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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 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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699 } | 699 } |
700 | 700 |
701 | 701 |
702 void KeyedLoadIC::GenerateString(MacroAssembler* masm) { | 702 void KeyedLoadIC::GenerateString(MacroAssembler* masm) { |
703 // ---------- S t a t e -------------- | 703 // ---------- S t a t e -------------- |
704 // -- lr : return address | 704 // -- lr : return address |
705 // -- sp[0] : key | 705 // -- sp[0] : key |
706 // -- sp[4] : receiver | 706 // -- sp[4] : receiver |
707 // ----------------------------------- | 707 // ----------------------------------- |
708 | 708 |
| 709 Label miss, index_ok; |
| 710 |
| 711 // Get the key and receiver object from the stack. |
| 712 __ ldm(ia, sp, r0.bit() | r1.bit()); |
| 713 |
| 714 // Check that the receiver isn't a smi. |
| 715 __ BranchOnSmi(r1, &miss); |
| 716 |
| 717 // Check that the receiver is a string. |
| 718 Condition is_string = masm->IsObjectStringType(r1, r2); |
| 719 __ b(NegateCondition(is_string), &miss); |
| 720 |
| 721 // Check if key is a smi or a heap number. |
| 722 __ BranchOnSmi(r0, &index_ok); |
| 723 __ CheckMap(r0, r2, Factory::heap_number_map(), &miss, false); |
| 724 |
| 725 __ bind(&index_ok); |
| 726 // Duplicate receiver and key since they are expected on the stack after |
| 727 // the KeyedLoadIC call. |
| 728 __ stm(db_w, sp, r0.bit() | r1.bit()); |
| 729 __ InvokeBuiltin(Builtins::STRING_CHAR_AT, JUMP_JS); |
| 730 |
| 731 __ bind(&miss); |
709 GenerateGeneric(masm); | 732 GenerateGeneric(masm); |
710 } | 733 } |
711 | 734 |
712 | 735 |
713 // Convert unsigned integer with specified number of leading zeroes in binary | 736 // Convert unsigned integer with specified number of leading zeroes in binary |
714 // representation to IEEE 754 double. | 737 // representation to IEEE 754 double. |
715 // Integer to convert is passed in register hiword. | 738 // Integer to convert is passed in register hiword. |
716 // Resulting double is returned in registers hiword:loword. | 739 // Resulting double is returned in registers hiword:loword. |
717 // This functions does not work correctly for 0. | 740 // This functions does not work correctly for 0. |
718 static void GenerateUInt2Double(MacroAssembler* masm, | 741 static void GenerateUInt2Double(MacroAssembler* masm, |
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1662 __ bind(&miss); | 1685 __ bind(&miss); |
1663 | 1686 |
1664 GenerateMiss(masm); | 1687 GenerateMiss(masm); |
1665 } | 1688 } |
1666 | 1689 |
1667 | 1690 |
1668 #undef __ | 1691 #undef __ |
1669 | 1692 |
1670 | 1693 |
1671 } } // namespace v8::internal | 1694 } } // namespace v8::internal |
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