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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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| 4573 | 4573 |
| 4574 // Compare loop. | 4574 // Compare loop. |
| 4575 NearLabel result_not_equal; | 4575 NearLabel result_not_equal; |
| 4576 GenerateAsciiCharsCompareLoop(masm, left, right, min_length, scratch2, | 4576 GenerateAsciiCharsCompareLoop(masm, left, right, min_length, scratch2, |
| 4577 &result_not_equal); | 4577 &result_not_equal); |
| 4578 | 4578 |
| 4579 // Completed loop without finding different characters. | 4579 // Completed loop without finding different characters. |
| 4580 // Compare lengths (precomputed). | 4580 // Compare lengths (precomputed). |
| 4581 __ bind(&compare_lengths); | 4581 __ bind(&compare_lengths); |
| 4582 __ SmiTest(length_difference); | 4582 __ SmiTest(length_difference); |
| 4583 __ j(not_zero, &result_not_equal, Label::kNear); | 4583 __ j(not_zero, &result_not_equal); |
| 4584 | 4584 |
| 4585 // Result is EQUAL. | 4585 // Result is EQUAL. |
| 4586 __ Move(rax, Smi::FromInt(EQUAL)); | 4586 __ Move(rax, Smi::FromInt(EQUAL)); |
| 4587 __ ret(0); | 4587 __ ret(0); |
| 4588 | 4588 |
| 4589 Label result_greater; | 4589 Label result_greater; |
| 4590 __ bind(&result_not_equal); | 4590 __ bind(&result_not_equal); |
| 4591 // Unequal comparison of left to right, either character or length. | 4591 // Unequal comparison of left to right, either character or length. |
| 4592 __ j(greater, &result_greater, Label::kNear); | 4592 __ j(greater, &result_greater, Label::kNear); |
| 4593 | 4593 |
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| 5104 __ Drop(1); | 5104 __ Drop(1); |
| 5105 __ ret(2 * kPointerSize); | 5105 __ ret(2 * kPointerSize); |
| 5106 } | 5106 } |
| 5107 | 5107 |
| 5108 | 5108 |
| 5109 #undef __ | 5109 #undef __ |
| 5110 | 5110 |
| 5111 } } // namespace v8::internal | 5111 } } // namespace v8::internal |
| 5112 | 5112 |
| 5113 #endif // V8_TARGET_ARCH_X64 | 5113 #endif // V8_TARGET_ARCH_X64 |
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