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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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6030 | 6030 |
6031 | 6031 |
6032 void StringHelper::GenerateHashInit(MacroAssembler* masm, | 6032 void StringHelper::GenerateHashInit(MacroAssembler* masm, |
6033 Register hash, | 6033 Register hash, |
6034 Register character, | 6034 Register character, |
6035 Register scratch) { | 6035 Register scratch) { |
6036 // hash = (seed + character) + ((seed + character) << 10); | 6036 // hash = (seed + character) + ((seed + character) << 10); |
6037 if (Serializer::enabled()) { | 6037 if (Serializer::enabled()) { |
6038 ExternalReference roots_array_start = | 6038 ExternalReference roots_array_start = |
6039 ExternalReference::roots_array_start(masm->isolate()); | 6039 ExternalReference::roots_array_start(masm->isolate()); |
6040 __ mov(scratch, Immediate(Heap::kStringHashSeedRootIndex)); | 6040 __ mov(scratch, Immediate(Heap::kHashSeedRootIndex)); |
6041 __ mov(scratch, Operand::StaticArray(scratch, | 6041 __ mov(scratch, Operand::StaticArray(scratch, |
6042 times_pointer_size, | 6042 times_pointer_size, |
6043 roots_array_start)); | 6043 roots_array_start)); |
6044 __ add(scratch, character); | 6044 __ add(scratch, character); |
6045 __ mov(hash, scratch); | 6045 __ mov(hash, scratch); |
6046 __ shl(scratch, 10); | 6046 __ shl(scratch, 10); |
6047 __ add(hash, scratch); | 6047 __ add(hash, scratch); |
6048 } else { | 6048 } else { |
6049 int32_t seed = masm->isolate()->heap()->StringHashSeed(); | 6049 int32_t seed = masm->isolate()->heap()->HashSeed(); |
6050 __ lea(scratch, Operand(character, seed)); | 6050 __ lea(scratch, Operand(character, seed)); |
6051 __ shl(scratch, 10); | 6051 __ shl(scratch, 10); |
6052 __ lea(hash, Operand(scratch, character, times_1, seed)); | 6052 __ lea(hash, Operand(scratch, character, times_1, seed)); |
6053 } | 6053 } |
6054 // hash ^= hash >> 6; | 6054 // hash ^= hash >> 6; |
6055 __ mov(scratch, hash); | 6055 __ mov(scratch, hash); |
6056 __ shr(scratch, 6); | 6056 __ shr(scratch, 6); |
6057 __ xor_(hash, scratch); | 6057 __ xor_(hash, scratch); |
6058 } | 6058 } |
6059 | 6059 |
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7344 false); | 7344 false); |
7345 __ pop(edx); | 7345 __ pop(edx); |
7346 __ ret(0); | 7346 __ ret(0); |
7347 } | 7347 } |
7348 | 7348 |
7349 #undef __ | 7349 #undef __ |
7350 | 7350 |
7351 } } // namespace v8::internal | 7351 } } // namespace v8::internal |
7352 | 7352 |
7353 #endif // V8_TARGET_ARCH_IA32 | 7353 #endif // V8_TARGET_ARCH_IA32 |
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