diff options
Diffstat (limited to 'disasm.cpp')
| -rw-r--r-- | disasm.cpp | 73 |
1 files changed, 72 insertions, 1 deletions
@@ -590,10 +590,81 @@ static void disasm_move_movea( node.size = kInstructionSizeStepBytes + src.Size() + dst.Size(); } +static void disasm_move_from_sr( + DisasmNode& node, uint16_t instr, const DataBuffer &code, const Settings &s) +{ + const char suffix = 'w'; + const auto dst = AddrModeArg::Fetch( + node.offset + kInstructionSizeStepBytes, code, instr, suffix); + switch (dst.mode) { + case AddrMode::kInvalid: + return disasm_verbatim(node, instr, code, s); + case AddrMode::kDn: + break; + case AddrMode::kAn: + return disasm_verbatim(node, instr, code, s); + case AddrMode::kAnAddr: + case AddrMode::kAnAddrIncr: + case AddrMode::kAnAddrDecr: + case AddrMode::kD16AnAddr: + case AddrMode::kD8AnXiAddr: + case AddrMode::kWord: + case AddrMode::kLong: + break; + case AddrMode::kD16PCAddr: + case AddrMode::kD8PCXiAddr: + case AddrMode::kImmediate: + return disasm_verbatim(node, instr, code, s); + } + char dst_str[32]{}; + dst.SNPrint(dst_str, sizeof(dst_str)); + snprintf(node.mnemonic, kMnemonicBufferSize, "move%c", suffix); + snprintf(node.arguments, kArgsBufferSize, "%%sr,%s", dst_str); + node.size = kInstructionSizeStepBytes + dst.Size(); +} + +static void disasm_move_to( + DisasmNode& node, uint16_t instr, const DataBuffer &code, const Settings &s, const char* reg) +{ + const char suffix = 'w'; + const auto src = AddrModeArg::Fetch( + node.offset + kInstructionSizeStepBytes, code, instr, suffix); + switch (src.mode) { + case AddrMode::kInvalid: + return disasm_verbatim(node, instr, code, s); + case AddrMode::kDn: + break; + case AddrMode::kAn: + return disasm_verbatim(node, instr, code, s); + case AddrMode::kAnAddr: + case AddrMode::kAnAddrIncr: + case AddrMode::kAnAddrDecr: + case AddrMode::kD16AnAddr: + case AddrMode::kD8AnXiAddr: + case AddrMode::kWord: + case AddrMode::kLong: + case AddrMode::kD16PCAddr: + case AddrMode::kD8PCXiAddr: + case AddrMode::kImmediate: + break; + } + char src_str[32]{}; + src.SNPrint(src_str, sizeof(src_str)); + snprintf(node.mnemonic, kMnemonicBufferSize, "move%c", suffix); + snprintf(node.arguments, kArgsBufferSize, "%s,%%%s", src_str, reg); + node.size = kInstructionSizeStepBytes + src.Size(); +} + static void chunk_mf000_v4000( DisasmNode& node, uint16_t instr, const DataBuffer &code, const Settings &s) { - if (instr == 0x4e70) { + if ((instr & 0xffc0) == 0x40c0) { + return disasm_move_from_sr(node, instr, code, s); + } else if ((instr & 0xffc0) == 0x44c0) { + return disasm_move_to(node, instr, code, s, "ccr"); + } else if ((instr & 0xffc0) == 0x46c0) { + return disasm_move_to(node, instr, code, s, "sr"); + } else if (instr == 0x4e70) { node.size = kInstructionSizeStepBytes; snprintf(node.mnemonic, kMnemonicBufferSize, "reset"); return; |