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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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| 331 } | 331 } |
| 332 | 332 |
| 333 // Check that the key (index) is within bounds. | 333 // Check that the key (index) is within bounds. |
| 334 __ lw(scratch1, FieldMemOperand(elements, FixedArray::kLengthOffset)); | 334 __ lw(scratch1, FieldMemOperand(elements, FixedArray::kLengthOffset)); |
| 335 __ Branch(out_of_range, hs, key, Operand(scratch1)); | 335 __ Branch(out_of_range, hs, key, Operand(scratch1)); |
| 336 | 336 |
| 337 // Fast case: Do the load. | 337 // Fast case: Do the load. |
| 338 __ Addu(scratch1, elements, | 338 __ Addu(scratch1, elements, |
| 339 Operand(FixedArray::kHeaderSize - kHeapObjectTag)); | 339 Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 340 // The key is a smi. | 340 // The key is a smi. |
| 341 ASSERT(kSmiTag == 0 && kSmiTagSize < kPointerSizeLog2); | 341 STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize < kPointerSizeLog2); |
| 342 __ sll(at, key, kPointerSizeLog2 - kSmiTagSize); | 342 __ sll(at, key, kPointerSizeLog2 - kSmiTagSize); |
| 343 __ addu(at, at, scratch1); | 343 __ addu(at, at, scratch1); |
| 344 __ lw(scratch2, MemOperand(at)); | 344 __ lw(scratch2, MemOperand(at)); |
| 345 | 345 |
| 346 __ LoadRoot(at, Heap::kTheHoleValueRootIndex); | 346 __ LoadRoot(at, Heap::kTheHoleValueRootIndex); |
| 347 // In case the loaded value is the_hole we have to consult GetProperty | 347 // In case the loaded value is the_hole we have to consult GetProperty |
| 348 // to ensure the prototype chain is searched. | 348 // to ensure the prototype chain is searched. |
| 349 __ Branch(out_of_range, eq, scratch2, Operand(at)); | 349 __ Branch(out_of_range, eq, scratch2, Operand(at)); |
| 350 __ mov(result, scratch2); | 350 __ mov(result, scratch2); |
| 351 } | 351 } |
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| 365 __ Branch(not_symbol, ge, hash, Operand(FIRST_NONSTRING_TYPE)); | 365 __ Branch(not_symbol, ge, hash, Operand(FIRST_NONSTRING_TYPE)); |
| 366 | 366 |
| 367 // Is the string an array index, with cached numeric value? | 367 // Is the string an array index, with cached numeric value? |
| 368 __ lw(hash, FieldMemOperand(key, String::kHashFieldOffset)); | 368 __ lw(hash, FieldMemOperand(key, String::kHashFieldOffset)); |
| 369 __ And(at, hash, Operand(String::kContainsCachedArrayIndexMask)); | 369 __ And(at, hash, Operand(String::kContainsCachedArrayIndexMask)); |
| 370 __ Branch(index_string, eq, at, Operand(zero_reg)); | 370 __ Branch(index_string, eq, at, Operand(zero_reg)); |
| 371 | 371 |
| 372 // Is the string a symbol? | 372 // Is the string a symbol? |
| 373 // map: key map | 373 // map: key map |
| 374 __ lbu(hash, FieldMemOperand(map, Map::kInstanceTypeOffset)); | 374 __ lbu(hash, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| 375 ASSERT(kSymbolTag != 0); | 375 STATIC_ASSERT(kSymbolTag != 0); |
| 376 __ And(at, hash, Operand(kIsSymbolMask)); | 376 __ And(at, hash, Operand(kIsSymbolMask)); |
| 377 __ Branch(not_symbol, eq, at, Operand(zero_reg)); | 377 __ Branch(not_symbol, eq, at, Operand(zero_reg)); |
| 378 } | 378 } |
| 379 | 379 |
| 380 | 380 |
| 381 // Defined in ic.cc. | 381 // Defined in ic.cc. |
| 382 Object* CallIC_Miss(Arguments args); | 382 Object* CallIC_Miss(Arguments args); |
| 383 | 383 |
| 384 // The generated code does not accept smi keys. | 384 // The generated code does not accept smi keys. |
| 385 // The generated code falls through if both probes miss. | 385 // The generated code falls through if both probes miss. |
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| 1262 // element to the array by writing to array[array.length]. | 1262 // element to the array by writing to array[array.length]. |
| 1263 | 1263 |
| 1264 __ bind(&extra); | 1264 __ bind(&extra); |
| 1265 // Only support writing to array[array.length]. | 1265 // Only support writing to array[array.length]. |
| 1266 __ Branch(&slow, ne, key, Operand(t0)); | 1266 __ Branch(&slow, ne, key, Operand(t0)); |
| 1267 // Check for room in the elements backing store. | 1267 // Check for room in the elements backing store. |
| 1268 // Both the key and the length of FixedArray are smis. | 1268 // Both the key and the length of FixedArray are smis. |
| 1269 __ lw(t0, FieldMemOperand(elements, FixedArray::kLengthOffset)); | 1269 __ lw(t0, FieldMemOperand(elements, FixedArray::kLengthOffset)); |
| 1270 __ Branch(&slow, hs, key, Operand(t0)); | 1270 __ Branch(&slow, hs, key, Operand(t0)); |
| 1271 // Calculate key + 1 as smi. | 1271 // Calculate key + 1 as smi. |
| 1272 ASSERT_EQ(0, kSmiTag); | 1272 STATIC_ASSERT(0 == kSmiTag); |
| 1273 __ Addu(t3, key, Operand(Smi::FromInt(1))); | 1273 __ Addu(t3, key, Operand(Smi::FromInt(1))); |
| 1274 __ sw(t3, FieldMemOperand(receiver, JSArray::kLengthOffset)); | 1274 __ sw(t3, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
| 1275 __ Branch(&fast); | 1275 __ Branch(&fast); |
| 1276 | 1276 |
| 1277 | 1277 |
| 1278 // Array case: Get the length and the elements array from the JS | 1278 // Array case: Get the length and the elements array from the JS |
| 1279 // array. Check that the array is in fast mode (and writable); if it | 1279 // array. Check that the array is in fast mode (and writable); if it |
| 1280 // is the length is always a smi. | 1280 // is the length is always a smi. |
| 1281 | 1281 |
| 1282 __ bind(&array); | 1282 __ bind(&array); |
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| 1631 Register reg = Register::from_code(Assembler::GetRs(instr_at_patch)); | 1631 Register reg = Register::from_code(Assembler::GetRs(instr_at_patch)); |
| 1632 patcher.masm()->andi(at, reg, kSmiTagMask); | 1632 patcher.masm()->andi(at, reg, kSmiTagMask); |
| 1633 patcher.ChangeBranchCondition(eq); | 1633 patcher.ChangeBranchCondition(eq); |
| 1634 } | 1634 } |
| 1635 } | 1635 } |
| 1636 | 1636 |
| 1637 | 1637 |
| 1638 } } // namespace v8::internal | 1638 } } // namespace v8::internal |
| 1639 | 1639 |
| 1640 #endif // V8_TARGET_ARCH_MIPS | 1640 #endif // V8_TARGET_ARCH_MIPS |
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