nv50/ir: clear dnz flag when converting mul/mad to simpler ops
Fixes some assertion failures in the GM107 emitter with the game 'tansei', noticed while debugging gitlab issue 4101. Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu> Reviewed-by: Karol Herbst <kherbst@redhat.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8534>
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@ -1108,6 +1108,7 @@ ConstantFolding::opnd(Instruction *i, ImmediateValue &imm0, int s)
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}
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} else
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if (imm0.isInteger(0)) {
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i->dnz = 0;
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i->op = OP_MOV;
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i->setSrc(0, new_ImmediateValue(prog, 0u));
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i->src(0).mod = Modifier(0);
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@ -1117,6 +1118,7 @@ ConstantFolding::opnd(Instruction *i, ImmediateValue &imm0, int s)
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if (!i->postFactor && (imm0.isInteger(1) || imm0.isInteger(-1))) {
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if (imm0.isNegative())
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i->src(t).mod = i->src(t).mod ^ Modifier(NV50_IR_MOD_NEG);
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i->dnz = 0;
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i->op = i->src(t).mod.getOp();
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if (s == 0) {
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i->setSrc(0, i->getSrc(1));
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@ -1157,6 +1159,7 @@ ConstantFolding::opnd(Instruction *i, ImmediateValue &imm0, int s)
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i->src(0).mod = i->src(2).mod;
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i->setSrc(1, NULL);
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i->setSrc(2, NULL);
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i->dnz = 0;
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i->op = i->src(0).mod.getOp();
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if (i->op != OP_CVT)
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i->src(0).mod = 0;
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