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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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1857 } | 1857 } |
1858 | 1858 |
1859 | 1859 |
1860 void LCodeGen::DoMapEnumLength(LMapEnumLength* instr) { | 1860 void LCodeGen::DoMapEnumLength(LMapEnumLength* instr) { |
1861 Register result = ToRegister(instr->result()); | 1861 Register result = ToRegister(instr->result()); |
1862 Register map = ToRegister(instr->value()); | 1862 Register map = ToRegister(instr->value()); |
1863 __ EnumLength(result, map); | 1863 __ EnumLength(result, map); |
1864 } | 1864 } |
1865 | 1865 |
1866 | 1866 |
1867 void LCodeGen::DoElementsKind(LElementsKind* instr) { | |
1868 Register result = ToRegister(instr->result()); | |
1869 Register input = ToRegister(instr->value()); | |
1870 | |
1871 // Load map into |result|. | |
1872 __ ldr(result, FieldMemOperand(input, HeapObject::kMapOffset)); | |
1873 // Load the map's "bit field 2" into |result|. We only need the first byte, | |
1874 // but the following bit field extraction takes care of that anyway. | |
1875 __ ldr(result, FieldMemOperand(result, Map::kBitField2Offset)); | |
1876 // Retrieve elements_kind from bit field 2. | |
1877 __ ubfx(result, result, Map::kElementsKindShift, Map::kElementsKindBitCount); | |
1878 } | |
1879 | |
1880 | |
1881 void LCodeGen::DoValueOf(LValueOf* instr) { | 1867 void LCodeGen::DoValueOf(LValueOf* instr) { |
1882 Register input = ToRegister(instr->value()); | 1868 Register input = ToRegister(instr->value()); |
1883 Register result = ToRegister(instr->result()); | 1869 Register result = ToRegister(instr->result()); |
1884 Register map = ToRegister(instr->temp()); | 1870 Register map = ToRegister(instr->temp()); |
1885 Label done; | 1871 Label done; |
1886 | 1872 |
1887 if (!instr->hydrogen()->value()->IsHeapObject()) { | 1873 if (!instr->hydrogen()->value()->IsHeapObject()) { |
1888 // If the object is a smi return the object. | 1874 // If the object is a smi return the object. |
1889 __ SmiTst(input); | 1875 __ SmiTst(input); |
1890 __ Move(result, input, eq); | 1876 __ Move(result, input, eq); |
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5790 __ sub(scratch, result, Operand::PointerOffsetFromSmiKey(index)); | 5776 __ sub(scratch, result, Operand::PointerOffsetFromSmiKey(index)); |
5791 __ ldr(result, FieldMemOperand(scratch, | 5777 __ ldr(result, FieldMemOperand(scratch, |
5792 FixedArray::kHeaderSize - kPointerSize)); | 5778 FixedArray::kHeaderSize - kPointerSize)); |
5793 __ bind(&done); | 5779 __ bind(&done); |
5794 } | 5780 } |
5795 | 5781 |
5796 | 5782 |
5797 #undef __ | 5783 #undef __ |
5798 | 5784 |
5799 } } // namespace v8::internal | 5785 } } // namespace v8::internal |
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