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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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