================
@@ -3279,6 +3279,65 @@ static bool interp__builtin_ia32_vpconflict(InterpState
&S, CodePtr OpPC,
return true;
}
+static bool interp__builtin_ia32_shuffle_generic(
+ InterpState &S, CodePtr OpPC, const CallExpr *Call,
+ llvm::function_ref<std::pair<unsigned, unsigned>(unsigned, unsigned,
+ unsigned)>
+ GetSourceIndex,
+ bool IsSingleSrc) {
+
+ assert(Call->getNumArgs() == (IsSingleSrc ? 2 : 3));
+ QualType MaskType = Call->getArg(IsSingleSrc ? 1 : 2)->getType();
+ bool IsMaskVector = MaskType->isVectorType();
+
+ unsigned ShuffleMask = 0;
+ Pointer MaskPtr;
+ if (IsMaskVector) {
+ MaskPtr = S.Stk.pop<Pointer>();
+ } else {
+ ShuffleMask =
+ popToAPSInt(S, Call->getArg(IsSingleSrc ? 1 : 2)).getZExtValue();
+ }
+
+ QualType Arg0Type = Call->getArg(0)->getType();
+ const auto *VecT = Arg0Type->castAs<VectorType>();
+ PrimType ElemT = *S.getContext().classify(VecT->getElementType());
+ unsigned NumElems = VecT->getNumElements();
+ unsigned ElemWidth = S.getContext().getBitWidth(VecT->getElementType());
+
+ Pointer Aptr;
+ Pointer Bptr;
+ if (IsSingleSrc) {
+ Aptr = S.Stk.pop<Pointer>();
+ Bptr = Aptr;
+ } else {
+ Bptr = S.Stk.pop<Pointer>();
+ Aptr = S.Stk.pop<Pointer>();
+ }
+
+ const Pointer &A = Aptr;
+ const Pointer &B = Bptr;
+ const Pointer &Dst = S.Stk.peek<Pointer>();
+
+ for (unsigned DstIdx = 0; DstIdx != NumElems; ++DstIdx) {
+ if (IsMaskVector) {
----------------
RKSimon wrote:
drop this mask handling until its actually used in a future PR - simple first
implementation that we can build on when we need to
https://github.com/llvm/llvm-project/pull/164078
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