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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 #include <limits.h> // For LONG_MIN, LONG_MAX. | 5 #include <limits.h> // For LONG_MIN, LONG_MAX. |
6 | 6 |
7 #if V8_TARGET_ARCH_MIPS64 | 7 #if V8_TARGET_ARCH_MIPS64 |
8 | 8 |
9 #include "src/base/division-by-constant.h" | 9 #include "src/base/division-by-constant.h" |
10 #include "src/bootstrapper.h" | 10 #include "src/bootstrapper.h" |
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6705 li(result_reg, Operand(255)); | 6705 li(result_reg, Operand(255)); |
6706 Branch(&done); | 6706 Branch(&done); |
6707 | 6707 |
6708 // In 0-255 range, round and truncate. | 6708 // In 0-255 range, round and truncate. |
6709 bind(&in_bounds); | 6709 bind(&in_bounds); |
6710 cvt_w_d(temp_double_reg, input_reg); | 6710 cvt_w_d(temp_double_reg, input_reg); |
6711 mfc1(result_reg, temp_double_reg); | 6711 mfc1(result_reg, temp_double_reg); |
6712 bind(&done); | 6712 bind(&done); |
6713 } | 6713 } |
6714 | 6714 |
6715 | 6715 void MacroAssembler::TestJSArrayForAllocationMemento(Register receiver_reg, |
6716 void MacroAssembler::TestJSArrayForAllocationMemento( | 6716 Register scratch_reg, |
6717 Register receiver_reg, | 6717 Label* no_memento_found) { |
6718 Register scratch_reg, | 6718 Label map_check; |
6719 Label* no_memento_found, | 6719 Label top_check; |
6720 Condition cond, | |
6721 Label* allocation_memento_present) { | |
6722 ExternalReference new_space_start = | |
6723 ExternalReference::new_space_start(isolate()); | |
6724 ExternalReference new_space_allocation_top = | 6720 ExternalReference new_space_allocation_top = |
6725 ExternalReference::new_space_allocation_top_address(isolate()); | 6721 ExternalReference::new_space_allocation_top_address(isolate()); |
6726 Daddu(scratch_reg, receiver_reg, | 6722 const int kMementoMapOffset = JSArray::kSize - kHeapObjectTag; |
6727 Operand(JSArray::kSize + AllocationMemento::kSize - kHeapObjectTag)); | 6723 const int kMementoEndOffset = kMementoMapOffset + AllocationMemento::kSize; |
6728 Branch(no_memento_found, lt, scratch_reg, Operand(new_space_start)); | 6724 |
| 6725 // Bail out if the object is not in new space. |
| 6726 JumpIfNotInNewSpace(receiver_reg, scratch_reg, no_memento_found); |
| 6727 // If the object is in new space, we need to check whether it is on the same |
| 6728 // page as the current top. |
| 6729 Addu(scratch_reg, receiver_reg, Operand(kMementoEndOffset)); |
| 6730 Xor(scratch_reg, scratch_reg, Operand(new_space_allocation_top)); |
| 6731 And(scratch_reg, scratch_reg, Operand(~Page::kPageAlignmentMask)); |
| 6732 Branch(&top_check, eq, scratch_reg, Operand(zero_reg)); |
| 6733 // The object is on a different page than allocation top. Bail out if the |
| 6734 // object sits on the page boundary as no memento can follow and we cannot |
| 6735 // touch the memory following it. |
| 6736 Addu(scratch_reg, receiver_reg, Operand(kMementoEndOffset)); |
| 6737 Xor(scratch_reg, scratch_reg, Operand(receiver_reg)); |
| 6738 And(scratch_reg, scratch_reg, Operand(~Page::kPageAlignmentMask)); |
| 6739 Branch(no_memento_found, ne, scratch_reg, Operand(zero_reg)); |
| 6740 // Continue with the actual map check. |
| 6741 jmp(&map_check); |
| 6742 // If top is on the same page as the current object, we need to check whether |
| 6743 // we are below top. |
| 6744 bind(&top_check); |
| 6745 Addu(scratch_reg, receiver_reg, Operand(kMementoEndOffset)); |
6729 li(at, Operand(new_space_allocation_top)); | 6746 li(at, Operand(new_space_allocation_top)); |
6730 ld(at, MemOperand(at)); | 6747 lw(at, MemOperand(at)); |
6731 Branch(no_memento_found, gt, scratch_reg, Operand(at)); | 6748 Branch(no_memento_found, gt, scratch_reg, Operand(at)); |
6732 ld(scratch_reg, MemOperand(scratch_reg, -AllocationMemento::kSize)); | 6749 // Memento map check. |
6733 if (allocation_memento_present) { | 6750 bind(&map_check); |
6734 Branch(allocation_memento_present, cond, scratch_reg, | 6751 lw(scratch_reg, MemOperand(receiver_reg, kMementoMapOffset)); |
6735 Operand(isolate()->factory()->allocation_memento_map())); | 6752 Branch(no_memento_found, ne, scratch_reg, |
6736 } | 6753 Operand(isolate()->factory()->allocation_memento_map())); |
6737 } | 6754 } |
6738 | 6755 |
6739 | 6756 |
6740 Register GetRegisterThatIsNotOneOf(Register reg1, | 6757 Register GetRegisterThatIsNotOneOf(Register reg1, |
6741 Register reg2, | 6758 Register reg2, |
6742 Register reg3, | 6759 Register reg3, |
6743 Register reg4, | 6760 Register reg4, |
6744 Register reg5, | 6761 Register reg5, |
6745 Register reg6) { | 6762 Register reg6) { |
6746 RegList regs = 0; | 6763 RegList regs = 0; |
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6883 if (mag.shift > 0) sra(result, result, mag.shift); | 6900 if (mag.shift > 0) sra(result, result, mag.shift); |
6884 srl(at, dividend, 31); | 6901 srl(at, dividend, 31); |
6885 Addu(result, result, Operand(at)); | 6902 Addu(result, result, Operand(at)); |
6886 } | 6903 } |
6887 | 6904 |
6888 | 6905 |
6889 } // namespace internal | 6906 } // namespace internal |
6890 } // namespace v8 | 6907 } // namespace v8 |
6891 | 6908 |
6892 #endif // V8_TARGET_ARCH_MIPS64 | 6909 #endif // V8_TARGET_ARCH_MIPS64 |
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