pub fn get_gemm_fn() -> unsafe fn(_: usize, _: usize, _: usize, _: *mut Complex<f32>, _: isize, _: isize, _: bool, _: *const Complex<f32>, _: isize, _: isize, _: *const Complex<f32>, _: isize, _: isize, _: Complex<f32>, _: Complex<f32>, _: bool, _: bool, _: bool, _: Parallelism)