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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/base/division-by-constant.h" | 10 #include "src/base/division-by-constant.h" |
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1710 void MacroAssembler::InitializeFieldsWithFiller(Register start_offset, | 1710 void MacroAssembler::InitializeFieldsWithFiller(Register start_offset, |
1711 Register end_offset, | 1711 Register end_offset, |
1712 Register filler) { | 1712 Register filler) { |
1713 Label loop, entry; | 1713 Label loop, entry; |
1714 jmp(&entry); | 1714 jmp(&entry); |
1715 bind(&loop); | 1715 bind(&loop); |
1716 mov(Operand(start_offset, 0), filler); | 1716 mov(Operand(start_offset, 0), filler); |
1717 add(start_offset, Immediate(kPointerSize)); | 1717 add(start_offset, Immediate(kPointerSize)); |
1718 bind(&entry); | 1718 bind(&entry); |
1719 cmp(start_offset, end_offset); | 1719 cmp(start_offset, end_offset); |
1720 j(less, &loop); | 1720 j(below, &loop); |
1721 } | 1721 } |
1722 | 1722 |
1723 | 1723 |
1724 void MacroAssembler::BooleanBitTest(Register object, | 1724 void MacroAssembler::BooleanBitTest(Register object, |
1725 int field_offset, | 1725 int field_offset, |
1726 int bit_index) { | 1726 int bit_index) { |
1727 bit_index += kSmiTagSize + kSmiShiftSize; | 1727 bit_index += kSmiTagSize + kSmiShiftSize; |
1728 DCHECK(base::bits::IsPowerOfTwo32(kBitsPerByte)); | 1728 DCHECK(base::bits::IsPowerOfTwo32(kBitsPerByte)); |
1729 int byte_index = bit_index / kBitsPerByte; | 1729 int byte_index = bit_index / kBitsPerByte; |
1730 int byte_bit_index = bit_index & (kBitsPerByte - 1); | 1730 int byte_bit_index = bit_index & (kBitsPerByte - 1); |
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3101 mov(eax, dividend); | 3101 mov(eax, dividend); |
3102 shr(eax, 31); | 3102 shr(eax, 31); |
3103 add(edx, eax); | 3103 add(edx, eax); |
3104 } | 3104 } |
3105 | 3105 |
3106 | 3106 |
3107 } // namespace internal | 3107 } // namespace internal |
3108 } // namespace v8 | 3108 } // namespace v8 |
3109 | 3109 |
3110 #endif // V8_TARGET_ARCH_X87 | 3110 #endif // V8_TARGET_ARCH_X87 |
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