================
@@ -3423,6 +3423,18 @@ bool InterpretBuiltin(InterpState &S, CodePtr OpPC,
const CallExpr *Call,
return LHS.isSigned() ? LHS.ssub_sat(RHS) : LHS.usub_sat(RHS);
});
+ case clang::X86::BI__builtin_ia32_pmulhrsw128:
+ case clang::X86::BI__builtin_ia32_pmulhrsw256:
+ case clang::X86::BI__builtin_ia32_pmulhrsw512:
+ return interp__builtin_elementwise_int_binop(
+ S, OpPC, Call, [](const APSInt &LHS, const APSInt &RHS) {
+ unsigned Width = LHS.getBitWidth();
+ APInt Mul = llvm::APIntOps::mulhs(LHS, RHS);
+ Mul = Mul.relativeLShr(14);
+ Mul = Mul + APInt(Width, 1, true);
+ return Mul.relativeLShr(1);
+ });
----------------
Temperz87 wrote:
I think this diverges from X86InstCombineIntrinsic.cpp where logical shifting
is used instead of arithmetic, as well as extract bits being used in place of
shifting to the right. I understand that this code has the exact same behavior
but I just want to make sure that's alright
Also should this change apply to ExprConstant as well?
https://github.com/llvm/llvm-project/pull/160636
_______________________________________________
cfe-commits mailing list
[email protected]
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
