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Issue 159498: Merge r2549 to branches/1.2. (Closed) Base URL: http://v8.googlecode.com/svn/branches/1.2/
Patch Set: '' Created 11 years, 4 months ago
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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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568 // objects work as intended. 568 // objects work as intended.
569 ASSERT(JS_OBJECT_TYPE > JS_VALUE_TYPE); 569 ASSERT(JS_OBJECT_TYPE > JS_VALUE_TYPE);
570 __ ldrb(r2, FieldMemOperand(r2, Map::kInstanceTypeOffset)); 570 __ ldrb(r2, FieldMemOperand(r2, Map::kInstanceTypeOffset));
571 __ cmp(r2, Operand(JS_OBJECT_TYPE)); 571 __ cmp(r2, Operand(JS_OBJECT_TYPE));
572 __ b(lt, &slow); 572 __ b(lt, &slow);
573 573
574 // Get the elements array of the object. 574 // Get the elements array of the object.
575 __ ldr(r1, FieldMemOperand(r1, JSObject::kElementsOffset)); 575 __ ldr(r1, FieldMemOperand(r1, JSObject::kElementsOffset));
576 // Check that the object is in fast mode (not dictionary). 576 // Check that the object is in fast mode (not dictionary).
577 __ ldr(r3, FieldMemOperand(r1, HeapObject::kMapOffset)); 577 __ ldr(r3, FieldMemOperand(r1, HeapObject::kMapOffset));
578 __ cmp(r3, Operand(Factory::hash_table_map())); 578 __ cmp(r3, Operand(Factory::fixed_array_map()));
579 __ b(eq, &slow); 579 __ b(ne, &slow);
580 // Check that the key (index) is within bounds. 580 // Check that the key (index) is within bounds.
581 __ ldr(r3, FieldMemOperand(r1, Array::kLengthOffset)); 581 __ ldr(r3, FieldMemOperand(r1, Array::kLengthOffset));
582 __ cmp(r0, Operand(r3)); 582 __ cmp(r0, Operand(r3));
583 __ b(lo, &fast); 583 __ b(lo, &fast);
584 584
585 // Slow case: Push extra copies of the arguments (2). 585 // Slow case: Push extra copies of the arguments (2).
586 __ bind(&slow); 586 __ bind(&slow);
587 __ IncrementCounter(&Counters::keyed_load_generic_slow, 1, r0, r1); 587 __ IncrementCounter(&Counters::keyed_load_generic_slow, 1, r0, r1);
588 __ ldm(ia, sp, r0.bit() | r1.bit()); 588 __ ldm(ia, sp, r0.bit() | r1.bit());
589 __ stm(db_w, sp, r0.bit() | r1.bit()); 589 __ stm(db_w, sp, r0.bit() | r1.bit());
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647 __ b(eq, &array); 647 __ b(eq, &array);
648 // Check that the object is some kind of JS object. 648 // Check that the object is some kind of JS object.
649 __ cmp(r2, Operand(FIRST_JS_OBJECT_TYPE)); 649 __ cmp(r2, Operand(FIRST_JS_OBJECT_TYPE));
650 __ b(lt, &slow); 650 __ b(lt, &slow);
651 651
652 652
653 // Object case: Check key against length in the elements array. 653 // Object case: Check key against length in the elements array.
654 __ ldr(r3, FieldMemOperand(r3, JSObject::kElementsOffset)); 654 __ ldr(r3, FieldMemOperand(r3, JSObject::kElementsOffset));
655 // Check that the object is in fast mode (not dictionary). 655 // Check that the object is in fast mode (not dictionary).
656 __ ldr(r2, FieldMemOperand(r3, HeapObject::kMapOffset)); 656 __ ldr(r2, FieldMemOperand(r3, HeapObject::kMapOffset));
657 __ cmp(r2, Operand(Factory::hash_table_map())); 657 __ cmp(r2, Operand(Factory::fixed_array_map()));
658 __ b(eq, &slow); 658 __ b(ne, &slow);
659 // Untag the key (for checking against untagged length in the fixed array). 659 // Untag the key (for checking against untagged length in the fixed array).
660 __ mov(r1, Operand(r1, ASR, kSmiTagSize)); 660 __ mov(r1, Operand(r1, ASR, kSmiTagSize));
661 // Compute address to store into and check array bounds. 661 // Compute address to store into and check array bounds.
662 __ add(r2, r3, Operand(Array::kHeaderSize - kHeapObjectTag)); 662 __ add(r2, r3, Operand(Array::kHeaderSize - kHeapObjectTag));
663 __ add(r2, r2, Operand(r1, LSL, kPointerSizeLog2)); 663 __ add(r2, r2, Operand(r1, LSL, kPointerSizeLog2));
664 __ ldr(ip, FieldMemOperand(r3, Array::kLengthOffset)); 664 __ ldr(ip, FieldMemOperand(r3, Array::kLengthOffset));
665 __ cmp(r1, Operand(ip)); 665 __ cmp(r1, Operand(ip));
666 __ b(lo, &fast); 666 __ b(lo, &fast);
667 667
668 668
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696 __ b(&fast); 696 __ b(&fast);
697 697
698 698
699 // Array case: Get the length and the elements array from the JS 699 // Array case: Get the length and the elements array from the JS
700 // array. Check that the array is in fast mode; if it is the 700 // array. Check that the array is in fast mode; if it is the
701 // length is always a smi. 701 // length is always a smi.
702 // r0 == value, r3 == object 702 // r0 == value, r3 == object
703 __ bind(&array); 703 __ bind(&array);
704 __ ldr(r2, FieldMemOperand(r3, JSObject::kElementsOffset)); 704 __ ldr(r2, FieldMemOperand(r3, JSObject::kElementsOffset));
705 __ ldr(r1, FieldMemOperand(r2, HeapObject::kMapOffset)); 705 __ ldr(r1, FieldMemOperand(r2, HeapObject::kMapOffset));
706 __ cmp(r1, Operand(Factory::hash_table_map())); 706 __ cmp(r1, Operand(Factory::fixed_array_map()));
707 __ b(eq, &slow); 707 __ b(ne, &slow);
708 708
709 // Check the key against the length in the array, compute the 709 // Check the key against the length in the array, compute the
710 // address to store into and fall through to fast case. 710 // address to store into and fall through to fast case.
711 __ ldr(r1, MemOperand(sp)); // restore key 711 __ ldr(r1, MemOperand(sp)); // restore key
712 // r0 == value, r1 == key, r2 == elements, r3 == object. 712 // r0 == value, r1 == key, r2 == elements, r3 == object.
713 __ ldr(ip, FieldMemOperand(r3, JSArray::kLengthOffset)); 713 __ ldr(ip, FieldMemOperand(r3, JSArray::kLengthOffset));
714 __ cmp(r1, Operand(ip)); 714 __ cmp(r1, Operand(ip));
715 __ b(hs, &extra); 715 __ b(hs, &extra);
716 __ mov(r3, Operand(r2)); 716 __ mov(r3, Operand(r2));
717 __ add(r2, r2, Operand(Array::kHeaderSize - kHeapObjectTag)); 717 __ add(r2, r2, Operand(Array::kHeaderSize - kHeapObjectTag));
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801 801
802 // Perform tail call to the entry. 802 // Perform tail call to the entry.
803 __ TailCallRuntime(f, 3); 803 __ TailCallRuntime(f, 3);
804 } 804 }
805 805
806 806
807 #undef __ 807 #undef __
808 808
809 809
810 } } // namespace v8::internal 810 } } // namespace v8::internal
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