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Issue 63863005: Add new HSeqStringGetChar instruction. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Fix invalid use of movw(). Created 7 years, 1 month ago
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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 // 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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1643 STATIC_ASSERT(kCharSize == 1); 1643 STATIC_ASSERT(kCharSize == 1);
1644 return FieldOperand(string, SeqString::kHeaderSize + offset); 1644 return FieldOperand(string, SeqString::kHeaderSize + offset);
1645 } 1645 }
1646 return FieldOperand( 1646 return FieldOperand(
1647 string, ToRegister(index), 1647 string, ToRegister(index),
1648 encoding == String::ONE_BYTE_ENCODING ? times_1 : times_2, 1648 encoding == String::ONE_BYTE_ENCODING ? times_1 : times_2,
1649 SeqString::kHeaderSize); 1649 SeqString::kHeaderSize);
1650 } 1650 }
1651 1651
1652 1652
1653 void LCodeGen::DoSeqStringGetChar(LSeqStringGetChar* instr) {
1654 String::Encoding encoding = instr->hydrogen()->encoding();
1655 Register result = ToRegister(instr->result());
1656 Register string = ToRegister(instr->string());
1657
1658 if (FLAG_debug_code) {
1659 __ push(string);
1660 __ movq(string, FieldOperand(string, HeapObject::kMapOffset));
1661 __ movzxbq(string, FieldOperand(string, Map::kInstanceTypeOffset));
1662
1663 __ andb(string, Immediate(kStringRepresentationMask | kStringEncodingMask));
1664 static const uint32_t one_byte_seq_type = kSeqStringTag | kOneByteStringTag;
1665 static const uint32_t two_byte_seq_type = kSeqStringTag | kTwoByteStringTag;
1666 __ cmpq(string, Immediate(encoding == String::ONE_BYTE_ENCODING
1667 ? one_byte_seq_type : two_byte_seq_type));
1668 __ Check(equal, kUnexpectedStringType);
1669 __ pop(string);
1670 }
1671
1672 Operand operand = BuildSeqStringOperand(string, instr->index(), encoding);
1673 if (encoding == String::ONE_BYTE_ENCODING) {
1674 __ movzxbl(result, operand);
1675 } else {
1676 __ movzxwl(result, operand);
1677 }
1678 }
1679
1680
1653 void LCodeGen::DoSeqStringSetChar(LSeqStringSetChar* instr) { 1681 void LCodeGen::DoSeqStringSetChar(LSeqStringSetChar* instr) {
1654 String::Encoding encoding = instr->hydrogen()->encoding(); 1682 String::Encoding encoding = instr->hydrogen()->encoding();
1655 Register string = ToRegister(instr->string()); 1683 Register string = ToRegister(instr->string());
1656 1684
1657 if (FLAG_debug_code) { 1685 if (FLAG_debug_code) {
1658 __ push(string); 1686 __ push(string);
1659 __ movq(string, FieldOperand(string, HeapObject::kMapOffset)); 1687 __ movq(string, FieldOperand(string, HeapObject::kMapOffset));
1660 __ movzxbq(string, FieldOperand(string, Map::kInstanceTypeOffset)); 1688 __ movzxbq(string, FieldOperand(string, Map::kInstanceTypeOffset));
1661 1689
1662 __ andb(string, Immediate(kStringRepresentationMask | kStringEncodingMask)); 1690 __ andb(string, Immediate(kStringRepresentationMask | kStringEncodingMask));
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5498 FixedArray::kHeaderSize - kPointerSize)); 5526 FixedArray::kHeaderSize - kPointerSize));
5499 __ bind(&done); 5527 __ bind(&done);
5500 } 5528 }
5501 5529
5502 5530
5503 #undef __ 5531 #undef __
5504 5532
5505 } } // namespace v8::internal 5533 } } // namespace v8::internal
5506 5534
5507 #endif // V8_TARGET_ARCH_X64 5535 #endif // V8_TARGET_ARCH_X64
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