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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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3407 __ jmp(&try_again_with_new_string); | 3407 __ jmp(&try_again_with_new_string); |
3408 | 3408 |
3409 __ bind(&slow); | 3409 __ bind(&slow); |
3410 __ LoadRoot(r0, Heap::kUndefinedValueRootIndex); | 3410 __ LoadRoot(r0, Heap::kUndefinedValueRootIndex); |
3411 | 3411 |
3412 __ bind(&end); | 3412 __ bind(&end); |
3413 frame_->EmitPush(r0); | 3413 frame_->EmitPush(r0); |
3414 } | 3414 } |
3415 | 3415 |
3416 | 3416 |
3417 void CodeGenerator::GenerateCharFromCode(ZoneList<Expression*>* args) { | |
3418 Comment(masm_, "[ GenerateCharFromCode"); | |
3419 ASSERT(args->length() == 1); | |
3420 | |
3421 LoadAndSpill(args->at(0)); | |
3422 frame_->EmitPop(r0); | |
3423 | |
3424 JumpTarget slow_case; | |
3425 JumpTarget exit; | |
3426 | |
3427 // Fast case of Heap::LookupSingleCharacterStringFromCode. | |
3428 ASSERT(kSmiTag == 0); | |
3429 ASSERT(kSmiShiftSize == 0); | |
3430 ASSERT(IsPowerOf2(String::kMaxAsciiCharCode + 1)); | |
3431 __ tst(r0, Operand(kSmiTagMask | | |
3432 ((~String::kMaxAsciiCharCode) << kSmiTagSize))); | |
3433 slow_case.Branch(nz); | |
3434 | |
3435 ASSERT(kSmiTag == 0); | |
3436 ASSERT(kSmiTagSize == 1); | |
3437 ASSERT(kSmiShiftSize == 0); | |
3438 __ mov(r1, Operand(Factory::single_character_string_cache())); | |
3439 __ add(r1, r1, Operand(r0)); | |
Mads Ager (chromium)
2010/02/26 17:59:06
I would prefer to use
__ add(r1, r1, Operand(r0,
Vitaly Repeshko
2010/02/26 20:14:48
Done.
| |
3440 __ add(r1, r1, Operand(r0)); | |
3441 __ ldr(r1, MemOperand(r1, FixedArray::kHeaderSize - kHeapObjectTag)); | |
3442 __ cmp(r1, Operand(Factory::undefined_value())); | |
Mads Ager (chromium)
2010/02/26 17:59:06
You should use LoadRoot to ip followed by cmp here
Vitaly Repeshko
2010/02/26 20:14:48
Done.
| |
3443 slow_case.Branch(eq); | |
3444 | |
3445 frame_->EmitPush(r1); | |
3446 exit.Jump(); | |
3447 | |
3448 slow_case.Bind(); | |
3449 frame_->EmitPush(r0); | |
3450 frame_->CallRuntime(Runtime::kCharFromCode, 1); | |
3451 frame_->EmitPush(r0); | |
3452 | |
3453 exit.Bind(); | |
3454 } | |
3455 | |
3456 | |
3417 void CodeGenerator::GenerateIsArray(ZoneList<Expression*>* args) { | 3457 void CodeGenerator::GenerateIsArray(ZoneList<Expression*>* args) { |
3418 VirtualFrame::SpilledScope spilled_scope; | 3458 VirtualFrame::SpilledScope spilled_scope; |
3419 ASSERT(args->length() == 1); | 3459 ASSERT(args->length() == 1); |
3420 LoadAndSpill(args->at(0)); | 3460 LoadAndSpill(args->at(0)); |
3421 JumpTarget answer; | 3461 JumpTarget answer; |
3422 // We need the CC bits to come out as not_equal in the case where the | 3462 // We need the CC bits to come out as not_equal in the case where the |
3423 // object is a smi. This can't be done with the usual test opcode so | 3463 // object is a smi. This can't be done with the usual test opcode so |
3424 // we use XOR to get the right CC bits. | 3464 // we use XOR to get the right CC bits. |
3425 frame_->EmitPop(r0); | 3465 frame_->EmitPop(r0); |
3426 __ and_(r1, r0, Operand(kSmiTagMask)); | 3466 __ and_(r1, r0, Operand(kSmiTagMask)); |
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7663 | 7703 |
7664 // Just jump to runtime to add the two strings. | 7704 // Just jump to runtime to add the two strings. |
7665 __ bind(&string_add_runtime); | 7705 __ bind(&string_add_runtime); |
7666 __ TailCallRuntime(Runtime::kStringAdd, 2, 1); | 7706 __ TailCallRuntime(Runtime::kStringAdd, 2, 1); |
7667 } | 7707 } |
7668 | 7708 |
7669 | 7709 |
7670 #undef __ | 7710 #undef __ |
7671 | 7711 |
7672 } } // namespace v8::internal | 7712 } } // namespace v8::internal |
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