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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_X87 | 7 #if V8_TARGET_ARCH_X87 |
| 8 | 8 |
| 9 #include "codegen.h" | 9 #include "codegen.h" |
| 10 #include "heap.h" | 10 #include "heap.h" |
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| 519 | 519 |
| 520 // Handle external strings. | 520 // Handle external strings. |
| 521 Label ascii_external, done; | 521 Label ascii_external, done; |
| 522 if (FLAG_debug_code) { | 522 if (FLAG_debug_code) { |
| 523 // Assert that we do not have a cons or slice (indirect strings) here. | 523 // Assert that we do not have a cons or slice (indirect strings) here. |
| 524 // Sequential strings have already been ruled out. | 524 // Sequential strings have already been ruled out. |
| 525 __ test(result, Immediate(kIsIndirectStringMask)); | 525 __ test(result, Immediate(kIsIndirectStringMask)); |
| 526 __ Assert(zero, kExternalStringExpectedButNotFound); | 526 __ Assert(zero, kExternalStringExpectedButNotFound); |
| 527 } | 527 } |
| 528 // Rule out short external strings. | 528 // Rule out short external strings. |
| 529 STATIC_CHECK(kShortExternalStringTag != 0); | 529 STATIC_ASSERT(kShortExternalStringTag != 0); |
| 530 __ test_b(result, kShortExternalStringMask); | 530 __ test_b(result, kShortExternalStringMask); |
| 531 __ j(not_zero, call_runtime); | 531 __ j(not_zero, call_runtime); |
| 532 // Check encoding. | 532 // Check encoding. |
| 533 STATIC_ASSERT(kTwoByteStringTag == 0); | 533 STATIC_ASSERT(kTwoByteStringTag == 0); |
| 534 __ test_b(result, kStringEncodingMask); | 534 __ test_b(result, kStringEncodingMask); |
| 535 __ mov(result, FieldOperand(string, ExternalString::kResourceDataOffset)); | 535 __ mov(result, FieldOperand(string, ExternalString::kResourceDataOffset)); |
| 536 __ j(not_equal, &ascii_external, Label::kNear); | 536 __ j(not_equal, &ascii_external, Label::kNear); |
| 537 // Two-byte string. | 537 // Two-byte string. |
| 538 __ movzx_w(result, Operand(result, index, times_2, 0)); | 538 __ movzx_w(result, Operand(result, index, times_2, 0)); |
| 539 __ jmp(&done, Label::kNear); | 539 __ jmp(&done, Label::kNear); |
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| 623 Code* stub = GetCodeAgeStub(isolate, age, parity); | 623 Code* stub = GetCodeAgeStub(isolate, age, parity); |
| 624 CodePatcher patcher(sequence, young_length); | 624 CodePatcher patcher(sequence, young_length); |
| 625 patcher.masm()->call(stub->instruction_start(), RelocInfo::NONE32); | 625 patcher.masm()->call(stub->instruction_start(), RelocInfo::NONE32); |
| 626 } | 626 } |
| 627 } | 627 } |
| 628 | 628 |
| 629 | 629 |
| 630 } } // namespace v8::internal | 630 } } // namespace v8::internal |
| 631 | 631 |
| 632 #endif // V8_TARGET_ARCH_X87 | 632 #endif // V8_TARGET_ARCH_X87 |
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