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Issue 1790002: Cosmetic changes to the ARM port. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 10 years, 8 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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569 // can be patched to anything. 569 // can be patched to anything.
570 PatchInlinedLoad(address, Heap::null_value(), 0); 570 PatchInlinedLoad(address, Heap::null_value(), 0);
571 } 571 }
572 572
573 573
574 bool LoadIC::PatchInlinedLoad(Address address, Object* map, int offset) { 574 bool LoadIC::PatchInlinedLoad(Address address, Object* map, int offset) {
575 // If the instruction after the call site is not the pseudo instruction nop1 575 // If the instruction after the call site is not the pseudo instruction nop1
576 // then this is not related to an inlined in-object property load. The nop1 576 // then this is not related to an inlined in-object property load. The nop1
577 // instruction is located just after the call to the IC in the deferred code 577 // instruction is located just after the call to the IC in the deferred code
578 // handling the miss in the inlined code. After the nop1 instruction there is 578 // handling the miss in the inlined code. After the nop1 instruction there is
579 // a B instruction for jumping back from the deferred code. 579 // a branch instruction for jumping back from the deferred code.
580 Address address_after_call = address + Assembler::kCallTargetAddressOffset; 580 Address address_after_call = address + Assembler::kCallTargetAddressOffset;
581 Instr instr_after_call = Assembler::instr_at(address_after_call); 581 Instr instr_after_call = Assembler::instr_at(address_after_call);
582 if (!Assembler::IsNop(instr_after_call, NAMED_PROPERTY_LOAD_INLINED)) { 582 if (!Assembler::IsNop(instr_after_call, NAMED_PROPERTY_LOAD_INLINED)) {
583 return false; 583 return false;
584 } 584 }
585 ASSERT_EQ(0, RegisterAllocator::kNumRegisters); 585 ASSERT_EQ(0, RegisterAllocator::kNumRegisters);
586 Address address_after_nop1 = address_after_call + Assembler::kInstrSize; 586 Address address_after_nop1 = address_after_call + Assembler::kInstrSize;
587 Instr instr_after_nop1 = Assembler::instr_at(address_after_nop1); 587 Instr instr_after_nop1 = Assembler::instr_at(address_after_nop1);
588 ASSERT(Assembler::IsBranch(instr_after_nop1)); 588 ASSERT(Assembler::IsBranch(instr_after_nop1));
589 589
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702 702
703 // Get the elements array of the object. 703 // Get the elements array of the object.
704 __ ldr(r1, FieldMemOperand(r1, JSObject::kElementsOffset)); 704 __ ldr(r1, FieldMemOperand(r1, JSObject::kElementsOffset));
705 // Check that the object is in fast mode (not dictionary). 705 // Check that the object is in fast mode (not dictionary).
706 __ ldr(r3, FieldMemOperand(r1, HeapObject::kMapOffset)); 706 __ ldr(r3, FieldMemOperand(r1, HeapObject::kMapOffset));
707 __ LoadRoot(ip, Heap::kFixedArrayMapRootIndex); 707 __ LoadRoot(ip, Heap::kFixedArrayMapRootIndex);
708 __ cmp(r3, ip); 708 __ cmp(r3, ip);
709 __ b(ne, &check_pixel_array); 709 __ b(ne, &check_pixel_array);
710 // Check that the key (index) is within bounds. 710 // Check that the key (index) is within bounds.
711 __ ldr(r3, FieldMemOperand(r1, Array::kLengthOffset)); 711 __ ldr(r3, FieldMemOperand(r1, Array::kLengthOffset));
712 __ cmp(r0, Operand(r3)); 712 __ cmp(r0, r3);
713 __ b(hs, &slow); 713 __ b(hs, &slow);
714 // Fast case: Do the load. 714 // Fast case: Do the load.
715 __ add(r3, r1, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); 715 __ add(r3, r1, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
716 __ ldr(r0, MemOperand(r3, r0, LSL, kPointerSizeLog2)); 716 __ ldr(r0, MemOperand(r3, r0, LSL, kPointerSizeLog2));
717 __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); 717 __ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
718 __ cmp(r0, ip); 718 __ cmp(r0, ip);
719 // In case the loaded value is the_hole we have to consult GetProperty 719 // In case the loaded value is the_hole we have to consult GetProperty
720 // to ensure the prototype chain is searched. 720 // to ensure the prototype chain is searched.
721 __ b(eq, &slow); 721 __ b(eq, &slow);
722 __ Ret(); 722 __ Ret();
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1738 __ bind(&miss); 1738 __ bind(&miss);
1739 1739
1740 GenerateMiss(masm); 1740 GenerateMiss(masm);
1741 } 1741 }
1742 1742
1743 1743
1744 #undef __ 1744 #undef __
1745 1745
1746 1746
1747 } } // namespace v8::internal 1747 } } // namespace v8::internal
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