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Fix immediate byte and word fetches.

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This commit is contained in:
Thomas Harte
2022-05-02 20:17:44 -04:00
parent fc9a35dd04
commit 25ab478461
1 changed files with 11 additions and 2 deletions
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13
InstructionSets/M68k/Implementation/ExecutorImplementation.hpp
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@@ -111,8 +111,17 @@ typename Executor<model, BusHandler>::EffectiveAddress Executor<model, BusHandle
ea.requires_fetch = false; ea.requires_fetch = false;
break; break;
case AddressingMode::ImmediateData: case AddressingMode::ImmediateData:
read(instruction.size(), program_counter_.l, ea.value); switch(instruction.size()) {
program_counter_.l += (instruction.size() == DataSize::LongWord) ? 4 : 2; case DataSize::Byte:
ea.value.l = read_pc<uint16_t>() & 0xff;
break;
case DataSize::Word:
ea.value.l = read_pc<uint16_t>();
break;
case DataSize::LongWord:
ea.value.l = read_pc<uint32_t>();
break;
}
ea.requires_fetch = false; ea.requires_fetch = false;
break; break;