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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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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70 // Compute number of region covering addr. See Page::GetRegionNumberForAddress | 70 // Compute number of region covering addr. See Page::GetRegionNumberForAddress |
71 // method for more details. | 71 // method for more details. |
72 and_(addr, Page::kPageAlignmentMask); | 72 and_(addr, Page::kPageAlignmentMask); |
73 shr(addr, Page::kRegionSizeLog2); | 73 shr(addr, Page::kRegionSizeLog2); |
74 | 74 |
75 // Set dirty mark for region. | 75 // Set dirty mark for region. |
76 bts(Operand(object, Page::kDirtyFlagOffset), addr); | 76 bts(Operand(object, Page::kDirtyFlagOffset), addr); |
77 } | 77 } |
78 | 78 |
79 | 79 |
| 80 void MacroAssembler::ClampDoubleToUint8(XMMRegister input_reg, |
| 81 XMMRegister scratch_reg, |
| 82 Register result_reg) { |
| 83 Label above_zero; |
| 84 Label done; |
| 85 Label in_bounds; |
| 86 ExternalReference zero = ExternalReference::address_of_zero(); |
| 87 movdbl(scratch_reg, Operand::StaticVariable(zero)); |
| 88 ucomisd(input_reg, scratch_reg); |
| 89 j(above, &above_zero, Label::kNear); |
| 90 Set(result_reg, Immediate(0)); |
| 91 jmp(&done, Label::kNear); |
| 92 bind(&above_zero); |
| 93 ExternalReference uint8_max_value = |
| 94 ExternalReference::address_of_uint8_max_value(); |
| 95 movdbl(scratch_reg, Operand::StaticVariable(uint8_max_value)); |
| 96 ucomisd(input_reg, scratch_reg); |
| 97 j(below_equal, &in_bounds, Label::kNear); |
| 98 Set(result_reg, Immediate(255)); |
| 99 jmp(&done, Label::kNear); |
| 100 bind(&in_bounds); |
| 101 ExternalReference one_half = |
| 102 ExternalReference::address_of_one_half(); |
| 103 movdbl(scratch_reg, Operand::StaticVariable(one_half)); |
| 104 addsd(scratch_reg, input_reg); |
| 105 cvttsd2si(result_reg, Operand(scratch_reg)); |
| 106 bind(&done); |
| 107 } |
| 108 |
| 109 |
| 110 void MacroAssembler::ClampUint8(Register reg) { |
| 111 Label done; |
| 112 test(reg, Immediate(0xFFFFFF00)); |
| 113 j(zero, &done, Label::kNear); |
| 114 setcc(negative, reg); // 1 if negative, 0 if positive. |
| 115 dec_b(reg); // 0 if negative, 255 if positive. |
| 116 bind(&done); |
| 117 } |
| 118 |
| 119 |
80 void MacroAssembler::InNewSpace(Register object, | 120 void MacroAssembler::InNewSpace(Register object, |
81 Register scratch, | 121 Register scratch, |
82 Condition cc, | 122 Condition cc, |
83 Label* branch, | 123 Label* branch, |
84 Label::Distance branch_near) { | 124 Label::Distance branch_near) { |
85 ASSERT(cc == equal || cc == not_equal); | 125 ASSERT(cc == equal || cc == not_equal); |
86 if (Serializer::enabled()) { | 126 if (Serializer::enabled()) { |
87 // Can't do arithmetic on external references if it might get serialized. | 127 // Can't do arithmetic on external references if it might get serialized. |
88 mov(scratch, Operand(object)); | 128 mov(scratch, Operand(object)); |
89 // The mask isn't really an address. We load it as an external reference in | 129 // The mask isn't really an address. We load it as an external reference in |
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2039 | 2079 |
2040 // Check that the code was patched as expected. | 2080 // Check that the code was patched as expected. |
2041 ASSERT(masm_.pc_ == address_ + size_); | 2081 ASSERT(masm_.pc_ == address_ + size_); |
2042 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); | 2082 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
2043 } | 2083 } |
2044 | 2084 |
2045 | 2085 |
2046 } } // namespace v8::internal | 2086 } } // namespace v8::internal |
2047 | 2087 |
2048 #endif // V8_TARGET_ARCH_IA32 | 2088 #endif // V8_TARGET_ARCH_IA32 |
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