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Decode MOVES.

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This commit is contained in:
Thomas Harte
2022-10-26 13:34:01 -04:00
parent ae2419e283
commit 8ff9f27b91
3 changed files with 29 additions and 3 deletions
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26
InstructionSets/M68k/Decoder.cpp
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@@ -512,6 +512,12 @@ template <typename Predecoder<model>::OpT op> uint32_t Predecoder<model>::invali
return ~OneOperandMask< return ~OneOperandMask<
Ext Ext
>::value; >::value;
case OpT(Operation::MOVESb): case OpT(Operation::MOVESw): case OpT(Operation::MOVESl):
return ~TwoOperandMask<
Ext,
Ind | PostInc | PreDec | d16An | d8AnXn | XXXw | XXXl
>::value;
} }
// //
@@ -1016,6 +1022,17 @@ template <typename Predecoder<model>::OpT op, bool validate> Preinstruction Pred
// //
case OpT(Operation::MOVEfromC): case OpT(Operation::MOVEtoC): case OpT(Operation::MOVEfromC): case OpT(Operation::MOVEtoC):
return validated<op, validate>(AddressingMode::ExtensionWord); return validated<op, validate>(AddressingMode::ExtensionWord);
//
// MARK: MOVES
//
// b0–b2 and b3–b5: effective address;
// also an extension word is present to dictate a a further register and a direction of transfer.
//
case OpT(Operation::MOVESb): case OpT(Operation::MOVESw): case OpT(Operation::MOVESl):
return validated<op, validate>(
AddressingMode::ExtensionWord, 0,
combined_mode(ea_mode, ea_register), ea_register);
} }
// //
@@ -1230,8 +1247,13 @@ Preinstruction Predecoder<model>::decode0(uint16_t instruction) {
// 4-83 (p187) // 4-83 (p187)
case 0x00c: DecodeReq(model >= Model::M68020, Op::CMP2b); case 0x00c: DecodeReq(model >= Model::M68020, Op::CMP2b);
case 0x02c: DecodeReq(model >= Model::M68020, Op::CMP2w); case 0x04c: DecodeReq(model >= Model::M68020, Op::CMP2w);
case 0x04c: DecodeReq(model >= Model::M68020, Op::CMP2l); case 0x08c: DecodeReq(model >= Model::M68020, Op::CMP2l);
// 6-24 (p478)
case 0xe00: DecodeReq(model >= Model::M68010, Op::MOVESb);
case 0xe40: DecodeReq(model >= Model::M68010, Op::MOVESw);
case 0xe80: DecodeReq(model >= Model::M68010, Op::MOVESl);
default: break; default: break;
} }

4
InstructionSets/M68k/Instruction.cpp
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@@ -96,6 +96,10 @@ const char *_to_string(Operation operation, bool is_quick) {
case Operation::MOVEAw: return "MOVEA.w"; case Operation::MOVEAw: return "MOVEA.w";
case Operation::MOVEAl: return "MOVEA.l"; case Operation::MOVEAl: return "MOVEA.l";
case Operation::MOVESb: return "MOVES.b";
case Operation::MOVESw: return "MOVES.w";
case Operation::MOVESl: return "MOVES.l";
case Operation::LEA: return "LEA"; case Operation::LEA: return "LEA";
case Operation::PEA: return "PEA"; case Operation::PEA: return "PEA";

2
InstructionSets/M68k/Instruction.hpp
View File

@@ -111,7 +111,7 @@ enum class Operation: uint8_t {
MOVEfromCCR, MOVEfromCCR,
MOVEtoC, MOVEfromC, MOVEtoC, MOVEfromC,
MOVES, MOVESb, MOVESw, MOVESl,
BKPT, RTD, BKPT, RTD,
// //