mirror of
https://github.com/vale981/arb
synced 2025-03-06 01:41:39 -05:00
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
/*=============================================================================
|
|
|
|
This file is part of ARB.
|
|
|
|
ARB is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
ARB is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with ARB; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
=============================================================================*/
|
|
/******************************************************************************
|
|
|
|
Copyright (C) 2014 Fredrik Johansson
|
|
|
|
******************************************************************************/
|
|
|
|
#include "arf.h"
|
|
|
|
TLS_PREFIX mp_ptr __arf_mul_tmp = NULL;
|
|
TLS_PREFIX slong __arf_mul_alloc = 0;
|
|
|
|
void _arf_mul_tmp_cleanup(void)
|
|
{
|
|
flint_free(__arf_mul_tmp);
|
|
__arf_mul_tmp = NULL;
|
|
__arf_mul_alloc = 0;
|
|
}
|
|
|
|
int
|
|
arf_mul_rnd_any(arf_ptr z, arf_srcptr x, arf_srcptr y,
|
|
slong prec, arf_rnd_t rnd)
|
|
{
|
|
mp_size_t xn, yn;
|
|
slong fix;
|
|
int sgnbit, inexact;
|
|
|
|
xn = ARF_XSIZE(x);
|
|
yn = ARF_XSIZE(y);
|
|
sgnbit = (xn ^ yn) & 1;
|
|
xn >>= 1;
|
|
yn >>= 1;
|
|
|
|
if (yn > xn)
|
|
{
|
|
arf_srcptr __t; mp_size_t __u;
|
|
__t = x; x = y; y = __t;
|
|
__u = xn; xn = yn; yn = __u;
|
|
}
|
|
|
|
/* Either operand is a special value. */
|
|
if (yn == 0)
|
|
{
|
|
arf_mul_special(z, x, y);
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
mp_size_t zn, alloc;
|
|
mp_srcptr xptr, yptr;
|
|
mp_ptr tmp;
|
|
ARF_MUL_TMP_DECL
|
|
|
|
ARF_GET_MPN_READONLY(xptr, xn, x);
|
|
ARF_GET_MPN_READONLY(yptr, yn, y);
|
|
|
|
alloc = zn = xn + yn;
|
|
ARF_MUL_TMP_ALLOC(tmp, alloc)
|
|
|
|
if (yn == 1)
|
|
{
|
|
tmp[zn - 1] = mpn_mul_1(tmp, xptr, xn, yptr[0]);
|
|
}
|
|
else if (xn == yn)
|
|
{
|
|
if (xptr == yptr)
|
|
mpn_sqr(tmp, xptr, xn);
|
|
else
|
|
mpn_mul_n(tmp, xptr, yptr, yn);
|
|
}
|
|
else
|
|
{
|
|
mpn_mul(tmp, xptr, xn, yptr, yn);
|
|
}
|
|
|
|
inexact = _arf_set_round_mpn(z, &fix, tmp, zn, sgnbit, prec, rnd);
|
|
_fmpz_add2_fast(ARF_EXPREF(z), ARF_EXPREF(x), ARF_EXPREF(y), fix);
|
|
ARF_MUL_TMP_FREE(tmp, alloc)
|
|
|
|
return inexact;
|
|
}
|
|
}
|
|
|