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Annotation of OpenXM_contrib/gmp/mpfr/rnd_mode.c, Revision 1.1.1.1

1.1       ohara       1: /* mpfr_set_machine_rnd_mode -- set the rounding mode for machine floats
                      2:
                      3: Copyright 1999, 2001, 2002 Free Software Foundation, Inc.
                      4:
                      5: This file is part of the MPFR Library.
                      6:
                      7: The MPFR Library is free software; you can redistribute it and/or modify
                      8: it under the terms of the GNU Lesser General Public License as published by
                      9: the Free Software Foundation; either version 2.1 of the License, or (at your
                     10: option) any later version.
                     11:
                     12: The MPFR Library is distributed in the hope that it will be useful, but
                     13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     14: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
                     15: License for more details.
                     16:
                     17: You should have received a copy of the GNU Lesser General Public License
                     18: along with the MPFR Library; see the file COPYING.LIB.  If not, write to
                     19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
                     20: MA 02111-1307, USA. */
                     21:
                     22: #include <stdio.h>
                     23: #include <stdlib.h>
                     24: #include "gmp.h"
                     25: #include "gmp-impl.h"
                     26: #include "mpfr.h"
                     27:
                     28: #ifdef MPFR_HAVE_FESETROUND
                     29: #include <fenv.h>
                     30:
                     31: /* sets the machine rounding mode to the value rnd_mode */
                     32: void
                     33: mpfr_set_machine_rnd_mode (mp_rnd_t rnd_mode)
                     34: {
                     35:   switch (rnd_mode) {
                     36:   case GMP_RNDN: fesetround(FE_TONEAREST); break;
                     37:   case GMP_RNDZ: fesetround(FE_TOWARDZERO); break;
                     38:   case GMP_RNDU: fesetround(FE_UPWARD); break;
                     39:   case GMP_RNDD: fesetround(FE_DOWNWARD); break;
                     40:   default: fprintf(stderr, "invalid rounding mode\n"); exit(1);
                     41:   }
                     42: }
                     43: #endif