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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 // 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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401 // Distinguish sequential and external strings. Only these two string | 401 // Distinguish sequential and external strings. Only these two string |
402 // representations can reach here (slices and flat cons strings have been | 402 // representations can reach here (slices and flat cons strings have been |
403 // reduced to the underlying sequential or external string). | 403 // reduced to the underlying sequential or external string). |
404 Label external_string, check_encoding; | 404 Label external_string, check_encoding; |
405 __ bind(&check_sequential); | 405 __ bind(&check_sequential); |
406 STATIC_ASSERT(kSeqStringTag == 0); | 406 STATIC_ASSERT(kSeqStringTag == 0); |
407 __ And(at, result, Operand(kStringRepresentationMask)); | 407 __ And(at, result, Operand(kStringRepresentationMask)); |
408 __ Branch(&external_string, ne, at, Operand(zero_reg)); | 408 __ Branch(&external_string, ne, at, Operand(zero_reg)); |
409 | 409 |
410 // Prepare sequential strings | 410 // Prepare sequential strings |
411 STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqAsciiString::kHeaderSize); | 411 STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize); |
412 __ Addu(string, | 412 __ Addu(string, |
413 string, | 413 string, |
414 SeqTwoByteString::kHeaderSize - kHeapObjectTag); | 414 SeqTwoByteString::kHeaderSize - kHeapObjectTag); |
415 __ jmp(&check_encoding); | 415 __ jmp(&check_encoding); |
416 | 416 |
417 // Handle external strings. | 417 // Handle external strings. |
418 __ bind(&external_string); | 418 __ bind(&external_string); |
419 if (FLAG_debug_code) { | 419 if (FLAG_debug_code) { |
420 // Assert that we do not have a cons or slice (indirect strings) here. | 420 // Assert that we do not have a cons or slice (indirect strings) here. |
421 // Sequential strings have already been ruled out. | 421 // Sequential strings have already been ruled out. |
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538 patcher.masm()->dd(reinterpret_cast<uint32_t>(stub->instruction_start())); | 538 patcher.masm()->dd(reinterpret_cast<uint32_t>(stub->instruction_start())); |
539 } | 539 } |
540 } | 540 } |
541 | 541 |
542 | 542 |
543 #undef __ | 543 #undef __ |
544 | 544 |
545 } } // namespace v8::internal | 545 } } // namespace v8::internal |
546 | 546 |
547 #endif // V8_TARGET_ARCH_MIPS | 547 #endif // V8_TARGET_ARCH_MIPS |
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