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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 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 #ifndef V8_ARM64_LITHIUM_GAP_RESOLVER_ARM64_H_ | 5 #ifndef V8_ARM64_LITHIUM_GAP_RESOLVER_ARM64_H_ |
6 #define V8_ARM64_LITHIUM_GAP_RESOLVER_ARM64_H_ | 6 #define V8_ARM64_LITHIUM_GAP_RESOLVER_ARM64_H_ |
7 | 7 |
8 #include "src/v8.h" | 8 #include "src/v8.h" |
9 | 9 |
10 #include "src/arm64/delayed-masm-arm64.h" | 10 #include "src/arm64/delayed-masm-arm64.h" |
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61 // Emit a move from one stack slot to another. | 61 // Emit a move from one stack slot to another. |
62 void EmitStackSlotMove(int index) { | 62 void EmitStackSlotMove(int index) { |
63 masm_.StackSlotMove(moves_[index].source(), moves_[index].destination()); | 63 masm_.StackSlotMove(moves_[index].source(), moves_[index].destination()); |
64 } | 64 } |
65 | 65 |
66 // Verify the move list before performing moves. | 66 // Verify the move list before performing moves. |
67 void Verify(); | 67 void Verify(); |
68 | 68 |
69 // Registers used to solve cycles. | 69 // Registers used to solve cycles. |
70 const Register& SavedValueRegister() { | 70 const Register& SavedValueRegister() { |
71 ASSERT(!masm_.ScratchRegister().IsAllocatable()); | 71 DCHECK(!masm_.ScratchRegister().IsAllocatable()); |
72 return masm_.ScratchRegister(); | 72 return masm_.ScratchRegister(); |
73 } | 73 } |
74 // The scratch register is used to break cycles and to store constant. | 74 // The scratch register is used to break cycles and to store constant. |
75 // These two methods switch from one mode to the other. | 75 // These two methods switch from one mode to the other. |
76 void AcquireSavedValueRegister() { masm_.AcquireScratchRegister(); } | 76 void AcquireSavedValueRegister() { masm_.AcquireScratchRegister(); } |
77 void ReleaseSavedValueRegister() { masm_.ReleaseScratchRegister(); } | 77 void ReleaseSavedValueRegister() { masm_.ReleaseScratchRegister(); } |
78 const FPRegister& SavedFPValueRegister() { | 78 const FPRegister& SavedFPValueRegister() { |
79 // We use the Crankshaft floating-point scratch register to break a cycle | 79 // We use the Crankshaft floating-point scratch register to break a cycle |
80 // involving double values as the MacroAssembler will not need it for the | 80 // involving double values as the MacroAssembler will not need it for the |
81 // operations performed by the gap resolver. | 81 // operations performed by the gap resolver. |
82 ASSERT(!crankshaft_fp_scratch.IsAllocatable()); | 82 DCHECK(!crankshaft_fp_scratch.IsAllocatable()); |
83 return crankshaft_fp_scratch; | 83 return crankshaft_fp_scratch; |
84 } | 84 } |
85 | 85 |
86 LCodeGen* cgen_; | 86 LCodeGen* cgen_; |
87 DelayedGapMasm masm_; | 87 DelayedGapMasm masm_; |
88 | 88 |
89 // List of moves not yet resolved. | 89 // List of moves not yet resolved. |
90 ZoneList<LMoveOperands> moves_; | 90 ZoneList<LMoveOperands> moves_; |
91 | 91 |
92 int root_index_; | 92 int root_index_; |
93 bool in_cycle_; | 93 bool in_cycle_; |
94 LOperand* saved_destination_; | 94 LOperand* saved_destination_; |
95 }; | 95 }; |
96 | 96 |
97 } } // namespace v8::internal | 97 } } // namespace v8::internal |
98 | 98 |
99 #endif // V8_ARM64_LITHIUM_GAP_RESOLVER_ARM64_H_ | 99 #endif // V8_ARM64_LITHIUM_GAP_RESOLVER_ARM64_H_ |
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