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Issue 11293168: Rename kAsciiStringTag to kOneByteStringTag (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 8 years, 1 month ago
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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
(...skipping 4905 matching lines...) Expand 10 before | Expand all | Expand 10 after
4916 __ ldr(r0, FieldMemOperand(subject, HeapObject::kMapOffset)); 4916 __ ldr(r0, FieldMemOperand(subject, HeapObject::kMapOffset));
4917 __ ldrb(r0, FieldMemOperand(r0, Map::kInstanceTypeOffset)); 4917 __ ldrb(r0, FieldMemOperand(r0, Map::kInstanceTypeOffset));
4918 STATIC_ASSERT(kSeqStringTag == 0); 4918 STATIC_ASSERT(kSeqStringTag == 0);
4919 __ tst(r0, Operand(kStringRepresentationMask)); 4919 __ tst(r0, Operand(kStringRepresentationMask));
4920 __ b(ne, &external_string); 4920 __ b(ne, &external_string);
4921 4921
4922 __ bind(&seq_string); 4922 __ bind(&seq_string);
4923 // subject: Subject string 4923 // subject: Subject string
4924 // regexp_data: RegExp data (FixedArray) 4924 // regexp_data: RegExp data (FixedArray)
4925 // r0: Instance type of subject string 4925 // r0: Instance type of subject string
4926 STATIC_ASSERT(4 == kAsciiStringTag); 4926 STATIC_ASSERT(4 == kOneByteStringTag);
4927 STATIC_ASSERT(kTwoByteStringTag == 0); 4927 STATIC_ASSERT(kTwoByteStringTag == 0);
4928 // Find the code object based on the assumptions above. 4928 // Find the code object based on the assumptions above.
4929 __ and_(r0, r0, Operand(kStringEncodingMask)); 4929 __ and_(r0, r0, Operand(kStringEncodingMask));
4930 __ mov(r3, Operand(r0, ASR, 2), SetCC); 4930 __ mov(r3, Operand(r0, ASR, 2), SetCC);
4931 __ ldr(r7, FieldMemOperand(regexp_data, JSRegExp::kDataAsciiCodeOffset), ne); 4931 __ ldr(r7, FieldMemOperand(regexp_data, JSRegExp::kDataAsciiCodeOffset), ne);
4932 __ ldr(r7, FieldMemOperand(regexp_data, JSRegExp::kDataUC16CodeOffset), eq); 4932 __ ldr(r7, FieldMemOperand(regexp_data, JSRegExp::kDataUC16CodeOffset), eq);
4933 4933
4934 // Check that the irregexp code has been generated for the actual string 4934 // Check that the irregexp code has been generated for the actual string
4935 // encoding. If it has, the field contains a code object otherwise it contains 4935 // encoding. If it has, the field contains a code object otherwise it contains
4936 // a smi (code flushing support). 4936 // a smi (code flushing support).
(...skipping 1147 matching lines...) Expand 10 before | Expand all | Expand 10 after
6084 // r3: adjusted start index (untagged) 6084 // r3: adjusted start index (untagged)
6085 __ cmp(r2, Operand(SlicedString::kMinLength)); 6085 __ cmp(r2, Operand(SlicedString::kMinLength));
6086 // Short slice. Copy instead of slicing. 6086 // Short slice. Copy instead of slicing.
6087 __ b(lt, &copy_routine); 6087 __ b(lt, &copy_routine);
6088 // Allocate new sliced string. At this point we do not reload the instance 6088 // Allocate new sliced string. At this point we do not reload the instance
6089 // type including the string encoding because we simply rely on the info 6089 // type including the string encoding because we simply rely on the info
6090 // provided by the original string. It does not matter if the original 6090 // provided by the original string. It does not matter if the original
6091 // string's encoding is wrong because we always have to recheck encoding of 6091 // string's encoding is wrong because we always have to recheck encoding of
6092 // the newly created string's parent anyways due to externalized strings. 6092 // the newly created string's parent anyways due to externalized strings.
6093 Label two_byte_slice, set_slice_header; 6093 Label two_byte_slice, set_slice_header;
6094 STATIC_ASSERT((kStringEncodingMask & kAsciiStringTag) != 0); 6094 STATIC_ASSERT((kStringEncodingMask & kOneByteStringTag) != 0);
6095 STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0); 6095 STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0);
6096 __ tst(r1, Operand(kStringEncodingMask)); 6096 __ tst(r1, Operand(kStringEncodingMask));
6097 __ b(eq, &two_byte_slice); 6097 __ b(eq, &two_byte_slice);
6098 __ AllocateAsciiSlicedString(r0, r2, r6, r7, &runtime); 6098 __ AllocateAsciiSlicedString(r0, r2, r6, r7, &runtime);
6099 __ jmp(&set_slice_header); 6099 __ jmp(&set_slice_header);
6100 __ bind(&two_byte_slice); 6100 __ bind(&two_byte_slice);
6101 __ AllocateTwoByteSlicedString(r0, r2, r6, r7, &runtime); 6101 __ AllocateTwoByteSlicedString(r0, r2, r6, r7, &runtime);
6102 __ bind(&set_slice_header); 6102 __ bind(&set_slice_header);
6103 __ mov(r3, Operand(r3, LSL, 1)); 6103 __ mov(r3, Operand(r3, LSL, 1));
6104 __ str(r5, FieldMemOperand(r0, SlicedString::kParentOffset)); 6104 __ str(r5, FieldMemOperand(r0, SlicedString::kParentOffset));
(...skipping 22 matching lines...) Expand all
6127 // r5 already points to the first character of underlying string. 6127 // r5 already points to the first character of underlying string.
6128 __ jmp(&allocate_result); 6128 __ jmp(&allocate_result);
6129 6129
6130 __ bind(&sequential_string); 6130 __ bind(&sequential_string);
6131 // Locate first character of underlying subject string. 6131 // Locate first character of underlying subject string.
6132 STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqAsciiString::kHeaderSize); 6132 STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqAsciiString::kHeaderSize);
6133 __ add(r5, r5, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag)); 6133 __ add(r5, r5, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag));
6134 6134
6135 __ bind(&allocate_result); 6135 __ bind(&allocate_result);
6136 // Sequential acii string. Allocate the result. 6136 // Sequential acii string. Allocate the result.
6137 STATIC_ASSERT((kAsciiStringTag & kStringEncodingMask) != 0); 6137 STATIC_ASSERT((kOneByteStringTag & kStringEncodingMask) != 0);
6138 __ tst(r1, Operand(kStringEncodingMask)); 6138 __ tst(r1, Operand(kStringEncodingMask));
6139 __ b(eq, &two_byte_sequential); 6139 __ b(eq, &two_byte_sequential);
6140 6140
6141 // Allocate and copy the resulting ASCII string. 6141 // Allocate and copy the resulting ASCII string.
6142 __ AllocateAsciiString(r0, r2, r4, r6, r7, &runtime); 6142 __ AllocateAsciiString(r0, r2, r4, r6, r7, &runtime);
6143 6143
6144 // Locate first character of substring to copy. 6144 // Locate first character of substring to copy.
6145 __ add(r5, r5, r3); 6145 __ add(r5, r5, r3);
6146 // Locate first character of result. 6146 // Locate first character of result.
6147 __ add(r1, r0, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag)); 6147 __ add(r1, r0, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag));
(...skipping 344 matching lines...) Expand 10 before | Expand all | Expand 10 after
6492 6492
6493 __ bind(&non_ascii); 6493 __ bind(&non_ascii);
6494 // At least one of the strings is two-byte. Check whether it happens 6494 // At least one of the strings is two-byte. Check whether it happens
6495 // to contain only ASCII characters. 6495 // to contain only ASCII characters.
6496 // r4: first instance type. 6496 // r4: first instance type.
6497 // r5: second instance type. 6497 // r5: second instance type.
6498 __ tst(r4, Operand(kAsciiDataHintMask)); 6498 __ tst(r4, Operand(kAsciiDataHintMask));
6499 __ tst(r5, Operand(kAsciiDataHintMask), ne); 6499 __ tst(r5, Operand(kAsciiDataHintMask), ne);
6500 __ b(ne, &ascii_data); 6500 __ b(ne, &ascii_data);
6501 __ eor(r4, r4, Operand(r5)); 6501 __ eor(r4, r4, Operand(r5));
6502 STATIC_ASSERT(kAsciiStringTag != 0 && kAsciiDataHintTag != 0); 6502 STATIC_ASSERT(kOneByteStringTag != 0 && kAsciiDataHintTag != 0);
6503 __ and_(r4, r4, Operand(kAsciiStringTag | kAsciiDataHintTag)); 6503 __ and_(r4, r4, Operand(kOneByteStringTag | kAsciiDataHintTag));
6504 __ cmp(r4, Operand(kAsciiStringTag | kAsciiDataHintTag)); 6504 __ cmp(r4, Operand(kOneByteStringTag | kAsciiDataHintTag));
6505 __ b(eq, &ascii_data); 6505 __ b(eq, &ascii_data);
6506 6506
6507 // Allocate a two byte cons string. 6507 // Allocate a two byte cons string.
6508 __ AllocateTwoByteConsString(r7, r6, r4, r5, &call_runtime); 6508 __ AllocateTwoByteConsString(r7, r6, r4, r5, &call_runtime);
6509 __ jmp(&allocated); 6509 __ jmp(&allocated);
6510 6510
6511 // We cannot encounter sliced strings or cons strings here since: 6511 // We cannot encounter sliced strings or cons strings here since:
6512 STATIC_ASSERT(SlicedString::kMinLength >= ConsString::kMinLength); 6512 STATIC_ASSERT(SlicedString::kMinLength >= ConsString::kMinLength);
6513 // Handle creating a flat result from either external or sequential strings. 6513 // Handle creating a flat result from either external or sequential strings.
6514 // Locate the first characters' locations. 6514 // Locate the first characters' locations.
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7629 7629
7630 __ Pop(lr, r5, r1); 7630 __ Pop(lr, r5, r1);
7631 __ Ret(); 7631 __ Ret();
7632 } 7632 }
7633 7633
7634 #undef __ 7634 #undef __
7635 7635
7636 } } // namespace v8::internal 7636 } } // namespace v8::internal
7637 7637
7638 #endif // V8_TARGET_ARCH_ARM 7638 #endif // V8_TARGET_ARCH_ARM
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