mstarzinger@chromium.org | 3233d2f | 2012-03-14 11:16:03 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | // A Disassembler object is used to disassemble a block of code instruction by |
| 29 | // instruction. The default implementation of the NameConverter object can be |
| 30 | // overriden to modify register names or to do symbol lookup on addresses. |
| 31 | // |
| 32 | // The example below will disassemble a block of code and print it to stdout. |
| 33 | // |
| 34 | // NameConverter converter; |
| 35 | // Disassembler d(converter); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 36 | // for (byte* pc = begin; pc < end;) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 37 | // v8::internal::EmbeddedVector<char, 256> buffer; |
| 38 | // byte* prev_pc = pc; |
| 39 | // pc += d.InstructionDecode(buffer, pc); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 40 | // printf("%p %08x %s\n", |
| 41 | // prev_pc, *reinterpret_cast<int32_t*>(prev_pc), buffer); |
| 42 | // } |
| 43 | // |
| 44 | // The Disassembler class also has a convenience method to disassemble a block |
| 45 | // of code into a FILE*, meaning that the above functionality could also be |
| 46 | // achieved by just calling Disassembler::Disassemble(stdout, begin, end); |
| 47 | |
| 48 | |
| 49 | #include <assert.h> |
| 50 | #include <stdio.h> |
| 51 | #include <stdarg.h> |
| 52 | #include <string.h> |
| 53 | #ifndef WIN32 |
| 54 | #include <stdint.h> |
| 55 | #endif |
| 56 | |
| 57 | #include "v8.h" |
| 58 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 59 | #if defined(V8_TARGET_ARCH_MIPS) |
| 60 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 61 | #include "mips/constants-mips.h" |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 62 | #include "disasm.h" |
| 63 | #include "macro-assembler.h" |
| 64 | #include "platform.h" |
| 65 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 66 | namespace v8 { |
| 67 | namespace internal { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 68 | |
| 69 | //------------------------------------------------------------------------------ |
| 70 | |
| 71 | // Decoder decodes and disassembles instructions into an output buffer. |
| 72 | // It uses the converter to convert register names and call destinations into |
| 73 | // more informative description. |
| 74 | class Decoder { |
| 75 | public: |
| 76 | Decoder(const disasm::NameConverter& converter, |
| 77 | v8::internal::Vector<char> out_buffer) |
| 78 | : converter_(converter), |
| 79 | out_buffer_(out_buffer), |
| 80 | out_buffer_pos_(0) { |
| 81 | out_buffer_[out_buffer_pos_] = '\0'; |
| 82 | } |
| 83 | |
| 84 | ~Decoder() {} |
| 85 | |
| 86 | // Writes one disassembled instruction into 'buffer' (0-terminated). |
| 87 | // Returns the length of the disassembled machine instruction in bytes. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 88 | int InstructionDecode(byte* instruction); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 89 | |
| 90 | private: |
| 91 | // Bottleneck functions to print into the out_buffer. |
| 92 | void PrintChar(const char ch); |
| 93 | void Print(const char* str); |
| 94 | |
| 95 | // Printing of common values. |
| 96 | void PrintRegister(int reg); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 97 | void PrintFPURegister(int freg); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 98 | void PrintRs(Instruction* instr); |
| 99 | void PrintRt(Instruction* instr); |
| 100 | void PrintRd(Instruction* instr); |
| 101 | void PrintFs(Instruction* instr); |
| 102 | void PrintFt(Instruction* instr); |
| 103 | void PrintFd(Instruction* instr); |
| 104 | void PrintSa(Instruction* instr); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 105 | void PrintSd(Instruction* instr); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 106 | void PrintSs1(Instruction* instr); |
| 107 | void PrintSs2(Instruction* instr); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 108 | void PrintBc(Instruction* instr); |
| 109 | void PrintCc(Instruction* instr); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 110 | void PrintFunction(Instruction* instr); |
| 111 | void PrintSecondaryField(Instruction* instr); |
| 112 | void PrintUImm16(Instruction* instr); |
| 113 | void PrintSImm16(Instruction* instr); |
| 114 | void PrintXImm16(Instruction* instr); |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 115 | void PrintXImm26(Instruction* instr); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 116 | void PrintCode(Instruction* instr); // For break and trap instructions. |
| 117 | // Printing of instruction name. |
| 118 | void PrintInstructionName(Instruction* instr); |
| 119 | |
| 120 | // Handle formatting of instructions and their options. |
| 121 | int FormatRegister(Instruction* instr, const char* option); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 122 | int FormatFPURegister(Instruction* instr, const char* option); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 123 | int FormatOption(Instruction* instr, const char* option); |
| 124 | void Format(Instruction* instr, const char* format); |
| 125 | void Unknown(Instruction* instr); |
| 126 | |
| 127 | // Each of these functions decodes one particular instruction type. |
| 128 | void DecodeTypeRegister(Instruction* instr); |
| 129 | void DecodeTypeImmediate(Instruction* instr); |
| 130 | void DecodeTypeJump(Instruction* instr); |
| 131 | |
| 132 | const disasm::NameConverter& converter_; |
| 133 | v8::internal::Vector<char> out_buffer_; |
| 134 | int out_buffer_pos_; |
| 135 | |
| 136 | DISALLOW_COPY_AND_ASSIGN(Decoder); |
| 137 | }; |
| 138 | |
| 139 | |
| 140 | // Support for assertions in the Decoder formatting functions. |
| 141 | #define STRING_STARTS_WITH(string, compare_string) \ |
| 142 | (strncmp(string, compare_string, strlen(compare_string)) == 0) |
| 143 | |
| 144 | |
| 145 | // Append the ch to the output buffer. |
| 146 | void Decoder::PrintChar(const char ch) { |
| 147 | out_buffer_[out_buffer_pos_++] = ch; |
| 148 | } |
| 149 | |
| 150 | |
| 151 | // Append the str to the output buffer. |
| 152 | void Decoder::Print(const char* str) { |
| 153 | char cur = *str++; |
| 154 | while (cur != '\0' && (out_buffer_pos_ < (out_buffer_.length() - 1))) { |
| 155 | PrintChar(cur); |
| 156 | cur = *str++; |
| 157 | } |
| 158 | out_buffer_[out_buffer_pos_] = 0; |
| 159 | } |
| 160 | |
| 161 | |
| 162 | // Print the register name according to the active name converter. |
| 163 | void Decoder::PrintRegister(int reg) { |
| 164 | Print(converter_.NameOfCPURegister(reg)); |
| 165 | } |
| 166 | |
| 167 | |
| 168 | void Decoder::PrintRs(Instruction* instr) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 169 | int reg = instr->RsValue(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 170 | PrintRegister(reg); |
| 171 | } |
| 172 | |
| 173 | |
| 174 | void Decoder::PrintRt(Instruction* instr) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 175 | int reg = instr->RtValue(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 176 | PrintRegister(reg); |
| 177 | } |
| 178 | |
| 179 | |
| 180 | void Decoder::PrintRd(Instruction* instr) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 181 | int reg = instr->RdValue(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 182 | PrintRegister(reg); |
| 183 | } |
| 184 | |
| 185 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 186 | // Print the FPUregister name according to the active name converter. |
| 187 | void Decoder::PrintFPURegister(int freg) { |
| 188 | Print(converter_.NameOfXMMRegister(freg)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 189 | } |
| 190 | |
| 191 | |
| 192 | void Decoder::PrintFs(Instruction* instr) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 193 | int freg = instr->RsValue(); |
| 194 | PrintFPURegister(freg); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | |
| 198 | void Decoder::PrintFt(Instruction* instr) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 199 | int freg = instr->RtValue(); |
| 200 | PrintFPURegister(freg); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 201 | } |
| 202 | |
| 203 | |
| 204 | void Decoder::PrintFd(Instruction* instr) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 205 | int freg = instr->RdValue(); |
| 206 | PrintFPURegister(freg); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 207 | } |
| 208 | |
| 209 | |
| 210 | // Print the integer value of the sa field. |
| 211 | void Decoder::PrintSa(Instruction* instr) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 212 | int sa = instr->SaValue(); |
| 213 | out_buffer_pos_ += OS::SNPrintF(out_buffer_ + out_buffer_pos_, "%d", sa); |
| 214 | } |
| 215 | |
| 216 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 217 | // Print the integer value of the rd field, when it is not used as reg. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 218 | void Decoder::PrintSd(Instruction* instr) { |
| 219 | int sd = instr->RdValue(); |
| 220 | out_buffer_pos_ += OS::SNPrintF(out_buffer_ + out_buffer_pos_, "%d", sd); |
| 221 | } |
| 222 | |
| 223 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 224 | // Print the integer value of the rd field, when used as 'ext' size. |
| 225 | void Decoder::PrintSs1(Instruction* instr) { |
| 226 | int ss = instr->RdValue(); |
| 227 | out_buffer_pos_ += OS::SNPrintF(out_buffer_ + out_buffer_pos_, "%d", ss + 1); |
| 228 | } |
| 229 | |
| 230 | |
| 231 | // Print the integer value of the rd field, when used as 'ins' size. |
| 232 | void Decoder::PrintSs2(Instruction* instr) { |
| 233 | int ss = instr->RdValue(); |
| 234 | int pos = instr->SaValue(); |
| 235 | out_buffer_pos_ += |
| 236 | OS::SNPrintF(out_buffer_ + out_buffer_pos_, "%d", ss - pos + 1); |
| 237 | } |
| 238 | |
| 239 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 240 | // Print the integer value of the cc field for the bc1t/f instructions. |
| 241 | void Decoder::PrintBc(Instruction* instr) { |
| 242 | int cc = instr->FBccValue(); |
| 243 | out_buffer_pos_ += OS::SNPrintF(out_buffer_ + out_buffer_pos_, "%d", cc); |
| 244 | } |
| 245 | |
| 246 | |
| 247 | // Print the integer value of the cc field for the FP compare instructions. |
| 248 | void Decoder::PrintCc(Instruction* instr) { |
| 249 | int cc = instr->FCccValue(); |
| 250 | out_buffer_pos_ += OS::SNPrintF(out_buffer_ + out_buffer_pos_, "cc(%d)", cc); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 251 | } |
| 252 | |
| 253 | |
| 254 | // Print 16-bit unsigned immediate value. |
| 255 | void Decoder::PrintUImm16(Instruction* instr) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 256 | int32_t imm = instr->Imm16Value(); |
| 257 | out_buffer_pos_ += OS::SNPrintF(out_buffer_ + out_buffer_pos_, "%u", imm); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | |
| 261 | // Print 16-bit signed immediate value. |
| 262 | void Decoder::PrintSImm16(Instruction* instr) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 263 | int32_t imm = ((instr->Imm16Value()) << 16) >> 16; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 264 | out_buffer_pos_ += OS::SNPrintF(out_buffer_ + out_buffer_pos_, "%d", imm); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | |
| 268 | // Print 16-bit hexa immediate value. |
| 269 | void Decoder::PrintXImm16(Instruction* instr) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 270 | int32_t imm = instr->Imm16Value(); |
| 271 | out_buffer_pos_ += OS::SNPrintF(out_buffer_ + out_buffer_pos_, "0x%x", imm); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 272 | } |
| 273 | |
| 274 | |
| 275 | // Print 26-bit immediate value. |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 276 | void Decoder::PrintXImm26(Instruction* instr) { |
| 277 | uint32_t imm = instr->Imm26Value() << kImmFieldShift; |
| 278 | out_buffer_pos_ += OS::SNPrintF(out_buffer_ + out_buffer_pos_, "0x%x", imm); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 279 | } |
| 280 | |
| 281 | |
| 282 | // Print 26-bit immediate value. |
| 283 | void Decoder::PrintCode(Instruction* instr) { |
| 284 | if (instr->OpcodeFieldRaw() != SPECIAL) |
| 285 | return; // Not a break or trap instruction. |
| 286 | switch (instr->FunctionFieldRaw()) { |
| 287 | case BREAK: { |
| 288 | int32_t code = instr->Bits(25, 6); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 289 | out_buffer_pos_ += OS::SNPrintF(out_buffer_ + out_buffer_pos_, |
| 290 | "0x%05x (%d)", code, code); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 291 | break; |
| 292 | } |
| 293 | case TGE: |
| 294 | case TGEU: |
| 295 | case TLT: |
| 296 | case TLTU: |
| 297 | case TEQ: |
| 298 | case TNE: { |
| 299 | int32_t code = instr->Bits(15, 6); |
| 300 | out_buffer_pos_ += |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 301 | OS::SNPrintF(out_buffer_ + out_buffer_pos_, "0x%03x", code); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 302 | break; |
| 303 | } |
| 304 | default: // Not a break or trap instruction. |
| 305 | break; |
| 306 | }; |
| 307 | } |
| 308 | |
| 309 | |
| 310 | // Printing of instruction name. |
| 311 | void Decoder::PrintInstructionName(Instruction* instr) { |
| 312 | } |
| 313 | |
| 314 | |
| 315 | // Handle all register based formatting in this function to reduce the |
| 316 | // complexity of FormatOption. |
| 317 | int Decoder::FormatRegister(Instruction* instr, const char* format) { |
| 318 | ASSERT(format[0] == 'r'); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 319 | if (format[1] == 's') { // 'rs: Rs register. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 320 | int reg = instr->RsValue(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 321 | PrintRegister(reg); |
| 322 | return 2; |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 323 | } else if (format[1] == 't') { // 'rt: rt register. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 324 | int reg = instr->RtValue(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 325 | PrintRegister(reg); |
| 326 | return 2; |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 327 | } else if (format[1] == 'd') { // 'rd: rd register. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 328 | int reg = instr->RdValue(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 329 | PrintRegister(reg); |
| 330 | return 2; |
| 331 | } |
| 332 | UNREACHABLE(); |
| 333 | return -1; |
| 334 | } |
| 335 | |
| 336 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 337 | // Handle all FPUregister based formatting in this function to reduce the |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 338 | // complexity of FormatOption. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 339 | int Decoder::FormatFPURegister(Instruction* instr, const char* format) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 340 | ASSERT(format[0] == 'f'); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 341 | if (format[1] == 's') { // 'fs: fs register. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 342 | int reg = instr->FsValue(); |
| 343 | PrintFPURegister(reg); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 344 | return 2; |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 345 | } else if (format[1] == 't') { // 'ft: ft register. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 346 | int reg = instr->FtValue(); |
| 347 | PrintFPURegister(reg); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 348 | return 2; |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 349 | } else if (format[1] == 'd') { // 'fd: fd register. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 350 | int reg = instr->FdValue(); |
| 351 | PrintFPURegister(reg); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 352 | return 2; |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 353 | } else if (format[1] == 'r') { // 'fr: fr register. |
| 354 | int reg = instr->FrValue(); |
| 355 | PrintFPURegister(reg); |
| 356 | return 2; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 357 | } |
| 358 | UNREACHABLE(); |
| 359 | return -1; |
| 360 | } |
| 361 | |
| 362 | |
| 363 | // FormatOption takes a formatting string and interprets it based on |
| 364 | // the current instructions. The format string points to the first |
| 365 | // character of the option string (the option escape has already been |
| 366 | // consumed by the caller.) FormatOption returns the number of |
| 367 | // characters that were consumed from the formatting string. |
| 368 | int Decoder::FormatOption(Instruction* instr, const char* format) { |
| 369 | switch (format[0]) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 370 | case 'c': { // 'code for break or trap instructions. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 371 | ASSERT(STRING_STARTS_WITH(format, "code")); |
| 372 | PrintCode(instr); |
| 373 | return 4; |
| 374 | } |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 375 | case 'i': { // 'imm16u or 'imm26. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 376 | if (format[3] == '1') { |
| 377 | ASSERT(STRING_STARTS_WITH(format, "imm16")); |
| 378 | if (format[5] == 's') { |
| 379 | ASSERT(STRING_STARTS_WITH(format, "imm16s")); |
| 380 | PrintSImm16(instr); |
| 381 | } else if (format[5] == 'u') { |
| 382 | ASSERT(STRING_STARTS_WITH(format, "imm16u")); |
| 383 | PrintSImm16(instr); |
| 384 | } else { |
| 385 | ASSERT(STRING_STARTS_WITH(format, "imm16x")); |
| 386 | PrintXImm16(instr); |
| 387 | } |
| 388 | return 6; |
| 389 | } else { |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 390 | ASSERT(STRING_STARTS_WITH(format, "imm26x")); |
| 391 | PrintXImm26(instr); |
| 392 | return 6; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 393 | } |
| 394 | } |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 395 | case 'r': { // 'r: registers. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 396 | return FormatRegister(instr, format); |
| 397 | } |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 398 | case 'f': { // 'f: FPUregisters. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 399 | return FormatFPURegister(instr, format); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 400 | } |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 401 | case 's': { // 'sa. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 402 | switch (format[1]) { |
| 403 | case 'a': { |
| 404 | ASSERT(STRING_STARTS_WITH(format, "sa")); |
| 405 | PrintSa(instr); |
| 406 | return 2; |
| 407 | } |
| 408 | case 'd': { |
| 409 | ASSERT(STRING_STARTS_WITH(format, "sd")); |
| 410 | PrintSd(instr); |
| 411 | return 2; |
| 412 | } |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 413 | case 's': { |
| 414 | if (format[2] == '1') { |
| 415 | ASSERT(STRING_STARTS_WITH(format, "ss1")); /* ext size */ |
| 416 | PrintSs1(instr); |
| 417 | return 3; |
| 418 | } else { |
| 419 | ASSERT(STRING_STARTS_WITH(format, "ss2")); /* ins size */ |
| 420 | PrintSs2(instr); |
| 421 | return 3; |
| 422 | } |
| 423 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 424 | } |
| 425 | } |
| 426 | case 'b': { // 'bc - Special for bc1 cc field. |
| 427 | ASSERT(STRING_STARTS_WITH(format, "bc")); |
| 428 | PrintBc(instr); |
| 429 | return 2; |
| 430 | } |
| 431 | case 'C': { // 'Cc - Special for c.xx.d cc field. |
| 432 | ASSERT(STRING_STARTS_WITH(format, "Cc")); |
| 433 | PrintCc(instr); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 434 | return 2; |
| 435 | } |
| 436 | }; |
| 437 | UNREACHABLE(); |
| 438 | return -1; |
| 439 | } |
| 440 | |
| 441 | |
| 442 | // Format takes a formatting string for a whole instruction and prints it into |
| 443 | // the output buffer. All escaped options are handed to FormatOption to be |
| 444 | // parsed further. |
| 445 | void Decoder::Format(Instruction* instr, const char* format) { |
| 446 | char cur = *format++; |
| 447 | while ((cur != 0) && (out_buffer_pos_ < (out_buffer_.length() - 1))) { |
| 448 | if (cur == '\'') { // Single quote is used as the formatting escape. |
| 449 | format += FormatOption(instr, format); |
| 450 | } else { |
| 451 | out_buffer_[out_buffer_pos_++] = cur; |
| 452 | } |
| 453 | cur = *format++; |
| 454 | } |
| 455 | out_buffer_[out_buffer_pos_] = '\0'; |
| 456 | } |
| 457 | |
| 458 | |
| 459 | // For currently unimplemented decodings the disassembler calls Unknown(instr) |
| 460 | // which will just print "unknown" of the instruction bits. |
| 461 | void Decoder::Unknown(Instruction* instr) { |
| 462 | Format(instr, "unknown"); |
| 463 | } |
| 464 | |
| 465 | |
| 466 | void Decoder::DecodeTypeRegister(Instruction* instr) { |
| 467 | switch (instr->OpcodeFieldRaw()) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 468 | case COP1: // Coprocessor instructions. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 469 | switch (instr->RsFieldRaw()) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 470 | case BC1: // bc1 handled in DecodeTypeImmediate. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 471 | UNREACHABLE(); |
| 472 | break; |
| 473 | case MFC1: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 474 | Format(instr, "mfc1 'rt, 'fs"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 475 | break; |
| 476 | case MFHC1: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 477 | Format(instr, "mfhc1 'rt, 'fs"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 478 | break; |
| 479 | case MTC1: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 480 | Format(instr, "mtc1 'rt, 'fs"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 481 | break; |
| 482 | // These are called "fs" too, although they are not FPU registers. |
| 483 | case CTC1: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 484 | Format(instr, "ctc1 'rt, 'fs"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 485 | break; |
| 486 | case CFC1: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 487 | Format(instr, "cfc1 'rt, 'fs"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 488 | break; |
| 489 | case MTHC1: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 490 | Format(instr, "mthc1 'rt, 'fs"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 491 | break; |
| 492 | case D: |
| 493 | switch (instr->FunctionFieldRaw()) { |
| 494 | case ADD_D: |
| 495 | Format(instr, "add.d 'fd, 'fs, 'ft"); |
| 496 | break; |
| 497 | case SUB_D: |
| 498 | Format(instr, "sub.d 'fd, 'fs, 'ft"); |
| 499 | break; |
| 500 | case MUL_D: |
| 501 | Format(instr, "mul.d 'fd, 'fs, 'ft"); |
| 502 | break; |
| 503 | case DIV_D: |
| 504 | Format(instr, "div.d 'fd, 'fs, 'ft"); |
| 505 | break; |
| 506 | case ABS_D: |
| 507 | Format(instr, "abs.d 'fd, 'fs"); |
| 508 | break; |
| 509 | case MOV_D: |
| 510 | Format(instr, "mov.d 'fd, 'fs"); |
| 511 | break; |
| 512 | case NEG_D: |
| 513 | Format(instr, "neg.d 'fd, 'fs"); |
| 514 | break; |
| 515 | case SQRT_D: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 516 | Format(instr, "sqrt.d 'fd, 'fs"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 517 | break; |
| 518 | case CVT_W_D: |
| 519 | Format(instr, "cvt.w.d 'fd, 'fs"); |
| 520 | break; |
| 521 | case CVT_L_D: { |
mstarzinger@chromium.org | 3233d2f | 2012-03-14 11:16:03 +0000 | [diff] [blame] | 522 | if (kArchVariant == kMips32r2) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 523 | Format(instr, "cvt.l.d 'fd, 'fs"); |
| 524 | } else { |
| 525 | Unknown(instr); |
| 526 | } |
| 527 | break; |
| 528 | } |
| 529 | case TRUNC_W_D: |
| 530 | Format(instr, "trunc.w.d 'fd, 'fs"); |
| 531 | break; |
| 532 | case TRUNC_L_D: { |
mstarzinger@chromium.org | 3233d2f | 2012-03-14 11:16:03 +0000 | [diff] [blame] | 533 | if (kArchVariant == kMips32r2) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 534 | Format(instr, "trunc.l.d 'fd, 'fs"); |
| 535 | } else { |
| 536 | Unknown(instr); |
| 537 | } |
| 538 | break; |
| 539 | } |
| 540 | case ROUND_W_D: |
| 541 | Format(instr, "round.w.d 'fd, 'fs"); |
| 542 | break; |
| 543 | case FLOOR_W_D: |
| 544 | Format(instr, "floor.w.d 'fd, 'fs"); |
| 545 | break; |
| 546 | case CEIL_W_D: |
| 547 | Format(instr, "ceil.w.d 'fd, 'fs"); |
| 548 | break; |
| 549 | case CVT_S_D: |
| 550 | Format(instr, "cvt.s.d 'fd, 'fs"); |
| 551 | break; |
| 552 | case C_F_D: |
| 553 | Format(instr, "c.f.d 'fs, 'ft, 'Cc"); |
| 554 | break; |
| 555 | case C_UN_D: |
| 556 | Format(instr, "c.un.d 'fs, 'ft, 'Cc"); |
| 557 | break; |
| 558 | case C_EQ_D: |
| 559 | Format(instr, "c.eq.d 'fs, 'ft, 'Cc"); |
| 560 | break; |
| 561 | case C_UEQ_D: |
| 562 | Format(instr, "c.ueq.d 'fs, 'ft, 'Cc"); |
| 563 | break; |
| 564 | case C_OLT_D: |
| 565 | Format(instr, "c.olt.d 'fs, 'ft, 'Cc"); |
| 566 | break; |
| 567 | case C_ULT_D: |
| 568 | Format(instr, "c.ult.d 'fs, 'ft, 'Cc"); |
| 569 | break; |
| 570 | case C_OLE_D: |
| 571 | Format(instr, "c.ole.d 'fs, 'ft, 'Cc"); |
| 572 | break; |
| 573 | case C_ULE_D: |
| 574 | Format(instr, "c.ule.d 'fs, 'ft, 'Cc"); |
| 575 | break; |
| 576 | default: |
| 577 | Format(instr, "unknown.cop1.d"); |
| 578 | break; |
| 579 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 580 | break; |
| 581 | case S: |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 582 | UNIMPLEMENTED_MIPS(); |
| 583 | break; |
| 584 | case W: |
| 585 | switch (instr->FunctionFieldRaw()) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 586 | case CVT_S_W: // Convert word to float (single). |
| 587 | Format(instr, "cvt.s.w 'fd, 'fs"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 588 | break; |
| 589 | case CVT_D_W: // Convert word to double. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 590 | Format(instr, "cvt.d.w 'fd, 'fs"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 591 | break; |
| 592 | default: |
| 593 | UNREACHABLE(); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 594 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 595 | break; |
| 596 | case L: |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 597 | switch (instr->FunctionFieldRaw()) { |
| 598 | case CVT_D_L: { |
mstarzinger@chromium.org | 3233d2f | 2012-03-14 11:16:03 +0000 | [diff] [blame] | 599 | if (kArchVariant == kMips32r2) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 600 | Format(instr, "cvt.d.l 'fd, 'fs"); |
| 601 | } else { |
| 602 | Unknown(instr); |
| 603 | } |
| 604 | break; |
| 605 | } |
| 606 | case CVT_S_L: { |
mstarzinger@chromium.org | 3233d2f | 2012-03-14 11:16:03 +0000 | [diff] [blame] | 607 | if (kArchVariant == kMips32r2) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 608 | Format(instr, "cvt.s.l 'fd, 'fs"); |
| 609 | } else { |
| 610 | Unknown(instr); |
| 611 | } |
| 612 | break; |
| 613 | } |
| 614 | default: |
| 615 | UNREACHABLE(); |
| 616 | } |
| 617 | break; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 618 | case PS: |
| 619 | UNIMPLEMENTED_MIPS(); |
| 620 | break; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 621 | default: |
| 622 | UNREACHABLE(); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 623 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 624 | break; |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 625 | case COP1X: |
| 626 | switch (instr->FunctionFieldRaw()) { |
| 627 | case MADD_D: |
| 628 | Format(instr, "madd.d 'fd, 'fr, 'fs, 'ft"); |
| 629 | break; |
| 630 | default: |
| 631 | UNREACHABLE(); |
| 632 | }; |
| 633 | break; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 634 | case SPECIAL: |
| 635 | switch (instr->FunctionFieldRaw()) { |
| 636 | case JR: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 637 | Format(instr, "jr 'rs"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 638 | break; |
| 639 | case JALR: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 640 | Format(instr, "jalr 'rs"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 641 | break; |
| 642 | case SLL: |
| 643 | if ( 0x0 == static_cast<int>(instr->InstructionBits())) |
| 644 | Format(instr, "nop"); |
| 645 | else |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 646 | Format(instr, "sll 'rd, 'rt, 'sa"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 647 | break; |
| 648 | case SRL: |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 649 | if (instr->RsValue() == 0) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 650 | Format(instr, "srl 'rd, 'rt, 'sa"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 651 | } else { |
mstarzinger@chromium.org | 3233d2f | 2012-03-14 11:16:03 +0000 | [diff] [blame] | 652 | if (kArchVariant == kMips32r2) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 653 | Format(instr, "rotr 'rd, 'rt, 'sa"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 654 | } else { |
| 655 | Unknown(instr); |
| 656 | } |
| 657 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 658 | break; |
| 659 | case SRA: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 660 | Format(instr, "sra 'rd, 'rt, 'sa"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 661 | break; |
| 662 | case SLLV: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 663 | Format(instr, "sllv 'rd, 'rt, 'rs"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 664 | break; |
| 665 | case SRLV: |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 666 | if (instr->SaValue() == 0) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 667 | Format(instr, "srlv 'rd, 'rt, 'rs"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 668 | } else { |
mstarzinger@chromium.org | 3233d2f | 2012-03-14 11:16:03 +0000 | [diff] [blame] | 669 | if (kArchVariant == kMips32r2) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 670 | Format(instr, "rotrv 'rd, 'rt, 'rs"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 671 | } else { |
| 672 | Unknown(instr); |
| 673 | } |
| 674 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 675 | break; |
| 676 | case SRAV: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 677 | Format(instr, "srav 'rd, 'rt, 'rs"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 678 | break; |
| 679 | case MFHI: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 680 | Format(instr, "mfhi 'rd"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 681 | break; |
| 682 | case MFLO: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 683 | Format(instr, "mflo 'rd"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 684 | break; |
| 685 | case MULT: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 686 | Format(instr, "mult 'rs, 'rt"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 687 | break; |
| 688 | case MULTU: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 689 | Format(instr, "multu 'rs, 'rt"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 690 | break; |
| 691 | case DIV: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 692 | Format(instr, "div 'rs, 'rt"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 693 | break; |
| 694 | case DIVU: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 695 | Format(instr, "divu 'rs, 'rt"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 696 | break; |
| 697 | case ADD: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 698 | Format(instr, "add 'rd, 'rs, 'rt"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 699 | break; |
| 700 | case ADDU: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 701 | Format(instr, "addu 'rd, 'rs, 'rt"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 702 | break; |
| 703 | case SUB: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 704 | Format(instr, "sub 'rd, 'rs, 'rt"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 705 | break; |
| 706 | case SUBU: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 707 | Format(instr, "subu 'rd, 'rs, 'rt"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 708 | break; |
| 709 | case AND: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 710 | Format(instr, "and 'rd, 'rs, 'rt"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 711 | break; |
| 712 | case OR: |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 713 | if (0 == instr->RsValue()) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 714 | Format(instr, "mov 'rd, 'rt"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 715 | } else if (0 == instr->RtValue()) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 716 | Format(instr, "mov 'rd, 'rs"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 717 | } else { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 718 | Format(instr, "or 'rd, 'rs, 'rt"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 719 | } |
| 720 | break; |
| 721 | case XOR: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 722 | Format(instr, "xor 'rd, 'rs, 'rt"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 723 | break; |
| 724 | case NOR: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 725 | Format(instr, "nor 'rd, 'rs, 'rt"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 726 | break; |
| 727 | case SLT: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 728 | Format(instr, "slt 'rd, 'rs, 'rt"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 729 | break; |
| 730 | case SLTU: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 731 | Format(instr, "sltu 'rd, 'rs, 'rt"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 732 | break; |
| 733 | case BREAK: |
| 734 | Format(instr, "break, code: 'code"); |
| 735 | break; |
| 736 | case TGE: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 737 | Format(instr, "tge 'rs, 'rt, code: 'code"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 738 | break; |
| 739 | case TGEU: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 740 | Format(instr, "tgeu 'rs, 'rt, code: 'code"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 741 | break; |
| 742 | case TLT: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 743 | Format(instr, "tlt 'rs, 'rt, code: 'code"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 744 | break; |
| 745 | case TLTU: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 746 | Format(instr, "tltu 'rs, 'rt, code: 'code"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 747 | break; |
| 748 | case TEQ: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 749 | Format(instr, "teq 'rs, 'rt, code: 'code"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 750 | break; |
| 751 | case TNE: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 752 | Format(instr, "tne 'rs, 'rt, code: 'code"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 753 | break; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 754 | case MOVZ: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 755 | Format(instr, "movz 'rd, 'rs, 'rt"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 756 | break; |
| 757 | case MOVN: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 758 | Format(instr, "movn 'rd, 'rs, 'rt"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 759 | break; |
| 760 | case MOVCI: |
| 761 | if (instr->Bit(16)) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 762 | Format(instr, "movt 'rd, 'rs, 'bc"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 763 | } else { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 764 | Format(instr, "movf 'rd, 'rs, 'bc"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 765 | } |
| 766 | break; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 767 | default: |
| 768 | UNREACHABLE(); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 769 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 770 | break; |
| 771 | case SPECIAL2: |
| 772 | switch (instr->FunctionFieldRaw()) { |
| 773 | case MUL: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 774 | Format(instr, "mul 'rd, 'rs, 'rt"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 775 | break; |
| 776 | case CLZ: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 777 | Format(instr, "clz 'rd, 'rs"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 778 | break; |
| 779 | default: |
| 780 | UNREACHABLE(); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 781 | } |
| 782 | break; |
| 783 | case SPECIAL3: |
| 784 | switch (instr->FunctionFieldRaw()) { |
| 785 | case INS: { |
mstarzinger@chromium.org | 3233d2f | 2012-03-14 11:16:03 +0000 | [diff] [blame] | 786 | if (kArchVariant == kMips32r2) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 787 | Format(instr, "ins 'rt, 'rs, 'sa, 'ss2"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 788 | } else { |
| 789 | Unknown(instr); |
| 790 | } |
| 791 | break; |
| 792 | } |
| 793 | case EXT: { |
mstarzinger@chromium.org | 3233d2f | 2012-03-14 11:16:03 +0000 | [diff] [blame] | 794 | if (kArchVariant == kMips32r2) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 795 | Format(instr, "ext 'rt, 'rs, 'sa, 'ss1"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 796 | } else { |
| 797 | Unknown(instr); |
| 798 | } |
| 799 | break; |
| 800 | } |
| 801 | default: |
| 802 | UNREACHABLE(); |
| 803 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 804 | break; |
| 805 | default: |
| 806 | UNREACHABLE(); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 807 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 808 | } |
| 809 | |
| 810 | |
| 811 | void Decoder::DecodeTypeImmediate(Instruction* instr) { |
| 812 | switch (instr->OpcodeFieldRaw()) { |
| 813 | // ------------- REGIMM class. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 814 | case COP1: |
| 815 | switch (instr->RsFieldRaw()) { |
| 816 | case BC1: |
| 817 | if (instr->FBtrueValue()) { |
| 818 | Format(instr, "bc1t 'bc, 'imm16u"); |
| 819 | } else { |
| 820 | Format(instr, "bc1f 'bc, 'imm16u"); |
| 821 | } |
| 822 | break; |
| 823 | default: |
| 824 | UNREACHABLE(); |
| 825 | }; |
| 826 | break; // Case COP1. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 827 | case REGIMM: |
| 828 | switch (instr->RtFieldRaw()) { |
| 829 | case BLTZ: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 830 | Format(instr, "bltz 'rs, 'imm16u"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 831 | break; |
| 832 | case BLTZAL: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 833 | Format(instr, "bltzal 'rs, 'imm16u"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 834 | break; |
| 835 | case BGEZ: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 836 | Format(instr, "bgez 'rs, 'imm16u"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 837 | break; |
| 838 | case BGEZAL: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 839 | Format(instr, "bgezal 'rs, 'imm16u"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 840 | break; |
| 841 | default: |
| 842 | UNREACHABLE(); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 843 | } |
| 844 | break; // Case REGIMM. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 845 | // ------------- Branch instructions. |
| 846 | case BEQ: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 847 | Format(instr, "beq 'rs, 'rt, 'imm16u"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 848 | break; |
| 849 | case BNE: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 850 | Format(instr, "bne 'rs, 'rt, 'imm16u"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 851 | break; |
| 852 | case BLEZ: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 853 | Format(instr, "blez 'rs, 'imm16u"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 854 | break; |
| 855 | case BGTZ: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 856 | Format(instr, "bgtz 'rs, 'imm16u"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 857 | break; |
| 858 | // ------------- Arithmetic instructions. |
| 859 | case ADDI: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 860 | Format(instr, "addi 'rt, 'rs, 'imm16s"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 861 | break; |
| 862 | case ADDIU: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 863 | Format(instr, "addiu 'rt, 'rs, 'imm16s"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 864 | break; |
| 865 | case SLTI: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 866 | Format(instr, "slti 'rt, 'rs, 'imm16s"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 867 | break; |
| 868 | case SLTIU: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 869 | Format(instr, "sltiu 'rt, 'rs, 'imm16u"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 870 | break; |
| 871 | case ANDI: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 872 | Format(instr, "andi 'rt, 'rs, 'imm16x"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 873 | break; |
| 874 | case ORI: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 875 | Format(instr, "ori 'rt, 'rs, 'imm16x"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 876 | break; |
| 877 | case XORI: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 878 | Format(instr, "xori 'rt, 'rs, 'imm16x"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 879 | break; |
| 880 | case LUI: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 881 | Format(instr, "lui 'rt, 'imm16x"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 882 | break; |
| 883 | // ------------- Memory instructions. |
| 884 | case LB: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 885 | Format(instr, "lb 'rt, 'imm16s('rs)"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 886 | break; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 887 | case LH: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 888 | Format(instr, "lh 'rt, 'imm16s('rs)"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 889 | break; |
| 890 | case LWL: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 891 | Format(instr, "lwl 'rt, 'imm16s('rs)"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 892 | break; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 893 | case LW: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 894 | Format(instr, "lw 'rt, 'imm16s('rs)"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 895 | break; |
| 896 | case LBU: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 897 | Format(instr, "lbu 'rt, 'imm16s('rs)"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 898 | break; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 899 | case LHU: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 900 | Format(instr, "lhu 'rt, 'imm16s('rs)"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 901 | break; |
| 902 | case LWR: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 903 | Format(instr, "lwr 'rt, 'imm16s('rs)"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 904 | break; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 905 | case SB: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 906 | Format(instr, "sb 'rt, 'imm16s('rs)"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 907 | break; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 908 | case SH: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 909 | Format(instr, "sh 'rt, 'imm16s('rs)"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 910 | break; |
| 911 | case SWL: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 912 | Format(instr, "swl 'rt, 'imm16s('rs)"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 913 | break; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 914 | case SW: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 915 | Format(instr, "sw 'rt, 'imm16s('rs)"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 916 | break; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 917 | case SWR: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 918 | Format(instr, "swr 'rt, 'imm16s('rs)"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 919 | break; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 920 | case LWC1: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 921 | Format(instr, "lwc1 'ft, 'imm16s('rs)"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 922 | break; |
| 923 | case LDC1: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 924 | Format(instr, "ldc1 'ft, 'imm16s('rs)"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 925 | break; |
| 926 | case SWC1: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 927 | Format(instr, "swc1 'ft, 'imm16s('rs)"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 928 | break; |
| 929 | case SDC1: |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 930 | Format(instr, "sdc1 'ft, 'imm16s('rs)"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 931 | break; |
| 932 | default: |
| 933 | UNREACHABLE(); |
| 934 | break; |
| 935 | }; |
| 936 | } |
| 937 | |
| 938 | |
| 939 | void Decoder::DecodeTypeJump(Instruction* instr) { |
| 940 | switch (instr->OpcodeFieldRaw()) { |
| 941 | case J: |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 942 | Format(instr, "j 'imm26x"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 943 | break; |
| 944 | case JAL: |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 945 | Format(instr, "jal 'imm26x"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 946 | break; |
| 947 | default: |
| 948 | UNREACHABLE(); |
| 949 | } |
| 950 | } |
| 951 | |
| 952 | |
| 953 | // Disassemble the instruction at *instr_ptr into the output buffer. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 954 | int Decoder::InstructionDecode(byte* instr_ptr) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 955 | Instruction* instr = Instruction::At(instr_ptr); |
| 956 | // Print raw instruction bytes. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 957 | out_buffer_pos_ += OS::SNPrintF(out_buffer_ + out_buffer_pos_, |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 958 | "%08x ", |
| 959 | instr->InstructionBits()); |
| 960 | switch (instr->InstructionType()) { |
| 961 | case Instruction::kRegisterType: { |
| 962 | DecodeTypeRegister(instr); |
| 963 | break; |
| 964 | } |
| 965 | case Instruction::kImmediateType: { |
| 966 | DecodeTypeImmediate(instr); |
| 967 | break; |
| 968 | } |
| 969 | case Instruction::kJumpType: { |
| 970 | DecodeTypeJump(instr); |
| 971 | break; |
| 972 | } |
| 973 | default: { |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 974 | Format(instr, "UNSUPPORTED"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 975 | UNSUPPORTED_MIPS(); |
| 976 | } |
| 977 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 978 | return Instruction::kInstrSize; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 979 | } |
| 980 | |
| 981 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 982 | } } // namespace v8::internal |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 983 | |
| 984 | |
| 985 | |
| 986 | //------------------------------------------------------------------------------ |
| 987 | |
| 988 | namespace disasm { |
| 989 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 990 | const char* NameConverter::NameOfAddress(byte* addr) const { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 991 | v8::internal::OS::SNPrintF(tmp_buffer_, "%p", addr); |
| 992 | return tmp_buffer_.start(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 993 | } |
| 994 | |
| 995 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 996 | const char* NameConverter::NameOfConstant(byte* addr) const { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 997 | return NameOfAddress(addr); |
| 998 | } |
| 999 | |
| 1000 | |
| 1001 | const char* NameConverter::NameOfCPURegister(int reg) const { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1002 | return v8::internal::Registers::Name(reg); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1003 | } |
| 1004 | |
| 1005 | |
| 1006 | const char* NameConverter::NameOfXMMRegister(int reg) const { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1007 | return v8::internal::FPURegisters::Name(reg); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1008 | } |
| 1009 | |
| 1010 | |
| 1011 | const char* NameConverter::NameOfByteCPURegister(int reg) const { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1012 | UNREACHABLE(); // MIPS does not have the concept of a byte register. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1013 | return "nobytereg"; |
| 1014 | } |
| 1015 | |
| 1016 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1017 | const char* NameConverter::NameInCode(byte* addr) const { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1018 | // The default name converter is called for unknown code. So we will not try |
| 1019 | // to access any memory. |
| 1020 | return ""; |
| 1021 | } |
| 1022 | |
| 1023 | |
| 1024 | //------------------------------------------------------------------------------ |
| 1025 | |
| 1026 | Disassembler::Disassembler(const NameConverter& converter) |
| 1027 | : converter_(converter) {} |
| 1028 | |
| 1029 | |
| 1030 | Disassembler::~Disassembler() {} |
| 1031 | |
| 1032 | |
| 1033 | int Disassembler::InstructionDecode(v8::internal::Vector<char> buffer, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1034 | byte* instruction) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1035 | v8::internal::Decoder d(converter_, buffer); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1036 | return d.InstructionDecode(instruction); |
| 1037 | } |
| 1038 | |
| 1039 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1040 | // The MIPS assembler does not currently use constant pools. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1041 | int Disassembler::ConstantPoolSizeAt(byte* instruction) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1042 | return -1; |
| 1043 | } |
| 1044 | |
| 1045 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1046 | void Disassembler::Disassemble(FILE* f, byte* begin, byte* end) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1047 | NameConverter converter; |
| 1048 | Disassembler d(converter); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1049 | for (byte* pc = begin; pc < end;) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1050 | v8::internal::EmbeddedVector<char, 128> buffer; |
| 1051 | buffer[0] = '\0'; |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1052 | byte* prev_pc = pc; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1053 | pc += d.InstructionDecode(buffer, pc); |
| 1054 | fprintf(f, "%p %08x %s\n", |
| 1055 | prev_pc, *reinterpret_cast<int32_t*>(prev_pc), buffer.start()); |
| 1056 | } |
| 1057 | } |
| 1058 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1059 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1060 | #undef UNSUPPORTED |
| 1061 | |
| 1062 | } // namespace disasm |
| 1063 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1064 | #endif // V8_TARGET_ARCH_MIPS |