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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 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 "bootstrapper.h" | 9 #include "bootstrapper.h" |
10 #include "code-stubs.h" | 10 #include "code-stubs.h" |
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1442 __ movp(rbx, FieldOperand(rdi, HeapObject::kMapOffset)); | 1442 __ movp(rbx, FieldOperand(rdi, HeapObject::kMapOffset)); |
1443 __ movp(rbx, FieldOperand(rbx, Map::kInstanceTypeOffset)); | 1443 __ movp(rbx, FieldOperand(rbx, Map::kInstanceTypeOffset)); |
1444 | 1444 |
1445 // (5a) Is subject sequential two byte? If yes, go to (9). | 1445 // (5a) Is subject sequential two byte? If yes, go to (9). |
1446 __ testb(rbx, Immediate(kStringRepresentationMask | kStringEncodingMask)); | 1446 __ testb(rbx, Immediate(kStringRepresentationMask | kStringEncodingMask)); |
1447 STATIC_ASSERT((kSeqStringTag | kTwoByteStringTag) == 0); | 1447 STATIC_ASSERT((kSeqStringTag | kTwoByteStringTag) == 0); |
1448 __ j(zero, &seq_two_byte_string); // Go to (9). | 1448 __ j(zero, &seq_two_byte_string); // Go to (9). |
1449 // (5b) Is subject external? If yes, go to (8). | 1449 // (5b) Is subject external? If yes, go to (8). |
1450 __ testb(rbx, Immediate(kStringRepresentationMask)); | 1450 __ testb(rbx, Immediate(kStringRepresentationMask)); |
1451 // The underlying external string is never a short external string. | 1451 // The underlying external string is never a short external string. |
1452 STATIC_CHECK(ExternalString::kMaxShortLength < ConsString::kMinLength); | 1452 STATIC_ASSERT(ExternalString::kMaxShortLength < ConsString::kMinLength); |
1453 STATIC_CHECK(ExternalString::kMaxShortLength < SlicedString::kMinLength); | 1453 STATIC_ASSERT(ExternalString::kMaxShortLength < SlicedString::kMinLength); |
1454 __ j(not_zero, &external_string); // Go to (8) | 1454 __ j(not_zero, &external_string); // Go to (8) |
1455 | 1455 |
1456 // (6) One byte sequential. Load regexp code for one byte. | 1456 // (6) One byte sequential. Load regexp code for one byte. |
1457 __ bind(&seq_one_byte_string); | 1457 __ bind(&seq_one_byte_string); |
1458 // rax: RegExp data (FixedArray) | 1458 // rax: RegExp data (FixedArray) |
1459 __ movp(r11, FieldOperand(rax, JSRegExp::kDataAsciiCodeOffset)); | 1459 __ movp(r11, FieldOperand(rax, JSRegExp::kDataAsciiCodeOffset)); |
1460 __ Set(rcx, 1); // Type is one byte. | 1460 __ Set(rcx, 1); // Type is one byte. |
1461 | 1461 |
1462 // (E) Carry on. String handling is done. | 1462 // (E) Carry on. String handling is done. |
1463 __ bind(&check_code); | 1463 __ bind(&check_code); |
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3416 // The subject string can only be external or sequential string of either | 3416 // The subject string can only be external or sequential string of either |
3417 // encoding at this point. | 3417 // encoding at this point. |
3418 Label two_byte_sequential, sequential_string; | 3418 Label two_byte_sequential, sequential_string; |
3419 STATIC_ASSERT(kExternalStringTag != 0); | 3419 STATIC_ASSERT(kExternalStringTag != 0); |
3420 STATIC_ASSERT(kSeqStringTag == 0); | 3420 STATIC_ASSERT(kSeqStringTag == 0); |
3421 __ testb(rbx, Immediate(kExternalStringTag)); | 3421 __ testb(rbx, Immediate(kExternalStringTag)); |
3422 __ j(zero, &sequential_string); | 3422 __ j(zero, &sequential_string); |
3423 | 3423 |
3424 // Handle external string. | 3424 // Handle external string. |
3425 // Rule out short external strings. | 3425 // Rule out short external strings. |
3426 STATIC_CHECK(kShortExternalStringTag != 0); | 3426 STATIC_ASSERT(kShortExternalStringTag != 0); |
3427 __ testb(rbx, Immediate(kShortExternalStringMask)); | 3427 __ testb(rbx, Immediate(kShortExternalStringMask)); |
3428 __ j(not_zero, &runtime); | 3428 __ j(not_zero, &runtime); |
3429 __ movp(rdi, FieldOperand(rdi, ExternalString::kResourceDataOffset)); | 3429 __ movp(rdi, FieldOperand(rdi, ExternalString::kResourceDataOffset)); |
3430 // Move the pointer so that offset-wise, it looks like a sequential string. | 3430 // Move the pointer so that offset-wise, it looks like a sequential string. |
3431 STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize); | 3431 STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize); |
3432 __ subp(rdi, Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); | 3432 __ subp(rdi, Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
3433 | 3433 |
3434 __ bind(&sequential_string); | 3434 __ bind(&sequential_string); |
3435 STATIC_ASSERT((kOneByteStringTag & kStringEncodingMask) != 0); | 3435 STATIC_ASSERT((kOneByteStringTag & kStringEncodingMask) != 0); |
3436 __ testb(rbx, Immediate(kStringEncodingMask)); | 3436 __ testb(rbx, Immediate(kStringEncodingMask)); |
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5094 return_value_operand, | 5094 return_value_operand, |
5095 NULL); | 5095 NULL); |
5096 } | 5096 } |
5097 | 5097 |
5098 | 5098 |
5099 #undef __ | 5099 #undef __ |
5100 | 5100 |
5101 } } // namespace v8::internal | 5101 } } // namespace v8::internal |
5102 | 5102 |
5103 #endif // V8_TARGET_ARCH_X64 | 5103 #endif // V8_TARGET_ARCH_X64 |
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