sysdeps/generic/libm-alias-float.h

   1 /* Define aliases for libm float functions.
   2    Copyright (C) 2017-2022 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    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _LIBM_ALIAS_FLOAT_H
  20 #define _LIBM_ALIAS_FLOAT_H
  21
  22 #include <bits/floatn.h>
  23
  24 /* Define _FloatN / _FloatNx aliases for a float libm function that
  25    has internal name FROM ## f ## R and public names TO ## suffix ## R
  26    for each suffix of a supported _FloatN / _FloatNx floating-point
  27    type with the same format as float.  */
  28 #if __HAVE_FLOAT32 && !__HAVE_DISTINCT_FLOAT32
  29 # define libm_alias_float_other_r(from, to, r)  \
  30   weak_alias (from ## f ## r, to ## f32 ## r)
  31 #else
  32 # define libm_alias_float_other_r(from, to, r)
  33 #endif
  34
  35 /* Likewise, but without the R suffix.  */
  36 #define libm_alias_float_other(from, to)        \
  37   libm_alias_float_other_r (from, to, )
  38
  39 /* Define aliases for a float libm function that has internal name
  40    FROM ## f ## R and public names TO ## suffix ## R for each suffix
  41    of a supported floating-point type with the same format as float.
  42    This should only be used for functions where such public names
  43    exist for _FloatN types, not for implementation-namespace exported
  44    names (where there is one name per format, not per type) or for
  45    obsolescent functions not provided for _FloatN types.  */
  46 #define libm_alias_float_r(from, to, r)         \
  47   weak_alias (from ## f ## r, to ## f ## r);    \
  48   libm_alias_float_other_r (from, to, r)
  49
  50 /* Likewise, but without the R suffix.  */
  51 #define libm_alias_float(from, to) libm_alias_float_r (from, to, )
  52
  53 #endif