2018-03-19 15:46:45 -05:00
|
|
|
/* mpfr_set_machine_rnd_mode -- set the rounding mode for machine floats
|
|
|
|
|
|
2018-07-03 21:58:21 +02:00
|
|
|
Copyright 1999, 2001-2002, 2006-2018 Free Software Foundation, Inc.
|
|
|
|
|
Contributed by the AriC and Caramba projects, INRIA.
|
2018-03-19 15:46:45 -05:00
|
|
|
|
|
|
|
|
This file is part of the GNU MPFR Library.
|
|
|
|
|
|
|
|
|
|
The GNU 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 3 of the License, or (at your
|
|
|
|
|
option) any later version.
|
|
|
|
|
|
|
|
|
|
The GNU 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 GNU MPFR Library; see the file COPYING.LESSER. If not, see
|
|
|
|
|
http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
|
|
|
|
|
51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
|
|
|
|
|
|
|
|
|
|
#include "mpfr-test.h"
|
|
|
|
|
|
|
|
|
|
/* It is important to test each FE_* macro -- see the ISO C99 standard.
|
|
|
|
|
For instance, with some ARM implementations, only FE_TONEAREST may
|
|
|
|
|
be defined. */
|
|
|
|
|
|
|
|
|
|
/* sets the machine rounding mode to the value rnd_mode */
|
|
|
|
|
int
|
|
|
|
|
mpfr_set_machine_rnd_mode (mpfr_rnd_t rnd_mode)
|
|
|
|
|
{
|
|
|
|
|
switch (rnd_mode)
|
|
|
|
|
{
|
|
|
|
|
case MPFR_RNDN:
|
|
|
|
|
return
|
|
|
|
|
#if defined (MPFR_HAVE_FESETROUND) && defined (FE_TONEAREST)
|
|
|
|
|
fesetround(FE_TONEAREST)
|
|
|
|
|
#else
|
|
|
|
|
-1
|
|
|
|
|
#endif
|
|
|
|
|
;
|
|
|
|
|
case MPFR_RNDZ:
|
|
|
|
|
return
|
|
|
|
|
#if defined (MPFR_HAVE_FESETROUND) && defined (FE_TOWARDZERO)
|
|
|
|
|
fesetround(FE_TOWARDZERO)
|
|
|
|
|
#else
|
|
|
|
|
-1
|
|
|
|
|
#endif
|
|
|
|
|
;
|
|
|
|
|
case MPFR_RNDU:
|
|
|
|
|
return
|
|
|
|
|
#if defined (MPFR_HAVE_FESETROUND) && defined (FE_UPWARD)
|
|
|
|
|
fesetround(FE_UPWARD)
|
|
|
|
|
#else
|
|
|
|
|
-1
|
|
|
|
|
#endif
|
|
|
|
|
;
|
|
|
|
|
case MPFR_RNDD:
|
|
|
|
|
return
|
|
|
|
|
#if defined (MPFR_HAVE_FESETROUND) && defined (FE_DOWNWARD)
|
|
|
|
|
fesetround(FE_DOWNWARD)
|
|
|
|
|
#else
|
|
|
|
|
-1
|
|
|
|
|
#endif
|
|
|
|
|
;
|
|
|
|
|
default:
|
|
|
|
|
return -1;
|
|
|
|
|
}
|
|
|
|
|
}
|
