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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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497 // Two-byte string. | 497 // Two-byte string. |
498 __ ldrh(result, MemOperand(string, index, LSL, 1)); | 498 __ ldrh(result, MemOperand(string, index, LSL, 1)); |
499 __ jmp(&done); | 499 __ jmp(&done); |
500 __ bind(&ascii); | 500 __ bind(&ascii); |
501 // Ascii string. | 501 // Ascii string. |
502 __ ldrb(result, MemOperand(string, index)); | 502 __ ldrb(result, MemOperand(string, index)); |
503 __ bind(&done); | 503 __ bind(&done); |
504 } | 504 } |
505 | 505 |
506 | 506 |
507 void SeqStringSetCharGenerator::Generate(MacroAssembler* masm, | |
508 String::Encoding encoding, | |
509 Register string, | |
510 Register index, | |
511 Register value) { | |
512 if (FLAG_debug_code) { | |
513 __ SmiTst(index); | |
514 __ Check(eq, "Non-smi index"); | |
515 __ SmiTst(value); | |
516 __ Check(eq, "Non-smi value"); | |
517 | |
518 __ ldr(ip, FieldMemOperand(string, String::kLengthOffset)); | |
519 __ cmp(index, ip); | |
520 __ Check(lt, "Index is too large"); | |
521 | |
522 __ cmp(index, Operand(Smi::FromInt(0))); | |
523 __ Check(ge, "Index is negative"); | |
524 | |
525 __ ldr(ip, FieldMemOperand(string, HeapObject::kMapOffset)); | |
526 __ ldrb(ip, FieldMemOperand(ip, Map::kInstanceTypeOffset)); | |
527 | |
528 __ and_(ip, ip, Operand(kStringRepresentationMask | kStringEncodingMask)); | |
529 static const uint32_t one_byte_seq_type = kSeqStringTag | kOneByteStringTag; | |
530 static const uint32_t two_byte_seq_type = kSeqStringTag | kTwoByteStringTag; | |
531 __ cmp(ip, Operand(encoding == String::ONE_BYTE_ENCODING | |
532 ? one_byte_seq_type : two_byte_seq_type)); | |
533 __ Check(eq, "Unexpected string type"); | |
534 } | |
535 | |
536 __ add(ip, | |
537 string, | |
538 Operand(SeqString::kHeaderSize - kHeapObjectTag)); | |
539 __ SmiUntag(value, value); | |
540 STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0); | |
541 if (encoding == String::ONE_BYTE_ENCODING) { | |
542 // Smis are tagged by left shift by 1, thus LSR by 1 to smi-untag inline. | |
543 __ strb(value, MemOperand(ip, index, LSR, kSmiTagSize)); | |
544 } else { | |
545 // No need to untag a smi for two-byte addressing. | |
546 __ strh(value, MemOperand(ip, index)); // LSL(1 - kSmiTagSize). | |
547 } | |
548 } | |
549 | |
550 | |
551 static MemOperand ExpConstant(int index, Register base) { | 507 static MemOperand ExpConstant(int index, Register base) { |
552 return MemOperand(base, index * kDoubleSize); | 508 return MemOperand(base, index * kDoubleSize); |
553 } | 509 } |
554 | 510 |
555 | 511 |
556 void MathExpGenerator::EmitMathExp(MacroAssembler* masm, | 512 void MathExpGenerator::EmitMathExp(MacroAssembler* masm, |
557 DwVfpRegister input, | 513 DwVfpRegister input, |
558 DwVfpRegister result, | 514 DwVfpRegister result, |
559 DwVfpRegister double_scratch1, | 515 DwVfpRegister double_scratch1, |
560 DwVfpRegister double_scratch2, | 516 DwVfpRegister double_scratch2, |
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681 patcher.masm()->add(r0, pc, Operand(-8)); | 637 patcher.masm()->add(r0, pc, Operand(-8)); |
682 patcher.masm()->ldr(pc, MemOperand(pc, -4)); | 638 patcher.masm()->ldr(pc, MemOperand(pc, -4)); |
683 patcher.masm()->dd(reinterpret_cast<uint32_t>(stub->instruction_start())); | 639 patcher.masm()->dd(reinterpret_cast<uint32_t>(stub->instruction_start())); |
684 } | 640 } |
685 } | 641 } |
686 | 642 |
687 | 643 |
688 } } // namespace v8::internal | 644 } } // namespace v8::internal |
689 | 645 |
690 #endif // V8_TARGET_ARCH_ARM | 646 #endif // V8_TARGET_ARCH_ARM |
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