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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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3030 Register to_reg = ToRegister(instr->result()); | 3030 Register to_reg = ToRegister(instr->result()); |
3031 Register from_reg = ToRegister(instr->object()); | 3031 Register from_reg = ToRegister(instr->object()); |
3032 __ lw(to_reg, FieldMemOperand(from_reg, | 3032 __ lw(to_reg, FieldMemOperand(from_reg, |
3033 ExternalArray::kExternalPointerOffset)); | 3033 ExternalArray::kExternalPointerOffset)); |
3034 } | 3034 } |
3035 | 3035 |
3036 | 3036 |
3037 void LCodeGen::DoAccessArgumentsAt(LAccessArgumentsAt* instr) { | 3037 void LCodeGen::DoAccessArgumentsAt(LAccessArgumentsAt* instr) { |
3038 Register arguments = ToRegister(instr->arguments()); | 3038 Register arguments = ToRegister(instr->arguments()); |
3039 Register result = ToRegister(instr->result()); | 3039 Register result = ToRegister(instr->result()); |
3040 if (instr->length()->IsConstantOperand() && | 3040 // There are two words between the frame pointer and the last argument. |
3041 instr->index()->IsConstantOperand()) { | 3041 // Subtracting from length accounts for one of them add one more. |
| 3042 if (instr->length()->IsConstantOperand()) { |
| 3043 int const_length = ToInteger32(LConstantOperand::cast(instr->length())); |
| 3044 if (instr->index()->IsConstantOperand()) { |
| 3045 int const_index = ToInteger32(LConstantOperand::cast(instr->index())); |
| 3046 int index = (const_length - const_index) + 1; |
| 3047 __ lw(result, MemOperand(arguments, index * kPointerSize)); |
| 3048 } else { |
| 3049 Register index = ToRegister(instr->index()); |
| 3050 __ li(at, Operand(const_length + 1)); |
| 3051 __ Subu(result, at, index); |
| 3052 __ sll(at, result, kPointerSizeLog2); |
| 3053 __ Addu(at, arguments, at); |
| 3054 __ lw(result, MemOperand(at)); |
| 3055 } |
| 3056 } else if (instr->index()->IsConstantOperand()) { |
| 3057 Register length = ToRegister(instr->length()); |
3042 int const_index = ToInteger32(LConstantOperand::cast(instr->index())); | 3058 int const_index = ToInteger32(LConstantOperand::cast(instr->index())); |
3043 int const_length = ToInteger32(LConstantOperand::cast(instr->length())); | 3059 int loc = const_index - 1; |
3044 int index = (const_length - const_index) + 1; | 3060 if (loc != 0) { |
3045 __ lw(result, MemOperand(arguments, index * kPointerSize)); | 3061 __ Subu(result, length, Operand(loc)); |
| 3062 __ sll(at, result, kPointerSizeLog2); |
| 3063 __ Addu(at, arguments, at); |
| 3064 __ lw(result, MemOperand(at)); |
| 3065 } else { |
| 3066 __ sll(at, length, kPointerSizeLog2); |
| 3067 __ Addu(at, arguments, at); |
| 3068 __ lw(result, MemOperand(at)); |
| 3069 } |
3046 } else { | 3070 } else { |
3047 Register length = ToRegister(instr->length()); | 3071 Register length = ToRegister(instr->length()); |
3048 Register index = ToRegister(instr->index()); | 3072 Register index = ToRegister(instr->index()); |
3049 // There are two words between the frame pointer and the last argument. | 3073 __ Subu(result, length, index); |
3050 // Subtracting from length accounts for one of them, add one more. | 3074 __ Addu(result, result, 1); |
3051 __ subu(length, length, index); | 3075 __ sll(at, result, kPointerSizeLog2); |
3052 __ Addu(length, length, Operand(1)); | 3076 __ Addu(at, arguments, at); |
3053 __ sll(length, length, kPointerSizeLog2); | 3077 __ lw(result, MemOperand(at)); |
3054 __ Addu(at, arguments, Operand(length)); | |
3055 __ lw(result, MemOperand(at, 0)); | |
3056 } | 3078 } |
3057 } | 3079 } |
3058 | 3080 |
3059 | 3081 |
3060 void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) { | 3082 void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) { |
3061 Register external_pointer = ToRegister(instr->elements()); | 3083 Register external_pointer = ToRegister(instr->elements()); |
3062 Register key = no_reg; | 3084 Register key = no_reg; |
3063 ElementsKind elements_kind = instr->elements_kind(); | 3085 ElementsKind elements_kind = instr->elements_kind(); |
3064 bool key_is_constant = instr->key()->IsConstantOperand(); | 3086 bool key_is_constant = instr->key()->IsConstantOperand(); |
3065 int constant_key = 0; | 3087 int constant_key = 0; |
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5823 __ Subu(scratch, result, scratch); | 5845 __ Subu(scratch, result, scratch); |
5824 __ lw(result, FieldMemOperand(scratch, | 5846 __ lw(result, FieldMemOperand(scratch, |
5825 FixedArray::kHeaderSize - kPointerSize)); | 5847 FixedArray::kHeaderSize - kPointerSize)); |
5826 __ bind(&done); | 5848 __ bind(&done); |
5827 } | 5849 } |
5828 | 5850 |
5829 | 5851 |
5830 #undef __ | 5852 #undef __ |
5831 | 5853 |
5832 } } // namespace v8::internal | 5854 } } // namespace v8::internal |
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