handles all for opcode 18
| 697 | |
| 698 | // handles all for opcode 18 |
| 699 | std::string PowerPCDisassembler::Opcode18Handler(const u32 binary, |
| 700 | const u32 current_instruction_address) |
| 701 | { |
| 702 | u32 amt = ValueAtBits(binary, 6, 24) << 2; |
| 703 | u32 aa = ValueAtBits(binary, 30, 1); |
| 704 | u32 lk = ValueAtBits(binary, 31, 1); |
| 705 | bool is_negative = false; |
| 706 | |
| 707 | if (amt >= 0x2000000) |
| 708 | { |
| 709 | is_negative = true; |
| 710 | } |
| 711 | |
| 712 | std::string mnemonic = "b"; |
| 713 | if (lk) |
| 714 | mnemonic += "l"; |
| 715 | if (aa) |
| 716 | mnemonic += "a"; |
| 717 | |
| 718 | if (aa) |
| 719 | { |
| 720 | if (is_negative) |
| 721 | amt += 0xFC000000; |
| 722 | return mnemonic + " ->0x" + TS(amt, 16, 8); |
| 723 | } |
| 724 | else |
| 725 | { |
| 726 | if (current_instruction_address == 0) |
| 727 | { |
| 728 | if (!is_negative) |
| 729 | return mnemonic + " 0x" + TS(amt, 16); |
| 730 | return mnemonic + " -0x" + TS(0x2000000 - (amt - 0x2000000), 16); |
| 731 | } |
| 732 | else |
| 733 | { |
| 734 | if (is_negative) |
| 735 | amt += 0xFC000000; |
| 736 | return mnemonic + " ->0x" + TS(current_instruction_address + amt, 16, 8); |
| 737 | } |
| 738 | } |
| 739 | } |
| 740 | |
| 741 | // handles all for opcode 18 extended opcode 16 and extended opcode 528 |
| 742 | std::string PowerPCDisassembler::Opcode19HandlerExt16(const u32 binary, const std::string& toAdd) |
nothing calls this directly
no outgoing calls
no test coverage detected