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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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 |
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676 } | 676 } |
677 } | 677 } |
678 | 678 |
679 | 679 |
680 void LCodeGen::DoUnknownOSRValue(LUnknownOSRValue* instr) { | 680 void LCodeGen::DoUnknownOSRValue(LUnknownOSRValue* instr) { |
681 // Nothing to do. | 681 // Nothing to do. |
682 } | 682 } |
683 | 683 |
684 | 684 |
685 void LCodeGen::DoModI(LModI* instr) { | 685 void LCodeGen::DoModI(LModI* instr) { |
686 Abort("Unimplemented: %s", "DoModI"); | 686 LOperand* right = instr->InputAt(1); |
| 687 ASSERT(ToRegister(instr->result()).is(rdx)); |
| 688 ASSERT(ToRegister(instr->InputAt(0)).is(rax)); |
| 689 ASSERT(!ToRegister(instr->InputAt(1)).is(rax)); |
| 690 ASSERT(!ToRegister(instr->InputAt(1)).is(rdx)); |
| 691 |
| 692 Register right_reg = ToRegister(right); |
| 693 |
| 694 // Check for x % 0. |
| 695 if (instr->hydrogen()->CheckFlag(HValue::kCanBeDivByZero)) { |
| 696 __ testl(right_reg, right_reg); |
| 697 DeoptimizeIf(zero, instr->environment()); |
| 698 } |
| 699 |
| 700 // Sign extend eax to edx. (We are using only the low 32 bits of the values.) |
| 701 __ cdq(); |
| 702 |
| 703 // Check for (0 % -x) that will produce negative zero. |
| 704 if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| 705 NearLabel positive_left; |
| 706 NearLabel done; |
| 707 __ testl(rax, rax); |
| 708 __ j(not_sign, &positive_left); |
| 709 __ idivl(right_reg); |
| 710 |
| 711 // Test the remainder for 0, because then the result would be -0. |
| 712 __ testl(rdx, rdx); |
| 713 __ j(not_zero, &done); |
| 714 |
| 715 DeoptimizeIf(no_condition, instr->environment()); |
| 716 __ bind(&positive_left); |
| 717 __ idivl(right_reg); |
| 718 __ bind(&done); |
| 719 } else { |
| 720 __ idivl(right_reg); |
| 721 } |
687 } | 722 } |
688 | 723 |
689 | 724 |
690 void LCodeGen::DoDivI(LDivI* instr) { | 725 void LCodeGen::DoDivI(LDivI* instr) { |
691 LOperand* right = instr->InputAt(1); | 726 LOperand* right = instr->InputAt(1); |
692 ASSERT(ToRegister(instr->result()).is(rax)); | 727 ASSERT(ToRegister(instr->result()).is(rax)); |
693 ASSERT(ToRegister(instr->InputAt(0)).is(rax)); | 728 ASSERT(ToRegister(instr->InputAt(0)).is(rax)); |
694 ASSERT(!ToRegister(instr->InputAt(1)).is(rax)); | 729 ASSERT(!ToRegister(instr->InputAt(1)).is(rax)); |
695 ASSERT(!ToRegister(instr->InputAt(1)).is(rdx)); | 730 ASSERT(!ToRegister(instr->InputAt(1)).is(rdx)); |
696 | 731 |
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3233 RegisterEnvironmentForDeoptimization(environment); | 3268 RegisterEnvironmentForDeoptimization(environment); |
3234 ASSERT(osr_pc_offset_ == -1); | 3269 ASSERT(osr_pc_offset_ == -1); |
3235 osr_pc_offset_ = masm()->pc_offset(); | 3270 osr_pc_offset_ = masm()->pc_offset(); |
3236 } | 3271 } |
3237 | 3272 |
3238 #undef __ | 3273 #undef __ |
3239 | 3274 |
3240 } } // namespace v8::internal | 3275 } } // namespace v8::internal |
3241 | 3276 |
3242 #endif // V8_TARGET_ARCH_X64 | 3277 #endif // V8_TARGET_ARCH_X64 |
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