karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1 | // Copyright 2011 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 | #include "v8.h" |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 29 | |
| 30 | #if defined(V8_TARGET_ARCH_MIPS) |
| 31 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 32 | #include "constants-mips.h" |
| 33 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 34 | namespace v8 { |
| 35 | namespace internal { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 36 | |
| 37 | |
| 38 | // ----------------------------------------------------------------------------- |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 39 | // Registers. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 40 | |
| 41 | |
| 42 | // These register names are defined in a way to match the native disassembler |
| 43 | // formatting. See for example the command "objdump -d <binary file>". |
| 44 | const char* Registers::names_[kNumSimuRegisters] = { |
| 45 | "zero_reg", |
| 46 | "at", |
| 47 | "v0", "v1", |
| 48 | "a0", "a1", "a2", "a3", |
| 49 | "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", |
| 50 | "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", |
| 51 | "t8", "t9", |
| 52 | "k0", "k1", |
| 53 | "gp", |
| 54 | "sp", |
| 55 | "fp", |
| 56 | "ra", |
| 57 | "LO", "HI", |
| 58 | "pc" |
| 59 | }; |
| 60 | |
| 61 | // List of alias names which can be used when referring to MIPS registers. |
| 62 | const Registers::RegisterAlias Registers::aliases_[] = { |
| 63 | {0, "zero"}, |
| 64 | {23, "cp"}, |
| 65 | {30, "s8"}, |
| 66 | {30, "s8_fp"}, |
| 67 | {kInvalidRegister, NULL} |
| 68 | }; |
| 69 | |
| 70 | const char* Registers::Name(int reg) { |
| 71 | const char* result; |
| 72 | if ((0 <= reg) && (reg < kNumSimuRegisters)) { |
| 73 | result = names_[reg]; |
| 74 | } else { |
| 75 | result = "noreg"; |
| 76 | } |
| 77 | return result; |
| 78 | } |
| 79 | |
| 80 | |
| 81 | int Registers::Number(const char* name) { |
| 82 | // Look through the canonical names. |
| 83 | for (int i = 0; i < kNumSimuRegisters; i++) { |
| 84 | if (strcmp(names_[i], name) == 0) { |
| 85 | return i; |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | // Look through the alias names. |
| 90 | int i = 0; |
| 91 | while (aliases_[i].reg != kInvalidRegister) { |
| 92 | if (strcmp(aliases_[i].name, name) == 0) { |
| 93 | return aliases_[i].reg; |
| 94 | } |
| 95 | i++; |
| 96 | } |
| 97 | |
| 98 | // No register with the reguested name found. |
| 99 | return kInvalidRegister; |
| 100 | } |
| 101 | |
| 102 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 103 | const char* FPURegisters::names_[kNumFPURegisters] = { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 104 | "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", "f8", "f9", "f10", "f11", |
| 105 | "f12", "f13", "f14", "f15", "f16", "f17", "f18", "f19", "f20", "f21", |
| 106 | "f22", "f23", "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31" |
| 107 | }; |
| 108 | |
| 109 | // List of alias names which can be used when referring to MIPS registers. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 110 | const FPURegisters::RegisterAlias FPURegisters::aliases_[] = { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 111 | {kInvalidRegister, NULL} |
| 112 | }; |
| 113 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 114 | const char* FPURegisters::Name(int creg) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 115 | const char* result; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 116 | if ((0 <= creg) && (creg < kNumFPURegisters)) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 117 | result = names_[creg]; |
| 118 | } else { |
| 119 | result = "nocreg"; |
| 120 | } |
| 121 | return result; |
| 122 | } |
| 123 | |
| 124 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 125 | int FPURegisters::Number(const char* name) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 126 | // Look through the canonical names. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 127 | for (int i = 0; i < kNumFPURegisters; i++) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 128 | if (strcmp(names_[i], name) == 0) { |
| 129 | return i; |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | // Look through the alias names. |
| 134 | int i = 0; |
| 135 | while (aliases_[i].creg != kInvalidRegister) { |
| 136 | if (strcmp(aliases_[i].name, name) == 0) { |
| 137 | return aliases_[i].creg; |
| 138 | } |
| 139 | i++; |
| 140 | } |
| 141 | |
| 142 | // No Cregister with the reguested name found. |
| 143 | return kInvalidFPURegister; |
| 144 | } |
| 145 | |
| 146 | |
| 147 | // ----------------------------------------------------------------------------- |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 148 | // Instructions. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 149 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 150 | bool Instruction::IsForbiddenInBranchDelay() const { |
| 151 | const int op = OpcodeFieldRaw(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 152 | switch (op) { |
| 153 | case J: |
| 154 | case JAL: |
| 155 | case BEQ: |
| 156 | case BNE: |
| 157 | case BLEZ: |
| 158 | case BGTZ: |
| 159 | case BEQL: |
| 160 | case BNEL: |
| 161 | case BLEZL: |
| 162 | case BGTZL: |
| 163 | return true; |
| 164 | case REGIMM: |
| 165 | switch (RtFieldRaw()) { |
| 166 | case BLTZ: |
| 167 | case BGEZ: |
| 168 | case BLTZAL: |
| 169 | case BGEZAL: |
| 170 | return true; |
| 171 | default: |
| 172 | return false; |
| 173 | }; |
| 174 | break; |
| 175 | case SPECIAL: |
| 176 | switch (FunctionFieldRaw()) { |
| 177 | case JR: |
| 178 | case JALR: |
| 179 | return true; |
| 180 | default: |
| 181 | return false; |
| 182 | }; |
| 183 | break; |
| 184 | default: |
| 185 | return false; |
| 186 | }; |
| 187 | } |
| 188 | |
| 189 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 190 | bool Instruction::IsLinkingInstruction() const { |
| 191 | const int op = OpcodeFieldRaw(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 192 | switch (op) { |
| 193 | case JAL: |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 194 | return true; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 195 | case REGIMM: |
| 196 | switch (RtFieldRaw()) { |
| 197 | case BGEZAL: |
| 198 | case BLTZAL: |
| 199 | return true; |
| 200 | default: |
| 201 | return false; |
| 202 | }; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 203 | case SPECIAL: |
| 204 | switch (FunctionFieldRaw()) { |
| 205 | case JALR: |
| 206 | return true; |
| 207 | default: |
| 208 | return false; |
| 209 | }; |
| 210 | default: |
| 211 | return false; |
| 212 | }; |
| 213 | } |
| 214 | |
| 215 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 216 | bool Instruction::IsTrap() const { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 217 | if (OpcodeFieldRaw() != SPECIAL) { |
| 218 | return false; |
| 219 | } else { |
| 220 | switch (FunctionFieldRaw()) { |
| 221 | case BREAK: |
| 222 | case TGE: |
| 223 | case TGEU: |
| 224 | case TLT: |
| 225 | case TLTU: |
| 226 | case TEQ: |
| 227 | case TNE: |
| 228 | return true; |
| 229 | default: |
| 230 | return false; |
| 231 | }; |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | |
| 236 | Instruction::Type Instruction::InstructionType() const { |
| 237 | switch (OpcodeFieldRaw()) { |
| 238 | case SPECIAL: |
| 239 | switch (FunctionFieldRaw()) { |
| 240 | case JR: |
| 241 | case JALR: |
| 242 | case BREAK: |
| 243 | case SLL: |
| 244 | case SRL: |
| 245 | case SRA: |
| 246 | case SLLV: |
| 247 | case SRLV: |
| 248 | case SRAV: |
| 249 | case MFHI: |
| 250 | case MFLO: |
| 251 | case MULT: |
| 252 | case MULTU: |
| 253 | case DIV: |
| 254 | case DIVU: |
| 255 | case ADD: |
| 256 | case ADDU: |
| 257 | case SUB: |
| 258 | case SUBU: |
| 259 | case AND: |
| 260 | case OR: |
| 261 | case XOR: |
| 262 | case NOR: |
| 263 | case SLT: |
| 264 | case SLTU: |
| 265 | case TGE: |
| 266 | case TGEU: |
| 267 | case TLT: |
| 268 | case TLTU: |
| 269 | case TEQ: |
| 270 | case TNE: |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 271 | case MOVZ: |
| 272 | case MOVN: |
| 273 | case MOVCI: |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 274 | return kRegisterType; |
| 275 | default: |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 276 | return kUnsupported; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 277 | }; |
| 278 | break; |
| 279 | case SPECIAL2: |
| 280 | switch (FunctionFieldRaw()) { |
| 281 | case MUL: |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 282 | case CLZ: |
| 283 | return kRegisterType; |
| 284 | default: |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 285 | return kUnsupported; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 286 | }; |
| 287 | break; |
| 288 | case SPECIAL3: |
| 289 | switch (FunctionFieldRaw()) { |
| 290 | case INS: |
| 291 | case EXT: |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 292 | return kRegisterType; |
| 293 | default: |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 294 | return kUnsupported; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 295 | }; |
| 296 | break; |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 297 | case COP1: // Coprocessor instructions. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 298 | switch (RsFieldRawNoAssert()) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 299 | case BC1: // Branch on coprocessor condition. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 300 | return kImmediateType; |
| 301 | default: |
| 302 | return kRegisterType; |
| 303 | }; |
| 304 | break; |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 305 | case COP1X: |
| 306 | return kRegisterType; |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 307 | // 16 bits Immediate type instructions. e.g.: addi dest, src, imm16. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 308 | case REGIMM: |
| 309 | case BEQ: |
| 310 | case BNE: |
| 311 | case BLEZ: |
| 312 | case BGTZ: |
| 313 | case ADDI: |
| 314 | case ADDIU: |
| 315 | case SLTI: |
| 316 | case SLTIU: |
| 317 | case ANDI: |
| 318 | case ORI: |
| 319 | case XORI: |
| 320 | case LUI: |
| 321 | case BEQL: |
| 322 | case BNEL: |
| 323 | case BLEZL: |
| 324 | case BGTZL: |
| 325 | case LB: |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 326 | case LH: |
| 327 | case LWL: |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 328 | case LW: |
| 329 | case LBU: |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 330 | case LHU: |
| 331 | case LWR: |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 332 | case SB: |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 333 | case SH: |
| 334 | case SWL: |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 335 | case SW: |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 336 | case SWR: |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 337 | case LWC1: |
| 338 | case LDC1: |
| 339 | case SWC1: |
| 340 | case SDC1: |
| 341 | return kImmediateType; |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 342 | // 26 bits immediate type instructions. e.g.: j imm26. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 343 | case J: |
| 344 | case JAL: |
| 345 | return kJumpType; |
| 346 | default: |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 347 | return kUnsupported; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 348 | }; |
| 349 | return kUnsupported; |
| 350 | } |
| 351 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 352 | |
| 353 | } } // namespace v8::internal |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 354 | |
| 355 | #endif // V8_TARGET_ARCH_MIPS |