sysdeps/generic/libm-alias-double.h

   1 /* Define aliases for libm double functions.
   2    Copyright (C) 2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _LIBM_ALIAS_DOUBLE_H
  20 #define _LIBM_ALIAS_DOUBLE_H
  21
  22 /* Define _FloatN / _FloatNx aliases for a double libm function that
  23    has internal name FROM ## R and public names TO ## suffix ## R for
  24    each suffix of a supported _FloatN / _FloatNx floating-point type
  25    with the same format as double.  */
  26 #define libm_alias_double_other_r(from, to, r)
  27
  28 /* Likewise, but without the R suffix.  */
  29 #define libm_alias_double_other(from, to)       \
  30   libm_alias_double_other_r (from, to, )
  31
  32 /* Define aliases for a double libm function that has internal name
  33    FROM ## R and public names TO ## suffix ## R for each suffix of a
  34    supported floating-point type with the same format as double.  This
  35    should only be used for functions where such public names exist for
  36    _FloatN types, not for implementation-namespace exported names
  37    (where there is one name per format, not per type) or for
  38    obsolescent functions not provided for _FloatN types.  */
  39 #ifdef NO_LONG_DOUBLE
  40 # define libm_alias_double_r(from, to, r)       \
  41   weak_alias (from ## r, to ## r)               \
  42   strong_alias (from ## r, from ## l ## r)      \
  43   weak_alias (from ## r, to ## l ## r)          \
  44   libm_alias_double_other_r (from, to, r)
  45 #else
  46 # define libm_alias_double_r(from, to, r)       \
  47   weak_alias (from ## r, to ## r)               \
  48   libm_alias_double_other_r (from, to, r)
  49 #endif
  50
  51 /* Likewise, but without the R suffix.  */
  52 #define libm_alias_double(from, to) libm_alias_double_r (from, to, )
  53
  54 #endif