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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_X87 | 5 #if V8_TARGET_ARCH_X87 |
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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829 if (*test_instruction_address != Assembler::kTestAlByte) { | 829 if (*test_instruction_address != Assembler::kTestAlByte) { |
830 DCHECK(*test_instruction_address == Assembler::kNopByte); | 830 DCHECK(*test_instruction_address == Assembler::kNopByte); |
831 return; | 831 return; |
832 } | 832 } |
833 | 833 |
834 Address delta_address = test_instruction_address + 1; | 834 Address delta_address = test_instruction_address + 1; |
835 // The delta to the start of the map check instruction and the | 835 // The delta to the start of the map check instruction and the |
836 // condition code uses at the patched jump. | 836 // condition code uses at the patched jump. |
837 uint8_t delta = *reinterpret_cast<uint8_t*>(delta_address); | 837 uint8_t delta = *reinterpret_cast<uint8_t*>(delta_address); |
838 if (FLAG_trace_ic) { | 838 if (FLAG_trace_ic) { |
839 PrintF("[ patching ic at %p, test=%p, delta=%d\n", address, | 839 PrintF("[ patching ic at %p, test=%p, delta=%d\n", |
840 test_instruction_address, delta); | 840 static_cast<void*>(address), |
| 841 static_cast<void*>(test_instruction_address), delta); |
841 } | 842 } |
842 | 843 |
843 // Patch with a short conditional jump. Enabling means switching from a short | 844 // Patch with a short conditional jump. Enabling means switching from a short |
844 // jump-if-carry/not-carry to jump-if-zero/not-zero, whereas disabling is the | 845 // jump-if-carry/not-carry to jump-if-zero/not-zero, whereas disabling is the |
845 // reverse operation of that. | 846 // reverse operation of that. |
846 Address jmp_address = test_instruction_address - delta; | 847 Address jmp_address = test_instruction_address - delta; |
847 DCHECK((check == ENABLE_INLINED_SMI_CHECK) | 848 DCHECK((check == ENABLE_INLINED_SMI_CHECK) |
848 ? (*jmp_address == Assembler::kJncShortOpcode || | 849 ? (*jmp_address == Assembler::kJncShortOpcode || |
849 *jmp_address == Assembler::kJcShortOpcode) | 850 *jmp_address == Assembler::kJcShortOpcode) |
850 : (*jmp_address == Assembler::kJnzShortOpcode || | 851 : (*jmp_address == Assembler::kJnzShortOpcode || |
851 *jmp_address == Assembler::kJzShortOpcode)); | 852 *jmp_address == Assembler::kJzShortOpcode)); |
852 Condition cc = | 853 Condition cc = |
853 (check == ENABLE_INLINED_SMI_CHECK) | 854 (check == ENABLE_INLINED_SMI_CHECK) |
854 ? (*jmp_address == Assembler::kJncShortOpcode ? not_zero : zero) | 855 ? (*jmp_address == Assembler::kJncShortOpcode ? not_zero : zero) |
855 : (*jmp_address == Assembler::kJnzShortOpcode ? not_carry : carry); | 856 : (*jmp_address == Assembler::kJnzShortOpcode ? not_carry : carry); |
856 *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc); | 857 *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc); |
857 } | 858 } |
858 } // namespace internal | 859 } // namespace internal |
859 } // namespace v8 | 860 } // namespace v8 |
860 | 861 |
861 #endif // V8_TARGET_ARCH_X87 | 862 #endif // V8_TARGET_ARCH_X87 |
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