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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "src/v8.h" | 5 #include "src/v8.h" |
| 6 | 6 |
| 7 #if V8_TARGET_ARCH_IA32 | 7 #if V8_TARGET_ARCH_IA32 |
| 8 | 8 |
| 9 #include "src/bootstrapper.h" | 9 #include "src/bootstrapper.h" |
| 10 #include "src/codegen.h" | 10 #include "src/codegen.h" |
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| 985 const int offset = -2 * kPointerSize; | 985 const int offset = -2 * kPointerSize; |
| 986 for (int i = 0; i < XMMRegister::kMaxNumRegisters; i++) { | 986 for (int i = 0; i < XMMRegister::kMaxNumRegisters; i++) { |
| 987 XMMRegister reg = XMMRegister::from_code(i); | 987 XMMRegister reg = XMMRegister::from_code(i); |
| 988 movsd(Operand(ebp, offset - ((i + 1) * kDoubleSize)), reg); | 988 movsd(Operand(ebp, offset - ((i + 1) * kDoubleSize)), reg); |
| 989 } | 989 } |
| 990 } else { | 990 } else { |
| 991 sub(esp, Immediate(argc * kPointerSize)); | 991 sub(esp, Immediate(argc * kPointerSize)); |
| 992 } | 992 } |
| 993 | 993 |
| 994 // Get the required frame alignment for the OS. | 994 // Get the required frame alignment for the OS. |
| 995 const int kFrameAlignment = OS::ActivationFrameAlignment(); | 995 const int kFrameAlignment = base::OS::ActivationFrameAlignment(); |
| 996 if (kFrameAlignment > 0) { | 996 if (kFrameAlignment > 0) { |
| 997 ASSERT(IsPowerOf2(kFrameAlignment)); | 997 ASSERT(IsPowerOf2(kFrameAlignment)); |
| 998 and_(esp, -kFrameAlignment); | 998 and_(esp, -kFrameAlignment); |
| 999 } | 999 } |
| 1000 | 1000 |
| 1001 // Patch the saved entry sp. | 1001 // Patch the saved entry sp. |
| 1002 mov(Operand(ebp, ExitFrameConstants::kSPOffset), esp); | 1002 mov(Operand(ebp, ExitFrameConstants::kSPOffset), esp); |
| 1003 } | 1003 } |
| 1004 | 1004 |
| 1005 | 1005 |
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| 2755 void MacroAssembler::Check(Condition cc, BailoutReason reason) { | 2755 void MacroAssembler::Check(Condition cc, BailoutReason reason) { |
| 2756 Label L; | 2756 Label L; |
| 2757 j(cc, &L); | 2757 j(cc, &L); |
| 2758 Abort(reason); | 2758 Abort(reason); |
| 2759 // will not return here | 2759 // will not return here |
| 2760 bind(&L); | 2760 bind(&L); |
| 2761 } | 2761 } |
| 2762 | 2762 |
| 2763 | 2763 |
| 2764 void MacroAssembler::CheckStackAlignment() { | 2764 void MacroAssembler::CheckStackAlignment() { |
| 2765 int frame_alignment = OS::ActivationFrameAlignment(); | 2765 int frame_alignment = base::OS::ActivationFrameAlignment(); |
| 2766 int frame_alignment_mask = frame_alignment - 1; | 2766 int frame_alignment_mask = frame_alignment - 1; |
| 2767 if (frame_alignment > kPointerSize) { | 2767 if (frame_alignment > kPointerSize) { |
| 2768 ASSERT(IsPowerOf2(frame_alignment)); | 2768 ASSERT(IsPowerOf2(frame_alignment)); |
| 2769 Label alignment_as_expected; | 2769 Label alignment_as_expected; |
| 2770 test(esp, Immediate(frame_alignment_mask)); | 2770 test(esp, Immediate(frame_alignment_mask)); |
| 2771 j(zero, &alignment_as_expected); | 2771 j(zero, &alignment_as_expected); |
| 2772 // Abort if stack is not aligned. | 2772 // Abort if stack is not aligned. |
| 2773 int3(); | 2773 int3(); |
| 2774 bind(&alignment_as_expected); | 2774 bind(&alignment_as_expected); |
| 2775 } | 2775 } |
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| 2992 | 2992 |
| 2993 cmp(index, Immediate(Smi::FromInt(0))); | 2993 cmp(index, Immediate(Smi::FromInt(0))); |
| 2994 Check(greater_equal, kIndexIsNegative); | 2994 Check(greater_equal, kIndexIsNegative); |
| 2995 | 2995 |
| 2996 // Restore the index | 2996 // Restore the index |
| 2997 SmiUntag(index); | 2997 SmiUntag(index); |
| 2998 } | 2998 } |
| 2999 | 2999 |
| 3000 | 3000 |
| 3001 void MacroAssembler::PrepareCallCFunction(int num_arguments, Register scratch) { | 3001 void MacroAssembler::PrepareCallCFunction(int num_arguments, Register scratch) { |
| 3002 int frame_alignment = OS::ActivationFrameAlignment(); | 3002 int frame_alignment = base::OS::ActivationFrameAlignment(); |
| 3003 if (frame_alignment != 0) { | 3003 if (frame_alignment != 0) { |
| 3004 // Make stack end at alignment and make room for num_arguments words | 3004 // Make stack end at alignment and make room for num_arguments words |
| 3005 // and the original value of esp. | 3005 // and the original value of esp. |
| 3006 mov(scratch, esp); | 3006 mov(scratch, esp); |
| 3007 sub(esp, Immediate((num_arguments + 1) * kPointerSize)); | 3007 sub(esp, Immediate((num_arguments + 1) * kPointerSize)); |
| 3008 ASSERT(IsPowerOf2(frame_alignment)); | 3008 ASSERT(IsPowerOf2(frame_alignment)); |
| 3009 and_(esp, -frame_alignment); | 3009 and_(esp, -frame_alignment); |
| 3010 mov(Operand(esp, num_arguments * kPointerSize), scratch); | 3010 mov(Operand(esp, num_arguments * kPointerSize), scratch); |
| 3011 } else { | 3011 } else { |
| 3012 sub(esp, Immediate(num_arguments * kPointerSize)); | 3012 sub(esp, Immediate(num_arguments * kPointerSize)); |
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| 3024 | 3024 |
| 3025 void MacroAssembler::CallCFunction(Register function, | 3025 void MacroAssembler::CallCFunction(Register function, |
| 3026 int num_arguments) { | 3026 int num_arguments) { |
| 3027 ASSERT(has_frame()); | 3027 ASSERT(has_frame()); |
| 3028 // Check stack alignment. | 3028 // Check stack alignment. |
| 3029 if (emit_debug_code()) { | 3029 if (emit_debug_code()) { |
| 3030 CheckStackAlignment(); | 3030 CheckStackAlignment(); |
| 3031 } | 3031 } |
| 3032 | 3032 |
| 3033 call(function); | 3033 call(function); |
| 3034 if (OS::ActivationFrameAlignment() != 0) { | 3034 if (base::OS::ActivationFrameAlignment() != 0) { |
| 3035 mov(esp, Operand(esp, num_arguments * kPointerSize)); | 3035 mov(esp, Operand(esp, num_arguments * kPointerSize)); |
| 3036 } else { | 3036 } else { |
| 3037 add(esp, Immediate(num_arguments * kPointerSize)); | 3037 add(esp, Immediate(num_arguments * kPointerSize)); |
| 3038 } | 3038 } |
| 3039 } | 3039 } |
| 3040 | 3040 |
| 3041 | 3041 |
| 3042 bool AreAliased(Register r1, Register r2, Register r3, Register r4) { | 3042 bool AreAliased(Register r1, Register r2, Register r3, Register r4) { |
| 3043 if (r1.is(r2)) return true; | 3043 if (r1.is(r2)) return true; |
| 3044 if (r1.is(r3)) return true; | 3044 if (r1.is(r3)) return true; |
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| 3056 masm_(NULL, address, size + Assembler::kGap) { | 3056 masm_(NULL, address, size + Assembler::kGap) { |
| 3057 // Create a new macro assembler pointing to the address of the code to patch. | 3057 // Create a new macro assembler pointing to the address of the code to patch. |
| 3058 // The size is adjusted with kGap on order for the assembler to generate size | 3058 // The size is adjusted with kGap on order for the assembler to generate size |
| 3059 // bytes of instructions without failing with buffer size constraints. | 3059 // bytes of instructions without failing with buffer size constraints. |
| 3060 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); | 3060 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 3061 } | 3061 } |
| 3062 | 3062 |
| 3063 | 3063 |
| 3064 CodePatcher::~CodePatcher() { | 3064 CodePatcher::~CodePatcher() { |
| 3065 // Indicate that code has changed. | 3065 // Indicate that code has changed. |
| 3066 CPU::FlushICache(address_, size_); | 3066 CpuFeatures::FlushICache(address_, size_); |
| 3067 | 3067 |
| 3068 // Check that the code was patched as expected. | 3068 // Check that the code was patched as expected. |
| 3069 ASSERT(masm_.pc_ == address_ + size_); | 3069 ASSERT(masm_.pc_ == address_ + size_); |
| 3070 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); | 3070 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 3071 } | 3071 } |
| 3072 | 3072 |
| 3073 | 3073 |
| 3074 void MacroAssembler::CheckPageFlag( | 3074 void MacroAssembler::CheckPageFlag( |
| 3075 Register object, | 3075 Register object, |
| 3076 Register scratch, | 3076 Register scratch, |
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| 3405 if (ms.shift() > 0) sar(edx, ms.shift()); | 3405 if (ms.shift() > 0) sar(edx, ms.shift()); |
| 3406 mov(eax, dividend); | 3406 mov(eax, dividend); |
| 3407 shr(eax, 31); | 3407 shr(eax, 31); |
| 3408 add(edx, eax); | 3408 add(edx, eax); |
| 3409 } | 3409 } |
| 3410 | 3410 |
| 3411 | 3411 |
| 3412 } } // namespace v8::internal | 3412 } } // namespace v8::internal |
| 3413 | 3413 |
| 3414 #endif // V8_TARGET_ARCH_IA32 | 3414 #endif // V8_TARGET_ARCH_IA32 |
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