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) |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 67 | #if defined(_MIPS_ARCH_MIPS32R2) || defined(_MIPS_ARCH_MIPS32R6) |
| 68 | static const FpuMode kFpuMode = kFPXX; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 69 | #else |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 70 | #error "FPXX is supported only on Mips32R2 and Mips32R6" |
| 71 | #endif |
| 72 | #else |
| 73 | static const FpuMode kFpuMode = kFP32; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 74 | #endif |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 75 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 76 | #if(defined(__mips_hard_float) && __mips_hard_float != 0) |
| 77 | // Use floating-point coprocessor instructions. This flag is raised when |
| 78 | // -mhard-float is passed to the compiler. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 79 | const bool IsMipsSoftFloatABI = false; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 80 | #elif(defined(__mips_soft_float) && __mips_soft_float != 0) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 81 | // This flag is raised when -msoft-float is passed to the compiler. |
| 82 | // Although FPU is a base requirement for v8, soft-float ABI is used |
| 83 | // on soft-float systems with FPU kernel emulation. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 84 | const bool IsMipsSoftFloatABI = true; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 85 | #else |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 86 | const bool IsMipsSoftFloatABI = true; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 87 | #endif |
| 88 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 89 | #if defined(V8_TARGET_LITTLE_ENDIAN) |
| 90 | const uint32_t kHoleNanUpper32Offset = 4; |
| 91 | const uint32_t kHoleNanLower32Offset = 0; |
| 92 | #elif defined(V8_TARGET_BIG_ENDIAN) |
| 93 | const uint32_t kHoleNanUpper32Offset = 0; |
| 94 | const uint32_t kHoleNanLower32Offset = 4; |
| 95 | #else |
| 96 | #error Unknown endianness |
| 97 | #endif |
| 98 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 99 | #define IsFp64Mode() (kFpuMode == kFP64) |
| 100 | #define IsFp32Mode() (kFpuMode == kFP32) |
| 101 | #define IsFpxxMode() (kFpuMode == kFPXX) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 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 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 111 | #if defined(V8_TARGET_LITTLE_ENDIAN) |
| 112 | const uint32_t kMipsLwrOffset = 0; |
| 113 | const uint32_t kMipsLwlOffset = 3; |
| 114 | const uint32_t kMipsSwrOffset = 0; |
| 115 | const uint32_t kMipsSwlOffset = 3; |
| 116 | #elif defined(V8_TARGET_BIG_ENDIAN) |
| 117 | const uint32_t kMipsLwrOffset = 3; |
| 118 | const uint32_t kMipsLwlOffset = 0; |
| 119 | const uint32_t kMipsSwrOffset = 3; |
| 120 | const uint32_t kMipsSwlOffset = 0; |
| 121 | #else |
| 122 | #error Unknown endianness |
| 123 | #endif |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 124 | |
| 125 | #define __STDC_FORMAT_MACROS |
| 126 | #include <inttypes.h> |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 127 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 128 | // Defines constants and accessor classes to assemble, disassemble and |
| 129 | // simulate MIPS32 instructions. |
| 130 | // |
| 131 | // See: MIPS32 Architecture For Programmers |
| 132 | // Volume II: The MIPS32 Instruction Set |
| 133 | // Try www.cs.cornell.edu/courses/cs3410/2008fa/MIPS_Vol2.pdf. |
| 134 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 135 | namespace v8 { |
| 136 | namespace internal { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 137 | |
| 138 | // ----------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 139 | // Registers and FPURegisters. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 140 | |
| 141 | // Number of general purpose registers. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 142 | const int kNumRegisters = 32; |
| 143 | const int kInvalidRegister = -1; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 144 | |
| 145 | // Number of registers with HI, LO, and pc. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 146 | const int kNumSimuRegisters = 35; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 147 | |
| 148 | // In the simulator, the PC register is simulated as the 34th register. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 149 | const int kPCRegister = 34; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 150 | |
| 151 | // Number coprocessor registers. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 152 | const int kNumFPURegisters = 32; |
| 153 | const int kInvalidFPURegister = -1; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 154 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 155 | // FPU (coprocessor 1) control registers. Currently only FCSR is implemented. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 156 | const int kFCSRRegister = 31; |
| 157 | const int kInvalidFPUControlRegister = -1; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 158 | const uint32_t kFPUInvalidResult = static_cast<uint32_t>(1 << 31) - 1; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 159 | const int32_t kFPUInvalidResultNegative = static_cast<int32_t>(1 << 31); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 160 | const uint64_t kFPU64InvalidResult = |
| 161 | static_cast<uint64_t>(static_cast<uint64_t>(1) << 63) - 1; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 162 | const int64_t kFPU64InvalidResultNegative = |
| 163 | static_cast<int64_t>(static_cast<uint64_t>(1) << 63); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 164 | |
| 165 | // FCSR constants. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 166 | const uint32_t kFCSRInexactFlagBit = 2; |
| 167 | const uint32_t kFCSRUnderflowFlagBit = 3; |
| 168 | const uint32_t kFCSROverflowFlagBit = 4; |
| 169 | const uint32_t kFCSRDivideByZeroFlagBit = 5; |
| 170 | const uint32_t kFCSRInvalidOpFlagBit = 6; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 171 | const uint32_t kFCSRNaN2008FlagBit = 18; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 172 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 173 | const uint32_t kFCSRInexactFlagMask = 1 << kFCSRInexactFlagBit; |
| 174 | const uint32_t kFCSRUnderflowFlagMask = 1 << kFCSRUnderflowFlagBit; |
| 175 | const uint32_t kFCSROverflowFlagMask = 1 << kFCSROverflowFlagBit; |
| 176 | const uint32_t kFCSRDivideByZeroFlagMask = 1 << kFCSRDivideByZeroFlagBit; |
| 177 | const uint32_t kFCSRInvalidOpFlagMask = 1 << kFCSRInvalidOpFlagBit; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 178 | const uint32_t kFCSRNaN2008FlagMask = 1 << kFCSRNaN2008FlagBit; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 179 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 180 | const uint32_t kFCSRFlagMask = |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 181 | kFCSRInexactFlagMask | |
| 182 | kFCSRUnderflowFlagMask | |
| 183 | kFCSROverflowFlagMask | |
| 184 | kFCSRDivideByZeroFlagMask | |
| 185 | kFCSRInvalidOpFlagMask; |
| 186 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 187 | const uint32_t kFCSRExceptionFlagMask = kFCSRFlagMask ^ kFCSRInexactFlagMask; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 188 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 189 | // 'pref' instruction hints |
| 190 | const int32_t kPrefHintLoad = 0; |
| 191 | const int32_t kPrefHintStore = 1; |
| 192 | const int32_t kPrefHintLoadStreamed = 4; |
| 193 | const int32_t kPrefHintStoreStreamed = 5; |
| 194 | const int32_t kPrefHintLoadRetained = 6; |
| 195 | const int32_t kPrefHintStoreRetained = 7; |
| 196 | const int32_t kPrefHintWritebackInvalidate = 25; |
| 197 | const int32_t kPrefHintPrepareForStore = 30; |
| 198 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 199 | // Helper functions for converting between register numbers and names. |
| 200 | class Registers { |
| 201 | public: |
| 202 | // Return the name of the register. |
| 203 | static const char* Name(int reg); |
| 204 | |
| 205 | // Lookup the register number for the name provided. |
| 206 | static int Number(const char* name); |
| 207 | |
| 208 | struct RegisterAlias { |
| 209 | int reg; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 210 | const char* name; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 211 | }; |
| 212 | |
| 213 | static const int32_t kMaxValue = 0x7fffffff; |
| 214 | static const int32_t kMinValue = 0x80000000; |
| 215 | |
| 216 | private: |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 217 | static const char* names_[kNumSimuRegisters]; |
| 218 | static const RegisterAlias aliases_[]; |
| 219 | }; |
| 220 | |
| 221 | // Helper functions for converting between register numbers and names. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 222 | class FPURegisters { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 223 | public: |
| 224 | // Return the name of the register. |
| 225 | static const char* Name(int reg); |
| 226 | |
| 227 | // Lookup the register number for the name provided. |
| 228 | static int Number(const char* name); |
| 229 | |
| 230 | struct RegisterAlias { |
| 231 | int creg; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 232 | const char* name; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 233 | }; |
| 234 | |
| 235 | private: |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 236 | static const char* names_[kNumFPURegisters]; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 237 | static const RegisterAlias aliases_[]; |
| 238 | }; |
| 239 | |
| 240 | |
| 241 | // ----------------------------------------------------------------------------- |
| 242 | // Instructions encoding constants. |
| 243 | |
| 244 | // On MIPS all instructions are 32 bits. |
| 245 | typedef int32_t Instr; |
| 246 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 247 | // Special Software Interrupt codes when used in the presence of the MIPS |
| 248 | // simulator. |
| 249 | enum SoftwareInterruptCodes { |
| 250 | // Transition to C code. |
| 251 | call_rt_redirected = 0xfffff |
| 252 | }; |
| 253 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 254 | // On MIPS Simulator breakpoints can have different codes: |
| 255 | // - Breaks between 0 and kMaxWatchpointCode are treated as simple watchpoints, |
| 256 | // the simulator will run through them and print the registers. |
| 257 | // - Breaks between kMaxWatchpointCode and kMaxStopCode are treated as stop() |
| 258 | // instructions (see Assembler::stop()). |
| 259 | // - Breaks larger than kMaxStopCode are simple breaks, dropping you into the |
| 260 | // debugger. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 261 | const uint32_t kMaxWatchpointCode = 31; |
| 262 | const uint32_t kMaxStopCode = 127; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 263 | STATIC_ASSERT(kMaxWatchpointCode < kMaxStopCode); |
| 264 | |
| 265 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 266 | // ----- Fields offset and length. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 267 | const int kOpcodeShift = 26; |
| 268 | const int kOpcodeBits = 6; |
| 269 | const int kRsShift = 21; |
| 270 | const int kRsBits = 5; |
| 271 | const int kRtShift = 16; |
| 272 | const int kRtBits = 5; |
| 273 | const int kRdShift = 11; |
| 274 | const int kRdBits = 5; |
| 275 | const int kSaShift = 6; |
| 276 | const int kSaBits = 5; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 277 | const int kLsaSaBits = 2; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 278 | const int kFunctionShift = 0; |
| 279 | const int kFunctionBits = 6; |
| 280 | const int kLuiShift = 16; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 281 | const int kBp2Shift = 6; |
| 282 | const int kBp2Bits = 2; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 283 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 284 | const int kImm16Shift = 0; |
| 285 | const int kImm16Bits = 16; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 286 | const int kImm18Shift = 0; |
| 287 | const int kImm18Bits = 18; |
| 288 | const int kImm19Shift = 0; |
| 289 | const int kImm19Bits = 19; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 290 | const int kImm21Shift = 0; |
| 291 | const int kImm21Bits = 21; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 292 | const int kImm26Shift = 0; |
| 293 | const int kImm26Bits = 26; |
| 294 | const int kImm28Shift = 0; |
| 295 | const int kImm28Bits = 28; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 296 | const int kImm32Shift = 0; |
| 297 | const int kImm32Bits = 32; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 298 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 299 | // In branches and jumps immediate fields point to words, not bytes, |
| 300 | // and are therefore shifted by 2. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 301 | const int kImmFieldShift = 2; |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 302 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 303 | const int kFrBits = 5; |
| 304 | const int kFrShift = 21; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 305 | const int kFsShift = 11; |
| 306 | const int kFsBits = 5; |
| 307 | const int kFtShift = 16; |
| 308 | const int kFtBits = 5; |
| 309 | const int kFdShift = 6; |
| 310 | const int kFdBits = 5; |
| 311 | const int kFCccShift = 8; |
| 312 | const int kFCccBits = 3; |
| 313 | const int kFBccShift = 18; |
| 314 | const int kFBccBits = 3; |
| 315 | const int kFBtrueShift = 16; |
| 316 | const int kFBtrueBits = 1; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 317 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 318 | // ----- Miscellaneous useful masks. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 319 | // Instruction bit masks. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 320 | const int kOpcodeMask = ((1 << kOpcodeBits) - 1) << kOpcodeShift; |
| 321 | const int kImm16Mask = ((1 << kImm16Bits) - 1) << kImm16Shift; |
| 322 | const int kImm18Mask = ((1 << kImm18Bits) - 1) << kImm18Shift; |
| 323 | const int kImm19Mask = ((1 << kImm19Bits) - 1) << kImm19Shift; |
| 324 | const int kImm21Mask = ((1 << kImm21Bits) - 1) << kImm21Shift; |
| 325 | const int kImm26Mask = ((1 << kImm26Bits) - 1) << kImm26Shift; |
| 326 | const int kImm28Mask = ((1 << kImm28Bits) - 1) << kImm28Shift; |
| 327 | const int kRsFieldMask = ((1 << kRsBits) - 1) << kRsShift; |
| 328 | const int kRtFieldMask = ((1 << kRtBits) - 1) << kRtShift; |
| 329 | const int kRdFieldMask = ((1 << kRdBits) - 1) << kRdShift; |
| 330 | const int kSaFieldMask = ((1 << kSaBits) - 1) << kSaShift; |
| 331 | const int kFunctionFieldMask = ((1 << kFunctionBits) - 1) << kFunctionShift; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 332 | // Misc masks. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 333 | const int kHiMask = 0xffff << 16; |
| 334 | const int kLoMask = 0xffff; |
| 335 | const int kSignMask = 0x80000000; |
| 336 | const int kJumpAddrMask = (1 << (kImm26Bits + kImmFieldShift)) - 1; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 337 | |
| 338 | // ----- MIPS Opcodes and Function Fields. |
| 339 | // We use this presentation to stay close to the table representation in |
| 340 | // MIPS32 Architecture For Programmers, Volume II: The MIPS32 Instruction Set. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 341 | enum Opcode : uint32_t { |
| 342 | SPECIAL = 0U << kOpcodeShift, |
| 343 | REGIMM = 1U << kOpcodeShift, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 344 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 345 | J = ((0U << 3) + 2) << kOpcodeShift, |
| 346 | JAL = ((0U << 3) + 3) << kOpcodeShift, |
| 347 | BEQ = ((0U << 3) + 4) << kOpcodeShift, |
| 348 | BNE = ((0U << 3) + 5) << kOpcodeShift, |
| 349 | BLEZ = ((0U << 3) + 6) << kOpcodeShift, |
| 350 | BGTZ = ((0U << 3) + 7) << kOpcodeShift, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 351 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 352 | ADDI = ((1U << 3) + 0) << kOpcodeShift, |
| 353 | ADDIU = ((1U << 3) + 1) << kOpcodeShift, |
| 354 | SLTI = ((1U << 3) + 2) << kOpcodeShift, |
| 355 | SLTIU = ((1U << 3) + 3) << kOpcodeShift, |
| 356 | ANDI = ((1U << 3) + 4) << kOpcodeShift, |
| 357 | ORI = ((1U << 3) + 5) << kOpcodeShift, |
| 358 | XORI = ((1U << 3) + 6) << kOpcodeShift, |
| 359 | LUI = ((1U << 3) + 7) << kOpcodeShift, // LUI/AUI family. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 360 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 361 | BEQC = ((2U << 3) + 0) << kOpcodeShift, |
| 362 | COP1 = ((2U << 3) + 1) << kOpcodeShift, // Coprocessor 1 class. |
| 363 | BEQL = ((2U << 3) + 4) << kOpcodeShift, |
| 364 | BNEL = ((2U << 3) + 5) << kOpcodeShift, |
| 365 | BLEZL = ((2U << 3) + 6) << kOpcodeShift, |
| 366 | BGTZL = ((2U << 3) + 7) << kOpcodeShift, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 367 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 368 | DADDI = ((3U << 3) + 0) << kOpcodeShift, // This is also BNEC. |
| 369 | SPECIAL2 = ((3U << 3) + 4) << kOpcodeShift, |
| 370 | SPECIAL3 = ((3U << 3) + 7) << 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 | LB = ((4U << 3) + 0) << kOpcodeShift, |
| 373 | LH = ((4U << 3) + 1) << kOpcodeShift, |
| 374 | LWL = ((4U << 3) + 2) << kOpcodeShift, |
| 375 | LW = ((4U << 3) + 3) << kOpcodeShift, |
| 376 | LBU = ((4U << 3) + 4) << kOpcodeShift, |
| 377 | LHU = ((4U << 3) + 5) << kOpcodeShift, |
| 378 | LWR = ((4U << 3) + 6) << kOpcodeShift, |
| 379 | SB = ((5U << 3) + 0) << kOpcodeShift, |
| 380 | SH = ((5U << 3) + 1) << kOpcodeShift, |
| 381 | SWL = ((5U << 3) + 2) << kOpcodeShift, |
| 382 | SW = ((5U << 3) + 3) << kOpcodeShift, |
| 383 | SWR = ((5U << 3) + 6) << kOpcodeShift, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 384 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 385 | LWC1 = ((6U << 3) + 1) << kOpcodeShift, |
| 386 | BC = ((6U << 3) + 2) << kOpcodeShift, |
| 387 | LDC1 = ((6U << 3) + 5) << kOpcodeShift, |
| 388 | POP66 = ((6U << 3) + 6) << kOpcodeShift, // beqzc, jic |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 389 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 390 | PREF = ((6U << 3) + 3) << kOpcodeShift, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 391 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 392 | SWC1 = ((7U << 3) + 1) << kOpcodeShift, |
| 393 | BALC = ((7U << 3) + 2) << kOpcodeShift, |
| 394 | PCREL = ((7U << 3) + 3) << kOpcodeShift, |
| 395 | SDC1 = ((7U << 3) + 5) << kOpcodeShift, |
| 396 | POP76 = ((7U << 3) + 6) << kOpcodeShift, // bnezc, jialc |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 397 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 398 | COP1X = ((1U << 4) + 3) << kOpcodeShift, |
| 399 | |
| 400 | // New r6 instruction. |
| 401 | POP06 = BLEZ, // bgeuc/bleuc, blezalc, bgezalc |
| 402 | POP07 = BGTZ, // bltuc/bgtuc, bgtzalc, bltzalc |
| 403 | POP10 = ADDI, // beqzalc, bovc, beqc |
| 404 | POP26 = BLEZL, // bgezc, blezc, bgec/blec |
| 405 | POP27 = BGTZL, // bgtzc, bltzc, bltc/bgtc |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 406 | POP30 = DADDI, // bnezalc, bnvc, bnec |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 407 | }; |
| 408 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 409 | enum SecondaryField : uint32_t { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 410 | // SPECIAL Encoding of Function Field. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 411 | SLL = ((0U << 3) + 0), |
| 412 | MOVCI = ((0U << 3) + 1), |
| 413 | SRL = ((0U << 3) + 2), |
| 414 | SRA = ((0U << 3) + 3), |
| 415 | SLLV = ((0U << 3) + 4), |
| 416 | LSA = ((0U << 3) + 5), |
| 417 | SRLV = ((0U << 3) + 6), |
| 418 | SRAV = ((0U << 3) + 7), |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 419 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 420 | JR = ((1U << 3) + 0), |
| 421 | JALR = ((1U << 3) + 1), |
| 422 | MOVZ = ((1U << 3) + 2), |
| 423 | MOVN = ((1U << 3) + 3), |
| 424 | BREAK = ((1U << 3) + 5), |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 425 | SYNC = ((1U << 3) + 7), |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 426 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 427 | MFHI = ((2U << 3) + 0), |
| 428 | CLZ_R6 = ((2U << 3) + 0), |
| 429 | CLO_R6 = ((2U << 3) + 1), |
| 430 | MFLO = ((2U << 3) + 2), |
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 | MULT = ((3U << 3) + 0), |
| 433 | MULTU = ((3U << 3) + 1), |
| 434 | DIV = ((3U << 3) + 2), |
| 435 | DIVU = ((3U << 3) + 3), |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 436 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 437 | ADD = ((4U << 3) + 0), |
| 438 | ADDU = ((4U << 3) + 1), |
| 439 | SUB = ((4U << 3) + 2), |
| 440 | SUBU = ((4U << 3) + 3), |
| 441 | AND = ((4U << 3) + 4), |
| 442 | OR = ((4U << 3) + 5), |
| 443 | XOR = ((4U << 3) + 6), |
| 444 | NOR = ((4U << 3) + 7), |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 445 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 446 | SLT = ((5U << 3) + 2), |
| 447 | SLTU = ((5U << 3) + 3), |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 448 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 449 | TGE = ((6U << 3) + 0), |
| 450 | TGEU = ((6U << 3) + 1), |
| 451 | TLT = ((6U << 3) + 2), |
| 452 | TLTU = ((6U << 3) + 3), |
| 453 | TEQ = ((6U << 3) + 4), |
| 454 | SELEQZ_S = ((6U << 3) + 5), |
| 455 | TNE = ((6U << 3) + 6), |
| 456 | SELNEZ_S = ((6U << 3) + 7), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 457 | |
| 458 | // Multiply integers in r6. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 459 | MUL_MUH = ((3U << 3) + 0), // MUL, MUH. |
| 460 | MUL_MUH_U = ((3U << 3) + 1), // MUL_U, MUH_U. |
| 461 | RINT = ((3U << 3) + 2), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 462 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 463 | MUL_OP = ((0U << 3) + 2), |
| 464 | MUH_OP = ((0U << 3) + 3), |
| 465 | DIV_OP = ((0U << 3) + 2), |
| 466 | MOD_OP = ((0U << 3) + 3), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 467 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 468 | DIV_MOD = ((3U << 3) + 2), |
| 469 | DIV_MOD_U = ((3U << 3) + 3), |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 470 | |
| 471 | // SPECIAL2 Encoding of Function Field. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 472 | MUL = ((0U << 3) + 2), |
| 473 | CLZ = ((4U << 3) + 0), |
| 474 | CLO = ((4U << 3) + 1), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 475 | |
| 476 | // SPECIAL3 Encoding of Function Field. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 477 | EXT = ((0U << 3) + 0), |
| 478 | INS = ((0U << 3) + 4), |
| 479 | BSHFL = ((4U << 3) + 0), |
| 480 | |
| 481 | // SPECIAL3 Encoding of sa Field. |
| 482 | BITSWAP = ((0U << 3) + 0), |
| 483 | ALIGN = ((0U << 3) + 2), |
| 484 | WSBH = ((0U << 3) + 2), |
| 485 | SEB = ((2U << 3) + 0), |
| 486 | SEH = ((3U << 3) + 0), |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 487 | |
| 488 | // REGIMM encoding of rt Field. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 489 | BLTZ = ((0U << 3) + 0) << 16, |
| 490 | BGEZ = ((0U << 3) + 1) << 16, |
| 491 | BLTZAL = ((2U << 3) + 0) << 16, |
| 492 | BGEZAL = ((2U << 3) + 1) << 16, |
| 493 | BGEZALL = ((2U << 3) + 3) << 16, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 494 | |
| 495 | // COP1 Encoding of rs Field. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 496 | MFC1 = ((0U << 3) + 0) << 21, |
| 497 | CFC1 = ((0U << 3) + 2) << 21, |
| 498 | MFHC1 = ((0U << 3) + 3) << 21, |
| 499 | MTC1 = ((0U << 3) + 4) << 21, |
| 500 | CTC1 = ((0U << 3) + 6) << 21, |
| 501 | MTHC1 = ((0U << 3) + 7) << 21, |
| 502 | BC1 = ((1U << 3) + 0) << 21, |
| 503 | S = ((2U << 3) + 0) << 21, |
| 504 | D = ((2U << 3) + 1) << 21, |
| 505 | W = ((2U << 3) + 4) << 21, |
| 506 | L = ((2U << 3) + 5) << 21, |
| 507 | PS = ((2U << 3) + 6) << 21, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 508 | // COP1 Encoding of Function Field When rs=S. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 509 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 510 | ADD_S = ((0U << 3) + 0), |
| 511 | SUB_S = ((0U << 3) + 1), |
| 512 | MUL_S = ((0U << 3) + 2), |
| 513 | DIV_S = ((0U << 3) + 3), |
| 514 | ABS_S = ((0U << 3) + 5), |
| 515 | SQRT_S = ((0U << 3) + 4), |
| 516 | MOV_S = ((0U << 3) + 6), |
| 517 | NEG_S = ((0U << 3) + 7), |
| 518 | ROUND_L_S = ((1U << 3) + 0), |
| 519 | TRUNC_L_S = ((1U << 3) + 1), |
| 520 | CEIL_L_S = ((1U << 3) + 2), |
| 521 | FLOOR_L_S = ((1U << 3) + 3), |
| 522 | ROUND_W_S = ((1U << 3) + 4), |
| 523 | TRUNC_W_S = ((1U << 3) + 5), |
| 524 | CEIL_W_S = ((1U << 3) + 6), |
| 525 | FLOOR_W_S = ((1U << 3) + 7), |
| 526 | RECIP_S = ((2U << 3) + 5), |
| 527 | RSQRT_S = ((2U << 3) + 6), |
| 528 | CLASS_S = ((3U << 3) + 3), |
| 529 | CVT_D_S = ((4U << 3) + 1), |
| 530 | CVT_W_S = ((4U << 3) + 4), |
| 531 | CVT_L_S = ((4U << 3) + 5), |
| 532 | CVT_PS_S = ((4U << 3) + 6), |
| 533 | |
| 534 | // COP1 Encoding of Function Field When rs=D. |
| 535 | ADD_D = ((0U << 3) + 0), |
| 536 | SUB_D = ((0U << 3) + 1), |
| 537 | MUL_D = ((0U << 3) + 2), |
| 538 | DIV_D = ((0U << 3) + 3), |
| 539 | SQRT_D = ((0U << 3) + 4), |
| 540 | ABS_D = ((0U << 3) + 5), |
| 541 | MOV_D = ((0U << 3) + 6), |
| 542 | NEG_D = ((0U << 3) + 7), |
| 543 | ROUND_L_D = ((1U << 3) + 0), |
| 544 | TRUNC_L_D = ((1U << 3) + 1), |
| 545 | CEIL_L_D = ((1U << 3) + 2), |
| 546 | FLOOR_L_D = ((1U << 3) + 3), |
| 547 | ROUND_W_D = ((1U << 3) + 4), |
| 548 | TRUNC_W_D = ((1U << 3) + 5), |
| 549 | CEIL_W_D = ((1U << 3) + 6), |
| 550 | FLOOR_W_D = ((1U << 3) + 7), |
| 551 | RECIP_D = ((2U << 3) + 5), |
| 552 | RSQRT_D = ((2U << 3) + 6), |
| 553 | CLASS_D = ((3U << 3) + 3), |
| 554 | MIN = ((3U << 3) + 4), |
| 555 | MINA = ((3U << 3) + 5), |
| 556 | MAX = ((3U << 3) + 6), |
| 557 | MAXA = ((3U << 3) + 7), |
| 558 | CVT_S_D = ((4U << 3) + 0), |
| 559 | CVT_W_D = ((4U << 3) + 4), |
| 560 | CVT_L_D = ((4U << 3) + 5), |
| 561 | C_F_D = ((6U << 3) + 0), |
| 562 | C_UN_D = ((6U << 3) + 1), |
| 563 | C_EQ_D = ((6U << 3) + 2), |
| 564 | C_UEQ_D = ((6U << 3) + 3), |
| 565 | C_OLT_D = ((6U << 3) + 4), |
| 566 | C_ULT_D = ((6U << 3) + 5), |
| 567 | C_OLE_D = ((6U << 3) + 6), |
| 568 | C_ULE_D = ((6U << 3) + 7), |
| 569 | |
| 570 | // COP1 Encoding of Function Field When rs=W or L. |
| 571 | CVT_S_W = ((4U << 3) + 0), |
| 572 | CVT_D_W = ((4U << 3) + 1), |
| 573 | CVT_S_L = ((4U << 3) + 0), |
| 574 | CVT_D_L = ((4U << 3) + 1), |
| 575 | BC1EQZ = ((2U << 2) + 1) << 21, |
| 576 | BC1NEZ = ((3U << 2) + 1) << 21, |
| 577 | // COP1 CMP positive predicates Bit 5..4 = 00. |
| 578 | CMP_AF = ((0U << 3) + 0), |
| 579 | CMP_UN = ((0U << 3) + 1), |
| 580 | CMP_EQ = ((0U << 3) + 2), |
| 581 | CMP_UEQ = ((0U << 3) + 3), |
| 582 | CMP_LT = ((0U << 3) + 4), |
| 583 | CMP_ULT = ((0U << 3) + 5), |
| 584 | CMP_LE = ((0U << 3) + 6), |
| 585 | CMP_ULE = ((0U << 3) + 7), |
| 586 | CMP_SAF = ((1U << 3) + 0), |
| 587 | CMP_SUN = ((1U << 3) + 1), |
| 588 | CMP_SEQ = ((1U << 3) + 2), |
| 589 | CMP_SUEQ = ((1U << 3) + 3), |
| 590 | CMP_SSLT = ((1U << 3) + 4), |
| 591 | CMP_SSULT = ((1U << 3) + 5), |
| 592 | CMP_SLE = ((1U << 3) + 6), |
| 593 | CMP_SULE = ((1U << 3) + 7), |
| 594 | // COP1 CMP negative predicates Bit 5..4 = 01. |
| 595 | CMP_AT = ((2U << 3) + 0), // Reserved, not implemented. |
| 596 | CMP_OR = ((2U << 3) + 1), |
| 597 | CMP_UNE = ((2U << 3) + 2), |
| 598 | CMP_NE = ((2U << 3) + 3), |
| 599 | CMP_UGE = ((2U << 3) + 4), // Reserved, not implemented. |
| 600 | CMP_OGE = ((2U << 3) + 5), // Reserved, not implemented. |
| 601 | CMP_UGT = ((2U << 3) + 6), // Reserved, not implemented. |
| 602 | CMP_OGT = ((2U << 3) + 7), // Reserved, not implemented. |
| 603 | CMP_SAT = ((3U << 3) + 0), // Reserved, not implemented. |
| 604 | CMP_SOR = ((3U << 3) + 1), |
| 605 | CMP_SUNE = ((3U << 3) + 2), |
| 606 | CMP_SNE = ((3U << 3) + 3), |
| 607 | CMP_SUGE = ((3U << 3) + 4), // Reserved, not implemented. |
| 608 | CMP_SOGE = ((3U << 3) + 5), // Reserved, not implemented. |
| 609 | CMP_SUGT = ((3U << 3) + 6), // Reserved, not implemented. |
| 610 | CMP_SOGT = ((3U << 3) + 7), // Reserved, not implemented. |
| 611 | |
| 612 | SEL = ((2U << 3) + 0), |
| 613 | MOVZ_C = ((2U << 3) + 2), |
| 614 | MOVN_C = ((2U << 3) + 3), |
| 615 | SELEQZ_C = ((2U << 3) + 4), // COP1 on FPR registers. |
| 616 | MOVF = ((2U << 3) + 1), // Function field for MOVT.fmt and MOVF.fmt |
| 617 | SELNEZ_C = ((2U << 3) + 7), // COP1 on FPR registers. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 618 | // COP1 Encoding of Function Field When rs=PS. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 619 | // COP1X Encoding of Function Field. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 620 | MADD_D = ((4U << 3) + 1), |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 621 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 622 | // PCREL Encoding of rt Field. |
| 623 | ADDIUPC = ((0U << 2) + 0), |
| 624 | LWPC = ((0U << 2) + 1), |
| 625 | AUIPC = ((3U << 3) + 6), |
| 626 | ALUIPC = ((3U << 3) + 7), |
| 627 | |
| 628 | // POP66 Encoding of rs Field. |
| 629 | JIC = ((0U << 5) + 0), |
| 630 | |
| 631 | // POP76 Encoding of rs Field. |
| 632 | JIALC = ((0U << 5) + 0), |
| 633 | |
| 634 | NULLSF = 0U |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 635 | }; |
| 636 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 637 | // ----- Emulated conditions. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 638 | // On MIPS we use this enum to abstract from conditional branch instructions. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 639 | // The 'U' prefix is used to specify unsigned comparisons. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 640 | // Opposite conditions must be paired as odd/even numbers |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 641 | // because 'NegateCondition' function flips LSB to negate condition. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 642 | enum Condition { |
| 643 | // Any value < 0 is considered no_condition. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 644 | kNoCondition = -1, |
| 645 | overflow = 0, |
| 646 | no_overflow = 1, |
| 647 | Uless = 2, |
| 648 | Ugreater_equal = 3, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 649 | Uless_equal = 4, |
| 650 | Ugreater = 5, |
| 651 | equal = 6, |
| 652 | not_equal = 7, // Unordered or Not Equal. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 653 | negative = 8, |
| 654 | positive = 9, |
| 655 | parity_even = 10, |
| 656 | parity_odd = 11, |
| 657 | less = 12, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 658 | greater_equal = 13, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 659 | less_equal = 14, |
| 660 | greater = 15, |
| 661 | ueq = 16, // Unordered or Equal. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 662 | ogl = 17, // Ordered and Not Equal. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 663 | cc_always = 18, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 664 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 665 | // Aliases. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 666 | carry = Uless, |
| 667 | not_carry = Ugreater_equal, |
| 668 | zero = equal, |
| 669 | eq = equal, |
| 670 | not_zero = not_equal, |
| 671 | ne = not_equal, |
| 672 | nz = not_equal, |
| 673 | sign = negative, |
| 674 | not_sign = positive, |
| 675 | mi = negative, |
| 676 | pl = positive, |
| 677 | hi = Ugreater, |
| 678 | ls = Uless_equal, |
| 679 | ge = greater_equal, |
| 680 | lt = less, |
| 681 | gt = greater, |
| 682 | le = less_equal, |
| 683 | hs = Ugreater_equal, |
| 684 | lo = Uless, |
| 685 | al = cc_always, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 686 | ult = Uless, |
| 687 | uge = Ugreater_equal, |
| 688 | ule = Uless_equal, |
| 689 | ugt = Ugreater, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 690 | cc_default = kNoCondition |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 691 | }; |
| 692 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 693 | |
| 694 | // Returns the equivalent of !cc. |
| 695 | // Negation of the default kNoCondition (-1) results in a non-default |
| 696 | // no_condition value (-2). As long as tests for no_condition check |
| 697 | // for condition < 0, this will work as expected. |
| 698 | inline Condition NegateCondition(Condition cc) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 699 | DCHECK(cc != cc_always); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 700 | return static_cast<Condition>(cc ^ 1); |
| 701 | } |
| 702 | |
| 703 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 704 | inline Condition NegateFpuCondition(Condition cc) { |
| 705 | DCHECK(cc != cc_always); |
| 706 | switch (cc) { |
| 707 | case ult: |
| 708 | return ge; |
| 709 | case ugt: |
| 710 | return le; |
| 711 | case uge: |
| 712 | return lt; |
| 713 | case ule: |
| 714 | return gt; |
| 715 | case lt: |
| 716 | return uge; |
| 717 | case gt: |
| 718 | return ule; |
| 719 | case ge: |
| 720 | return ult; |
| 721 | case le: |
| 722 | return ugt; |
| 723 | case eq: |
| 724 | return ne; |
| 725 | case ne: |
| 726 | return eq; |
| 727 | case ueq: |
| 728 | return ogl; |
| 729 | case ogl: |
| 730 | return ueq; |
| 731 | default: |
| 732 | return cc; |
| 733 | } |
| 734 | } |
| 735 | |
| 736 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 737 | // Commute a condition such that {a cond b == b cond' a}. |
| 738 | inline Condition CommuteCondition(Condition cc) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 739 | switch (cc) { |
| 740 | case Uless: |
| 741 | return Ugreater; |
| 742 | case Ugreater: |
| 743 | return Uless; |
| 744 | case Ugreater_equal: |
| 745 | return Uless_equal; |
| 746 | case Uless_equal: |
| 747 | return Ugreater_equal; |
| 748 | case less: |
| 749 | return greater; |
| 750 | case greater: |
| 751 | return less; |
| 752 | case greater_equal: |
| 753 | return less_equal; |
| 754 | case less_equal: |
| 755 | return greater_equal; |
| 756 | default: |
| 757 | return cc; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 758 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 759 | } |
| 760 | |
| 761 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 762 | // ----- Coprocessor conditions. |
| 763 | enum FPUCondition { |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 764 | kNoFPUCondition = -1, |
| 765 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 766 | F = 0x00, // False. |
| 767 | UN = 0x01, // Unordered. |
| 768 | EQ = 0x02, // Equal. |
| 769 | UEQ = 0x03, // Unordered or Equal. |
| 770 | OLT = 0x04, // Ordered or Less Than, on Mips release < 6. |
| 771 | LT = 0x04, // Ordered or Less Than, on Mips release >= 6. |
| 772 | ULT = 0x05, // Unordered or Less Than. |
| 773 | OLE = 0x06, // Ordered or Less Than or Equal, on Mips release < 6. |
| 774 | LE = 0x06, // Ordered or Less Than or Equal, on Mips release >= 6. |
| 775 | ULE = 0x07, // Unordered or Less Than or Equal. |
| 776 | |
| 777 | // Following constants are available on Mips release >= 6 only. |
| 778 | ORD = 0x11, // Ordered, on Mips release >= 6. |
| 779 | UNE = 0x12, // Not equal, on Mips release >= 6. |
| 780 | NE = 0x13, // Ordered Greater Than or Less Than. on Mips >= 6 only. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 781 | }; |
| 782 | |
| 783 | |
| 784 | // FPU rounding modes. |
| 785 | enum FPURoundingMode { |
| 786 | RN = 0 << 0, // Round to Nearest. |
| 787 | RZ = 1 << 0, // Round towards zero. |
| 788 | RP = 2 << 0, // Round towards Plus Infinity. |
| 789 | RM = 3 << 0, // Round towards Minus Infinity. |
| 790 | |
| 791 | // Aliases. |
| 792 | kRoundToNearest = RN, |
| 793 | kRoundToZero = RZ, |
| 794 | kRoundToPlusInf = RP, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 795 | kRoundToMinusInf = RM, |
| 796 | |
| 797 | mode_round = RN, |
| 798 | mode_ceil = RP, |
| 799 | mode_floor = RM, |
| 800 | mode_trunc = RZ |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 801 | }; |
| 802 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 803 | const uint32_t kFPURoundingModeMask = 3 << 0; |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 804 | |
| 805 | enum CheckForInexactConversion { |
| 806 | kCheckForInexactConversion, |
| 807 | kDontCheckForInexactConversion |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 808 | }; |
| 809 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 810 | enum class MaxMinKind : int { kMin = 0, kMax = 1 }; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 811 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 812 | // ----------------------------------------------------------------------------- |
| 813 | // Hints. |
| 814 | |
| 815 | // Branch hints are not used on the MIPS. They are defined so that they can |
| 816 | // appear in shared function signatures, but will be ignored in MIPS |
| 817 | // implementations. |
| 818 | enum Hint { |
| 819 | no_hint = 0 |
| 820 | }; |
| 821 | |
| 822 | |
| 823 | inline Hint NegateHint(Hint hint) { |
| 824 | return no_hint; |
| 825 | } |
| 826 | |
| 827 | |
| 828 | // ----------------------------------------------------------------------------- |
| 829 | // Specific instructions, constants, and masks. |
| 830 | // These constants are declared in assembler-mips.cc, as they use named |
| 831 | // registers and other constants. |
| 832 | |
| 833 | // addiu(sp, sp, 4) aka Pop() operation or part of Pop(r) |
| 834 | // operations as post-increment of sp. |
| 835 | extern const Instr kPopInstruction; |
| 836 | // addiu(sp, sp, -4) part of Push(r) operation as pre-decrement of sp. |
| 837 | extern const Instr kPushInstruction; |
| 838 | // sw(r, MemOperand(sp, 0)) |
| 839 | extern const Instr kPushRegPattern; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 840 | // lw(r, MemOperand(sp, 0)) |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 841 | extern const Instr kPopRegPattern; |
| 842 | extern const Instr kLwRegFpOffsetPattern; |
| 843 | extern const Instr kSwRegFpOffsetPattern; |
| 844 | extern const Instr kLwRegFpNegOffsetPattern; |
| 845 | extern const Instr kSwRegFpNegOffsetPattern; |
| 846 | // A mask for the Rt register for push, pop, lw, sw instructions. |
| 847 | extern const Instr kRtMask; |
| 848 | extern const Instr kLwSwInstrTypeMask; |
| 849 | extern const Instr kLwSwInstrArgumentMask; |
| 850 | extern const Instr kLwSwOffsetMask; |
| 851 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 852 | // Break 0xfffff, reserved for redirected real time call. |
| 853 | const Instr rtCallRedirInstr = SPECIAL | BREAK | call_rt_redirected << 6; |
| 854 | // A nop instruction. (Encoding of sll 0 0 0). |
| 855 | const Instr nopInstr = 0; |
| 856 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 857 | static constexpr uint64_t OpcodeToBitNumber(Opcode opcode) { |
| 858 | return 1ULL << (static_cast<uint32_t>(opcode) >> kOpcodeShift); |
| 859 | } |
| 860 | |
| 861 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 862 | class Instruction { |
| 863 | public: |
| 864 | enum { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 865 | kInstrSize = 4, |
| 866 | kInstrSizeLog2 = 2, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 867 | // 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] | 868 | // always the value of the current instruction being executed. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 869 | kPCReadOffset = 0 |
| 870 | }; |
| 871 | |
| 872 | // Get the raw instruction bits. |
| 873 | inline Instr InstructionBits() const { |
| 874 | return *reinterpret_cast<const Instr*>(this); |
| 875 | } |
| 876 | |
| 877 | // Set the raw instruction bits to value. |
| 878 | inline void SetInstructionBits(Instr value) { |
| 879 | *reinterpret_cast<Instr*>(this) = value; |
| 880 | } |
| 881 | |
| 882 | // Read one particular bit out of the instruction bits. |
| 883 | inline int Bit(int nr) const { |
| 884 | return (InstructionBits() >> nr) & 1; |
| 885 | } |
| 886 | |
| 887 | // Read a bit field out of the instruction bits. |
| 888 | inline int Bits(int hi, int lo) const { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 889 | return (InstructionBits() >> lo) & ((2U << (hi - lo)) - 1); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 890 | } |
| 891 | |
| 892 | // Instruction type. |
| 893 | enum Type { |
| 894 | kRegisterType, |
| 895 | kImmediateType, |
| 896 | kJumpType, |
| 897 | kUnsupported = -1 |
| 898 | }; |
| 899 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 900 | enum TypeChecks { NORMAL, EXTRA }; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 901 | |
| 902 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 903 | static constexpr uint64_t kOpcodeImmediateTypeMask = |
| 904 | OpcodeToBitNumber(REGIMM) | OpcodeToBitNumber(BEQ) | |
| 905 | OpcodeToBitNumber(BNE) | OpcodeToBitNumber(BLEZ) | |
| 906 | OpcodeToBitNumber(BGTZ) | OpcodeToBitNumber(ADDI) | |
| 907 | OpcodeToBitNumber(DADDI) | OpcodeToBitNumber(ADDIU) | |
| 908 | OpcodeToBitNumber(SLTI) | OpcodeToBitNumber(SLTIU) | |
| 909 | OpcodeToBitNumber(ANDI) | OpcodeToBitNumber(ORI) | |
| 910 | OpcodeToBitNumber(XORI) | OpcodeToBitNumber(LUI) | |
| 911 | OpcodeToBitNumber(BEQL) | OpcodeToBitNumber(BNEL) | |
| 912 | OpcodeToBitNumber(BLEZL) | OpcodeToBitNumber(BGTZL) | |
| 913 | OpcodeToBitNumber(POP66) | OpcodeToBitNumber(POP76) | |
| 914 | OpcodeToBitNumber(LB) | OpcodeToBitNumber(LH) | OpcodeToBitNumber(LWL) | |
| 915 | OpcodeToBitNumber(LW) | OpcodeToBitNumber(LBU) | OpcodeToBitNumber(LHU) | |
| 916 | OpcodeToBitNumber(LWR) | OpcodeToBitNumber(SB) | OpcodeToBitNumber(SH) | |
| 917 | OpcodeToBitNumber(SWL) | OpcodeToBitNumber(SW) | OpcodeToBitNumber(SWR) | |
| 918 | OpcodeToBitNumber(LWC1) | OpcodeToBitNumber(LDC1) | |
| 919 | OpcodeToBitNumber(SWC1) | OpcodeToBitNumber(SDC1) | |
| 920 | OpcodeToBitNumber(PCREL) | OpcodeToBitNumber(BC) | |
| 921 | OpcodeToBitNumber(BALC); |
| 922 | |
| 923 | #define FunctionFieldToBitNumber(function) (1ULL << function) |
| 924 | |
| 925 | static const uint64_t kFunctionFieldRegisterTypeMask = |
| 926 | FunctionFieldToBitNumber(JR) | FunctionFieldToBitNumber(JALR) | |
| 927 | FunctionFieldToBitNumber(BREAK) | FunctionFieldToBitNumber(SLL) | |
| 928 | FunctionFieldToBitNumber(SRL) | FunctionFieldToBitNumber(SRA) | |
| 929 | FunctionFieldToBitNumber(SLLV) | FunctionFieldToBitNumber(SRLV) | |
| 930 | FunctionFieldToBitNumber(SRAV) | FunctionFieldToBitNumber(LSA) | |
| 931 | FunctionFieldToBitNumber(MFHI) | FunctionFieldToBitNumber(MFLO) | |
| 932 | FunctionFieldToBitNumber(MULT) | FunctionFieldToBitNumber(MULTU) | |
| 933 | FunctionFieldToBitNumber(DIV) | FunctionFieldToBitNumber(DIVU) | |
| 934 | FunctionFieldToBitNumber(ADD) | FunctionFieldToBitNumber(ADDU) | |
| 935 | FunctionFieldToBitNumber(SUB) | FunctionFieldToBitNumber(SUBU) | |
| 936 | FunctionFieldToBitNumber(AND) | FunctionFieldToBitNumber(OR) | |
| 937 | FunctionFieldToBitNumber(XOR) | FunctionFieldToBitNumber(NOR) | |
| 938 | FunctionFieldToBitNumber(SLT) | FunctionFieldToBitNumber(SLTU) | |
| 939 | FunctionFieldToBitNumber(TGE) | FunctionFieldToBitNumber(TGEU) | |
| 940 | FunctionFieldToBitNumber(TLT) | FunctionFieldToBitNumber(TLTU) | |
| 941 | FunctionFieldToBitNumber(TEQ) | FunctionFieldToBitNumber(TNE) | |
| 942 | FunctionFieldToBitNumber(MOVZ) | FunctionFieldToBitNumber(MOVN) | |
| 943 | FunctionFieldToBitNumber(MOVCI) | FunctionFieldToBitNumber(SELEQZ_S) | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 944 | FunctionFieldToBitNumber(SELNEZ_S) | FunctionFieldToBitNumber(SYNC); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 945 | |
| 946 | // Get the encoding type of the instruction. |
| 947 | inline Type InstructionType(TypeChecks checks = NORMAL) const; |
| 948 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 949 | // Accessors for the different named fields used in the MIPS encoding. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 950 | inline Opcode OpcodeValue() const { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 951 | return static_cast<Opcode>( |
| 952 | Bits(kOpcodeShift + kOpcodeBits - 1, kOpcodeShift)); |
| 953 | } |
| 954 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 955 | inline int RsValue() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 956 | DCHECK(InstructionType() == kRegisterType || |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 957 | InstructionType() == kImmediateType); |
| 958 | return Bits(kRsShift + kRsBits - 1, kRsShift); |
| 959 | } |
| 960 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 961 | inline int RtValue() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 962 | DCHECK(InstructionType() == kRegisterType || |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 963 | InstructionType() == kImmediateType); |
| 964 | return Bits(kRtShift + kRtBits - 1, kRtShift); |
| 965 | } |
| 966 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 967 | inline int RdValue() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 968 | DCHECK(InstructionType() == kRegisterType); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 969 | return Bits(kRdShift + kRdBits - 1, kRdShift); |
| 970 | } |
| 971 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 972 | inline int SaValue() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 973 | DCHECK(InstructionType() == kRegisterType); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 974 | return Bits(kSaShift + kSaBits - 1, kSaShift); |
| 975 | } |
| 976 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 977 | inline int LsaSaValue() const { |
| 978 | DCHECK(InstructionType() == kRegisterType); |
| 979 | return Bits(kSaShift + kLsaSaBits - 1, kSaShift); |
| 980 | } |
| 981 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 982 | inline int FunctionValue() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 983 | DCHECK(InstructionType() == kRegisterType || |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 984 | InstructionType() == kImmediateType); |
| 985 | return Bits(kFunctionShift + kFunctionBits - 1, kFunctionShift); |
| 986 | } |
| 987 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 988 | inline int FdValue() const { |
| 989 | return Bits(kFdShift + kFdBits - 1, kFdShift); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 990 | } |
| 991 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 992 | inline int FsValue() const { |
| 993 | return Bits(kFsShift + kFsBits - 1, kFsShift); |
| 994 | } |
| 995 | |
| 996 | inline int FtValue() const { |
| 997 | return Bits(kFtShift + kFtBits - 1, kFtShift); |
| 998 | } |
| 999 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1000 | inline int FrValue() const { |
| 1001 | return Bits(kFrShift + kFrBits -1, kFrShift); |
| 1002 | } |
| 1003 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1004 | inline int Bp2Value() const { |
| 1005 | DCHECK(InstructionType() == kRegisterType); |
| 1006 | return Bits(kBp2Shift + kBp2Bits - 1, kBp2Shift); |
| 1007 | } |
| 1008 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1009 | // Float Compare condition code instruction bits. |
| 1010 | inline int FCccValue() const { |
| 1011 | return Bits(kFCccShift + kFCccBits - 1, kFCccShift); |
| 1012 | } |
| 1013 | |
| 1014 | // Float Branch condition code instruction bits. |
| 1015 | inline int FBccValue() const { |
| 1016 | return Bits(kFBccShift + kFBccBits - 1, kFBccShift); |
| 1017 | } |
| 1018 | |
| 1019 | // Float Branch true/false instruction bit. |
| 1020 | inline int FBtrueValue() const { |
| 1021 | return Bits(kFBtrueShift + kFBtrueBits - 1, kFBtrueShift); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1022 | } |
| 1023 | |
| 1024 | // Return the fields at their original place in the instruction encoding. |
| 1025 | inline Opcode OpcodeFieldRaw() const { |
| 1026 | return static_cast<Opcode>(InstructionBits() & kOpcodeMask); |
| 1027 | } |
| 1028 | |
| 1029 | inline int RsFieldRaw() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1030 | DCHECK(InstructionType() == kRegisterType || |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1031 | InstructionType() == kImmediateType); |
| 1032 | return InstructionBits() & kRsFieldMask; |
| 1033 | } |
| 1034 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1035 | // Same as above function, but safe to call within InstructionType(). |
| 1036 | inline int RsFieldRawNoAssert() const { |
| 1037 | return InstructionBits() & kRsFieldMask; |
| 1038 | } |
| 1039 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1040 | inline int RtFieldRaw() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1041 | DCHECK(InstructionType() == kRegisterType || |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1042 | InstructionType() == kImmediateType); |
| 1043 | return InstructionBits() & kRtFieldMask; |
| 1044 | } |
| 1045 | |
| 1046 | inline int RdFieldRaw() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1047 | DCHECK(InstructionType() == kRegisterType); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1048 | return InstructionBits() & kRdFieldMask; |
| 1049 | } |
| 1050 | |
| 1051 | inline int SaFieldRaw() const { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1052 | return InstructionBits() & kSaFieldMask; |
| 1053 | } |
| 1054 | |
| 1055 | inline int FunctionFieldRaw() const { |
| 1056 | return InstructionBits() & kFunctionFieldMask; |
| 1057 | } |
| 1058 | |
| 1059 | // Get the secondary field according to the opcode. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1060 | inline int SecondaryValue() const { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1061 | Opcode op = OpcodeFieldRaw(); |
| 1062 | switch (op) { |
| 1063 | case SPECIAL: |
| 1064 | case SPECIAL2: |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1065 | return FunctionValue(); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1066 | case COP1: |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1067 | return RsValue(); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1068 | case REGIMM: |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1069 | return RtValue(); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1070 | default: |
| 1071 | return NULLSF; |
| 1072 | } |
| 1073 | } |
| 1074 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1075 | inline int32_t ImmValue(int bits) const { |
| 1076 | DCHECK(InstructionType() == kImmediateType); |
| 1077 | return Bits(bits - 1, 0); |
| 1078 | } |
| 1079 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1080 | inline int32_t Imm16Value() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1081 | DCHECK(InstructionType() == kImmediateType); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1082 | return Bits(kImm16Shift + kImm16Bits - 1, kImm16Shift); |
| 1083 | } |
| 1084 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1085 | inline int32_t Imm18Value() const { |
| 1086 | DCHECK(InstructionType() == kImmediateType); |
| 1087 | return Bits(kImm18Shift + kImm18Bits - 1, kImm18Shift); |
| 1088 | } |
| 1089 | |
| 1090 | inline int32_t Imm19Value() const { |
| 1091 | DCHECK(InstructionType() == kImmediateType); |
| 1092 | return Bits(kImm19Shift + kImm19Bits - 1, kImm19Shift); |
| 1093 | } |
| 1094 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1095 | inline int32_t Imm21Value() const { |
| 1096 | DCHECK(InstructionType() == kImmediateType); |
| 1097 | return Bits(kImm21Shift + kImm21Bits - 1, kImm21Shift); |
| 1098 | } |
| 1099 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1100 | inline int32_t Imm26Value() const { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1101 | DCHECK((InstructionType() == kJumpType) || |
| 1102 | (InstructionType() == kImmediateType)); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1103 | return Bits(kImm26Shift + kImm26Bits - 1, kImm26Shift); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1104 | } |
| 1105 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1106 | static bool IsForbiddenAfterBranchInstr(Instr instr); |
| 1107 | |
| 1108 | // Say if the instruction should not be used in a branch delay slot or |
| 1109 | // immediately after a compact branch. |
| 1110 | inline bool IsForbiddenAfterBranch() const { |
| 1111 | return IsForbiddenAfterBranchInstr(InstructionBits()); |
| 1112 | } |
| 1113 | |
| 1114 | inline bool IsForbiddenInBranchDelay() const { |
| 1115 | return IsForbiddenAfterBranch(); |
| 1116 | } |
| 1117 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1118 | // Say if the instruction 'links'. e.g. jal, bal. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1119 | bool IsLinkingInstruction() const; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1120 | // Say if the instruction is a break or a trap. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1121 | bool IsTrap() const; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1122 | |
| 1123 | // Instructions are read of out a code stream. The only way to get a |
| 1124 | // reference to an instruction is to convert a pointer. There is no way |
| 1125 | // to allocate or create instances of class Instruction. |
| 1126 | // Use the At(pc) function to create references to Instruction. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1127 | static Instruction* At(byte* pc) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1128 | return reinterpret_cast<Instruction*>(pc); |
| 1129 | } |
| 1130 | |
| 1131 | private: |
| 1132 | // We need to prevent the creation of instances of class Instruction. |
| 1133 | DISALLOW_IMPLICIT_CONSTRUCTORS(Instruction); |
| 1134 | }; |
| 1135 | |
| 1136 | |
| 1137 | // ----------------------------------------------------------------------------- |
| 1138 | // MIPS assembly various constants. |
| 1139 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1140 | // C/C++ argument slots size. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1141 | const int kCArgSlotCount = 4; |
| 1142 | const int kCArgsSlotsSize = kCArgSlotCount * Instruction::kInstrSize; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1143 | const int kInvalidStackOffset = -1; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1144 | // JS argument slots size. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1145 | const int kJSArgsSlotsSize = 0 * Instruction::kInstrSize; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1146 | // Assembly builtins argument slots size. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1147 | const int kBArgsSlotsSize = 0 * Instruction::kInstrSize; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1148 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1149 | const int kBranchReturnOffset = 2 * Instruction::kInstrSize; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1150 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1151 | |
| 1152 | Instruction::Type Instruction::InstructionType(TypeChecks checks) const { |
| 1153 | if (checks == EXTRA) { |
| 1154 | if (OpcodeToBitNumber(OpcodeFieldRaw()) & kOpcodeImmediateTypeMask) { |
| 1155 | return kImmediateType; |
| 1156 | } |
| 1157 | } |
| 1158 | switch (OpcodeFieldRaw()) { |
| 1159 | case SPECIAL: |
| 1160 | if (checks == EXTRA) { |
| 1161 | if (FunctionFieldToBitNumber(FunctionFieldRaw()) & |
| 1162 | kFunctionFieldRegisterTypeMask) { |
| 1163 | return kRegisterType; |
| 1164 | } else { |
| 1165 | return kUnsupported; |
| 1166 | } |
| 1167 | } else { |
| 1168 | return kRegisterType; |
| 1169 | } |
| 1170 | break; |
| 1171 | case SPECIAL2: |
| 1172 | switch (FunctionFieldRaw()) { |
| 1173 | case MUL: |
| 1174 | case CLZ: |
| 1175 | return kRegisterType; |
| 1176 | default: |
| 1177 | return kUnsupported; |
| 1178 | } |
| 1179 | break; |
| 1180 | case SPECIAL3: |
| 1181 | switch (FunctionFieldRaw()) { |
| 1182 | case INS: |
| 1183 | case EXT: |
| 1184 | return kRegisterType; |
| 1185 | case BSHFL: { |
| 1186 | int sa = SaFieldRaw() >> kSaShift; |
| 1187 | switch (sa) { |
| 1188 | case BITSWAP: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1189 | case WSBH: |
| 1190 | case SEB: |
| 1191 | case SEH: |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1192 | return kRegisterType; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1193 | } |
| 1194 | sa >>= kBp2Bits; |
| 1195 | switch (sa) { |
| 1196 | case ALIGN: |
| 1197 | return kRegisterType; |
| 1198 | default: |
| 1199 | return kUnsupported; |
| 1200 | } |
| 1201 | } |
| 1202 | default: |
| 1203 | return kUnsupported; |
| 1204 | } |
| 1205 | break; |
| 1206 | case COP1: // Coprocessor instructions. |
| 1207 | switch (RsFieldRawNoAssert()) { |
| 1208 | case BC1: // Branch on coprocessor condition. |
| 1209 | case BC1EQZ: |
| 1210 | case BC1NEZ: |
| 1211 | return kImmediateType; |
| 1212 | default: |
| 1213 | return kRegisterType; |
| 1214 | } |
| 1215 | break; |
| 1216 | case COP1X: |
| 1217 | return kRegisterType; |
| 1218 | |
| 1219 | // 26 bits immediate type instructions. e.g.: j imm26. |
| 1220 | case J: |
| 1221 | case JAL: |
| 1222 | return kJumpType; |
| 1223 | |
| 1224 | default: |
| 1225 | if (checks == NORMAL) { |
| 1226 | return kImmediateType; |
| 1227 | } else { |
| 1228 | return kUnsupported; |
| 1229 | } |
| 1230 | } |
| 1231 | } |
| 1232 | |
| 1233 | #undef OpcodeToBitNumber |
| 1234 | #undef FunctionFieldToBitNumber |
| 1235 | } // namespace internal |
| 1236 | } // namespace v8 |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1237 | |
| 1238 | #endif // #ifndef V8_MIPS_CONSTANTS_H_ |