Function std::intrinsics::fmaf64

pub unsafe extern "rust-intrinsic" fn fmaf64(a: f64, b: f64, c: f64) -> f64

Unstable (core_intrinsics #0)

: intrinsics are unlikely to ever be stabilized, instead they should be used through stabilized interfaces in the rest of the standard library

Returns a * b + c for f64 values.