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VarAction2: Add a JNZ op analogous to JZ for OR ops

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This commit is contained in:
Jonathan G Rennison
2022-07-30 22:40:41 +01:00
parent 5ec802a3d4
commit cbc6199542
3 changed files with 39 additions and 9 deletions
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20
src/newgrf.cpp
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@@ -6915,7 +6915,13 @@ static void OptimiseVarAction2Adjust(VarAction2OptimiseState &state, const GrfSp
}
if (adjust.and_mask <= 1) state.inference = prev_inference & (VA2AIF_SIGNED_NON_NEGATIVE | VA2AIF_ONE_OR_ZERO);
state.inference |= prev_inference & (VA2AIF_SIGNED_NON_NEGATIVE | VA2AIF_ONE_OR_ZERO) & non_const_var_inference;
if ((non_const_var_inference & VA2AIF_ONE_OR_ZERO) || (adjust.and_mask <= 1)) adjust.adjust_flags |= DSGAF_SKIP_ON_LSB_SET;
if ((non_const_var_inference & VA2AIF_ONE_OR_ZERO) || (adjust.and_mask <= 1)) {
adjust.adjust_flags |= DSGAF_SKIP_ON_LSB_SET;
if (prev_inference & VA2AIF_ONE_OR_ZERO) {
adjust.adjust_flags |= DSGAF_JUMP_INS_HINT;
group->dsg_flags |= DSGF_CHECK_INSERT_JUMP;
}
}
try_merge_with_previous();
break;
case DSGA_OP_XOR:
@@ -7332,7 +7338,7 @@ static bool OptimiseVarAction2DeterministicSpriteGroupExpensiveVarsInner(Determi
bool seen_first = false;
for (int j = end; j >= start; j--) {
DeterministicSpriteGroupAdjust &adjust = group->adjusts[j];
if (seen_first && adjust.operation == DSGA_OP_JZ && condition_depth > 0) {
if (seen_first && IsEvalAdjustJumpOperation(adjust.operation) && condition_depth > 0) {
/* Do not insert the STO_NC inside a conditional block when it is also needed outside the block */
condition_depth--;
insert_pos = j;
@@ -7645,7 +7651,7 @@ static void OptimiseVarAction2DeterministicSpriteGroupInsertJumps(DeterministicS
if (prev.operation == DSGA_OP_STO && (prev.type != DSGA_TYPE_NONE || prev.variable != 0x1A || prev.shift_num != 0 || prev.and_mask >= 0x100)) break;
if (prev.operation == DSGA_OP_STO_NC && prev.divmod_val >= 0x100) break;
if (prev.operation == DSGA_OP_STOP) break;
if (prev.operation == DSGA_OP_JZ) break;
if (IsEvalAdjustJumpOperation(prev.operation)) break;
if (prev.variable == 0x7E) break;
/* Reached a store which can't be skipped over because the value is needed later */
@@ -7676,8 +7682,8 @@ static void OptimiseVarAction2DeterministicSpriteGroupInsertJumps(DeterministicS
current.adjust_flags &= ~DSGAF_END_BLOCK;
current.jump = 0;
}
current.operation = DSGA_OP_JZ;
current.adjust_flags &= ~(DSGAF_JUMP_INS_HINT | DSGAF_SKIP_ON_ZERO);
current.operation = (current.adjust_flags & DSGAF_SKIP_ON_LSB_SET) ? DSGA_OP_JNZ : DSGA_OP_JZ;
current.adjust_flags &= ~(DSGAF_JUMP_INS_HINT | DSGAF_SKIP_ON_ZERO | DSGAF_SKIP_ON_LSB_SET);
mark_end_block(group->adjusts[i - 1], 1);
group->adjusts.erase(group->adjusts.begin() + i);
if (j >= 0 && current.variable == 0x7D && (current.adjust_flags & DSGAF_LAST_VAR_READ)) {
@@ -7706,7 +7712,7 @@ struct ResolveJumpInnerResult {
static ResolveJumpInnerResult OptimiseVarAction2DeterministicSpriteResolveJumpsInner(DeterministicSpriteGroup *group, const uint start)
{
for (uint i = start + 1; i < (uint)group->adjusts.size(); i++) {
if (group->adjusts[i].operation == DSGA_OP_JZ) {
if (IsEvalAdjustJumpOperation(group->adjusts[i].operation)) {
ResolveJumpInnerResult result = OptimiseVarAction2DeterministicSpriteResolveJumpsInner(group, i);
i = result.end_index;
if (result.end_block_remaining > 0) {
@@ -7727,7 +7733,7 @@ static void OptimiseVarAction2DeterministicSpriteResolveJumps(DeterministicSprit
if (HasGrfOptimiserFlag(NGOF_NO_OPT_VARACT2_INSERT_JUMPS)) return;
for (uint i = 0; i < (uint)group->adjusts.size(); i++) {
if (group->adjusts[i].operation == DSGA_OP_JZ) {
if (IsEvalAdjustJumpOperation(group->adjusts[i].operation)) {
ResolveJumpInnerResult result = OptimiseVarAction2DeterministicSpriteResolveJumpsInner(group, i);
i = result.end_index;
assert(result.end_block_remaining == 0);