================
@@ -3128,6 +3128,38 @@ static bool interp__builtin_ia32_vpconflict(InterpState
&S, CodePtr OpPC,
return true;
}
+static bool interp__builtin_x86_byteshift(
+ InterpState &S, CodePtr OpPC, const CallExpr *Call, unsigned ID,
+ llvm::function_ref<APInt(const Pointer &, PrimType ElemT, unsigned Lane,
+ unsigned I, unsigned Shift)>
+ Fn) {
+ assert(Call->getNumArgs() == 2);
+
+ APSInt ImmAPS = popToAPSInt(S, Call->getArg(1));
+ uint64_t Shift = ImmAPS.getZExtValue();
----------------
RKSimon wrote:
Consult EmitX86BuiltinExpr - we only the bottom imm8
```suggestion
uint64_t Shift = ImmAPS.getZExtValue() & 0xff;
```
https://github.com/llvm/llvm-project/pull/164166
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