C++ (Cpp) fmpr_set_ui Examples

Example #1

File: submul.c Project: argriffing/arb

slong
fmpr_submul_ui(fmpr_t z, const fmpr_t x, ulong y, slong prec, fmpr_rnd_t rnd)
{
    fmpr_t t; slong r;
    fmpr_init(t);
    fmpr_set_ui(t, y);
    r = fmpr_submul(z, x, t, prec, rnd);
    fmpr_clear(t);
    return r;
}

Example #2

slong
fmpr_ui_div(fmpr_t z, ulong x, const fmpr_t y, slong prec, fmpr_rnd_t rnd)
{
    fmpr_t t; slong r;
    fmpr_init(t);
    fmpr_set_ui(t, x);
    r = fmpr_div(z, t, y, prec, rnd);
    fmpr_clear(t);
    return r;
}

Example #3

File: t-set_ui.c Project: argriffing/arb

int main()
{
    slong iter;
    flint_rand_t state;

    flint_printf("set_ui....");
    fflush(stdout);

    flint_randinit(state);

    for (iter = 0; iter < 100000 * arb_test_multiplier(); iter++)
    {
        fmpr_t a, b, c;
        mag_t m;
        ulong x;

        fmpr_init(a);
        fmpr_init(b);
        fmpr_init(c);
        mag_init(m);

        x = n_randtest(state);

        fmpr_set_ui(a, x);
        mag_set_ui(m, x);

        mag_get_fmpr(b, m);

        fmpr_set(c, a);
        fmpr_mul_ui(c, c, 1025, MAG_BITS, FMPR_RND_UP);
        fmpr_mul_2exp_si(c, c, -10);

        MAG_CHECK_BITS(m)

        if (!(fmpr_cmpabs(a, b) <= 0 && fmpr_cmpabs(b, c) <= 0))
        {
            flint_printf("FAIL\n\n");
            flint_printf("x = %wu\n\n", x);
            flint_printf("a = "); fmpr_print(a); flint_printf("\n\n");
            flint_printf("b = "); fmpr_print(b); flint_printf("\n\n");
            flint_printf("c = "); fmpr_print(c); flint_printf("\n\n");
            abort();
        }

        fmpr_clear(a);
        fmpr_clear(b);
        fmpr_clear(c);
        mag_clear(m);
    }

    flint_randclear(state);
    flint_cleanup();
    flint_printf("PASS\n");
    return EXIT_SUCCESS;
}

Example #4

File: pow_sloppy.c Project: bluescarni/arb

void
fmpr_pow_sloppy_fmpz(fmpr_t y, const fmpr_t b, const fmpz_t e,
    long prec, fmpr_rnd_t rnd)
{
    long i, wp, bits;

    if (fmpz_is_zero(e))
    {
        fmpr_set_ui(y, 1UL);
        return;
    }

    if (fmpz_sgn(e) < 0)
    {
        fmpz_t f;
        fmpz_init(f);
        fmpz_neg(f, e);
        fmpr_pow_sloppy_fmpz(y, b, f, prec + 2,
            (rnd == FMPR_RND_FLOOR || rnd == FMPR_RND_DOWN)
            ? FMPR_RND_UP : FMPR_RND_DOWN);
        fmpr_ui_div(y, 1UL, y, prec, rnd);
        fmpz_clear(f);
    }

    if (y == b)
    {
        fmpr_t t;
        fmpr_init(t);
        fmpr_set(t, b);
        fmpr_pow_sloppy_fmpz(y, t, e, prec, rnd);
        fmpr_clear(t);
        return;
    }

    fmpr_set(y, b);

    bits = fmpz_bits(e);
    wp = FMPR_PREC_ADD(prec, bits);

    for (i = bits - 2; i >= 0; i--)
    {
        fmpr_mul(y, y, y, wp, rnd);
        if (fmpz_tstbit(e, i))
            fmpr_mul(y, y, b, wp, rnd);
    }
}