C++ (Cpp) fmpr_neg_inf Examples

Example #1

File: mul_fmpz.c Project: isuruf/arb

slong
fmpr_mul_fmpz(fmpr_t z, const fmpr_t x, const fmpz_t y, slong prec, fmpr_rnd_t rnd)
{
    fmpz xv, yv;
    fmpz yexp;

    if (fmpr_is_special(x) || fmpz_is_zero(y))
    {
        if (fmpr_is_zero(x))
        {
            fmpr_zero(z);
        }
        else if (fmpz_is_zero(y) && fmpr_is_finite(x))
        {
            fmpr_zero(z);
        }
        else if (fmpr_is_inf(x) && !fmpz_is_zero(y))
        {
            if (fmpr_sgn(x) == fmpz_sgn(y))
                fmpr_pos_inf(z);
            else
                fmpr_neg_inf(z);
        }
        else
        {
            fmpr_nan(z);
        }

        return FMPR_RESULT_EXACT;
    }

    xv = *fmpr_manref(x);
    yv = *y;

    if (!COEFF_IS_MPZ(xv) && !COEFF_IS_MPZ(yv))
    {
        mp_limb_t ytmp;
        unsigned int bc;
        ytmp = FLINT_ABS(yv);
        count_trailing_zeros(bc, ytmp);
        ytmp >>= bc;
        yexp = bc;

        return _fmpr_mul_1x1(z, FLINT_ABS(xv), fmpr_expref(x),
            ytmp, &yexp, (xv ^ yv) < 0, prec, rnd);
    }

Example #2

static void
_fmpr_div_special(fmpr_t z, const fmpr_t x, const fmpr_t y)
{
    if ((fmpr_is_zero(x) && !fmpr_is_zero(y) && !fmpr_is_nan(y)) ||
        (fmpr_is_inf(y) && !fmpr_is_special(x)))
    {
        fmpr_zero(z);
    }
    else if (fmpr_is_zero(y) || (fmpr_is_special(x) && fmpr_is_special(y)) ||
        fmpr_is_nan(x) || fmpr_is_nan(y))
    {
        fmpr_nan(z);
    }
    else if (fmpr_sgn(x) == fmpr_sgn(y))
        fmpr_pos_inf(z);
    else
        fmpr_neg_inf(z);
}

Example #3

File: get_fmpr.c Project: bluescarni/arb

void
arf_get_fmpr(fmpr_t y, const arf_t x)
{
    if (arf_is_special(x))
    {
        if (arf_is_zero(x))
            fmpr_zero(y);
        else if (arf_is_pos_inf(x))
            fmpr_pos_inf(y);
        else if (arf_is_neg_inf(x))
            fmpr_neg_inf(y);
        else
            fmpr_nan(y);
    }
    else
    {
        arf_get_fmpz_2exp(fmpr_manref(y), fmpr_expref(y), x);
    }
}

Example #4

File: randtest.c Project: isuruf/arb

void
fmpr_randtest_special(fmpr_t x, flint_rand_t state, slong bits, slong mag_bits)
{
    switch (n_randint(state, 32))
    {
        case 0:
            fmpr_zero(x);
            break;
        case 1:
            fmpr_pos_inf(x);
            break;
        case 2:
            fmpr_neg_inf(x);
            break;
        case 3:
            fmpr_nan(x);
            break;
        default:
            fmpr_randtest_not_zero(x, state, bits, mag_bits);
    }
}