[libc-commits] [libc] [libc][math] Add MPFR tests for fmul (PR #96413)

[via libc-commits]

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@@ -293,7 +296,10 @@ constexpr bool is_valid_operation() {
       (op == Operation::Fma && internal::IsTernaryInput<InputType>::VALUE &&
        cpp::is_floating_point_v<
            typename internal::MakeScalarInput<InputType>::type> &&
-       cpp::is_floating_point_v<OutputType>);
+       cpp::is_floating_point_v<OutputType>) ||
+      (op == Operation::Fmul &&
+       !internal::AreMatchingBinaryInputAndBinaryOutput<InputType,
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lntue wrote:

it should be similar conditions to the `Operation::Fma` above, with `IsBinaryInput` instead of `IsTernaryInput`.

https://github.com/llvm/llvm-project/pull/96413