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Decode page E.

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This commit is contained in:
Thomas Harte 2022-04-12 09:04:40 -04:00
parent 174b48a14a
commit cd465dd121
1 changed files with 57 additions and 1 deletions
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58
InstructionSets/68k/Decoder.cpp
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@ -499,7 +499,63 @@ Preinstruction Predecoder::decodeD(uint16_t instruction) {
}
Preinstruction Predecoder::decodeE(uint16_t instruction) {
(void)instruction;
switch(instruction & 0x1d8) {
// 4-22 (p126)
case 0x000: return decode<Operation::ASRb>(instruction);
case 0x040: return decode<Operation::ASRw>(instruction);
case 0x080: return decode<Operation::ASRl>(instruction);
// 4-113 (p217)
case 0x008: return decode<Operation::LSRb>(instruction);
case 0x048: return decode<Operation::LSRw>(instruction);
case 0x088: return decode<Operation::LSRl>(instruction);
// 4-163 (p267)
case 0x010: return decode<Operation::ROXRb>(instruction);
case 0x050: return decode<Operation::ROXRw>(instruction);
case 0x090: return decode<Operation::ROXRl>(instruction);
// 4-160 (p264)
case 0x018: return decode<Operation::RORb>(instruction);
case 0x058: return decode<Operation::RORw>(instruction);
case 0x098: return decode<Operation::RORl>(instruction);
// 4-22 (p126)
case 0x100: return decode<Operation::ASLb>(instruction);
case 0x140: return decode<Operation::ASLw>(instruction);
case 0x180: return decode<Operation::ASLl>(instruction);
// 4-113 (p217)
case 0x108: return decode<Operation::LSLb>(instruction);
case 0x148: return decode<Operation::LSLw>(instruction);
case 0x188: return decode<Operation::LSLl>(instruction);
// 4-163 (p267)
case 0x110: return decode<Operation::ROXLb>(instruction);
case 0x150: return decode<Operation::ROXLw>(instruction);
case 0x190: return decode<Operation::ROXLl>(instruction);
// 4-160 (p264)
case 0x118: return decode<Operation::ROLb>(instruction);
case 0x158: return decode<Operation::ROLw>(instruction);
case 0x198: return decode<Operation::ROLl>(instruction);
default: break;
}
switch(instruction & 0xfc0) {
case 0x0c0: return decode<Operation::ASRm>(instruction); // 4-22 (p126)
case 0x1c0: return decode<Operation::ASLm>(instruction); // 4-22 (p126)
case 0x2c0: return decode<Operation::LSRm>(instruction); // 4-113 (p217)
case 0x3c0: return decode<Operation::LSLm>(instruction); // 4-113 (p217)
case 0x4c0: return decode<Operation::ROXRm>(instruction); // 4-163 (p267)
case 0x5c0: return decode<Operation::ROXLm>(instruction); // 4-163 (p267)
case 0x6c0: return decode<Operation::RORm>(instruction); // 4-160 (p264)
case 0x7c0: return decode<Operation::ROLm>(instruction); // 4-160 (p264)
default: break;
}
return Preinstruction();
}