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VarAction2: Add adjust types for combined (in)equality with constant

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Jonathan G Rennison
2022-06-03 14:17:15 +01:00
parent 1e52e51ce1
commit 263a87f5da
3 changed files with 25 additions and 1 deletions
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17
src/newgrf.cpp
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@@ -5896,6 +5896,17 @@ static void OptimiseVarAction2Adjust(VarAction2OptimiseState &state, const GrfSp
prev.operation = DSGA_OP_EQ;
group->adjusts.pop_back();
state.inference = VA2AIF_SIGNED_NON_NEGATIVE | VA2AIF_ONE_OR_ZERO;
if (group->adjusts.size() >= 2) {
DeterministicSpriteGroupAdjust &eq_adjust = group->adjusts[group->adjusts.size() - 1];
DeterministicSpriteGroupAdjust &prev_op = group->adjusts[group->adjusts.size() - 2];
if (eq_adjust.type == DSGA_TYPE_NONE && eq_adjust.variable == 0x1A &&
prev_op.type == DSGA_TYPE_NONE && prev_op.operation == DSGA_OP_RST) {
prev_op.type = DSGA_TYPE_EQ;
prev_op.add_val = (0xFFFFFFFF >> eq_adjust.shift_num) & eq_adjust.and_mask;
group->adjusts.pop_back();
state.inference |= VA2AIF_SINGLE_LOAD;
}
}
break;
}
if (prev_inference & VA2AIF_ONE_OR_ZERO) {
@@ -5931,6 +5942,12 @@ static void OptimiseVarAction2Adjust(VarAction2OptimiseState &state, const GrfSp
state.inference = VA2AIF_PREV_TERNARY;
break;
}
if (prev.operation == DSGA_OP_RST && (prev.type == DSGA_TYPE_EQ || prev.type == DSGA_TYPE_NEQ)) {
prev.type = (prev.type == DSGA_TYPE_EQ) ? DSGA_TYPE_NEQ : DSGA_TYPE_EQ;
group->adjusts.pop_back();
state.inference = VA2AIF_SIGNED_NON_NEGATIVE | VA2AIF_ONE_OR_ZERO | VA2AIF_SINGLE_LOAD;
break;
}
}
if (adjust.and_mask <= 1) state.inference = prev_inference & (VA2AIF_SIGNED_NON_NEGATIVE | VA2AIF_ONE_OR_ZERO);
break;