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nvc0/ir: optimize set & 1.0 to produce boolean-float sets 

This has started to happen more now that the backend is producing
KILL_IF more often.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de>
This commit is contained in:
Ilia Mirkin 2015-05-03 22:15:16 -04:00
parent e5ad19a46e
commit d2a474e8d4
2 changed files with 29 additions and 0 deletions
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27
src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
View File

@ -973,6 +973,33 @@ ConstantFolding::opnd(Instruction *i, ImmediateValue &imm0, int s)
}
break;
case OP_AND:
{
CmpInstruction *cmp = i->getSrc(t)->getInsn()->asCmp();
if (!cmp || cmp->op == OP_SLCT || cmp->getDef(0)->refCount() > 1)
return;
if (!prog->getTarget()->isOpSupported(cmp->op, TYPE_F32))
return;
if (imm0.reg.data.f32 != 1.0)
return;
if (i->getSrc(t)->getInsn()->dType != TYPE_U32)
return;
i->getSrc(t)->getInsn()->dType = TYPE_F32;
if (i->src(t).mod != Modifier(0)) {
assert(i->src(t).mod == Modifier(NV50_IR_MOD_NOT));
i->src(t).mod = Modifier(0);
cmp->setCond = inverseCondCode(cmp->setCond);
}
i->op = OP_MOV;
i->setSrc(s, NULL);
if (t) {
i->setSrc(0, i->getSrc(t));
i->setSrc(t, NULL);
}
}
break;
case OP_SHL:
{
if (s != 1 || i->src(0).mod != Modifier(0))

2
src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp
View File

@ -416,6 +416,8 @@ TargetNV50::isOpSupported(operation op, DataType ty) const
return false;
case OP_SAD:
return ty == TYPE_S32;
case OP_SET:
return !isFloatType(ty);
default:
return true;
}