ports/sysdeps/m68k/m680x0/fpu/s_expm1.c

   1 /* Copyright (C) 2012-2014 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 Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the 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    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library.  If not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <math.h>
  19 #include <errno.h>
  20 #include "mathimpl.h"
  21
  22 #ifndef FUNC
  23 # define FUNC expm1
  24 #endif
  25 #ifndef float_type
  26 # define float_type double
  27 #endif
  28 #ifndef o_threshold
  29 # define o_threshold 7.09782712893383973096e+02
  30 #endif
  31
  32 #define CONCATX(a,b) __CONCAT(a,b)
  33
  34 float_type
  35 CONCATX(__,FUNC) (float_type x)
  36 {
  37   if ((__m81_test (x) & __M81_COND_INF) == 0 && isgreater (x, o_threshold))
  38     __set_errno (ERANGE);
  39   return __m81_u(CONCATX(__, FUNC)) (x);
  40 }
  41 weak_alias (CONCATX(__, FUNC), FUNC)