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nv50/ir: split and cvt 64bit integers for {i,u}2{i,u}{8,16}

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We can't convert from a 64 bit integer to any integer smaller than
64 bit directly, hence split the value first and then cvt / mov to the
target type.

Reviewed-by: Karol Herbst <kherbst@redhat.com>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18109>
This commit is contained in:
Danilo Krummrich 2022-08-16 17:30:50 +02:00
parent 8ccba4ea5c
commit 2aaa315eee
1 changed files with 22 additions and 4 deletions
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26
src/nouveau/codegen/nv50_ir_lowering_helper.cpp
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@ -105,13 +105,31 @@ LoweringHelper::handleCVT(Instruction *insn)
bld.setPosition(insn, false);
if ((dTy == TYPE_S32 && sTy == TYPE_S64) ||
(dTy == TYPE_U32 && sTy == TYPE_U64)) {
/* We can't convert from a 64 bit integer to any integer smaller than 64 bit
* directly, hence split the value first and then cvt / mov to the target
* type.
*/
if (isIntType(dTy) && typeSizeof(dTy) <= 4 &&
isIntType(sTy) && typeSizeof(sTy) == 8) {
DataType tmpTy = (isSignedIntType(dTy)) ? TYPE_S32 : TYPE_U32;
Value *src[2];
bld.mkSplit(src, 4, insn->getSrc(0));
insn->op = OP_MOV;
insn->setSrc(0, src[0]);
} else if (dTy == TYPE_S64 && sTy == TYPE_S32) {
/* For a 32 bit integer, we just need to mov the value to it's
* destination. */
if (typeSizeof(dTy) == 4) {
insn->op = OP_MOV;
} else { /* We're smaller than 32 bit, hence convert. */
insn->op = OP_CVT;
insn->setType(dTy, tmpTy);
}
return true;
}
if (dTy == TYPE_S64 && sTy == TYPE_S32) {
Value *tmp = bld.getSSA();
bld.mkOp2(OP_SHR, TYPE_S32, tmp, insn->getSrc(0), bld.loadImm(bld.getSSA(), 31));
insn->op = OP_MERGE;