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/*
Copyright (C) 2014 Fredrik Johansson
This file is part of Arb.
Arb 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 2.1 of the License, or
(at your option) any later version. See <http://www.gnu.org/licenses/>.
*/
#include "mag.h"
void
mag_mul(mag_t z, const mag_t x, const mag_t y)
{
if (mag_is_special(x) || mag_is_special(y))
{
if (mag_is_inf(x) || mag_is_inf(y))
mag_inf(z);
else
mag_zero(z);
}
else
{
slong fix;
MAG_MAN(z) = MAG_FIXMUL(MAG_MAN(x), MAG_MAN(y)) + LIMB_ONE;
fix = !(MAG_MAN(z) >> (MAG_BITS - 1));
MAG_MAN(z) <<= fix;
_fmpz_add2_fast(MAG_EXPREF(z), MAG_EXPREF(x), MAG_EXPREF(y), -fix);
}
}
void
mag_mul_lower(mag_t z, const mag_t x, const mag_t y)
{
if (mag_is_special(x) || mag_is_special(y))
{
if (mag_is_zero(x) || mag_is_zero(y))
mag_zero(z);
else
mag_inf(z);
}
else
{
slong fix;
MAG_MAN(z) = MAG_FIXMUL(MAG_MAN(x), MAG_MAN(y));
fix = !(MAG_MAN(z) >> (MAG_BITS - 1));
MAG_MAN(z) <<= fix;
_fmpz_add2_fast(MAG_EXPREF(z), MAG_EXPREF(x), MAG_EXPREF(y), -fix);
}
}
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