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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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| 3413 DeferredDoRandom* deferred = new(zone()) DeferredDoRandom(this, instr); | 3413 DeferredDoRandom* deferred = new(zone()) DeferredDoRandom(this, instr); |
| 3414 | 3414 |
| 3415 // Having marked this instruction as a call we can use any | 3415 // Having marked this instruction as a call we can use any |
| 3416 // registers. | 3416 // registers. |
| 3417 ASSERT(ToDoubleRegister(instr->result()).is(xmm1)); | 3417 ASSERT(ToDoubleRegister(instr->result()).is(xmm1)); |
| 3418 ASSERT(ToRegister(instr->InputAt(0)).is(eax)); | 3418 ASSERT(ToRegister(instr->InputAt(0)).is(eax)); |
| 3419 // Assert that the register size is indeed the size of each seed. | 3419 // Assert that the register size is indeed the size of each seed. |
| 3420 static const int kSeedSize = sizeof(uint32_t); | 3420 static const int kSeedSize = sizeof(uint32_t); |
| 3421 STATIC_ASSERT(kPointerSize == kSeedSize); | 3421 STATIC_ASSERT(kPointerSize == kSeedSize); |
| 3422 | 3422 |
| 3423 __ mov(eax, FieldOperand(eax, GlobalObject::kGlobalContextOffset)); | 3423 __ mov(eax, FieldOperand(eax, GlobalObject::kNativeContextOffset)); |
| 3424 static const int kRandomSeedOffset = | 3424 static const int kRandomSeedOffset = |
| 3425 FixedArray::kHeaderSize + Context::RANDOM_SEED_INDEX * kPointerSize; | 3425 FixedArray::kHeaderSize + Context::RANDOM_SEED_INDEX * kPointerSize; |
| 3426 __ mov(ebx, FieldOperand(eax, kRandomSeedOffset)); | 3426 __ mov(ebx, FieldOperand(eax, kRandomSeedOffset)); |
| 3427 // ebx: FixedArray of the global context's random seeds | 3427 // ebx: FixedArray of the native context's random seeds |
| 3428 | 3428 |
| 3429 // Load state[0]. | 3429 // Load state[0]. |
| 3430 __ mov(ecx, FieldOperand(ebx, ByteArray::kHeaderSize)); | 3430 __ mov(ecx, FieldOperand(ebx, ByteArray::kHeaderSize)); |
| 3431 // If state[0] == 0, call runtime to initialize seeds. | 3431 // If state[0] == 0, call runtime to initialize seeds. |
| 3432 __ test(ecx, ecx); | 3432 __ test(ecx, ecx); |
| 3433 __ j(zero, deferred->entry()); | 3433 __ j(zero, deferred->entry()); |
| 3434 // Load state[1]. | 3434 // Load state[1]. |
| 3435 __ mov(eax, FieldOperand(ebx, ByteArray::kHeaderSize + kSeedSize)); | 3435 __ mov(eax, FieldOperand(ebx, ByteArray::kHeaderSize + kSeedSize)); |
| 3436 // ecx: state[0] | 3436 // ecx: state[0] |
| 3437 // eax: state[1] | 3437 // eax: state[1] |
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| 5422 FixedArray::kHeaderSize - kPointerSize)); | 5422 FixedArray::kHeaderSize - kPointerSize)); |
| 5423 __ bind(&done); | 5423 __ bind(&done); |
| 5424 } | 5424 } |
| 5425 | 5425 |
| 5426 | 5426 |
| 5427 #undef __ | 5427 #undef __ |
| 5428 | 5428 |
| 5429 } } // namespace v8::internal | 5429 } } // namespace v8::internal |
| 5430 | 5430 |
| 5431 #endif // V8_TARGET_ARCH_IA32 | 5431 #endif // V8_TARGET_ARCH_IA32 |
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