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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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3958 | 3958 |
3959 | 3959 |
3960 void MacroAssembler::AllocateAsciiString(Register result, | 3960 void MacroAssembler::AllocateAsciiString(Register result, |
3961 Register length, | 3961 Register length, |
3962 Register scratch1, | 3962 Register scratch1, |
3963 Register scratch2, | 3963 Register scratch2, |
3964 Register scratch3, | 3964 Register scratch3, |
3965 Label* gc_required) { | 3965 Label* gc_required) { |
3966 // Calculate the number of bytes needed for the characters in the string while | 3966 // Calculate the number of bytes needed for the characters in the string while |
3967 // observing object alignment. | 3967 // observing object alignment. |
3968 const int kHeaderAlignment = SeqAsciiString::kHeaderSize & | 3968 const int kHeaderAlignment = SeqOneByteString::kHeaderSize & |
3969 kObjectAlignmentMask; | 3969 kObjectAlignmentMask; |
3970 movl(scratch1, length); | 3970 movl(scratch1, length); |
3971 ASSERT(kCharSize == 1); | 3971 ASSERT(kCharSize == 1); |
3972 addq(scratch1, Immediate(kObjectAlignmentMask + kHeaderAlignment)); | 3972 addq(scratch1, Immediate(kObjectAlignmentMask + kHeaderAlignment)); |
3973 and_(scratch1, Immediate(~kObjectAlignmentMask)); | 3973 and_(scratch1, Immediate(~kObjectAlignmentMask)); |
3974 if (kHeaderAlignment > 0) { | 3974 if (kHeaderAlignment > 0) { |
3975 subq(scratch1, Immediate(kHeaderAlignment)); | 3975 subq(scratch1, Immediate(kHeaderAlignment)); |
3976 } | 3976 } |
3977 | 3977 |
3978 // Allocate ASCII string in new space. | 3978 // Allocate ASCII string in new space. |
3979 AllocateInNewSpace(SeqAsciiString::kHeaderSize, | 3979 AllocateInNewSpace(SeqOneByteString::kHeaderSize, |
3980 times_1, | 3980 times_1, |
3981 scratch1, | 3981 scratch1, |
3982 result, | 3982 result, |
3983 scratch2, | 3983 scratch2, |
3984 scratch3, | 3984 scratch3, |
3985 gc_required, | 3985 gc_required, |
3986 TAG_OBJECT); | 3986 TAG_OBJECT); |
3987 | 3987 |
3988 // Set the map, length and hash field. | 3988 // Set the map, length and hash field. |
3989 LoadRoot(kScratchRegister, Heap::kAsciiStringMapRootIndex); | 3989 LoadRoot(kScratchRegister, Heap::kAsciiStringMapRootIndex); |
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4568 | 4568 |
4569 movq(rcx, FieldOperand(rbx, Map::kPrototypeOffset)); | 4569 movq(rcx, FieldOperand(rbx, Map::kPrototypeOffset)); |
4570 cmpq(rcx, null_value); | 4570 cmpq(rcx, null_value); |
4571 j(not_equal, &next); | 4571 j(not_equal, &next); |
4572 } | 4572 } |
4573 | 4573 |
4574 | 4574 |
4575 } } // namespace v8::internal | 4575 } } // namespace v8::internal |
4576 | 4576 |
4577 #endif // V8_TARGET_ARCH_X64 | 4577 #endif // V8_TARGET_ARCH_X64 |
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