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1 // Copyright 2007-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2007-2008 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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693 case 0xB7: return "movzx_w"; | 693 case 0xB7: return "movzx_w"; |
694 case 0xAF: return "imul"; | 694 case 0xAF: return "imul"; |
695 case 0xA5: return "shld"; | 695 case 0xA5: return "shld"; |
696 case 0xAD: return "shrd"; | 696 case 0xAD: return "shrd"; |
697 case 0xAB: return "bts"; | 697 case 0xAB: return "bts"; |
698 default: return NULL; | 698 default: return NULL; |
699 } | 699 } |
700 } | 700 } |
701 | 701 |
702 | 702 |
703 // Disassembled instruction '*instr' and writes it intro 'out_buffer'. | 703 // Disassembled instruction '*instr' and writes it into 'out_buffer'. |
704 int DisassemblerIA32::InstructionDecode(v8::internal::Vector<char> out_buffer, | 704 int DisassemblerIA32::InstructionDecode(v8::internal::Vector<char> out_buffer, |
705 byte* instr) { | 705 byte* instr) { |
706 tmp_buffer_pos_ = 0; // starting to write as position 0 | 706 tmp_buffer_pos_ = 0; // starting to write as position 0 |
707 byte* data = instr; | 707 byte* data = instr; |
708 // Check for hints. | 708 // Check for hints. |
709 const char* branch_hint = NULL; | 709 const char* branch_hint = NULL; |
710 // We use this two prefixes only with branch prediction | 710 // We use these two prefixes only with branch prediction |
711 if (*data == 0x3E /*ds*/) { | 711 if (*data == 0x3E /*ds*/) { |
712 branch_hint = "predicted taken"; | 712 branch_hint = "predicted taken"; |
713 data++; | 713 data++; |
714 } else if (*data == 0x2E /*cs*/) { | 714 } else if (*data == 0x2E /*cs*/) { |
715 branch_hint = "predicted not taken"; | 715 branch_hint = "predicted not taken"; |
716 data++; | 716 data++; |
717 } | 717 } |
718 bool processed = true; // Will be set to false if the current instruction | 718 bool processed = true; // Will be set to false if the current instruction |
719 // is not in 'instructions' table. | 719 // is not in 'instructions' table. |
720 const InstructionDesc& idesc = instruction_table.Get(*data); | 720 const InstructionDesc& idesc = instruction_table.Get(*data); |
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1130 } | 1130 } |
1131 for (int i = 6 - (pc - prev_pc); i >= 0; i--) { | 1131 for (int i = 6 - (pc - prev_pc); i >= 0; i--) { |
1132 fprintf(f, " "); | 1132 fprintf(f, " "); |
1133 } | 1133 } |
1134 fprintf(f, " %s\n", buffer.start()); | 1134 fprintf(f, " %s\n", buffer.start()); |
1135 } | 1135 } |
1136 } | 1136 } |
1137 | 1137 |
1138 | 1138 |
1139 } // namespace disasm | 1139 } // namespace disasm |
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