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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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3209 Register to_reg = ToRegister(instr->result()); | 3209 Register to_reg = ToRegister(instr->result()); |
3210 Register from_reg = ToRegister(instr->object()); | 3210 Register from_reg = ToRegister(instr->object()); |
3211 __ ldr(to_reg, FieldMemOperand(from_reg, | 3211 __ ldr(to_reg, FieldMemOperand(from_reg, |
3212 ExternalArray::kExternalPointerOffset)); | 3212 ExternalArray::kExternalPointerOffset)); |
3213 } | 3213 } |
3214 | 3214 |
3215 | 3215 |
3216 void LCodeGen::DoAccessArgumentsAt(LAccessArgumentsAt* instr) { | 3216 void LCodeGen::DoAccessArgumentsAt(LAccessArgumentsAt* instr) { |
3217 Register arguments = ToRegister(instr->arguments()); | 3217 Register arguments = ToRegister(instr->arguments()); |
3218 Register result = ToRegister(instr->result()); | 3218 Register result = ToRegister(instr->result()); |
3219 if (instr->length()->IsConstantOperand() && | 3219 // There are two words between the frame pointer and the last argument. |
3220 instr->index()->IsConstantOperand()) { | 3220 // Subtracting from length accounts for one of them add one more. |
3221 int const_index = ToInteger32(LConstantOperand::cast(instr->index())); | 3221 if (instr->length()->IsConstantOperand()) { |
3222 int const_length = ToInteger32(LConstantOperand::cast(instr->length())); | 3222 int const_length = ToInteger32(LConstantOperand::cast(instr->length())); |
3223 int index = (const_length - const_index) + 1; | 3223 if (instr->index()->IsConstantOperand()) { |
3224 __ ldr(result, MemOperand(arguments, index * kPointerSize)); | 3224 int const_index = ToInteger32(LConstantOperand::cast(instr->index())); |
3225 } else { | 3225 int index = (const_length - const_index) + 1; |
| 3226 __ ldr(result, MemOperand(arguments, index * kPointerSize)); |
| 3227 } else { |
| 3228 Register index = ToRegister(instr->index()); |
| 3229 __ rsb(result, index, Operand(const_length + 1)); |
| 3230 __ ldr(result, MemOperand(arguments, result, LSL, kPointerSizeLog2)); |
| 3231 } |
| 3232 } else if (instr->index()->IsConstantOperand()) { |
| 3233 Register length = ToRegister(instr->length()); |
| 3234 int const_index = ToInteger32(LConstantOperand::cast(instr->index())); |
| 3235 int loc = const_index - 1; |
| 3236 if (loc != 0) { |
| 3237 __ sub(result, length, Operand(loc)); |
| 3238 __ ldr(result, MemOperand(arguments, result, LSL, kPointerSizeLog2)); |
| 3239 } else { |
| 3240 __ ldr(result, MemOperand(arguments, length, LSL, kPointerSizeLog2)); |
| 3241 } |
| 3242 } else { |
3226 Register length = ToRegister(instr->length()); | 3243 Register length = ToRegister(instr->length()); |
3227 Register index = ToRegister(instr->index()); | 3244 Register index = ToRegister(instr->index()); |
3228 // There are two words between the frame pointer and the last argument. | 3245 __ sub(result, length, index); |
3229 // Subtracting from length accounts for one of them add one more. | 3246 __ add(result, result, Operand(1)); |
3230 __ sub(length, length, index); | 3247 __ ldr(result, MemOperand(arguments, result, LSL, kPointerSizeLog2)); |
3231 __ add(length, length, Operand(1)); | |
3232 __ ldr(result, MemOperand(arguments, length, LSL, kPointerSizeLog2)); | |
3233 } | 3248 } |
3234 } | 3249 } |
3235 | 3250 |
3236 | 3251 |
3237 void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) { | 3252 void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) { |
3238 Register external_pointer = ToRegister(instr->elements()); | 3253 Register external_pointer = ToRegister(instr->elements()); |
3239 Register key = no_reg; | 3254 Register key = no_reg; |
3240 ElementsKind elements_kind = instr->elements_kind(); | 3255 ElementsKind elements_kind = instr->elements_kind(); |
3241 bool key_is_constant = instr->key()->IsConstantOperand(); | 3256 bool key_is_constant = instr->key()->IsConstantOperand(); |
3242 int constant_key = 0; | 3257 int constant_key = 0; |
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5933 __ sub(scratch, result, Operand::PointerOffsetFromSmiKey(index)); | 5948 __ sub(scratch, result, Operand::PointerOffsetFromSmiKey(index)); |
5934 __ ldr(result, FieldMemOperand(scratch, | 5949 __ ldr(result, FieldMemOperand(scratch, |
5935 FixedArray::kHeaderSize - kPointerSize)); | 5950 FixedArray::kHeaderSize - kPointerSize)); |
5936 __ bind(&done); | 5951 __ bind(&done); |
5937 } | 5952 } |
5938 | 5953 |
5939 | 5954 |
5940 #undef __ | 5955 #undef __ |
5941 | 5956 |
5942 } } // namespace v8::internal | 5957 } } // namespace v8::internal |
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