sysdeps/powerpc/power5+/fpu/s_modff.c

   1 /* Copyright (C) 2013-2015 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If
  16    not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include <math.h>
  19 #include <math_private.h>
  20
  21 float
  22 __modff (float x, float *iptr)
  23 {
  24   if (__builtin_isinff (x))
  25     {
  26       *iptr = x;
  27       return __copysignf (0.0, x);
  28     }
  29   else if (__builtin_isnanf (x))
  30     {
  31       *iptr = NAN;
  32       return NAN;
  33     }
  34
  35   if (x >= 0.0)
  36     {
  37       *iptr = __floorf (x);
  38       return __copysignf (x - *iptr, x);
  39     }
  40   else
  41     {
  42       *iptr = __ceilf (x);
  43       return __copysignf (x - *iptr, x);
  44     }
  45 }
  46 weak_alias (__modff, modff)