================
@@ -4189,6 +4189,56 @@ static bool interp__builtin_ia32_gfni_mul(InterpState
&S, CodePtr OpPC,
return true;
}
+static bool interp__builtin_ia32_vpdp(InterpState &S, CodePtr OpPC,
+ const CallExpr *Call,
+ bool IsSaturating) {
+ const auto *SrcVecT = Call->getArg(0)->getType()->castAs<VectorType>();
+ const auto *OpAVecT = Call->getArg(1)->getType()->castAs<VectorType>();
+ const auto *OpBVecT = Call->getArg(2)->getType()->castAs<VectorType>();
+
+ assert(OpAVecT->getNumElements() == OpBVecT->getNumElements());
+
+ unsigned NumSrcElts = SrcVecT->getNumElements();
+ unsigned NumOperandElts = OpAVecT->getNumElements();
+ unsigned EltsPerLane = NumOperandElts / NumSrcElts;
+
+ PrimType SrcElemT = *S.getContext().classify(SrcVecT->getElementType());
+ PrimType OpAElemT = *S.getContext().classify(OpAVecT->getElementType());
+ PrimType OpBElemT = *S.getContext().classify(OpBVecT->getElementType());
+
+ const Pointer &OpBPtr = S.Stk.pop<Pointer>();
+ const Pointer &OpAPtr = S.Stk.pop<Pointer>();
+ const Pointer &SrcPtr = S.Stk.pop<Pointer>();
+ const Pointer &Dst = S.Stk.peek<Pointer>();
+
+ for (unsigned I = 0; I != NumSrcElts; ++I) {
+ APSInt Acc;
+ INT_TYPE_SWITCH_NO_BOOL(SrcElemT, { Acc = SrcPtr.elem<T>(I).toAPSInt(); });
+ Acc = Acc.sext(64);
+ for (unsigned J = 0; J != EltsPerLane; ++J) {
+ APSInt OpA, OpB;
+ INT_TYPE_SWITCH_NO_BOOL(OpAElemT, {
+ OpA = OpAPtr.elem<T>(EltsPerLane * I + J).toAPSInt();
+ });
+ INT_TYPE_SWITCH_NO_BOOL(OpBElemT, {
+ OpB = OpBPtr.elem<T>(EltsPerLane * I + J).toAPSInt();
+ });
+ OpA = APSInt(OpA.extend(64), false);
+ OpB = APSInt(OpB.extend(64), false);
+ Acc += OpA * OpB;
+ }
+ if (IsSaturating) {
+ Acc = APSInt(Acc.truncSSat(32), false);
+ } else {
+ Acc = APSInt(Acc.trunc(32), false);
+ }
----------------
AkashDeoNU wrote:
Yes! The clarification about the `Src` / `Dst` type difference helps. They are
not allowed to be different types. So I now check that they are the same type,
and I am properly casting `Dst`.
https://github.com/llvm/llvm-project/pull/190549
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