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Simplifies and fixes post-inc MOVE behaviour.

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This commit is contained in:
Thomas Harte 2019-04-24 13:14:25 -04:00
parent 958d44a20d
commit 0bb6b498ce
1 changed files with 11 additions and 12 deletions
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23
Processors/68000/Implementation/68000Storage.cpp
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@ -2843,20 +2843,19 @@ struct ProcessorStorageConstructor {
// If any post-incrementing was involved, do the post increment(s).
if(ea_mode == PostInc || destination_mode == PostInc) {
if(ea_mode == destination_mode) {
const int ea_inc = inc(ea_mode);
const int destination_inc = inc(destination_mode);
if(ea_inc == destination_inc) {
op(ea_inc | MicroOp::SourceMask | MicroOp::DestinationMask);
} else {
op(ea_inc | MicroOp::SourceMask);
op(destination_inc | MicroOp::DestinationMask);
}
const int ea_inc = inc(ea_register);
const int destination_inc = inc(destination_register);
// If there are two increments, and both can be done simultaneously, do that.
// Otherwise do one or two individually.
if(ea_mode == destination_mode && ea_inc == destination_inc) {
op(ea_inc | MicroOp::SourceMask | MicroOp::DestinationMask);
} else {
if(ea_mode == PostInc) {
op(inc(ea_mode) | MicroOp::SourceMask);
} else {
op(inc(destination_mode) | MicroOp::DestinationMask);
op(ea_inc | MicroOp::SourceMask);
}
if(destination_mode == PostInc) {
op(destination_inc | MicroOp::DestinationMask);
}
}
}