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/*
Copyright (C) 2013 Fredrik Johansson
This file is part of FLINT.
FLINT is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#include "arb.h"
void
arb_hypot(arb_t z, const arb_t x, const arb_t y, slong prec)
{
if (arb_is_zero(y))
{
arb_abs(z, x);
}
else if (arb_is_zero(x))
{
arb_abs(z, y);
}
else
{
arb_t t;
arb_init(t);
/* TODO: use arb_fmma */
arb_mul(t, x, x, prec + 4);
arb_mul(z, y, y, prec + 4);
arb_add(t, t, z, prec + 4);
arb_sqrtpos(z, t, prec);
arb_clear(t);
}
}
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