Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 4 | |
| 5 | #ifndef V8_MIPS_CONSTANTS_H_ |
| 6 | #define V8_MIPS_CONSTANTS_H_ |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 7 | #include "src/globals.h" |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 8 | // UNIMPLEMENTED_ macro for MIPS. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 9 | #ifdef DEBUG |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 10 | #define UNIMPLEMENTED_MIPS() \ |
| 11 | v8::internal::PrintF("%s, \tline %d: \tfunction %s not implemented. \n", \ |
| 12 | __FILE__, __LINE__, __func__) |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 13 | #else |
| 14 | #define UNIMPLEMENTED_MIPS() |
| 15 | #endif |
| 16 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 17 | #define UNSUPPORTED_MIPS() v8::internal::PrintF("Unsupported instruction.\n") |
| 18 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 19 | enum ArchVariants { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 20 | kMips32r1 = v8::internal::MIPSr1, |
| 21 | kMips32r2 = v8::internal::MIPSr2, |
| 22 | kMips32r6 = v8::internal::MIPSr6, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 23 | kLoongson |
| 24 | }; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 25 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 26 | #ifdef _MIPS_ARCH_MIPS32R2 |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 27 | static const ArchVariants kArchVariant = kMips32r2; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 28 | #elif _MIPS_ARCH_MIPS32R6 |
| 29 | static const ArchVariants kArchVariant = kMips32r6; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 30 | #elif _MIPS_ARCH_LOONGSON |
| 31 | // The loongson flag refers to the LOONGSON architectures based on MIPS-III, |
| 32 | // which predates (and is a subset of) the mips32r2 and r1 architectures. |
| 33 | static const ArchVariants kArchVariant = kLoongson; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 34 | #elif _MIPS_ARCH_MIPS32RX |
| 35 | // This flags referred to compatibility mode that creates universal code that |
| 36 | // can run on any MIPS32 architecture revision. The dynamically generated code |
| 37 | // by v8 is specialized for the MIPS host detected in runtime probing. |
| 38 | static const ArchVariants kArchVariant = kMips32r1; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 39 | #else |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 40 | static const ArchVariants kArchVariant = kMips32r1; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 41 | #endif |
| 42 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 43 | enum Endianness { |
| 44 | kLittle, |
| 45 | kBig |
| 46 | }; |
| 47 | |
| 48 | #if defined(V8_TARGET_LITTLE_ENDIAN) |
| 49 | static const Endianness kArchEndian = kLittle; |
| 50 | #elif defined(V8_TARGET_BIG_ENDIAN) |
| 51 | static const Endianness kArchEndian = kBig; |
| 52 | #else |
| 53 | #error Unknown endianness |
| 54 | #endif |
| 55 | |
| 56 | enum FpuMode { |
| 57 | kFP32, |
| 58 | kFP64, |
| 59 | kFPXX |
| 60 | }; |
| 61 | |
| 62 | #if defined(FPU_MODE_FP32) |
| 63 | static const FpuMode kFpuMode = kFP32; |
| 64 | #elif defined(FPU_MODE_FP64) |
| 65 | static const FpuMode kFpuMode = kFP64; |
| 66 | #elif defined(FPU_MODE_FPXX) |
| 67 | static const FpuMode kFpuMode = kFPXX; |
| 68 | #else |
| 69 | static const FpuMode kFpuMode = kFP32; |
| 70 | #endif |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 71 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 72 | #if(defined(__mips_hard_float) && __mips_hard_float != 0) |
| 73 | // Use floating-point coprocessor instructions. This flag is raised when |
| 74 | // -mhard-float is passed to the compiler. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 75 | const bool IsMipsSoftFloatABI = false; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 76 | #elif(defined(__mips_soft_float) && __mips_soft_float != 0) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 77 | // This flag is raised when -msoft-float is passed to the compiler. |
| 78 | // Although FPU is a base requirement for v8, soft-float ABI is used |
| 79 | // on soft-float systems with FPU kernel emulation. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 80 | const bool IsMipsSoftFloatABI = true; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 81 | #else |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 82 | const bool IsMipsSoftFloatABI = true; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 83 | #endif |
| 84 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 85 | #if defined(V8_TARGET_LITTLE_ENDIAN) |
| 86 | const uint32_t kHoleNanUpper32Offset = 4; |
| 87 | const uint32_t kHoleNanLower32Offset = 0; |
| 88 | #elif defined(V8_TARGET_BIG_ENDIAN) |
| 89 | const uint32_t kHoleNanUpper32Offset = 0; |
| 90 | const uint32_t kHoleNanLower32Offset = 4; |
| 91 | #else |
| 92 | #error Unknown endianness |
| 93 | #endif |
| 94 | |
| 95 | #ifndef FPU_MODE_FPXX |
| 96 | #define IsFp64Mode() \ |
| 97 | (kFpuMode == kFP64) |
| 98 | #else |
| 99 | #define IsFp64Mode() \ |
| 100 | (CpuFeatures::IsSupported(FP64FPU)) |
| 101 | #endif |
| 102 | |
| 103 | #ifndef _MIPS_ARCH_MIPS32RX |
| 104 | #define IsMipsArchVariant(check) \ |
| 105 | (kArchVariant == check) |
| 106 | #else |
| 107 | #define IsMipsArchVariant(check) \ |
Paul Lind | 18a7ebb | 2014-12-17 22:29:32 -0800 | [diff] [blame] | 108 | (CpuFeatures::IsSupported(static_cast<CpuFeature>(check))) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 109 | #endif |
| 110 | |
| 111 | |
| 112 | #define __STDC_FORMAT_MACROS |
| 113 | #include <inttypes.h> |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 114 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 115 | // Defines constants and accessor classes to assemble, disassemble and |
| 116 | // simulate MIPS32 instructions. |
| 117 | // |
| 118 | // See: MIPS32 Architecture For Programmers |
| 119 | // Volume II: The MIPS32 Instruction Set |
| 120 | // Try www.cs.cornell.edu/courses/cs3410/2008fa/MIPS_Vol2.pdf. |
| 121 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 122 | namespace v8 { |
| 123 | namespace internal { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 124 | |
| 125 | // ----------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 126 | // Registers and FPURegisters. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 127 | |
| 128 | // Number of general purpose registers. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 129 | const int kNumRegisters = 32; |
| 130 | const int kInvalidRegister = -1; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 131 | |
| 132 | // Number of registers with HI, LO, and pc. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 133 | const int kNumSimuRegisters = 35; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 134 | |
| 135 | // In the simulator, the PC register is simulated as the 34th register. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 136 | const int kPCRegister = 34; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 137 | |
| 138 | // Number coprocessor registers. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 139 | const int kNumFPURegisters = 32; |
| 140 | const int kInvalidFPURegister = -1; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 141 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 142 | // FPU (coprocessor 1) control registers. Currently only FCSR is implemented. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 143 | const int kFCSRRegister = 31; |
| 144 | const int kInvalidFPUControlRegister = -1; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 145 | const uint32_t kFPUInvalidResult = static_cast<uint32_t>(1 << 31) - 1; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 146 | const int32_t kFPUInvalidResultNegative = static_cast<int32_t>(1 << 31); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 147 | const uint64_t kFPU64InvalidResult = |
| 148 | static_cast<uint64_t>(static_cast<uint64_t>(1) << 63) - 1; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 149 | const int64_t kFPU64InvalidResultNegative = |
| 150 | static_cast<int64_t>(static_cast<uint64_t>(1) << 63); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 151 | |
| 152 | // FCSR constants. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 153 | const uint32_t kFCSRInexactFlagBit = 2; |
| 154 | const uint32_t kFCSRUnderflowFlagBit = 3; |
| 155 | const uint32_t kFCSROverflowFlagBit = 4; |
| 156 | const uint32_t kFCSRDivideByZeroFlagBit = 5; |
| 157 | const uint32_t kFCSRInvalidOpFlagBit = 6; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 158 | const uint32_t kFCSRNaN2008FlagBit = 18; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 159 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 160 | const uint32_t kFCSRInexactFlagMask = 1 << kFCSRInexactFlagBit; |
| 161 | const uint32_t kFCSRUnderflowFlagMask = 1 << kFCSRUnderflowFlagBit; |
| 162 | const uint32_t kFCSROverflowFlagMask = 1 << kFCSROverflowFlagBit; |
| 163 | const uint32_t kFCSRDivideByZeroFlagMask = 1 << kFCSRDivideByZeroFlagBit; |
| 164 | const uint32_t kFCSRInvalidOpFlagMask = 1 << kFCSRInvalidOpFlagBit; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 165 | const uint32_t kFCSRNaN2008FlagMask = 1 << kFCSRNaN2008FlagBit; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 166 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 167 | const uint32_t kFCSRFlagMask = |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 168 | kFCSRInexactFlagMask | |
| 169 | kFCSRUnderflowFlagMask | |
| 170 | kFCSROverflowFlagMask | |
| 171 | kFCSRDivideByZeroFlagMask | |
| 172 | kFCSRInvalidOpFlagMask; |
| 173 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 174 | const uint32_t kFCSRExceptionFlagMask = kFCSRFlagMask ^ kFCSRInexactFlagMask; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 175 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 176 | // 'pref' instruction hints |
| 177 | const int32_t kPrefHintLoad = 0; |
| 178 | const int32_t kPrefHintStore = 1; |
| 179 | const int32_t kPrefHintLoadStreamed = 4; |
| 180 | const int32_t kPrefHintStoreStreamed = 5; |
| 181 | const int32_t kPrefHintLoadRetained = 6; |
| 182 | const int32_t kPrefHintStoreRetained = 7; |
| 183 | const int32_t kPrefHintWritebackInvalidate = 25; |
| 184 | const int32_t kPrefHintPrepareForStore = 30; |
| 185 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 186 | // Helper functions for converting between register numbers and names. |
| 187 | class Registers { |
| 188 | public: |
| 189 | // Return the name of the register. |
| 190 | static const char* Name(int reg); |
| 191 | |
| 192 | // Lookup the register number for the name provided. |
| 193 | static int Number(const char* name); |
| 194 | |
| 195 | struct RegisterAlias { |
| 196 | int reg; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 197 | const char* name; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 198 | }; |
| 199 | |
| 200 | static const int32_t kMaxValue = 0x7fffffff; |
| 201 | static const int32_t kMinValue = 0x80000000; |
| 202 | |
| 203 | private: |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 204 | static const char* names_[kNumSimuRegisters]; |
| 205 | static const RegisterAlias aliases_[]; |
| 206 | }; |
| 207 | |
| 208 | // Helper functions for converting between register numbers and names. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 209 | class FPURegisters { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 210 | public: |
| 211 | // Return the name of the register. |
| 212 | static const char* Name(int reg); |
| 213 | |
| 214 | // Lookup the register number for the name provided. |
| 215 | static int Number(const char* name); |
| 216 | |
| 217 | struct RegisterAlias { |
| 218 | int creg; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 219 | const char* name; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 220 | }; |
| 221 | |
| 222 | private: |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 223 | static const char* names_[kNumFPURegisters]; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 224 | static const RegisterAlias aliases_[]; |
| 225 | }; |
| 226 | |
| 227 | |
| 228 | // ----------------------------------------------------------------------------- |
| 229 | // Instructions encoding constants. |
| 230 | |
| 231 | // On MIPS all instructions are 32 bits. |
| 232 | typedef int32_t Instr; |
| 233 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 234 | // Special Software Interrupt codes when used in the presence of the MIPS |
| 235 | // simulator. |
| 236 | enum SoftwareInterruptCodes { |
| 237 | // Transition to C code. |
| 238 | call_rt_redirected = 0xfffff |
| 239 | }; |
| 240 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 241 | // On MIPS Simulator breakpoints can have different codes: |
| 242 | // - Breaks between 0 and kMaxWatchpointCode are treated as simple watchpoints, |
| 243 | // the simulator will run through them and print the registers. |
| 244 | // - Breaks between kMaxWatchpointCode and kMaxStopCode are treated as stop() |
| 245 | // instructions (see Assembler::stop()). |
| 246 | // - Breaks larger than kMaxStopCode are simple breaks, dropping you into the |
| 247 | // debugger. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 248 | const uint32_t kMaxWatchpointCode = 31; |
| 249 | const uint32_t kMaxStopCode = 127; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 250 | STATIC_ASSERT(kMaxWatchpointCode < kMaxStopCode); |
| 251 | |
| 252 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 253 | // ----- Fields offset and length. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 254 | const int kOpcodeShift = 26; |
| 255 | const int kOpcodeBits = 6; |
| 256 | const int kRsShift = 21; |
| 257 | const int kRsBits = 5; |
| 258 | const int kRtShift = 16; |
| 259 | const int kRtBits = 5; |
| 260 | const int kRdShift = 11; |
| 261 | const int kRdBits = 5; |
| 262 | const int kSaShift = 6; |
| 263 | const int kSaBits = 5; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 264 | const int kLsaSaBits = 2; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 265 | const int kFunctionShift = 0; |
| 266 | const int kFunctionBits = 6; |
| 267 | const int kLuiShift = 16; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 268 | const int kBp2Shift = 6; |
| 269 | const int kBp2Bits = 2; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 270 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 271 | const int kImm16Shift = 0; |
| 272 | const int kImm16Bits = 16; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 273 | const int kImm18Shift = 0; |
| 274 | const int kImm18Bits = 18; |
| 275 | const int kImm19Shift = 0; |
| 276 | const int kImm19Bits = 19; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 277 | const int kImm21Shift = 0; |
| 278 | const int kImm21Bits = 21; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 279 | const int kImm26Shift = 0; |
| 280 | const int kImm26Bits = 26; |
| 281 | const int kImm28Shift = 0; |
| 282 | const int kImm28Bits = 28; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 283 | const int kImm32Shift = 0; |
| 284 | const int kImm32Bits = 32; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 285 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 286 | // In branches and jumps immediate fields point to words, not bytes, |
| 287 | // and are therefore shifted by 2. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 288 | const int kImmFieldShift = 2; |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 289 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 290 | const int kFrBits = 5; |
| 291 | const int kFrShift = 21; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 292 | const int kFsShift = 11; |
| 293 | const int kFsBits = 5; |
| 294 | const int kFtShift = 16; |
| 295 | const int kFtBits = 5; |
| 296 | const int kFdShift = 6; |
| 297 | const int kFdBits = 5; |
| 298 | const int kFCccShift = 8; |
| 299 | const int kFCccBits = 3; |
| 300 | const int kFBccShift = 18; |
| 301 | const int kFBccBits = 3; |
| 302 | const int kFBtrueShift = 16; |
| 303 | const int kFBtrueBits = 1; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 304 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 305 | // ----- Miscellaneous useful masks. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 306 | // Instruction bit masks. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 307 | const int kOpcodeMask = ((1 << kOpcodeBits) - 1) << kOpcodeShift; |
| 308 | const int kImm16Mask = ((1 << kImm16Bits) - 1) << kImm16Shift; |
| 309 | const int kImm18Mask = ((1 << kImm18Bits) - 1) << kImm18Shift; |
| 310 | const int kImm19Mask = ((1 << kImm19Bits) - 1) << kImm19Shift; |
| 311 | const int kImm21Mask = ((1 << kImm21Bits) - 1) << kImm21Shift; |
| 312 | const int kImm26Mask = ((1 << kImm26Bits) - 1) << kImm26Shift; |
| 313 | const int kImm28Mask = ((1 << kImm28Bits) - 1) << kImm28Shift; |
| 314 | const int kRsFieldMask = ((1 << kRsBits) - 1) << kRsShift; |
| 315 | const int kRtFieldMask = ((1 << kRtBits) - 1) << kRtShift; |
| 316 | const int kRdFieldMask = ((1 << kRdBits) - 1) << kRdShift; |
| 317 | const int kSaFieldMask = ((1 << kSaBits) - 1) << kSaShift; |
| 318 | const int kFunctionFieldMask = ((1 << kFunctionBits) - 1) << kFunctionShift; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 319 | // Misc masks. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 320 | const int kHiMask = 0xffff << 16; |
| 321 | const int kLoMask = 0xffff; |
| 322 | const int kSignMask = 0x80000000; |
| 323 | const int kJumpAddrMask = (1 << (kImm26Bits + kImmFieldShift)) - 1; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 324 | |
| 325 | // ----- MIPS Opcodes and Function Fields. |
| 326 | // We use this presentation to stay close to the table representation in |
| 327 | // MIPS32 Architecture For Programmers, Volume II: The MIPS32 Instruction Set. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 328 | enum Opcode : uint32_t { |
| 329 | SPECIAL = 0U << kOpcodeShift, |
| 330 | REGIMM = 1U << kOpcodeShift, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 331 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 332 | J = ((0U << 3) + 2) << kOpcodeShift, |
| 333 | JAL = ((0U << 3) + 3) << kOpcodeShift, |
| 334 | BEQ = ((0U << 3) + 4) << kOpcodeShift, |
| 335 | BNE = ((0U << 3) + 5) << kOpcodeShift, |
| 336 | BLEZ = ((0U << 3) + 6) << kOpcodeShift, |
| 337 | BGTZ = ((0U << 3) + 7) << kOpcodeShift, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 338 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 339 | ADDI = ((1U << 3) + 0) << kOpcodeShift, |
| 340 | ADDIU = ((1U << 3) + 1) << kOpcodeShift, |
| 341 | SLTI = ((1U << 3) + 2) << kOpcodeShift, |
| 342 | SLTIU = ((1U << 3) + 3) << kOpcodeShift, |
| 343 | ANDI = ((1U << 3) + 4) << kOpcodeShift, |
| 344 | ORI = ((1U << 3) + 5) << kOpcodeShift, |
| 345 | XORI = ((1U << 3) + 6) << kOpcodeShift, |
| 346 | LUI = ((1U << 3) + 7) << kOpcodeShift, // LUI/AUI family. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 347 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 348 | BEQC = ((2U << 3) + 0) << kOpcodeShift, |
| 349 | COP1 = ((2U << 3) + 1) << kOpcodeShift, // Coprocessor 1 class. |
| 350 | BEQL = ((2U << 3) + 4) << kOpcodeShift, |
| 351 | BNEL = ((2U << 3) + 5) << kOpcodeShift, |
| 352 | BLEZL = ((2U << 3) + 6) << kOpcodeShift, |
| 353 | BGTZL = ((2U << 3) + 7) << kOpcodeShift, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 354 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 355 | DADDI = ((3U << 3) + 0) << kOpcodeShift, // This is also BNEC. |
| 356 | SPECIAL2 = ((3U << 3) + 4) << kOpcodeShift, |
| 357 | SPECIAL3 = ((3U << 3) + 7) << kOpcodeShift, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 358 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 359 | LB = ((4U << 3) + 0) << kOpcodeShift, |
| 360 | LH = ((4U << 3) + 1) << kOpcodeShift, |
| 361 | LWL = ((4U << 3) + 2) << kOpcodeShift, |
| 362 | LW = ((4U << 3) + 3) << kOpcodeShift, |
| 363 | LBU = ((4U << 3) + 4) << kOpcodeShift, |
| 364 | LHU = ((4U << 3) + 5) << kOpcodeShift, |
| 365 | LWR = ((4U << 3) + 6) << kOpcodeShift, |
| 366 | SB = ((5U << 3) + 0) << kOpcodeShift, |
| 367 | SH = ((5U << 3) + 1) << kOpcodeShift, |
| 368 | SWL = ((5U << 3) + 2) << kOpcodeShift, |
| 369 | SW = ((5U << 3) + 3) << kOpcodeShift, |
| 370 | SWR = ((5U << 3) + 6) << kOpcodeShift, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 371 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 372 | LWC1 = ((6U << 3) + 1) << kOpcodeShift, |
| 373 | BC = ((6U << 3) + 2) << kOpcodeShift, |
| 374 | LDC1 = ((6U << 3) + 5) << kOpcodeShift, |
| 375 | POP66 = ((6U << 3) + 6) << kOpcodeShift, // beqzc, jic |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 376 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 377 | PREF = ((6U << 3) + 3) << kOpcodeShift, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 378 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 379 | SWC1 = ((7U << 3) + 1) << kOpcodeShift, |
| 380 | BALC = ((7U << 3) + 2) << kOpcodeShift, |
| 381 | PCREL = ((7U << 3) + 3) << kOpcodeShift, |
| 382 | SDC1 = ((7U << 3) + 5) << kOpcodeShift, |
| 383 | POP76 = ((7U << 3) + 6) << kOpcodeShift, // bnezc, jialc |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 384 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 385 | COP1X = ((1U << 4) + 3) << kOpcodeShift, |
| 386 | |
| 387 | // New r6 instruction. |
| 388 | POP06 = BLEZ, // bgeuc/bleuc, blezalc, bgezalc |
| 389 | POP07 = BGTZ, // bltuc/bgtuc, bgtzalc, bltzalc |
| 390 | POP10 = ADDI, // beqzalc, bovc, beqc |
| 391 | POP26 = BLEZL, // bgezc, blezc, bgec/blec |
| 392 | POP27 = BGTZL, // bgtzc, bltzc, bltc/bgtc |
| 393 | POP30 = DADDI, // bnezalc, bvnc, bnec |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 394 | }; |
| 395 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 396 | enum SecondaryField : uint32_t { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 397 | // SPECIAL Encoding of Function Field. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 398 | SLL = ((0U << 3) + 0), |
| 399 | MOVCI = ((0U << 3) + 1), |
| 400 | SRL = ((0U << 3) + 2), |
| 401 | SRA = ((0U << 3) + 3), |
| 402 | SLLV = ((0U << 3) + 4), |
| 403 | LSA = ((0U << 3) + 5), |
| 404 | SRLV = ((0U << 3) + 6), |
| 405 | SRAV = ((0U << 3) + 7), |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 406 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 407 | JR = ((1U << 3) + 0), |
| 408 | JALR = ((1U << 3) + 1), |
| 409 | MOVZ = ((1U << 3) + 2), |
| 410 | MOVN = ((1U << 3) + 3), |
| 411 | BREAK = ((1U << 3) + 5), |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 412 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 413 | MFHI = ((2U << 3) + 0), |
| 414 | CLZ_R6 = ((2U << 3) + 0), |
| 415 | CLO_R6 = ((2U << 3) + 1), |
| 416 | MFLO = ((2U << 3) + 2), |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 417 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 418 | MULT = ((3U << 3) + 0), |
| 419 | MULTU = ((3U << 3) + 1), |
| 420 | DIV = ((3U << 3) + 2), |
| 421 | DIVU = ((3U << 3) + 3), |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 422 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 423 | ADD = ((4U << 3) + 0), |
| 424 | ADDU = ((4U << 3) + 1), |
| 425 | SUB = ((4U << 3) + 2), |
| 426 | SUBU = ((4U << 3) + 3), |
| 427 | AND = ((4U << 3) + 4), |
| 428 | OR = ((4U << 3) + 5), |
| 429 | XOR = ((4U << 3) + 6), |
| 430 | NOR = ((4U << 3) + 7), |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 431 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 432 | SLT = ((5U << 3) + 2), |
| 433 | SLTU = ((5U << 3) + 3), |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 434 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 435 | TGE = ((6U << 3) + 0), |
| 436 | TGEU = ((6U << 3) + 1), |
| 437 | TLT = ((6U << 3) + 2), |
| 438 | TLTU = ((6U << 3) + 3), |
| 439 | TEQ = ((6U << 3) + 4), |
| 440 | SELEQZ_S = ((6U << 3) + 5), |
| 441 | TNE = ((6U << 3) + 6), |
| 442 | SELNEZ_S = ((6U << 3) + 7), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 443 | |
| 444 | // Multiply integers in r6. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 445 | MUL_MUH = ((3U << 3) + 0), // MUL, MUH. |
| 446 | MUL_MUH_U = ((3U << 3) + 1), // MUL_U, MUH_U. |
| 447 | RINT = ((3U << 3) + 2), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 448 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 449 | MUL_OP = ((0U << 3) + 2), |
| 450 | MUH_OP = ((0U << 3) + 3), |
| 451 | DIV_OP = ((0U << 3) + 2), |
| 452 | MOD_OP = ((0U << 3) + 3), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 453 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 454 | DIV_MOD = ((3U << 3) + 2), |
| 455 | DIV_MOD_U = ((3U << 3) + 3), |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 456 | |
| 457 | // SPECIAL2 Encoding of Function Field. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 458 | MUL = ((0U << 3) + 2), |
| 459 | CLZ = ((4U << 3) + 0), |
| 460 | CLO = ((4U << 3) + 1), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 461 | |
| 462 | // SPECIAL3 Encoding of Function Field. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 463 | EXT = ((0U << 3) + 0), |
| 464 | INS = ((0U << 3) + 4), |
| 465 | BSHFL = ((4U << 3) + 0), |
| 466 | |
| 467 | // SPECIAL3 Encoding of sa Field. |
| 468 | BITSWAP = ((0U << 3) + 0), |
| 469 | ALIGN = ((0U << 3) + 2), |
| 470 | WSBH = ((0U << 3) + 2), |
| 471 | SEB = ((2U << 3) + 0), |
| 472 | SEH = ((3U << 3) + 0), |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 473 | |
| 474 | // REGIMM encoding of rt Field. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 475 | BLTZ = ((0U << 3) + 0) << 16, |
| 476 | BGEZ = ((0U << 3) + 1) << 16, |
| 477 | BLTZAL = ((2U << 3) + 0) << 16, |
| 478 | BGEZAL = ((2U << 3) + 1) << 16, |
| 479 | BGEZALL = ((2U << 3) + 3) << 16, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 480 | |
| 481 | // COP1 Encoding of rs Field. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 482 | MFC1 = ((0U << 3) + 0) << 21, |
| 483 | CFC1 = ((0U << 3) + 2) << 21, |
| 484 | MFHC1 = ((0U << 3) + 3) << 21, |
| 485 | MTC1 = ((0U << 3) + 4) << 21, |
| 486 | CTC1 = ((0U << 3) + 6) << 21, |
| 487 | MTHC1 = ((0U << 3) + 7) << 21, |
| 488 | BC1 = ((1U << 3) + 0) << 21, |
| 489 | S = ((2U << 3) + 0) << 21, |
| 490 | D = ((2U << 3) + 1) << 21, |
| 491 | W = ((2U << 3) + 4) << 21, |
| 492 | L = ((2U << 3) + 5) << 21, |
| 493 | PS = ((2U << 3) + 6) << 21, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 494 | // COP1 Encoding of Function Field When rs=S. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 495 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 496 | ADD_S = ((0U << 3) + 0), |
| 497 | SUB_S = ((0U << 3) + 1), |
| 498 | MUL_S = ((0U << 3) + 2), |
| 499 | DIV_S = ((0U << 3) + 3), |
| 500 | ABS_S = ((0U << 3) + 5), |
| 501 | SQRT_S = ((0U << 3) + 4), |
| 502 | MOV_S = ((0U << 3) + 6), |
| 503 | NEG_S = ((0U << 3) + 7), |
| 504 | ROUND_L_S = ((1U << 3) + 0), |
| 505 | TRUNC_L_S = ((1U << 3) + 1), |
| 506 | CEIL_L_S = ((1U << 3) + 2), |
| 507 | FLOOR_L_S = ((1U << 3) + 3), |
| 508 | ROUND_W_S = ((1U << 3) + 4), |
| 509 | TRUNC_W_S = ((1U << 3) + 5), |
| 510 | CEIL_W_S = ((1U << 3) + 6), |
| 511 | FLOOR_W_S = ((1U << 3) + 7), |
| 512 | RECIP_S = ((2U << 3) + 5), |
| 513 | RSQRT_S = ((2U << 3) + 6), |
| 514 | CLASS_S = ((3U << 3) + 3), |
| 515 | CVT_D_S = ((4U << 3) + 1), |
| 516 | CVT_W_S = ((4U << 3) + 4), |
| 517 | CVT_L_S = ((4U << 3) + 5), |
| 518 | CVT_PS_S = ((4U << 3) + 6), |
| 519 | |
| 520 | // COP1 Encoding of Function Field When rs=D. |
| 521 | ADD_D = ((0U << 3) + 0), |
| 522 | SUB_D = ((0U << 3) + 1), |
| 523 | MUL_D = ((0U << 3) + 2), |
| 524 | DIV_D = ((0U << 3) + 3), |
| 525 | SQRT_D = ((0U << 3) + 4), |
| 526 | ABS_D = ((0U << 3) + 5), |
| 527 | MOV_D = ((0U << 3) + 6), |
| 528 | NEG_D = ((0U << 3) + 7), |
| 529 | ROUND_L_D = ((1U << 3) + 0), |
| 530 | TRUNC_L_D = ((1U << 3) + 1), |
| 531 | CEIL_L_D = ((1U << 3) + 2), |
| 532 | FLOOR_L_D = ((1U << 3) + 3), |
| 533 | ROUND_W_D = ((1U << 3) + 4), |
| 534 | TRUNC_W_D = ((1U << 3) + 5), |
| 535 | CEIL_W_D = ((1U << 3) + 6), |
| 536 | FLOOR_W_D = ((1U << 3) + 7), |
| 537 | RECIP_D = ((2U << 3) + 5), |
| 538 | RSQRT_D = ((2U << 3) + 6), |
| 539 | CLASS_D = ((3U << 3) + 3), |
| 540 | MIN = ((3U << 3) + 4), |
| 541 | MINA = ((3U << 3) + 5), |
| 542 | MAX = ((3U << 3) + 6), |
| 543 | MAXA = ((3U << 3) + 7), |
| 544 | CVT_S_D = ((4U << 3) + 0), |
| 545 | CVT_W_D = ((4U << 3) + 4), |
| 546 | CVT_L_D = ((4U << 3) + 5), |
| 547 | C_F_D = ((6U << 3) + 0), |
| 548 | C_UN_D = ((6U << 3) + 1), |
| 549 | C_EQ_D = ((6U << 3) + 2), |
| 550 | C_UEQ_D = ((6U << 3) + 3), |
| 551 | C_OLT_D = ((6U << 3) + 4), |
| 552 | C_ULT_D = ((6U << 3) + 5), |
| 553 | C_OLE_D = ((6U << 3) + 6), |
| 554 | C_ULE_D = ((6U << 3) + 7), |
| 555 | |
| 556 | // COP1 Encoding of Function Field When rs=W or L. |
| 557 | CVT_S_W = ((4U << 3) + 0), |
| 558 | CVT_D_W = ((4U << 3) + 1), |
| 559 | CVT_S_L = ((4U << 3) + 0), |
| 560 | CVT_D_L = ((4U << 3) + 1), |
| 561 | BC1EQZ = ((2U << 2) + 1) << 21, |
| 562 | BC1NEZ = ((3U << 2) + 1) << 21, |
| 563 | // COP1 CMP positive predicates Bit 5..4 = 00. |
| 564 | CMP_AF = ((0U << 3) + 0), |
| 565 | CMP_UN = ((0U << 3) + 1), |
| 566 | CMP_EQ = ((0U << 3) + 2), |
| 567 | CMP_UEQ = ((0U << 3) + 3), |
| 568 | CMP_LT = ((0U << 3) + 4), |
| 569 | CMP_ULT = ((0U << 3) + 5), |
| 570 | CMP_LE = ((0U << 3) + 6), |
| 571 | CMP_ULE = ((0U << 3) + 7), |
| 572 | CMP_SAF = ((1U << 3) + 0), |
| 573 | CMP_SUN = ((1U << 3) + 1), |
| 574 | CMP_SEQ = ((1U << 3) + 2), |
| 575 | CMP_SUEQ = ((1U << 3) + 3), |
| 576 | CMP_SSLT = ((1U << 3) + 4), |
| 577 | CMP_SSULT = ((1U << 3) + 5), |
| 578 | CMP_SLE = ((1U << 3) + 6), |
| 579 | CMP_SULE = ((1U << 3) + 7), |
| 580 | // COP1 CMP negative predicates Bit 5..4 = 01. |
| 581 | CMP_AT = ((2U << 3) + 0), // Reserved, not implemented. |
| 582 | CMP_OR = ((2U << 3) + 1), |
| 583 | CMP_UNE = ((2U << 3) + 2), |
| 584 | CMP_NE = ((2U << 3) + 3), |
| 585 | CMP_UGE = ((2U << 3) + 4), // Reserved, not implemented. |
| 586 | CMP_OGE = ((2U << 3) + 5), // Reserved, not implemented. |
| 587 | CMP_UGT = ((2U << 3) + 6), // Reserved, not implemented. |
| 588 | CMP_OGT = ((2U << 3) + 7), // Reserved, not implemented. |
| 589 | CMP_SAT = ((3U << 3) + 0), // Reserved, not implemented. |
| 590 | CMP_SOR = ((3U << 3) + 1), |
| 591 | CMP_SUNE = ((3U << 3) + 2), |
| 592 | CMP_SNE = ((3U << 3) + 3), |
| 593 | CMP_SUGE = ((3U << 3) + 4), // Reserved, not implemented. |
| 594 | CMP_SOGE = ((3U << 3) + 5), // Reserved, not implemented. |
| 595 | CMP_SUGT = ((3U << 3) + 6), // Reserved, not implemented. |
| 596 | CMP_SOGT = ((3U << 3) + 7), // Reserved, not implemented. |
| 597 | |
| 598 | SEL = ((2U << 3) + 0), |
| 599 | MOVZ_C = ((2U << 3) + 2), |
| 600 | MOVN_C = ((2U << 3) + 3), |
| 601 | SELEQZ_C = ((2U << 3) + 4), // COP1 on FPR registers. |
| 602 | MOVF = ((2U << 3) + 1), // Function field for MOVT.fmt and MOVF.fmt |
| 603 | SELNEZ_C = ((2U << 3) + 7), // COP1 on FPR registers. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 604 | // COP1 Encoding of Function Field When rs=PS. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 605 | // COP1X Encoding of Function Field. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 606 | MADD_D = ((4U << 3) + 1), |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 607 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 608 | // PCREL Encoding of rt Field. |
| 609 | ADDIUPC = ((0U << 2) + 0), |
| 610 | LWPC = ((0U << 2) + 1), |
| 611 | AUIPC = ((3U << 3) + 6), |
| 612 | ALUIPC = ((3U << 3) + 7), |
| 613 | |
| 614 | // POP66 Encoding of rs Field. |
| 615 | JIC = ((0U << 5) + 0), |
| 616 | |
| 617 | // POP76 Encoding of rs Field. |
| 618 | JIALC = ((0U << 5) + 0), |
| 619 | |
| 620 | NULLSF = 0U |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 621 | }; |
| 622 | |
| 623 | |
| 624 | // ----- Emulated conditions. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 625 | // On MIPS we use this enum to abstract from conditional branch instructions. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 626 | // The 'U' prefix is used to specify unsigned comparisons. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 627 | // Opposite conditions must be paired as odd/even numbers |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 628 | // because 'NegateCondition' function flips LSB to negate condition. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 629 | enum Condition { |
| 630 | // Any value < 0 is considered no_condition. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 631 | kNoCondition = -1, |
| 632 | overflow = 0, |
| 633 | no_overflow = 1, |
| 634 | Uless = 2, |
| 635 | Ugreater_equal = 3, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 636 | Uless_equal = 4, |
| 637 | Ugreater = 5, |
| 638 | equal = 6, |
| 639 | not_equal = 7, // Unordered or Not Equal. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 640 | negative = 8, |
| 641 | positive = 9, |
| 642 | parity_even = 10, |
| 643 | parity_odd = 11, |
| 644 | less = 12, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 645 | greater_equal = 13, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 646 | less_equal = 14, |
| 647 | greater = 15, |
| 648 | ueq = 16, // Unordered or Equal. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 649 | ogl = 17, // Ordered and Not Equal. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 650 | cc_always = 18, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 651 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 652 | // Aliases. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 653 | carry = Uless, |
| 654 | not_carry = Ugreater_equal, |
| 655 | zero = equal, |
| 656 | eq = equal, |
| 657 | not_zero = not_equal, |
| 658 | ne = not_equal, |
| 659 | nz = not_equal, |
| 660 | sign = negative, |
| 661 | not_sign = positive, |
| 662 | mi = negative, |
| 663 | pl = positive, |
| 664 | hi = Ugreater, |
| 665 | ls = Uless_equal, |
| 666 | ge = greater_equal, |
| 667 | lt = less, |
| 668 | gt = greater, |
| 669 | le = less_equal, |
| 670 | hs = Ugreater_equal, |
| 671 | lo = Uless, |
| 672 | al = cc_always, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 673 | ult = Uless, |
| 674 | uge = Ugreater_equal, |
| 675 | ule = Uless_equal, |
| 676 | ugt = Ugreater, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 677 | cc_default = kNoCondition |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 678 | }; |
| 679 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 680 | |
| 681 | // Returns the equivalent of !cc. |
| 682 | // Negation of the default kNoCondition (-1) results in a non-default |
| 683 | // no_condition value (-2). As long as tests for no_condition check |
| 684 | // for condition < 0, this will work as expected. |
| 685 | inline Condition NegateCondition(Condition cc) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 686 | DCHECK(cc != cc_always); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 687 | return static_cast<Condition>(cc ^ 1); |
| 688 | } |
| 689 | |
| 690 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 691 | inline Condition NegateFpuCondition(Condition cc) { |
| 692 | DCHECK(cc != cc_always); |
| 693 | switch (cc) { |
| 694 | case ult: |
| 695 | return ge; |
| 696 | case ugt: |
| 697 | return le; |
| 698 | case uge: |
| 699 | return lt; |
| 700 | case ule: |
| 701 | return gt; |
| 702 | case lt: |
| 703 | return uge; |
| 704 | case gt: |
| 705 | return ule; |
| 706 | case ge: |
| 707 | return ult; |
| 708 | case le: |
| 709 | return ugt; |
| 710 | case eq: |
| 711 | return ne; |
| 712 | case ne: |
| 713 | return eq; |
| 714 | case ueq: |
| 715 | return ogl; |
| 716 | case ogl: |
| 717 | return ueq; |
| 718 | default: |
| 719 | return cc; |
| 720 | } |
| 721 | } |
| 722 | |
| 723 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 724 | // Commute a condition such that {a cond b == b cond' a}. |
| 725 | inline Condition CommuteCondition(Condition cc) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 726 | switch (cc) { |
| 727 | case Uless: |
| 728 | return Ugreater; |
| 729 | case Ugreater: |
| 730 | return Uless; |
| 731 | case Ugreater_equal: |
| 732 | return Uless_equal; |
| 733 | case Uless_equal: |
| 734 | return Ugreater_equal; |
| 735 | case less: |
| 736 | return greater; |
| 737 | case greater: |
| 738 | return less; |
| 739 | case greater_equal: |
| 740 | return less_equal; |
| 741 | case less_equal: |
| 742 | return greater_equal; |
| 743 | default: |
| 744 | return cc; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 745 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 746 | } |
| 747 | |
| 748 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 749 | // ----- Coprocessor conditions. |
| 750 | enum FPUCondition { |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 751 | kNoFPUCondition = -1, |
| 752 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 753 | F = 0x00, // False. |
| 754 | UN = 0x01, // Unordered. |
| 755 | EQ = 0x02, // Equal. |
| 756 | UEQ = 0x03, // Unordered or Equal. |
| 757 | OLT = 0x04, // Ordered or Less Than, on Mips release < 6. |
| 758 | LT = 0x04, // Ordered or Less Than, on Mips release >= 6. |
| 759 | ULT = 0x05, // Unordered or Less Than. |
| 760 | OLE = 0x06, // Ordered or Less Than or Equal, on Mips release < 6. |
| 761 | LE = 0x06, // Ordered or Less Than or Equal, on Mips release >= 6. |
| 762 | ULE = 0x07, // Unordered or Less Than or Equal. |
| 763 | |
| 764 | // Following constants are available on Mips release >= 6 only. |
| 765 | ORD = 0x11, // Ordered, on Mips release >= 6. |
| 766 | UNE = 0x12, // Not equal, on Mips release >= 6. |
| 767 | NE = 0x13, // Ordered Greater Than or Less Than. on Mips >= 6 only. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 768 | }; |
| 769 | |
| 770 | |
| 771 | // FPU rounding modes. |
| 772 | enum FPURoundingMode { |
| 773 | RN = 0 << 0, // Round to Nearest. |
| 774 | RZ = 1 << 0, // Round towards zero. |
| 775 | RP = 2 << 0, // Round towards Plus Infinity. |
| 776 | RM = 3 << 0, // Round towards Minus Infinity. |
| 777 | |
| 778 | // Aliases. |
| 779 | kRoundToNearest = RN, |
| 780 | kRoundToZero = RZ, |
| 781 | kRoundToPlusInf = RP, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 782 | kRoundToMinusInf = RM, |
| 783 | |
| 784 | mode_round = RN, |
| 785 | mode_ceil = RP, |
| 786 | mode_floor = RM, |
| 787 | mode_trunc = RZ |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 788 | }; |
| 789 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 790 | const uint32_t kFPURoundingModeMask = 3 << 0; |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 791 | |
| 792 | enum CheckForInexactConversion { |
| 793 | kCheckForInexactConversion, |
| 794 | kDontCheckForInexactConversion |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 795 | }; |
| 796 | |
| 797 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 798 | // ----------------------------------------------------------------------------- |
| 799 | // Hints. |
| 800 | |
| 801 | // Branch hints are not used on the MIPS. They are defined so that they can |
| 802 | // appear in shared function signatures, but will be ignored in MIPS |
| 803 | // implementations. |
| 804 | enum Hint { |
| 805 | no_hint = 0 |
| 806 | }; |
| 807 | |
| 808 | |
| 809 | inline Hint NegateHint(Hint hint) { |
| 810 | return no_hint; |
| 811 | } |
| 812 | |
| 813 | |
| 814 | // ----------------------------------------------------------------------------- |
| 815 | // Specific instructions, constants, and masks. |
| 816 | // These constants are declared in assembler-mips.cc, as they use named |
| 817 | // registers and other constants. |
| 818 | |
| 819 | // addiu(sp, sp, 4) aka Pop() operation or part of Pop(r) |
| 820 | // operations as post-increment of sp. |
| 821 | extern const Instr kPopInstruction; |
| 822 | // addiu(sp, sp, -4) part of Push(r) operation as pre-decrement of sp. |
| 823 | extern const Instr kPushInstruction; |
| 824 | // sw(r, MemOperand(sp, 0)) |
| 825 | extern const Instr kPushRegPattern; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 826 | // lw(r, MemOperand(sp, 0)) |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 827 | extern const Instr kPopRegPattern; |
| 828 | extern const Instr kLwRegFpOffsetPattern; |
| 829 | extern const Instr kSwRegFpOffsetPattern; |
| 830 | extern const Instr kLwRegFpNegOffsetPattern; |
| 831 | extern const Instr kSwRegFpNegOffsetPattern; |
| 832 | // A mask for the Rt register for push, pop, lw, sw instructions. |
| 833 | extern const Instr kRtMask; |
| 834 | extern const Instr kLwSwInstrTypeMask; |
| 835 | extern const Instr kLwSwInstrArgumentMask; |
| 836 | extern const Instr kLwSwOffsetMask; |
| 837 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 838 | // Break 0xfffff, reserved for redirected real time call. |
| 839 | const Instr rtCallRedirInstr = SPECIAL | BREAK | call_rt_redirected << 6; |
| 840 | // A nop instruction. (Encoding of sll 0 0 0). |
| 841 | const Instr nopInstr = 0; |
| 842 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 843 | static constexpr uint64_t OpcodeToBitNumber(Opcode opcode) { |
| 844 | return 1ULL << (static_cast<uint32_t>(opcode) >> kOpcodeShift); |
| 845 | } |
| 846 | |
| 847 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 848 | class Instruction { |
| 849 | public: |
| 850 | enum { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 851 | kInstrSize = 4, |
| 852 | kInstrSizeLog2 = 2, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 853 | // On MIPS PC cannot actually be directly accessed. We behave as if PC was |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 854 | // always the value of the current instruction being executed. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 855 | kPCReadOffset = 0 |
| 856 | }; |
| 857 | |
| 858 | // Get the raw instruction bits. |
| 859 | inline Instr InstructionBits() const { |
| 860 | return *reinterpret_cast<const Instr*>(this); |
| 861 | } |
| 862 | |
| 863 | // Set the raw instruction bits to value. |
| 864 | inline void SetInstructionBits(Instr value) { |
| 865 | *reinterpret_cast<Instr*>(this) = value; |
| 866 | } |
| 867 | |
| 868 | // Read one particular bit out of the instruction bits. |
| 869 | inline int Bit(int nr) const { |
| 870 | return (InstructionBits() >> nr) & 1; |
| 871 | } |
| 872 | |
| 873 | // Read a bit field out of the instruction bits. |
| 874 | inline int Bits(int hi, int lo) const { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 875 | return (InstructionBits() >> lo) & ((2U << (hi - lo)) - 1); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 876 | } |
| 877 | |
| 878 | // Instruction type. |
| 879 | enum Type { |
| 880 | kRegisterType, |
| 881 | kImmediateType, |
| 882 | kJumpType, |
| 883 | kUnsupported = -1 |
| 884 | }; |
| 885 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 886 | enum TypeChecks { NORMAL, EXTRA }; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 887 | |
| 888 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 889 | static constexpr uint64_t kOpcodeImmediateTypeMask = |
| 890 | OpcodeToBitNumber(REGIMM) | OpcodeToBitNumber(BEQ) | |
| 891 | OpcodeToBitNumber(BNE) | OpcodeToBitNumber(BLEZ) | |
| 892 | OpcodeToBitNumber(BGTZ) | OpcodeToBitNumber(ADDI) | |
| 893 | OpcodeToBitNumber(DADDI) | OpcodeToBitNumber(ADDIU) | |
| 894 | OpcodeToBitNumber(SLTI) | OpcodeToBitNumber(SLTIU) | |
| 895 | OpcodeToBitNumber(ANDI) | OpcodeToBitNumber(ORI) | |
| 896 | OpcodeToBitNumber(XORI) | OpcodeToBitNumber(LUI) | |
| 897 | OpcodeToBitNumber(BEQL) | OpcodeToBitNumber(BNEL) | |
| 898 | OpcodeToBitNumber(BLEZL) | OpcodeToBitNumber(BGTZL) | |
| 899 | OpcodeToBitNumber(POP66) | OpcodeToBitNumber(POP76) | |
| 900 | OpcodeToBitNumber(LB) | OpcodeToBitNumber(LH) | OpcodeToBitNumber(LWL) | |
| 901 | OpcodeToBitNumber(LW) | OpcodeToBitNumber(LBU) | OpcodeToBitNumber(LHU) | |
| 902 | OpcodeToBitNumber(LWR) | OpcodeToBitNumber(SB) | OpcodeToBitNumber(SH) | |
| 903 | OpcodeToBitNumber(SWL) | OpcodeToBitNumber(SW) | OpcodeToBitNumber(SWR) | |
| 904 | OpcodeToBitNumber(LWC1) | OpcodeToBitNumber(LDC1) | |
| 905 | OpcodeToBitNumber(SWC1) | OpcodeToBitNumber(SDC1) | |
| 906 | OpcodeToBitNumber(PCREL) | OpcodeToBitNumber(BC) | |
| 907 | OpcodeToBitNumber(BALC); |
| 908 | |
| 909 | #define FunctionFieldToBitNumber(function) (1ULL << function) |
| 910 | |
| 911 | static const uint64_t kFunctionFieldRegisterTypeMask = |
| 912 | FunctionFieldToBitNumber(JR) | FunctionFieldToBitNumber(JALR) | |
| 913 | FunctionFieldToBitNumber(BREAK) | FunctionFieldToBitNumber(SLL) | |
| 914 | FunctionFieldToBitNumber(SRL) | FunctionFieldToBitNumber(SRA) | |
| 915 | FunctionFieldToBitNumber(SLLV) | FunctionFieldToBitNumber(SRLV) | |
| 916 | FunctionFieldToBitNumber(SRAV) | FunctionFieldToBitNumber(LSA) | |
| 917 | FunctionFieldToBitNumber(MFHI) | FunctionFieldToBitNumber(MFLO) | |
| 918 | FunctionFieldToBitNumber(MULT) | FunctionFieldToBitNumber(MULTU) | |
| 919 | FunctionFieldToBitNumber(DIV) | FunctionFieldToBitNumber(DIVU) | |
| 920 | FunctionFieldToBitNumber(ADD) | FunctionFieldToBitNumber(ADDU) | |
| 921 | FunctionFieldToBitNumber(SUB) | FunctionFieldToBitNumber(SUBU) | |
| 922 | FunctionFieldToBitNumber(AND) | FunctionFieldToBitNumber(OR) | |
| 923 | FunctionFieldToBitNumber(XOR) | FunctionFieldToBitNumber(NOR) | |
| 924 | FunctionFieldToBitNumber(SLT) | FunctionFieldToBitNumber(SLTU) | |
| 925 | FunctionFieldToBitNumber(TGE) | FunctionFieldToBitNumber(TGEU) | |
| 926 | FunctionFieldToBitNumber(TLT) | FunctionFieldToBitNumber(TLTU) | |
| 927 | FunctionFieldToBitNumber(TEQ) | FunctionFieldToBitNumber(TNE) | |
| 928 | FunctionFieldToBitNumber(MOVZ) | FunctionFieldToBitNumber(MOVN) | |
| 929 | FunctionFieldToBitNumber(MOVCI) | FunctionFieldToBitNumber(SELEQZ_S) | |
| 930 | FunctionFieldToBitNumber(SELNEZ_S); |
| 931 | |
| 932 | |
| 933 | // Get the encoding type of the instruction. |
| 934 | inline Type InstructionType(TypeChecks checks = NORMAL) const; |
| 935 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 936 | // Accessors for the different named fields used in the MIPS encoding. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 937 | inline Opcode OpcodeValue() const { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 938 | return static_cast<Opcode>( |
| 939 | Bits(kOpcodeShift + kOpcodeBits - 1, kOpcodeShift)); |
| 940 | } |
| 941 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 942 | inline int RsValue() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 943 | DCHECK(InstructionType() == kRegisterType || |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 944 | InstructionType() == kImmediateType); |
| 945 | return Bits(kRsShift + kRsBits - 1, kRsShift); |
| 946 | } |
| 947 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 948 | inline int RtValue() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 949 | DCHECK(InstructionType() == kRegisterType || |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 950 | InstructionType() == kImmediateType); |
| 951 | return Bits(kRtShift + kRtBits - 1, kRtShift); |
| 952 | } |
| 953 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 954 | inline int RdValue() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 955 | DCHECK(InstructionType() == kRegisterType); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 956 | return Bits(kRdShift + kRdBits - 1, kRdShift); |
| 957 | } |
| 958 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 959 | inline int SaValue() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 960 | DCHECK(InstructionType() == kRegisterType); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 961 | return Bits(kSaShift + kSaBits - 1, kSaShift); |
| 962 | } |
| 963 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 964 | inline int LsaSaValue() const { |
| 965 | DCHECK(InstructionType() == kRegisterType); |
| 966 | return Bits(kSaShift + kLsaSaBits - 1, kSaShift); |
| 967 | } |
| 968 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 969 | inline int FunctionValue() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 970 | DCHECK(InstructionType() == kRegisterType || |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 971 | InstructionType() == kImmediateType); |
| 972 | return Bits(kFunctionShift + kFunctionBits - 1, kFunctionShift); |
| 973 | } |
| 974 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 975 | inline int FdValue() const { |
| 976 | return Bits(kFdShift + kFdBits - 1, kFdShift); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 977 | } |
| 978 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 979 | inline int FsValue() const { |
| 980 | return Bits(kFsShift + kFsBits - 1, kFsShift); |
| 981 | } |
| 982 | |
| 983 | inline int FtValue() const { |
| 984 | return Bits(kFtShift + kFtBits - 1, kFtShift); |
| 985 | } |
| 986 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 987 | inline int FrValue() const { |
| 988 | return Bits(kFrShift + kFrBits -1, kFrShift); |
| 989 | } |
| 990 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 991 | inline int Bp2Value() const { |
| 992 | DCHECK(InstructionType() == kRegisterType); |
| 993 | return Bits(kBp2Shift + kBp2Bits - 1, kBp2Shift); |
| 994 | } |
| 995 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 996 | // Float Compare condition code instruction bits. |
| 997 | inline int FCccValue() const { |
| 998 | return Bits(kFCccShift + kFCccBits - 1, kFCccShift); |
| 999 | } |
| 1000 | |
| 1001 | // Float Branch condition code instruction bits. |
| 1002 | inline int FBccValue() const { |
| 1003 | return Bits(kFBccShift + kFBccBits - 1, kFBccShift); |
| 1004 | } |
| 1005 | |
| 1006 | // Float Branch true/false instruction bit. |
| 1007 | inline int FBtrueValue() const { |
| 1008 | return Bits(kFBtrueShift + kFBtrueBits - 1, kFBtrueShift); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1009 | } |
| 1010 | |
| 1011 | // Return the fields at their original place in the instruction encoding. |
| 1012 | inline Opcode OpcodeFieldRaw() const { |
| 1013 | return static_cast<Opcode>(InstructionBits() & kOpcodeMask); |
| 1014 | } |
| 1015 | |
| 1016 | inline int RsFieldRaw() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1017 | DCHECK(InstructionType() == kRegisterType || |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1018 | InstructionType() == kImmediateType); |
| 1019 | return InstructionBits() & kRsFieldMask; |
| 1020 | } |
| 1021 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1022 | // Same as above function, but safe to call within InstructionType(). |
| 1023 | inline int RsFieldRawNoAssert() const { |
| 1024 | return InstructionBits() & kRsFieldMask; |
| 1025 | } |
| 1026 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1027 | inline int RtFieldRaw() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1028 | DCHECK(InstructionType() == kRegisterType || |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1029 | InstructionType() == kImmediateType); |
| 1030 | return InstructionBits() & kRtFieldMask; |
| 1031 | } |
| 1032 | |
| 1033 | inline int RdFieldRaw() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1034 | DCHECK(InstructionType() == kRegisterType); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1035 | return InstructionBits() & kRdFieldMask; |
| 1036 | } |
| 1037 | |
| 1038 | inline int SaFieldRaw() const { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1039 | return InstructionBits() & kSaFieldMask; |
| 1040 | } |
| 1041 | |
| 1042 | inline int FunctionFieldRaw() const { |
| 1043 | return InstructionBits() & kFunctionFieldMask; |
| 1044 | } |
| 1045 | |
| 1046 | // Get the secondary field according to the opcode. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1047 | inline int SecondaryValue() const { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1048 | Opcode op = OpcodeFieldRaw(); |
| 1049 | switch (op) { |
| 1050 | case SPECIAL: |
| 1051 | case SPECIAL2: |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1052 | return FunctionValue(); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1053 | case COP1: |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1054 | return RsValue(); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1055 | case REGIMM: |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1056 | return RtValue(); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1057 | default: |
| 1058 | return NULLSF; |
| 1059 | } |
| 1060 | } |
| 1061 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1062 | inline int32_t ImmValue(int bits) const { |
| 1063 | DCHECK(InstructionType() == kImmediateType); |
| 1064 | return Bits(bits - 1, 0); |
| 1065 | } |
| 1066 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1067 | inline int32_t Imm16Value() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1068 | DCHECK(InstructionType() == kImmediateType); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1069 | return Bits(kImm16Shift + kImm16Bits - 1, kImm16Shift); |
| 1070 | } |
| 1071 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1072 | inline int32_t Imm18Value() const { |
| 1073 | DCHECK(InstructionType() == kImmediateType); |
| 1074 | return Bits(kImm18Shift + kImm18Bits - 1, kImm18Shift); |
| 1075 | } |
| 1076 | |
| 1077 | inline int32_t Imm19Value() const { |
| 1078 | DCHECK(InstructionType() == kImmediateType); |
| 1079 | return Bits(kImm19Shift + kImm19Bits - 1, kImm19Shift); |
| 1080 | } |
| 1081 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1082 | inline int32_t Imm21Value() const { |
| 1083 | DCHECK(InstructionType() == kImmediateType); |
| 1084 | return Bits(kImm21Shift + kImm21Bits - 1, kImm21Shift); |
| 1085 | } |
| 1086 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1087 | inline int32_t Imm26Value() const { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1088 | DCHECK((InstructionType() == kJumpType) || |
| 1089 | (InstructionType() == kImmediateType)); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1090 | return Bits(kImm26Shift + kImm26Bits - 1, kImm26Shift); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1091 | } |
| 1092 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1093 | static bool IsForbiddenAfterBranchInstr(Instr instr); |
| 1094 | |
| 1095 | // Say if the instruction should not be used in a branch delay slot or |
| 1096 | // immediately after a compact branch. |
| 1097 | inline bool IsForbiddenAfterBranch() const { |
| 1098 | return IsForbiddenAfterBranchInstr(InstructionBits()); |
| 1099 | } |
| 1100 | |
| 1101 | inline bool IsForbiddenInBranchDelay() const { |
| 1102 | return IsForbiddenAfterBranch(); |
| 1103 | } |
| 1104 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1105 | // Say if the instruction 'links'. e.g. jal, bal. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1106 | bool IsLinkingInstruction() const; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1107 | // Say if the instruction is a break or a trap. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1108 | bool IsTrap() const; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1109 | |
| 1110 | // Instructions are read of out a code stream. The only way to get a |
| 1111 | // reference to an instruction is to convert a pointer. There is no way |
| 1112 | // to allocate or create instances of class Instruction. |
| 1113 | // Use the At(pc) function to create references to Instruction. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1114 | static Instruction* At(byte* pc) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1115 | return reinterpret_cast<Instruction*>(pc); |
| 1116 | } |
| 1117 | |
| 1118 | private: |
| 1119 | // We need to prevent the creation of instances of class Instruction. |
| 1120 | DISALLOW_IMPLICIT_CONSTRUCTORS(Instruction); |
| 1121 | }; |
| 1122 | |
| 1123 | |
| 1124 | // ----------------------------------------------------------------------------- |
| 1125 | // MIPS assembly various constants. |
| 1126 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1127 | // C/C++ argument slots size. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1128 | const int kCArgSlotCount = 4; |
| 1129 | const int kCArgsSlotsSize = kCArgSlotCount * Instruction::kInstrSize; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1130 | const int kInvalidStackOffset = -1; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1131 | // JS argument slots size. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1132 | const int kJSArgsSlotsSize = 0 * Instruction::kInstrSize; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1133 | // Assembly builtins argument slots size. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1134 | const int kBArgsSlotsSize = 0 * Instruction::kInstrSize; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1135 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1136 | const int kBranchReturnOffset = 2 * Instruction::kInstrSize; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1137 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1138 | |
| 1139 | Instruction::Type Instruction::InstructionType(TypeChecks checks) const { |
| 1140 | if (checks == EXTRA) { |
| 1141 | if (OpcodeToBitNumber(OpcodeFieldRaw()) & kOpcodeImmediateTypeMask) { |
| 1142 | return kImmediateType; |
| 1143 | } |
| 1144 | } |
| 1145 | switch (OpcodeFieldRaw()) { |
| 1146 | case SPECIAL: |
| 1147 | if (checks == EXTRA) { |
| 1148 | if (FunctionFieldToBitNumber(FunctionFieldRaw()) & |
| 1149 | kFunctionFieldRegisterTypeMask) { |
| 1150 | return kRegisterType; |
| 1151 | } else { |
| 1152 | return kUnsupported; |
| 1153 | } |
| 1154 | } else { |
| 1155 | return kRegisterType; |
| 1156 | } |
| 1157 | break; |
| 1158 | case SPECIAL2: |
| 1159 | switch (FunctionFieldRaw()) { |
| 1160 | case MUL: |
| 1161 | case CLZ: |
| 1162 | return kRegisterType; |
| 1163 | default: |
| 1164 | return kUnsupported; |
| 1165 | } |
| 1166 | break; |
| 1167 | case SPECIAL3: |
| 1168 | switch (FunctionFieldRaw()) { |
| 1169 | case INS: |
| 1170 | case EXT: |
| 1171 | return kRegisterType; |
| 1172 | case BSHFL: { |
| 1173 | int sa = SaFieldRaw() >> kSaShift; |
| 1174 | switch (sa) { |
| 1175 | case BITSWAP: |
| 1176 | return kRegisterType; |
| 1177 | case WSBH: |
| 1178 | case SEB: |
| 1179 | case SEH: |
| 1180 | return kUnsupported; |
| 1181 | } |
| 1182 | sa >>= kBp2Bits; |
| 1183 | switch (sa) { |
| 1184 | case ALIGN: |
| 1185 | return kRegisterType; |
| 1186 | default: |
| 1187 | return kUnsupported; |
| 1188 | } |
| 1189 | } |
| 1190 | default: |
| 1191 | return kUnsupported; |
| 1192 | } |
| 1193 | break; |
| 1194 | case COP1: // Coprocessor instructions. |
| 1195 | switch (RsFieldRawNoAssert()) { |
| 1196 | case BC1: // Branch on coprocessor condition. |
| 1197 | case BC1EQZ: |
| 1198 | case BC1NEZ: |
| 1199 | return kImmediateType; |
| 1200 | default: |
| 1201 | return kRegisterType; |
| 1202 | } |
| 1203 | break; |
| 1204 | case COP1X: |
| 1205 | return kRegisterType; |
| 1206 | |
| 1207 | // 26 bits immediate type instructions. e.g.: j imm26. |
| 1208 | case J: |
| 1209 | case JAL: |
| 1210 | return kJumpType; |
| 1211 | |
| 1212 | default: |
| 1213 | if (checks == NORMAL) { |
| 1214 | return kImmediateType; |
| 1215 | } else { |
| 1216 | return kUnsupported; |
| 1217 | } |
| 1218 | } |
| 1219 | } |
| 1220 | |
| 1221 | #undef OpcodeToBitNumber |
| 1222 | #undef FunctionFieldToBitNumber |
| 1223 | } // namespace internal |
| 1224 | } // namespace v8 |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1225 | |
| 1226 | #endif // #ifndef V8_MIPS_CONSTANTS_H_ |