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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_MIPS64 | 5 #if V8_TARGET_ARCH_MIPS64 |
| 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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| 834 // condition code uses at the patched jump. | 834 // condition code uses at the patched jump. |
| 835 int delta = Assembler::GetImmediate16(instr); | 835 int delta = Assembler::GetImmediate16(instr); |
| 836 delta += Assembler::GetRs(instr) * kImm16Mask; | 836 delta += Assembler::GetRs(instr) * kImm16Mask; |
| 837 // If the delta is 0 the instruction is andi at, zero_reg, #0 which also | 837 // If the delta is 0 the instruction is andi at, zero_reg, #0 which also |
| 838 // signals that nothing was inlined. | 838 // signals that nothing was inlined. |
| 839 if (delta == 0) { | 839 if (delta == 0) { |
| 840 return; | 840 return; |
| 841 } | 841 } |
| 842 | 842 |
| 843 if (FLAG_trace_ic) { | 843 if (FLAG_trace_ic) { |
| 844 PrintF("[ patching ic at %p, andi=%p, delta=%d\n", address, | 844 PrintF("[ patching ic at %p, andi=%p, delta=%d\n", |
| 845 andi_instruction_address, delta); | 845 static_cast<void*>(address), |
| 846 static_cast<void*>(andi_instruction_address), delta); |
| 846 } | 847 } |
| 847 | 848 |
| 848 Address patch_address = | 849 Address patch_address = |
| 849 andi_instruction_address - delta * Instruction::kInstrSize; | 850 andi_instruction_address - delta * Instruction::kInstrSize; |
| 850 Instr instr_at_patch = Assembler::instr_at(patch_address); | 851 Instr instr_at_patch = Assembler::instr_at(patch_address); |
| 851 // This is patching a conditional "jump if not smi/jump if smi" site. | 852 // This is patching a conditional "jump if not smi/jump if smi" site. |
| 852 // Enabling by changing from | 853 // Enabling by changing from |
| 853 // andi at, rx, 0 | 854 // andi at, rx, 0 |
| 854 // Branch <target>, eq, at, Operand(zero_reg) | 855 // Branch <target>, eq, at, Operand(zero_reg) |
| 855 // to: | 856 // to: |
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| 903 break; | 904 break; |
| 904 default: | 905 default: |
| 905 UNIMPLEMENTED(); | 906 UNIMPLEMENTED(); |
| 906 } | 907 } |
| 907 patcher.ChangeBranchCondition(branch_instr, opcode); | 908 patcher.ChangeBranchCondition(branch_instr, opcode); |
| 908 } | 909 } |
| 909 } // namespace internal | 910 } // namespace internal |
| 910 } // namespace v8 | 911 } // namespace v8 |
| 911 | 912 |
| 912 #endif // V8_TARGET_ARCH_MIPS64 | 913 #endif // V8_TARGET_ARCH_MIPS64 |
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