mad_hi

Returns mul_hi(a, b) + c.

template <typename I, detail::enable_if_t<(detail::builtin::is_geninteger<I>::value), int> >
I mad_hi(I a, I b, I c)

1. Returns `mul_hi(a, b) + c`.
   Parameters:
   • I a
   • I b
   • I c