================
@@ -3128,6 +3128,67 @@ static bool interp__builtin_ia32_vpconflict(InterpState
&S, CodePtr OpPC,
return true;
}
+static bool interp__builtin_x86_pslldq_byteshift(InterpState &S, CodePtr OpPC,
+ const CallExpr *Call,
+ unsigned ID) {
+ assert(Call->getNumArgs() == 2);
+
+ APSInt ImmAPS = popToAPSInt(S, Call->getArg(1));
+ uint64_t Shift = ImmAPS.getZExtValue();
+
+ const Pointer &Src = S.Stk.pop<Pointer>();
+ if (!Src.getFieldDesc()->isPrimitiveArray())
+ return false;
+
+ unsigned NumElems = Src.getNumElems();
+ const Pointer &Dst = S.Stk.peek<Pointer>();
+ PrimType ElemT = Src.getFieldDesc()->getPrimType();
+
+ TYPE_SWITCH(ElemT, {
+ for (unsigned I = 0; I != NumElems; ++I) {
+ if (I < Shift) {
+ Dst.elem<T>(I) = T();
+ } else {
+ Dst.elem<T>(I) = Src.elem<T>(I - Shift);
+ }
+ }
+ });
+
+ Dst.initializeAllElements();
+
+ return true;
+}
+
+static bool interp__builtin_x86_psrldq_byteshift(InterpState &S, CodePtr OpPC,
+ const CallExpr *Call,
+ unsigned ID) {
+ assert(Call->getNumArgs() == 2);
+
+ APSInt ImmAPS = popToAPSInt(S, Call->getArg(1));
+ uint64_t Shift = ImmAPS.getZExtValue();
+
+ const Pointer &Src = S.Stk.pop<Pointer>();
+ if (!Src.getFieldDesc()->isPrimitiveArray())
+ return false;
+
+ unsigned NumElems = Src.getNumElems();
+ const Pointer &Dst = S.Stk.peek<Pointer>();
+ PrimType ElemT = Src.getFieldDesc()->getPrimType();
+
+ TYPE_SWITCH(ElemT, {
+ for (unsigned I = 0; I != NumElems; ++I) {
----------------
RKSimon wrote:
The byte shifts are done PER 128-bit vector lane - see
https://github.com/llvm/llvm-project/blob/737e1162a5904d4f0953d7c55c07e829db59da0c/clang/lib/CodeGen/TargetBuiltins/X86.cpp#L1813-L1838
https://github.com/llvm/llvm-project/pull/164166
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