void fp_init(fp_int *a)
{
#if defined(ALT_ECC_SIZE) || defined(HAVE_WOLF_BIGINT)
    a->size = FP_SIZE;
#endif
#ifdef HAVE_WOLF_BIGINT
    wc_bigint_init(&a->raw);
#endif
    fp_zero(a);
}
void fp_init(fp_int *a)
{
#if defined(ALT_ECC_SIZE) || defined(HAVE_WOLF_BIGINT)
    a->size = FP_SIZE;
#endif
#ifdef HAVE_WOLF_BIGINT
    wc_bigint_init(&a->raw);
#endif
    fp_zero(a);
}