| 8711 | uint32_t Rd; // the destination register |
| 8712 | uint32_t Rn; // the first operand |
| 8713 | bool setflags; |
| 8714 | uint32_t imm32; // the immediate value to be added to the value obtained from Rn |
| 8715 | switch (encoding) { |
| 8716 | case eEncodingT1: |
| 8717 | Rd = Bits32(opcode, 11, 8); |
| 8718 | Rn = Bits32(opcode, 19, 16); |
| 8719 | setflags = BitIsSet(opcode, 20); |
| 8720 | imm32 = ThumbExpandImm(opcode); // imm32 = ThumbExpandImm(i:imm3:imm8) |
| 8721 | if (BadReg(Rd) || BadReg(Rn)) |
| 8722 | return false; |
| 8723 | break; |
| 8724 | case eEncodingA1: |
| 8725 | Rd = Bits32(opcode, 15, 12); |
| 8726 | Rn = Bits32(opcode, 19, 16); |
| 8727 | setflags = BitIsSet(opcode, 20); |
| 8728 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8729 | |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8730 | // 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] | 8731 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8732 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8733 | break; |
| 8734 | default: |
| 8735 | return false; |
| 8736 | } |
| 8737 | // Read the register value from the operand register Rn. |
| 8738 | uint32_t reg_val = ReadCoreReg(Rn, &success); |
| 8739 | if (!success) |
| 8740 | return false; |
| 8741 | |
| 8742 | AddWithCarryResult res = AddWithCarry(reg_val, ~imm32, APSR_C); |
| 8743 | |
| 8744 | EmulateInstruction::Context context; |
| 8745 | context.type = EmulateInstruction::eContextImmediate; |
| 8746 | context.SetNoArgs (); |
| 8747 | |
| 8748 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 8749 | return false; |
| 8750 | |
| 8751 | return true; |
| 8752 | } |
| 8753 | |
| 8754 | // Subtract with Carry (register) subtracts an optionally-shifted register value and the value of |
| 8755 | // NOT (Carry flag) from a register value, and writes the result to the destination register. |
| 8756 | // It can optionally update the condition flags based on the result. |
| 8757 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8758 | EmulateInstructionARM::EmulateSBCReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8759 | { |
| 8760 | #if 0 |
| 8761 | // ARM pseudo code... |
| 8762 | if ConditionPassed() then |
| 8763 | EncodingSpecificOperations(); |
| 8764 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 8765 | (result, carry, overflow) = AddWithCarry(R[n], NOT(shifted), APSR.C); |
| 8766 | if d == 15 then // Can only occur for ARM encoding |
| 8767 | ALUWritePC(result); // setflags is always FALSE here |
| 8768 | else |
| 8769 | R[d] = result; |
| 8770 | if setflags then |
| 8771 | APSR.N = result<31>; |
| 8772 | APSR.Z = IsZeroBit(result); |
| 8773 | APSR.C = carry; |
| 8774 | APSR.V = overflow; |
| 8775 | #endif |
| 8776 | |
| 8777 | bool success = false; |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8778 | |
| 8779 | uint32_t Rd; // the destination register |
| 8780 | uint32_t Rn; // the first operand |
| 8781 | uint32_t Rm; // the second operand |
| 8782 | bool setflags; |
| 8783 | ARM_ShifterType shift_t; |
| 8784 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 8785 | switch (encoding) { |
| 8786 | case eEncodingT1: |
| 8787 | Rd = Rn = Bits32(opcode, 2, 0); |
| 8788 | Rm = Bits32(opcode, 5, 3); |
| 8789 | setflags = !InITBlock(); |
| 8790 | shift_t = SRType_LSL; |
| 8791 | shift_n = 0; |
| 8792 | break; |
| 8793 | case eEncodingT2: |
| 8794 | Rd = Bits32(opcode, 11, 8); |
| 8795 | Rn = Bits32(opcode, 19, 16); |
| 8796 | Rm = Bits32(opcode, 3, 0); |
| 8797 | setflags = BitIsSet(opcode, 20); |
| 8798 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
| 8799 | if (BadReg(Rd) || BadReg(Rn) || BadReg(Rm)) |
| 8800 | return false; |
| 8801 | break; |
| 8802 | case eEncodingA1: |
| 8803 | Rd = Bits32(opcode, 15, 12); |
| 8804 | Rn = Bits32(opcode, 19, 16); |
| 8805 | Rm = Bits32(opcode, 3, 0); |
| 8806 | setflags = BitIsSet(opcode, 20); |
| 8807 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8808 | |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8809 | // 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] | 8810 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8811 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 9b38177 | 2011-02-23 01:01:21 +0000 | [diff] [blame] | 8812 | break; |
| 8813 | default: |
| 8814 | return false; |
| 8815 | } |
| 8816 | // Read the register value from register Rn. |
| 8817 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 8818 | if (!success) |
| 8819 | return false; |
| 8820 | |
| 8821 | // Read the register value from register Rm. |
| 8822 | uint32_t val2 = ReadCoreReg(Rm, &success); |
| 8823 | if (!success) |
| 8824 | return false; |
| 8825 | |
| 8826 | uint32_t shifted = Shift(val2, shift_t, shift_n, APSR_C); |
| 8827 | AddWithCarryResult res = AddWithCarry(val1, ~shifted, APSR_C); |
| 8828 | |
| 8829 | EmulateInstruction::Context context; |
| 8830 | context.type = EmulateInstruction::eContextImmediate; |
| 8831 | context.SetNoArgs(); |
| 8832 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 8833 | return false; |
| 8834 | |
| 8835 | return true; |
| 8836 | } |
| 8837 | |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8838 | // This instruction subtracts an immediate value from a register value, and writes the result |
| 8839 | // to the destination register. It can optionally update the condition flags based on the result. |
| 8840 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8841 | EmulateInstructionARM::EmulateSUBImmThumb (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8842 | { |
| 8843 | #if 0 |
| 8844 | // ARM pseudo code... |
| 8845 | if ConditionPassed() then |
| 8846 | EncodingSpecificOperations(); |
| 8847 | (result, carry, overflow) = AddWithCarry(R[n], NOT(imm32), '1'); |
| 8848 | R[d] = result; |
| 8849 | if setflags then |
| 8850 | APSR.N = result<31>; |
| 8851 | APSR.Z = IsZeroBit(result); |
| 8852 | APSR.C = carry; |
| 8853 | APSR.V = overflow; |
| 8854 | #endif |
| 8855 | |
| 8856 | bool success = false; |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8857 | |
| 8858 | uint32_t Rd; // the destination register |
| 8859 | uint32_t Rn; // the first operand |
| 8860 | bool setflags; |
| 8861 | uint32_t imm32; // the immediate value to be subtracted from the value obtained from Rn |
| 8862 | switch (encoding) { |
| 8863 | case eEncodingT1: |
| 8864 | Rd = Bits32(opcode, 2, 0); |
| 8865 | Rn = Bits32(opcode, 5, 3); |
| 8866 | setflags = !InITBlock(); |
| 8867 | imm32 = Bits32(opcode, 8, 6); // imm32 = ZeroExtend(imm3, 32) |
| 8868 | break; |
| 8869 | case eEncodingT2: |
| 8870 | Rd = Rn = Bits32(opcode, 10, 8); |
| 8871 | setflags = !InITBlock(); |
| 8872 | imm32 = Bits32(opcode, 7, 0); // imm32 = ZeroExtend(imm8, 32) |
| 8873 | break; |
| 8874 | case eEncodingT3: |
| 8875 | Rd = Bits32(opcode, 11, 8); |
| 8876 | Rn = Bits32(opcode, 19, 16); |
| 8877 | setflags = BitIsSet(opcode, 20); |
| 8878 | imm32 = ThumbExpandImm(opcode); // imm32 = ThumbExpandImm(i:imm3:imm8) |
| 8879 | |
| 8880 | // if Rd == '1111' && S == '1' then SEE CMP (immediate); |
| 8881 | if (Rd == 15 && setflags) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8882 | return EmulateCMPImm (opcode, eEncodingT2); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8883 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 8884 | // if Rn == '1101' then SEE SUB (SP minus immediate); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8885 | if (Rn == 13) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8886 | return EmulateSUBSPImm (opcode, eEncodingT2); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8887 | |
| 8888 | // if d == 13 || (d == 15 && S == '0') || n == 15 then UNPREDICTABLE; |
| 8889 | if (Rd == 13 || (Rd == 15 && !setflags) || Rn == 15) |
| 8890 | return false; |
| 8891 | break; |
| 8892 | case eEncodingT4: |
| 8893 | Rd = Bits32(opcode, 11, 8); |
| 8894 | Rn = Bits32(opcode, 19, 16); |
| 8895 | setflags = BitIsSet(opcode, 20); |
| 8896 | imm32 = ThumbImm12(opcode); // imm32 = ZeroExtend(i:imm3:imm8, 32) |
| 8897 | |
| 8898 | // if Rn == '1111' then SEE ADR; |
| 8899 | if (Rn == 15) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8900 | return EmulateADR (opcode, eEncodingT2); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8901 | |
| 8902 | // if Rn == '1101' then SEE SUB (SP minus immediate); |
| 8903 | if (Rn == 13) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8904 | return EmulateSUBSPImm (opcode, eEncodingT3); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8905 | |
| 8906 | if (BadReg(Rd)) |
| 8907 | return false; |
| 8908 | break; |
| 8909 | default: |
| 8910 | return false; |
| 8911 | } |
| 8912 | // Read the register value from the operand register Rn. |
| 8913 | uint32_t reg_val = ReadCoreReg(Rn, &success); |
| 8914 | if (!success) |
| 8915 | return false; |
| 8916 | |
| 8917 | AddWithCarryResult res = AddWithCarry(reg_val, ~imm32, 1); |
| 8918 | |
| 8919 | EmulateInstruction::Context context; |
| 8920 | context.type = EmulateInstruction::eContextImmediate; |
| 8921 | context.SetNoArgs (); |
| 8922 | |
| 8923 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 8924 | return false; |
| 8925 | |
| 8926 | return true; |
| 8927 | } |
| 8928 | |
| 8929 | // This instruction subtracts an immediate value from a register value, and writes the result |
| 8930 | // to the destination register. It can optionally update the condition flags based on the result. |
| 8931 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8932 | EmulateInstructionARM::EmulateSUBImmARM (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8933 | { |
| 8934 | #if 0 |
| 8935 | // ARM pseudo code... |
| 8936 | if ConditionPassed() then |
| 8937 | EncodingSpecificOperations(); |
| 8938 | (result, carry, overflow) = AddWithCarry(R[n], NOT(imm32), '1'); |
| 8939 | if d == 15 then |
| 8940 | ALUWritePC(result); // setflags is always FALSE here |
| 8941 | else |
| 8942 | R[d] = result; |
| 8943 | if setflags then |
| 8944 | APSR.N = result<31>; |
| 8945 | APSR.Z = IsZeroBit(result); |
| 8946 | APSR.C = carry; |
| 8947 | APSR.V = overflow; |
| 8948 | #endif |
| 8949 | |
| 8950 | bool success = false; |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8951 | |
| 8952 | uint32_t Rd; // the destination register |
| 8953 | uint32_t Rn; // the first operand |
| 8954 | bool setflags; |
| 8955 | uint32_t imm32; // the immediate value to be subtracted from the value obtained from Rn |
| 8956 | switch (encoding) { |
| 8957 | case eEncodingA1: |
| 8958 | Rd = Bits32(opcode, 15, 12); |
| 8959 | Rn = Bits32(opcode, 19, 16); |
| 8960 | setflags = BitIsSet(opcode, 20); |
| 8961 | imm32 = ARMExpandImm(opcode); // imm32 = ARMExpandImm(imm12) |
| 8962 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 8963 | // if Rn == '1111' && S == '0' then SEE ADR; |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8964 | if (Rn == 15 && !setflags) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8965 | return EmulateADR (opcode, eEncodingA2); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8966 | |
Caroline Tice | bb48f0b | 2011-03-28 16:10:45 +0000 | [diff] [blame] | 8967 | // if Rn == '1101' then SEE SUB (SP minus immediate); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8968 | if (Rn == 13) |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8969 | return EmulateSUBSPImm (opcode, eEncodingA1); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8970 | |
| 8971 | // 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] | 8972 | if (Rd == 15 && setflags) |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 8973 | return EmulateSUBSPcLrEtc (opcode, encoding); |
Johnny Chen | 15a7a6b | 2011-02-23 23:47:56 +0000 | [diff] [blame] | 8974 | break; |
| 8975 | default: |
| 8976 | return false; |
| 8977 | } |
| 8978 | // Read the register value from the operand register Rn. |
| 8979 | uint32_t reg_val = ReadCoreReg(Rn, &success); |
| 8980 | if (!success) |
| 8981 | return false; |
| 8982 | |
| 8983 | AddWithCarryResult res = AddWithCarry(reg_val, ~imm32, 1); |
| 8984 | |
| 8985 | EmulateInstruction::Context context; |
| 8986 | context.type = EmulateInstruction::eContextImmediate; |
| 8987 | context.SetNoArgs (); |
| 8988 | |
| 8989 | if (!WriteCoreRegOptionalFlags(context, res.result, Rd, setflags, res.carry_out, res.overflow)) |
| 8990 | return false; |
| 8991 | |
| 8992 | return true; |
| 8993 | } |
| 8994 | |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8995 | // Test Equivalence (immediate) performs a bitwise exclusive OR operation on a register value and an |
| 8996 | // immediate value. It updates the condition flags based on the result, and discards the result. |
| 8997 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 8998 | EmulateInstructionARM::EmulateTEQImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 8999 | { |
| 9000 | #if 0 |
| 9001 | // ARM pseudo code... |
| 9002 | if ConditionPassed() then |
| 9003 | EncodingSpecificOperations(); |
| 9004 | result = R[n] EOR imm32; |
| 9005 | APSR.N = result<31>; |
| 9006 | APSR.Z = IsZeroBit(result); |
| 9007 | APSR.C = carry; |
| 9008 | // APSR.V unchanged |
| 9009 | #endif |
| 9010 | |
| 9011 | bool success = false; |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9012 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9013 | if (ConditionPassed(opcode)) |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9014 | { |
| 9015 | uint32_t Rn; |
| 9016 | uint32_t imm32; // the immediate value to be ANDed to the value obtained from Rn |
| 9017 | uint32_t carry; // the carry bit after ARM/Thumb Expand operation |
| 9018 | switch (encoding) |
| 9019 | { |
| 9020 | case eEncodingT1: |
| 9021 | Rn = Bits32(opcode, 19, 16); |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9022 | 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] | 9023 | if (BadReg(Rn)) |
| 9024 | return false; |
| 9025 | break; |
| 9026 | case eEncodingA1: |
| 9027 | Rn = Bits32(opcode, 19, 16); |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9028 | 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] | 9029 | break; |
| 9030 | default: |
| 9031 | return false; |
| 9032 | } |
| 9033 | |
| 9034 | // Read the first operand. |
| 9035 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 9036 | if (!success) |
| 9037 | return false; |
| 9038 | |
| 9039 | uint32_t result = val1 ^ imm32; |
| 9040 | |
| 9041 | EmulateInstruction::Context context; |
| 9042 | context.type = EmulateInstruction::eContextImmediate; |
| 9043 | context.SetNoArgs (); |
| 9044 | |
| 9045 | if (!WriteFlags(context, result, carry)) |
| 9046 | return false; |
| 9047 | } |
| 9048 | return true; |
| 9049 | } |
| 9050 | |
| 9051 | // Test Equivalence (register) performs a bitwise exclusive OR operation on a register value and an |
| 9052 | // optionally-shifted register value. It updates the condition flags based on the result, and discards |
| 9053 | // the result. |
| 9054 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9055 | EmulateInstructionARM::EmulateTEQReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9056 | { |
| 9057 | #if 0 |
| 9058 | // ARM pseudo code... |
| 9059 | if ConditionPassed() then |
| 9060 | EncodingSpecificOperations(); |
| 9061 | (shifted, carry) = Shift_C(R[m], shift_t, shift_n, APSR.C); |
| 9062 | result = R[n] EOR shifted; |
| 9063 | APSR.N = result<31>; |
| 9064 | APSR.Z = IsZeroBit(result); |
| 9065 | APSR.C = carry; |
| 9066 | // APSR.V unchanged |
| 9067 | #endif |
| 9068 | |
| 9069 | bool success = false; |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9070 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9071 | if (ConditionPassed(opcode)) |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9072 | { |
| 9073 | uint32_t Rn, Rm; |
| 9074 | ARM_ShifterType shift_t; |
| 9075 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 9076 | uint32_t carry; |
| 9077 | switch (encoding) |
| 9078 | { |
| 9079 | case eEncodingT1: |
| 9080 | Rn = Bits32(opcode, 19, 16); |
| 9081 | Rm = Bits32(opcode, 3, 0); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 9082 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9083 | if (BadReg(Rn) || BadReg(Rm)) |
| 9084 | return false; |
| 9085 | break; |
| 9086 | case eEncodingA1: |
| 9087 | Rn = Bits32(opcode, 19, 16); |
| 9088 | Rm = Bits32(opcode, 3, 0); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 9089 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Johnny Chen | 2115b41 | 2011-02-21 23:42:44 +0000 | [diff] [blame] | 9090 | break; |
| 9091 | default: |
| 9092 | return false; |
| 9093 | } |
| 9094 | |
| 9095 | // Read the first operand. |
| 9096 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 9097 | if (!success) |
| 9098 | return false; |
| 9099 | |
| 9100 | // Read the second operand. |
| 9101 | uint32_t val2 = ReadCoreReg(Rm, &success); |
| 9102 | if (!success) |
| 9103 | return false; |
| 9104 | |
| 9105 | uint32_t shifted = Shift_C(val2, shift_t, shift_n, APSR_C, carry); |
| 9106 | uint32_t result = val1 ^ shifted; |
| 9107 | |
| 9108 | EmulateInstruction::Context context; |
| 9109 | context.type = EmulateInstruction::eContextImmediate; |
| 9110 | context.SetNoArgs (); |
| 9111 | |
| 9112 | if (!WriteFlags(context, result, carry)) |
| 9113 | return false; |
| 9114 | } |
| 9115 | return true; |
| 9116 | } |
| 9117 | |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9118 | // Test (immediate) performs a bitwise AND operation on a register value and an immediate value. |
| 9119 | // It updates the condition flags based on the result, and discards the result. |
| 9120 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9121 | EmulateInstructionARM::EmulateTSTImm (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9122 | { |
| 9123 | #if 0 |
| 9124 | // ARM pseudo code... |
| 9125 | if ConditionPassed() then |
| 9126 | EncodingSpecificOperations(); |
| 9127 | result = R[n] AND imm32; |
| 9128 | APSR.N = result<31>; |
| 9129 | APSR.Z = IsZeroBit(result); |
| 9130 | APSR.C = carry; |
| 9131 | // APSR.V unchanged |
| 9132 | #endif |
| 9133 | |
| 9134 | bool success = false; |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9135 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9136 | if (ConditionPassed(opcode)) |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9137 | { |
| 9138 | uint32_t Rn; |
| 9139 | uint32_t imm32; // the immediate value to be ANDed to the value obtained from Rn |
| 9140 | uint32_t carry; // the carry bit after ARM/Thumb Expand operation |
| 9141 | switch (encoding) |
| 9142 | { |
| 9143 | case eEncodingT1: |
| 9144 | Rn = Bits32(opcode, 19, 16); |
| 9145 | imm32 = ThumbExpandImm_C(opcode, APSR_C, carry); // (imm32, carry) = ThumbExpandImm(i:imm3:imm8, APSR.C) |
| 9146 | if (BadReg(Rn)) |
| 9147 | return false; |
| 9148 | break; |
| 9149 | case eEncodingA1: |
| 9150 | Rn = Bits32(opcode, 19, 16); |
| 9151 | imm32 = ARMExpandImm_C(opcode, APSR_C, carry); // (imm32, carry) = ARMExpandImm(imm12, APSR.C) |
| 9152 | break; |
| 9153 | default: |
| 9154 | return false; |
| 9155 | } |
| 9156 | |
| 9157 | // Read the first operand. |
| 9158 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 9159 | if (!success) |
| 9160 | return false; |
| 9161 | |
| 9162 | uint32_t result = val1 & imm32; |
| 9163 | |
| 9164 | EmulateInstruction::Context context; |
| 9165 | context.type = EmulateInstruction::eContextImmediate; |
| 9166 | context.SetNoArgs (); |
| 9167 | |
| 9168 | if (!WriteFlags(context, result, carry)) |
| 9169 | return false; |
| 9170 | } |
| 9171 | return true; |
| 9172 | } |
| 9173 | |
| 9174 | // Test (register) performs a bitwise AND operation on a register value and an optionally-shifted register value. |
| 9175 | // It updates the condition flags based on the result, and discards the result. |
| 9176 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9177 | EmulateInstructionARM::EmulateTSTReg (const uint32_t opcode, const ARMEncoding encoding) |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9178 | { |
| 9179 | #if 0 |
| 9180 | // ARM pseudo code... |
| 9181 | if ConditionPassed() then |
| 9182 | EncodingSpecificOperations(); |
| 9183 | (shifted, carry) = Shift_C(R[m], shift_t, shift_n, APSR.C); |
| 9184 | result = R[n] AND shifted; |
| 9185 | APSR.N = result<31>; |
| 9186 | APSR.Z = IsZeroBit(result); |
| 9187 | APSR.C = carry; |
| 9188 | // APSR.V unchanged |
| 9189 | #endif |
| 9190 | |
| 9191 | bool success = false; |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9192 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 9193 | if (ConditionPassed(opcode)) |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9194 | { |
| 9195 | uint32_t Rn, Rm; |
| 9196 | ARM_ShifterType shift_t; |
| 9197 | uint32_t shift_n; // the shift applied to the value read from Rm |
| 9198 | uint32_t carry; |
| 9199 | switch (encoding) |
| 9200 | { |
| 9201 | case eEncodingT1: |
| 9202 | Rn = Bits32(opcode, 2, 0); |
| 9203 | Rm = Bits32(opcode, 5, 3); |
| 9204 | shift_t = SRType_LSL; |
| 9205 | shift_n = 0; |
Johnny Chen | ed32e7c | 2011-02-22 23:42:58 +0000 | [diff] [blame] | 9206 | break; |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9207 | case eEncodingT2: |
| 9208 | Rn = Bits32(opcode, 19, 16); |
| 9209 | Rm = Bits32(opcode, 3, 0); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 9210 | shift_n = DecodeImmShiftThumb(opcode, shift_t); |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9211 | if (BadReg(Rn) || BadReg(Rm)) |
| 9212 | return false; |
| 9213 | break; |
| 9214 | case eEncodingA1: |
| 9215 | Rn = Bits32(opcode, 19, 16); |
| 9216 | Rm = Bits32(opcode, 3, 0); |
Johnny Chen | 3dd0605 | 2011-02-22 21:17:52 +0000 | [diff] [blame] | 9217 | shift_n = DecodeImmShiftARM(opcode, shift_t); |
Johnny Chen | de3cce3 | 2011-02-21 21:24:49 +0000 | [diff] [blame] | 9218 | break; |
| 9219 | default: |
| 9220 | return false; |
| 9221 | } |
| 9222 | |
| 9223 | // Read the first operand. |
| 9224 | uint32_t val1 = ReadCoreReg(Rn, &success); |
| 9225 | if (!success) |
| 9226 | return false; |
| 9227 | |
| 9228 | // Read the second operand. |
| 9229 | uint32_t val2 = ReadCoreReg(Rm, &success); |
| 9230 | if (!success) |
| 9231 | return false; |
| 9232 | |
| 9233 | uint32_t shifted = Shift_C(val2, shift_t, shift_n, APSR_C, carry); |
| 9234 | uint32_t result = val1 & shifted; |
| 9235 | |
| 9236 | EmulateInstruction::Context context; |
| 9237 | context.type = EmulateInstruction::eContextImmediate; |
| 9238 | context.SetNoArgs (); |
| 9239 | |
| 9240 | if (!WriteFlags(context, result, carry)) |
| 9241 | return false; |
| 9242 | } |
| 9243 | return true; |
| 9244 | } |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9245 | |
| 9246 | // A8.6.216 SUB (SP minus register) |
| 9247 | bool |
| 9248 | EmulateInstructionARM::EmulateSUBSPReg (const uint32_t opcode, const ARMEncoding encoding) |
| 9249 | { |
| 9250 | #if 0 |
| 9251 | if ConditionPassed() then |
| 9252 | EncodingSpecificOperations(); |
| 9253 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 9254 | (result, carry, overflow) = AddWithCarry(SP, NOT(shifted), ‘1’); |
| 9255 | if d == 15 then // Can only occur for ARM encoding |
| 9256 | ALUWritePC(result); // setflags is always FALSE here |
| 9257 | else |
| 9258 | R[d] = result; |
| 9259 | if setflags then |
| 9260 | APSR.N = result<31>; |
| 9261 | APSR.Z = IsZeroBit(result); |
| 9262 | APSR.C = carry; |
| 9263 | APSR.V = overflow; |
| 9264 | #endif |
| 9265 | |
| 9266 | bool success = false; |
| 9267 | |
| 9268 | if (ConditionPassed(opcode)) |
| 9269 | { |
| 9270 | uint32_t d; |
| 9271 | uint32_t m; |
| 9272 | bool setflags; |
| 9273 | ARM_ShifterType shift_t; |
| 9274 | uint32_t shift_n; |
| 9275 | |
| 9276 | switch (encoding) |
| 9277 | { |
| 9278 | case eEncodingT1: |
| 9279 | // d = UInt(Rd); m = UInt(Rm); setflags = (S == ‘1’); |
| 9280 | d = Bits32 (opcode, 11, 8); |
| 9281 | m = Bits32 (opcode, 3, 0); |
| 9282 | setflags = BitIsSet (opcode, 20); |
| 9283 | |
| 9284 | // (shift_t, shift_n) = DecodeImmShift(type, imm3:imm2); |
| 9285 | shift_n = DecodeImmShiftThumb (opcode, shift_t); |
| 9286 | |
| 9287 | // if d == 13 && (shift_t != SRType_LSL || shift_n > 3) then UNPREDICTABLE; |
| 9288 | if ((d == 13) && ((shift_t != SRType_LSL) || (shift_n > 3))) |
| 9289 | return false; |
| 9290 | |
| 9291 | // if d == 15 || BadReg(m) then UNPREDICTABLE; |
| 9292 | if ((d == 15) || BadReg (m)) |
| 9293 | return false; |
| 9294 | break; |
| 9295 | |
| 9296 | case eEncodingA1: |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9297 | // d = UInt(Rd); m = UInt(Rm); setflags = (S == ‘1’); |
| 9298 | d = Bits32 (opcode, 15, 12); |
| 9299 | m = Bits32 (opcode, 3, 0); |
| 9300 | setflags = BitIsSet (opcode, 20); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 9301 | |
| 9302 | // if Rd == ‘1111’ && S == ‘1’ then SEE SUBS PC, LR and related instructions; |
| 9303 | if (d == 15 && setflags) |
| 9304 | EmulateSUBSPcLrEtc (opcode, encoding); |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9305 | |
| 9306 | // (shift_t, shift_n) = DecodeImmShift(type, imm5); |
| 9307 | shift_n = DecodeImmShiftARM (opcode, shift_t); |
| 9308 | break; |
| 9309 | |
| 9310 | default: |
| 9311 | return false; |
| 9312 | } |
| 9313 | |
| 9314 | // shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 9315 | uint32_t Rm = ReadCoreReg (m, &success); |
| 9316 | if (!success) |
| 9317 | return false; |
| 9318 | |
| 9319 | uint32_t shifted = Shift (Rm, shift_t, shift_n, APSR_C); |
| 9320 | |
| 9321 | // (result, carry, overflow) = AddWithCarry(SP, NOT(shifted), ‘1’); |
| 9322 | uint32_t sp_val = ReadCoreReg (SP_REG, &success); |
| 9323 | if (!success) |
| 9324 | return false; |
| 9325 | |
| 9326 | AddWithCarryResult res = AddWithCarry (sp_val, ~shifted, 1); |
| 9327 | |
| 9328 | EmulateInstruction::Context context; |
| 9329 | context.type = eContextSubtraction; |
| 9330 | Register sp_reg; |
| 9331 | sp_reg.SetRegister (eRegisterKindDWARF, dwarf_sp); |
| 9332 | Register dwarf_reg; |
| 9333 | dwarf_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + m); |
| 9334 | context.SetRegisterRegisterOperands (sp_reg, dwarf_reg); |
| 9335 | |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9336 | 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] | 9337 | return false; |
| 9338 | } |
| 9339 | return true; |
| 9340 | } |
| 9341 | |
| 9342 | |
| 9343 | // A8.6.7 ADD (register-shifted register) |
| 9344 | bool |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 9345 | EmulateInstructionARM::EmulateADDRegShift (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9346 | { |
| 9347 | #if 0 |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 9348 | if ConditionPassed() then |
| 9349 | EncodingSpecificOperations(); |
| 9350 | shift_n = UInt(R[s]<7:0>); |
| 9351 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 9352 | (result, carry, overflow) = AddWithCarry(R[n], shifted, ‘0’); |
| 9353 | R[d] = result; |
| 9354 | if setflags then |
| 9355 | APSR.N = result<31>; |
| 9356 | APSR.Z = IsZeroBit(result); |
| 9357 | APSR.C = carry; |
| 9358 | APSR.V = overflow; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9359 | #endif |
| 9360 | |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 9361 | bool success = false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9362 | |
| 9363 | if (ConditionPassed(opcode)) |
| 9364 | { |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 9365 | uint32_t d; |
| 9366 | uint32_t n; |
| 9367 | uint32_t m; |
| 9368 | uint32_t s; |
| 9369 | bool setflags; |
| 9370 | ARM_ShifterType shift_t; |
| 9371 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9372 | switch (encoding) |
| 9373 | { |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 9374 | case eEncodingA1: |
| 9375 | // d = UInt(Rd); n = UInt(Rn); m = UInt(Rm); s = UInt(Rs); |
| 9376 | d = Bits32 (opcode, 15, 12); |
| 9377 | n = Bits32 (opcode, 19, 16); |
| 9378 | m = Bits32 (opcode, 3, 0); |
| 9379 | s = Bits32 (opcode, 11, 8); |
| 9380 | |
| 9381 | // setflags = (S == ‘1’); shift_t = DecodeRegShift(type); |
| 9382 | setflags = BitIsSet (opcode, 20); |
| 9383 | shift_t = DecodeRegShift (Bits32 (opcode, 6, 5)); |
| 9384 | |
| 9385 | // if d == 15 || n == 15 || m == 15 || s == 15 then UNPREDICTABLE; |
| 9386 | if ((d == 15) || (m == 15) || (m == 15) || (s == 15)) |
| 9387 | return false; |
| 9388 | break; |
| 9389 | |
| 9390 | default: |
| 9391 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9392 | } |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 9393 | |
| 9394 | // shift_n = UInt(R[s]<7:0>); |
| 9395 | uint32_t Rs = ReadCoreReg (s, &success); |
| 9396 | if (!success) |
| 9397 | return false; |
| 9398 | |
| 9399 | uint32_t shift_n = Bits32 (Rs, 7, 0); |
| 9400 | |
| 9401 | // shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 9402 | uint32_t Rm = ReadCoreReg (m, &success); |
| 9403 | if (!success) |
| 9404 | return false; |
| 9405 | |
| 9406 | uint32_t shifted = Shift (Rm, shift_t, shift_n, APSR_C); |
| 9407 | |
| 9408 | // (result, carry, overflow) = AddWithCarry(R[n], shifted, ‘0’); |
| 9409 | uint32_t Rn = ReadCoreReg (n, &success); |
| 9410 | if (!success) |
| 9411 | return false; |
| 9412 | |
| 9413 | AddWithCarryResult res = AddWithCarry (Rn, shifted, 0); |
| 9414 | |
| 9415 | // R[d] = result; |
| 9416 | EmulateInstruction::Context context; |
| 9417 | context.type = eContextAddition; |
| 9418 | Register reg_n; |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 9419 | reg_n.SetRegister (eRegisterKindDWARF, dwarf_r0 +n); |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 9420 | Register reg_m; |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 9421 | reg_m.SetRegister (eRegisterKindDWARF, dwarf_r0 + m); |
Caroline Tice | c08ed38 | 2011-03-29 23:03:16 +0000 | [diff] [blame] | 9422 | |
| 9423 | context.SetRegisterRegisterOperands (reg_n, reg_m); |
| 9424 | |
| 9425 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + d, res.result)) |
| 9426 | return false; |
| 9427 | |
| 9428 | // if setflags then |
| 9429 | // APSR.N = result<31>; |
| 9430 | // APSR.Z = IsZeroBit(result); |
| 9431 | // APSR.C = carry; |
| 9432 | // APSR.V = overflow; |
| 9433 | if (setflags) |
| 9434 | return WriteFlags (context, res.result, res.carry_out, res.overflow); |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9435 | } |
| 9436 | return true; |
| 9437 | } |
| 9438 | |
| 9439 | // A8.6.213 SUB (register) |
| 9440 | bool |
| 9441 | EmulateInstructionARM::EmulateSUBReg (const uint32_t opcode, const ARMEncoding encoding) |
| 9442 | { |
| 9443 | #if 0 |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9444 | if ConditionPassed() then |
| 9445 | EncodingSpecificOperations(); |
| 9446 | shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 9447 | (result, carry, overflow) = AddWithCarry(R[n], NOT(shifted), ‘1’); |
| 9448 | if d == 15 then // Can only occur for ARM encoding |
| 9449 | ALUWritePC(result); // setflags is always FALSE here |
| 9450 | else |
| 9451 | R[d] = result; |
| 9452 | if setflags then |
| 9453 | APSR.N = result<31>; |
| 9454 | APSR.Z = IsZeroBit(result); |
| 9455 | APSR.C = carry; |
| 9456 | APSR.V = overflow; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9457 | #endif |
| 9458 | |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9459 | bool success = false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9460 | |
| 9461 | if (ConditionPassed(opcode)) |
| 9462 | { |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9463 | uint32_t d; |
| 9464 | uint32_t n; |
| 9465 | uint32_t m; |
| 9466 | bool setflags; |
| 9467 | ARM_ShifterType shift_t; |
| 9468 | uint32_t shift_n; |
| 9469 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9470 | switch (encoding) |
| 9471 | { |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9472 | case eEncodingT1: |
| 9473 | // d = UInt(Rd); n = UInt(Rn); m = UInt(Rm); setflags = !InITBlock(); |
| 9474 | d = Bits32 (opcode, 2, 0); |
| 9475 | n = Bits32 (opcode, 5, 3); |
| 9476 | m = Bits32 (opcode, 8, 6); |
| 9477 | setflags = !InITBlock(); |
| 9478 | |
| 9479 | // (shift_t, shift_n) = (SRType_LSL, 0); |
| 9480 | shift_t = SRType_LSL; |
| 9481 | shift_n = 0; |
| 9482 | |
| 9483 | break; |
| 9484 | |
| 9485 | case eEncodingT2: |
| 9486 | // if Rd == ‘1111’ && S == ‘1’ then SEE CMP (register); |
| 9487 | // if Rn == ‘1101’ then SEE SUB (SP minus register); |
| 9488 | // d = UInt(Rd); n = UInt(Rn); m = UInt(Rm); setflags = (S == ‘1’); |
| 9489 | d = Bits32 (opcode, 11, 8); |
| 9490 | n = Bits32 (opcode, 19, 16); |
| 9491 | m = Bits32 (opcode, 3, 0); |
| 9492 | setflags = BitIsSet (opcode, 20); |
| 9493 | |
| 9494 | // (shift_t, shift_n) = DecodeImmShift(type, imm3:imm2); |
| 9495 | shift_n = DecodeImmShiftThumb (opcode, shift_t); |
| 9496 | |
| 9497 | // if d == 13 || (d == 15 && S == '0') || n == 15 || BadReg(m) then UNPREDICTABLE; |
| 9498 | if ((d == 13) || ((d == 15) && BitIsClear (opcode, 20)) || (n == 15) || BadReg (m)) |
| 9499 | return false; |
| 9500 | |
| 9501 | break; |
| 9502 | |
| 9503 | case eEncodingA1: |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9504 | // if Rn == ‘1101’ then SEE SUB (SP minus register); |
| 9505 | // d = UInt(Rd); n = UInt(Rn); m = UInt(Rm); setflags = (S == ‘1’); |
| 9506 | d = Bits32 (opcode, 15, 12); |
| 9507 | n = Bits32 (opcode, 19, 16); |
| 9508 | m = Bits32 (opcode, 3, 0); |
| 9509 | setflags = BitIsSet (opcode, 20); |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 9510 | |
| 9511 | // if Rd == ‘1111’ && S == ‘1’ then SEE SUBS PC, LR and related instructions; |
| 9512 | if ((d == 15) && setflags) |
| 9513 | EmulateSUBSPcLrEtc (opcode, encoding); |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9514 | |
| 9515 | // (shift_t, shift_n) = DecodeImmShift(type, imm5); |
| 9516 | shift_n = DecodeImmShiftARM (opcode, shift_t); |
| 9517 | |
| 9518 | break; |
| 9519 | |
| 9520 | default: |
| 9521 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9522 | } |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9523 | |
| 9524 | // shifted = Shift(R[m], shift_t, shift_n, APSR.C); |
| 9525 | uint32_t Rm = ReadCoreReg (m, &success); |
| 9526 | if (!success) |
| 9527 | return false; |
| 9528 | |
| 9529 | uint32_t shifted = Shift (Rm, shift_t, shift_n, APSR_C); |
| 9530 | |
| 9531 | // (result, carry, overflow) = AddWithCarry(R[n], NOT(shifted), ‘1’); |
| 9532 | uint32_t Rn = ReadCoreReg (n, &success); |
| 9533 | if (!success) |
| 9534 | return false; |
| 9535 | |
| 9536 | AddWithCarryResult res = AddWithCarry (Rn, ~shifted, 1); |
| 9537 | |
| 9538 | // if d == 15 then // Can only occur for ARM encoding |
| 9539 | // ALUWritePC(result); // setflags is always FALSE here |
| 9540 | // else |
| 9541 | // R[d] = result; |
| 9542 | // if setflags then |
| 9543 | // APSR.N = result<31>; |
| 9544 | // APSR.Z = IsZeroBit(result); |
| 9545 | // APSR.C = carry; |
| 9546 | // APSR.V = overflow; |
| 9547 | |
| 9548 | EmulateInstruction::Context context; |
| 9549 | context.type = eContextSubtraction; |
| 9550 | Register reg_n; |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 9551 | reg_n.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9552 | Register reg_m; |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 9553 | reg_m.SetRegister (eRegisterKindDWARF, dwarf_r0 + m); |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9554 | context.SetRegisterRegisterOperands (reg_n, reg_m); |
| 9555 | |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9556 | 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] | 9557 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9558 | } |
| 9559 | return true; |
| 9560 | } |
Caroline Tice | 4cccd53 | 2011-03-29 23:44:20 +0000 | [diff] [blame] | 9561 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9562 | // A8.6.202 STREX |
Caroline Tice | 5168b6c | 2011-03-30 05:15:46 +0000 | [diff] [blame] | 9563 | // Store Register Exclusive calculates an address from a base register value and an immediate offset, and stores a |
| 9564 | // 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] | 9565 | bool |
| 9566 | EmulateInstructionARM::EmulateSTREX (const uint32_t opcode, const ARMEncoding encoding) |
| 9567 | { |
| 9568 | #if 0 |
Caroline Tice | 5168b6c | 2011-03-30 05:15:46 +0000 | [diff] [blame] | 9569 | if ConditionPassed() then |
| 9570 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 9571 | address = R[n] + imm32; |
| 9572 | if ExclusiveMonitorsPass(address,4) then |
| 9573 | MemA[address,4] = R[t]; |
| 9574 | R[d] = 0; |
| 9575 | else |
| 9576 | R[d] = 1; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9577 | #endif |
| 9578 | |
Caroline Tice | 5168b6c | 2011-03-30 05:15:46 +0000 | [diff] [blame] | 9579 | bool success = false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9580 | |
| 9581 | if (ConditionPassed(opcode)) |
| 9582 | { |
Caroline Tice | 5168b6c | 2011-03-30 05:15:46 +0000 | [diff] [blame] | 9583 | uint32_t d; |
| 9584 | uint32_t t; |
| 9585 | uint32_t n; |
| 9586 | uint32_t imm32; |
| 9587 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 9588 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9589 | switch (encoding) |
| 9590 | { |
Caroline Tice | 5168b6c | 2011-03-30 05:15:46 +0000 | [diff] [blame] | 9591 | case eEncodingT1: |
| 9592 | // d = UInt(Rd); t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm8:’00’, 32); |
| 9593 | d = Bits32 (opcode, 11, 8); |
| 9594 | t = Bits32 (opcode, 15, 12); |
| 9595 | n = Bits32 (opcode, 19, 16); |
| 9596 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 9597 | |
| 9598 | // if BadReg(d) || BadReg(t) || n == 15 then UNPREDICTABLE; |
| 9599 | if (BadReg (d) || BadReg (t) || (n == 15)) |
| 9600 | return false; |
| 9601 | |
| 9602 | // if d == n || d == t then UNPREDICTABLE; |
| 9603 | if ((d == n) || (d == t)) |
| 9604 | return false; |
| 9605 | |
| 9606 | break; |
| 9607 | |
| 9608 | case eEncodingA1: |
| 9609 | // d = UInt(Rd); t = UInt(Rt); n = UInt(Rn); imm32 = Zeros(32); // Zero offset |
| 9610 | d = Bits32 (opcode, 15, 12); |
| 9611 | t = Bits32 (opcode, 3, 0); |
| 9612 | n = Bits32 (opcode, 19, 16); |
| 9613 | imm32 = 0; |
| 9614 | |
| 9615 | // if d == 15 || t == 15 || n == 15 then UNPREDICTABLE; |
| 9616 | if ((d == 15) || (t == 15) || (n == 15)) |
| 9617 | return false; |
| 9618 | |
| 9619 | // if d == n || d == t then UNPREDICTABLE; |
| 9620 | if ((d == n) || (d == t)) |
| 9621 | return false; |
| 9622 | |
| 9623 | break; |
| 9624 | |
| 9625 | default: |
| 9626 | return false; |
| 9627 | } |
| 9628 | |
| 9629 | // address = R[n] + imm32; |
| 9630 | uint32_t Rn = ReadCoreReg (n, &success); |
| 9631 | if (!success) |
| 9632 | return false; |
| 9633 | |
| 9634 | addr_t address = Rn + imm32; |
| 9635 | |
| 9636 | Register base_reg; |
| 9637 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 9638 | Register data_reg; |
| 9639 | data_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + t); |
| 9640 | EmulateInstruction::Context context; |
| 9641 | context.type = eContextRegisterStore; |
| 9642 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, imm32); |
| 9643 | |
| 9644 | // if ExclusiveMonitorsPass(address,4) then |
| 9645 | // if (ExclusiveMonitorsPass (address, addr_byte_size)) -- For now, for the sake of emulation, we will say this |
| 9646 | // always return true. |
| 9647 | if (true) |
| 9648 | { |
| 9649 | // MemA[address,4] = R[t]; |
| 9650 | uint32_t Rt = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_r0 + t, 0, &success); |
| 9651 | if (!success) |
| 9652 | return false; |
| 9653 | |
| 9654 | if (!MemAWrite (context, address, Rt, addr_byte_size)) |
| 9655 | return false; |
| 9656 | |
| 9657 | // R[d] = 0; |
| 9658 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, 0)) |
| 9659 | return false; |
| 9660 | } |
| 9661 | else |
| 9662 | { |
| 9663 | // R[d] = 1; |
| 9664 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, 1)) |
| 9665 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9666 | } |
| 9667 | } |
| 9668 | return true; |
| 9669 | } |
| 9670 | |
| 9671 | // A8.6.197 STRB (immediate, ARM) |
| 9672 | bool |
| 9673 | EmulateInstructionARM::EmulateSTRBImmARM (const uint32_t opcode, const ARMEncoding encoding) |
| 9674 | { |
| 9675 | #if 0 |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9676 | if ConditionPassed() then |
| 9677 | EncodingSpecificOperations(); |
| 9678 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 9679 | address = if index then offset_addr else R[n]; |
| 9680 | MemU[address,1] = R[t]<7:0>; |
| 9681 | if wback then R[n] = offset_addr; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9682 | #endif |
| 9683 | |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9684 | bool success = false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9685 | |
| 9686 | if (ConditionPassed(opcode)) |
| 9687 | { |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9688 | uint32_t t; |
| 9689 | uint32_t n; |
| 9690 | uint32_t imm32; |
| 9691 | bool index; |
| 9692 | bool add; |
| 9693 | bool wback; |
| 9694 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9695 | switch (encoding) |
| 9696 | { |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9697 | case eEncodingA1: |
| 9698 | // if P == ‘0’ && W == ‘1’ then SEE STRBT; |
| 9699 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 9700 | t = Bits32 (opcode, 15, 12); |
| 9701 | n = Bits32 (opcode, 19, 16); |
| 9702 | imm32 = Bits32 (opcode, 11, 0); |
| 9703 | |
| 9704 | // index = (P == ‘1’); add = (U == ‘1’); wback = (P == ‘0’) || (W == ‘1’); |
| 9705 | index = BitIsSet (opcode, 24); |
| 9706 | add = BitIsSet (opcode, 23); |
| 9707 | wback = BitIsClear (opcode, 24) || BitIsSet (opcode, 21); |
| 9708 | |
| 9709 | // if t == 15 then UNPREDICTABLE; |
| 9710 | if (t == 15) |
| 9711 | return false; |
| 9712 | |
| 9713 | // if wback && (n == 15 || n == t) then UNPREDICTABLE; |
| 9714 | if (wback && ((n == 15) || (n == t))) |
| 9715 | return false; |
| 9716 | |
| 9717 | break; |
| 9718 | |
| 9719 | default: |
| 9720 | return false; |
| 9721 | } |
| 9722 | |
| 9723 | // offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 9724 | uint32_t Rn = ReadCoreReg (n, &success); |
| 9725 | if (!success) |
| 9726 | return false; |
| 9727 | |
| 9728 | addr_t offset_addr; |
| 9729 | if (add) |
| 9730 | offset_addr = Rn + imm32; |
| 9731 | else |
| 9732 | offset_addr = Rn - imm32; |
| 9733 | |
| 9734 | // address = if index then offset_addr else R[n]; |
| 9735 | addr_t address; |
| 9736 | if (index) |
| 9737 | address = offset_addr; |
| 9738 | else |
| 9739 | address = Rn; |
| 9740 | |
| 9741 | // MemU[address,1] = R[t]<7:0>; |
| 9742 | uint32_t Rt = ReadCoreReg (t, &success); |
| 9743 | if (!success) |
| 9744 | return false; |
| 9745 | |
| 9746 | Register base_reg; |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 9747 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9748 | Register data_reg; |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 9749 | data_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + t); |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9750 | EmulateInstruction::Context context; |
| 9751 | context.type = eContextRegisterStore; |
| 9752 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 9753 | |
| 9754 | if (!MemUWrite (context, address, Bits32 (Rt, 7, 0), 1)) |
| 9755 | return false; |
| 9756 | |
| 9757 | // if wback then R[n] = offset_addr; |
| 9758 | if (wback) |
| 9759 | { |
Caroline Tice | 523c554 | 2011-04-13 00:42:12 +0000 | [diff] [blame] | 9760 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
Caroline Tice | ef44000 | 2011-03-30 05:40:56 +0000 | [diff] [blame] | 9761 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9762 | } |
| 9763 | } |
| 9764 | return true; |
| 9765 | } |
| 9766 | |
| 9767 | // A8.6.194 STR (immediate, ARM) |
| 9768 | bool |
| 9769 | EmulateInstructionARM::EmulateSTRImmARM (const uint32_t opcode, const ARMEncoding encoding) |
| 9770 | { |
| 9771 | #if 0 |
Caroline Tice | d42b3cc | 2011-03-30 06:03:24 +0000 | [diff] [blame] | 9772 | if ConditionPassed() then |
| 9773 | EncodingSpecificOperations(); |
| 9774 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 9775 | address = if index then offset_addr else R[n]; |
| 9776 | MemU[address,4] = if t == 15 then PCStoreValue() else R[t]; |
| 9777 | if wback then R[n] = offset_addr; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9778 | #endif |
| 9779 | |
Caroline Tice | d42b3cc | 2011-03-30 06:03:24 +0000 | [diff] [blame] | 9780 | bool success = false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9781 | |
| 9782 | if (ConditionPassed(opcode)) |
| 9783 | { |
Caroline Tice | d42b3cc | 2011-03-30 06:03:24 +0000 | [diff] [blame] | 9784 | uint32_t t; |
| 9785 | uint32_t n; |
| 9786 | uint32_t imm32; |
| 9787 | bool index; |
| 9788 | bool add; |
| 9789 | bool wback; |
| 9790 | |
| 9791 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 9792 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9793 | switch (encoding) |
| 9794 | { |
Caroline Tice | d42b3cc | 2011-03-30 06:03:24 +0000 | [diff] [blame] | 9795 | case eEncodingA1: |
| 9796 | // if P == ‘0’ && W == ‘1’ then SEE STRT; |
| 9797 | // if Rn == ‘1101’ && P == ‘1’ && U == ‘0’ && W == ‘1’ && imm12 == ‘000000000100’ then SEE PUSH; |
| 9798 | // t = UInt(Rt); n = UInt(Rn); imm32 = ZeroExtend(imm12, 32); |
| 9799 | t = Bits32 (opcode, 15, 12); |
| 9800 | n = Bits32 (opcode, 19, 16); |
| 9801 | imm32 = Bits32 (opcode, 11, 0); |
| 9802 | |
| 9803 | // index = (P == ‘1’); add = (U == ‘1’); wback = (P == ‘0’) || (W == ‘1’); |
| 9804 | index = BitIsSet (opcode, 24); |
| 9805 | add = BitIsSet (opcode, 23); |
| 9806 | wback = BitIsClear (opcode, 24) || BitIsSet (opcode, 21); |
| 9807 | |
| 9808 | // if wback && (n == 15 || n == t) then UNPREDICTABLE; |
| 9809 | if (wback && ((n == 15) || (n == t))) |
| 9810 | return false; |
| 9811 | |
| 9812 | break; |
| 9813 | |
| 9814 | default: |
| 9815 | return false; |
| 9816 | } |
| 9817 | |
| 9818 | // offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 9819 | uint32_t Rn = ReadCoreReg (n, &success); |
| 9820 | if (!success) |
| 9821 | return false; |
| 9822 | |
| 9823 | addr_t offset_addr; |
| 9824 | if (add) |
| 9825 | offset_addr = Rn + imm32; |
| 9826 | else |
| 9827 | offset_addr = Rn - imm32; |
| 9828 | |
| 9829 | // address = if index then offset_addr else R[n]; |
| 9830 | addr_t address; |
| 9831 | if (index) |
| 9832 | address = offset_addr; |
| 9833 | else |
| 9834 | address = Rn; |
| 9835 | |
| 9836 | Register base_reg; |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 9837 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
Caroline Tice | d42b3cc | 2011-03-30 06:03:24 +0000 | [diff] [blame] | 9838 | Register data_reg; |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 9839 | data_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + t); |
Caroline Tice | d42b3cc | 2011-03-30 06:03:24 +0000 | [diff] [blame] | 9840 | EmulateInstruction::Context context; |
| 9841 | context.type = eContextRegisterStore; |
| 9842 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 9843 | |
| 9844 | // MemU[address,4] = if t == 15 then PCStoreValue() else R[t]; |
| 9845 | uint32_t Rt = ReadCoreReg (t, &success); |
| 9846 | if (!success) |
| 9847 | return false; |
| 9848 | |
| 9849 | if (t == 15) |
| 9850 | { |
Caroline Tice | e98b958 | 2011-03-30 16:05:23 +0000 | [diff] [blame] | 9851 | uint32_t pc_value = ReadCoreReg (PC_REG, &success); |
Caroline Tice | d42b3cc | 2011-03-30 06:03:24 +0000 | [diff] [blame] | 9852 | if (!success) |
| 9853 | return false; |
| 9854 | |
| 9855 | if (!MemUWrite (context, address, pc_value, addr_byte_size)) |
| 9856 | return false; |
| 9857 | } |
| 9858 | else |
| 9859 | { |
| 9860 | if (!MemUWrite (context, address, Rt, addr_byte_size)) |
| 9861 | return false; |
| 9862 | } |
| 9863 | |
| 9864 | // if wback then R[n] = offset_addr; |
| 9865 | if (wback) |
| 9866 | { |
| 9867 | context.type = eContextAdjustBaseRegister; |
| 9868 | context.SetImmediate (offset_addr); |
| 9869 | |
| 9870 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 9871 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9872 | } |
| 9873 | } |
| 9874 | return true; |
| 9875 | } |
| 9876 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9877 | // A8.6.66 LDRD (immediate) |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 9878 | // Load Register Dual (immediate) calculates an address from a base register value and an immediate offset, loads two |
| 9879 | // 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] | 9880 | bool |
| 9881 | EmulateInstructionARM::EmulateLDRDImmediate (const uint32_t opcode, const ARMEncoding encoding) |
| 9882 | { |
| 9883 | #if 0 |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 9884 | if ConditionPassed() then |
| 9885 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 9886 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 9887 | address = if index then offset_addr else R[n]; |
| 9888 | R[t] = MemA[address,4]; |
| 9889 | R[t2] = MemA[address+4,4]; |
| 9890 | if wback then R[n] = offset_addr; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9891 | #endif |
| 9892 | |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 9893 | bool success = false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9894 | |
| 9895 | if (ConditionPassed(opcode)) |
| 9896 | { |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 9897 | uint32_t t; |
| 9898 | uint32_t t2; |
| 9899 | uint32_t n; |
| 9900 | uint32_t imm32; |
| 9901 | bool index; |
| 9902 | bool add; |
| 9903 | bool wback; |
| 9904 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 9905 | switch (encoding) |
| 9906 | { |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 9907 | case eEncodingT1: |
| 9908 | //if P == ‘0’ && W == ‘0’ then SEE “Related encodings”; |
| 9909 | //if Rn == ‘1111’ then SEE LDRD (literal); |
| 9910 | //t = UInt(Rt); t2 = UInt(Rt2); n = UInt(Rn); imm32 = ZeroExtend(imm8:’00’, 32); |
| 9911 | t = Bits32 (opcode, 15, 12); |
| 9912 | t2 = Bits32 (opcode, 11, 8); |
| 9913 | n = Bits32 (opcode, 19, 16); |
| 9914 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 9915 | |
| 9916 | //index = (P == ‘1’); add = (U == ‘1’); wback = (W == ‘1’); |
| 9917 | index = BitIsSet (opcode, 24); |
| 9918 | add = BitIsSet (opcode, 23); |
| 9919 | wback = BitIsSet (opcode, 21); |
| 9920 | |
| 9921 | //if wback && (n == t || n == t2) then UNPREDICTABLE; |
| 9922 | if (wback && ((n == t) || (n == t2))) |
| 9923 | return false; |
| 9924 | |
| 9925 | //if BadReg(t) || BadReg(t2) || t == t2 then UNPREDICTABLE; |
| 9926 | if (BadReg (t) || BadReg (t2) || (t == t2)) |
| 9927 | return false; |
| 9928 | |
| 9929 | break; |
| 9930 | |
| 9931 | case eEncodingA1: |
| 9932 | //if Rn == ‘1111’ then SEE LDRD (literal); |
| 9933 | //if Rt<0> == ‘1’ then UNPREDICTABLE; |
| 9934 | //t = UInt(Rt); t2 = t+1; n = UInt(Rn); imm32 = ZeroExtend(imm4H:imm4L, 32); |
| 9935 | t = Bits32 (opcode, 15, 12); |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 9936 | if (BitIsSet (t, 0)) |
| 9937 | return false; |
Caroline Tice | 1697dd7 | 2011-03-30 17:11:45 +0000 | [diff] [blame] | 9938 | t2 = t + 1; |
| 9939 | n = Bits32 (opcode, 19, 16); |
| 9940 | imm32 = (Bits32 (opcode, 11, 8) << 4) | Bits32 (opcode, 3, 0); |
| 9941 | |
| 9942 | //index = (P == ‘1’); add = (U == ‘1’); wback = (P == ‘0’) || (W == ‘1’); |
| 9943 | index = BitIsSet (opcode, 24); |
| 9944 | add = BitIsSet (opcode, 23); |
| 9945 | wback = BitIsClear (opcode, 24) || BitIsSet (opcode, 21); |
| 9946 | |
| 9947 | //if P == ‘0’ && W == ‘1’ then UNPREDICTABLE; |
| 9948 | if (BitIsClear (opcode, 24) && BitIsSet (opcode, 21)) |
| 9949 | return false; |
| 9950 | |
| 9951 | //if wback && (n == t || n == t2) then UNPREDICTABLE; |
| 9952 | if (wback && ((n == t) || (n == t2))) |
| 9953 | return false; |
| 9954 | |
| 9955 | //if t2 == 15 then UNPREDICTABLE; |
| 9956 | if (t2 == 15) |
| 9957 | return false; |
| 9958 | |
| 9959 | break; |
| 9960 | |
| 9961 | default: |
| 9962 | return false; |
| 9963 | } |
| 9964 | |
| 9965 | //offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 9966 | uint32_t Rn = ReadCoreReg (n, &success); |
| 9967 | if (!success) |
| 9968 | return false; |
| 9969 | |
| 9970 | addr_t offset_addr; |
| 9971 | if (add) |
| 9972 | offset_addr = Rn + imm32; |
| 9973 | else |
| 9974 | offset_addr = Rn - imm32; |
| 9975 | |
| 9976 | //address = if index then offset_addr else R[n]; |
| 9977 | addr_t address; |
| 9978 | if (index) |
| 9979 | address = offset_addr; |
| 9980 | else |
| 9981 | address = Rn; |
| 9982 | |
| 9983 | //R[t] = MemA[address,4]; |
| 9984 | Register base_reg; |
| 9985 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 9986 | |
| 9987 | EmulateInstruction::Context context; |
| 9988 | context.type = eContextRegisterLoad; |
| 9989 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 9990 | |
| 9991 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 9992 | uint32_t data = MemARead (context, address, addr_byte_size, 0, &success); |
| 9993 | if (!success) |
| 9994 | return false; |
| 9995 | |
| 9996 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 9997 | return false; |
| 9998 | |
| 9999 | //R[t2] = MemA[address+4,4]; |
| 10000 | |
| 10001 | context.SetRegisterPlusOffset (base_reg, (address + 4) - Rn); |
| 10002 | data = MemARead (context, address + 4, addr_byte_size, 0, &success); |
| 10003 | if (!success) |
| 10004 | return false; |
| 10005 | |
| 10006 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t2, data)) |
| 10007 | return false; |
| 10008 | |
| 10009 | //if wback then R[n] = offset_addr; |
| 10010 | if (wback) |
| 10011 | { |
| 10012 | context.type = eContextAdjustBaseRegister; |
| 10013 | context.SetAddress (offset_addr); |
| 10014 | |
| 10015 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 10016 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10017 | } |
| 10018 | } |
| 10019 | return true; |
| 10020 | } |
| 10021 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10022 | // A8.6.68 LDRD (register) |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10023 | // Load Register Dual (register) calculates an address from a base register value and a register offset, loads two |
| 10024 | // 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] | 10025 | bool |
| 10026 | EmulateInstructionARM::EmulateLDRDRegister (const uint32_t opcode, const ARMEncoding encoding) |
| 10027 | { |
| 10028 | #if 0 |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10029 | if ConditionPassed() then |
| 10030 | EncodingSpecificOperations(); |
| 10031 | offset_addr = if add then (R[n] + R[m]) else (R[n] - R[m]); |
| 10032 | address = if index then offset_addr else R[n]; |
| 10033 | R[t] = MemA[address,4]; |
| 10034 | R[t2] = MemA[address+4,4]; |
| 10035 | if wback then R[n] = offset_addr; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10036 | #endif |
| 10037 | |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10038 | bool success = false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10039 | |
| 10040 | if (ConditionPassed(opcode)) |
| 10041 | { |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10042 | uint32_t t; |
| 10043 | uint32_t t2; |
| 10044 | uint32_t n; |
| 10045 | uint32_t m; |
| 10046 | bool index; |
| 10047 | bool add; |
| 10048 | bool wback; |
| 10049 | |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10050 | switch (encoding) |
| 10051 | { |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10052 | case eEncodingA1: |
| 10053 | // if Rt<0> == ‘1’ then UNPREDICTABLE; |
| 10054 | // t = UInt(Rt); t2 = t+1; n = UInt(Rn); m = UInt(Rm); |
| 10055 | t = Bits32 (opcode, 15, 12); |
| 10056 | if (BitIsSet (t, 0)) |
| 10057 | return false; |
| 10058 | t2 = t + 1; |
| 10059 | n = Bits32 (opcode, 19, 16); |
| 10060 | m = Bits32 (opcode, 3, 0); |
| 10061 | |
| 10062 | // index = (P == ‘1’); add = (U == ‘1’); wback = (P == ‘0’) || (W == ‘1’); |
| 10063 | index = BitIsSet (opcode, 24); |
| 10064 | add = BitIsSet (opcode, 23); |
| 10065 | wback = BitIsClear (opcode, 24) || BitIsSet (opcode, 21); |
| 10066 | |
| 10067 | // if P == ‘0’ && W == ‘1’ then UNPREDICTABLE; |
| 10068 | if (BitIsClear (opcode, 24) && BitIsSet (opcode, 21)) |
| 10069 | return false; |
| 10070 | |
| 10071 | // if t2 == 15 || m == 15 || m == t || m == t2 then UNPREDICTABLE; |
| 10072 | if ((t2 == 15) || (m == 15) || (m == t) || (m == t2)) |
| 10073 | return false; |
| 10074 | |
| 10075 | // if wback && (n == 15 || n == t || n == t2) then UNPREDICTABLE; |
| 10076 | if (wback && ((n == 15) || (n == t) || (n == t2))) |
| 10077 | return false; |
| 10078 | |
| 10079 | // if ArchVersion() < 6 && wback && m == n then UNPREDICTABLE; |
| 10080 | if ((ArchVersion() < 6) && wback && (m == n)) |
| 10081 | return false; |
| 10082 | break; |
| 10083 | |
| 10084 | default: |
| 10085 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10086 | } |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10087 | |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10088 | uint32_t Rn = ReadCoreReg (n, &success); |
| 10089 | if (!success) |
| 10090 | return false; |
| 10091 | Register base_reg; |
| 10092 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10093 | |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10094 | uint32_t Rm = ReadCoreReg (m, &success); |
| 10095 | if (!success) |
| 10096 | return false; |
| 10097 | Register offset_reg; |
| 10098 | offset_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + m); |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10099 | |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10100 | // offset_addr = if add then (R[n] + R[m]) else (R[n] - R[m]); |
| 10101 | addr_t offset_addr; |
| 10102 | if (add) |
| 10103 | offset_addr = Rn + Rm; |
| 10104 | else |
| 10105 | offset_addr = Rn - Rm; |
| 10106 | |
| 10107 | // address = if index then offset_addr else R[n]; |
| 10108 | addr_t address; |
| 10109 | if (index) |
| 10110 | address = offset_addr; |
| 10111 | else |
| 10112 | address = Rn; |
| 10113 | |
| 10114 | EmulateInstruction::Context context; |
| 10115 | context.type = eContextRegisterLoad; |
| 10116 | context.SetRegisterPlusIndirectOffset (base_reg, offset_reg); |
| 10117 | |
| 10118 | // R[t] = MemA[address,4]; |
| 10119 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 10120 | uint32_t data = MemARead (context, address, addr_byte_size, 0, &success); |
| 10121 | if (!success) |
| 10122 | return false; |
| 10123 | |
| 10124 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t, data)) |
| 10125 | return false; |
| 10126 | |
| 10127 | // R[t2] = MemA[address+4,4]; |
| 10128 | |
| 10129 | data = MemARead (context, address + 4, addr_byte_size, 0, &success); |
| 10130 | if (!success) |
| 10131 | return false; |
| 10132 | |
| 10133 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + t2, data)) |
| 10134 | return false; |
| 10135 | |
| 10136 | // if wback then R[n] = offset_addr; |
| 10137 | if (wback) |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10138 | { |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10139 | context.type = eContextAdjustBaseRegister; |
| 10140 | context.SetAddress (offset_addr); |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10141 | |
Caroline Tice | eab301f | 2011-03-30 17:54:52 +0000 | [diff] [blame] | 10142 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 10143 | return false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10144 | } |
| 10145 | } |
| 10146 | return true; |
| 10147 | } |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10148 | |
| 10149 | // A8.6.200 STRD (immediate) |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10150 | // Store Register Dual (immediate) calculates an address from a base register value and an immediate offset, and |
| 10151 | // 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] | 10152 | bool |
| 10153 | EmulateInstructionARM::EmulateSTRDImm (const uint32_t opcode, const ARMEncoding encoding) |
| 10154 | { |
| 10155 | #if 0 |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10156 | if ConditionPassed() then |
| 10157 | EncodingSpecificOperations(); NullCheckIfThumbEE(n); |
| 10158 | offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 10159 | address = if index then offset_addr else R[n]; |
| 10160 | MemA[address,4] = R[t]; |
| 10161 | MemA[address+4,4] = R[t2]; |
| 10162 | if wback then R[n] = offset_addr; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10163 | #endif |
| 10164 | |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10165 | bool success = false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10166 | |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10167 | if (ConditionPassed(opcode)) |
| 10168 | { |
| 10169 | uint32_t t; |
| 10170 | uint32_t t2; |
| 10171 | uint32_t n; |
| 10172 | uint32_t imm32; |
| 10173 | bool index; |
| 10174 | bool add; |
| 10175 | bool wback; |
| 10176 | |
| 10177 | switch (encoding) |
| 10178 | { |
| 10179 | case eEncodingT1: |
| 10180 | // if P == ‘0’ && W == ‘0’ then SEE “Related encodings”; |
| 10181 | // t = UInt(Rt); t2 = UInt(Rt2); n = UInt(Rn); imm32 = ZeroExtend(imm8:’00’, 32); |
| 10182 | t = Bits32 (opcode, 15, 12); |
| 10183 | t2 = Bits32 (opcode, 11, 8); |
| 10184 | n = Bits32 (opcode, 19, 16); |
| 10185 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 10186 | |
| 10187 | // index = (P == ‘1’); add = (U == ‘1’); wback = (W == ‘1’); |
| 10188 | index = BitIsSet (opcode, 24); |
| 10189 | add = BitIsSet (opcode, 23); |
| 10190 | wback = BitIsSet (opcode, 21); |
| 10191 | |
| 10192 | // if wback && (n == t || n == t2) then UNPREDICTABLE; |
| 10193 | if (wback && ((n == t) || (n == t2))) |
| 10194 | return false; |
| 10195 | |
| 10196 | // if n == 15 || BadReg(t) || BadReg(t2) then UNPREDICTABLE; |
| 10197 | if ((n == 15) || BadReg (t) || BadReg (t2)) |
| 10198 | return false; |
| 10199 | |
| 10200 | break; |
| 10201 | |
| 10202 | case eEncodingA1: |
| 10203 | // if Rt<0> == ‘1’ then UNPREDICTABLE; |
| 10204 | // t = UInt(Rt); t2 = t+1; n = UInt(Rn); imm32 = ZeroExtend(imm4H:imm4L, 32); |
| 10205 | t = Bits32 (opcode, 15, 12); |
| 10206 | if (BitIsSet (t, 0)) |
| 10207 | return false; |
| 10208 | |
| 10209 | t2 = t + 1; |
| 10210 | n = Bits32 (opcode, 19, 16); |
| 10211 | imm32 = (Bits32 (opcode, 11, 8) << 4) | Bits32 (opcode, 3, 0); |
| 10212 | |
| 10213 | // index = (P == ‘1’); add = (U == ‘1’); wback = (P == ‘0’) || (W == ‘1’); |
| 10214 | index = BitIsSet (opcode, 24); |
| 10215 | add = BitIsSet (opcode, 23); |
| 10216 | wback = BitIsClear (opcode, 24) || BitIsSet (opcode, 21); |
| 10217 | |
| 10218 | // if P == ‘0’ && W == ‘1’ then UNPREDICTABLE; |
| 10219 | if (BitIsClear (opcode, 24) && BitIsSet (opcode, 21)) |
| 10220 | return false; |
| 10221 | |
| 10222 | // if wback && (n == 15 || n == t || n == t2) then UNPREDICTABLE; |
| 10223 | if (wback && ((n == 15) || (n == t) || (n == t2))) |
| 10224 | return false; |
| 10225 | |
| 10226 | // if t2 == 15 then UNPREDICTABLE; |
| 10227 | if (t2 == 15) |
| 10228 | return false; |
| 10229 | |
| 10230 | break; |
| 10231 | |
| 10232 | default: |
| 10233 | return false; |
| 10234 | } |
| 10235 | |
| 10236 | Register base_reg; |
| 10237 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 10238 | |
| 10239 | uint32_t Rn = ReadCoreReg (n, &success); |
| 10240 | if (!success) |
| 10241 | return false; |
| 10242 | |
| 10243 | //offset_addr = if add then (R[n] + imm32) else (R[n] - imm32); |
| 10244 | addr_t offset_addr; |
| 10245 | if (add) |
| 10246 | offset_addr = Rn + imm32; |
| 10247 | else |
| 10248 | offset_addr = Rn - imm32; |
| 10249 | |
| 10250 | //address = if index then offset_addr else R[n]; |
| 10251 | addr_t address; |
| 10252 | if (index) |
| 10253 | address = offset_addr; |
| 10254 | else |
| 10255 | address = Rn; |
| 10256 | |
| 10257 | //MemA[address,4] = R[t]; |
| 10258 | Register data_reg; |
| 10259 | data_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + t); |
| 10260 | |
| 10261 | uint32_t data = ReadCoreReg (t, &success); |
| 10262 | if (!success) |
| 10263 | return false; |
| 10264 | |
| 10265 | EmulateInstruction::Context context; |
| 10266 | context.type = eContextRegisterStore; |
| 10267 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 10268 | |
| 10269 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 10270 | |
| 10271 | if (!MemAWrite (context, address, data, addr_byte_size)) |
| 10272 | return false; |
| 10273 | |
| 10274 | //MemA[address+4,4] = R[t2]; |
| 10275 | data_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + t2); |
| 10276 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, (address + 4) - Rn); |
| 10277 | |
| 10278 | data = ReadCoreReg (t2, &success); |
| 10279 | if (!success) |
| 10280 | return false; |
| 10281 | |
| 10282 | if (!MemAWrite (context, address + 4, data, addr_byte_size)) |
| 10283 | return false; |
| 10284 | |
| 10285 | //if wback then R[n] = offset_addr; |
| 10286 | if (wback) |
| 10287 | { |
| 10288 | context.type = eContextAdjustBaseRegister; |
| 10289 | context.SetAddress (offset_addr); |
| 10290 | |
| 10291 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 10292 | return false; |
| 10293 | } |
| 10294 | } |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10295 | return true; |
| 10296 | } |
| 10297 | |
| 10298 | |
| 10299 | // A8.6.201 STRD (register) |
| 10300 | bool |
| 10301 | EmulateInstructionARM::EmulateSTRDReg (const uint32_t opcode, const ARMEncoding encoding) |
| 10302 | { |
| 10303 | #if 0 |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10304 | if ConditionPassed() then |
| 10305 | EncodingSpecificOperations(); |
| 10306 | offset_addr = if add then (R[n] + R[m]) else (R[n] - R[m]); |
| 10307 | address = if index then offset_addr else R[n]; |
| 10308 | MemA[address,4] = R[t]; |
| 10309 | MemA[address+4,4] = R[t2]; |
| 10310 | if wback then R[n] = offset_addr; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10311 | #endif |
| 10312 | |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10313 | bool success = false; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10314 | |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10315 | if (ConditionPassed(opcode)) |
| 10316 | { |
| 10317 | uint32_t t; |
| 10318 | uint32_t t2; |
| 10319 | uint32_t n; |
| 10320 | uint32_t m; |
| 10321 | bool index; |
| 10322 | bool add; |
| 10323 | bool wback; |
| 10324 | |
| 10325 | switch (encoding) |
| 10326 | { |
| 10327 | case eEncodingA1: |
| 10328 | // if Rt<0> == ‘1’ then UNPREDICTABLE; |
| 10329 | // t = UInt(Rt); t2 = t+1; n = UInt(Rn); m = UInt(Rm); |
| 10330 | t = Bits32 (opcode, 15, 12); |
| 10331 | if (BitIsSet (t, 0)) |
| 10332 | return false; |
| 10333 | |
| 10334 | t2 = t+1; |
| 10335 | n = Bits32 (opcode, 19, 16); |
| 10336 | m = Bits32 (opcode, 3, 0); |
| 10337 | |
| 10338 | // index = (P == ‘1’); add = (U == ‘1’); wback = (P == ‘0’) || (W == ‘1’); |
| 10339 | index = BitIsSet (opcode, 24); |
| 10340 | add = BitIsSet (opcode, 23); |
| 10341 | wback = BitIsClear (opcode, 24) || BitIsSet (opcode, 21); |
| 10342 | |
| 10343 | // if P == ‘0’ && W == ‘1’ then UNPREDICTABLE; |
| 10344 | if (BitIsClear (opcode, 24) && BitIsSet (opcode, 21)) |
| 10345 | return false; |
| 10346 | |
| 10347 | // if t2 == 15 || m == 15 then UNPREDICTABLE; |
| 10348 | if ((t2 == 15) || (m == 15)) |
| 10349 | return false; |
| 10350 | |
| 10351 | // if wback && (n == 15 || n == t || n == t2) then UNPREDICTABLE; |
| 10352 | if (wback && ((n == 15) || (n == t) || (n == t2))) |
| 10353 | return false; |
| 10354 | |
| 10355 | // if ArchVersion() < 6 && wback && m == n then UNPREDICTABLE; |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10356 | if ((ArchVersion() < 6) && wback && (m == n)) |
Caroline Tice | 74467fe | 2011-03-30 19:02:56 +0000 | [diff] [blame] | 10357 | return false; |
| 10358 | |
| 10359 | break; |
| 10360 | |
| 10361 | default: |
| 10362 | return false; |
| 10363 | } |
| 10364 | |
| 10365 | Register base_reg; |
| 10366 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 10367 | Register offset_reg; |
| 10368 | offset_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + m); |
| 10369 | Register data_reg; |
| 10370 | data_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + t); |
| 10371 | |
| 10372 | uint32_t Rn = ReadCoreReg (n, &success); |
| 10373 | if (!success) |
| 10374 | return false; |
| 10375 | |
| 10376 | uint32_t Rm = ReadCoreReg (m, &success); |
| 10377 | if (!success) |
| 10378 | return false; |
| 10379 | |
| 10380 | // offset_addr = if add then (R[n] + R[m]) else (R[n] - R[m]); |
| 10381 | addr_t offset_addr; |
| 10382 | if (add) |
| 10383 | offset_addr = Rn + Rm; |
| 10384 | else |
| 10385 | offset_addr = Rn - Rm; |
| 10386 | |
| 10387 | // address = if index then offset_addr else R[n]; |
| 10388 | addr_t address; |
| 10389 | if (index) |
| 10390 | address = offset_addr; |
| 10391 | else |
| 10392 | address = Rn; |
| 10393 | // MemA[address,4] = R[t]; |
| 10394 | uint32_t Rt = ReadCoreReg (t, &success); |
| 10395 | if (!success) |
| 10396 | return false; |
| 10397 | |
| 10398 | EmulateInstruction::Context context; |
| 10399 | context.type = eContextRegisterStore; |
| 10400 | context.SetRegisterToRegisterPlusIndirectOffset (base_reg, offset_reg, data_reg); |
| 10401 | |
| 10402 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 10403 | |
| 10404 | if (!MemAWrite (context, address, Rt, addr_byte_size)) |
| 10405 | return false; |
| 10406 | |
| 10407 | // MemA[address+4,4] = R[t2]; |
| 10408 | uint32_t Rt2 = ReadCoreReg (t2, &success); |
| 10409 | if (!success) |
| 10410 | return false; |
| 10411 | |
| 10412 | data_reg.num = dwarf_r0 + t2; |
| 10413 | |
| 10414 | context.SetRegisterToRegisterPlusIndirectOffset (base_reg, offset_reg, data_reg); |
| 10415 | |
| 10416 | if (!MemAWrite (context, address + 4, Rt2, addr_byte_size)) |
| 10417 | return false; |
| 10418 | |
| 10419 | // if wback then R[n] = offset_addr; |
| 10420 | if (wback) |
| 10421 | { |
| 10422 | context.type = eContextAdjustBaseRegister; |
| 10423 | context.SetAddress (offset_addr); |
| 10424 | |
| 10425 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, offset_addr)) |
| 10426 | return false; |
| 10427 | |
| 10428 | } |
| 10429 | } |
Greg Clayton | 24bc5d9 | 2011-03-30 18:16:51 +0000 | [diff] [blame] | 10430 | return true; |
Caroline Tice | d05b490 | 2011-03-29 21:24:06 +0000 | [diff] [blame] | 10431 | } |
| 10432 | |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10433 | // A8.6.319 VLDM |
| 10434 | // Vector Load Multiple loads multiple extension registers from consecutive memory locations using an address from |
| 10435 | // an ARM core register. |
| 10436 | bool |
| 10437 | EmulateInstructionARM::EmulateVLDM (const uint32_t opcode, const ARMEncoding encoding) |
| 10438 | { |
| 10439 | #if 0 |
| 10440 | if ConditionPassed() then |
| 10441 | EncodingSpecificOperations(); CheckVFPEnabled(TRUE); NullCheckIfThumbEE(n); |
| 10442 | address = if add then R[n] else R[n]-imm32; |
| 10443 | if wback then R[n] = if add then R[n}+imm32 else R[n]-imm32; |
| 10444 | for r = 0 to regs-1 |
| 10445 | if single_regs then |
| 10446 | S[d+r] = MemA[address,4]; address = address+4; |
| 10447 | else |
| 10448 | word1 = MemA[address,4]; word2 = MemA[address+4,4]; address = address+8; |
| 10449 | // Combine the word-aligned words in the correct order for current endianness. |
| 10450 | D[d+r] = if BigEndian() then word1:word2 else word2:word1; |
| 10451 | #endif |
| 10452 | |
| 10453 | bool success = false; |
| 10454 | |
| 10455 | if (ConditionPassed(opcode)) |
| 10456 | { |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10457 | bool single_regs; |
| 10458 | bool add; |
| 10459 | bool wback; |
| 10460 | uint32_t d; |
| 10461 | uint32_t n; |
| 10462 | uint32_t imm32; |
| 10463 | uint32_t regs; |
| 10464 | |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10465 | switch (encoding) |
| 10466 | { |
| 10467 | case eEncodingT1: |
| 10468 | case eEncodingA1: |
| 10469 | // if P == ‘0’ && U == ‘0’ && W == ‘0’ then SEE “Related encodings”; |
| 10470 | // if P == ‘0’ && U == ‘1’ && W == ‘1’ && Rn == ‘1101’ then SEE VPOP; |
| 10471 | // if P == ‘1’ && W == ‘0’ then SEE VLDR; |
| 10472 | // if P == U && W == ‘1’ then UNDEFINED; |
| 10473 | if ((Bit32 (opcode, 24) == Bit32 (opcode, 23)) && BitIsSet (opcode, 21)) |
| 10474 | return false; |
| 10475 | |
| 10476 | // // Remaining combinations are PUW = 010 (IA without !), 011 (IA with !), 101 (DB with !) |
| 10477 | // single_regs = FALSE; add = (U == ‘1’); wback = (W == ‘1’); |
| 10478 | single_regs = false; |
| 10479 | add = BitIsSet (opcode, 23); |
| 10480 | wback = BitIsSet (opcode, 21); |
| 10481 | |
| 10482 | // d = UInt(D:Vd); n = UInt(Rn); imm32 = ZeroExtend(imm8:’00’, 32); |
| 10483 | d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12); |
| 10484 | n = Bits32 (opcode, 19, 16); |
| 10485 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 10486 | |
| 10487 | // regs = UInt(imm8) DIV 2; // If UInt(imm8) is odd, see “FLDMX”. |
| 10488 | regs = Bits32 (opcode, 7, 0) / 2; |
| 10489 | |
| 10490 | // if n == 15 && (wback || CurrentInstrSet() != InstrSet_ARM) then UNPREDICTABLE; |
| 10491 | if (n == 15 && (wback || CurrentInstrSet() != eModeARM)) |
| 10492 | return false; |
| 10493 | |
| 10494 | // if regs == 0 || regs > 16 || (d+regs) > 32 then UNPREDICTABLE; |
| 10495 | if ((regs == 0) || (regs > 16) || ((d + regs) > 32)) |
| 10496 | return false; |
| 10497 | |
| 10498 | break; |
| 10499 | |
| 10500 | case eEncodingT2: |
| 10501 | case eEncodingA2: |
| 10502 | // if P == ‘0’ && U == ‘0’ && W == ‘0’ then SEE “Related encodings”; |
| 10503 | // if P == ‘0’ && U == ‘1’ && W == ‘1’ && Rn == ‘1101’ then SEE VPOP; |
| 10504 | // if P == ‘1’ && W == ‘0’ then SEE VLDR; |
| 10505 | // if P == U && W == ‘1’ then UNDEFINED; |
| 10506 | if ((Bit32 (opcode, 24) == Bit32 (opcode, 23)) && BitIsSet (opcode, 21)) |
| 10507 | return false; |
| 10508 | |
| 10509 | // // Remaining combinations are PUW = 010 (IA without !), 011 (IA with !), 101 (DB with !) |
| 10510 | // single_regs = TRUE; add = (U == ‘1’); wback = (W == ‘1’); d = UInt(Vd:D); n = UInt(Rn); |
| 10511 | single_regs = true; |
| 10512 | add = BitIsSet (opcode, 23); |
| 10513 | wback = BitIsSet (opcode, 21); |
| 10514 | d = (Bits32 (opcode, 15, 12) << 1) | Bit32 (opcode, 22); |
| 10515 | n = Bits32 (opcode, 19, 16); |
| 10516 | |
| 10517 | // imm32 = ZeroExtend(imm8:’00’, 32); regs = UInt(imm8); |
| 10518 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 10519 | regs = Bits32 (opcode, 7, 0); |
| 10520 | |
| 10521 | // if n == 15 && (wback || CurrentInstrSet() != InstrSet_ARM) then UNPREDICTABLE; |
| 10522 | if ((n == 15) && (wback || (CurrentInstrSet() != eModeARM))) |
| 10523 | return false; |
| 10524 | |
| 10525 | // if regs == 0 || (d+regs) > 32 then UNPREDICTABLE; |
| 10526 | if ((regs == 0) || ((d + regs) > 32)) |
| 10527 | return false; |
| 10528 | break; |
| 10529 | |
| 10530 | default: |
| 10531 | return false; |
| 10532 | } |
| 10533 | |
| 10534 | Register base_reg; |
| 10535 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 10536 | |
| 10537 | uint32_t Rn = ReadCoreReg (n, &success); |
| 10538 | if (!success) |
| 10539 | return false; |
| 10540 | |
| 10541 | // address = if add then R[n] else R[n]-imm32; |
| 10542 | addr_t address; |
| 10543 | if (add) |
| 10544 | address = Rn; |
| 10545 | else |
| 10546 | address = Rn - imm32; |
| 10547 | |
| 10548 | // if wback then R[n] = if add then R[n}+imm32 else R[n]-imm32; |
| 10549 | EmulateInstruction::Context context; |
| 10550 | |
| 10551 | if (wback) |
| 10552 | { |
| 10553 | uint32_t value; |
| 10554 | if (add) |
| 10555 | value = Rn + imm32; |
| 10556 | else |
| 10557 | value = Rn - imm32; |
| 10558 | |
| 10559 | context.type = eContextAdjustBaseRegister; |
| 10560 | context.SetImmediateSigned (value - Rn); |
| 10561 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, value)) |
| 10562 | return false; |
| 10563 | |
| 10564 | } |
| 10565 | |
| 10566 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 10567 | uint32_t start_reg = single_regs ? dwarf_s0 : dwarf_d0; |
| 10568 | |
| 10569 | context.type = eContextRegisterLoad; |
| 10570 | |
| 10571 | // for r = 0 to regs-1 |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10572 | for (uint32_t r = 0; r < regs; ++r) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 10573 | { |
| 10574 | if (single_regs) |
| 10575 | { |
| 10576 | // S[d+r] = MemA[address,4]; address = address+4; |
| 10577 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 10578 | |
| 10579 | uint32_t data = MemARead (context, address, addr_byte_size, 0, &success); |
| 10580 | if (!success) |
| 10581 | return false; |
| 10582 | |
| 10583 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, start_reg + d + r, data)) |
| 10584 | return false; |
| 10585 | |
| 10586 | address = address + 4; |
| 10587 | } |
| 10588 | else |
| 10589 | { |
| 10590 | // word1 = MemA[address,4]; word2 = MemA[address+4,4]; address = address+8; |
| 10591 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 10592 | uint32_t word1 = MemARead (context, address, addr_byte_size, 0, &success); |
| 10593 | if (!success) |
| 10594 | return false; |
| 10595 | |
| 10596 | context.SetRegisterPlusOffset (base_reg, (address + 4) - Rn); |
| 10597 | uint32_t word2 = MemARead (context, address + 4, addr_byte_size, 0, &success); |
| 10598 | if (!success) |
| 10599 | return false; |
| 10600 | |
| 10601 | address = address + 8; |
| 10602 | // // Combine the word-aligned words in the correct order for current endianness. |
| 10603 | // D[d+r] = if BigEndian() then word1:word2 else word2:word1; |
| 10604 | uint64_t data; |
| 10605 | if (m_byte_order == eByteOrderBig) |
| 10606 | { |
| 10607 | data = word1; |
| 10608 | data = (data << 32) | word2; |
| 10609 | } |
| 10610 | else |
| 10611 | { |
| 10612 | data = word2; |
| 10613 | data = (data << 32) | word1; |
| 10614 | } |
| 10615 | |
| 10616 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, start_reg + d + r, data)) |
| 10617 | return false; |
| 10618 | } |
| 10619 | } |
| 10620 | } |
| 10621 | return true; |
| 10622 | } |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10623 | |
| 10624 | // A8.6.399 VSTM |
Caroline Tice | 917ad35 | 2011-03-31 05:05:30 +0000 | [diff] [blame] | 10625 | // Vector Store Multiple stores multiple extension registers to consecutive memory locations using an address from an |
| 10626 | // ARM core register. |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10627 | bool |
| 10628 | EmulateInstructionARM::EmulateVSTM (const uint32_t opcode, const ARMEncoding encoding) |
| 10629 | { |
| 10630 | #if 0 |
| 10631 | if ConditionPassed() then |
| 10632 | EncodingSpecificOperations(); CheckVFPEnabled(TRUE); NullCheckIfThumbEE(n); |
| 10633 | address = if add then R[n] else R[n]-imm32; |
| 10634 | if wback then R[n] = if add then R[n}+imm32 else R[n]-imm32; |
| 10635 | for r = 0 to regs-1 |
| 10636 | if single_regs then |
| 10637 | MemA[address,4] = S[d+r]; address = address+4; |
| 10638 | else |
| 10639 | // Store as two word-aligned words in the correct order for current endianness. |
| 10640 | MemA[address,4] = if BigEndian() then D[d+r]<63:32> else D[d+r]<31:0>; |
| 10641 | MemA[address+4,4] = if BigEndian() then D[d+r]<31:0> else D[d+r]<63:32>; |
| 10642 | address = address+8; |
| 10643 | #endif |
| 10644 | |
| 10645 | bool success = false; |
| 10646 | |
| 10647 | if (ConditionPassed (opcode)) |
| 10648 | { |
| 10649 | bool single_regs; |
| 10650 | bool add; |
| 10651 | bool wback; |
| 10652 | uint32_t d; |
| 10653 | uint32_t n; |
| 10654 | uint32_t imm32; |
| 10655 | uint32_t regs; |
| 10656 | |
| 10657 | switch (encoding) |
| 10658 | { |
| 10659 | case eEncodingT1: |
| 10660 | case eEncodingA1: |
| 10661 | // if P == ‘0’ && U == ‘0’ && W == ‘0’ then SEE “Related encodings”; |
| 10662 | // if P == ‘1’ && U == ‘0’ && W == ‘1’ && Rn == ‘1101’ then SEE VPUSH; |
| 10663 | // if P == ‘1’ && W == ‘0’ then SEE VSTR; |
| 10664 | // if P == U && W == ‘1’ then UNDEFINED; |
| 10665 | if ((Bit32 (opcode, 24) == Bit32 (opcode, 23)) && BitIsSet (opcode, 21)) |
| 10666 | return false; |
| 10667 | |
| 10668 | // // Remaining combinations are PUW = 010 (IA without !), 011 (IA with !), 101 (DB with !) |
| 10669 | // single_regs = FALSE; add = (U == ‘1’); wback = (W == ‘1’); |
| 10670 | single_regs = false; |
| 10671 | add = BitIsSet (opcode, 23); |
| 10672 | wback = BitIsSet (opcode, 21); |
| 10673 | |
| 10674 | // d = UInt(D:Vd); n = UInt(Rn); imm32 = ZeroExtend(imm8:’00’, 32); |
| 10675 | d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12); |
| 10676 | n = Bits32 (opcode, 19, 16); |
| 10677 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 10678 | |
| 10679 | // regs = UInt(imm8) DIV 2; // If UInt(imm8) is odd, see “FSTMX”. |
| 10680 | regs = Bits32 (opcode, 7, 0) / 2; |
| 10681 | |
| 10682 | // if n == 15 && (wback || CurrentInstrSet() != InstrSet_ARM) then UNPREDICTABLE; |
| 10683 | if ((n == 15) && (wback || (CurrentInstrSet() != eModeARM))) |
| 10684 | return false; |
| 10685 | |
| 10686 | // if regs == 0 || regs > 16 || (d+regs) > 32 then UNPREDICTABLE; |
| 10687 | if ((regs == 0) || (regs > 16) || ((d + regs) > 32)) |
| 10688 | return false; |
| 10689 | |
| 10690 | break; |
| 10691 | |
| 10692 | case eEncodingT2: |
| 10693 | case eEncodingA2: |
| 10694 | // if P == ‘0’ && U == ‘0’ && W == ‘0’ then SEE “Related encodings”; |
| 10695 | // if P == ‘1’ && U == ‘0’ && W == ‘1’ && Rn == ‘1101’ then SEE VPUSH; |
| 10696 | // if P == ‘1’ && W == ‘0’ then SEE VSTR; |
| 10697 | // if P == U && W == ‘1’ then UNDEFINED; |
| 10698 | if ((Bit32 (opcode, 24) == Bit32 (opcode, 23)) && BitIsSet (opcode, 21)) |
| 10699 | return false; |
| 10700 | |
| 10701 | // // Remaining combinations are PUW = 010 (IA without !), 011 (IA with !), 101 (DB with !) |
| 10702 | // single_regs = TRUE; add = (U == ‘1’); wback = (W == ‘1’); d = UInt(Vd:D); n = UInt(Rn); |
| 10703 | single_regs = true; |
| 10704 | add = BitIsSet (opcode, 23); |
| 10705 | wback = BitIsSet (opcode, 21); |
| 10706 | d = (Bits32 (opcode, 15, 12) << 1) | Bit32 (opcode, 22); |
| 10707 | n = Bits32 (opcode, 19, 16); |
| 10708 | |
| 10709 | // imm32 = ZeroExtend(imm8:’00’, 32); regs = UInt(imm8); |
| 10710 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 10711 | regs = Bits32 (opcode, 7, 0); |
| 10712 | |
| 10713 | // if n == 15 && (wback || CurrentInstrSet() != InstrSet_ARM) then UNPREDICTABLE; |
| 10714 | if ((n == 15) && (wback || (CurrentInstrSet () != eModeARM))) |
| 10715 | return false; |
| 10716 | |
| 10717 | // if regs == 0 || (d+regs) > 32 then UNPREDICTABLE; |
| 10718 | if ((regs == 0) || ((d + regs) > 32)) |
| 10719 | return false; |
| 10720 | |
| 10721 | break; |
| 10722 | |
| 10723 | default: |
| 10724 | return false; |
| 10725 | } |
| 10726 | |
| 10727 | Register base_reg; |
| 10728 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 10729 | |
| 10730 | uint32_t Rn = ReadCoreReg (n, &success); |
| 10731 | if (!success) |
| 10732 | return false; |
| 10733 | |
| 10734 | // address = if add then R[n] else R[n]-imm32; |
| 10735 | addr_t address; |
| 10736 | if (add) |
| 10737 | address = Rn; |
| 10738 | else |
| 10739 | address = Rn - imm32; |
| 10740 | |
| 10741 | EmulateInstruction::Context context; |
| 10742 | // if wback then R[n] = if add then R[n}+imm32 else R[n]-imm32; |
| 10743 | if (wback) |
| 10744 | { |
| 10745 | uint32_t value; |
| 10746 | if (add) |
| 10747 | value = Rn + imm32; |
| 10748 | else |
| 10749 | value = Rn - imm32; |
| 10750 | |
| 10751 | context.type = eContextAdjustBaseRegister; |
| 10752 | context.SetRegisterPlusOffset (base_reg, value - Rn); |
| 10753 | |
| 10754 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, value)) |
| 10755 | return false; |
| 10756 | } |
| 10757 | |
| 10758 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 10759 | uint32_t start_reg = single_regs ? dwarf_s0 : dwarf_d0; |
| 10760 | |
| 10761 | context.type = eContextRegisterStore; |
| 10762 | // for r = 0 to regs-1 |
| 10763 | for (int r = 0; r < regs; ++r) |
| 10764 | { |
| 10765 | Register data_reg; |
| 10766 | data_reg.SetRegister (eRegisterKindDWARF, 0); |
| 10767 | if (single_regs) |
| 10768 | { |
| 10769 | // MemA[address,4] = S[d+r]; address = address+4; |
| 10770 | uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, start_reg + d + r, 0, &success); |
| 10771 | if (!success) |
| 10772 | return false; |
| 10773 | |
| 10774 | data_reg.num = start_reg + d + r; |
| 10775 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 10776 | if (!MemAWrite (context, address, data, addr_byte_size)) |
| 10777 | return false; |
| 10778 | |
| 10779 | address = address + 4; |
| 10780 | } |
| 10781 | else |
| 10782 | { |
| 10783 | // // Store as two word-aligned words in the correct order for current endianness. |
| 10784 | // MemA[address,4] = if BigEndian() then D[d+r]<63:32> else D[d+r]<31:0>; |
| 10785 | // MemA[address+4,4] = if BigEndian() then D[d+r]<31:0> else D[d+r]<63:32>; |
| 10786 | uint64_t data = ReadRegisterUnsigned (eRegisterKindDWARF, start_reg + d + r, 0, &success); |
| 10787 | if (!success) |
| 10788 | return false; |
| 10789 | |
| 10790 | data_reg.num = start_reg + d + r; |
| 10791 | |
| 10792 | if (m_byte_order == eByteOrderBig) |
| 10793 | { |
| 10794 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 10795 | if (!MemAWrite (context, address, Bits64 (data, 63, 32), addr_byte_size)) |
| 10796 | return false; |
| 10797 | |
| 10798 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, (address + 4) - Rn); |
| 10799 | if (!MemAWrite (context, address+ 4, Bits64 (data, 31, 0), addr_byte_size)) |
| 10800 | return false; |
| 10801 | } |
| 10802 | else |
| 10803 | { |
| 10804 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 10805 | if (!MemAWrite (context, address, Bits64 (data, 31, 0), addr_byte_size)) |
| 10806 | return false; |
| 10807 | |
| 10808 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, (address + 4) - Rn); |
| 10809 | if (!MemAWrite (context, address + 4, Bits64 (data, 63, 32), addr_byte_size)) |
| 10810 | return false; |
| 10811 | } |
| 10812 | // address = address+8; |
| 10813 | address = address + 8; |
| 10814 | } |
| 10815 | } |
| 10816 | } |
| 10817 | return true; |
| 10818 | } |
| 10819 | |
Caroline Tice | 917ad35 | 2011-03-31 05:05:30 +0000 | [diff] [blame] | 10820 | // A8.6.320 |
| 10821 | // This instruciton loads a single extension register fronm memory, using an address from an ARM core register, with |
| 10822 | // an optional offset. |
| 10823 | bool |
| 10824 | EmulateInstructionARM::EmulateVLDR (const uint32_t opcode, ARMEncoding encoding) |
| 10825 | { |
| 10826 | #if 0 |
| 10827 | if ConditionPassed() then |
| 10828 | EncodingSpecificOperations(); CheckVFPEnabled(TRUE); NullCheckIfThumbEE(n); |
| 10829 | base = if n == 15 then Align(PC,4) else R[n]; |
| 10830 | address = if add then (base + imm32) else (base - imm32); |
| 10831 | if single_reg then |
| 10832 | S[d] = MemA[address,4]; |
| 10833 | else |
| 10834 | word1 = MemA[address,4]; word2 = MemA[address+4,4]; |
| 10835 | // Combine the word-aligned words in the correct order for current endianness. |
| 10836 | D[d] = if BigEndian() then word1:word2 else word2:word1; |
| 10837 | #endif |
| 10838 | |
| 10839 | bool success = false; |
| 10840 | |
| 10841 | if (ConditionPassed (opcode)) |
| 10842 | { |
| 10843 | bool single_reg; |
| 10844 | bool add; |
| 10845 | uint32_t imm32; |
| 10846 | uint32_t d; |
| 10847 | uint32_t n; |
| 10848 | |
| 10849 | switch (encoding) |
| 10850 | { |
| 10851 | case eEncodingT1: |
| 10852 | case eEncodingA1: |
| 10853 | // single_reg = FALSE; add = (U == ‘1’); imm32 = ZeroExtend(imm8:’00’, 32); |
| 10854 | single_reg = false; |
| 10855 | add = BitIsSet (opcode, 23); |
| 10856 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 10857 | |
| 10858 | // d = UInt(D:Vd); n = UInt(Rn); |
| 10859 | d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12); |
| 10860 | n = Bits32 (opcode, 19, 16); |
| 10861 | |
| 10862 | break; |
| 10863 | |
| 10864 | case eEncodingT2: |
| 10865 | case eEncodingA2: |
| 10866 | // single_reg = TRUE; add = (U == ‘1’); imm32 = ZeroExtend(imm8:’00’, 32); |
| 10867 | single_reg = true; |
| 10868 | add = BitIsSet (opcode, 23); |
| 10869 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 10870 | |
| 10871 | // d = UInt(Vd:D); n = UInt(Rn); |
| 10872 | d = (Bits32 (opcode, 15, 12) << 1) | Bit32 (opcode, 22); |
| 10873 | n = Bits32 (opcode, 19, 16); |
| 10874 | |
| 10875 | break; |
| 10876 | |
| 10877 | default: |
| 10878 | return false; |
| 10879 | } |
| 10880 | Register base_reg; |
| 10881 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 10882 | |
| 10883 | uint32_t Rn = ReadCoreReg (n, &success); |
| 10884 | if (!success) |
| 10885 | return false; |
| 10886 | |
| 10887 | // base = if n == 15 then Align(PC,4) else R[n]; |
| 10888 | uint32_t base; |
| 10889 | if (n == 15) |
| 10890 | base = AlignPC (Rn); |
| 10891 | else |
| 10892 | base = Rn; |
| 10893 | |
| 10894 | // address = if add then (base + imm32) else (base - imm32); |
| 10895 | addr_t address; |
| 10896 | if (add) |
| 10897 | address = base + imm32; |
| 10898 | else |
| 10899 | address = base - imm32; |
| 10900 | |
| 10901 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 10902 | uint32_t start_reg = single_reg ? dwarf_s0 : dwarf_d0; |
| 10903 | |
| 10904 | EmulateInstruction::Context context; |
| 10905 | context.type = eContextRegisterLoad; |
| 10906 | context.SetRegisterPlusOffset (base_reg, address - base); |
Caroline Tice | bf5a66b | 2011-03-31 03:26:23 +0000 | [diff] [blame] | 10907 | |
Caroline Tice | 917ad35 | 2011-03-31 05:05:30 +0000 | [diff] [blame] | 10908 | if (single_reg) |
| 10909 | { |
| 10910 | // S[d] = MemA[address,4]; |
| 10911 | uint32_t data = MemARead (context, address, addr_byte_size, 0, &success); |
| 10912 | if (!success) |
| 10913 | return false; |
| 10914 | |
| 10915 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, start_reg + d, data)) |
| 10916 | return false; |
| 10917 | } |
| 10918 | else |
| 10919 | { |
| 10920 | // word1 = MemA[address,4]; word2 = MemA[address+4,4]; |
| 10921 | uint32_t word1 = MemARead (context, address, addr_byte_size, 0, &success); |
| 10922 | if (!success) |
| 10923 | return false; |
| 10924 | |
| 10925 | context.SetRegisterPlusOffset (base_reg, (address + 4) - base); |
| 10926 | uint32_t word2 = MemARead (context, address + 4, addr_byte_size, 0, &success); |
| 10927 | if (!success) |
| 10928 | return false; |
| 10929 | // // Combine the word-aligned words in the correct order for current endianness. |
| 10930 | // D[d] = if BigEndian() then word1:word2 else word2:word1; |
| 10931 | uint64_t data64; |
| 10932 | if (m_byte_order == eByteOrderBig) |
| 10933 | { |
| 10934 | data64 = word1; |
| 10935 | data64 = (data64 << 32) | word2; |
| 10936 | } |
| 10937 | else |
| 10938 | { |
| 10939 | data64 = word2; |
| 10940 | data64 = (data64 << 32) | word1; |
| 10941 | } |
| 10942 | |
| 10943 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, start_reg + d, data64)) |
| 10944 | return false; |
| 10945 | } |
| 10946 | } |
| 10947 | return true; |
| 10948 | } |
Caroline Tice | 424652f | 2011-03-31 05:38:36 +0000 | [diff] [blame] | 10949 | |
| 10950 | // A8.6.400 VSTR |
| 10951 | // This instruction stores a signle extension register to memory, using an address from an ARM core register, with an |
| 10952 | // optional offset. |
| 10953 | bool |
| 10954 | EmulateInstructionARM::EmulateVSTR (const uint32_t opcode, ARMEncoding encoding) |
| 10955 | { |
| 10956 | #if 0 |
| 10957 | if ConditionPassed() then |
| 10958 | EncodingSpecificOperations(); CheckVFPEnabled(TRUE); NullCheckIfThumbEE(n); |
| 10959 | address = if add then (R[n] + imm32) else (R[n] - imm32); |
| 10960 | if single_reg then |
| 10961 | MemA[address,4] = S[d]; |
| 10962 | else |
| 10963 | // Store as two word-aligned words in the correct order for current endianness. |
| 10964 | MemA[address,4] = if BigEndian() then D[d]<63:32> else D[d]<31:0>; |
| 10965 | MemA[address+4,4] = if BigEndian() then D[d]<31:0> else D[d]<63:32>; |
| 10966 | #endif |
| 10967 | |
| 10968 | bool success = false; |
| 10969 | |
| 10970 | if (ConditionPassed (opcode)) |
| 10971 | { |
| 10972 | bool single_reg; |
| 10973 | bool add; |
| 10974 | uint32_t imm32; |
| 10975 | uint32_t d; |
| 10976 | uint32_t n; |
| 10977 | |
| 10978 | switch (encoding) |
| 10979 | { |
| 10980 | case eEncodingT1: |
| 10981 | case eEncodingA1: |
| 10982 | // single_reg = FALSE; add = (U == ‘1’); imm32 = ZeroExtend(imm8:’00’, 32); |
| 10983 | single_reg = false; |
| 10984 | add = BitIsSet (opcode, 23); |
| 10985 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 10986 | |
| 10987 | // d = UInt(D:Vd); n = UInt(Rn); |
| 10988 | d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12); |
| 10989 | n = Bits32 (opcode, 19, 16); |
| 10990 | |
| 10991 | // if n == 15 && CurrentInstrSet() != InstrSet_ARM then UNPREDICTABLE; |
| 10992 | if ((n == 15) && (CurrentInstrSet() != eModeARM)) |
| 10993 | return false; |
| 10994 | |
| 10995 | break; |
| 10996 | |
| 10997 | case eEncodingT2: |
| 10998 | case eEncodingA2: |
| 10999 | // single_reg = TRUE; add = (U == ‘1’); imm32 = ZeroExtend(imm8:’00’, 32); |
| 11000 | single_reg = true; |
| 11001 | add = BitIsSet (opcode, 23); |
| 11002 | imm32 = Bits32 (opcode, 7, 0) << 2; |
| 11003 | |
| 11004 | // d = UInt(Vd:D); n = UInt(Rn); |
| 11005 | d = (Bits32 (opcode, 15, 12) << 1) | Bit32 (opcode, 22); |
| 11006 | n = Bits32 (opcode, 19, 16); |
| 11007 | |
| 11008 | // if n == 15 && CurrentInstrSet() != InstrSet_ARM then UNPREDICTABLE; |
| 11009 | if ((n == 15) && (CurrentInstrSet() != eModeARM)) |
| 11010 | return false; |
| 11011 | |
| 11012 | break; |
| 11013 | |
| 11014 | default: |
| 11015 | return false; |
| 11016 | } |
| 11017 | |
| 11018 | Register base_reg; |
| 11019 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 11020 | |
| 11021 | uint32_t Rn = ReadCoreReg (n, &success); |
| 11022 | if (!success) |
| 11023 | return false; |
| 11024 | |
| 11025 | // address = if add then (R[n] + imm32) else (R[n] - imm32); |
| 11026 | addr_t address; |
| 11027 | if (add) |
| 11028 | address = Rn + imm32; |
| 11029 | else |
| 11030 | address = Rn - imm32; |
| 11031 | |
| 11032 | const uint32_t addr_byte_size = GetAddressByteSize(); |
| 11033 | uint32_t start_reg = single_reg ? dwarf_s0 : dwarf_d0; |
| 11034 | |
| 11035 | Register data_reg; |
| 11036 | data_reg.SetRegister (eRegisterKindDWARF, start_reg + d); |
| 11037 | EmulateInstruction::Context context; |
| 11038 | context.type = eContextRegisterStore; |
| 11039 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 11040 | |
| 11041 | if (single_reg) |
| 11042 | { |
| 11043 | // MemA[address,4] = S[d]; |
| 11044 | uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, start_reg + d, 0, &success); |
| 11045 | if (!success) |
| 11046 | return false; |
| 11047 | |
| 11048 | if (!MemAWrite (context, address, data, addr_byte_size)) |
| 11049 | return false; |
| 11050 | } |
| 11051 | else |
| 11052 | { |
| 11053 | // // Store as two word-aligned words in the correct order for current endianness. |
| 11054 | // MemA[address,4] = if BigEndian() then D[d]<63:32> else D[d]<31:0>; |
| 11055 | // MemA[address+4,4] = if BigEndian() then D[d]<31:0> else D[d]<63:32>; |
| 11056 | uint64_t data = ReadRegisterUnsigned (eRegisterKindDWARF, start_reg + d, 0, &success); |
| 11057 | if (!success) |
| 11058 | return false; |
| 11059 | |
| 11060 | if (m_byte_order == eByteOrderBig) |
| 11061 | { |
| 11062 | if (!MemAWrite (context, address, Bits64 (data, 63, 32), addr_byte_size)) |
| 11063 | return false; |
| 11064 | |
| 11065 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, (address + 4) - Rn); |
| 11066 | if (!MemAWrite (context, address + 4, Bits64 (data, 31, 0), addr_byte_size)) |
| 11067 | return false; |
| 11068 | } |
| 11069 | else |
| 11070 | { |
| 11071 | if (!MemAWrite (context, address, Bits64 (data, 31, 0), addr_byte_size)) |
| 11072 | return false; |
| 11073 | |
| 11074 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, (address + 4) - Rn); |
| 11075 | if (!MemAWrite (context, address + 4, Bits64 (data, 63, 32), addr_byte_size)) |
| 11076 | return false; |
| 11077 | } |
| 11078 | } |
| 11079 | } |
| 11080 | return true; |
| 11081 | } |
Caroline Tice | 9121b35 | 2011-03-31 16:41:19 +0000 | [diff] [blame] | 11082 | |
| 11083 | // A8.6.307 VLDI1 (multiple single elements) |
| 11084 | // This instruction loads elements from memory into one, two, three or four registers, without de-interleaving. Every |
| 11085 | // element of each register is loaded. |
| 11086 | bool |
| 11087 | EmulateInstructionARM::EmulateVLD1Multiple (const uint32_t opcode, ARMEncoding encoding) |
| 11088 | { |
| 11089 | #if 0 |
| 11090 | if ConditionPassed() then |
| 11091 | EncodingSpecificOperations(); CheckAdvSIMDEnabled(); NullCheckIfThumbEE(n); |
| 11092 | address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11093 | if wback then R[n] = R[n] + (if register_index then R[m] else 8*regs); |
| 11094 | for r = 0 to regs-1 |
| 11095 | for e = 0 to elements-1 |
| 11096 | Elem[D[d+r],e,esize] = MemU[address,ebytes]; |
| 11097 | address = address + ebytes; |
| 11098 | #endif |
| 11099 | |
| 11100 | bool success = false; |
| 11101 | |
| 11102 | if (ConditionPassed (opcode)) |
| 11103 | { |
| 11104 | uint32_t regs; |
| 11105 | uint32_t alignment; |
| 11106 | uint32_t ebytes; |
| 11107 | uint32_t esize; |
| 11108 | uint32_t elements; |
| 11109 | uint32_t d; |
| 11110 | uint32_t n; |
| 11111 | uint32_t m; |
| 11112 | bool wback; |
| 11113 | bool register_index; |
| 11114 | |
| 11115 | switch (encoding) |
| 11116 | { |
| 11117 | case eEncodingT1: |
| 11118 | case eEncodingA1: |
| 11119 | { |
| 11120 | // case type of |
| 11121 | // when ‘0111’ |
| 11122 | // regs = 1; if align<1> == ‘1’ then UNDEFINED; |
| 11123 | // when ‘1010’ |
| 11124 | // regs = 2; if align == ‘11’ then UNDEFINED; |
| 11125 | // when ‘0110’ |
| 11126 | // regs = 3; if align<1> == ‘1’ then UNDEFINED; |
| 11127 | // when ‘0010’ |
| 11128 | // regs = 4; |
| 11129 | // otherwise |
| 11130 | // SEE “Related encodings”; |
| 11131 | uint32_t type = Bits32 (opcode, 11, 8); |
| 11132 | uint32_t align = Bits32 (opcode, 5, 4); |
| 11133 | if (type == 7) // '0111' |
| 11134 | { |
| 11135 | regs = 1; |
| 11136 | if (BitIsSet (align, 1)) |
| 11137 | return false; |
| 11138 | } |
| 11139 | else if (type == 10) // '1010' |
| 11140 | { |
| 11141 | regs = 2; |
| 11142 | if (align == 3) |
| 11143 | return false; |
| 11144 | |
| 11145 | } |
| 11146 | else if (type == 6) // '0110' |
| 11147 | { |
| 11148 | regs = 3; |
| 11149 | if (BitIsSet (align, 1)) |
| 11150 | return false; |
| 11151 | } |
| 11152 | else if (type == 2) // '0010' |
| 11153 | { |
| 11154 | regs = 4; |
| 11155 | } |
| 11156 | else |
| 11157 | return false; |
| 11158 | |
| 11159 | // alignment = if align == ‘00’ then 1 else 4 << UInt(align); |
| 11160 | if (align == 0) |
| 11161 | alignment = 1; |
| 11162 | else |
| 11163 | alignment = 4 << align; |
| 11164 | |
| 11165 | // ebytes = 1 << UInt(size); esize = 8 * ebytes; elements = 8 DIV ebytes; |
| 11166 | ebytes = 1 << Bits32 (opcode, 7, 6); |
| 11167 | esize = 8 * ebytes; |
| 11168 | elements = 8 / ebytes; |
| 11169 | |
| 11170 | // d = UInt(D:Vd); n = UInt(Rn); m = UInt(Rm); |
| 11171 | d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12); |
| 11172 | n = Bits32 (opcode, 19, 15); |
| 11173 | m = Bits32 (opcode, 3, 0); |
| 11174 | |
| 11175 | // wback = (m != 15); register_index = (m != 15 && m != 13); |
| 11176 | wback = (m != 15); |
| 11177 | register_index = ((m != 15) && (m != 13)); |
| 11178 | |
| 11179 | // if d+regs > 32 then UNPREDICTABLE; |
| 11180 | if ((d + regs) > 32) |
| 11181 | return false; |
| 11182 | } |
| 11183 | break; |
| 11184 | |
| 11185 | default: |
| 11186 | return false; |
| 11187 | } |
| 11188 | |
| 11189 | Register base_reg; |
| 11190 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 11191 | |
| 11192 | uint32_t Rn = ReadCoreReg (n, &success); |
| 11193 | if (!success) |
| 11194 | return false; |
| 11195 | |
| 11196 | // address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11197 | addr_t address = Rn; |
| 11198 | if ((address % alignment) != 0) |
| 11199 | return false; |
| 11200 | |
| 11201 | EmulateInstruction::Context context; |
| 11202 | // if wback then R[n] = R[n] + (if register_index then R[m] else 8*regs); |
| 11203 | if (wback) |
| 11204 | { |
| 11205 | uint32_t Rm = ReadCoreReg (m, &success); |
| 11206 | if (!success) |
| 11207 | return false; |
| 11208 | |
| 11209 | uint32_t offset; |
| 11210 | if (register_index) |
| 11211 | offset = Rm; |
| 11212 | else |
| 11213 | offset = 8 * regs; |
| 11214 | |
| 11215 | uint32_t value = Rn + offset; |
| 11216 | context.type = eContextAdjustBaseRegister; |
| 11217 | context.SetRegisterPlusOffset (base_reg, offset); |
| 11218 | |
| 11219 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, value)) |
| 11220 | return false; |
| 11221 | |
| 11222 | } |
| 11223 | |
| 11224 | // for r = 0 to regs-1 |
| 11225 | for (int r = 0; r < regs; ++r) |
| 11226 | { |
| 11227 | // for e = 0 to elements-1 |
| 11228 | uint64_t assembled_data = 0; |
| 11229 | for (int e = 0; e < elements; ++e) |
| 11230 | { |
| 11231 | // Elem[D[d+r],e,esize] = MemU[address,ebytes]; |
| 11232 | context.type = eContextRegisterLoad; |
| 11233 | context.SetRegisterPlusOffset (base_reg, address - Rn); |
| 11234 | uint64_t data = MemURead (context, address, ebytes, 0, &success); |
| 11235 | if (!success) |
| 11236 | return false; |
| 11237 | |
| 11238 | assembled_data = (data << (e * esize)) | assembled_data; // New data goes to the left of existing data |
| 11239 | |
| 11240 | // address = address + ebytes; |
| 11241 | address = address + ebytes; |
| 11242 | } |
| 11243 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_d0 + d + r, assembled_data)) |
| 11244 | return false; |
| 11245 | } |
| 11246 | } |
| 11247 | return true; |
| 11248 | } |
| 11249 | |
Caroline Tice | b6281b1 | 2011-03-31 17:58:23 +0000 | [diff] [blame] | 11250 | // A8.6.308 VLD1 (single element to one lane) |
| 11251 | // |
| 11252 | bool |
| 11253 | EmulateInstructionARM::EmulateVLD1Single (const uint32_t opcode, const ARMEncoding encoding) |
| 11254 | { |
| 11255 | #if 0 |
| 11256 | if ConditionPassed() then |
| 11257 | EncodingSpecificOperations(); CheckAdvSIMDEnabled(); NullCheckIfThumbEE(n); |
| 11258 | address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11259 | if wback then R[n] = R[n] + (if register_index then R[m] else ebytes); |
| 11260 | Elem[D[d],index,esize] = MemU[address,ebytes]; |
| 11261 | #endif |
| 11262 | |
| 11263 | bool success = false; |
| 11264 | |
| 11265 | if (ConditionPassed (opcode)) |
| 11266 | { |
| 11267 | uint32_t ebytes; |
| 11268 | uint32_t esize; |
| 11269 | uint32_t index; |
| 11270 | uint32_t alignment; |
| 11271 | uint32_t d; |
| 11272 | uint32_t n; |
| 11273 | uint32_t m; |
| 11274 | bool wback; |
| 11275 | bool register_index; |
| 11276 | |
| 11277 | switch (encoding) |
| 11278 | { |
| 11279 | case eEncodingT1: |
| 11280 | case eEncodingA1: |
| 11281 | { |
| 11282 | uint32_t size = Bits32 (opcode, 11, 10); |
| 11283 | uint32_t index_align = Bits32 (opcode, 7, 4); |
| 11284 | // if size == ‘11’ then SEE VLD1 (single element to all lanes); |
Caroline Tice | 8d24b4a | 2011-03-31 21:31:50 +0000 | [diff] [blame] | 11285 | if (size == 3) |
| 11286 | return EmulateVLD1SingleAll (opcode, encoding); |
Caroline Tice | b6281b1 | 2011-03-31 17:58:23 +0000 | [diff] [blame] | 11287 | // case size of |
| 11288 | if (size == 0) // when '00' |
| 11289 | { |
| 11290 | // if index_align<0> != ‘0’ then UNDEFINED; |
| 11291 | if (BitIsClear (index_align, 0)) |
| 11292 | return false; |
| 11293 | |
| 11294 | // ebytes = 1; esize = 8; index = UInt(index_align<3:1>); alignment = 1; |
| 11295 | ebytes = 1; |
| 11296 | esize = 8; |
| 11297 | index = Bits32 (index_align, 3, 1); |
| 11298 | alignment = 1; |
| 11299 | } |
| 11300 | else if (size == 1) // when ‘01’ |
| 11301 | { |
| 11302 | // if index_align<1> != ‘0’ then UNDEFINED; |
| 11303 | if (BitIsClear (index_align, 1)) |
| 11304 | return false; |
| 11305 | |
| 11306 | // ebytes = 2; esize = 16; index = UInt(index_align<3:2>); |
| 11307 | ebytes = 2; |
| 11308 | esize = 16; |
| 11309 | index = Bits32 (index_align, 3, 2); |
| 11310 | |
| 11311 | // alignment = if index_align<0> == ‘0’ then 1 else 2; |
| 11312 | if (BitIsClear (index_align, 0)) |
| 11313 | alignment = 1; |
| 11314 | else |
| 11315 | alignment = 2; |
| 11316 | } |
| 11317 | else if (size == 2) // when ‘10’ |
| 11318 | { |
| 11319 | // if index_align<2> != ‘0’ then UNDEFINED; |
| 11320 | if (BitIsClear (index_align, 2)) |
| 11321 | return false; |
| 11322 | |
| 11323 | // if index_align<1:0> != ‘00’ && index_align<1:0> != ‘11’ then UNDEFINED; |
| 11324 | if ((Bits32 (index_align, 1, 0) != 0) && (Bits32 (index_align, 1, 0) != 3)) |
| 11325 | return false; |
| 11326 | |
| 11327 | // ebytes = 4; esize = 32; index = UInt(index_align<3>); |
| 11328 | ebytes = 4; |
| 11329 | esize = 32; |
| 11330 | index = Bit32 (index_align, 3); |
| 11331 | |
| 11332 | // alignment = if index_align<1:0> == ‘00’ then 1 else 4; |
| 11333 | if (Bits32 (index_align, 1, 0) == 0) |
| 11334 | alignment = 1; |
| 11335 | else |
| 11336 | alignment = 4; |
| 11337 | } |
| 11338 | // d = UInt(D:Vd); n = UInt(Rn); m = UInt(Rm); |
| 11339 | d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12); |
| 11340 | n = Bits32 (opcode, 19, 16); |
| 11341 | m = Bits32 (opcode, 3, 0); |
| 11342 | |
| 11343 | // wback = (m != 15); register_index = (m != 15 && m != 13); if n == 15 then UNPREDICTABLE; |
| 11344 | wback = (m != 15); |
| 11345 | register_index = ((m != 15) && (m != 13)); |
| 11346 | |
| 11347 | if (n == 15) |
| 11348 | return false; |
| 11349 | |
| 11350 | } |
| 11351 | break; |
| 11352 | |
| 11353 | default: |
| 11354 | return false; |
| 11355 | } |
| 11356 | |
| 11357 | Register base_reg; |
| 11358 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 11359 | |
| 11360 | uint32_t Rn = ReadCoreReg (n, &success); |
| 11361 | if (!success) |
| 11362 | return false; |
| 11363 | |
| 11364 | // address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11365 | addr_t address = Rn; |
| 11366 | if ((address % alignment) != 0) |
| 11367 | return false; |
| 11368 | |
| 11369 | EmulateInstruction::Context context; |
| 11370 | // if wback then R[n] = R[n] + (if register_index then R[m] else ebytes); |
| 11371 | if (wback) |
| 11372 | { |
| 11373 | uint32_t Rm = ReadCoreReg (m, &success); |
| 11374 | if (!success) |
| 11375 | return false; |
| 11376 | |
| 11377 | uint32_t offset; |
| 11378 | if (register_index) |
| 11379 | offset = Rm; |
| 11380 | else |
| 11381 | offset = ebytes; |
| 11382 | |
| 11383 | uint32_t value = Rn + offset; |
| 11384 | |
| 11385 | context.type = eContextAdjustBaseRegister; |
| 11386 | context.SetRegisterPlusOffset (base_reg, offset); |
| 11387 | |
| 11388 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, value)) |
| 11389 | return false; |
| 11390 | } |
| 11391 | |
| 11392 | // Elem[D[d],index,esize] = MemU[address,ebytes]; |
| 11393 | uint32_t element = MemURead (context, address, esize, 0, &success); |
| 11394 | if (!success) |
| 11395 | return false; |
| 11396 | |
| 11397 | element = element << (index * esize); |
| 11398 | |
| 11399 | uint64_t reg_data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_d0 + d, 0, &success); |
| 11400 | if (!success) |
| 11401 | return false; |
| 11402 | |
| 11403 | uint64_t all_ones = -1; |
| 11404 | uint64_t mask = all_ones << ((index+1) * esize); // mask is all 1's to left of where 'element' goes, & all 0's |
| 11405 | // at element & to the right of element. |
| 11406 | if (index > 0) |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 11407 | 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] | 11408 | // now mask should be 0's where element goes & 1's |
| 11409 | // everywhere else. |
| 11410 | |
| 11411 | uint64_t masked_reg = reg_data & mask; // Take original reg value & zero out 'element' bits |
| 11412 | reg_data = masked_reg & element; // Put 'element' into those bits in reg_data. |
| 11413 | |
| 11414 | context.type = eContextRegisterLoad; |
| 11415 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + d, reg_data)) |
| 11416 | return false; |
| 11417 | } |
| 11418 | return true; |
| 11419 | } |
| 11420 | |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 11421 | // A8.6.391 VST1 (multiple single elements) |
| 11422 | // Vector Store (multiple single elements) stores elements to memory from one, two, three, or four regsiters, without |
| 11423 | // interleaving. Every element of each register is stored. |
| 11424 | bool |
| 11425 | EmulateInstructionARM::EmulateVST1Multiple (const uint32_t opcode, ARMEncoding encoding) |
| 11426 | { |
| 11427 | #if 0 |
| 11428 | if ConditionPassed() then |
| 11429 | EncodingSpecificOperations(); CheckAdvSIMDEnabled(); NullCheckIfThumbEE(n); |
| 11430 | address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11431 | if wback then R[n] = R[n] + (if register_index then R[m] else 8*regs); |
| 11432 | for r = 0 to regs-1 |
| 11433 | for e = 0 to elements-1 |
| 11434 | MemU[address,ebytes] = Elem[D[d+r],e,esize]; |
| 11435 | address = address + ebytes; |
| 11436 | #endif |
| 11437 | |
| 11438 | bool success = false; |
| 11439 | |
| 11440 | if (ConditionPassed (opcode)) |
| 11441 | { |
| 11442 | uint32_t regs; |
| 11443 | uint32_t alignment; |
| 11444 | uint32_t ebytes; |
| 11445 | uint32_t esize; |
| 11446 | uint32_t elements; |
| 11447 | uint32_t d; |
| 11448 | uint32_t n; |
| 11449 | uint32_t m; |
| 11450 | bool wback; |
| 11451 | bool register_index; |
| 11452 | |
| 11453 | switch (encoding) |
| 11454 | { |
| 11455 | case eEncodingT1: |
| 11456 | case eEncodingA1: |
| 11457 | { |
| 11458 | uint32_t type = Bits32 (opcode, 11, 8); |
| 11459 | uint32_t align = Bits32 (opcode, 5, 4); |
| 11460 | |
| 11461 | // case type of |
| 11462 | if (type == 7) // when ‘0111’ |
| 11463 | { |
| 11464 | // regs = 1; if align<1> == ‘1’ then UNDEFINED; |
| 11465 | regs = 1; |
| 11466 | if (BitIsSet (align, 1)) |
| 11467 | return false; |
| 11468 | } |
| 11469 | else if (type == 10) // when ‘1010’ |
| 11470 | { |
| 11471 | // regs = 2; if align == ‘11’ then UNDEFINED; |
| 11472 | regs = 2; |
| 11473 | if (align == 3) |
| 11474 | return false; |
| 11475 | } |
| 11476 | else if (type == 6) // when ‘0110’ |
| 11477 | { |
| 11478 | // regs = 3; if align<1> == ‘1’ then UNDEFINED; |
| 11479 | regs = 3; |
| 11480 | if (BitIsSet (align, 1)) |
| 11481 | return false; |
| 11482 | } |
| 11483 | else if (type == 2) // when ‘0010’ |
| 11484 | // regs = 4; |
| 11485 | regs = 4; |
| 11486 | else // otherwise |
| 11487 | // SEE “Related encodings”; |
| 11488 | return false; |
| 11489 | |
| 11490 | // alignment = if align == ‘00’ then 1 else 4 << UInt(align); |
| 11491 | if (align == 0) |
| 11492 | alignment = 0; |
| 11493 | else |
| 11494 | alignment = 4 << align; |
| 11495 | |
| 11496 | // ebytes = 1 << UInt(size); esize = 8 * ebytes; elements = 8 DIV ebytes; |
| 11497 | ebytes = 1 << Bits32 (opcode,7, 6); |
| 11498 | esize = 8 * ebytes; |
| 11499 | elements = 8 / ebytes; |
| 11500 | |
| 11501 | // d = UInt(D:Vd); n = UInt(Rn); m = UInt(Rm); |
| 11502 | d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12); |
| 11503 | n = Bits32 (opcode, 19, 16); |
| 11504 | m = Bits32 (opcode, 3, 0); |
| 11505 | |
| 11506 | // wback = (m != 15); register_index = (m != 15 && m != 13); |
| 11507 | wback = (m != 15); |
| 11508 | register_index = ((m != 15) && (m != 13)); |
| 11509 | |
| 11510 | // if d+regs > 32 then UNPREDICTABLE; if n == 15 then UNPREDICTABLE; |
| 11511 | if ((d + regs) > 32) |
| 11512 | return false; |
| 11513 | |
| 11514 | if (n == 15) |
| 11515 | return false; |
| 11516 | |
| 11517 | } |
| 11518 | break; |
| 11519 | |
| 11520 | default: |
| 11521 | return false; |
| 11522 | } |
| 11523 | |
| 11524 | Register base_reg; |
| 11525 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 11526 | |
| 11527 | uint32_t Rn = ReadCoreReg (n, &success); |
| 11528 | if (!success) |
| 11529 | return false; |
| 11530 | |
| 11531 | // address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11532 | addr_t address = Rn; |
| 11533 | if ((address % alignment) != 0) |
| 11534 | return false; |
| 11535 | |
| 11536 | EmulateInstruction::Context context; |
| 11537 | // if wback then R[n] = R[n] + (if register_index then R[m] else 8*regs); |
| 11538 | if (wback) |
| 11539 | { |
| 11540 | uint32_t Rm = ReadCoreReg (m, &success); |
| 11541 | if (!success) |
| 11542 | return false; |
| 11543 | |
| 11544 | uint32_t offset; |
| 11545 | if (register_index) |
| 11546 | offset = Rm; |
| 11547 | else |
| 11548 | offset = 8 * regs; |
| 11549 | |
| 11550 | context.type = eContextAdjustBaseRegister; |
| 11551 | context.SetRegisterPlusOffset (base_reg, offset); |
| 11552 | |
| 11553 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, Rn + offset)) |
| 11554 | return false; |
| 11555 | } |
| 11556 | |
| 11557 | context.type = eContextRegisterStore; |
| 11558 | Register data_reg; |
| 11559 | data_reg.SetRegister (eRegisterKindDWARF, 0); |
| 11560 | // for r = 0 to regs-1 |
| 11561 | for (int r = 0; r < regs; ++r) |
| 11562 | { |
| 11563 | data_reg.num = dwarf_d0 + d + r; |
| 11564 | uint64_t register_data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_d0 + d + r, 0, &success); |
| 11565 | if (!success) |
| 11566 | return false; |
| 11567 | |
| 11568 | // for e = 0 to elements-1 |
| 11569 | for (int e = 0; e < elements; ++e) |
| 11570 | { |
| 11571 | // MemU[address,ebytes] = Elem[D[d+r],e,esize]; |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 11572 | uint64_t word = Bits64 (register_data, ((e + 1) * esize) - 1, e * esize); |
Caroline Tice | 1e542e3 | 2011-03-31 18:44:04 +0000 | [diff] [blame] | 11573 | |
| 11574 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 11575 | if (!MemUWrite (context, address, word, ebytes)) |
| 11576 | return false; |
| 11577 | |
| 11578 | // address = address + ebytes; |
| 11579 | address = address + ebytes; |
| 11580 | } |
| 11581 | } |
| 11582 | } |
| 11583 | return true; |
| 11584 | } |
| 11585 | |
Caroline Tice | 7b88094 | 2011-03-31 19:17:12 +0000 | [diff] [blame] | 11586 | // A8.6.392 VST1 (single element from one lane) |
| 11587 | // This instruction stores one element to memory from one element of a register. |
| 11588 | bool |
| 11589 | EmulateInstructionARM::EmulateVST1Single (const uint32_t opcode, ARMEncoding encoding) |
| 11590 | { |
| 11591 | #if 0 |
| 11592 | if ConditionPassed() then |
| 11593 | EncodingSpecificOperations(); CheckAdvSIMDEnabled(); NullCheckIfThumbEE(n); |
| 11594 | address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11595 | if wback then R[n] = R[n] + (if register_index then R[m] else ebytes); |
| 11596 | MemU[address,ebytes] = Elem[D[d],index,esize]; |
| 11597 | #endif |
| 11598 | |
| 11599 | bool success = false; |
| 11600 | |
| 11601 | if (ConditionPassed (opcode)) |
| 11602 | { |
| 11603 | uint32_t ebytes; |
| 11604 | uint32_t esize; |
| 11605 | uint32_t index; |
| 11606 | uint32_t alignment; |
| 11607 | uint32_t d; |
| 11608 | uint32_t n; |
| 11609 | uint32_t m; |
| 11610 | bool wback; |
| 11611 | bool register_index; |
| 11612 | |
| 11613 | switch (encoding) |
| 11614 | { |
| 11615 | case eEncodingT1: |
| 11616 | case eEncodingA1: |
| 11617 | { |
| 11618 | uint32_t size = Bits32 (opcode, 11, 10); |
| 11619 | uint32_t index_align = Bits32 (opcode, 7, 4); |
| 11620 | |
| 11621 | // if size == ‘11’ then UNDEFINED; |
| 11622 | if (size == 3) |
| 11623 | return false; |
| 11624 | |
| 11625 | // case size of |
| 11626 | if (size == 0) // when ‘00’ |
| 11627 | { |
| 11628 | // if index_align<0> != ‘0’ then UNDEFINED; |
| 11629 | if (BitIsClear (index_align, 0)) |
| 11630 | return false; |
| 11631 | // ebytes = 1; esize = 8; index = UInt(index_align<3:1>); alignment = 1; |
| 11632 | ebytes = 1; |
| 11633 | esize = 8; |
| 11634 | index = Bits32 (index_align, 3, 1); |
| 11635 | alignment = 1; |
| 11636 | } |
| 11637 | else if (size == 1) // when ‘01’ |
| 11638 | { |
| 11639 | // if index_align<1> != ‘0’ then UNDEFINED; |
| 11640 | if (BitIsClear (index_align, 1)) |
| 11641 | return false; |
| 11642 | |
| 11643 | // ebytes = 2; esize = 16; index = UInt(index_align<3:2>); |
| 11644 | ebytes = 2; |
| 11645 | esize = 16; |
| 11646 | index = Bits32 (index_align, 3, 2); |
| 11647 | |
| 11648 | // alignment = if index_align<0> == ‘0’ then 1 else 2; |
| 11649 | if (BitIsClear (index_align, 0)) |
| 11650 | alignment = 1; |
| 11651 | else |
| 11652 | alignment = 2; |
| 11653 | } |
| 11654 | else if (size == 2) // when ‘10’ |
| 11655 | { |
| 11656 | // if index_align<2> != ‘0’ then UNDEFINED; |
| 11657 | if (BitIsClear (index_align, 2)) |
| 11658 | return false; |
| 11659 | |
| 11660 | // if index_align<1:0> != ‘00’ && index_align<1:0> != ‘11’ then UNDEFINED; |
| 11661 | if ((Bits32 (index_align, 1, 0) != 0) && (Bits32 (index_align, 1, 0) != 3)) |
| 11662 | return false; |
| 11663 | |
| 11664 | // ebytes = 4; esize = 32; index = UInt(index_align<3>); |
| 11665 | ebytes = 4; |
| 11666 | esize = 32; |
| 11667 | index = Bit32 (index_align, 3); |
| 11668 | |
| 11669 | // alignment = if index_align<1:0> == ‘00’ then 1 else 4; |
| 11670 | if (Bits32 (index_align, 1, 0) == 0) |
| 11671 | alignment = 1; |
| 11672 | else |
| 11673 | alignment = 4; |
| 11674 | } |
| 11675 | // d = UInt(D:Vd); n = UInt(Rn); m = UInt(Rm); |
| 11676 | d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12); |
| 11677 | n = Bits32 (opcode, 19, 16); |
| 11678 | m = Bits32 (opcode, 3, 0); |
| 11679 | |
| 11680 | // wback = (m != 15); register_index = (m != 15 && m != 13); if n == 15 then UNPREDICTABLE; |
| 11681 | wback = (m != 15); |
| 11682 | register_index = ((m != 15) && (m != 13)); |
| 11683 | |
| 11684 | if (n == 15) |
| 11685 | return false; |
| 11686 | } |
| 11687 | break; |
| 11688 | |
| 11689 | default: |
| 11690 | return false; |
| 11691 | } |
| 11692 | |
| 11693 | Register base_reg; |
| 11694 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n); |
| 11695 | |
| 11696 | uint32_t Rn = ReadCoreReg (n, &success); |
| 11697 | if (!success) |
| 11698 | return false; |
| 11699 | |
| 11700 | // address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11701 | addr_t address = Rn; |
| 11702 | if ((address % alignment) != 0) |
| 11703 | return false; |
| 11704 | |
| 11705 | EmulateInstruction::Context context; |
| 11706 | // if wback then R[n] = R[n] + (if register_index then R[m] else ebytes); |
| 11707 | if (wback) |
| 11708 | { |
| 11709 | uint32_t Rm = ReadCoreReg (m, &success); |
| 11710 | if (!success) |
| 11711 | return false; |
| 11712 | |
| 11713 | uint32_t offset; |
| 11714 | if (register_index) |
| 11715 | offset = Rm; |
| 11716 | else |
| 11717 | offset = ebytes; |
| 11718 | |
| 11719 | context.type = eContextAdjustBaseRegister; |
| 11720 | context.SetRegisterPlusOffset (base_reg, offset); |
| 11721 | |
| 11722 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, Rn + offset)) |
| 11723 | return false; |
| 11724 | } |
| 11725 | |
| 11726 | // MemU[address,ebytes] = Elem[D[d],index,esize]; |
| 11727 | uint64_t register_data = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_d0 + d, 0, &success); |
| 11728 | if (!success) |
| 11729 | return false; |
| 11730 | |
| 11731 | uint64_t word = Bits64 (register_data, ((index + 1) * esize) - 1, index * esize); |
| 11732 | |
| 11733 | Register data_reg; |
| 11734 | data_reg.SetRegister (eRegisterKindDWARF, dwarf_d0 + d); |
| 11735 | context.type = eContextRegisterStore; |
| 11736 | context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn); |
| 11737 | |
| 11738 | if (!MemUWrite (context, address, word, ebytes)) |
| 11739 | return false; |
| 11740 | } |
| 11741 | return true; |
| 11742 | } |
| 11743 | |
Caroline Tice | 8d24b4a | 2011-03-31 21:31:50 +0000 | [diff] [blame] | 11744 | // A8.6.309 VLD1 (single element to all lanes) |
| 11745 | // 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] | 11746 | bool |
Caroline Tice | 8d24b4a | 2011-03-31 21:31:50 +0000 | [diff] [blame] | 11747 | EmulateInstructionARM::EmulateVLD1SingleAll (const uint32_t opcode, const ARMEncoding encoding) |
Caroline Tice | 93767b8 | 2011-03-31 21:15:29 +0000 | [diff] [blame] | 11748 | { |
| 11749 | #if 0 |
| 11750 | if ConditionPassed() then |
| 11751 | EncodingSpecificOperations(); CheckAdvSIMDEnabled(); NullCheckIfThumbEE(n); |
| 11752 | address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11753 | if wback then R[n] = R[n] + (if register_index then R[m] else ebytes); |
| 11754 | replicated_element = Replicate(MemU[address,ebytes], elements); |
| 11755 | for r = 0 to regs-1 |
| 11756 | D[d+r] = replicated_element; |
| 11757 | #endif |
| 11758 | |
| 11759 | bool success = false; |
| 11760 | |
| 11761 | if (ConditionPassed (opcode)) |
| 11762 | { |
| 11763 | uint32_t ebytes; |
| 11764 | uint32_t elements; |
| 11765 | uint32_t regs; |
| 11766 | uint32_t alignment; |
| 11767 | uint32_t d; |
| 11768 | uint32_t n; |
| 11769 | uint32_t m; |
| 11770 | bool wback; |
| 11771 | bool register_index; |
| 11772 | |
| 11773 | switch (encoding) |
| 11774 | { |
| 11775 | case eEncodingT1: |
| 11776 | case eEncodingA1: |
| 11777 | { |
| 11778 | //if size == ‘11’ || (size == ‘00’ && a == ‘1’) then UNDEFINED; |
| 11779 | uint32_t size = Bits32 (opcode, 7, 6); |
| 11780 | if ((size == 3) || ((size == 0) && BitIsSet (opcode, 4))) |
| 11781 | return false; |
| 11782 | |
| 11783 | //ebytes = 1 << UInt(size); elements = 8 DIV ebytes; regs = if T == ‘0’ then 1 else 2; |
| 11784 | ebytes = 1 << size; |
| 11785 | elements = 8 / ebytes; |
| 11786 | if (BitIsClear (opcode, 5)) |
| 11787 | regs = 1; |
| 11788 | else |
| 11789 | regs = 2; |
| 11790 | |
| 11791 | //alignment = if a == ‘0’ then 1 else ebytes; |
| 11792 | if (BitIsClear (opcode, 4)) |
| 11793 | alignment = 1; |
| 11794 | else |
| 11795 | alignment = ebytes; |
| 11796 | |
| 11797 | //d = UInt(D:Vd); n = UInt(Rn); m = UInt(Rm); |
| 11798 | d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12); |
| 11799 | n = Bits32 (opcode, 19, 16); |
| 11800 | m = Bits32 (opcode, 3, 0); |
| 11801 | |
| 11802 | //wback = (m != 15); register_index = (m != 15 && m != 13); |
| 11803 | wback = (m != 15); |
| 11804 | register_index = ((m != 15) && (m != 13)); |
| 11805 | |
| 11806 | //if d+regs > 32 then UNPREDICTABLE; if n == 15 then UNPREDICTABLE; |
| 11807 | if ((d + regs) > 32) |
| 11808 | return false; |
| 11809 | |
| 11810 | if (n == 15) |
| 11811 | return false; |
| 11812 | } |
| 11813 | break; |
| 11814 | |
| 11815 | default: |
| 11816 | break; |
| 11817 | } |
| 11818 | |
| 11819 | Register base_reg; |
| 11820 | base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 +n); |
| 11821 | |
| 11822 | uint32_t Rn = ReadCoreReg (n, &success); |
| 11823 | if (!success) |
| 11824 | return false; |
| 11825 | |
| 11826 | // address = R[n]; if (address MOD alignment) != 0 then GenerateAlignmentException(); |
| 11827 | addr_t address = Rn; |
| 11828 | if ((address % alignment) != 0) |
| 11829 | return false; |
| 11830 | |
| 11831 | EmulateInstruction::Context context; |
| 11832 | // if wback then R[n] = R[n] + (if register_index then R[m] else ebytes); |
| 11833 | if (wback) |
| 11834 | { |
| 11835 | uint32_t Rm = ReadCoreReg (m, &success); |
| 11836 | if (!success) |
| 11837 | return false; |
| 11838 | |
| 11839 | uint32_t offset; |
| 11840 | if (register_index) |
| 11841 | offset = Rm; |
| 11842 | else |
| 11843 | offset = ebytes; |
| 11844 | |
| 11845 | context.type = eContextAdjustBaseRegister; |
| 11846 | context.SetRegisterPlusOffset (base_reg, offset); |
| 11847 | |
| 11848 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, Rn + offset)) |
| 11849 | return false; |
| 11850 | } |
| 11851 | |
| 11852 | // replicated_element = Replicate(MemU[address,ebytes], elements); |
| 11853 | |
| 11854 | context.type = eContextRegisterLoad; |
| 11855 | uint64_t word = MemURead (context, address, ebytes, 0, &success); |
| 11856 | if (!success) |
| 11857 | return false; |
| 11858 | |
| 11859 | uint64_t replicated_element; |
| 11860 | uint32_t esize = ebytes * 8; |
| 11861 | for (int e = 0; e < elements; ++e) |
| 11862 | replicated_element = (replicated_element << esize) | Bits64 (word, esize - 1, 0); |
| 11863 | |
| 11864 | // for r = 0 to regs-1 |
| 11865 | for (int r = 0; r < regs; ++r) |
| 11866 | { |
| 11867 | // D[d+r] = replicated_element; |
| 11868 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_d0 + d + r, replicated_element)) |
| 11869 | return false; |
| 11870 | } |
| 11871 | } |
| 11872 | return true; |
| 11873 | } |
| 11874 | |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 11875 | // B6.2.13 SUBS PC, LR and related instructions |
| 11876 | //The SUBS PC, LR, #<const? instruction provides an exception return without the use of the stack. It subtracts the |
| 11877 | // immediate constant from the LR, branches to the resulting address, and also copies the SPSR to the CPSR. |
| 11878 | bool |
| 11879 | EmulateInstructionARM::EmulateSUBSPcLrEtc (const uint32_t opcode, const ARMEncoding encoding) |
| 11880 | { |
| 11881 | #if 0 |
| 11882 | if ConditionPassed() then |
| 11883 | EncodingSpecificOperations(); |
| 11884 | if CurrentInstrSet() == InstrSet_ThumbEE then |
| 11885 | UNPREDICTABLE; |
| 11886 | operand2 = if register_form then Shift(R[m], shift_t, shift_n, APSR.C) else imm32; |
| 11887 | case opcode of |
| 11888 | when ‘0000’ result = R[n] AND operand2; // AND |
| 11889 | when ‘0001’ result = R[n] EOR operand2; // EOR |
| 11890 | when ‘0010’ (result, -, -) = AddWithCarry(R[n], NOT(operand2), ‘1’); // SUB |
| 11891 | when ‘0011’ (result, -, -) = AddWithCarry(NOT(R[n]), operand2, ‘1’); // RSB |
| 11892 | when ‘0100’ (result, -, -) = AddWithCarry(R[n], operand2, ‘0’); // ADD |
| 11893 | when ‘0101’ (result, -, -) = AddWithCarry(R[n], operand2, APSR.c); // ADC |
| 11894 | when ‘0110’ (result, -, -) = AddWithCarry(R[n], NOT(operand2), APSR.C); // SBC |
| 11895 | when ‘0111’ (result, -, -) = AddWithCarry(NOT(R[n]), operand2, APSR.C); // RSC |
| 11896 | when ‘1100’ result = R[n] OR operand2; // ORR |
| 11897 | when ‘1101’ result = operand2; // MOV |
| 11898 | when ‘1110’ result = R[n] AND NOT(operand2); // BIC |
| 11899 | when ‘1111’ result = NOT(operand2); // MVN |
| 11900 | CPSRWriteByInstr(SPSR[], ‘1111’, TRUE); |
| 11901 | BranchWritePC(result); |
| 11902 | #endif |
| 11903 | |
| 11904 | bool success = false; |
| 11905 | |
| 11906 | if (ConditionPassed (opcode)) |
| 11907 | { |
| 11908 | uint32_t n; |
| 11909 | uint32_t m; |
| 11910 | uint32_t imm32; |
| 11911 | bool register_form; |
| 11912 | ARM_ShifterType shift_t; |
| 11913 | uint32_t shift_n; |
| 11914 | uint32_t code; |
| 11915 | |
| 11916 | switch (encoding) |
| 11917 | { |
| 11918 | case eEncodingT1: |
| 11919 | // if CurrentInstrSet() == InstrSet_ThumbEE then UNPREDICTABLE |
| 11920 | // n = 14; imm32 = ZeroExtend(imm8, 32); register_form = FALSE; opcode = ‘0010’; // = SUB |
| 11921 | n = 14; |
| 11922 | imm32 = Bits32 (opcode, 7, 0); |
| 11923 | register_form = false; |
| 11924 | code = 2; |
| 11925 | |
| 11926 | // if InITBlock() && !LastInITBlock() then UNPREDICTABLE; |
| 11927 | if (InITBlock() && !LastInITBlock()) |
| 11928 | return false; |
| 11929 | |
| 11930 | break; |
| 11931 | |
| 11932 | case eEncodingA1: |
| 11933 | // n = UInt(Rn); imm32 = ARMExpandImm(imm12); register_form = FALSE; |
| 11934 | n = Bits32 (opcode, 19, 16); |
| 11935 | imm32 = ARMExpandImm (opcode); |
| 11936 | register_form = false; |
| 11937 | code = Bits32 (opcode, 24, 21); |
| 11938 | |
| 11939 | break; |
| 11940 | |
| 11941 | case eEncodingA2: |
| 11942 | // n = UInt(Rn); m = UInt(Rm); register_form = TRUE; |
| 11943 | n = Bits32 (opcode, 19, 16); |
| 11944 | m = Bits32 (opcode, 3, 0); |
| 11945 | register_form = true; |
| 11946 | |
| 11947 | // (shift_t, shift_n) = DecodeImmShift(type, imm5); |
| 11948 | shift_n = DecodeImmShiftARM (opcode, shift_t); |
| 11949 | |
| 11950 | break; |
| 11951 | |
| 11952 | default: |
| 11953 | return false; |
| 11954 | } |
| 11955 | |
| 11956 | // operand2 = if register_form then Shift(R[m], shift_t, shift_n, APSR.C) else imm32; |
| 11957 | uint32_t operand2; |
| 11958 | if (register_form) |
| 11959 | { |
| 11960 | uint32_t Rm = ReadCoreReg (m, &success); |
| 11961 | if (!success) |
| 11962 | return false; |
| 11963 | |
| 11964 | operand2 = Shift (Rm, shift_t, shift_n, APSR_C); |
| 11965 | |
| 11966 | } |
| 11967 | else |
| 11968 | { |
| 11969 | operand2 = imm32; |
| 11970 | } |
| 11971 | |
| 11972 | uint32_t Rn = ReadCoreReg (n, &success); |
| 11973 | if (!success) |
| 11974 | return false; |
| 11975 | |
| 11976 | AddWithCarryResult result; |
| 11977 | |
| 11978 | // case opcode of |
| 11979 | switch (code) |
| 11980 | { |
| 11981 | case 0: // when ‘0000’ |
| 11982 | // result = R[n] AND operand2; // AND |
| 11983 | result.result = Rn & operand2; |
| 11984 | break; |
| 11985 | |
| 11986 | case 1: // when ‘0001’ |
| 11987 | // result = R[n] EOR operand2; // EOR |
| 11988 | result.result = Rn ^ operand2; |
| 11989 | break; |
| 11990 | |
| 11991 | case 2: // when ‘0010’ |
| 11992 | // (result, -, -) = AddWithCarry(R[n], NOT(operand2), ‘1’); // SUB |
| 11993 | result = AddWithCarry (Rn, ~(operand2), 1); |
| 11994 | break; |
| 11995 | |
| 11996 | case 3: // when ‘0011’ |
| 11997 | // (result, -, -) = AddWithCarry(NOT(R[n]), operand2, ‘1’); // RSB |
| 11998 | result = AddWithCarry (~(Rn), operand2, 1); |
| 11999 | break; |
| 12000 | |
| 12001 | case 4: // when ‘0100’ |
| 12002 | // (result, -, -) = AddWithCarry(R[n], operand2, ‘0’); // ADD |
| 12003 | result = AddWithCarry (Rn, operand2, 0); |
| 12004 | break; |
| 12005 | |
| 12006 | case 5: // when ‘0101’ |
| 12007 | // (result, -, -) = AddWithCarry(R[n], operand2, APSR.c); // ADC |
| 12008 | result = AddWithCarry (Rn, operand2, APSR_C); |
| 12009 | break; |
| 12010 | |
| 12011 | case 6: // when ‘0110’ |
| 12012 | // (result, -, -) = AddWithCarry(R[n], NOT(operand2), APSR.C); // SBC |
| 12013 | result = AddWithCarry (Rn, ~(operand2), APSR_C); |
| 12014 | break; |
| 12015 | |
| 12016 | case 7: // when ‘0111’ |
| 12017 | // (result, -, -) = AddWithCarry(NOT(R[n]), operand2, APSR.C); // RSC |
| 12018 | result = AddWithCarry (~(Rn), operand2, APSR_C); |
| 12019 | break; |
| 12020 | |
| 12021 | case 10: // when ‘1100’ |
| 12022 | // result = R[n] OR operand2; // ORR |
| 12023 | result.result = Rn | operand2; |
| 12024 | break; |
| 12025 | |
| 12026 | case 11: // when ‘1101’ |
| 12027 | // result = operand2; // MOV |
| 12028 | result.result = operand2; |
| 12029 | break; |
| 12030 | |
| 12031 | case 12: // when ‘1110’ |
| 12032 | // result = R[n] AND NOT(operand2); // BIC |
| 12033 | result.result = Rn & ~(operand2); |
| 12034 | break; |
| 12035 | |
| 12036 | case 15: // when ‘1111’ |
| 12037 | // result = NOT(operand2); // MVN |
| 12038 | result.result = ~(operand2); |
| 12039 | break; |
| 12040 | |
| 12041 | default: |
| 12042 | return false; |
| 12043 | } |
| 12044 | // CPSRWriteByInstr(SPSR[], ‘1111’, TRUE); |
| 12045 | |
| 12046 | // For now, in emulation mode, we don't have access to the SPSR, so we will use the CPSR instead, and hope for |
| 12047 | // the best. |
| 12048 | uint32_t spsr = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_cpsr, 0, &success); |
| 12049 | if (!success) |
| 12050 | return false; |
| 12051 | |
| 12052 | CPSRWriteByInstr (spsr, 15, true); |
| 12053 | |
| 12054 | // BranchWritePC(result); |
| 12055 | EmulateInstruction::Context context; |
| 12056 | context.type = eContextAdjustPC; |
| 12057 | context.SetImmediate (result.result); |
| 12058 | |
| 12059 | BranchWritePC (context, result.result); |
| 12060 | } |
| 12061 | return true; |
| 12062 | } |
| 12063 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12064 | EmulateInstructionARM::ARMOpcode* |
| 12065 | EmulateInstructionARM::GetARMOpcodeForInstruction (const uint32_t opcode) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12066 | { |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12067 | static ARMOpcode |
| 12068 | g_arm_opcodes[] = |
| 12069 | { |
| 12070 | //---------------------------------------------------------------------- |
| 12071 | // Prologue instructions |
| 12072 | //---------------------------------------------------------------------- |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 12073 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12074 | // push register(s) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12075 | { 0x0fff0000, 0x092d0000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulatePUSH, "push <registers>" }, |
| 12076 | { 0x0fff0fff, 0x052d0004, ARMvAll, eEncodingA2, No_VFP, eSize32, &EmulateInstructionARM::EmulatePUSH, "push <register>" }, |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 12077 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12078 | // set r7 to point to a stack offset |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12079 | { 0x0ffff000, 0x028d7000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateADDRdSPImm, "add r7, sp, #<const>" }, |
| 12080 | { 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] | 12081 | // copy the stack pointer to ip |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12082 | { 0x0fffffff, 0x01a0c00d, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateMOVRdSP, "mov ip, sp" }, |
| 12083 | { 0x0ffff000, 0x028dc000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateADDRdSPImm, "add ip, sp, #<const>" }, |
| 12084 | { 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] | 12085 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12086 | // adjust the stack pointer |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12087 | { 0x0ffff000, 0x024dd000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBSPImm, "sub sp, sp, #<const>"}, |
| 12088 | { 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] | 12089 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12090 | // push one register |
| 12091 | // if Rn == '1101' && imm12 == '000000000100' then SEE PUSH; |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12092 | { 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] | 12093 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12094 | // vector push consecutive extension register(s) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12095 | { 0x0fbf0f00, 0x0d2d0b00, ARMV6T2_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateVPUSH, "vpush.64 <list>"}, |
| 12096 | { 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] | 12097 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12098 | //---------------------------------------------------------------------- |
Johnny Chen | 587a0a4 | 2011-02-01 18:35:28 +0000 | [diff] [blame] | 12099 | // Epilogue instructions |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12100 | //---------------------------------------------------------------------- |
Johnny Chen | ef85e91 | 2011-01-31 23:07:40 +0000 | [diff] [blame] | 12101 | |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12102 | { 0x0fff0000, 0x08bd0000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulatePOP, "pop <registers>"}, |
| 12103 | { 0x0fff0fff, 0x049d0004, ARMvAll, eEncodingA2, No_VFP, eSize32, &EmulateInstructionARM::EmulatePOP, "pop <register>"}, |
| 12104 | { 0x0fbf0f00, 0x0cbd0b00, ARMV6T2_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateVPOP, "vpop.64 <list>"}, |
| 12105 | { 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] | 12106 | |
| 12107 | //---------------------------------------------------------------------- |
| 12108 | // Supervisor Call (previously Software Interrupt) |
| 12109 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12110 | { 0x0f000000, 0x0f000000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSVC, "svc #imm24"}, |
Johnny Chen | 3b620b3 | 2011-02-07 20:11:47 +0000 | [diff] [blame] | 12111 | |
| 12112 | //---------------------------------------------------------------------- |
| 12113 | // Branch instructions |
| 12114 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12115 | { 0x0f000000, 0x0a000000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateB, "b #imm24"}, |
Johnny Chen | 383d629 | 2011-02-11 21:23:32 +0000 | [diff] [blame] | 12116 | // To resolve ambiguity, "blx <label>" should come before "bl <label>". |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12117 | { 0xfe000000, 0xfa000000, ARMV5_ABOVE, eEncodingA2, No_VFP, eSize32, &EmulateInstructionARM::EmulateBLXImmediate, "blx <label>"}, |
| 12118 | { 0x0f000000, 0x0b000000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateBLXImmediate, "bl <label>"}, |
| 12119 | { 0x0ffffff0, 0x012fff30, ARMV5_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateBLXRm, "blx <Rm>"}, |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 12120 | // for example, "bx lr" |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12121 | { 0x0ffffff0, 0x012fff10, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateBXRm, "bx <Rm>"}, |
Johnny Chen | 59e6ab7 | 2011-02-24 21:01:20 +0000 | [diff] [blame] | 12122 | // bxj |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12123 | { 0x0ffffff0, 0x012fff20, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateBXJRm, "bxj <Rm>"}, |
Johnny Chen | b77be41 | 2011-02-04 00:40:18 +0000 | [diff] [blame] | 12124 | |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 12125 | //---------------------------------------------------------------------- |
Johnny Chen | 28070c3 | 2011-02-12 01:27:26 +0000 | [diff] [blame] | 12126 | // Data-processing instructions |
| 12127 | //---------------------------------------------------------------------- |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 12128 | // adc (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12129 | { 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] | 12130 | // adc (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12131 | { 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] | 12132 | // add (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12133 | { 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] | 12134 | // add (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12135 | { 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] | 12136 | // add (register-shifted register) |
Caroline Tice | 0fe5a53 | 2011-04-08 23:33:06 +0000 | [diff] [blame] | 12137 | { 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] | 12138 | // adr |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12139 | { 0x0fff0000, 0x028f0000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateADR, "add<c> <Rd>, PC, #<const>"}, |
| 12140 | { 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] | 12141 | // and (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12142 | { 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] | 12143 | // and (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12144 | { 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] | 12145 | // bic (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12146 | { 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] | 12147 | // bic (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12148 | { 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] | 12149 | // eor (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12150 | { 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] | 12151 | // eor (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12152 | { 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] | 12153 | // orr (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12154 | { 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] | 12155 | // orr (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12156 | { 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] | 12157 | // rsb (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12158 | { 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] | 12159 | // rsb (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12160 | { 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] | 12161 | // rsc (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12162 | { 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] | 12163 | // rsc (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12164 | { 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] | 12165 | // sbc (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12166 | { 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] | 12167 | // sbc (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12168 | { 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] | 12169 | // sub (immediate, ARM) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12170 | { 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] | 12171 | // sub (sp minus immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12172 | { 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] | 12173 | // sub (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12174 | { 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] | 12175 | // teq (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12176 | { 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] | 12177 | // teq (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12178 | { 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] | 12179 | // tst (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12180 | { 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] | 12181 | // tst (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12182 | { 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] | 12183 | |
Caroline Tice | 89c6d58 | 2011-03-29 19:53:44 +0000 | [diff] [blame] | 12184 | // mov (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12185 | { 0x0fef0000, 0x03a00000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateMOVRdImm, "mov{s}<c> <Rd>, #<const>"}, |
| 12186 | { 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] | 12187 | // mov (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12188 | { 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] | 12189 | // mvn (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12190 | { 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] | 12191 | // mvn (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12192 | { 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] | 12193 | // cmn (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12194 | { 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] | 12195 | // cmn (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12196 | { 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] | 12197 | // cmp (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12198 | { 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] | 12199 | // cmp (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12200 | { 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] | 12201 | // asr (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12202 | { 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] | 12203 | // asr (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12204 | { 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] | 12205 | // lsl (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12206 | { 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] | 12207 | // lsl (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12208 | { 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] | 12209 | // lsr (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12210 | { 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] | 12211 | // lsr (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12212 | { 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] | 12213 | // rrx is a special case encoding of ror (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12214 | { 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] | 12215 | // ror (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12216 | { 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] | 12217 | // ror (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12218 | { 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] | 12219 | // mul |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12220 | { 0x0fe000f0, 0x00000090, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateMUL, "mul{s}<c> <Rd>,<R>,<Rm>" }, |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12221 | { 0x0e10f000, 0x0210f000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBSPcLrEtc, "<opc>S<c> PC,#<const> | <Rn>,#<const>" }, |
| 12222 | { 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] | 12223 | |
| 12224 | //---------------------------------------------------------------------- |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 12225 | // Load instructions |
| 12226 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12227 | { 0x0fd00000, 0x08900000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDM, "ldm<c> <Rn>{!} <registers>" }, |
| 12228 | { 0x0fd00000, 0x08100000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDMDA, "ldmda<c> <Rn>{!} <registers>" }, |
| 12229 | { 0x0fd00000, 0x09100000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDMDB, "ldmdb<c> <Rn>{!} <registers>" }, |
| 12230 | { 0x0fd00000, 0x09900000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDMIB, "ldmib<c> <Rn<{!} <registers>" }, |
| 12231 | { 0x0e500000, 0x04100000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRImmediateARM, "ldr<c> <Rt> [<Rn> {#+/-<imm12>}]" }, |
| 12232 | { 0x0e500010, 0x06100000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRRegister, "ldr<c> <Rt> [<Rn> +/-<Rm> {<shift>}] {!}" }, |
| 12233 | { 0x0e5f0000, 0x045f0000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRBLiteral, "ldrb<c> <Rt>, [...]"}, |
| 12234 | { 0xfe500010, 0x06500000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRBRegister, "ldrb<c> <Rt>, [<Rn>,+/-<Rm>{, <shift>}]{!}" }, |
| 12235 | { 0x0e5f00f0, 0x005f00b0, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRHLiteral, "ldrh<c> <Rt>, <label>" }, |
| 12236 | { 0x0e5000f0, 0x001000b0, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRHRegister, "ldrh<c> <Rt>,[<Rn>,+/-<Rm>]{!}" }, |
| 12237 | { 0x0e5000f0, 0x005000d0, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSBImmediate, "ldrsb<c> <Rt>, [<Rn>{,#+/-<imm8>}]" }, |
| 12238 | { 0x0e5f00f0, 0x005f00d0, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSBLiteral, "ldrsb<c> <Rt> <label>" }, |
| 12239 | { 0x0e5000f0, 0x001000d0, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSBRegister, "ldrsb<c> <Rt>,[<Rn>,+/-<Rm>]{!}" }, |
| 12240 | { 0x0e5000f0, 0x005000f0, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSHImmediate, "ldrsh<c> <Rt>,[<Rn>{,#+/-<imm8>}]"}, |
| 12241 | { 0x0e5f00f0, 0x005f00f0, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSHLiteral, "ldrsh<c> <Rt>,<label>" }, |
| 12242 | { 0x0e5000f0, 0x001000f0, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSHRegister, "ldrsh<c> <Rt>,[<Rn>,+/-<Rm>]{!}" }, |
| 12243 | { 0x0e5000f0, 0x004000d0, ARMV5TE_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRDImmediate, "ldrd<c> <Rt>, <Rt2>, [<Rn>,#+/-<imm8>]!"}, |
| 12244 | { 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] | 12245 | { 0x0e100f00, 0x0c100b00, ARMvAll, eEncodingA1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVLDM, "vldm{mode}<c> <Rn>{!}, <list>"}, |
| 12246 | { 0x0e100f00, 0x0c100a00, ARMvAll, eEncodingA2, VFPv2v3, eSize32, &EmulateInstructionARM::EmulateVLDM, "vldm{mode}<c> <Rn>{!}, <list>"}, |
| 12247 | { 0x0f300f00, 0x0d100b00, ARMvAll, eEncodingA1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVLDR, "vldr<c> <Dd>, [<Rn>{,#+/-<imm>}]"}, |
| 12248 | { 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] | 12249 | { 0xffb00000, 0xf4200000, ARMvAll, eEncodingA1, AdvancedSIMD, eSize32, &EmulateInstructionARM::EmulateVLD1Multiple, "vld1<c>.<size> <list>, [<Rn>{@<align>}], <Rm>"}, |
| 12250 | { 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] | 12251 | { 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] | 12252 | |
| 12253 | //---------------------------------------------------------------------- |
| 12254 | // Store instructions |
| 12255 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12256 | { 0x0fd00000, 0x08800000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTM, "stm<c> <Rn>{!} <registers>" }, |
| 12257 | { 0x0fd00000, 0x08000000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTMDA, "stmda<c> <Rn>{!} <registers>" }, |
| 12258 | { 0x0fd00000, 0x09000000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTMDB, "stmdb<c> <Rn>{!} <registers>" }, |
| 12259 | { 0x0fd00000, 0x09800000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTMIB, "stmib<c> <Rn>{!} <registers>" }, |
| 12260 | { 0x0e500010, 0x06000000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRRegister, "str<c> <Rt> [<Rn> +/-<Rm> {<shift>}]{!}" }, |
| 12261 | { 0x0e5000f0, 0x000000b0, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRHRegister, "strh<c> <Rt>,[<Rn>,+/-<Rm>[{!}" }, |
| 12262 | { 0x0ff00ff0, 0x01800f90, ARMV6_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTREX, "strex<c> <Rd>, <Rt>, [<Rn>]"}, |
| 12263 | { 0x0e500000, 0x04400000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRBImmARM, "strb<c> <Rt>,[<Rn>,#+/-<imm12>]!"}, |
| 12264 | { 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] | 12265 | { 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] | 12266 | { 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] | 12267 | { 0x0e100f00, 0x0c000b00, ARMvAll, eEncodingA1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVSTM, "vstm{mode}<c> <Rn>{!} <list>"}, |
| 12268 | { 0x0e100f00, 0x0c000a00, ARMvAll, eEncodingA2, VFPv2v3, eSize32, &EmulateInstructionARM::EmulateVSTM, "vstm{mode}<c> <Rn>{!} <list>"}, |
| 12269 | { 0x0f300f00, 0x0d000b00, ARMvAll, eEncodingA1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVSTR, "vstr<c> <Dd> [<Rn>{,#+/-<imm>}]"}, |
| 12270 | { 0x0f300f00, 0x0d000a00, ARMvAll, eEncodingA2, VFPv2v3, eSize32, &EmulateInstructionARM::EmulateVSTR, "vstr<c> <Sd> [<Rn>{,#+/-<imm>}]"}, |
| 12271 | { 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] | 12272 | { 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] | 12273 | |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 12274 | //---------------------------------------------------------------------- |
| 12275 | // Other instructions |
| 12276 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12277 | { 0x0fff00f0, 0x06af00f0, ARMV6_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSXTB, "sxtb<c> <Rd>,<Rm>{,<rotation>}" }, |
| 12278 | { 0x0fff00f0, 0x06bf0070, ARMV6_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSXTH, "sxth<c> <Rd>,<Rm>{,<rotation>}" }, |
| 12279 | { 0x0fff00f0, 0x06ef0070, ARMV6_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateUXTB, "uxtb<c> <Rd>,<Rm>{,<rotation>}" }, |
| 12280 | { 0x0fff00f0, 0x06ff0070, ARMV6_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateUXTH, "uxth<c> <Rd>,<Rm>{,<rotation>}" }, |
| 12281 | { 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] | 12282 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12283 | }; |
| 12284 | static const size_t k_num_arm_opcodes = sizeof(g_arm_opcodes)/sizeof(ARMOpcode); |
| 12285 | |
| 12286 | for (size_t i=0; i<k_num_arm_opcodes; ++i) |
| 12287 | { |
| 12288 | if ((g_arm_opcodes[i].mask & opcode) == g_arm_opcodes[i].value) |
| 12289 | return &g_arm_opcodes[i]; |
| 12290 | } |
| 12291 | return NULL; |
| 12292 | } |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12293 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12294 | |
| 12295 | EmulateInstructionARM::ARMOpcode* |
| 12296 | EmulateInstructionARM::GetThumbOpcodeForInstruction (const uint32_t opcode) |
Johnny Chen | 347320d | 2011-01-24 23:40:59 +0000 | [diff] [blame] | 12297 | { |
Johnny Chen | fdd179e | 2011-01-31 20:09:28 +0000 | [diff] [blame] | 12298 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12299 | static ARMOpcode |
| 12300 | g_thumb_opcodes[] = |
| 12301 | { |
| 12302 | //---------------------------------------------------------------------- |
| 12303 | // Prologue instructions |
| 12304 | //---------------------------------------------------------------------- |
Johnny Chen | bcec3af | 2011-01-27 01:26:19 +0000 | [diff] [blame] | 12305 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12306 | // push register(s) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12307 | { 0xfffffe00, 0x0000b400, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulatePUSH, "push <registers>" }, |
| 12308 | { 0xffff0000, 0xe92d0000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulatePUSH, "push.w <registers>" }, |
| 12309 | { 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] | 12310 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12311 | // set r7 to point to a stack offset |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12312 | { 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] | 12313 | // copy the stack pointer to r7 |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12314 | { 0xffffffff, 0x0000466f, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateMOVRdSP, "mov r7, sp" }, |
Johnny Chen | e7cf420 | 2011-02-10 18:13:23 +0000 | [diff] [blame] | 12315 | // 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] | 12316 | { 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] | 12317 | |
Johnny Chen | 864a8e8 | 2011-02-18 00:07:39 +0000 | [diff] [blame] | 12318 | // PC-relative load into register (see also EmulateADDSPRm) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12319 | { 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] | 12320 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12321 | // adjust the stack pointer |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12322 | { 0xffffff87, 0x00004485, ARMvAll, eEncodingT2, No_VFP, eSize16, &EmulateInstructionARM::EmulateADDSPRm, "add sp, <Rm>"}, |
| 12323 | { 0xffffff80, 0x0000b080, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSUBSPImm, "sub sp, sp, #imm"}, |
| 12324 | { 0xfbef8f00, 0xf1ad0d00, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBSPImm, "sub.w sp, sp, #<const>"}, |
| 12325 | { 0xfbff8f00, 0xf2ad0d00, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBSPImm, "subw sp, sp, #imm12"}, |
| 12326 | { 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] | 12327 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12328 | // vector push consecutive extension register(s) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12329 | { 0xffbf0f00, 0xed2d0b00, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateVPUSH, "vpush.64 <list>"}, |
| 12330 | { 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] | 12331 | |
Greg Clayton | 2b8e8b0 | 2011-02-01 00:49:32 +0000 | [diff] [blame] | 12332 | //---------------------------------------------------------------------- |
| 12333 | // Epilogue instructions |
| 12334 | //---------------------------------------------------------------------- |
Johnny Chen | 347320d | 2011-01-24 23:40:59 +0000 | [diff] [blame] | 12335 | |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12336 | { 0xfffff800, 0x0000a800, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateADDSPImm, "add<c> <Rd>, sp, #imm"}, |
| 12337 | { 0xffffff80, 0x0000b000, ARMvAll, eEncodingT2, No_VFP, eSize16, &EmulateInstructionARM::EmulateADDSPImm, "add sp, #imm"}, |
| 12338 | { 0xfffffe00, 0x0000bc00, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulatePOP, "pop <registers>"}, |
| 12339 | { 0xffff0000, 0xe8bd0000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulatePOP, "pop.w <registers>" }, |
| 12340 | { 0xffff0fff, 0xf85d0d04, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulatePOP, "pop.w <register>" }, |
| 12341 | { 0xffbf0f00, 0xecbd0b00, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateVPOP, "vpop.64 <list>"}, |
| 12342 | { 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] | 12343 | |
| 12344 | //---------------------------------------------------------------------- |
| 12345 | // Supervisor Call (previously Software Interrupt) |
| 12346 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12347 | { 0xffffff00, 0x0000df00, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSVC, "svc #imm8"}, |
Johnny Chen | c315f86 | 2011-02-05 00:46:10 +0000 | [diff] [blame] | 12348 | |
| 12349 | //---------------------------------------------------------------------- |
| 12350 | // If Then makes up to four following instructions conditional. |
| 12351 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12352 | { 0xffffff00, 0x0000bf00, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateIT, "it{<x>{<y>{<z>}}} <firstcond>"}, |
Johnny Chen | 3b620b3 | 2011-02-07 20:11:47 +0000 | [diff] [blame] | 12353 | |
| 12354 | //---------------------------------------------------------------------- |
| 12355 | // Branch instructions |
| 12356 | //---------------------------------------------------------------------- |
| 12357 | // To resolve ambiguity, "b<c> #imm8" should come after "svc #imm8". |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12358 | { 0xfffff000, 0x0000d000, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateB, "b<c> #imm8 (outside IT)"}, |
| 12359 | { 0xfffff800, 0x0000e000, ARMvAll, eEncodingT2, No_VFP, eSize16, &EmulateInstructionARM::EmulateB, "b<c> #imm11 (outside or last in IT)"}, |
| 12360 | { 0xf800d000, 0xf0008000, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateB, "b<c>.w #imm8 (outside IT)"}, |
| 12361 | { 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] | 12362 | // J1 == J2 == 1 |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12363 | { 0xf800d000, 0xf000d000, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateBLXImmediate, "bl <label>"}, |
Johnny Chen | 383d629 | 2011-02-11 21:23:32 +0000 | [diff] [blame] | 12364 | // J1 == J2 == 1 |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12365 | { 0xf800d001, 0xf000c000, ARMV5_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateBLXImmediate, "blx <label>"}, |
| 12366 | { 0xffffff87, 0x00004780, ARMV5_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateBLXRm, "blx <Rm>"}, |
Johnny Chen | ab3b351 | 2011-02-12 00:10:51 +0000 | [diff] [blame] | 12367 | // for example, "bx lr" |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12368 | { 0xffffff87, 0x00004700, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateBXRm, "bx <Rm>"}, |
Johnny Chen | 59e6ab7 | 2011-02-24 21:01:20 +0000 | [diff] [blame] | 12369 | // bxj |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12370 | { 0xfff0ffff, 0xf3c08f00, ARMV5J_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateBXJRm, "bxj <Rm>"}, |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 12371 | // compare and branch |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12372 | { 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] | 12373 | // table branch byte |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12374 | { 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] | 12375 | // table branch halfword |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12376 | { 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] | 12377 | |
| 12378 | //---------------------------------------------------------------------- |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 12379 | // Data-processing instructions |
| 12380 | //---------------------------------------------------------------------- |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 12381 | // adc (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12382 | { 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] | 12383 | // adc (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12384 | { 0xffffffc0, 0x00004140, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateADCReg, "adcs|adc<c> <Rdn>, <Rm>"}, |
| 12385 | { 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] | 12386 | // add (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12387 | { 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] | 12388 | // 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] | 12389 | { 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] | 12390 | // adr |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12391 | { 0xfffff800, 0x0000a000, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateADR, "add<c> <Rd>, PC, #<const>"}, |
| 12392 | { 0xfbff8000, 0xf2af0000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateADR, "sub<c> <Rd>, PC, #<const>"}, |
| 12393 | { 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] | 12394 | // and (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12395 | { 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] | 12396 | // and (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12397 | { 0xffffffc0, 0x00004000, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateANDReg, "ands|and<c> <Rdn>, <Rm>"}, |
| 12398 | { 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] | 12399 | // bic (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12400 | { 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] | 12401 | // bic (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12402 | { 0xffffffc0, 0x00004380, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateBICReg, "bics|bic<c> <Rdn>, <Rm>"}, |
| 12403 | { 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] | 12404 | // eor (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12405 | { 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] | 12406 | // eor (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12407 | { 0xffffffc0, 0x00004040, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateEORReg, "eors|eor<c> <Rdn>, <Rm>"}, |
| 12408 | { 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] | 12409 | // orr (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12410 | { 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] | 12411 | // orr (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12412 | { 0xffffffc0, 0x00004300, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateORRReg, "orrs|orr<c> <Rdn>, <Rm>"}, |
| 12413 | { 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] | 12414 | // rsb (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12415 | { 0xffffffc0, 0x00004240, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateRSBImm, "rsbs|rsb<c> <Rd>, <Rn>, #0"}, |
| 12416 | { 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] | 12417 | // rsb (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12418 | { 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] | 12419 | // sbc (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12420 | { 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] | 12421 | // sbc (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12422 | { 0xffffffc0, 0x00004180, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSBCReg, "sbcs|sbc<c> <Rdn>, <Rm>"}, |
| 12423 | { 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] | 12424 | // add (immediate, Thumb) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12425 | { 0xfffffe00, 0x00001c00, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateADDImmThumb, "adds|add<c> <Rd>,<Rn>,#<imm3>" }, |
| 12426 | { 0xfffff800, 0x00003000, ARMV4T_ABOVE, eEncodingT2, No_VFP, eSize16, &EmulateInstructionARM::EmulateADDImmThumb, "adds|add<c> <Rdn>,#<imm8>" }, |
| 12427 | { 0xfbe08000, 0xf1000000, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateADDImmThumb, "add{s}<c>.w <Rd>,<Rn>,#<const>" }, |
| 12428 | { 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] | 12429 | // sub (immediate, Thumb) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12430 | { 0xfffffe00, 0x00001e00, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSUBImmThumb, "subs|sub<c> <Rd>, <Rn> #imm3"}, |
| 12431 | { 0xfffff800, 0x00003800, ARMvAll, eEncodingT2, No_VFP, eSize16, &EmulateInstructionARM::EmulateSUBImmThumb, "subs|sub<c> <Rdn>, #imm8"}, |
| 12432 | { 0xfbe08000, 0xf1a00000, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBImmThumb, "sub{s}<c>.w <Rd>, <Rn>, #<const>"}, |
| 12433 | { 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] | 12434 | // sub (sp minus immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12435 | { 0xfbef8000, 0xf1ad0000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSUBSPImm, "sub{s}.w <Rd>, sp, #<const>"}, |
| 12436 | { 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] | 12437 | // sub (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12438 | { 0xfffffe00, 0x00001a00, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSUBReg, "subs|sub<c> <Rd>, <Rn>, <Rm>"}, |
| 12439 | { 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] | 12440 | // teq (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12441 | { 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] | 12442 | // teq (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12443 | { 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] | 12444 | // tst (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12445 | { 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] | 12446 | // tst (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12447 | { 0xffffffc0, 0x00004200, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateTSTReg, "tst<c> <Rdn>, <Rm>"}, |
| 12448 | { 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] | 12449 | |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 12450 | |
Johnny Chen | 338bf54 | 2011-02-10 19:29:03 +0000 | [diff] [blame] | 12451 | // move from high register to high register |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12452 | { 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] | 12453 | // move from low register to low register |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12454 | { 0xffffffc0, 0x00000000, ARMvAll, eEncodingT2, No_VFP, eSize16, &EmulateInstructionARM::EmulateMOVRdRm, "movs <Rd>, <Rm>"}, |
Johnny Chen | 7c5234d | 2011-02-18 23:41:11 +0000 | [diff] [blame] | 12455 | // mov{s}<c>.w <Rd>, <Rm> |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12456 | { 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] | 12457 | // move immediate |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12458 | { 0xfffff800, 0x00002000, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateMOVRdImm, "movs|mov<c> <Rd>, #imm8"}, |
| 12459 | { 0xfbef8000, 0xf04f0000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateMOVRdImm, "mov{s}<c>.w <Rd>, #<const>"}, |
| 12460 | { 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] | 12461 | // mvn (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12462 | { 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] | 12463 | // mvn (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12464 | { 0xffffffc0, 0x000043c0, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateMVNReg, "mvns|mvn<c> <Rd>, <Rm>"}, |
| 12465 | { 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] | 12466 | // cmn (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12467 | { 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] | 12468 | // cmn (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12469 | { 0xffffffc0, 0x000042c0, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateCMNReg, "cmn<c> <Rn>, <Rm>"}, |
| 12470 | { 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] | 12471 | // cmp (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12472 | { 0xfffff800, 0x00002800, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateCMPImm, "cmp<c> <Rn>, #imm8"}, |
| 12473 | { 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] | 12474 | // cmp (register) (Rn and Rm both from r0-r7) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12475 | { 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] | 12476 | // cmp (register) (Rn and Rm not both from r0-r7) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12477 | { 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] | 12478 | // asr (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12479 | { 0xfffff800, 0x00001000, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateASRImm, "asrs|asr<c> <Rd>, <Rm>, #imm"}, |
| 12480 | { 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] | 12481 | // asr (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12482 | { 0xffffffc0, 0x00004100, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateASRReg, "asrs|asr<c> <Rdn>, <Rm>"}, |
| 12483 | { 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] | 12484 | // lsl (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12485 | { 0xfffff800, 0x00000000, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLSLImm, "lsls|lsl<c> <Rd>, <Rm>, #imm"}, |
| 12486 | { 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] | 12487 | // lsl (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12488 | { 0xffffffc0, 0x00004080, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLSLReg, "lsls|lsl<c> <Rdn>, <Rm>"}, |
| 12489 | { 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] | 12490 | // lsr (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12491 | { 0xfffff800, 0x00000800, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLSRImm, "lsrs|lsr<c> <Rd>, <Rm>, #imm"}, |
| 12492 | { 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] | 12493 | // lsr (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12494 | { 0xffffffc0, 0x000040c0, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLSRReg, "lsrs|lsr<c> <Rdn>, <Rm>"}, |
| 12495 | { 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] | 12496 | // rrx is a special case encoding of ror (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12497 | { 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] | 12498 | // ror (immediate) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12499 | { 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] | 12500 | // ror (register) |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12501 | { 0xffffffc0, 0x000041c0, ARMvAll, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateRORReg, "rors|ror<c> <Rdn>, <Rm>"}, |
| 12502 | { 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] | 12503 | // mul |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12504 | { 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] | 12505 | // mul |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12506 | { 0xfff0f0f0, 0xfb00f000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateMUL, "mul<c> <Rd>,<Rn>,<Rm>" }, |
Caroline Tice | 1f954f5 | 2011-04-11 15:51:10 +0000 | [diff] [blame] | 12507 | { 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] | 12508 | |
| 12509 | |
| 12510 | //---------------------------------------------------------------------- |
| 12511 | // RFE instructions *** IMPORTANT *** THESE MUST BE LISTED **BEFORE** THE LDM.. Instructions in this table; |
| 12512 | // otherwise the wrong instructions will be selected. |
| 12513 | //---------------------------------------------------------------------- |
Caroline Tice | 6bf6516 | 2011-03-03 17:42:58 +0000 | [diff] [blame] | 12514 | |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12515 | { 0xffd0ffff, 0xe810c000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateRFE, "rfedb<c> <Rn>{!}" }, |
| 12516 | { 0xffd0ffff, 0xe990c000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateRFE, "rfe{ia}<c> <Rn>{!}" }, |
| 12517 | |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 12518 | //---------------------------------------------------------------------- |
Caroline Tice | b9f76c3 | 2011-02-08 22:24:38 +0000 | [diff] [blame] | 12519 | // Load instructions |
| 12520 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12521 | { 0xfffff800, 0x0000c800, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDM, "ldm<c> <Rn>{!} <registers>" }, |
| 12522 | { 0xffd02000, 0xe8900000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDM, "ldm<c>.w <Rn>{!} <registers>" }, |
| 12523 | { 0xffd00000, 0xe9100000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDMDB, "ldmdb<c> <Rn>{!} <registers>" }, |
| 12524 | { 0xfffff800, 0x00006800, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRRtRnImm, "ldr<c> <Rt>, [<Rn>{,#imm}]"}, |
| 12525 | { 0xfffff800, 0x00009800, ARMV4T_ABOVE, eEncodingT2, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRRtRnImm, "ldr<c> <Rt>, [SP{,#imm}]"}, |
| 12526 | { 0xfff00000, 0xf8d00000, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRRtRnImm, "ldr<c>.w <Rt>, [<Rn>{,#imm12}]"}, |
| 12527 | { 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] | 12528 | // Thumb2 PC-relative load into register |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12529 | { 0xff7f0000, 0xf85f0000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRRtPCRelative, "ldr<c>.w <Rt>, [PC, +/-#imm}]"}, |
| 12530 | { 0xfffffe00, 0x00005800, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRRegister, "ldr<c> <Rt>, [<Rn>, <Rm>]" }, |
| 12531 | { 0xfff00fc0, 0xf8500000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRRegister, "ldr<c>.w <Rt>, [<Rn>,<Rm>{,LSL #<imm2>}]" }, |
| 12532 | { 0xfffff800, 0x00007800, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRBImmediate, "ldrb<c> <Rt>,[<Rn>{,#<imm5>}]" }, |
| 12533 | { 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] | 12534 | { 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] | 12535 | { 0xff7f0000, 0xf81f0000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRBLiteral, "ldrb<c> <Rt>,[...]" }, |
| 12536 | { 0xfffffe00, 0x00005c00, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRBRegister, "ldrb<c> <Rt>,[<Rn>,<Rm>]" }, |
| 12537 | { 0xfff00fc0, 0xf8100000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRBRegister, "ldrb<c>.w <Rt>,[<Rn>,<Rm>{,LSL #imm2>}]" }, |
| 12538 | { 0xfffff800, 0x00008800, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRHImmediate, "ldrh<c> <Rt>, [<Rn>{,#<imm>}]" }, |
| 12539 | { 0xfff00000, 0xf8b00000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRHImmediate, "ldrh<c>.w <Rt>,[<Rn>{,#<imm12>}]" }, |
| 12540 | { 0xfff00800, 0xf8300800, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRHImmediate, "ldrh<c> <Rt>,[<Rn>,#+/-<imm8>]{!}" }, |
| 12541 | { 0xff7f0000, 0xf83f0000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRHLiteral, "ldrh<c> <Rt>, <label>" }, |
| 12542 | { 0xfffffe00, 0x00005a00, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRHRegister, "ldrh<c> <Rt>, [<Rn>,<Rm>]" }, |
| 12543 | { 0xfff00fc0, 0xf8300000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRHRegister, "ldrh<c>.w <Rt>,[<Rn>,<Rm>{,LSL #<imm2>}]" }, |
| 12544 | { 0xfff00000, 0xf9900000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSBImmediate, "ldrsb<c> <Rt>,[<Rn>,#<imm12>]" }, |
| 12545 | { 0xfff00800, 0xf9100800, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSBImmediate, "ldrsb<c> <Rt>,[<Rn>,#+/-<imm8>]" }, |
| 12546 | { 0xff7f0000, 0xf91f0000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSBLiteral, "ldrsb<c> <Rt>, <label>" }, |
| 12547 | { 0xfffffe00, 0x00005600, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRSBRegister, "ldrsb<c> <Rt>,[<Rn>,<Rm>]" }, |
| 12548 | { 0xfff00fc0, 0xf9100000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSBRegister, "ldrsb<c>.w <Rt>,[<Rn>,<Rm>{,LSL #imm2>}]" }, |
| 12549 | { 0xfff00000, 0xf9b00000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSHImmediate, "ldrsh<c> <Rt>,[<Rn>,#<imm12>]" }, |
| 12550 | { 0xfff00800, 0xf9300800, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSHImmediate, "ldrsh<c> <Rt>,[<Rn>,#+/-<imm8>]" }, |
| 12551 | { 0xff7f0000, 0xf93f0000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRSHLiteral, "ldrsh<c> <Rt>,<label>" }, |
| 12552 | { 0xfffffe00, 0x00005e00, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateLDRSHRegister, "ldrsh<c> <Rt>,[<Rn>,<Rm>]" }, |
| 12553 | { 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] | 12554 | { 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] | 12555 | { 0xfe100f00, 0xec100b00, ARMvAll, eEncodingT1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVLDM, "vldm{mode}<c> <Rn>{!}, <list>"}, |
| 12556 | { 0xfe100f00, 0xec100a00, ARMvAll, eEncodingT2, VFPv2v3, eSize32, &EmulateInstructionARM::EmulateVLDM, "vldm{mode}<c> <Rn>{!}, <list>" }, |
| 12557 | { 0xffe00f00, 0xed100b00, ARMvAll, eEncodingT1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVLDR, "vldr<c> <Dd>, [<Rn>{,#+/-<imm>}]"}, |
| 12558 | { 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] | 12559 | { 0xffb00000, 0xf9200000, ARMvAll, eEncodingT1, AdvancedSIMD, eSize32, &EmulateInstructionARM::EmulateVLD1Multiple, "vld1<c>.<size> <list>, [<Rn>{@<align>}],<Rm>"}, |
| 12560 | { 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] | 12561 | { 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] | 12562 | |
| 12563 | //---------------------------------------------------------------------- |
| 12564 | // Store instructions |
| 12565 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12566 | { 0xfffff800, 0x0000c000, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSTM, "stm<c> <Rn>{!} <registers>" }, |
| 12567 | { 0xffd00000, 0xe8800000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTM, "stm<c>.w <Rn>{!} <registers>" }, |
| 12568 | { 0xffd00000, 0xe9000000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTMDB, "stmdb<c> <Rn>{!} <registers>" }, |
| 12569 | { 0xfffff800, 0x00006000, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSTRThumb, "str<c> <Rt>, [<Rn>{,#<imm>}]" }, |
| 12570 | { 0xfffff800, 0x00009000, ARMV4T_ABOVE, eEncodingT2, No_VFP, eSize16, &EmulateInstructionARM::EmulateSTRThumb, "str<c> <Rt>, [SP,#<imm>]" }, |
| 12571 | { 0xfff00000, 0xf8c00000, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRThumb, "str<c>.w <Rt>, [<Rn>,#<imm12>]" }, |
| 12572 | { 0xfff00800, 0xf8400800, ARMV6T2_ABOVE, eEncodingT4, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRThumb, "str<c> <Rt>, [<Rn>,#+/-<imm8>]" }, |
| 12573 | { 0xfffffe00, 0x00005000, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSTRRegister, "str<c> <Rt> ,{<Rn>, <Rm>]" }, |
| 12574 | { 0xfff00fc0, 0xf8400000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRRegister, "str<c>.w <Rt>, [<Rn>, <Rm> {lsl #imm2>}]" }, |
| 12575 | { 0xfffff800, 0x00007000, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSTRBThumb, "strb<c> <Rt>, [<Rn>, #<imm5>]" }, |
| 12576 | { 0xfff00000, 0xf8800000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRBThumb, "strb<c>.w <Rt>, [<Rn>, #<imm12>]" }, |
| 12577 | { 0xfff00800, 0xf8000800, ARMV6T2_ABOVE, eEncodingT3, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRBThumb, "strb<c> <Rt> ,[<Rn>, #+/-<imm8>]{!}" }, |
| 12578 | { 0xfffffe00, 0x00005200, ARMV4T_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSTRHRegister, "strh<c> <Rt>,[<Rn>,<Rm>]" }, |
| 12579 | { 0xfff00fc0, 0xf8200000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRHRegister, "strh<c>.w <Rt>,[<Rn>,<Rm>{,LSL #<imm2>}]" }, |
| 12580 | { 0xfff00000, 0xe8400000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTREX, "strex<c> <Rd>, <Rt>, [<Rn{,#<imm>}]" }, |
| 12581 | { 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] | 12582 | { 0xfe100f00, 0xec000b00, ARMvAll, eEncodingT1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVSTM, "vstm{mode}<c> <Rn>{!}, <list>"}, |
| 12583 | { 0xfea00f00, 0xec000a00, ARMvAll, eEncodingT2, VFPv2v3, eSize32, &EmulateInstructionARM::EmulateVSTM, "vstm{mode}<c> <Rn>{!}, <list>"}, |
| 12584 | { 0xff300f00, 0xed000b00, ARMvAll, eEncodingT1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVSTR, "vstr<c> <Dd>, [<Rn>{,#+/-<imm>}]"}, |
| 12585 | { 0xff300f00, 0xed000a00, ARMvAll, eEncodingT2, VFPv2v3, eSize32, &EmulateInstructionARM::EmulateVSTR, "vstr<c> <Sd>, [<Rn>{,#+/-<imm>}]"}, |
| 12586 | { 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] | 12587 | { 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] | 12588 | |
| 12589 | //---------------------------------------------------------------------- |
| 12590 | // Other instructions |
| 12591 | //---------------------------------------------------------------------- |
Caroline Tice | 4f60558 | 2011-03-31 00:02:51 +0000 | [diff] [blame] | 12592 | { 0xffffffc0, 0x0000b240, ARMV6_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSXTB, "sxtb<c> <Rd>,<Rm>" }, |
| 12593 | { 0xfffff080, 0xfa4ff080, ARMV6_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSXTB, "sxtb<c>.w <Rd>,<Rm>{,<rotation>}" }, |
| 12594 | { 0xffffffc0, 0x0000b200, ARMV6_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateSXTH, "sxth<c> <Rd>,<Rm>" }, |
| 12595 | { 0xfffff080, 0xfa0ff080, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSXTH, "sxth<c>.w <Rd>,<Rm>{,<rotation>}" }, |
| 12596 | { 0xffffffc0, 0x0000b2c0, ARMV6_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateUXTB, "uxtb<c> <Rd>,<Rm>" }, |
| 12597 | { 0xfffff080, 0xfa5ff080, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateUXTB, "uxtb<c>.w <Rd>,<Rm>{,<rotation>}" }, |
| 12598 | { 0xffffffc0, 0x0000b280, ARMV6_ABOVE, eEncodingT1, No_VFP, eSize16, &EmulateInstructionARM::EmulateUXTH, "uxth<c> <Rd>,<Rm>" }, |
| 12599 | { 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] | 12600 | }; |
| 12601 | |
| 12602 | const size_t k_num_thumb_opcodes = sizeof(g_thumb_opcodes)/sizeof(ARMOpcode); |
| 12603 | for (size_t i=0; i<k_num_thumb_opcodes; ++i) |
| 12604 | { |
| 12605 | if ((g_thumb_opcodes[i].mask & opcode) == g_thumb_opcodes[i].value) |
| 12606 | return &g_thumb_opcodes[i]; |
| 12607 | } |
| 12608 | return NULL; |
| 12609 | } |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12610 | |
Greg Clayton | 31e2a38 | 2011-01-30 20:03:56 +0000 | [diff] [blame] | 12611 | bool |
Greg Clayton | 395fc33 | 2011-02-15 21:59:32 +0000 | [diff] [blame] | 12612 | EmulateInstructionARM::SetArchitecture (const ArchSpec &arch) |
Greg Clayton | 31e2a38 | 2011-01-30 20:03:56 +0000 | [diff] [blame] | 12613 | { |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12614 | m_arch = arch; |
Greg Clayton | 31e2a38 | 2011-01-30 20:03:56 +0000 | [diff] [blame] | 12615 | m_arm_isa = 0; |
Greg Clayton | 940b103 | 2011-02-23 00:35:02 +0000 | [diff] [blame] | 12616 | const char *arch_cstr = arch.GetArchitectureName (); |
Greg Clayton | 395fc33 | 2011-02-15 21:59:32 +0000 | [diff] [blame] | 12617 | if (arch_cstr) |
Greg Clayton | 31e2a38 | 2011-01-30 20:03:56 +0000 | [diff] [blame] | 12618 | { |
Greg Clayton | 395fc33 | 2011-02-15 21:59:32 +0000 | [diff] [blame] | 12619 | if (0 == ::strcasecmp(arch_cstr, "armv4t")) m_arm_isa = ARMv4T; |
| 12620 | else if (0 == ::strcasecmp(arch_cstr, "armv4")) m_arm_isa = ARMv4; |
| 12621 | else if (0 == ::strcasecmp(arch_cstr, "armv5tej")) m_arm_isa = ARMv5TEJ; |
| 12622 | else if (0 == ::strcasecmp(arch_cstr, "armv5te")) m_arm_isa = ARMv5TE; |
| 12623 | else if (0 == ::strcasecmp(arch_cstr, "armv5t")) m_arm_isa = ARMv5T; |
| 12624 | else if (0 == ::strcasecmp(arch_cstr, "armv6k")) m_arm_isa = ARMv6K; |
| 12625 | else if (0 == ::strcasecmp(arch_cstr, "armv6")) m_arm_isa = ARMv6; |
| 12626 | else if (0 == ::strcasecmp(arch_cstr, "armv6t2")) m_arm_isa = ARMv6T2; |
| 12627 | else if (0 == ::strcasecmp(arch_cstr, "armv7")) m_arm_isa = ARMv7; |
| 12628 | else if (0 == ::strcasecmp(arch_cstr, "armv8")) m_arm_isa = ARMv8; |
Greg Clayton | 31e2a38 | 2011-01-30 20:03:56 +0000 | [diff] [blame] | 12629 | } |
| 12630 | return m_arm_isa != 0; |
| 12631 | } |
| 12632 | |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12633 | bool |
| 12634 | EmulateInstructionARM::SetInstruction (const Opcode &insn_opcode, const Address &inst_addr) |
| 12635 | { |
| 12636 | m_opcode = insn_opcode; |
| 12637 | |
| 12638 | if (m_arch.GetTriple().getArch() == llvm::Triple::thumb) |
| 12639 | m_opcode_mode = eModeThumb; |
| 12640 | else |
| 12641 | { |
| 12642 | AddressClass addr_class = inst_addr.GetAddressClass(); |
| 12643 | |
| 12644 | if ((addr_class == eAddressClassCode) || (addr_class == eAddressClassUnknown)) |
| 12645 | m_opcode_mode = eModeARM; |
| 12646 | else if (addr_class == eAddressClassCodeAlternateISA) |
| 12647 | m_opcode_mode = eModeThumb; |
| 12648 | else |
| 12649 | return false; |
| 12650 | } |
| 12651 | return true; |
| 12652 | } |
Greg Clayton | 31e2a38 | 2011-01-30 20:03:56 +0000 | [diff] [blame] | 12653 | |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12654 | bool |
| 12655 | EmulateInstructionARM::ReadInstruction () |
| 12656 | { |
| 12657 | bool success = false; |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12658 | m_opcode_cpsr = ReadRegisterUnsigned (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FLAGS, 0, &success); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12659 | if (success) |
| 12660 | { |
| 12661 | addr_t pc = ReadRegisterUnsigned (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC, LLDB_INVALID_ADDRESS, &success); |
| 12662 | if (success) |
| 12663 | { |
Caroline Tice | 9bfe7f2 | 2011-02-14 23:03:21 +0000 | [diff] [blame] | 12664 | Context read_inst_context; |
| 12665 | read_inst_context.type = eContextReadOpcode; |
| 12666 | read_inst_context.SetNoArgs (); |
| 12667 | |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12668 | if (m_opcode_cpsr & MASK_CPSR_T) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12669 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12670 | m_opcode_mode = eModeThumb; |
Caroline Tice | cc96eb5 | 2011-02-17 19:20:40 +0000 | [diff] [blame] | 12671 | uint32_t thumb_opcode = MemARead(read_inst_context, pc, 2, 0, &success); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12672 | |
| 12673 | if (success) |
| 12674 | { |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12675 | if ((thumb_opcode & 0xe000) != 0xe000 || ((thumb_opcode & 0x1800u) == 0)) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12676 | { |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12677 | m_opcode.SetOpcode16 (thumb_opcode); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12678 | } |
| 12679 | else |
| 12680 | { |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12681 | 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] | 12682 | } |
| 12683 | } |
| 12684 | } |
| 12685 | else |
| 12686 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12687 | m_opcode_mode = eModeARM; |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12688 | m_opcode.SetOpcode32 (MemARead(read_inst_context, pc, 4, 0, &success)); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12689 | } |
| 12690 | } |
| 12691 | } |
| 12692 | if (!success) |
| 12693 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12694 | m_opcode_mode = eModeInvalid; |
| 12695 | m_opcode_pc = LLDB_INVALID_ADDRESS; |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12696 | } |
| 12697 | return success; |
| 12698 | } |
| 12699 | |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 12700 | uint32_t |
| 12701 | EmulateInstructionARM::ArchVersion () |
| 12702 | { |
| 12703 | return m_arm_isa; |
| 12704 | } |
| 12705 | |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12706 | bool |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12707 | EmulateInstructionARM::ConditionPassed (const uint32_t opcode) |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12708 | { |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12709 | |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12710 | const uint32_t cond = CurrentCond (opcode); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12711 | |
| 12712 | if (cond == UINT32_MAX) |
| 12713 | return false; |
| 12714 | |
| 12715 | bool result = false; |
| 12716 | switch (UnsignedBits(cond, 3, 1)) |
| 12717 | { |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12718 | case 0: |
| 12719 | if (m_opcode_cpsr == 0) |
| 12720 | return true; |
| 12721 | result = (m_opcode_cpsr & MASK_CPSR_Z) != 0; |
| 12722 | break; |
| 12723 | case 1: |
| 12724 | if (m_opcode_cpsr == 0) |
| 12725 | return true; |
| 12726 | result = (m_opcode_cpsr & MASK_CPSR_C) != 0; |
| 12727 | break; |
| 12728 | case 2: |
| 12729 | if (m_opcode_cpsr == 0) |
| 12730 | return true; |
| 12731 | result = (m_opcode_cpsr & MASK_CPSR_N) != 0; |
| 12732 | break; |
| 12733 | case 3: |
| 12734 | if (m_opcode_cpsr == 0) |
| 12735 | return true; |
| 12736 | result = (m_opcode_cpsr & MASK_CPSR_V) != 0; |
| 12737 | break; |
| 12738 | case 4: |
| 12739 | if (m_opcode_cpsr == 0) |
| 12740 | return true; |
| 12741 | result = ((m_opcode_cpsr & MASK_CPSR_C) != 0) && ((m_opcode_cpsr & MASK_CPSR_Z) == 0); |
| 12742 | break; |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12743 | case 5: |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12744 | if (m_opcode_cpsr == 0) |
| 12745 | return true; |
| 12746 | else |
| 12747 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12748 | bool n = (m_opcode_cpsr & MASK_CPSR_N); |
| 12749 | bool v = (m_opcode_cpsr & MASK_CPSR_V); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12750 | result = n == v; |
| 12751 | } |
| 12752 | break; |
| 12753 | case 6: |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 12754 | if (m_opcode_cpsr == 0) |
| 12755 | return true; |
| 12756 | else |
| 12757 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12758 | bool n = (m_opcode_cpsr & MASK_CPSR_N); |
| 12759 | bool v = (m_opcode_cpsr & MASK_CPSR_V); |
| 12760 | result = n == v && ((m_opcode_cpsr & MASK_CPSR_Z) == 0); |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12761 | } |
| 12762 | break; |
| 12763 | case 7: |
| 12764 | result = true; |
| 12765 | break; |
| 12766 | } |
| 12767 | |
| 12768 | if (cond & 1) |
| 12769 | result = !result; |
| 12770 | return result; |
| 12771 | } |
| 12772 | |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12773 | uint32_t |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12774 | EmulateInstructionARM::CurrentCond (const uint32_t opcode) |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12775 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12776 | switch (m_opcode_mode) |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12777 | { |
| 12778 | default: |
| 12779 | case eModeInvalid: |
| 12780 | break; |
| 12781 | |
| 12782 | case eModeARM: |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12783 | return UnsignedBits(opcode, 31, 28); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12784 | |
| 12785 | case eModeThumb: |
| 12786 | // For T1 and T3 encodings of the Branch instruction, it returns the 4-bit |
| 12787 | // 'cond' field of the encoding. |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12788 | { |
Greg Clayton | 7bc3908 | 2011-03-24 23:53:38 +0000 | [diff] [blame] | 12789 | const uint32_t byte_size = m_opcode.GetByteSize(); |
| 12790 | if (byte_size == 2) |
| 12791 | { |
| 12792 | if (Bits32(opcode, 15, 12) == 0x0d && Bits32(opcode, 11, 7) != 0x0f) |
| 12793 | return Bits32(opcode, 11, 7); |
| 12794 | } |
| 12795 | else |
| 12796 | { |
| 12797 | assert (byte_size == 4); |
| 12798 | if (Bits32(opcode, 31, 27) == 0x1e && |
| 12799 | Bits32(opcode, 15, 14) == 0x02 && |
| 12800 | Bits32(opcode, 12, 12) == 0x00 && |
| 12801 | Bits32(opcode, 25, 22) <= 0x0d) |
| 12802 | { |
| 12803 | return Bits32(opcode, 25, 22); |
| 12804 | } |
| 12805 | } |
| 12806 | |
| 12807 | return m_it_session.GetCond(); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12808 | } |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12809 | } |
| 12810 | return UINT32_MAX; // Return invalid value |
| 12811 | } |
| 12812 | |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12813 | bool |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 12814 | EmulateInstructionARM::InITBlock() |
| 12815 | { |
| 12816 | return CurrentInstrSet() == eModeThumb && m_it_session.InITBlock(); |
| 12817 | } |
| 12818 | |
| 12819 | bool |
| 12820 | EmulateInstructionARM::LastInITBlock() |
| 12821 | { |
| 12822 | return CurrentInstrSet() == eModeThumb && m_it_session.LastInITBlock(); |
| 12823 | } |
| 12824 | |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 12825 | bool |
| 12826 | EmulateInstructionARM::BadMode (uint32_t mode) |
| 12827 | { |
| 12828 | |
| 12829 | switch (mode) |
| 12830 | { |
| 12831 | case 16: return false; // '10000' |
| 12832 | case 17: return false; // '10001' |
| 12833 | case 18: return false; // '10010' |
| 12834 | case 19: return false; // '10011' |
| 12835 | case 22: return false; // '10110' |
| 12836 | case 23: return false; // '10111' |
| 12837 | case 27: return false; // '11011' |
| 12838 | case 31: return false; // '11111' |
| 12839 | default: return true; |
| 12840 | } |
| 12841 | return true; |
| 12842 | } |
| 12843 | |
| 12844 | bool |
| 12845 | EmulateInstructionARM::CurrentModeIsPrivileged () |
| 12846 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12847 | uint32_t mode = Bits32 (m_opcode_cpsr, 4, 0); |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 12848 | |
| 12849 | if (BadMode (mode)) |
| 12850 | return false; |
| 12851 | |
| 12852 | if (mode == 16) |
| 12853 | return false; |
| 12854 | |
| 12855 | return true; |
| 12856 | } |
| 12857 | |
| 12858 | void |
| 12859 | EmulateInstructionARM::CPSRWriteByInstr (uint32_t value, uint32_t bytemask, bool affect_execstate) |
| 12860 | { |
| 12861 | bool privileged = CurrentModeIsPrivileged(); |
| 12862 | |
| 12863 | uint32_t tmp_cpsr = 0; |
| 12864 | |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12865 | tmp_cpsr = tmp_cpsr | (Bits32 (m_opcode_cpsr, 23, 20) << 20); |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 12866 | |
| 12867 | if (BitIsSet (bytemask, 3)) |
| 12868 | { |
| 12869 | tmp_cpsr = tmp_cpsr | (Bits32 (value, 31, 27) << 27); |
| 12870 | if (affect_execstate) |
| 12871 | tmp_cpsr = tmp_cpsr | (Bits32 (value, 26, 24) << 24); |
| 12872 | } |
| 12873 | |
| 12874 | if (BitIsSet (bytemask, 2)) |
| 12875 | { |
| 12876 | tmp_cpsr = tmp_cpsr | (Bits32 (value, 19, 16) << 16); |
| 12877 | } |
| 12878 | |
| 12879 | if (BitIsSet (bytemask, 1)) |
| 12880 | { |
| 12881 | if (affect_execstate) |
| 12882 | tmp_cpsr = tmp_cpsr | (Bits32 (value, 15, 10) << 10); |
| 12883 | tmp_cpsr = tmp_cpsr | (Bit32 (value, 9) << 9); |
| 12884 | if (privileged) |
| 12885 | tmp_cpsr = tmp_cpsr | (Bit32 (value, 8) << 8); |
| 12886 | } |
| 12887 | |
| 12888 | if (BitIsSet (bytemask, 0)) |
| 12889 | { |
| 12890 | if (privileged) |
| 12891 | tmp_cpsr = tmp_cpsr | (Bits32 (value, 7, 6) << 6); |
| 12892 | if (affect_execstate) |
| 12893 | tmp_cpsr = tmp_cpsr | (Bit32 (value, 5) << 5); |
| 12894 | if (privileged) |
| 12895 | tmp_cpsr = tmp_cpsr | Bits32 (value, 4, 0); |
| 12896 | } |
| 12897 | |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12898 | m_opcode_cpsr = tmp_cpsr; |
Caroline Tice | b27771d | 2011-03-03 22:37:46 +0000 | [diff] [blame] | 12899 | } |
| 12900 | |
| 12901 | |
Johnny Chen | 098ae2d | 2011-02-12 00:50:05 +0000 | [diff] [blame] | 12902 | bool |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12903 | EmulateInstructionARM::BranchWritePC (const Context &context, uint32_t addr) |
| 12904 | { |
| 12905 | addr_t target; |
| 12906 | |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 12907 | // Check the current instruction set. |
| 12908 | if (CurrentInstrSet() == eModeARM) |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12909 | target = addr & 0xfffffffc; |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 12910 | else |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12911 | target = addr & 0xfffffffe; |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 12912 | |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12913 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC, target)) |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 12914 | return false; |
| 12915 | |
| 12916 | return true; |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12917 | } |
| 12918 | |
| 12919 | // As a side effect, BXWritePC sets context.arg2 to eModeARM or eModeThumb by inspecting addr. |
| 12920 | bool |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 12921 | EmulateInstructionARM::BXWritePC (Context &context, uint32_t addr) |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12922 | { |
| 12923 | addr_t target; |
Johnny Chen | 0f309db | 2011-02-09 19:11:32 +0000 | [diff] [blame] | 12924 | // If the CPSR is changed due to switching between ARM and Thumb ISETSTATE, |
| 12925 | // we want to record it and issue a WriteRegister callback so the clients |
| 12926 | // can track the mode changes accordingly. |
| 12927 | bool cpsr_changed = false; |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12928 | |
| 12929 | if (BitIsSet(addr, 0)) |
| 12930 | { |
Johnny Chen | 0f309db | 2011-02-09 19:11:32 +0000 | [diff] [blame] | 12931 | if (CurrentInstrSet() != eModeThumb) |
| 12932 | { |
| 12933 | SelectInstrSet(eModeThumb); |
| 12934 | cpsr_changed = true; |
| 12935 | } |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12936 | target = addr & 0xfffffffe; |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 12937 | context.SetMode (eModeThumb); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12938 | } |
| 12939 | else if (BitIsClear(addr, 1)) |
| 12940 | { |
Johnny Chen | 0f309db | 2011-02-09 19:11:32 +0000 | [diff] [blame] | 12941 | if (CurrentInstrSet() != eModeARM) |
| 12942 | { |
| 12943 | SelectInstrSet(eModeARM); |
| 12944 | cpsr_changed = true; |
| 12945 | } |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12946 | target = addr & 0xfffffffc; |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 12947 | context.SetMode (eModeARM); |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12948 | } |
| 12949 | else |
| 12950 | return false; // address<1:0> == '10' => UNPREDICTABLE |
| 12951 | |
Johnny Chen | 0f309db | 2011-02-09 19:11:32 +0000 | [diff] [blame] | 12952 | if (cpsr_changed) |
| 12953 | { |
Johnny Chen | 558133b | 2011-02-09 23:59:17 +0000 | [diff] [blame] | 12954 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FLAGS, m_new_inst_cpsr)) |
Johnny Chen | 0f309db | 2011-02-09 19:11:32 +0000 | [diff] [blame] | 12955 | return false; |
| 12956 | } |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12957 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC, target)) |
Johnny Chen | 53ebab7 | 2011-02-08 23:21:57 +0000 | [diff] [blame] | 12958 | return false; |
| 12959 | |
| 12960 | return true; |
Johnny Chen | 9ee056b | 2011-02-08 00:06:35 +0000 | [diff] [blame] | 12961 | } |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 12962 | |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 12963 | // Dispatches to either BXWritePC or BranchWritePC based on architecture versions. |
| 12964 | bool |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 12965 | EmulateInstructionARM::LoadWritePC (Context &context, uint32_t addr) |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 12966 | { |
| 12967 | if (ArchVersion() >= ARMv5T) |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 12968 | return BXWritePC(context, addr); |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 12969 | else |
| 12970 | return BranchWritePC((const Context)context, addr); |
| 12971 | } |
| 12972 | |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 12973 | // Dispatches to either BXWritePC or BranchWritePC based on architecture versions and current instruction set. |
| 12974 | bool |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 12975 | EmulateInstructionARM::ALUWritePC (Context &context, uint32_t addr) |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 12976 | { |
| 12977 | if (ArchVersion() >= ARMv7 && CurrentInstrSet() == eModeARM) |
Johnny Chen | 668b451 | 2011-02-15 21:08:58 +0000 | [diff] [blame] | 12978 | return BXWritePC(context, addr); |
Johnny Chen | 26863dc | 2011-02-09 23:43:29 +0000 | [diff] [blame] | 12979 | else |
| 12980 | return BranchWritePC((const Context)context, addr); |
| 12981 | } |
| 12982 | |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 12983 | EmulateInstructionARM::Mode |
| 12984 | EmulateInstructionARM::CurrentInstrSet () |
| 12985 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12986 | return m_opcode_mode; |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 12987 | } |
| 12988 | |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12989 | // 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] | 12990 | // ReadInstruction() is performed. This function has a side effect of updating |
| 12991 | // the m_new_inst_cpsr member variable if necessary. |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 12992 | bool |
| 12993 | EmulateInstructionARM::SelectInstrSet (Mode arm_or_thumb) |
| 12994 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 12995 | m_new_inst_cpsr = m_opcode_cpsr; |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 12996 | switch (arm_or_thumb) |
| 12997 | { |
| 12998 | default: |
| 12999 | return false; |
| 13000 | eModeARM: |
| 13001 | // Clear the T bit. |
Johnny Chen | 558133b | 2011-02-09 23:59:17 +0000 | [diff] [blame] | 13002 | m_new_inst_cpsr &= ~MASK_CPSR_T; |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 13003 | break; |
| 13004 | eModeThumb: |
| 13005 | // Set the T bit. |
Johnny Chen | 558133b | 2011-02-09 23:59:17 +0000 | [diff] [blame] | 13006 | m_new_inst_cpsr |= MASK_CPSR_T; |
Johnny Chen | ee9b1f7 | 2011-02-09 01:00:31 +0000 | [diff] [blame] | 13007 | break; |
| 13008 | } |
| 13009 | return true; |
| 13010 | } |
| 13011 | |
Johnny Chen | ef21b59 | 2011-02-10 01:52:38 +0000 | [diff] [blame] | 13012 | // This function returns TRUE if the processor currently provides support for |
| 13013 | // unaligned memory accesses, or FALSE otherwise. This is always TRUE in ARMv7, |
| 13014 | // controllable by the SCTLR.U bit in ARMv6, and always FALSE before ARMv6. |
| 13015 | bool |
| 13016 | EmulateInstructionARM::UnalignedSupport() |
| 13017 | { |
| 13018 | return (ArchVersion() >= ARMv7); |
| 13019 | } |
| 13020 | |
Johnny Chen | bf6ad17 | 2011-02-11 01:29:53 +0000 | [diff] [blame] | 13021 | // The main addition and subtraction instructions can produce status information |
| 13022 | // about both unsigned carry and signed overflow conditions. This status |
| 13023 | // information can be used to synthesize multi-word additions and subtractions. |
| 13024 | EmulateInstructionARM::AddWithCarryResult |
| 13025 | EmulateInstructionARM::AddWithCarry (uint32_t x, uint32_t y, uint8_t carry_in) |
| 13026 | { |
| 13027 | uint32_t result; |
| 13028 | uint8_t carry_out; |
| 13029 | uint8_t overflow; |
| 13030 | |
| 13031 | uint64_t unsigned_sum = x + y + carry_in; |
| 13032 | int64_t signed_sum = (int32_t)x + (int32_t)y + (int32_t)carry_in; |
| 13033 | |
| 13034 | result = UnsignedBits(unsigned_sum, 31, 0); |
Caroline Tice | 0fe5a53 | 2011-04-08 23:33:06 +0000 | [diff] [blame] | 13035 | // carry_out = (result == unsigned_sum ? 0 : 1); |
Johnny Chen | bf6ad17 | 2011-02-11 01:29:53 +0000 | [diff] [blame] | 13036 | overflow = ((int32_t)result == signed_sum ? 0 : 1); |
Caroline Tice | 0fe5a53 | 2011-04-08 23:33:06 +0000 | [diff] [blame] | 13037 | |
| 13038 | if (carry_in) |
Caroline Tice | 523c554 | 2011-04-13 00:42:12 +0000 | [diff] [blame] | 13039 | carry_out = ((int32_t) x >= (int32_t) (~y)) ? 1 : 0; |
Caroline Tice | 0fe5a53 | 2011-04-08 23:33:06 +0000 | [diff] [blame] | 13040 | else |
| 13041 | carry_out = ((int32_t) x > (int32_t) y) ? 1 : 0; |
Johnny Chen | bf6ad17 | 2011-02-11 01:29:53 +0000 | [diff] [blame] | 13042 | |
| 13043 | AddWithCarryResult res = { result, carry_out, overflow }; |
| 13044 | return res; |
| 13045 | } |
| 13046 | |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 13047 | uint32_t |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 13048 | EmulateInstructionARM::ReadCoreReg(uint32_t num, bool *success) |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 13049 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 13050 | uint32_t reg_kind, reg_num; |
| 13051 | switch (num) |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 13052 | { |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 13053 | case SP_REG: |
| 13054 | reg_kind = eRegisterKindGeneric; |
| 13055 | reg_num = LLDB_REGNUM_GENERIC_SP; |
| 13056 | break; |
| 13057 | case LR_REG: |
| 13058 | reg_kind = eRegisterKindGeneric; |
| 13059 | reg_num = LLDB_REGNUM_GENERIC_RA; |
| 13060 | break; |
| 13061 | case PC_REG: |
| 13062 | reg_kind = eRegisterKindGeneric; |
| 13063 | reg_num = LLDB_REGNUM_GENERIC_PC; |
| 13064 | break; |
| 13065 | default: |
Greg Clayton | 4fdf760 | 2011-03-20 04:57:14 +0000 | [diff] [blame] | 13066 | if (num < SP_REG) |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 13067 | { |
| 13068 | reg_kind = eRegisterKindDWARF; |
| 13069 | reg_num = dwarf_r0 + num; |
| 13070 | } |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 13071 | else |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 13072 | { |
| 13073 | assert(0 && "Invalid register number"); |
| 13074 | *success = false; |
Greg Clayton | 4fdf760 | 2011-03-20 04:57:14 +0000 | [diff] [blame] | 13075 | return UINT32_MAX; |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 13076 | } |
| 13077 | break; |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 13078 | } |
Johnny Chen | e39f22d | 2011-02-19 01:36:13 +0000 | [diff] [blame] | 13079 | |
| 13080 | // Read our register. |
| 13081 | uint32_t val = ReadRegisterUnsigned (reg_kind, reg_num, 0, success); |
| 13082 | |
| 13083 | // When executing an ARM instruction , PC reads as the address of the current |
| 13084 | // instruction plus 8. |
| 13085 | // When executing a Thumb instruction , PC reads as the address of the current |
| 13086 | // instruction plus 4. |
| 13087 | if (num == 15) |
| 13088 | { |
| 13089 | if (CurrentInstrSet() == eModeARM) |
| 13090 | val += 8; |
| 13091 | else |
| 13092 | val += 4; |
| 13093 | } |
Johnny Chen | 157b959 | 2011-02-18 21:13:05 +0000 | [diff] [blame] | 13094 | |
| 13095 | return val; |
| 13096 | } |
| 13097 | |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 13098 | // Write the result to the ARM core register Rd, and optionally update the |
| 13099 | // condition flags based on the result. |
| 13100 | // |
| 13101 | // This helper method tries to encapsulate the following pseudocode from the |
| 13102 | // ARM Architecture Reference Manual: |
| 13103 | // |
| 13104 | // if d == 15 then // Can only occur for encoding A1 |
| 13105 | // ALUWritePC(result); // setflags is always FALSE here |
| 13106 | // else |
| 13107 | // R[d] = result; |
| 13108 | // if setflags then |
| 13109 | // APSR.N = result<31>; |
| 13110 | // APSR.Z = IsZeroBit(result); |
| 13111 | // APSR.C = carry; |
| 13112 | // // APSR.V unchanged |
| 13113 | // |
| 13114 | // In the above case, the API client does not pass in the overflow arg, which |
| 13115 | // defaults to ~0u. |
| 13116 | bool |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 13117 | EmulateInstructionARM::WriteCoreRegOptionalFlags (Context &context, |
| 13118 | const uint32_t result, |
| 13119 | const uint32_t Rd, |
| 13120 | bool setflags, |
| 13121 | const uint32_t carry, |
| 13122 | const uint32_t overflow) |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 13123 | { |
| 13124 | if (Rd == 15) |
| 13125 | { |
| 13126 | if (!ALUWritePC (context, result)) |
| 13127 | return false; |
| 13128 | } |
| 13129 | else |
| 13130 | { |
Johnny Chen | a695f95 | 2011-02-23 21:24:25 +0000 | [diff] [blame] | 13131 | uint32_t reg_kind, reg_num; |
| 13132 | switch (Rd) |
| 13133 | { |
| 13134 | case SP_REG: |
| 13135 | reg_kind = eRegisterKindGeneric; |
| 13136 | reg_num = LLDB_REGNUM_GENERIC_SP; |
| 13137 | break; |
| 13138 | case LR_REG: |
| 13139 | reg_kind = eRegisterKindGeneric; |
| 13140 | reg_num = LLDB_REGNUM_GENERIC_RA; |
| 13141 | break; |
| 13142 | default: |
| 13143 | reg_kind = eRegisterKindDWARF; |
| 13144 | reg_num = dwarf_r0 + Rd; |
| 13145 | } |
| 13146 | if (!WriteRegisterUnsigned (context, reg_kind, reg_num, result)) |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 13147 | return false; |
| 13148 | if (setflags) |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 13149 | return WriteFlags (context, result, carry, overflow); |
| 13150 | } |
| 13151 | return true; |
| 13152 | } |
| 13153 | |
| 13154 | // This helper method tries to encapsulate the following pseudocode from the |
| 13155 | // ARM Architecture Reference Manual: |
| 13156 | // |
| 13157 | // APSR.N = result<31>; |
| 13158 | // APSR.Z = IsZeroBit(result); |
| 13159 | // APSR.C = carry; |
| 13160 | // APSR.V = overflow |
| 13161 | // |
| 13162 | // Default arguments can be specified for carry and overflow parameters, which means |
| 13163 | // not to update the respective flags. |
| 13164 | bool |
| 13165 | EmulateInstructionARM::WriteFlags (Context &context, |
| 13166 | const uint32_t result, |
| 13167 | const uint32_t carry, |
| 13168 | const uint32_t overflow) |
| 13169 | { |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 13170 | m_new_inst_cpsr = m_opcode_cpsr; |
Johnny Chen | 2434884 | 2011-02-23 00:15:56 +0000 | [diff] [blame] | 13171 | SetBit32(m_new_inst_cpsr, CPSR_N_POS, Bit32(result, CPSR_N_POS)); |
| 13172 | SetBit32(m_new_inst_cpsr, CPSR_Z_POS, result == 0 ? 1 : 0); |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 13173 | if (carry != ~0u) |
Johnny Chen | 2434884 | 2011-02-23 00:15:56 +0000 | [diff] [blame] | 13174 | SetBit32(m_new_inst_cpsr, CPSR_C_POS, carry); |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 13175 | if (overflow != ~0u) |
Johnny Chen | 2434884 | 2011-02-23 00:15:56 +0000 | [diff] [blame] | 13176 | SetBit32(m_new_inst_cpsr, CPSR_V_POS, overflow); |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 13177 | if (m_new_inst_cpsr != m_opcode_cpsr) |
Johnny Chen | 10530c2 | 2011-02-17 22:37:12 +0000 | [diff] [blame] | 13178 | { |
| 13179 | if (!WriteRegisterUnsigned (context, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FLAGS, m_new_inst_cpsr)) |
| 13180 | return false; |
Johnny Chen | ca67d1c | 2011-02-17 01:35:27 +0000 | [diff] [blame] | 13181 | } |
| 13182 | return true; |
| 13183 | } |
| 13184 | |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 13185 | bool |
| 13186 | EmulateInstructionARM::EvaluateInstruction () |
| 13187 | { |
Johnny Chen | c315f86 | 2011-02-05 00:46:10 +0000 | [diff] [blame] | 13188 | // Advance the ITSTATE bits to their values for the next instruction. |
Greg Clayton | b344843 | 2011-03-24 21:19:54 +0000 | [diff] [blame] | 13189 | if (m_opcode_mode == eModeThumb && m_it_session.InITBlock()) |
Johnny Chen | c315f86 | 2011-02-05 00:46:10 +0000 | [diff] [blame] | 13190 | m_it_session.ITAdvance(); |
| 13191 | |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 13192 | |
| 13193 | ARMOpcode *opcode_data; |
| 13194 | |
| 13195 | if (m_opcode_mode == eModeThumb) |
Caroline Tice | 523c554 | 2011-04-13 00:42:12 +0000 | [diff] [blame] | 13196 | { |
| 13197 | if (m_opcode.GetType() == Opcode::eType32) |
| 13198 | { |
| 13199 | uint16_t upper_bits = Bits32 (m_opcode.GetOpcode32(), 31, 16); |
| 13200 | uint16_t lower_bits = Bits32 (m_opcode.GetOpcode32(), 15, 0); |
| 13201 | uint32_t swapped = (lower_bits << 16) | upper_bits; |
| 13202 | m_opcode.SetOpcode32 (swapped); |
| 13203 | } |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 13204 | opcode_data = GetThumbOpcodeForInstruction (m_opcode.GetOpcode32()); |
Caroline Tice | 523c554 | 2011-04-13 00:42:12 +0000 | [diff] [blame] | 13205 | } |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 13206 | else if (m_opcode_mode == eModeARM) |
| 13207 | opcode_data = GetARMOpcodeForInstruction (m_opcode.GetOpcode32()); |
| 13208 | else |
| 13209 | return false; |
| 13210 | |
| 13211 | if (!opcode_data) |
| 13212 | return false; |
| 13213 | // Verify that we're the right arch for this opcode |
| 13214 | |
| 13215 | switch (m_arm_isa) |
| 13216 | { |
| 13217 | case ARMv4: |
| 13218 | if (opcode_data->variants != ARMvAll) |
| 13219 | return false; |
| 13220 | break; |
| 13221 | |
| 13222 | case ARMv4T: |
| 13223 | if ((opcode_data->variants!= ARMvAll) |
| 13224 | && (opcode_data->variants != ARMV4T_ABOVE)) |
| 13225 | return false; |
| 13226 | break; |
| 13227 | |
| 13228 | case ARMv5T: |
| 13229 | case ARMv5TE: |
| 13230 | if ((opcode_data->variants != ARMvAll) |
| 13231 | && (opcode_data->variants != ARMV4T_ABOVE) |
| 13232 | && (opcode_data->variants != ARMV5_ABOVE)) |
| 13233 | return false; |
| 13234 | break; |
| 13235 | |
| 13236 | case ARMv5TEJ: |
| 13237 | if ((opcode_data->variants != ARMvAll) |
| 13238 | && (opcode_data->variants != ARMV4T_ABOVE) |
| 13239 | && (opcode_data->variants != ARMV5_ABOVE) |
| 13240 | && (opcode_data->variants != ARMV5J_ABOVE)) |
| 13241 | return false; |
| 13242 | break; |
| 13243 | |
| 13244 | case ARMv6: |
| 13245 | case ARMv6K: |
| 13246 | if ((opcode_data->variants != ARMvAll) |
| 13247 | && (opcode_data->variants != ARMV4T_ABOVE) |
| 13248 | && (opcode_data->variants != ARMV5_ABOVE) |
| 13249 | && (opcode_data->variants != ARMV5J_ABOVE) |
| 13250 | && (opcode_data->variants != ARMV6_ABOVE)) |
| 13251 | return false; |
| 13252 | break; |
| 13253 | |
| 13254 | case ARMv6T2: |
| 13255 | case ARMv7: |
| 13256 | case ARMv8: |
| 13257 | if ((opcode_data->variants != ARMvAll) |
| 13258 | && (opcode_data->variants != ARMV4T_ABOVE) |
| 13259 | && (opcode_data->variants != ARMV5_ABOVE) |
| 13260 | && (opcode_data->variants != ARMV5J_ABOVE) |
| 13261 | && (opcode_data->variants != ARMV6_ABOVE) |
| 13262 | && (opcode_data->variants != ARMV6T2_ABOVE)) |
| 13263 | return false; |
| 13264 | break; |
| 13265 | |
| 13266 | default: |
| 13267 | // if (opcode_data->variants != ARMvAll) |
| 13268 | // return false; |
| 13269 | break; |
| 13270 | } |
| 13271 | |
| 13272 | // Just for now, for testing purposes. |
Caroline Tice | af59180 | 2011-04-05 23:22:54 +0000 | [diff] [blame] | 13273 | if (m_baton == NULL) |
Caroline Tice | 0fe5a53 | 2011-04-08 23:33:06 +0000 | [diff] [blame] | 13274 | fprintf (stdout, "\nEvaluateInstruction, opcode (0x%x), found = '%s'\n", m_opcode.GetOpcode32(), |
| 13275 | opcode_data->name); |
| 13276 | |
| 13277 | bool success; |
| 13278 | if (m_baton) |
| 13279 | { |
| 13280 | uint32_t cpsr_value = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_cpsr, 0, &success); |
| 13281 | if (success) |
| 13282 | m_opcode_cpsr = cpsr_value; |
| 13283 | } |
Caroline Tice | 080bf61 | 2011-04-05 18:46:00 +0000 | [diff] [blame] | 13284 | |
Caroline Tice | 0fe5a53 | 2011-04-08 23:33:06 +0000 | [diff] [blame] | 13285 | uint32_t orig_pc_value = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_pc, 0, &success); |
| 13286 | if (!success) |
| 13287 | return false; |
| 13288 | |
| 13289 | success = (this->*opcode_data->callback) (m_opcode.GetOpcode32(), opcode_data->encoding); // Call the Emulate... function. |
| 13290 | if (!success) |
| 13291 | return false; |
| 13292 | |
| 13293 | uint32_t after_pc_value = ReadRegisterUnsigned (eRegisterKindDWARF, dwarf_pc, 0, &success); |
| 13294 | if (!success) |
| 13295 | return false; |
| 13296 | |
| 13297 | if (m_advance_pc && (after_pc_value == orig_pc_value)) |
| 13298 | { |
| 13299 | if (opcode_data->size == eSize32) |
| 13300 | after_pc_value += 4; |
| 13301 | else if (opcode_data->size == eSize16) |
| 13302 | after_pc_value += 2; |
| 13303 | |
| 13304 | EmulateInstruction::Context context; |
| 13305 | context.type = eContextAdvancePC; |
| 13306 | context.SetNoArgs(); |
| 13307 | if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_pc, after_pc_value)) |
| 13308 | return false; |
| 13309 | |
| 13310 | } |
| 13311 | |
| 13312 | return true; |
Greg Clayton | 64c8443 | 2011-01-21 22:02:52 +0000 | [diff] [blame] | 13313 | } |