OLD | NEW |
1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
(...skipping 1287 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
1298 } | 1298 } |
1299 | 1299 |
1300 | 1300 |
1301 HValue* LChunkBuilder::SimplifiedDivisorForMathFloorOfDiv(HValue* divisor) { | 1301 HValue* LChunkBuilder::SimplifiedDivisorForMathFloorOfDiv(HValue* divisor) { |
1302 if (divisor->IsConstant() && | 1302 if (divisor->IsConstant() && |
1303 HConstant::cast(divisor)->HasInteger32Value()) { | 1303 HConstant::cast(divisor)->HasInteger32Value()) { |
1304 HConstant* constant_val = HConstant::cast(divisor); | 1304 HConstant* constant_val = HConstant::cast(divisor); |
1305 return constant_val->CopyToRepresentation(Representation::Integer32(), | 1305 return constant_val->CopyToRepresentation(Representation::Integer32(), |
1306 divisor->block()->zone()); | 1306 divisor->block()->zone()); |
1307 } | 1307 } |
| 1308 // A value with an integer representation does not need to be transformed. |
| 1309 if (divisor->representation().IsInteger32()) { |
| 1310 return divisor; |
| 1311 // A change from an integer32 can be replaced by the integer32 value. |
| 1312 } else if (divisor->IsChange() && |
| 1313 HChange::cast(divisor)->from().IsInteger32()) { |
| 1314 return HChange::cast(divisor)->value(); |
| 1315 } |
1308 return NULL; | 1316 return NULL; |
1309 } | 1317 } |
1310 | 1318 |
1311 | 1319 |
1312 LInstruction* LChunkBuilder::DoMathFloorOfDiv(HMathFloorOfDiv* instr) { | 1320 LInstruction* LChunkBuilder::DoMathFloorOfDiv(HMathFloorOfDiv* instr) { |
1313 HValue* right = instr->right(); | 1321 HValue* right = instr->right(); |
| 1322 if (!right->IsConstant()) { |
| 1323 ASSERT(right->representation().IsInteger32()); |
| 1324 // The temporary operand is necessary to ensure that right is not allocated |
| 1325 // into edx. |
| 1326 LOperand* temp = FixedTemp(edx); |
| 1327 LOperand* dividend = UseFixed(instr->left(), eax); |
| 1328 LOperand* divisor = UseRegister(instr->right()); |
| 1329 LDivI* flooring_div = new(zone()) LDivI(dividend, divisor, temp); |
| 1330 return AssignEnvironment(DefineFixed(flooring_div, eax)); |
| 1331 } |
| 1332 |
1314 ASSERT(right->IsConstant() && HConstant::cast(right)->HasInteger32Value()); | 1333 ASSERT(right->IsConstant() && HConstant::cast(right)->HasInteger32Value()); |
1315 LOperand* divisor = chunk_->DefineConstantOperand(HConstant::cast(right)); | 1334 LOperand* divisor = chunk_->DefineConstantOperand(HConstant::cast(right)); |
1316 int32_t divisor_si = HConstant::cast(right)->Integer32Value(); | 1335 int32_t divisor_si = HConstant::cast(right)->Integer32Value(); |
1317 if (divisor_si == 0) { | 1336 if (divisor_si == 0) { |
1318 LOperand* dividend = UseRegister(instr->left()); | 1337 LOperand* dividend = UseRegister(instr->left()); |
1319 return AssignEnvironment(DefineAsRegister( | 1338 return AssignEnvironment(DefineAsRegister( |
1320 new(zone()) LMathFloorOfDiv(dividend, divisor, NULL))); | 1339 new(zone()) LMathFloorOfDiv(dividend, divisor, NULL))); |
1321 } else if (IsPowerOf2(abs(divisor_si))) { | 1340 } else if (IsPowerOf2(abs(divisor_si))) { |
1322 // use dividend as temp if divisor < 0 && divisor != -1 | 1341 // use dividend as temp if divisor < 0 && divisor != -1 |
1323 LOperand* dividend = divisor_si < -1 ? UseTempRegister(instr->left()) : | 1342 LOperand* dividend = divisor_si < -1 ? UseTempRegister(instr->left()) : |
(...skipping 1154 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
2478 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) { | 2497 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) { |
2479 LOperand* object = UseRegister(instr->object()); | 2498 LOperand* object = UseRegister(instr->object()); |
2480 LOperand* index = UseTempRegister(instr->index()); | 2499 LOperand* index = UseTempRegister(instr->index()); |
2481 return DefineSameAsFirst(new(zone()) LLoadFieldByIndex(object, index)); | 2500 return DefineSameAsFirst(new(zone()) LLoadFieldByIndex(object, index)); |
2482 } | 2501 } |
2483 | 2502 |
2484 | 2503 |
2485 } } // namespace v8::internal | 2504 } } // namespace v8::internal |
2486 | 2505 |
2487 #endif // V8_TARGET_ARCH_IA32 | 2506 #endif // V8_TARGET_ARCH_IA32 |
OLD | NEW |