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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_ARM | 5 #if V8_TARGET_ARCH_ARM |
| 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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| 838 // condition code uses at the patched jump. | 838 // condition code uses at the patched jump. |
| 839 int delta = Assembler::GetCmpImmediateRawImmediate(instr); | 839 int delta = Assembler::GetCmpImmediateRawImmediate(instr); |
| 840 delta += Assembler::GetCmpImmediateRegister(instr).code() * kOff12Mask; | 840 delta += Assembler::GetCmpImmediateRegister(instr).code() * kOff12Mask; |
| 841 // If the delta is 0 the instruction is cmp r0, #0 which also signals that | 841 // If the delta is 0 the instruction is cmp r0, #0 which also signals that |
| 842 // nothing was inlined. | 842 // nothing was inlined. |
| 843 if (delta == 0) { | 843 if (delta == 0) { |
| 844 return; | 844 return; |
| 845 } | 845 } |
| 846 | 846 |
| 847 if (FLAG_trace_ic) { | 847 if (FLAG_trace_ic) { |
| 848 PrintF("[ patching ic at %p, cmp=%p, delta=%d\n", address, | 848 PrintF("[ patching ic at %p, cmp=%p, delta=%d\n", |
| 849 cmp_instruction_address, delta); | 849 static_cast<void*>(address), |
| 850 static_cast<void*>(cmp_instruction_address), delta); |
| 850 } | 851 } |
| 851 | 852 |
| 852 Address patch_address = | 853 Address patch_address = |
| 853 cmp_instruction_address - delta * Instruction::kInstrSize; | 854 cmp_instruction_address - delta * Instruction::kInstrSize; |
| 854 Instr instr_at_patch = Assembler::instr_at(patch_address); | 855 Instr instr_at_patch = Assembler::instr_at(patch_address); |
| 855 Instr branch_instr = | 856 Instr branch_instr = |
| 856 Assembler::instr_at(patch_address + Instruction::kInstrSize); | 857 Assembler::instr_at(patch_address + Instruction::kInstrSize); |
| 857 // This is patching a conditional "jump if not smi/jump if smi" site. | 858 // This is patching a conditional "jump if not smi/jump if smi" site. |
| 858 // Enabling by changing from | 859 // Enabling by changing from |
| 859 // cmp rx, rx | 860 // cmp rx, rx |
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| 879 patcher.EmitCondition(ne); | 880 patcher.EmitCondition(ne); |
| 880 } else { | 881 } else { |
| 881 DCHECK(Assembler::GetCondition(branch_instr) == ne); | 882 DCHECK(Assembler::GetCondition(branch_instr) == ne); |
| 882 patcher.EmitCondition(eq); | 883 patcher.EmitCondition(eq); |
| 883 } | 884 } |
| 884 } | 885 } |
| 885 } // namespace internal | 886 } // namespace internal |
| 886 } // namespace v8 | 887 } // namespace v8 |
| 887 | 888 |
| 888 #endif // V8_TARGET_ARCH_ARM | 889 #endif // V8_TARGET_ARCH_ARM |
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