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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 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #if V8_TARGET_ARCH_MIPS64 | 5 #if V8_TARGET_ARCH_MIPS64 |
| 6 | 6 |
| 7 // Note on Mips implementation: | 7 // Note on Mips implementation: |
| 8 // | 8 // |
| 9 // The result_register() for mips is the 'v0' register, which is defined | 9 // The result_register() for mips is the 'v0' register, which is defined |
| 10 // by the ABI to contain function return values. However, the first | 10 // by the ABI to contain function return values. However, the first |
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| 4272 __ SmiUntag(scratch1); | 4272 __ SmiUntag(scratch1); |
| 4273 __ Dmul(scratch2, array_length, scratch1); | 4273 __ Dmul(scratch2, array_length, scratch1); |
| 4274 // Check for smi overflow. No overflow if higher 33 bits of 64-bit result are | 4274 // Check for smi overflow. No overflow if higher 33 bits of 64-bit result are |
| 4275 // zero. | 4275 // zero. |
| 4276 __ dsra32(scratch1, scratch2, 0); | 4276 __ dsra32(scratch1, scratch2, 0); |
| 4277 __ Branch(&bailout, ne, scratch2, Operand(zero_reg)); | 4277 __ Branch(&bailout, ne, scratch2, Operand(zero_reg)); |
| 4278 __ SmiUntag(string_length); | 4278 __ SmiUntag(string_length); |
| 4279 __ AdduAndCheckForOverflow(string_length, string_length, scratch2, scratch3); | 4279 __ AdduAndCheckForOverflow(string_length, string_length, scratch2, scratch3); |
| 4280 __ BranchOnOverflow(&bailout, scratch3); | 4280 __ BranchOnOverflow(&bailout, scratch3); |
| 4281 | 4281 |
| 4282 // Bailout for large object allocations. |
| 4283 __ Branch(&bailout, gt, string_length, |
| 4284 Operand(Page::kMaxRegularHeapObjectSize)); |
| 4285 |
| 4282 // Get first element in the array to free up the elements register to be used | 4286 // Get first element in the array to free up the elements register to be used |
| 4283 // for the result. | 4287 // for the result. |
| 4284 __ Daddu(element, | 4288 __ Daddu(element, |
| 4285 elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); | 4289 elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 4286 result = elements; // End of live range for elements. | 4290 result = elements; // End of live range for elements. |
| 4287 elements = no_reg; | 4291 elements = no_reg; |
| 4288 // Live values in registers: | 4292 // Live values in registers: |
| 4289 // element: First array element | 4293 // element: First array element |
| 4290 // separator: Separator string | 4294 // separator: Separator string |
| 4291 // string_length: Length of result string (not smi) | 4295 // string_length: Length of result string (not smi) |
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| 5262 reinterpret_cast<uint64_t>( | 5266 reinterpret_cast<uint64_t>( |
| 5263 isolate->builtins()->OsrAfterStackCheck()->entry())); | 5267 isolate->builtins()->OsrAfterStackCheck()->entry())); |
| 5264 return OSR_AFTER_STACK_CHECK; | 5268 return OSR_AFTER_STACK_CHECK; |
| 5265 } | 5269 } |
| 5266 | 5270 |
| 5267 | 5271 |
| 5268 } // namespace internal | 5272 } // namespace internal |
| 5269 } // namespace v8 | 5273 } // namespace v8 |
| 5270 | 5274 |
| 5271 #endif // V8_TARGET_ARCH_MIPS64 | 5275 #endif // V8_TARGET_ARCH_MIPS64 |
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