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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 #if V8_TARGET_ARCH_ARM64 | 5 #if V8_TARGET_ARCH_ARM64 |
| 6 | 6 |
| 7 #include "src/arm64/assembler-arm64-inl.h" | 7 #include "src/arm64/assembler-arm64-inl.h" |
| 8 #include "src/codegen.h" | 8 #include "src/codegen.h" |
| 9 #include "src/ic/ic.h" | 9 #include "src/ic/ic.h" |
| 10 #include "src/ic/stub-cache.h" | 10 #include "src/ic/stub-cache.h" |
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| 64 LOG(isolate, PatchIC(address, info_address, info.SmiCheckDelta())); | 64 LOG(isolate, PatchIC(address, info_address, info.SmiCheckDelta())); |
| 65 } | 65 } |
| 66 | 66 |
| 67 // Patch and activate code generated by JumpPatchSite::EmitJumpIfNotSmi() | 67 // Patch and activate code generated by JumpPatchSite::EmitJumpIfNotSmi() |
| 68 // and JumpPatchSite::EmitJumpIfSmi(). | 68 // and JumpPatchSite::EmitJumpIfSmi(). |
| 69 // Changing | 69 // Changing |
| 70 // tb(n)z xzr, #0, <target> | 70 // tb(n)z xzr, #0, <target> |
| 71 // to | 71 // to |
| 72 // tb(!n)z test_reg, #0, <target> | 72 // tb(!n)z test_reg, #0, <target> |
| 73 Instruction* to_patch = info.SmiCheck(); | 73 Instruction* to_patch = info.SmiCheck(); |
| 74 PatchingAssembler patcher(isolate, to_patch, 1); | 74 PatchingAssembler patcher(isolate, reinterpret_cast<byte*>(to_patch), 1); |
| 75 DCHECK(to_patch->IsTestBranch()); | 75 DCHECK(to_patch->IsTestBranch()); |
| 76 DCHECK(to_patch->ImmTestBranchBit5() == 0); | 76 DCHECK(to_patch->ImmTestBranchBit5() == 0); |
| 77 DCHECK(to_patch->ImmTestBranchBit40() == 0); | 77 DCHECK(to_patch->ImmTestBranchBit40() == 0); |
| 78 | 78 |
| 79 STATIC_ASSERT(kSmiTag == 0); | 79 STATIC_ASSERT(kSmiTag == 0); |
| 80 STATIC_ASSERT(kSmiTagMask == 1); | 80 STATIC_ASSERT(kSmiTagMask == 1); |
| 81 | 81 |
| 82 int branch_imm = to_patch->ImmTestBranch(); | 82 int branch_imm = to_patch->ImmTestBranch(); |
| 83 Register smi_reg; | 83 Register smi_reg; |
| 84 if (check == ENABLE_INLINED_SMI_CHECK) { | 84 if (check == ENABLE_INLINED_SMI_CHECK) { |
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| 96 } else { | 96 } else { |
| 97 DCHECK(to_patch->Mask(TestBranchMask) == TBNZ); | 97 DCHECK(to_patch->Mask(TestBranchMask) == TBNZ); |
| 98 // This is JumpIfSmi(smi_reg, branch_imm). | 98 // This is JumpIfSmi(smi_reg, branch_imm). |
| 99 patcher.tbz(smi_reg, 0, branch_imm); | 99 patcher.tbz(smi_reg, 0, branch_imm); |
| 100 } | 100 } |
| 101 } | 101 } |
| 102 } // namespace internal | 102 } // namespace internal |
| 103 } // namespace v8 | 103 } // namespace v8 |
| 104 | 104 |
| 105 #endif // V8_TARGET_ARCH_ARM64 | 105 #endif // V8_TARGET_ARCH_ARM64 |
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