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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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10928 // Index is not a smi. | 10928 // Index is not a smi. |
10929 __ bind(&index_not_smi_); | 10929 __ bind(&index_not_smi_); |
10930 // If index is a heap number, try converting it to an integer. | 10930 // If index is a heap number, try converting it to an integer. |
10931 __ CheckMap(index_, Factory::heap_number_map(), index_not_number_, true); | 10931 __ CheckMap(index_, Factory::heap_number_map(), index_not_number_, true); |
10932 call_helper.BeforeCall(masm); | 10932 call_helper.BeforeCall(masm); |
10933 __ push(object_); | 10933 __ push(object_); |
10934 __ push(index_); | 10934 __ push(index_); |
10935 __ push(result_); | 10935 __ push(result_); |
10936 __ push(index_); // Consumed by runtime conversion function. | 10936 __ push(index_); // Consumed by runtime conversion function. |
10937 if (index_flags_ == STRING_INDEX_IS_NUMBER) { | 10937 if (index_flags_ == STRING_INDEX_IS_NUMBER) { |
10938 // Strictly speaking, NumberToInteger should be called here, but | 10938 __ CallRuntime(Runtime::kNumberToIntegerMapMinusZero, 1); |
10939 // our string lengths don't exceed 32 bits and using ToUint32 maps | |
10940 // -0 to 0, which is what is required by the spec when accessing | |
10941 // strings. | |
10942 __ CallRuntime(Runtime::kNumberToJSUint32, 1); | |
10943 } else { | 10939 } else { |
10944 ASSERT(index_flags_ == STRING_INDEX_IS_ARRAY_INDEX); | 10940 ASSERT(index_flags_ == STRING_INDEX_IS_ARRAY_INDEX); |
10945 // NumberToSmi discards numbers that are not exact integers. | 10941 // NumberToSmi discards numbers that are not exact integers. |
10946 __ CallRuntime(Runtime::kNumberToSmi, 1); | 10942 __ CallRuntime(Runtime::kNumberToSmi, 1); |
10947 } | 10943 } |
10948 if (!scratch_.is(rax)) { | 10944 if (!scratch_.is(rax)) { |
10949 // Save the conversion result before the pop instructions below | 10945 // Save the conversion result before the pop instructions below |
10950 // have a chance to overwrite it. | 10946 // have a chance to overwrite it. |
10951 __ movq(scratch_, rax); | 10947 __ movq(scratch_, rax); |
10952 } | 10948 } |
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11878 } | 11874 } |
11879 | 11875 |
11880 #endif | 11876 #endif |
11881 | 11877 |
11882 | 11878 |
11883 #undef __ | 11879 #undef __ |
11884 | 11880 |
11885 } } // namespace v8::internal | 11881 } } // namespace v8::internal |
11886 | 11882 |
11887 #endif // V8_TARGET_ARCH_X64 | 11883 #endif // V8_TARGET_ARCH_X64 |
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