Function _nfloat_complex_mul_naive 

pub unsafe extern "C" fn _nfloat_complex_mul_naive(
    res1: nfloat_ptr,
    res2: nfloat_ptr,
    a: nfloat_srcptr,
    b: nfloat_srcptr,
    c: nfloat_srcptr,
    d: nfloat_srcptr,
    ctx: *mut gr_ctx_struct,
) -> c_int