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Issue 6966041: Add complete ElementKind information directly to Map for objects with elements. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: review feedback Created 9 years, 6 months ago
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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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501 501
502 // Check that the key is a smi. 502 // Check that the key is a smi.
503 __ JumpIfNotSmi(rax, &check_string); 503 __ JumpIfNotSmi(rax, &check_string);
504 __ bind(&index_smi); 504 __ bind(&index_smi);
505 // Now the key is known to be a smi. This place is also jumped to from below 505 // Now the key is known to be a smi. This place is also jumped to from below
506 // where a numeric string is converted to a smi. 506 // where a numeric string is converted to a smi.
507 507
508 GenerateKeyedLoadReceiverCheck( 508 GenerateKeyedLoadReceiverCheck(
509 masm, rdx, rcx, Map::kHasIndexedInterceptor, &slow); 509 masm, rdx, rcx, Map::kHasIndexedInterceptor, &slow);
510 510
511 // Check the "has fast elements" bit in the receiver's map which is 511 // Check the receiver's map to see if it has fast elements.
512 // now in rcx. 512 __ CheckFastElements(rcx, &check_number_dictionary);
513 __ testb(FieldOperand(rcx, Map::kBitField2Offset),
514 Immediate(1 << Map::kHasFastElements));
515 __ j(zero, &check_number_dictionary);
516 513
517 GenerateFastArrayLoad(masm, 514 GenerateFastArrayLoad(masm,
518 rdx, 515 rdx,
519 rax, 516 rax,
520 rcx, 517 rcx,
521 rbx, 518 rbx,
522 rax, 519 rax,
523 NULL, 520 NULL,
524 &slow); 521 &slow);
525 Counters* counters = masm->isolate()->counters(); 522 Counters* counters = masm->isolate()->counters();
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1604 Condition cc = *jmp_address == Assembler::kJncShortOpcode 1601 Condition cc = *jmp_address == Assembler::kJncShortOpcode
1605 ? not_zero 1602 ? not_zero
1606 : zero; 1603 : zero;
1607 *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc); 1604 *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc);
1608 } 1605 }
1609 1606
1610 1607
1611 } } // namespace v8::internal 1608 } } // namespace v8::internal
1612 1609
1613 #endif // V8_TARGET_ARCH_X64 1610 #endif // V8_TARGET_ARCH_X64
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