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nv50/ir: handle S8/S16 integers converting to S64

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We can't convert directly from signed integers smaller 64 bit to signed
64 bit integers. For 32 bit integers this is handled with SHR and MERGE.
In order to also support 8/16 bit singed integers convert them to 32 bit
first.

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 2022-08-17 14:37:57 +02:00
parent 2aaa315eee
commit caba679e56
1 changed files with 25 additions and 5 deletions
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30
src/nouveau/codegen/nv50_ir_lowering_helper.cpp
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@ -129,12 +129,32 @@ LoweringHelper::handleCVT(Instruction *insn)
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));
/* We can't convert to signed 64 bit integrers, hence shift the upper word
* and merge. For sources smaller than 32 bit, convert to 32 bit first.
*/
if (dTy == TYPE_S64 && isSignedIntType(sTy) && typeSizeof(sTy) <= 4) {
Value *tmpExtbf;
Value *tmpShr = bld.getSSA();
if (typeSizeof(sTy) < 4) {
unsigned int interval = typeSizeof(sTy) == 1 ? 0x800 : 0x1000;
tmpExtbf = bld.getSSA();
bld.mkOp2(OP_EXTBF, TYPE_S32, tmpExtbf, insn->getSrc(0),
bld.loadImm(bld.getSSA(), interval));
insn->setSrc(0, tmpExtbf);
} else {
tmpExtbf = insn->getSrc(0);
}
bld.mkOp2(OP_SHR, TYPE_S32, tmpShr, tmpExtbf, bld.loadImm(bld.getSSA(), 31));
insn->op = OP_MERGE;
insn->setSrc(1, tmp);
} else if (dTy == TYPE_U64 && sTy == TYPE_U32) {
insn->setSrc(1, tmpShr);
return true;
}
if (dTy == TYPE_U64 && sTy == TYPE_U32) {
insn->op = OP_MERGE;
insn->setSrc(1, bld.loadImm(bld.getSSA(), 0));
}