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VarAction2: Add helper functions for relational comparison ops

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This commit is contained in:
Jonathan G Rennison
2022-06-08 19:22:00 +01:00
parent 31e96ff5e7
commit 249a20e47a
2 changed files with 26 additions and 6 deletions
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12
src/newgrf.cpp
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@@ -6131,8 +6131,8 @@ static void OptimiseVarAction2Adjust(VarAction2OptimiseState &state, const GrfSp
if (adjust.variable == 0x1A && adjust.shift_num == 0 && group->adjusts.size() >= 2) {
DeterministicSpriteGroupAdjust &prev = group->adjusts[group->adjusts.size() - 2];
if (adjust.and_mask == 1) {
if (prev.operation == DSGA_OP_SLT || prev.operation == DSGA_OP_SGE || prev.operation == DSGA_OP_SLE || prev.operation == DSGA_OP_SGT) {
prev.operation = (DeterministicSpriteGroupAdjustOperation)(prev.operation ^ 1);
if (IsEvalAdjustOperationRelationalComparison(prev.operation)) {
prev.operation = InvertEvalAdjustRelationalComparisonOperation(prev.operation);
group->adjusts.pop_back();
state.inference = VA2AIF_SIGNED_NON_NEGATIVE | VA2AIF_ONE_OR_ZERO;
break;
@@ -6155,8 +6155,8 @@ static void OptimiseVarAction2Adjust(VarAction2OptimiseState &state, const GrfSp
if (prev.operation == DSGA_OP_OR && (prev.type == DSGA_TYPE_EQ || prev.type == DSGA_TYPE_NEQ || (prev.type == DSGA_TYPE_NONE && (prev.adjust_flags & DSGAF_SKIP_ON_LSB_SET))) && group->adjusts.size() >= 3) {
DeterministicSpriteGroupAdjust &prev2 = group->adjusts[group->adjusts.size() - 3];
bool found = false;
if (prev2.operation == DSGA_OP_SLT || prev2.operation == DSGA_OP_SGE || prev2.operation == DSGA_OP_SLE || prev2.operation == DSGA_OP_SGT) {
prev2.operation = (DeterministicSpriteGroupAdjustOperation)(prev2.operation ^ 1);
if (IsEvalAdjustOperationRelationalComparison(prev2.operation)) {
prev2.operation = InvertEvalAdjustRelationalComparisonOperation(prev2.operation);
found = true;
} else if (prev2.operation == DSGA_OP_RST && (prev2.type == DSGA_TYPE_EQ || prev2.type == DSGA_TYPE_NEQ) ) {
prev2.type = (prev2.type == DSGA_TYPE_EQ) ? DSGA_TYPE_NEQ : DSGA_TYPE_EQ;
@@ -6963,8 +6963,8 @@ static std::bitset<256> HandleVarAction2DeadStoreElimination(DeterministicSprite
DeterministicSpriteGroupAdjust &next = group->adjusts[i + 1];
if (next.type == DSGA_TYPE_NONE && next.operation == DSGA_OP_XOR && next.variable == 0x1A && next.shift_num == 0 && next.and_mask == 1) {
/* XOR: boolean invert */
if (prev.operation == DSGA_OP_SLT || prev.operation == DSGA_OP_SGE || prev.operation == DSGA_OP_SLE || prev.operation == DSGA_OP_SGT) {
prev.operation = (DeterministicSpriteGroupAdjustOperation)(prev.operation ^ 1);
if (IsEvalAdjustOperationRelationalComparison(prev.operation)) {
prev.operation = InvertEvalAdjustRelationalComparisonOperation(prev.operation);
erase_adjust(i + 1);
} else 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;