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1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 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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3835 | 3835 |
3836 __ Move(kScratchRegister, Factory::null_value()); | 3836 __ Move(kScratchRegister, Factory::null_value()); |
3837 __ cmpq(obj.reg(), kScratchRegister); | 3837 __ cmpq(obj.reg(), kScratchRegister); |
3838 destination()->true_target()->Branch(equal); | 3838 destination()->true_target()->Branch(equal); |
3839 | 3839 |
3840 __ movq(kScratchRegister, FieldOperand(obj.reg(), HeapObject::kMapOffset)); | 3840 __ movq(kScratchRegister, FieldOperand(obj.reg(), HeapObject::kMapOffset)); |
3841 // Undetectable objects behave like undefined when tested with typeof. | 3841 // Undetectable objects behave like undefined when tested with typeof. |
3842 __ testb(FieldOperand(kScratchRegister, Map::kBitFieldOffset), | 3842 __ testb(FieldOperand(kScratchRegister, Map::kBitFieldOffset), |
3843 Immediate(1 << Map::kIsUndetectable)); | 3843 Immediate(1 << Map::kIsUndetectable)); |
3844 destination()->false_target()->Branch(not_zero); | 3844 destination()->false_target()->Branch(not_zero); |
3845 __ CmpInstanceType(kScratchRegister, FIRST_JS_OBJECT_TYPE); | 3845 __ movzxbq(kScratchRegister, |
3846 destination()->false_target()->Branch(less); | 3846 FieldOperand(kScratchRegister, Map::kInstanceTypeOffset)); |
3847 __ CmpInstanceType(kScratchRegister, LAST_JS_OBJECT_TYPE); | 3847 __ cmpq(kScratchRegister, Immediate(FIRST_JS_OBJECT_TYPE)); |
| 3848 destination()->false_target()->Branch(below); |
| 3849 __ cmpq(kScratchRegister, Immediate(LAST_JS_OBJECT_TYPE)); |
3848 obj.Unuse(); | 3850 obj.Unuse(); |
3849 destination()->Split(less_equal); | 3851 destination()->Split(below_equal); |
3850 } | 3852 } |
3851 | 3853 |
3852 | 3854 |
3853 void CodeGenerator::GenerateIsFunction(ZoneList<Expression*>* args) { | 3855 void CodeGenerator::GenerateIsFunction(ZoneList<Expression*>* args) { |
3854 // This generates a fast version of: | 3856 // This generates a fast version of: |
3855 // (%_ClassOf(arg) === 'Function') | 3857 // (%_ClassOf(arg) === 'Function') |
3856 ASSERT(args->length() == 1); | 3858 ASSERT(args->length() == 1); |
3857 Load(args->at(0)); | 3859 Load(args->at(0)); |
3858 Result obj = frame_->Pop(); | 3860 Result obj = frame_->Pop(); |
3859 obj.ToRegister(); | 3861 obj.ToRegister(); |
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4331 __ CallRuntime(Runtime::kNumberUnaryMinus, 1); | 4333 __ CallRuntime(Runtime::kNumberUnaryMinus, 1); |
4332 __ movq(rbx, rax); | 4334 __ movq(rbx, rax); |
4333 | 4335 |
4334 __ bind(&heapnumber_allocated); | 4336 __ bind(&heapnumber_allocated); |
4335 | 4337 |
4336 // Return a random uint32 number in rax. | 4338 // Return a random uint32 number in rax. |
4337 // The fresh HeapNumber is in rbx, which is callee-save on both x64 ABIs. | 4339 // The fresh HeapNumber is in rbx, which is callee-save on both x64 ABIs. |
4338 __ PrepareCallCFunction(0); | 4340 __ PrepareCallCFunction(0); |
4339 __ CallCFunction(ExternalReference::random_uint32_function(), 0); | 4341 __ CallCFunction(ExternalReference::random_uint32_function(), 0); |
4340 | 4342 |
4341 // Convert 32 random bits in eax to 0.(32 random bits) in a double | 4343 // Convert 32 random bits in rax to 0.(32 random bits) in a double |
4342 // by computing: | 4344 // by computing: |
4343 // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)). | 4345 // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)). |
4344 __ movl(rcx, Immediate(0x49800000)); // 1.0 x 2^20 as single. | 4346 __ movl(rcx, Immediate(0x49800000)); // 1.0 x 2^20 as single. |
4345 __ movd(xmm1, rcx); | 4347 __ movd(xmm1, rcx); |
4346 __ movd(xmm0, rax); | 4348 __ movd(xmm0, rax); |
4347 __ cvtss2sd(xmm1, xmm1); | 4349 __ cvtss2sd(xmm1, xmm1); |
4348 __ xorpd(xmm0, xmm1); | 4350 __ xorpd(xmm0, xmm1); |
4349 __ subsd(xmm0, xmm1); | 4351 __ subsd(xmm0, xmm1); |
4350 __ movsd(FieldOperand(rbx, HeapNumber::kValueOffset), xmm0); | 4352 __ movsd(FieldOperand(rbx, HeapNumber::kValueOffset), xmm0); |
4351 | 4353 |
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11592 } | 11594 } |
11593 | 11595 |
11594 #endif | 11596 #endif |
11595 | 11597 |
11596 | 11598 |
11597 #undef __ | 11599 #undef __ |
11598 | 11600 |
11599 } } // namespace v8::internal | 11601 } } // namespace v8::internal |
11600 | 11602 |
11601 #endif // V8_TARGET_ARCH_X64 | 11603 #endif // V8_TARGET_ARCH_X64 |
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