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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "v8.h" | 5 #include "v8.h" |
6 | 6 |
7 #if V8_TARGET_ARCH_X64 | 7 #if V8_TARGET_ARCH_X64 |
8 | 8 |
9 #include "codegen.h" | 9 #include "codegen.h" |
10 #include "macro-assembler.h" | 10 #include "macro-assembler.h" |
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511 | 511 |
512 // Handle external strings. | 512 // Handle external strings. |
513 Label ascii_external, done; | 513 Label ascii_external, done; |
514 if (FLAG_debug_code) { | 514 if (FLAG_debug_code) { |
515 // Assert that we do not have a cons or slice (indirect strings) here. | 515 // Assert that we do not have a cons or slice (indirect strings) here. |
516 // Sequential strings have already been ruled out. | 516 // Sequential strings have already been ruled out. |
517 __ testb(result, Immediate(kIsIndirectStringMask)); | 517 __ testb(result, Immediate(kIsIndirectStringMask)); |
518 __ Assert(zero, kExternalStringExpectedButNotFound); | 518 __ Assert(zero, kExternalStringExpectedButNotFound); |
519 } | 519 } |
520 // Rule out short external strings. | 520 // Rule out short external strings. |
521 STATIC_CHECK(kShortExternalStringTag != 0); | 521 STATIC_ASSERT(kShortExternalStringTag != 0); |
522 __ testb(result, Immediate(kShortExternalStringTag)); | 522 __ testb(result, Immediate(kShortExternalStringTag)); |
523 __ j(not_zero, call_runtime); | 523 __ j(not_zero, call_runtime); |
524 // Check encoding. | 524 // Check encoding. |
525 STATIC_ASSERT(kTwoByteStringTag == 0); | 525 STATIC_ASSERT(kTwoByteStringTag == 0); |
526 __ testb(result, Immediate(kStringEncodingMask)); | 526 __ testb(result, Immediate(kStringEncodingMask)); |
527 __ movp(result, FieldOperand(string, ExternalString::kResourceDataOffset)); | 527 __ movp(result, FieldOperand(string, ExternalString::kResourceDataOffset)); |
528 __ j(not_equal, &ascii_external, Label::kNear); | 528 __ j(not_equal, &ascii_external, Label::kNear); |
529 // Two-byte string. | 529 // Two-byte string. |
530 __ movzxwl(result, Operand(result, index, times_2, 0)); | 530 __ movzxwl(result, Operand(result, index, times_2, 0)); |
531 __ jmp(&done, Label::kNear); | 531 __ jmp(&done, Label::kNear); |
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693 // argument_count_reg_ * times_pointer_size + (receiver - 1) * kPointerSize. | 693 // argument_count_reg_ * times_pointer_size + (receiver - 1) * kPointerSize. |
694 return Operand(base_reg_, argument_count_reg_, times_pointer_size, | 694 return Operand(base_reg_, argument_count_reg_, times_pointer_size, |
695 displacement_to_last_argument + (receiver - 1 - index) * kPointerSize); | 695 displacement_to_last_argument + (receiver - 1 - index) * kPointerSize); |
696 } | 696 } |
697 } | 697 } |
698 | 698 |
699 | 699 |
700 } } // namespace v8::internal | 700 } } // namespace v8::internal |
701 | 701 |
702 #endif // V8_TARGET_ARCH_X64 | 702 #endif // V8_TARGET_ARCH_X64 |
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