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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_X87 | 7 #if V8_TARGET_ARCH_X87 |
8 | 8 |
9 #include "src/base/bits.h" | 9 #include "src/base/bits.h" |
10 #include "src/code-factory.h" | 10 #include "src/code-factory.h" |
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4014 X87Register input_reg = ToX87Register(instr->value()); | 4014 X87Register input_reg = ToX87Register(instr->value()); |
4015 X87Fxch(input_reg); | 4015 X87Fxch(input_reg); |
4016 __ sub(esp, Immediate(kPointerSize)); | 4016 __ sub(esp, Immediate(kPointerSize)); |
4017 __ fstp_s(MemOperand(esp, 0)); | 4017 __ fstp_s(MemOperand(esp, 0)); |
4018 X87Fld(MemOperand(esp, 0), kX87FloatOperand); | 4018 X87Fld(MemOperand(esp, 0), kX87FloatOperand); |
4019 __ add(esp, Immediate(kPointerSize)); | 4019 __ add(esp, Immediate(kPointerSize)); |
4020 } | 4020 } |
4021 | 4021 |
4022 | 4022 |
4023 void LCodeGen::DoMathSqrt(LMathSqrt* instr) { | 4023 void LCodeGen::DoMathSqrt(LMathSqrt* instr) { |
4024 X87Register input_reg = ToX87Register(instr->value()); | 4024 X87Register input = ToX87Register(instr->value()); |
4025 X87Register output_reg = ToX87Register(instr->result()); | 4025 X87Register result_reg = ToX87Register(instr->result()); |
4026 DCHECK(output_reg.is(input_reg)); | 4026 Register temp_result = ToRegister(instr->temp1()); |
4027 USE(output_reg); | 4027 Register temp = ToRegister(instr->temp2()); |
4028 X87Fxch(input_reg); | 4028 Label slow, done, smi, finish; |
4029 __ fsqrt(); | 4029 DCHECK(result_reg.is(input)); |
| 4030 |
| 4031 // Store input into Heap number and call runtime function kMathExpRT. |
| 4032 if (FLAG_inline_new) { |
| 4033 __ AllocateHeapNumber(temp_result, temp, no_reg, &slow); |
| 4034 __ jmp(&done, Label::kNear); |
| 4035 } |
| 4036 |
| 4037 // Slow case: Call the runtime system to do the number allocation. |
| 4038 __ bind(&slow); |
| 4039 { |
| 4040 // TODO(3095996): Put a valid pointer value in the stack slot where the |
| 4041 // result register is stored, as this register is in the pointer map, but |
| 4042 // contains an integer value. |
| 4043 __ Move(temp_result, Immediate(0)); |
| 4044 |
| 4045 // Preserve the value of all registers. |
| 4046 PushSafepointRegistersScope scope(this); |
| 4047 |
| 4048 __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 4049 __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber); |
| 4050 RecordSafepointWithRegisters( |
| 4051 instr->pointer_map(), 0, Safepoint::kNoLazyDeopt); |
| 4052 __ StoreToSafepointRegisterSlot(temp_result, eax); |
| 4053 } |
| 4054 __ bind(&done); |
| 4055 X87LoadForUsage(input); |
| 4056 __ fstp_d(FieldOperand(temp_result, HeapNumber::kValueOffset)); |
| 4057 |
| 4058 { |
| 4059 // Preserve the value of all registers. |
| 4060 PushSafepointRegistersScope scope(this); |
| 4061 |
| 4062 __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 4063 __ push(temp_result); |
| 4064 __ CallRuntimeSaveDoubles(Runtime::kMathSqrtRT); |
| 4065 RecordSafepointWithRegisters( |
| 4066 instr->pointer_map(), 0, Safepoint::kNoLazyDeopt); |
| 4067 __ StoreToSafepointRegisterSlot(temp_result, eax); |
| 4068 } |
| 4069 X87PrepareToWrite(result_reg); |
| 4070 // return value of MathSqrtRT is Smi or Heap Number. |
| 4071 __ JumpIfSmi(temp_result, &smi); |
| 4072 // Heap number(double) |
| 4073 __ fld_d(FieldOperand(temp_result, HeapNumber::kValueOffset)); |
| 4074 __ jmp(&finish); |
| 4075 // SMI |
| 4076 __ bind(&smi); |
| 4077 __ SmiUntag(temp_result); |
| 4078 __ push(temp_result); |
| 4079 __ fild_s(MemOperand(esp, 0)); |
| 4080 __ pop(temp_result); |
| 4081 __ bind(&finish); |
| 4082 X87CommitWrite(result_reg); |
4030 } | 4083 } |
4031 | 4084 |
4032 | 4085 |
4033 void LCodeGen::DoMathPowHalf(LMathPowHalf* instr) { | 4086 void LCodeGen::DoMathPowHalf(LMathPowHalf* instr) { |
4034 X87Register input_reg = ToX87Register(instr->value()); | 4087 X87Register input_reg = ToX87Register(instr->value()); |
4035 DCHECK(ToX87Register(instr->result()).is(input_reg)); | 4088 DCHECK(ToX87Register(instr->result()).is(input_reg)); |
4036 X87Fxch(input_reg); | 4089 X87Fxch(input_reg); |
4037 // Note that according to ECMA-262 15.8.2.13: | 4090 // Note that according to ECMA-262 15.8.2.13: |
4038 // Math.pow(-Infinity, 0.5) == Infinity | 4091 // Math.pow(-Infinity, 0.5) == Infinity |
4039 // Math.sqrt(-Infinity) == NaN | 4092 // Math.sqrt(-Infinity) == NaN |
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6243 CallRuntime(Runtime::kPushBlockContext, 2, instr); | 6296 CallRuntime(Runtime::kPushBlockContext, 2, instr); |
6244 RecordSafepoint(Safepoint::kNoLazyDeopt); | 6297 RecordSafepoint(Safepoint::kNoLazyDeopt); |
6245 } | 6298 } |
6246 | 6299 |
6247 | 6300 |
6248 #undef __ | 6301 #undef __ |
6249 | 6302 |
6250 } } // namespace v8::internal | 6303 } } // namespace v8::internal |
6251 | 6304 |
6252 #endif // V8_TARGET_ARCH_X87 | 6305 #endif // V8_TARGET_ARCH_X87 |
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