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Issue 7776007: Small fix for STATIC_ASSERT. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 9 years, 3 months ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 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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4534 // subject: Subject string 4534 // subject: Subject string
4535 // a0: instance type if Subject string 4535 // a0: instance type if Subject string
4536 // regexp_data: RegExp data (FixedArray) 4536 // regexp_data: RegExp data (FixedArray)
4537 // Check for flat cons string or sliced string. 4537 // Check for flat cons string or sliced string.
4538 // A flat cons string is a cons string where the second part is the empty 4538 // A flat cons string is a cons string where the second part is the empty
4539 // string. In that case the subject string is just the first part of the cons 4539 // string. In that case the subject string is just the first part of the cons
4540 // string. Also in this case the first part of the cons string is known to be 4540 // string. Also in this case the first part of the cons string is known to be
4541 // a sequential string or an external string. 4541 // a sequential string or an external string.
4542 // In the case of a sliced string its offset has to be taken into account. 4542 // In the case of a sliced string its offset has to be taken into account.
4543 Label cons_string, check_encoding; 4543 Label cons_string, check_encoding;
4544 STATIC_ASSERT((kConsStringTag < kExternalStringTag)); 4544 STATIC_ASSERT(kConsStringTag < kExternalStringTag);
4545 STATIC_ASSERT((kSlicedStringTag > kExternalStringTag)); 4545 STATIC_ASSERT(kSlicedStringTag > kExternalStringTag);
4546 __ Branch(&cons_string, lt, at, Operand(kExternalStringTag)); 4546 __ Branch(&cons_string, lt, at, Operand(kExternalStringTag));
4547 __ Branch(&runtime, eq, at, Operand(kExternalStringTag)); 4547 __ Branch(&runtime, eq, at, Operand(kExternalStringTag));
4548 4548
4549 // String is sliced. 4549 // String is sliced.
4550 __ lw(t0, FieldMemOperand(subject, SlicedString::kOffsetOffset)); 4550 __ lw(t0, FieldMemOperand(subject, SlicedString::kOffsetOffset));
4551 __ sra(t0, t0, kSmiTagSize); 4551 __ sra(t0, t0, kSmiTagSize);
4552 __ lw(subject, FieldMemOperand(subject, SlicedString::kParentOffset)); 4552 __ lw(subject, FieldMemOperand(subject, SlicedString::kParentOffset));
4553 // t5: offset of sliced string, smi-tagged. 4553 // t5: offset of sliced string, smi-tagged.
4554 __ jmp(&check_encoding); 4554 __ jmp(&check_encoding);
4555 // String is a cons string, check whether it is flat. 4555 // String is a cons string, check whether it is flat.
(...skipping 462 matching lines...) Expand 10 before | Expand all | Expand 10 after
5018 __ lw(t0, FieldMemOperand(object_, String::kLengthOffset)); 5018 __ lw(t0, FieldMemOperand(object_, String::kLengthOffset));
5019 __ Branch(index_out_of_range_, ls, t0, Operand(scratch_)); 5019 __ Branch(index_out_of_range_, ls, t0, Operand(scratch_));
5020 5020
5021 // We need special handling for non-flat strings. 5021 // We need special handling for non-flat strings.
5022 STATIC_ASSERT(kSeqStringTag == 0); 5022 STATIC_ASSERT(kSeqStringTag == 0);
5023 __ And(t0, result_, Operand(kStringRepresentationMask)); 5023 __ And(t0, result_, Operand(kStringRepresentationMask));
5024 __ Branch(&flat_string, eq, t0, Operand(zero_reg)); 5024 __ Branch(&flat_string, eq, t0, Operand(zero_reg));
5025 5025
5026 // Handle non-flat strings. 5026 // Handle non-flat strings.
5027 __ And(result_, result_, Operand(kStringRepresentationMask)); 5027 __ And(result_, result_, Operand(kStringRepresentationMask));
5028 STATIC_ASSERT((kConsStringTag < kExternalStringTag)); 5028 STATIC_ASSERT(kConsStringTag < kExternalStringTag);
5029 STATIC_ASSERT((kSlicedStringTag > kExternalStringTag)); 5029 STATIC_ASSERT(kSlicedStringTag > kExternalStringTag);
5030 __ Branch(&sliced_string, gt, result_, Operand(kExternalStringTag)); 5030 __ Branch(&sliced_string, gt, result_, Operand(kExternalStringTag));
5031 __ Branch(&call_runtime_, eq, result_, Operand(kExternalStringTag)); 5031 __ Branch(&call_runtime_, eq, result_, Operand(kExternalStringTag));
5032 5032
5033 // ConsString. 5033 // ConsString.
5034 // Check whether the right hand side is the empty string (i.e. if 5034 // Check whether the right hand side is the empty string (i.e. if
5035 // this is really a flat string in a cons string). If that is not 5035 // this is really a flat string in a cons string). If that is not
5036 // the case we would rather go to the runtime system now to flatten 5036 // the case we would rather go to the runtime system now to flatten
5037 // the string. 5037 // the string.
5038 Label assure_seq_string; 5038 Label assure_seq_string;
5039 __ lw(result_, FieldMemOperand(object_, ConsString::kSecondOffset)); 5039 __ lw(result_, FieldMemOperand(object_, ConsString::kSecondOffset));
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6868 __ mov(result, zero_reg); 6868 __ mov(result, zero_reg);
6869 __ Ret(); 6869 __ Ret();
6870 } 6870 }
6871 6871
6872 6872
6873 #undef __ 6873 #undef __
6874 6874
6875 } } // namespace v8::internal 6875 } } // namespace v8::internal
6876 6876
6877 #endif // V8_TARGET_ARCH_MIPS 6877 #endif // V8_TARGET_ARCH_MIPS
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