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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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651 // Equality is almost reflexive (everything but NaN), so this is a test | 651 // Equality is almost reflexive (everything but NaN), so this is a test |
652 // for "identity and not NaN". | 652 // for "identity and not NaN". |
653 static void EmitIdenticalObjectComparison(MacroAssembler* masm, | 653 static void EmitIdenticalObjectComparison(MacroAssembler* masm, |
654 Label* slow, | 654 Label* slow, |
655 Condition cond) { | 655 Condition cond) { |
656 Label not_identical; | 656 Label not_identical; |
657 Label heap_number, return_equal; | 657 Label heap_number, return_equal; |
658 __ cmp(r0, r1); | 658 __ cmp(r0, r1); |
659 __ b(ne, ¬_identical); | 659 __ b(ne, ¬_identical); |
660 | 660 |
661 // Test for NaN. Sadly, we can't just compare to FACTORY->nan_value(), | 661 // Test for NaN. Sadly, we can't just compare to Factory::nan_value(), |
662 // so we do the second best thing - test it ourselves. | 662 // so we do the second best thing - test it ourselves. |
663 // They are both equal and they are not both Smis so both of them are not | 663 // They are both equal and they are not both Smis so both of them are not |
664 // Smis. If it's not a heap number, then return equal. | 664 // Smis. If it's not a heap number, then return equal. |
665 if (cond == lt || cond == gt) { | 665 if (cond == lt || cond == gt) { |
666 __ CompareObjectType(r0, r4, r4, FIRST_SPEC_OBJECT_TYPE); | 666 __ CompareObjectType(r0, r4, r4, FIRST_SPEC_OBJECT_TYPE); |
667 __ b(ge, slow); | 667 __ b(ge, slow); |
668 } else { | 668 } else { |
669 __ CompareObjectType(r0, r4, r4, HEAP_NUMBER_TYPE); | 669 __ CompareObjectType(r0, r4, r4, HEAP_NUMBER_TYPE); |
670 __ b(eq, &heap_number); | 670 __ b(eq, &heap_number); |
671 // Comparing JS objects with <=, >= is complicated. | 671 // Comparing JS objects with <=, >= is complicated. |
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7333 __ Jump(generic_construct_stub, RelocInfo::CODE_TARGET); | 7333 __ Jump(generic_construct_stub, RelocInfo::CODE_TARGET); |
7334 } | 7334 } |
7335 } | 7335 } |
7336 | 7336 |
7337 | 7337 |
7338 #undef __ | 7338 #undef __ |
7339 | 7339 |
7340 } } // namespace v8::internal | 7340 } } // namespace v8::internal |
7341 | 7341 |
7342 #endif // V8_TARGET_ARCH_ARM | 7342 #endif // V8_TARGET_ARCH_ARM |
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