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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/codegen.h" | 7 #include "src/codegen.h" |
| 8 #include "src/ic/ic.h" | 8 #include "src/ic/ic.h" |
| 9 #include "src/ic/ic-compiler.h" | 9 #include "src/ic/ic-compiler.h" |
| 10 #include "src/ic/stub-cache.h" | 10 #include "src/ic/stub-cache.h" |
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| 814 // function which is requesting this patch operation. | 814 // function which is requesting this patch operation. |
| 815 Address info_address = Assembler::return_address_from_call_start(address); | 815 Address info_address = Assembler::return_address_from_call_start(address); |
| 816 InlineSmiCheckInfo info(info_address); | 816 InlineSmiCheckInfo info(info_address); |
| 817 | 817 |
| 818 // Check and decode the patch information instruction. | 818 // Check and decode the patch information instruction. |
| 819 if (!info.HasSmiCheck()) { | 819 if (!info.HasSmiCheck()) { |
| 820 return; | 820 return; |
| 821 } | 821 } |
| 822 | 822 |
| 823 if (FLAG_trace_ic) { | 823 if (FLAG_trace_ic) { |
| 824 PrintF("[ Patching ic at %p, marker=%p, SMI check=%p\n", address, | 824 PrintF("[ Patching ic at %p, marker=%p, SMI check=%p\n", |
| 825 info_address, reinterpret_cast<void*>(info.SmiCheck())); | 825 static_cast<void*>(address), static_cast<void*>(info_address), |
| 826 static_cast<void*>(info.SmiCheck())); |
| 826 } | 827 } |
| 827 | 828 |
| 828 // Patch and activate code generated by JumpPatchSite::EmitJumpIfNotSmi() | 829 // Patch and activate code generated by JumpPatchSite::EmitJumpIfNotSmi() |
| 829 // and JumpPatchSite::EmitJumpIfSmi(). | 830 // and JumpPatchSite::EmitJumpIfSmi(). |
| 830 // Changing | 831 // Changing |
| 831 // tb(n)z xzr, #0, <target> | 832 // tb(n)z xzr, #0, <target> |
| 832 // to | 833 // to |
| 833 // tb(!n)z test_reg, #0, <target> | 834 // tb(!n)z test_reg, #0, <target> |
| 834 Instruction* to_patch = info.SmiCheck(); | 835 Instruction* to_patch = info.SmiCheck(); |
| 835 PatchingAssembler patcher(isolate, to_patch, 1); | 836 PatchingAssembler patcher(isolate, to_patch, 1); |
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| 857 } else { | 858 } else { |
| 858 DCHECK(to_patch->Mask(TestBranchMask) == TBNZ); | 859 DCHECK(to_patch->Mask(TestBranchMask) == TBNZ); |
| 859 // This is JumpIfSmi(smi_reg, branch_imm). | 860 // This is JumpIfSmi(smi_reg, branch_imm). |
| 860 patcher.tbz(smi_reg, 0, branch_imm); | 861 patcher.tbz(smi_reg, 0, branch_imm); |
| 861 } | 862 } |
| 862 } | 863 } |
| 863 } // namespace internal | 864 } // namespace internal |
| 864 } // namespace v8 | 865 } // namespace v8 |
| 865 | 866 |
| 866 #endif // V8_TARGET_ARCH_ARM64 | 867 #endif // V8_TARGET_ARCH_ARM64 |
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