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 | // A Disassembler object is used to disassemble a block of code instruction by |
| 6 | // instruction. The default implementation of the NameConverter object can be |
| 7 | // overriden to modify register names or to do symbol lookup on addresses. |
| 8 | // |
| 9 | // The example below will disassemble a block of code and print it to stdout. |
| 10 | // |
| 11 | // NameConverter converter; |
| 12 | // Disassembler d(converter); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 13 | // for (byte* pc = begin; pc < end;) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 14 | // v8::internal::EmbeddedVector<char, 256> buffer; |
| 15 | // byte* prev_pc = pc; |
| 16 | // pc += d.InstructionDecode(buffer, pc); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 17 | // printf("%p %08x %s\n", |
| 18 | // prev_pc, *reinterpret_cast<int32_t*>(prev_pc), buffer); |
| 19 | // } |
| 20 | // |
| 21 | // The Disassembler class also has a convenience method to disassemble a block |
| 22 | // of code into a FILE*, meaning that the above functionality could also be |
| 23 | // achieved by just calling Disassembler::Disassemble(stdout, begin, end); |
| 24 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 25 | #include <assert.h> |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 26 | #include <stdarg.h> |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 27 | #include <stdio.h> |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 28 | #include <string.h> |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 29 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 30 | #if V8_TARGET_ARCH_MIPS |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 31 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 32 | #include "src/base/platform/platform.h" |
| 33 | #include "src/disasm.h" |
| 34 | #include "src/macro-assembler.h" |
| 35 | #include "src/mips/constants-mips.h" |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 36 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 37 | namespace v8 { |
| 38 | namespace internal { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 39 | |
| 40 | //------------------------------------------------------------------------------ |
| 41 | |
| 42 | // Decoder decodes and disassembles instructions into an output buffer. |
| 43 | // It uses the converter to convert register names and call destinations into |
| 44 | // more informative description. |
| 45 | class Decoder { |
| 46 | public: |
| 47 | Decoder(const disasm::NameConverter& converter, |
| 48 | v8::internal::Vector<char> out_buffer) |
| 49 | : converter_(converter), |
| 50 | out_buffer_(out_buffer), |
| 51 | out_buffer_pos_(0) { |
| 52 | out_buffer_[out_buffer_pos_] = '\0'; |
| 53 | } |
| 54 | |
| 55 | ~Decoder() {} |
| 56 | |
| 57 | // Writes one disassembled instruction into 'buffer' (0-terminated). |
| 58 | // Returns the length of the disassembled machine instruction in bytes. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 59 | int InstructionDecode(byte* instruction); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 60 | |
| 61 | private: |
| 62 | // Bottleneck functions to print into the out_buffer. |
| 63 | void PrintChar(const char ch); |
| 64 | void Print(const char* str); |
| 65 | |
| 66 | // Printing of common values. |
| 67 | void PrintRegister(int reg); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 68 | void PrintFPURegister(int freg); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 69 | void PrintFPUStatusRegister(int freg); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 70 | void PrintRs(Instruction* instr); |
| 71 | void PrintRt(Instruction* instr); |
| 72 | void PrintRd(Instruction* instr); |
| 73 | void PrintFs(Instruction* instr); |
| 74 | void PrintFt(Instruction* instr); |
| 75 | void PrintFd(Instruction* instr); |
| 76 | void PrintSa(Instruction* instr); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 77 | void PrintLsaSa(Instruction* instr); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 78 | void PrintSd(Instruction* instr); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 79 | void PrintSs1(Instruction* instr); |
| 80 | void PrintSs2(Instruction* instr); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 81 | void PrintBc(Instruction* instr); |
| 82 | void PrintCc(Instruction* instr); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 83 | void PrintBp2(Instruction* instr); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 84 | void PrintFunction(Instruction* instr); |
| 85 | void PrintSecondaryField(Instruction* instr); |
| 86 | void PrintUImm16(Instruction* instr); |
| 87 | void PrintSImm16(Instruction* instr); |
| 88 | void PrintXImm16(Instruction* instr); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 89 | void PrintPCImm16(Instruction* instr, int delta_pc, int n_bits); |
| 90 | void PrintXImm18(Instruction* instr); |
| 91 | void PrintSImm18(Instruction* instr); |
| 92 | void PrintXImm19(Instruction* instr); |
| 93 | void PrintSImm19(Instruction* instr); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 94 | void PrintXImm21(Instruction* instr); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 95 | void PrintSImm21(Instruction* instr); |
| 96 | void PrintPCImm21(Instruction* instr, int delta_pc, int n_bits); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 97 | void PrintXImm26(Instruction* instr); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 98 | void PrintSImm26(Instruction* instr); |
| 99 | void PrintPCImm26(Instruction* instr, int delta_pc, int n_bits); |
| 100 | void PrintPCImm26(Instruction* instr); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 101 | void PrintCode(Instruction* instr); // For break and trap instructions. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 102 | void PrintFormat(Instruction* instr); // For floating format postfix. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 103 | // Printing of instruction name. |
| 104 | void PrintInstructionName(Instruction* instr); |
| 105 | |
| 106 | // Handle formatting of instructions and their options. |
| 107 | int FormatRegister(Instruction* instr, const char* option); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 108 | int FormatFPURegister(Instruction* instr, const char* option); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 109 | int FormatOption(Instruction* instr, const char* option); |
| 110 | void Format(Instruction* instr, const char* format); |
| 111 | void Unknown(Instruction* instr); |
| 112 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 113 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 114 | // Each of these functions decodes one particular instruction type. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 115 | bool DecodeTypeRegisterRsType(Instruction* instr); |
| 116 | void DecodeTypeRegisterSRsType(Instruction* instr); |
| 117 | void DecodeTypeRegisterDRsType(Instruction* instr); |
| 118 | void DecodeTypeRegisterLRsType(Instruction* instr); |
| 119 | void DecodeTypeRegisterWRsType(Instruction* instr); |
| 120 | void DecodeTypeRegisterSPECIAL(Instruction* instr); |
| 121 | void DecodeTypeRegisterSPECIAL2(Instruction* instr); |
| 122 | void DecodeTypeRegisterSPECIAL3(Instruction* instr); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 123 | void DecodeTypeRegister(Instruction* instr); |
| 124 | void DecodeTypeImmediate(Instruction* instr); |
| 125 | void DecodeTypeJump(Instruction* instr); |
| 126 | |
| 127 | const disasm::NameConverter& converter_; |
| 128 | v8::internal::Vector<char> out_buffer_; |
| 129 | int out_buffer_pos_; |
| 130 | |
| 131 | DISALLOW_COPY_AND_ASSIGN(Decoder); |
| 132 | }; |
| 133 | |
| 134 | |
| 135 | // Support for assertions in the Decoder formatting functions. |
| 136 | #define STRING_STARTS_WITH(string, compare_string) \ |
| 137 | (strncmp(string, compare_string, strlen(compare_string)) == 0) |
| 138 | |
| 139 | |
| 140 | // Append the ch to the output buffer. |
| 141 | void Decoder::PrintChar(const char ch) { |
| 142 | out_buffer_[out_buffer_pos_++] = ch; |
| 143 | } |
| 144 | |
| 145 | |
| 146 | // Append the str to the output buffer. |
| 147 | void Decoder::Print(const char* str) { |
| 148 | char cur = *str++; |
| 149 | while (cur != '\0' && (out_buffer_pos_ < (out_buffer_.length() - 1))) { |
| 150 | PrintChar(cur); |
| 151 | cur = *str++; |
| 152 | } |
| 153 | out_buffer_[out_buffer_pos_] = 0; |
| 154 | } |
| 155 | |
| 156 | |
| 157 | // Print the register name according to the active name converter. |
| 158 | void Decoder::PrintRegister(int reg) { |
| 159 | Print(converter_.NameOfCPURegister(reg)); |
| 160 | } |
| 161 | |
| 162 | |
| 163 | void Decoder::PrintRs(Instruction* instr) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 164 | int reg = instr->RsValue(); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 165 | PrintRegister(reg); |
| 166 | } |
| 167 | |
| 168 | |
| 169 | void Decoder::PrintRt(Instruction* instr) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 170 | int reg = instr->RtValue(); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 171 | PrintRegister(reg); |
| 172 | } |
| 173 | |
| 174 | |
| 175 | void Decoder::PrintRd(Instruction* instr) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 176 | int reg = instr->RdValue(); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 177 | PrintRegister(reg); |
| 178 | } |
| 179 | |
| 180 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 181 | // Print the FPUregister name according to the active name converter. |
| 182 | void Decoder::PrintFPURegister(int freg) { |
| 183 | Print(converter_.NameOfXMMRegister(freg)); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 187 | void Decoder::PrintFPUStatusRegister(int freg) { |
| 188 | switch (freg) { |
| 189 | case kFCSRRegister: |
| 190 | Print("FCSR"); |
| 191 | break; |
| 192 | default: |
| 193 | Print(converter_.NameOfXMMRegister(freg)); |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 198 | void Decoder::PrintFs(Instruction* instr) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 199 | int freg = instr->RsValue(); |
| 200 | PrintFPURegister(freg); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 201 | } |
| 202 | |
| 203 | |
| 204 | void Decoder::PrintFt(Instruction* instr) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 205 | int freg = instr->RtValue(); |
| 206 | PrintFPURegister(freg); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 207 | } |
| 208 | |
| 209 | |
| 210 | void Decoder::PrintFd(Instruction* instr) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 211 | int freg = instr->RdValue(); |
| 212 | PrintFPURegister(freg); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 213 | } |
| 214 | |
| 215 | |
| 216 | // Print the integer value of the sa field. |
| 217 | void Decoder::PrintSa(Instruction* instr) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 218 | int sa = instr->SaValue(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 219 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, "%d", sa); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 220 | } |
| 221 | |
| 222 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 223 | // Print the integer value of the sa field of a lsa instruction. |
| 224 | void Decoder::PrintLsaSa(Instruction* instr) { |
| 225 | int sa = instr->LsaSaValue() + 1; |
| 226 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, "%d", sa); |
| 227 | } |
| 228 | |
| 229 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 230 | // Print the integer value of the rd field, when it is not used as reg. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 231 | void Decoder::PrintSd(Instruction* instr) { |
| 232 | int sd = instr->RdValue(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 233 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, "%d", sd); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 237 | // Print the integer value of the rd field, when used as 'ext' size. |
| 238 | void Decoder::PrintSs1(Instruction* instr) { |
| 239 | int ss = instr->RdValue(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 240 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, "%d", ss + 1); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | |
| 244 | // Print the integer value of the rd field, when used as 'ins' size. |
| 245 | void Decoder::PrintSs2(Instruction* instr) { |
| 246 | int ss = instr->RdValue(); |
| 247 | int pos = instr->SaValue(); |
| 248 | out_buffer_pos_ += |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 249 | SNPrintF(out_buffer_ + out_buffer_pos_, "%d", ss - pos + 1); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 250 | } |
| 251 | |
| 252 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 253 | // Print the integer value of the cc field for the bc1t/f instructions. |
| 254 | void Decoder::PrintBc(Instruction* instr) { |
| 255 | int cc = instr->FBccValue(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 256 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, "%d", cc); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 257 | } |
| 258 | |
| 259 | |
| 260 | // Print the integer value of the cc field for the FP compare instructions. |
| 261 | void Decoder::PrintCc(Instruction* instr) { |
| 262 | int cc = instr->FCccValue(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 263 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, "cc(%d)", cc); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 264 | } |
| 265 | |
| 266 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 267 | void Decoder::PrintBp2(Instruction* instr) { |
| 268 | int bp2 = instr->Bp2Value(); |
| 269 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, "%d", bp2); |
| 270 | } |
| 271 | |
| 272 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 273 | // Print 16-bit unsigned immediate value. |
| 274 | void Decoder::PrintUImm16(Instruction* instr) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 275 | int32_t imm = instr->Imm16Value(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 276 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, "%u", imm); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 277 | } |
| 278 | |
| 279 | |
| 280 | // Print 16-bit signed immediate value. |
| 281 | void Decoder::PrintSImm16(Instruction* instr) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 282 | int32_t imm = ((instr->Imm16Value()) << 16) >> 16; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 283 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, "%d", imm); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 284 | } |
| 285 | |
| 286 | |
| 287 | // Print 16-bit hexa immediate value. |
| 288 | void Decoder::PrintXImm16(Instruction* instr) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 289 | int32_t imm = instr->Imm16Value(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 290 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, "0x%x", imm); |
| 291 | } |
| 292 | |
| 293 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 294 | // Print absoulte address for 16-bit offset or immediate value. |
| 295 | // The absolute address is calculated according following expression: |
| 296 | // PC + delta_pc + (offset << n_bits) |
| 297 | void Decoder::PrintPCImm16(Instruction* instr, int delta_pc, int n_bits) { |
| 298 | int16_t offset = instr->Imm16Value(); |
| 299 | out_buffer_pos_ += |
| 300 | SNPrintF(out_buffer_ + out_buffer_pos_, "%s", |
| 301 | converter_.NameOfAddress(reinterpret_cast<byte*>(instr) + |
| 302 | delta_pc + (offset << n_bits))); |
| 303 | } |
| 304 | |
| 305 | |
| 306 | // Print 18-bit signed immediate value. |
| 307 | void Decoder::PrintSImm18(Instruction* instr) { |
| 308 | int32_t imm = |
| 309 | ((instr->Imm18Value()) << (32 - kImm18Bits)) >> (32 - kImm18Bits); |
| 310 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, "%d", imm); |
| 311 | } |
| 312 | |
| 313 | |
| 314 | // Print 18-bit hexa immediate value. |
| 315 | void Decoder::PrintXImm18(Instruction* instr) { |
| 316 | int32_t imm = instr->Imm18Value(); |
| 317 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, "0x%x", imm); |
| 318 | } |
| 319 | |
| 320 | |
| 321 | // Print 19-bit hexa immediate value. |
| 322 | void Decoder::PrintXImm19(Instruction* instr) { |
| 323 | int32_t imm = instr->Imm19Value(); |
| 324 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, "0x%x", imm); |
| 325 | } |
| 326 | |
| 327 | |
| 328 | // Print 19-bit signed immediate value. |
| 329 | void Decoder::PrintSImm19(Instruction* instr) { |
| 330 | int32_t imm19 = instr->Imm19Value(); |
| 331 | // set sign |
| 332 | imm19 <<= (32 - kImm19Bits); |
| 333 | imm19 >>= (32 - kImm19Bits); |
| 334 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, "%d", imm19); |
| 335 | } |
| 336 | |
| 337 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 338 | // Print 21-bit immediate value. |
| 339 | void Decoder::PrintXImm21(Instruction* instr) { |
| 340 | uint32_t imm = instr->Imm21Value(); |
| 341 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, "0x%x", imm); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 345 | // Print 21-bit signed immediate value. |
| 346 | void Decoder::PrintSImm21(Instruction* instr) { |
| 347 | int32_t imm21 = instr->Imm21Value(); |
| 348 | // set sign |
| 349 | imm21 <<= (32 - kImm21Bits); |
| 350 | imm21 >>= (32 - kImm21Bits); |
| 351 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, "%d", imm21); |
| 352 | } |
| 353 | |
| 354 | |
| 355 | // Print absoulte address for 21-bit offset or immediate value. |
| 356 | // The absolute address is calculated according following expression: |
| 357 | // PC + delta_pc + (offset << n_bits) |
| 358 | void Decoder::PrintPCImm21(Instruction* instr, int delta_pc, int n_bits) { |
| 359 | int32_t imm21 = instr->Imm21Value(); |
| 360 | // set sign |
| 361 | imm21 <<= (32 - kImm21Bits); |
| 362 | imm21 >>= (32 - kImm21Bits); |
| 363 | out_buffer_pos_ += |
| 364 | SNPrintF(out_buffer_ + out_buffer_pos_, "%s", |
| 365 | converter_.NameOfAddress(reinterpret_cast<byte*>(instr) + |
| 366 | delta_pc + (imm21 << n_bits))); |
| 367 | } |
| 368 | |
| 369 | |
| 370 | // Print 26-bit hex immediate value. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 371 | void Decoder::PrintXImm26(Instruction* instr) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 372 | uint32_t target = static_cast<uint32_t>(instr->Imm26Value()) |
| 373 | << kImmFieldShift; |
| 374 | target = (reinterpret_cast<uint32_t>(instr) & ~0xfffffff) | target; |
| 375 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, "0x%x", target); |
| 376 | } |
| 377 | |
| 378 | |
| 379 | // Print 26-bit signed immediate value. |
| 380 | void Decoder::PrintSImm26(Instruction* instr) { |
| 381 | int32_t imm26 = instr->Imm26Value(); |
| 382 | // set sign |
| 383 | imm26 <<= (32 - kImm26Bits); |
| 384 | imm26 >>= (32 - kImm26Bits); |
| 385 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, "%d", imm26); |
| 386 | } |
| 387 | |
| 388 | |
| 389 | // Print absoulte address for 26-bit offset or immediate value. |
| 390 | // The absolute address is calculated according following expression: |
| 391 | // PC + delta_pc + (offset << n_bits) |
| 392 | void Decoder::PrintPCImm26(Instruction* instr, int delta_pc, int n_bits) { |
| 393 | int32_t imm26 = instr->Imm26Value(); |
| 394 | // set sign |
| 395 | imm26 <<= (32 - kImm26Bits); |
| 396 | imm26 >>= (32 - kImm26Bits); |
| 397 | out_buffer_pos_ += |
| 398 | SNPrintF(out_buffer_ + out_buffer_pos_, "%s", |
| 399 | converter_.NameOfAddress(reinterpret_cast<byte*>(instr) + |
| 400 | delta_pc + (imm26 << n_bits))); |
| 401 | } |
| 402 | |
| 403 | |
| 404 | // Print absoulte address for 26-bit offset or immediate value. |
| 405 | // The absolute address is calculated according following expression: |
| 406 | // PC[GPRLEN-1 .. 28] || instr_index26 || 00 |
| 407 | void Decoder::PrintPCImm26(Instruction* instr) { |
| 408 | int32_t imm26 = instr->Imm26Value(); |
| 409 | uint32_t pc_mask = ~0xfffffff; |
| 410 | uint32_t pc = ((uint32_t)(instr + 1) & pc_mask) | (imm26 << 2); |
| 411 | out_buffer_pos_ += |
| 412 | SNPrintF(out_buffer_ + out_buffer_pos_, "%s", |
| 413 | converter_.NameOfAddress((reinterpret_cast<byte*>(pc)))); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 414 | } |
| 415 | |
| 416 | |
| 417 | // Print 26-bit immediate value. |
| 418 | void Decoder::PrintCode(Instruction* instr) { |
| 419 | if (instr->OpcodeFieldRaw() != SPECIAL) |
| 420 | return; // Not a break or trap instruction. |
| 421 | switch (instr->FunctionFieldRaw()) { |
| 422 | case BREAK: { |
| 423 | int32_t code = instr->Bits(25, 6); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 424 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, |
| 425 | "0x%05x (%d)", code, code); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 426 | break; |
| 427 | } |
| 428 | case TGE: |
| 429 | case TGEU: |
| 430 | case TLT: |
| 431 | case TLTU: |
| 432 | case TEQ: |
| 433 | case TNE: { |
| 434 | int32_t code = instr->Bits(15, 6); |
| 435 | out_buffer_pos_ += |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 436 | SNPrintF(out_buffer_ + out_buffer_pos_, "0x%03x", code); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 437 | break; |
| 438 | } |
| 439 | default: // Not a break or trap instruction. |
| 440 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 441 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 442 | } |
| 443 | |
| 444 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 445 | void Decoder::PrintFormat(Instruction* instr) { |
| 446 | char formatLetter = ' '; |
| 447 | switch (instr->RsFieldRaw()) { |
| 448 | case S: |
| 449 | formatLetter = 's'; |
| 450 | break; |
| 451 | case D: |
| 452 | formatLetter = 'd'; |
| 453 | break; |
| 454 | case W: |
| 455 | formatLetter = 'w'; |
| 456 | break; |
| 457 | case L: |
| 458 | formatLetter = 'l'; |
| 459 | break; |
| 460 | default: |
| 461 | UNREACHABLE(); |
| 462 | break; |
| 463 | } |
| 464 | PrintChar(formatLetter); |
| 465 | } |
| 466 | |
| 467 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 468 | // Printing of instruction name. |
| 469 | void Decoder::PrintInstructionName(Instruction* instr) { |
| 470 | } |
| 471 | |
| 472 | |
| 473 | // Handle all register based formatting in this function to reduce the |
| 474 | // complexity of FormatOption. |
| 475 | int Decoder::FormatRegister(Instruction* instr, const char* format) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 476 | DCHECK(format[0] == 'r'); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 477 | if (format[1] == 's') { // 'rs: Rs register. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 478 | int reg = instr->RsValue(); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 479 | PrintRegister(reg); |
| 480 | return 2; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 481 | } else if (format[1] == 't') { // 'rt: rt register. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 482 | int reg = instr->RtValue(); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 483 | PrintRegister(reg); |
| 484 | return 2; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 485 | } else if (format[1] == 'd') { // 'rd: rd register. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 486 | int reg = instr->RdValue(); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 487 | PrintRegister(reg); |
| 488 | return 2; |
| 489 | } |
| 490 | UNREACHABLE(); |
| 491 | return -1; |
| 492 | } |
| 493 | |
| 494 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 495 | // Handle all FPUregister based formatting in this function to reduce the |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 496 | // complexity of FormatOption. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 497 | int Decoder::FormatFPURegister(Instruction* instr, const char* format) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 498 | DCHECK(format[0] == 'f'); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 499 | if ((CTC1 == instr->RsFieldRaw()) || (CFC1 == instr->RsFieldRaw())) { |
| 500 | if (format[1] == 's') { // 'fs: fs register. |
| 501 | int reg = instr->FsValue(); |
| 502 | PrintFPUStatusRegister(reg); |
| 503 | return 2; |
| 504 | } else if (format[1] == 't') { // 'ft: ft register. |
| 505 | int reg = instr->FtValue(); |
| 506 | PrintFPUStatusRegister(reg); |
| 507 | return 2; |
| 508 | } else if (format[1] == 'd') { // 'fd: fd register. |
| 509 | int reg = instr->FdValue(); |
| 510 | PrintFPUStatusRegister(reg); |
| 511 | return 2; |
| 512 | } else if (format[1] == 'r') { // 'fr: fr register. |
| 513 | int reg = instr->FrValue(); |
| 514 | PrintFPUStatusRegister(reg); |
| 515 | return 2; |
| 516 | } |
| 517 | } else { |
| 518 | if (format[1] == 's') { // 'fs: fs register. |
| 519 | int reg = instr->FsValue(); |
| 520 | PrintFPURegister(reg); |
| 521 | return 2; |
| 522 | } else if (format[1] == 't') { // 'ft: ft register. |
| 523 | int reg = instr->FtValue(); |
| 524 | PrintFPURegister(reg); |
| 525 | return 2; |
| 526 | } else if (format[1] == 'd') { // 'fd: fd register. |
| 527 | int reg = instr->FdValue(); |
| 528 | PrintFPURegister(reg); |
| 529 | return 2; |
| 530 | } else if (format[1] == 'r') { // 'fr: fr register. |
| 531 | int reg = instr->FrValue(); |
| 532 | PrintFPURegister(reg); |
| 533 | return 2; |
| 534 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 535 | } |
| 536 | UNREACHABLE(); |
| 537 | return -1; |
| 538 | } |
| 539 | |
| 540 | |
| 541 | // FormatOption takes a formatting string and interprets it based on |
| 542 | // the current instructions. The format string points to the first |
| 543 | // character of the option string (the option escape has already been |
| 544 | // consumed by the caller.) FormatOption returns the number of |
| 545 | // characters that were consumed from the formatting string. |
| 546 | int Decoder::FormatOption(Instruction* instr, const char* format) { |
| 547 | switch (format[0]) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 548 | case 'c': { // 'code for break or trap instructions. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 549 | DCHECK(STRING_STARTS_WITH(format, "code")); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 550 | PrintCode(instr); |
| 551 | return 4; |
| 552 | } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 553 | case 'i': { // 'imm16u or 'imm26. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 554 | if (format[3] == '1') { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 555 | if (format[4] == '6') { |
| 556 | DCHECK(STRING_STARTS_WITH(format, "imm16")); |
| 557 | switch (format[5]) { |
| 558 | case 's': |
| 559 | DCHECK(STRING_STARTS_WITH(format, "imm16s")); |
| 560 | PrintSImm16(instr); |
| 561 | break; |
| 562 | case 'u': |
| 563 | DCHECK(STRING_STARTS_WITH(format, "imm16u")); |
| 564 | PrintSImm16(instr); |
| 565 | break; |
| 566 | case 'x': |
| 567 | DCHECK(STRING_STARTS_WITH(format, "imm16x")); |
| 568 | PrintXImm16(instr); |
| 569 | break; |
| 570 | case 'p': { // The PC relative address. |
| 571 | DCHECK(STRING_STARTS_WITH(format, "imm16p")); |
| 572 | int delta_pc = 0; |
| 573 | int n_bits = 0; |
| 574 | switch (format[6]) { |
| 575 | case '4': { |
| 576 | DCHECK(STRING_STARTS_WITH(format, "imm16p4")); |
| 577 | delta_pc = 4; |
| 578 | switch (format[8]) { |
| 579 | case '2': |
| 580 | DCHECK(STRING_STARTS_WITH(format, "imm16p4s2")); |
| 581 | n_bits = 2; |
| 582 | PrintPCImm16(instr, delta_pc, n_bits); |
| 583 | return 9; |
| 584 | } |
| 585 | } |
| 586 | } |
| 587 | } |
| 588 | } |
| 589 | return 6; |
| 590 | } else if (format[4] == '8') { |
| 591 | DCHECK(STRING_STARTS_WITH(format, "imm18")); |
| 592 | switch (format[5]) { |
| 593 | case 's': |
| 594 | DCHECK(STRING_STARTS_WITH(format, "imm18s")); |
| 595 | PrintSImm18(instr); |
| 596 | break; |
| 597 | case 'x': |
| 598 | DCHECK(STRING_STARTS_WITH(format, "imm18x")); |
| 599 | PrintXImm18(instr); |
| 600 | break; |
| 601 | } |
| 602 | return 6; |
| 603 | } else if (format[4] == '9') { |
| 604 | DCHECK(STRING_STARTS_WITH(format, "imm19")); |
| 605 | switch (format[5]) { |
| 606 | case 's': |
| 607 | DCHECK(STRING_STARTS_WITH(format, "imm19s")); |
| 608 | PrintSImm19(instr); |
| 609 | break; |
| 610 | case 'x': |
| 611 | DCHECK(STRING_STARTS_WITH(format, "imm19x")); |
| 612 | PrintXImm19(instr); |
| 613 | break; |
| 614 | } |
| 615 | return 6; |
| 616 | } |
| 617 | } else if (format[3] == '2' && format[4] == '1') { |
| 618 | DCHECK(STRING_STARTS_WITH(format, "imm21")); |
| 619 | switch (format[5]) { |
| 620 | case 's': |
| 621 | DCHECK(STRING_STARTS_WITH(format, "imm21s")); |
| 622 | PrintSImm21(instr); |
| 623 | break; |
| 624 | case 'x': |
| 625 | DCHECK(STRING_STARTS_WITH(format, "imm21x")); |
| 626 | PrintXImm21(instr); |
| 627 | break; |
| 628 | case 'p': { // The PC relative address. |
| 629 | DCHECK(STRING_STARTS_WITH(format, "imm21p")); |
| 630 | int delta_pc = 0; |
| 631 | int n_bits = 0; |
| 632 | switch (format[6]) { |
| 633 | case '4': { |
| 634 | DCHECK(STRING_STARTS_WITH(format, "imm21p4")); |
| 635 | delta_pc = 4; |
| 636 | switch (format[8]) { |
| 637 | case '2': |
| 638 | DCHECK(STRING_STARTS_WITH(format, "imm21p4s2")); |
| 639 | n_bits = 2; |
| 640 | PrintPCImm21(instr, delta_pc, n_bits); |
| 641 | return 9; |
| 642 | } |
| 643 | } |
| 644 | } |
| 645 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 646 | } |
| 647 | return 6; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 648 | } else if (format[3] == '2' && format[4] == '6') { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 649 | DCHECK(STRING_STARTS_WITH(format, "imm26")); |
| 650 | switch (format[5]) { |
| 651 | case 's': |
| 652 | DCHECK(STRING_STARTS_WITH(format, "imm26s")); |
| 653 | PrintSImm26(instr); |
| 654 | break; |
| 655 | case 'x': |
| 656 | DCHECK(STRING_STARTS_WITH(format, "imm26x")); |
| 657 | PrintXImm26(instr); |
| 658 | break; |
| 659 | case 'p': { // The PC relative address. |
| 660 | DCHECK(STRING_STARTS_WITH(format, "imm26p")); |
| 661 | int delta_pc = 0; |
| 662 | int n_bits = 0; |
| 663 | switch (format[6]) { |
| 664 | case '4': { |
| 665 | DCHECK(STRING_STARTS_WITH(format, "imm26p4")); |
| 666 | delta_pc = 4; |
| 667 | switch (format[8]) { |
| 668 | case '2': |
| 669 | DCHECK(STRING_STARTS_WITH(format, "imm26p4s2")); |
| 670 | n_bits = 2; |
| 671 | PrintPCImm26(instr, delta_pc, n_bits); |
| 672 | return 9; |
| 673 | } |
| 674 | } |
| 675 | } |
| 676 | } |
| 677 | case 'j': { // Absolute address for jump instructions. |
| 678 | DCHECK(STRING_STARTS_WITH(format, "imm26j")); |
| 679 | PrintPCImm26(instr); |
| 680 | break; |
| 681 | } |
| 682 | } |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 683 | return 6; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 684 | } |
| 685 | } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 686 | case 'r': { // 'r: registers. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 687 | return FormatRegister(instr, format); |
| 688 | } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 689 | case 'f': { // 'f: FPUregisters. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 690 | return FormatFPURegister(instr, format); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 691 | } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 692 | case 's': { // 'sa. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 693 | switch (format[1]) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 694 | case 'a': |
| 695 | if (format[2] == '2') { |
| 696 | DCHECK(STRING_STARTS_WITH(format, "sa2")); // 'sa2 |
| 697 | PrintLsaSa(instr); |
| 698 | return 3; |
| 699 | } else { |
| 700 | DCHECK(STRING_STARTS_WITH(format, "sa")); |
| 701 | PrintSa(instr); |
| 702 | return 2; |
| 703 | } |
| 704 | break; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 705 | case 'd': { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 706 | DCHECK(STRING_STARTS_WITH(format, "sd")); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 707 | PrintSd(instr); |
| 708 | return 2; |
| 709 | } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 710 | case 's': { |
| 711 | if (format[2] == '1') { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 712 | DCHECK(STRING_STARTS_WITH(format, "ss1")); /* ext size */ |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 713 | PrintSs1(instr); |
| 714 | return 3; |
| 715 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 716 | DCHECK(STRING_STARTS_WITH(format, "ss2")); /* ins size */ |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 717 | PrintSs2(instr); |
| 718 | return 3; |
| 719 | } |
| 720 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 721 | } |
| 722 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 723 | case 'b': { |
| 724 | switch (format[1]) { |
| 725 | case 'c': { // 'bc - Special for bc1 cc field. |
| 726 | DCHECK(STRING_STARTS_WITH(format, "bc")); |
| 727 | PrintBc(instr); |
| 728 | return 2; |
| 729 | } |
| 730 | case 'p': { |
| 731 | switch (format[2]) { |
| 732 | case '2': { // 'bp2 |
| 733 | DCHECK(STRING_STARTS_WITH(format, "bp2")); |
| 734 | PrintBp2(instr); |
| 735 | return 3; |
| 736 | } |
| 737 | } |
| 738 | } |
| 739 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 740 | } |
| 741 | case 'C': { // 'Cc - Special for c.xx.d cc field. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 742 | DCHECK(STRING_STARTS_WITH(format, "Cc")); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 743 | PrintCc(instr); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 744 | return 2; |
| 745 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 746 | case 't': |
| 747 | PrintFormat(instr); |
| 748 | return 1; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 749 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 750 | UNREACHABLE(); |
| 751 | return -1; |
| 752 | } |
| 753 | |
| 754 | |
| 755 | // Format takes a formatting string for a whole instruction and prints it into |
| 756 | // the output buffer. All escaped options are handed to FormatOption to be |
| 757 | // parsed further. |
| 758 | void Decoder::Format(Instruction* instr, const char* format) { |
| 759 | char cur = *format++; |
| 760 | while ((cur != 0) && (out_buffer_pos_ < (out_buffer_.length() - 1))) { |
| 761 | if (cur == '\'') { // Single quote is used as the formatting escape. |
| 762 | format += FormatOption(instr, format); |
| 763 | } else { |
| 764 | out_buffer_[out_buffer_pos_++] = cur; |
| 765 | } |
| 766 | cur = *format++; |
| 767 | } |
| 768 | out_buffer_[out_buffer_pos_] = '\0'; |
| 769 | } |
| 770 | |
| 771 | |
| 772 | // For currently unimplemented decodings the disassembler calls Unknown(instr) |
| 773 | // which will just print "unknown" of the instruction bits. |
| 774 | void Decoder::Unknown(Instruction* instr) { |
| 775 | Format(instr, "unknown"); |
| 776 | } |
| 777 | |
| 778 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 779 | bool Decoder::DecodeTypeRegisterRsType(Instruction* instr) { |
| 780 | switch (instr->FunctionFieldRaw()) { |
| 781 | case RINT: |
| 782 | Format(instr, "rint.'t 'fd, 'fs"); |
| 783 | break; |
| 784 | case MIN: |
| 785 | Format(instr, "min.'t 'fd, 'fs, 'ft"); |
| 786 | break; |
| 787 | case MAX: |
| 788 | Format(instr, "max.'t 'fd, 'fs, 'ft"); |
| 789 | break; |
| 790 | case MINA: |
| 791 | Format(instr, "mina.'t 'fd, 'fs, 'ft"); |
| 792 | break; |
| 793 | case MAXA: |
| 794 | Format(instr, "maxa.'t 'fd, 'fs, 'ft"); |
| 795 | break; |
| 796 | case SEL: |
| 797 | Format(instr, "sel.'t 'fd, 'fs, 'ft"); |
| 798 | break; |
| 799 | case SELEQZ_C: |
| 800 | Format(instr, "seleqz.'t 'fd, 'fs, 'ft"); |
| 801 | break; |
| 802 | case SELNEZ_C: |
| 803 | Format(instr, "selnez.'t 'fd, 'fs, 'ft"); |
| 804 | break; |
| 805 | case MOVZ_C: |
| 806 | Format(instr, "movz.'t 'fd, 'fs, 'rt"); |
| 807 | break; |
| 808 | case MOVN_C: |
| 809 | Format(instr, "movn.'t 'fd, 'fs, 'rt"); |
| 810 | break; |
| 811 | case MOVF: |
| 812 | if (instr->Bit(16)) { |
| 813 | Format(instr, "movt.'t 'fd, 'fs, 'Cc"); |
| 814 | } else { |
| 815 | Format(instr, "movf.'t 'fd, 'fs, 'Cc"); |
| 816 | } |
| 817 | break; |
| 818 | case ADD_D: |
| 819 | Format(instr, "add.'t 'fd, 'fs, 'ft"); |
| 820 | break; |
| 821 | case SUB_D: |
| 822 | Format(instr, "sub.'t 'fd, 'fs, 'ft"); |
| 823 | break; |
| 824 | case MUL_D: |
| 825 | Format(instr, "mul.'t 'fd, 'fs, 'ft"); |
| 826 | break; |
| 827 | case DIV_D: |
| 828 | Format(instr, "div.'t 'fd, 'fs, 'ft"); |
| 829 | break; |
| 830 | case ABS_D: |
| 831 | Format(instr, "abs.'t 'fd, 'fs"); |
| 832 | break; |
| 833 | case MOV_D: |
| 834 | Format(instr, "mov.'t 'fd, 'fs"); |
| 835 | break; |
| 836 | case NEG_D: |
| 837 | Format(instr, "neg.'t 'fd, 'fs"); |
| 838 | break; |
| 839 | case SQRT_D: |
| 840 | Format(instr, "sqrt.'t 'fd, 'fs"); |
| 841 | break; |
| 842 | case RECIP_D: |
| 843 | Format(instr, "recip.'t 'fd, 'fs"); |
| 844 | break; |
| 845 | case RSQRT_D: |
| 846 | Format(instr, "rsqrt.'t 'fd, 'fs"); |
| 847 | break; |
| 848 | case CVT_W_D: |
| 849 | Format(instr, "cvt.w.'t 'fd, 'fs"); |
| 850 | break; |
| 851 | case CVT_L_D: |
| 852 | Format(instr, "cvt.l.'t 'fd, 'fs"); |
| 853 | break; |
| 854 | case TRUNC_W_D: |
| 855 | Format(instr, "trunc.w.'t 'fd, 'fs"); |
| 856 | break; |
| 857 | case TRUNC_L_D: |
| 858 | Format(instr, "trunc.l.'t 'fd, 'fs"); |
| 859 | break; |
| 860 | case ROUND_W_D: |
| 861 | Format(instr, "round.w.'t 'fd, 'fs"); |
| 862 | break; |
| 863 | case ROUND_L_D: |
| 864 | Format(instr, "round.l.'t 'fd, 'fs"); |
| 865 | break; |
| 866 | case FLOOR_W_D: |
| 867 | Format(instr, "floor.w.'t 'fd, 'fs"); |
| 868 | break; |
| 869 | case FLOOR_L_D: |
| 870 | Format(instr, "floor.l.'t 'fd, 'fs"); |
| 871 | break; |
| 872 | case CEIL_W_D: |
| 873 | Format(instr, "ceil.w.'t 'fd, 'fs"); |
| 874 | break; |
| 875 | case CLASS_D: |
| 876 | Format(instr, "class.'t 'fd, 'fs"); |
| 877 | break; |
| 878 | case CEIL_L_D: |
| 879 | Format(instr, "ceil.l.'t 'fd, 'fs"); |
| 880 | break; |
| 881 | case CVT_S_D: |
| 882 | Format(instr, "cvt.s.'t 'fd, 'fs"); |
| 883 | break; |
| 884 | case C_F_D: |
| 885 | Format(instr, "c.f.'t 'fs, 'ft, 'Cc"); |
| 886 | break; |
| 887 | case C_UN_D: |
| 888 | Format(instr, "c.un.'t 'fs, 'ft, 'Cc"); |
| 889 | break; |
| 890 | case C_EQ_D: |
| 891 | Format(instr, "c.eq.'t 'fs, 'ft, 'Cc"); |
| 892 | break; |
| 893 | case C_UEQ_D: |
| 894 | Format(instr, "c.ueq.'t 'fs, 'ft, 'Cc"); |
| 895 | break; |
| 896 | case C_OLT_D: |
| 897 | Format(instr, "c.olt.'t 'fs, 'ft, 'Cc"); |
| 898 | break; |
| 899 | case C_ULT_D: |
| 900 | Format(instr, "c.ult.'t 'fs, 'ft, 'Cc"); |
| 901 | break; |
| 902 | case C_OLE_D: |
| 903 | Format(instr, "c.ole.'t 'fs, 'ft, 'Cc"); |
| 904 | break; |
| 905 | case C_ULE_D: |
| 906 | Format(instr, "c.ule.'t 'fs, 'ft, 'Cc"); |
| 907 | break; |
| 908 | default: |
| 909 | return false; |
| 910 | } |
| 911 | return true; |
| 912 | } |
| 913 | |
| 914 | |
| 915 | void Decoder::DecodeTypeRegisterSRsType(Instruction* instr) { |
| 916 | if (!DecodeTypeRegisterRsType(instr)) { |
| 917 | switch (instr->FunctionFieldRaw()) { |
| 918 | case CVT_D_S: |
| 919 | Format(instr, "cvt.d.'t 'fd, 'fs"); |
| 920 | break; |
| 921 | default: |
| 922 | Format(instr, "unknown.cop1.'t"); |
| 923 | break; |
| 924 | } |
| 925 | } |
| 926 | } |
| 927 | |
| 928 | |
| 929 | void Decoder::DecodeTypeRegisterDRsType(Instruction* instr) { |
| 930 | if (!DecodeTypeRegisterRsType(instr)) { |
| 931 | Format(instr, "unknown.cop1.'t"); |
| 932 | } |
| 933 | } |
| 934 | |
| 935 | |
| 936 | void Decoder::DecodeTypeRegisterLRsType(Instruction* instr) { |
| 937 | switch (instr->FunctionFieldRaw()) { |
| 938 | case CVT_D_L: |
| 939 | Format(instr, "cvt.d.l 'fd, 'fs"); |
| 940 | break; |
| 941 | case CVT_S_L: |
| 942 | Format(instr, "cvt.s.l 'fd, 'fs"); |
| 943 | break; |
| 944 | case CMP_AF: |
| 945 | Format(instr, "cmp.af.d 'fd, 'fs, 'ft"); |
| 946 | break; |
| 947 | case CMP_UN: |
| 948 | Format(instr, "cmp.un.d 'fd, 'fs, 'ft"); |
| 949 | break; |
| 950 | case CMP_EQ: |
| 951 | Format(instr, "cmp.eq.d 'fd, 'fs, 'ft"); |
| 952 | break; |
| 953 | case CMP_UEQ: |
| 954 | Format(instr, "cmp.ueq.d 'fd, 'fs, 'ft"); |
| 955 | break; |
| 956 | case CMP_LT: |
| 957 | Format(instr, "cmp.lt.d 'fd, 'fs, 'ft"); |
| 958 | break; |
| 959 | case CMP_ULT: |
| 960 | Format(instr, "cmp.ult.d 'fd, 'fs, 'ft"); |
| 961 | break; |
| 962 | case CMP_LE: |
| 963 | Format(instr, "cmp.le.d 'fd, 'fs, 'ft"); |
| 964 | break; |
| 965 | case CMP_ULE: |
| 966 | Format(instr, "cmp.ule.d 'fd, 'fs, 'ft"); |
| 967 | break; |
| 968 | case CMP_OR: |
| 969 | Format(instr, "cmp.or.d 'fd, 'fs, 'ft"); |
| 970 | break; |
| 971 | case CMP_UNE: |
| 972 | Format(instr, "cmp.une.d 'fd, 'fs, 'ft"); |
| 973 | break; |
| 974 | case CMP_NE: |
| 975 | Format(instr, "cmp.ne.d 'fd, 'fs, 'ft"); |
| 976 | break; |
| 977 | default: |
| 978 | UNREACHABLE(); |
| 979 | } |
| 980 | } |
| 981 | |
| 982 | |
| 983 | void Decoder::DecodeTypeRegisterWRsType(Instruction* instr) { |
| 984 | switch (instr->FunctionValue()) { |
| 985 | case CVT_S_W: // Convert word to float (single). |
| 986 | Format(instr, "cvt.s.w 'fd, 'fs"); |
| 987 | break; |
| 988 | case CVT_D_W: // Convert word to double. |
| 989 | Format(instr, "cvt.d.w 'fd, 'fs"); |
| 990 | break; |
| 991 | case CMP_AF: |
| 992 | Format(instr, "cmp.af.s 'fd, 'fs, 'ft"); |
| 993 | break; |
| 994 | case CMP_UN: |
| 995 | Format(instr, "cmp.un.s 'fd, 'fs, 'ft"); |
| 996 | break; |
| 997 | case CMP_EQ: |
| 998 | Format(instr, "cmp.eq.s 'fd, 'fs, 'ft"); |
| 999 | break; |
| 1000 | case CMP_UEQ: |
| 1001 | Format(instr, "cmp.ueq.s 'fd, 'fs, 'ft"); |
| 1002 | break; |
| 1003 | case CMP_LT: |
| 1004 | Format(instr, "cmp.lt.s 'fd, 'fs, 'ft"); |
| 1005 | break; |
| 1006 | case CMP_ULT: |
| 1007 | Format(instr, "cmp.ult.s 'fd, 'fs, 'ft"); |
| 1008 | break; |
| 1009 | case CMP_LE: |
| 1010 | Format(instr, "cmp.le.s 'fd, 'fs, 'ft"); |
| 1011 | break; |
| 1012 | case CMP_ULE: |
| 1013 | Format(instr, "cmp.ule.s 'fd, 'fs, 'ft"); |
| 1014 | break; |
| 1015 | case CMP_OR: |
| 1016 | Format(instr, "cmp.or.s 'fd, 'fs, 'ft"); |
| 1017 | break; |
| 1018 | case CMP_UNE: |
| 1019 | Format(instr, "cmp.une.s 'fd, 'fs, 'ft"); |
| 1020 | break; |
| 1021 | case CMP_NE: |
| 1022 | Format(instr, "cmp.ne.s 'fd, 'fs, 'ft"); |
| 1023 | break; |
| 1024 | default: |
| 1025 | UNREACHABLE(); |
| 1026 | } |
| 1027 | } |
| 1028 | |
| 1029 | |
| 1030 | void Decoder::DecodeTypeRegisterSPECIAL(Instruction* instr) { |
| 1031 | switch (instr->FunctionFieldRaw()) { |
| 1032 | case JR: |
| 1033 | Format(instr, "jr 'rs"); |
| 1034 | break; |
| 1035 | case JALR: |
| 1036 | Format(instr, "jalr 'rs, 'rd"); |
| 1037 | break; |
| 1038 | case SLL: |
| 1039 | if (0x0 == static_cast<int>(instr->InstructionBits())) |
| 1040 | Format(instr, "nop"); |
| 1041 | else |
| 1042 | Format(instr, "sll 'rd, 'rt, 'sa"); |
| 1043 | break; |
| 1044 | case SRL: |
| 1045 | if (instr->RsValue() == 0) { |
| 1046 | Format(instr, "srl 'rd, 'rt, 'sa"); |
| 1047 | } else { |
| 1048 | if (IsMipsArchVariant(kMips32r2)) { |
| 1049 | Format(instr, "rotr 'rd, 'rt, 'sa"); |
| 1050 | } else { |
| 1051 | Unknown(instr); |
| 1052 | } |
| 1053 | } |
| 1054 | break; |
| 1055 | case SRA: |
| 1056 | Format(instr, "sra 'rd, 'rt, 'sa"); |
| 1057 | break; |
| 1058 | case SLLV: |
| 1059 | Format(instr, "sllv 'rd, 'rt, 'rs"); |
| 1060 | break; |
| 1061 | case SRLV: |
| 1062 | if (instr->SaValue() == 0) { |
| 1063 | Format(instr, "srlv 'rd, 'rt, 'rs"); |
| 1064 | } else { |
| 1065 | if (IsMipsArchVariant(kMips32r2)) { |
| 1066 | Format(instr, "rotrv 'rd, 'rt, 'rs"); |
| 1067 | } else { |
| 1068 | Unknown(instr); |
| 1069 | } |
| 1070 | } |
| 1071 | break; |
| 1072 | case SRAV: |
| 1073 | Format(instr, "srav 'rd, 'rt, 'rs"); |
| 1074 | break; |
| 1075 | case LSA: |
| 1076 | Format(instr, "lsa 'rd, 'rt, 'rs, 'sa2"); |
| 1077 | break; |
| 1078 | case MFHI: |
| 1079 | if (instr->Bits(25, 16) == 0) { |
| 1080 | Format(instr, "mfhi 'rd"); |
| 1081 | } else { |
| 1082 | if ((instr->FunctionFieldRaw() == CLZ_R6) && (instr->FdValue() == 1)) { |
| 1083 | Format(instr, "clz 'rd, 'rs"); |
| 1084 | } else if ((instr->FunctionFieldRaw() == CLO_R6) && |
| 1085 | (instr->FdValue() == 1)) { |
| 1086 | Format(instr, "clo 'rd, 'rs"); |
| 1087 | } |
| 1088 | } |
| 1089 | break; |
| 1090 | case MFLO: |
| 1091 | Format(instr, "mflo 'rd"); |
| 1092 | break; |
| 1093 | case MULT: // @Mips32r6 == MUL_MUH. |
| 1094 | if (!IsMipsArchVariant(kMips32r6)) { |
| 1095 | Format(instr, "mult 'rs, 'rt"); |
| 1096 | } else { |
| 1097 | if (instr->SaValue() == MUL_OP) { |
| 1098 | Format(instr, "mul 'rd, 'rs, 'rt"); |
| 1099 | } else { |
| 1100 | Format(instr, "muh 'rd, 'rs, 'rt"); |
| 1101 | } |
| 1102 | } |
| 1103 | break; |
| 1104 | case MULTU: // @Mips32r6 == MUL_MUH_U. |
| 1105 | if (!IsMipsArchVariant(kMips32r6)) { |
| 1106 | Format(instr, "multu 'rs, 'rt"); |
| 1107 | } else { |
| 1108 | if (instr->SaValue() == MUL_OP) { |
| 1109 | Format(instr, "mulu 'rd, 'rs, 'rt"); |
| 1110 | } else { |
| 1111 | Format(instr, "muhu 'rd, 'rs, 'rt"); |
| 1112 | } |
| 1113 | } |
| 1114 | break; |
| 1115 | case DIV: // @Mips32r6 == DIV_MOD. |
| 1116 | if (!IsMipsArchVariant(kMips32r6)) { |
| 1117 | Format(instr, "div 'rs, 'rt"); |
| 1118 | } else { |
| 1119 | if (instr->SaValue() == DIV_OP) { |
| 1120 | Format(instr, "div 'rd, 'rs, 'rt"); |
| 1121 | } else { |
| 1122 | Format(instr, "mod 'rd, 'rs, 'rt"); |
| 1123 | } |
| 1124 | } |
| 1125 | break; |
| 1126 | case DIVU: // @Mips32r6 == DIV_MOD_U. |
| 1127 | if (!IsMipsArchVariant(kMips32r6)) { |
| 1128 | Format(instr, "divu 'rs, 'rt"); |
| 1129 | } else { |
| 1130 | if (instr->SaValue() == DIV_OP) { |
| 1131 | Format(instr, "divu 'rd, 'rs, 'rt"); |
| 1132 | } else { |
| 1133 | Format(instr, "modu 'rd, 'rs, 'rt"); |
| 1134 | } |
| 1135 | } |
| 1136 | break; |
| 1137 | case ADD: |
| 1138 | Format(instr, "add 'rd, 'rs, 'rt"); |
| 1139 | break; |
| 1140 | case ADDU: |
| 1141 | Format(instr, "addu 'rd, 'rs, 'rt"); |
| 1142 | break; |
| 1143 | case SUB: |
| 1144 | Format(instr, "sub 'rd, 'rs, 'rt"); |
| 1145 | break; |
| 1146 | case SUBU: |
| 1147 | Format(instr, "subu 'rd, 'rs, 'rt"); |
| 1148 | break; |
| 1149 | case AND: |
| 1150 | Format(instr, "and 'rd, 'rs, 'rt"); |
| 1151 | break; |
| 1152 | case OR: |
| 1153 | if (0 == instr->RsValue()) { |
| 1154 | Format(instr, "mov 'rd, 'rt"); |
| 1155 | } else if (0 == instr->RtValue()) { |
| 1156 | Format(instr, "mov 'rd, 'rs"); |
| 1157 | } else { |
| 1158 | Format(instr, "or 'rd, 'rs, 'rt"); |
| 1159 | } |
| 1160 | break; |
| 1161 | case XOR: |
| 1162 | Format(instr, "xor 'rd, 'rs, 'rt"); |
| 1163 | break; |
| 1164 | case NOR: |
| 1165 | Format(instr, "nor 'rd, 'rs, 'rt"); |
| 1166 | break; |
| 1167 | case SLT: |
| 1168 | Format(instr, "slt 'rd, 'rs, 'rt"); |
| 1169 | break; |
| 1170 | case SLTU: |
| 1171 | Format(instr, "sltu 'rd, 'rs, 'rt"); |
| 1172 | break; |
| 1173 | case BREAK: |
| 1174 | Format(instr, "break, code: 'code"); |
| 1175 | break; |
| 1176 | case TGE: |
| 1177 | Format(instr, "tge 'rs, 'rt, code: 'code"); |
| 1178 | break; |
| 1179 | case TGEU: |
| 1180 | Format(instr, "tgeu 'rs, 'rt, code: 'code"); |
| 1181 | break; |
| 1182 | case TLT: |
| 1183 | Format(instr, "tlt 'rs, 'rt, code: 'code"); |
| 1184 | break; |
| 1185 | case TLTU: |
| 1186 | Format(instr, "tltu 'rs, 'rt, code: 'code"); |
| 1187 | break; |
| 1188 | case TEQ: |
| 1189 | Format(instr, "teq 'rs, 'rt, code: 'code"); |
| 1190 | break; |
| 1191 | case TNE: |
| 1192 | Format(instr, "tne 'rs, 'rt, code: 'code"); |
| 1193 | break; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1194 | case SYNC: |
| 1195 | Format(instr, "sync"); |
| 1196 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1197 | case MOVZ: |
| 1198 | Format(instr, "movz 'rd, 'rs, 'rt"); |
| 1199 | break; |
| 1200 | case MOVN: |
| 1201 | Format(instr, "movn 'rd, 'rs, 'rt"); |
| 1202 | break; |
| 1203 | case MOVCI: |
| 1204 | if (instr->Bit(16)) { |
| 1205 | Format(instr, "movt 'rd, 'rs, 'bc"); |
| 1206 | } else { |
| 1207 | Format(instr, "movf 'rd, 'rs, 'bc"); |
| 1208 | } |
| 1209 | break; |
| 1210 | case SELEQZ_S: |
| 1211 | Format(instr, "seleqz 'rd, 'rs, 'rt"); |
| 1212 | break; |
| 1213 | case SELNEZ_S: |
| 1214 | Format(instr, "selnez 'rd, 'rs, 'rt"); |
| 1215 | break; |
| 1216 | default: |
| 1217 | UNREACHABLE(); |
| 1218 | } |
| 1219 | } |
| 1220 | |
| 1221 | |
| 1222 | void Decoder::DecodeTypeRegisterSPECIAL2(Instruction* instr) { |
| 1223 | switch (instr->FunctionFieldRaw()) { |
| 1224 | case MUL: |
| 1225 | Format(instr, "mul 'rd, 'rs, 'rt"); |
| 1226 | break; |
| 1227 | case CLZ: |
| 1228 | if (!IsMipsArchVariant(kMips32r6)) { |
| 1229 | Format(instr, "clz 'rd, 'rs"); |
| 1230 | } |
| 1231 | break; |
| 1232 | default: |
| 1233 | UNREACHABLE(); |
| 1234 | } |
| 1235 | } |
| 1236 | |
| 1237 | |
| 1238 | void Decoder::DecodeTypeRegisterSPECIAL3(Instruction* instr) { |
| 1239 | switch (instr->FunctionFieldRaw()) { |
| 1240 | case INS: { |
| 1241 | if (IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6)) { |
| 1242 | Format(instr, "ins 'rt, 'rs, 'sa, 'ss2"); |
| 1243 | } else { |
| 1244 | Unknown(instr); |
| 1245 | } |
| 1246 | break; |
| 1247 | } |
| 1248 | case EXT: { |
| 1249 | if (IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6)) { |
| 1250 | Format(instr, "ext 'rt, 'rs, 'sa, 'ss1"); |
| 1251 | } else { |
| 1252 | Unknown(instr); |
| 1253 | } |
| 1254 | break; |
| 1255 | } |
| 1256 | case BSHFL: { |
| 1257 | int sa = instr->SaFieldRaw() >> kSaShift; |
| 1258 | switch (sa) { |
| 1259 | case BITSWAP: { |
| 1260 | if (IsMipsArchVariant(kMips32r6)) { |
| 1261 | Format(instr, "bitswap 'rd, 'rt"); |
| 1262 | } else { |
| 1263 | Unknown(instr); |
| 1264 | } |
| 1265 | break; |
| 1266 | } |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1267 | case SEB: { |
| 1268 | if (IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6)) { |
| 1269 | Format(instr, "seb 'rd, 'rt"); |
| 1270 | } else { |
| 1271 | Unknown(instr); |
| 1272 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1273 | break; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1274 | } |
| 1275 | case SEH: { |
| 1276 | if (IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6)) { |
| 1277 | Format(instr, "seh 'rd, 'rt"); |
| 1278 | } else { |
| 1279 | Unknown(instr); |
| 1280 | } |
| 1281 | break; |
| 1282 | } |
| 1283 | case WSBH: { |
| 1284 | if (IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6)) { |
| 1285 | Format(instr, "wsbh 'rd, 'rt"); |
| 1286 | } else { |
| 1287 | Unknown(instr); |
| 1288 | } |
| 1289 | break; |
| 1290 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1291 | default: { |
| 1292 | sa >>= kBp2Bits; |
| 1293 | switch (sa) { |
| 1294 | case ALIGN: { |
| 1295 | if (IsMipsArchVariant(kMips32r6)) { |
| 1296 | Format(instr, "align 'rd, 'rs, 'rt, 'bp2"); |
| 1297 | } else { |
| 1298 | Unknown(instr); |
| 1299 | } |
| 1300 | break; |
| 1301 | } |
| 1302 | default: |
| 1303 | UNREACHABLE(); |
| 1304 | break; |
| 1305 | } |
| 1306 | } |
| 1307 | } |
| 1308 | break; |
| 1309 | } |
| 1310 | default: |
| 1311 | UNREACHABLE(); |
| 1312 | } |
| 1313 | } |
| 1314 | |
| 1315 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1316 | void Decoder::DecodeTypeRegister(Instruction* instr) { |
| 1317 | switch (instr->OpcodeFieldRaw()) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1318 | case COP1: // Coprocessor instructions. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1319 | switch (instr->RsFieldRaw()) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1320 | case BC1: // bc1 handled in DecodeTypeImmediate. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1321 | UNREACHABLE(); |
| 1322 | break; |
| 1323 | case MFC1: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1324 | Format(instr, "mfc1 'rt, 'fs"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1325 | break; |
| 1326 | case MFHC1: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1327 | Format(instr, "mfhc1 'rt, 'fs"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1328 | break; |
| 1329 | case MTC1: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1330 | Format(instr, "mtc1 'rt, 'fs"); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1331 | break; |
| 1332 | // These are called "fs" too, although they are not FPU registers. |
| 1333 | case CTC1: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1334 | Format(instr, "ctc1 'rt, 'fs"); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1335 | break; |
| 1336 | case CFC1: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1337 | Format(instr, "cfc1 'rt, 'fs"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1338 | break; |
| 1339 | case MTHC1: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1340 | Format(instr, "mthc1 'rt, 'fs"); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1341 | break; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1342 | case S: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1343 | DecodeTypeRegisterSRsType(instr); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1344 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1345 | case D: |
| 1346 | DecodeTypeRegisterDRsType(instr); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1347 | break; |
| 1348 | case L: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1349 | DecodeTypeRegisterLRsType(instr); |
| 1350 | break; |
| 1351 | case W: |
| 1352 | DecodeTypeRegisterWRsType(instr); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1353 | break; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1354 | case PS: |
| 1355 | UNIMPLEMENTED_MIPS(); |
| 1356 | break; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1357 | default: |
| 1358 | UNREACHABLE(); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1359 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1360 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1361 | case COP1X: |
| 1362 | switch (instr->FunctionFieldRaw()) { |
| 1363 | case MADD_D: |
| 1364 | Format(instr, "madd.d 'fd, 'fr, 'fs, 'ft"); |
| 1365 | break; |
| 1366 | default: |
| 1367 | UNREACHABLE(); |
| 1368 | } |
| 1369 | break; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1370 | case SPECIAL: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1371 | DecodeTypeRegisterSPECIAL(instr); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1372 | break; |
| 1373 | case SPECIAL2: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1374 | DecodeTypeRegisterSPECIAL2(instr); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1375 | break; |
| 1376 | case SPECIAL3: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1377 | DecodeTypeRegisterSPECIAL3(instr); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1378 | break; |
| 1379 | default: |
| 1380 | UNREACHABLE(); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1381 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1382 | } |
| 1383 | |
| 1384 | |
| 1385 | void Decoder::DecodeTypeImmediate(Instruction* instr) { |
| 1386 | switch (instr->OpcodeFieldRaw()) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1387 | case COP1: |
| 1388 | switch (instr->RsFieldRaw()) { |
| 1389 | case BC1: |
| 1390 | if (instr->FBtrueValue()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1391 | Format(instr, "bc1t 'bc, 'imm16u -> 'imm16p4s2"); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1392 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1393 | Format(instr, "bc1f 'bc, 'imm16u -> 'imm16p4s2"); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1394 | } |
| 1395 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1396 | case BC1EQZ: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1397 | Format(instr, "bc1eqz 'ft, 'imm16u -> 'imm16p4s2"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1398 | break; |
| 1399 | case BC1NEZ: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1400 | Format(instr, "bc1nez 'ft, 'imm16u -> 'imm16p4s2"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1401 | break; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1402 | default: |
| 1403 | UNREACHABLE(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1404 | } |
| 1405 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1406 | break; // Case COP1. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1407 | // ------------- REGIMM class. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1408 | case REGIMM: |
| 1409 | switch (instr->RtFieldRaw()) { |
| 1410 | case BLTZ: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1411 | Format(instr, "bltz 'rs, 'imm16u -> 'imm16p4s2"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1412 | break; |
| 1413 | case BLTZAL: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1414 | Format(instr, "bltzal 'rs, 'imm16u -> 'imm16p4s2"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1415 | break; |
| 1416 | case BGEZ: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1417 | Format(instr, "bgez 'rs, 'imm16u -> 'imm16p4s2"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1418 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1419 | case BGEZAL: { |
| 1420 | if (instr->RsValue() == 0) |
| 1421 | Format(instr, "bal 'imm16s -> 'imm16p4s2"); |
| 1422 | else |
| 1423 | Format(instr, "bgezal 'rs, 'imm16u -> 'imm16p4s2"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1424 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1425 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1426 | case BGEZALL: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1427 | Format(instr, "bgezall 'rs, 'imm16u -> 'imm16p4s2"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1428 | break; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1429 | default: |
| 1430 | UNREACHABLE(); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1431 | } |
| 1432 | break; // Case REGIMM. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1433 | // ------------- Branch instructions. |
| 1434 | case BEQ: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1435 | Format(instr, "beq 'rs, 'rt, 'imm16u -> 'imm16p4s2"); |
| 1436 | break; |
| 1437 | case BC: |
| 1438 | Format(instr, "bc 'imm26s -> 'imm26p4s2"); |
| 1439 | break; |
| 1440 | case BALC: |
| 1441 | Format(instr, "balc 'imm26s -> 'imm26p4s2"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1442 | break; |
| 1443 | case BNE: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1444 | Format(instr, "bne 'rs, 'rt, 'imm16u -> 'imm16p4s2"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1445 | break; |
| 1446 | case BLEZ: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1447 | if ((instr->RtValue() == 0) && (instr->RsValue() != 0)) { |
| 1448 | Format(instr, "blez 'rs, 'imm16u -> 'imm16p4s2"); |
| 1449 | } else if ((instr->RtValue() != instr->RsValue()) && |
| 1450 | (instr->RsValue() != 0) && (instr->RtValue() != 0)) { |
| 1451 | Format(instr, "bgeuc 'rs, 'rt, 'imm16u -> 'imm16p4s2"); |
| 1452 | } else if ((instr->RtValue() == instr->RsValue()) && |
| 1453 | (instr->RtValue() != 0)) { |
| 1454 | Format(instr, "bgezalc 'rs, 'imm16u -> 'imm16p4s2"); |
| 1455 | } else if ((instr->RsValue() == 0) && (instr->RtValue() != 0)) { |
| 1456 | Format(instr, "blezalc 'rt, 'imm16u -> 'imm16p4s2"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1457 | } else { |
| 1458 | UNREACHABLE(); |
| 1459 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1460 | break; |
| 1461 | case BGTZ: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1462 | if ((instr->RtValue() == 0) && (instr->RsValue() != 0)) { |
| 1463 | Format(instr, "bgtz 'rs, 'imm16u -> 'imm16p4s2"); |
| 1464 | } else if ((instr->RtValue() != instr->RsValue()) && |
| 1465 | (instr->RsValue() != 0) && (instr->RtValue() != 0)) { |
| 1466 | Format(instr, "bltuc 'rs, 'rt, 'imm16u -> 'imm16p4s2"); |
| 1467 | } else if ((instr->RtValue() == instr->RsValue()) && |
| 1468 | (instr->RtValue() != 0)) { |
| 1469 | Format(instr, "bltzalc 'rt, 'imm16u -> 'imm16p4s2"); |
| 1470 | } else if ((instr->RsValue() == 0) && (instr->RtValue() != 0)) { |
| 1471 | Format(instr, "bgtzalc 'rt, 'imm16u -> 'imm16p4s2"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1472 | } else { |
| 1473 | UNREACHABLE(); |
| 1474 | } |
| 1475 | break; |
| 1476 | case BLEZL: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1477 | if ((instr->RtValue() == instr->RsValue()) && (instr->RtValue() != 0)) { |
| 1478 | Format(instr, "bgezc 'rt, 'imm16u -> 'imm16p4s2"); |
| 1479 | } else if ((instr->RtValue() != instr->RsValue()) && |
| 1480 | (instr->RsValue() != 0) && (instr->RtValue() != 0)) { |
| 1481 | Format(instr, "bgec 'rs, 'rt, 'imm16u -> 'imm16p4s2"); |
| 1482 | } else if ((instr->RsValue() == 0) && (instr->RtValue() != 0)) { |
| 1483 | Format(instr, "blezc 'rt, 'imm16u -> 'imm16p4s2"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1484 | } else { |
| 1485 | UNREACHABLE(); |
| 1486 | } |
| 1487 | break; |
| 1488 | case BGTZL: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1489 | if ((instr->RtValue() == instr->RsValue()) && (instr->RtValue() != 0)) { |
| 1490 | Format(instr, "bltzc 'rt, 'imm16u -> 'imm16p4s2"); |
| 1491 | } else if ((instr->RtValue() != instr->RsValue()) && |
| 1492 | (instr->RsValue() != 0) && (instr->RtValue() != 0)) { |
| 1493 | Format(instr, "bltc 'rs, 'rt, 'imm16u -> 'imm16p4s2"); |
| 1494 | } else if ((instr->RsValue() == 0) && (instr->RtValue() != 0)) { |
| 1495 | Format(instr, "bgtzc 'rt, 'imm16u -> 'imm16p4s2"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1496 | } else { |
| 1497 | UNREACHABLE(); |
| 1498 | } |
| 1499 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1500 | case POP66: |
| 1501 | if (instr->RsValue() == JIC) { |
| 1502 | Format(instr, "jic 'rt, 'imm16s"); |
| 1503 | } else { |
| 1504 | Format(instr, "beqzc 'rs, 'imm21s -> 'imm21p4s2"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1505 | } |
| 1506 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1507 | case POP76: |
| 1508 | if (instr->RsValue() == JIALC) { |
| 1509 | Format(instr, "jialc 'rt, 'imm16s"); |
| 1510 | } else { |
| 1511 | Format(instr, "bnezc 'rs, 'imm21s -> 'imm21p4s2"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1512 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1513 | break; |
| 1514 | // ------------- Arithmetic instructions. |
| 1515 | case ADDI: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1516 | if (!IsMipsArchVariant(kMips32r6)) { |
| 1517 | Format(instr, "addi 'rt, 'rs, 'imm16s"); |
| 1518 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1519 | int rs_reg = instr->RsValue(); |
| 1520 | int rt_reg = instr->RtValue(); |
| 1521 | // Check if BOVC, BEQZALC or BEQC instruction. |
| 1522 | if (rs_reg >= rt_reg) { |
| 1523 | Format(instr, "bovc 'rs, 'rt, 'imm16s -> 'imm16p4s2"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1524 | } else { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1525 | DCHECK(rt_reg > 0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1526 | if (rs_reg == 0) { |
| 1527 | Format(instr, "beqzalc 'rt, 'imm16s -> 'imm16p4s2"); |
| 1528 | } else { |
| 1529 | Format(instr, "beqc 'rs, 'rt, 'imm16s -> 'imm16p4s2"); |
| 1530 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1531 | } |
| 1532 | } |
| 1533 | break; |
| 1534 | case DADDI: |
| 1535 | if (IsMipsArchVariant(kMips32r6)) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1536 | int rs_reg = instr->RsValue(); |
| 1537 | int rt_reg = instr->RtValue(); |
| 1538 | // Check if BNVC, BNEZALC or BNEC instruction. |
| 1539 | if (rs_reg >= rt_reg) { |
| 1540 | Format(instr, "bnvc 'rs, 'rt, 'imm16s -> 'imm16p4s2"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1541 | } else { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1542 | DCHECK(rt_reg > 0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1543 | if (rs_reg == 0) { |
| 1544 | Format(instr, "bnezalc 'rt, 'imm16s -> 'imm16p4s2"); |
| 1545 | } else { |
| 1546 | Format(instr, "bnec 'rs, 'rt, 'imm16s -> 'imm16p4s2"); |
| 1547 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1548 | } |
| 1549 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1550 | break; |
| 1551 | case ADDIU: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1552 | Format(instr, "addiu 'rt, 'rs, 'imm16s"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1553 | break; |
| 1554 | case SLTI: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1555 | Format(instr, "slti 'rt, 'rs, 'imm16s"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1556 | break; |
| 1557 | case SLTIU: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1558 | Format(instr, "sltiu 'rt, 'rs, 'imm16u"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1559 | break; |
| 1560 | case ANDI: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1561 | Format(instr, "andi 'rt, 'rs, 'imm16x"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1562 | break; |
| 1563 | case ORI: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1564 | Format(instr, "ori 'rt, 'rs, 'imm16x"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1565 | break; |
| 1566 | case XORI: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1567 | Format(instr, "xori 'rt, 'rs, 'imm16x"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1568 | break; |
| 1569 | case LUI: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1570 | if (!IsMipsArchVariant(kMips32r6)) { |
| 1571 | Format(instr, "lui 'rt, 'imm16x"); |
| 1572 | } else { |
| 1573 | if (instr->RsValue() != 0) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1574 | Format(instr, "aui 'rt, 'rs, 'imm16x"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1575 | } else { |
| 1576 | Format(instr, "lui 'rt, 'imm16x"); |
| 1577 | } |
| 1578 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1579 | break; |
| 1580 | // ------------- Memory instructions. |
| 1581 | case LB: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1582 | Format(instr, "lb 'rt, 'imm16s('rs)"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1583 | break; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1584 | case LH: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1585 | Format(instr, "lh 'rt, 'imm16s('rs)"); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1586 | break; |
| 1587 | case LWL: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1588 | Format(instr, "lwl 'rt, 'imm16s('rs)"); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1589 | break; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1590 | case LW: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1591 | Format(instr, "lw 'rt, 'imm16s('rs)"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1592 | break; |
| 1593 | case LBU: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1594 | Format(instr, "lbu 'rt, 'imm16s('rs)"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1595 | break; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1596 | case LHU: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1597 | Format(instr, "lhu 'rt, 'imm16s('rs)"); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1598 | break; |
| 1599 | case LWR: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1600 | Format(instr, "lwr 'rt, 'imm16s('rs)"); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1601 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1602 | case PREF: |
| 1603 | Format(instr, "pref 'rt, 'imm16s('rs)"); |
| 1604 | break; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1605 | case SB: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1606 | Format(instr, "sb 'rt, 'imm16s('rs)"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1607 | break; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1608 | case SH: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1609 | Format(instr, "sh 'rt, 'imm16s('rs)"); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1610 | break; |
| 1611 | case SWL: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1612 | Format(instr, "swl 'rt, 'imm16s('rs)"); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1613 | break; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1614 | case SW: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1615 | Format(instr, "sw 'rt, 'imm16s('rs)"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1616 | break; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1617 | case SWR: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1618 | Format(instr, "swr 'rt, 'imm16s('rs)"); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1619 | break; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1620 | case LWC1: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1621 | Format(instr, "lwc1 'ft, 'imm16s('rs)"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1622 | break; |
| 1623 | case LDC1: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1624 | Format(instr, "ldc1 'ft, 'imm16s('rs)"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1625 | break; |
| 1626 | case SWC1: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1627 | Format(instr, "swc1 'ft, 'imm16s('rs)"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1628 | break; |
| 1629 | case SDC1: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1630 | Format(instr, "sdc1 'ft, 'imm16s('rs)"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1631 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1632 | case PCREL: { |
| 1633 | int32_t imm21 = instr->Imm21Value(); |
| 1634 | // rt field: 5-bits checking |
| 1635 | uint8_t rt = (imm21 >> kImm16Bits); |
| 1636 | switch (rt) { |
| 1637 | case ALUIPC: |
| 1638 | Format(instr, "aluipc 'rs, 'imm16s"); |
| 1639 | break; |
| 1640 | case AUIPC: |
| 1641 | Format(instr, "auipc 'rs, 'imm16s"); |
| 1642 | break; |
| 1643 | default: { |
| 1644 | // rt field: checking of the most significant 2-bits |
| 1645 | rt = (imm21 >> kImm19Bits); |
| 1646 | switch (rt) { |
| 1647 | case LWPC: |
| 1648 | Format(instr, "lwpc 'rs, 'imm19s"); |
| 1649 | break; |
| 1650 | case ADDIUPC: |
| 1651 | Format(instr, "addiupc 'rs, 'imm19s"); |
| 1652 | break; |
| 1653 | default: |
| 1654 | UNREACHABLE(); |
| 1655 | break; |
| 1656 | } |
| 1657 | } |
| 1658 | } |
| 1659 | break; |
| 1660 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1661 | default: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1662 | printf("a 0x%x \n", instr->OpcodeFieldRaw()); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1663 | UNREACHABLE(); |
| 1664 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1665 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1666 | } |
| 1667 | |
| 1668 | |
| 1669 | void Decoder::DecodeTypeJump(Instruction* instr) { |
| 1670 | switch (instr->OpcodeFieldRaw()) { |
| 1671 | case J: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1672 | Format(instr, "j 'imm26x -> 'imm26j"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1673 | break; |
| 1674 | case JAL: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1675 | Format(instr, "jal 'imm26x -> 'imm26j"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1676 | break; |
| 1677 | default: |
| 1678 | UNREACHABLE(); |
| 1679 | } |
| 1680 | } |
| 1681 | |
| 1682 | |
| 1683 | // Disassemble the instruction at *instr_ptr into the output buffer. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1684 | int Decoder::InstructionDecode(byte* instr_ptr) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1685 | Instruction* instr = Instruction::At(instr_ptr); |
| 1686 | // Print raw instruction bytes. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1687 | out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, |
| 1688 | "%08x ", |
| 1689 | instr->InstructionBits()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1690 | switch (instr->InstructionType(Instruction::EXTRA)) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1691 | case Instruction::kRegisterType: { |
| 1692 | DecodeTypeRegister(instr); |
| 1693 | break; |
| 1694 | } |
| 1695 | case Instruction::kImmediateType: { |
| 1696 | DecodeTypeImmediate(instr); |
| 1697 | break; |
| 1698 | } |
| 1699 | case Instruction::kJumpType: { |
| 1700 | DecodeTypeJump(instr); |
| 1701 | break; |
| 1702 | } |
| 1703 | default: { |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1704 | Format(instr, "UNSUPPORTED"); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1705 | UNSUPPORTED_MIPS(); |
| 1706 | } |
| 1707 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1708 | return Instruction::kInstrSize; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1709 | } |
| 1710 | |
| 1711 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1712 | } // namespace internal |
| 1713 | } // namespace v8 |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1714 | |
| 1715 | |
| 1716 | //------------------------------------------------------------------------------ |
| 1717 | |
| 1718 | namespace disasm { |
| 1719 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1720 | const char* NameConverter::NameOfAddress(byte* addr) const { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1721 | v8::internal::SNPrintF(tmp_buffer_, "%p", static_cast<void*>(addr)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1722 | return tmp_buffer_.start(); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1723 | } |
| 1724 | |
| 1725 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1726 | const char* NameConverter::NameOfConstant(byte* addr) const { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1727 | return NameOfAddress(addr); |
| 1728 | } |
| 1729 | |
| 1730 | |
| 1731 | const char* NameConverter::NameOfCPURegister(int reg) const { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1732 | return v8::internal::Registers::Name(reg); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1733 | } |
| 1734 | |
| 1735 | |
| 1736 | const char* NameConverter::NameOfXMMRegister(int reg) const { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1737 | return v8::internal::FPURegisters::Name(reg); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1738 | } |
| 1739 | |
| 1740 | |
| 1741 | const char* NameConverter::NameOfByteCPURegister(int reg) const { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1742 | UNREACHABLE(); // MIPS does not have the concept of a byte register. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1743 | return "nobytereg"; |
| 1744 | } |
| 1745 | |
| 1746 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1747 | const char* NameConverter::NameInCode(byte* addr) const { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1748 | // The default name converter is called for unknown code. So we will not try |
| 1749 | // to access any memory. |
| 1750 | return ""; |
| 1751 | } |
| 1752 | |
| 1753 | |
| 1754 | //------------------------------------------------------------------------------ |
| 1755 | |
| 1756 | Disassembler::Disassembler(const NameConverter& converter) |
| 1757 | : converter_(converter) {} |
| 1758 | |
| 1759 | |
| 1760 | Disassembler::~Disassembler() {} |
| 1761 | |
| 1762 | |
| 1763 | int Disassembler::InstructionDecode(v8::internal::Vector<char> buffer, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1764 | byte* instruction) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1765 | v8::internal::Decoder d(converter_, buffer); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1766 | return d.InstructionDecode(instruction); |
| 1767 | } |
| 1768 | |
| 1769 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1770 | // The MIPS assembler does not currently use constant pools. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1771 | int Disassembler::ConstantPoolSizeAt(byte* instruction) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1772 | return -1; |
| 1773 | } |
| 1774 | |
| 1775 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1776 | void Disassembler::Disassemble(FILE* f, byte* begin, byte* end) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1777 | NameConverter converter; |
| 1778 | Disassembler d(converter); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1779 | for (byte* pc = begin; pc < end;) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1780 | v8::internal::EmbeddedVector<char, 128> buffer; |
| 1781 | buffer[0] = '\0'; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1782 | byte* prev_pc = pc; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1783 | pc += d.InstructionDecode(buffer, pc); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1784 | v8::internal::PrintF(f, "%p %08x %s\n", static_cast<void*>(prev_pc), |
| 1785 | *reinterpret_cast<int32_t*>(prev_pc), buffer.start()); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1786 | } |
| 1787 | } |
| 1788 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1789 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1790 | #undef UNSUPPORTED |
| 1791 | |
| 1792 | } // namespace disasm |
| 1793 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 1794 | #endif // V8_TARGET_ARCH_MIPS |