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1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 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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5585 // Smi-tagging is equivalent to multiplying by 2. | 5585 // Smi-tagging is equivalent to multiplying by 2. |
5586 STATIC_ASSERT(kSmiTag == 0); | 5586 STATIC_ASSERT(kSmiTag == 0); |
5587 STATIC_ASSERT(kSmiTagSize == 1); | 5587 STATIC_ASSERT(kSmiTagSize == 1); |
5588 | 5588 |
5589 // Check that both indices are smis. | 5589 // Check that both indices are smis. |
5590 __ mov(tmp2, index1); | 5590 __ mov(tmp2, index1); |
5591 __ orr(tmp2, tmp2, index2); | 5591 __ orr(tmp2, tmp2, index2); |
5592 __ tst(tmp2, Operand(kSmiTagMask)); | 5592 __ tst(tmp2, Operand(kSmiTagMask)); |
5593 deferred->Branch(nz); | 5593 deferred->Branch(nz); |
5594 | 5594 |
| 5595 // Check that both indices are valid. |
| 5596 __ ldr(tmp2, FieldMemOperand(object, JSArray::kLengthOffset)); |
| 5597 __ cmp(tmp2, index1); |
| 5598 __ cmp(tmp2, index2, hi); |
| 5599 deferred->Branch(ls); |
| 5600 |
5595 // Bring the offsets into the fixed array in tmp1 into index1 and | 5601 // Bring the offsets into the fixed array in tmp1 into index1 and |
5596 // index2. | 5602 // index2. |
5597 __ mov(tmp2, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); | 5603 __ mov(tmp2, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
5598 __ add(index1, tmp2, Operand(index1, LSL, kPointerSizeLog2 - kSmiTagSize)); | 5604 __ add(index1, tmp2, Operand(index1, LSL, kPointerSizeLog2 - kSmiTagSize)); |
5599 __ add(index2, tmp2, Operand(index2, LSL, kPointerSizeLog2 - kSmiTagSize)); | 5605 __ add(index2, tmp2, Operand(index2, LSL, kPointerSizeLog2 - kSmiTagSize)); |
5600 | 5606 |
5601 // Swap elements. | 5607 // Swap elements. |
5602 Register tmp3 = object; | 5608 Register tmp3 = object; |
5603 object = no_reg; | 5609 object = no_reg; |
5604 __ ldr(tmp3, MemOperand(tmp1, index1)); | 5610 __ ldr(tmp3, MemOperand(tmp1, index1)); |
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7364 BinaryOpIC::GetName(runtime_operands_type_)); | 7370 BinaryOpIC::GetName(runtime_operands_type_)); |
7365 return name_; | 7371 return name_; |
7366 } | 7372 } |
7367 | 7373 |
7368 | 7374 |
7369 #undef __ | 7375 #undef __ |
7370 | 7376 |
7371 } } // namespace v8::internal | 7377 } } // namespace v8::internal |
7372 | 7378 |
7373 #endif // V8_TARGET_ARCH_ARM | 7379 #endif // V8_TARGET_ARCH_ARM |
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