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1 // Copyright 2012 the V8 project authors. All rights reserved.7 | 1 // Copyright 2012 the V8 project authors. All rights reserved.7 |
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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1644 } | 1644 } |
1645 | 1645 |
1646 | 1646 |
1647 void LCodeGen::DoMapEnumLength(LMapEnumLength* instr) { | 1647 void LCodeGen::DoMapEnumLength(LMapEnumLength* instr) { |
1648 Register result = ToRegister(instr->result()); | 1648 Register result = ToRegister(instr->result()); |
1649 Register map = ToRegister(instr->value()); | 1649 Register map = ToRegister(instr->value()); |
1650 __ EnumLength(result, map); | 1650 __ EnumLength(result, map); |
1651 } | 1651 } |
1652 | 1652 |
1653 | 1653 |
1654 void LCodeGen::DoElementsKind(LElementsKind* instr) { | |
1655 Register result = ToRegister(instr->result()); | |
1656 Register input = ToRegister(instr->value()); | |
1657 | |
1658 // Load map into |result|. | |
1659 __ lw(result, FieldMemOperand(input, HeapObject::kMapOffset)); | |
1660 // Load the map's "bit field 2" into |result|. We only need the first byte, | |
1661 // but the following bit field extraction takes care of that anyway. | |
1662 __ lbu(result, FieldMemOperand(result, Map::kBitField2Offset)); | |
1663 // Retrieve elements_kind from bit field 2. | |
1664 __ Ext(result, result, Map::kElementsKindShift, Map::kElementsKindBitCount); | |
1665 } | |
1666 | |
1667 | |
1668 void LCodeGen::DoValueOf(LValueOf* instr) { | 1654 void LCodeGen::DoValueOf(LValueOf* instr) { |
1669 Register input = ToRegister(instr->value()); | 1655 Register input = ToRegister(instr->value()); |
1670 Register result = ToRegister(instr->result()); | 1656 Register result = ToRegister(instr->result()); |
1671 Register map = ToRegister(instr->temp()); | 1657 Register map = ToRegister(instr->temp()); |
1672 Label done; | 1658 Label done; |
1673 | 1659 |
1674 if (!instr->hydrogen()->value()->IsHeapObject()) { | 1660 if (!instr->hydrogen()->value()->IsHeapObject()) { |
1675 // If the object is a smi return the object. | 1661 // If the object is a smi return the object. |
1676 __ Move(result, input); | 1662 __ Move(result, input); |
1677 __ JumpIfSmi(input, &done); | 1663 __ JumpIfSmi(input, &done); |
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5780 __ Subu(scratch, result, scratch); | 5766 __ Subu(scratch, result, scratch); |
5781 __ lw(result, FieldMemOperand(scratch, | 5767 __ lw(result, FieldMemOperand(scratch, |
5782 FixedArray::kHeaderSize - kPointerSize)); | 5768 FixedArray::kHeaderSize - kPointerSize)); |
5783 __ bind(&done); | 5769 __ bind(&done); |
5784 } | 5770 } |
5785 | 5771 |
5786 | 5772 |
5787 #undef __ | 5773 #undef __ |
5788 | 5774 |
5789 } } // namespace v8::internal | 5775 } } // namespace v8::internal |
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