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