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/* mpfr_min -- min and max of x, y
Copyright 2001 Free Software Foundation, Inc.
This file is part of the MPFR Library.
The MPFR Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version.
The MPFR Library 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the MPFR Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
#include "gmp.h"
#include "gmp-impl.h"
#include "mpfr.h"
#include "mpfr-impl.h"
/* The computation of z=min(x,y)
z=x if x <= y
z=y if x > y
*/
int
mpfr_min (mpfr_ptr z, mpfr_srcptr x, mpfr_srcptr y, mp_rnd_t rnd_mode)
{
if (MPFR_IS_NAN(x) && MPFR_IS_NAN(y) )
{
MPFR_SET_NAN(z);
MPFR_RET_NAN;
}
MPFR_CLEAR_NAN(z);
if (MPFR_IS_NAN(x))
return mpfr_set(z, y, rnd_mode);
if (MPFR_IS_NAN(y))
return mpfr_set(z, x, rnd_mode);
if (MPFR_IS_FP(x) && MPFR_IS_ZERO(x) && MPFR_IS_FP(y) && MPFR_IS_ZERO(y))
{
if (MPFR_SIGN(x) < 0)
return mpfr_set(z, x, rnd_mode);
else
return mpfr_set(z, y, rnd_mode);
}
if (mpfr_cmp(x,y) <= 0)
return mpfr_set(z, x, rnd_mode);
else
return mpfr_set(z, y, rnd_mode);
}
/* The computation of z=max(x,y)
z=x if x >= y
z=y if x < y
*/
int
mpfr_max (mpfr_ptr z, mpfr_srcptr x, mpfr_srcptr y, mp_rnd_t rnd_mode)
{
if (MPFR_IS_NAN(x) && MPFR_IS_NAN(y) )
{
MPFR_SET_NAN(z);
MPFR_RET_NAN;
}
MPFR_CLEAR_NAN(z);
if (MPFR_IS_NAN(x))
return mpfr_set(z, y, rnd_mode);
if (MPFR_IS_NAN(y))
return mpfr_set(z, x, rnd_mode);
if (MPFR_IS_FP(x) && MPFR_IS_ZERO(x) && MPFR_IS_FP(y) && MPFR_IS_ZERO(y))
{
if (MPFR_SIGN(x) < 0)
return mpfr_set(z, y, rnd_mode);
else
return mpfr_set(z, x, rnd_mode);
}
if (mpfr_cmp(x,y) <= 0)
return mpfr_set(z, y, rnd_mode);
else
return mpfr_set(z, x, rnd_mode);
}
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