================
@@ -2745,6 +2745,73 @@ static bool interp__builtin_ia32_addsub(InterpState &S,
CodePtr OpPC,
return true;
}
+static bool interp__builtin_ia32_pclmulqdq(InterpState &S, CodePtr OpPC,
+ const CallExpr *Call) {
+ // PCLMULQDQ: carry-less multiplication of selected 64-bit halves
+ // imm8 bit 0: selects lower (0) or upper (1) 64 bits of first operand
+ // imm8 bit 4: selects lower (0) or upper (1) 64 bits of second operand
+ assert(Call->getArg(0)->getType()->isVectorType() &&
+ Call->getArg(1)->getType()->isVectorType());
+
+ // Extract imm8 argument
+ APSInt Imm8 = popToAPSInt(S, Call->getArg(2));
+ unsigned Imm8Val = static_cast<unsigned>(Imm8.getZExtValue());
+ bool SelectUpperA = (Imm8Val & 0x01) != 0;
+ bool SelectUpperB = (Imm8Val & 0x10) != 0;
----------------
RKSimon wrote:
Do we need Imm8Val? Doesn't `(Imm8 & 0x01) != 0` work?
https://github.com/llvm/llvm-project/pull/169214
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