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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 #if V8_TARGET_ARCH_X87 | 5 #if V8_TARGET_ARCH_X87 |
6 | 6 |
7 #include "src/crankshaft/x87/lithium-codegen-x87.h" | 7 #include "src/crankshaft/x87/lithium-codegen-x87.h" |
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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3341 } | 3341 } |
3342 | 3342 |
3343 | 3343 |
3344 void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LMathAbs* instr) { | 3344 void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LMathAbs* instr) { |
3345 Register input_reg = ToRegister(instr->value()); | 3345 Register input_reg = ToRegister(instr->value()); |
3346 __ cmp(FieldOperand(input_reg, HeapObject::kMapOffset), | 3346 __ cmp(FieldOperand(input_reg, HeapObject::kMapOffset), |
3347 factory()->heap_number_map()); | 3347 factory()->heap_number_map()); |
3348 DeoptimizeIf(not_equal, instr, Deoptimizer::kNotAHeapNumber); | 3348 DeoptimizeIf(not_equal, instr, Deoptimizer::kNotAHeapNumber); |
3349 | 3349 |
3350 Label slow, allocated, done; | 3350 Label slow, allocated, done; |
3351 Register tmp = input_reg.is(eax) ? ecx : eax; | 3351 uint32_t available_regs = 0xf; |
3352 Register tmp2 = tmp.is(ecx) ? edx : input_reg.is(ecx) ? edx : ecx; | 3352 if (input_reg.code() < 4) available_regs ^= input_reg.bit(); |
3353 if (instr->context()->IsRegister()) { | |
3354 // Make sure that the context isn't overwritten in the AllocateHeapNumber | |
3355 // macro below. | |
3356 Register context_reg = ToRegister(instr->context()); | |
3357 if (context_reg.code() < 4) available_regs ^= context_reg.bit(); | |
3358 } | |
3359 | |
3360 Register tmp = | |
3361 Register::from_code(base::bits::CountTrailingZeros32(available_regs)); | |
3362 available_regs ^= tmp.bit(); | |
3363 Register tmp2 = | |
3364 Register::from_code(base::bits::CountTrailingZeros32(available_regs)); | |
Jarin
2016/06/03 19:08:17
I am not quite happy about hardcoding the integer
| |
3353 | 3365 |
3354 // Preserve the value of all registers. | 3366 // Preserve the value of all registers. |
3355 PushSafepointRegistersScope scope(this); | 3367 PushSafepointRegistersScope scope(this); |
3356 | 3368 |
3357 __ mov(tmp, FieldOperand(input_reg, HeapNumber::kExponentOffset)); | 3369 __ mov(tmp, FieldOperand(input_reg, HeapNumber::kExponentOffset)); |
3358 // Check the sign of the argument. If the argument is positive, just | 3370 // Check the sign of the argument. If the argument is positive, just |
3359 // return it. We do not need to patch the stack since |input| and | 3371 // return it. We do not need to patch the stack since |input| and |
3360 // |result| are the same register and |input| will be restored | 3372 // |result| are the same register and |input| will be restored |
3361 // unchanged by popping safepoint registers. | 3373 // unchanged by popping safepoint registers. |
3362 __ test(tmp, Immediate(HeapNumber::kSignMask)); | 3374 __ test(tmp, Immediate(HeapNumber::kSignMask)); |
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5856 __ bind(deferred->exit()); | 5868 __ bind(deferred->exit()); |
5857 __ bind(&done); | 5869 __ bind(&done); |
5858 } | 5870 } |
5859 | 5871 |
5860 #undef __ | 5872 #undef __ |
5861 | 5873 |
5862 } // namespace internal | 5874 } // namespace internal |
5863 } // namespace v8 | 5875 } // namespace v8 |
5864 | 5876 |
5865 #endif // V8_TARGET_ARCH_X87 | 5877 #endif // V8_TARGET_ARCH_X87 |
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