================
@@ -3564,6 +3564,28 @@ bool InterpretBuiltin(InterpState &S, CodePtr OpPC,
const CallExpr *Call,
return F;
});
+ case X86::BI__builtin_ia32_vpmadd52luq128:
+ case X86::BI__builtin_ia32_vpmadd52luq256:
+ case X86::BI__builtin_ia32_vpmadd52luq512:
+ return interp__builtin_elementwise_triop(
+ S, OpPC, Call, [](const APSInt &A, const APSInt &B, const APSInt &C) {
+ APSInt result = A * B + C;
+ APSInt mask(APSInt::getAllOnes(52).zext(64), false);
+ APSInt masked_result = result & mask;
+ return APSInt(masked_result, true); // unsigned result
+ });
+ case X86::BI__builtin_ia32_vpmadd52huq128:
+ case X86::BI__builtin_ia32_vpmadd52huq256:
+ case X86::BI__builtin_ia32_vpmadd52huq512:
+ return interp__builtin_elementwise_triop(
+ S, OpPC, Call, [](const APSInt &A, const APSInt &B, const APSInt &C) {
+ APSInt result = A * B + C;
+ APSInt mask(APSInt::getAllOnes(52).zext(64), false);
+ APSInt shifted_result = result >> 52;
----------------
tbaederr wrote:
Some explanation for the magic constants here would be nice I guess.
https://github.com/llvm/llvm-project/pull/161056
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