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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 // 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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3303 // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)). | 3303 // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)). |
3304 // This is implemented on both SSE2 and FPU. | 3304 // This is implemented on both SSE2 and FPU. |
3305 if (CpuFeatures::IsSupported(SSE2)) { | 3305 if (CpuFeatures::IsSupported(SSE2)) { |
3306 CpuFeatureScope fscope(masm(), SSE2); | 3306 CpuFeatureScope fscope(masm(), SSE2); |
3307 __ mov(ebx, Immediate(0x49800000)); // 1.0 x 2^20 as single. | 3307 __ mov(ebx, Immediate(0x49800000)); // 1.0 x 2^20 as single. |
3308 __ movd(xmm1, ebx); | 3308 __ movd(xmm1, ebx); |
3309 __ movd(xmm0, eax); | 3309 __ movd(xmm0, eax); |
3310 __ cvtss2sd(xmm1, xmm1); | 3310 __ cvtss2sd(xmm1, xmm1); |
3311 __ xorps(xmm0, xmm1); | 3311 __ xorps(xmm0, xmm1); |
3312 __ subsd(xmm0, xmm1); | 3312 __ subsd(xmm0, xmm1); |
3313 __ movdbl(FieldOperand(edi, HeapNumber::kValueOffset), xmm0); | 3313 __ movsd(FieldOperand(edi, HeapNumber::kValueOffset), xmm0); |
3314 } else { | 3314 } else { |
3315 // 0x4130000000000000 is 1.0 x 2^20 as a double. | 3315 // 0x4130000000000000 is 1.0 x 2^20 as a double. |
3316 __ mov(FieldOperand(edi, HeapNumber::kExponentOffset), | 3316 __ mov(FieldOperand(edi, HeapNumber::kExponentOffset), |
3317 Immediate(0x41300000)); | 3317 Immediate(0x41300000)); |
3318 __ mov(FieldOperand(edi, HeapNumber::kMantissaOffset), eax); | 3318 __ mov(FieldOperand(edi, HeapNumber::kMantissaOffset), eax); |
3319 __ fld_d(FieldOperand(edi, HeapNumber::kValueOffset)); | 3319 __ fld_d(FieldOperand(edi, HeapNumber::kValueOffset)); |
3320 __ mov(FieldOperand(edi, HeapNumber::kMantissaOffset), Immediate(0)); | 3320 __ mov(FieldOperand(edi, HeapNumber::kMantissaOffset), Immediate(0)); |
3321 __ fld_d(FieldOperand(edi, HeapNumber::kValueOffset)); | 3321 __ fld_d(FieldOperand(edi, HeapNumber::kValueOffset)); |
3322 __ fsubp(1); | 3322 __ fsubp(1); |
3323 __ fstp_d(FieldOperand(edi, HeapNumber::kValueOffset)); | 3323 __ fstp_d(FieldOperand(edi, HeapNumber::kValueOffset)); |
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4960 | 4960 |
4961 ASSERT_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(), | 4961 ASSERT_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(), |
4962 Assembler::target_address_at(call_target_address)); | 4962 Assembler::target_address_at(call_target_address)); |
4963 return OSR_AFTER_STACK_CHECK; | 4963 return OSR_AFTER_STACK_CHECK; |
4964 } | 4964 } |
4965 | 4965 |
4966 | 4966 |
4967 } } // namespace v8::internal | 4967 } } // namespace v8::internal |
4968 | 4968 |
4969 #endif // V8_TARGET_ARCH_IA32 | 4969 #endif // V8_TARGET_ARCH_IA32 |
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