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Annotation of OpenXM_contrib/gmp/mpfr/minmax.c, Revision 1.1

1.1     ! ohara       1: /* mpfr_min -- min and max of x, y
        !             2:
        !             3: Copyright 2001 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 "gmp.h"
        !            23: #include "gmp-impl.h"
        !            24: #include "mpfr.h"
        !            25: #include "mpfr-impl.h"
        !            26:
        !            27:  /* The computation of z=min(x,y)
        !            28:
        !            29:     z=x if x <= y
        !            30:     z=y if x > y
        !            31:  */
        !            32:
        !            33: int
        !            34: mpfr_min (mpfr_ptr z, mpfr_srcptr x, mpfr_srcptr y, mp_rnd_t rnd_mode)
        !            35: {
        !            36:   if (MPFR_IS_NAN(x) && MPFR_IS_NAN(y) )
        !            37:     {
        !            38:       MPFR_SET_NAN(z);
        !            39:       MPFR_RET_NAN;
        !            40:     }
        !            41:   MPFR_CLEAR_NAN(z);
        !            42:
        !            43:   if (MPFR_IS_NAN(x))
        !            44:     return mpfr_set(z, y, rnd_mode);
        !            45:
        !            46:   if (MPFR_IS_NAN(y))
        !            47:     return mpfr_set(z, x, rnd_mode);
        !            48:
        !            49:   if (MPFR_IS_FP(x) && MPFR_IS_ZERO(x) && MPFR_IS_FP(y) && MPFR_IS_ZERO(y))
        !            50:     {
        !            51:       if (MPFR_SIGN(x) < 0)
        !            52:         return mpfr_set(z, x, rnd_mode);
        !            53:       else
        !            54:         return mpfr_set(z, y, rnd_mode);
        !            55:     }
        !            56:
        !            57:   if (mpfr_cmp(x,y) <= 0)
        !            58:     return mpfr_set(z, x, rnd_mode);
        !            59:   else
        !            60:     return mpfr_set(z, y, rnd_mode);
        !            61: }
        !            62:
        !            63:  /* The computation of z=max(x,y)
        !            64:
        !            65:     z=x if x >= y
        !            66:     z=y if x < y
        !            67:  */
        !            68:
        !            69: int
        !            70: mpfr_max (mpfr_ptr z, mpfr_srcptr x, mpfr_srcptr y, mp_rnd_t rnd_mode)
        !            71: {
        !            72:   if (MPFR_IS_NAN(x) && MPFR_IS_NAN(y) )
        !            73:     {
        !            74:       MPFR_SET_NAN(z);
        !            75:       MPFR_RET_NAN;
        !            76:     }
        !            77:   MPFR_CLEAR_NAN(z);
        !            78:
        !            79:   if (MPFR_IS_NAN(x))
        !            80:     return mpfr_set(z, y, rnd_mode);
        !            81:
        !            82:   if (MPFR_IS_NAN(y))
        !            83:     return mpfr_set(z, x, rnd_mode);
        !            84:
        !            85:   if (MPFR_IS_FP(x) && MPFR_IS_ZERO(x) && MPFR_IS_FP(y) && MPFR_IS_ZERO(y))
        !            86:     {
        !            87:       if (MPFR_SIGN(x) < 0)
        !            88:         return mpfr_set(z, y, rnd_mode);
        !            89:       else
        !            90:         return mpfr_set(z, x, rnd_mode);
        !            91:     }
        !            92:
        !            93:   if (mpfr_cmp(x,y) <= 0)
        !            94:     return mpfr_set(z, y, rnd_mode);
        !            95:   else
        !            96:     return mpfr_set(z, x, rnd_mode);
        !            97: }