Function nfloat_2_set_4_2exp 

pub unsafe extern "C" fn nfloat_2_set_4_2exp(
    res: nfloat_ptr,
    x3: ulong,
    x2: ulong,
    x1: ulong,
    x0: ulong,
    exp: slong,
    xsgnbit: c_int,
    ctx: *mut gr_ctx_struct,
) -> c_int