sysdeps/ieee754/flt-32/s_totalordermagf.c

   1 /* Total order operation on absolute values.  flt-32 version.
   2    Copyright (C) 2016-2024 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 #include <math.h>
  20 #include <math_private.h>
  21 #include <libm-alias-float.h>
  22 #include <nan-high-order-bit.h>
  23 #include <stdint.h>
  24 #include <shlib-compat.h>
  25 #include <first-versions.h>
  26
  27 int
  28 __totalordermagf (const float *x, const float *y)
  29 {
  30   uint32_t ix, iy;
  31   GET_FLOAT_WORD (ix, *x);
  32   GET_FLOAT_WORD (iy, *y);
  33   ix &= 0x7fffffff;
  34   iy &= 0x7fffffff;
  35 #if HIGH_ORDER_BIT_IS_SET_FOR_SNAN
  36   /* For the preferred quiet NaN convention, this operation is a
  37      comparison of the representations of the absolute values of the
  38      arguments.  If both arguments are NaNs, invert the
  39      quiet/signaling bit so comparing that way works.  */
  40   if (ix > 0x7f800000 && iy > 0x7f800000)
  41     {
  42       ix ^= 0x00400000;
  43       iy ^= 0x00400000;
  44     }
  45 #endif
  46   return ix <= iy;
  47 }
  48 #ifdef SHARED
  49 # define CONCATX(x, y) x ## y
  50 # define CONCAT(x, y) CONCATX (x, y)
  51 # define UNIQUE_ALIAS(name) CONCAT (name, __COUNTER__)
  52 # define do_symbol(orig_name, name, aliasname)          \
  53   strong_alias (orig_name, name)                        \
  54   versioned_symbol (libm, name, aliasname, GLIBC_2_31)
  55 # undef weak_alias
  56 # define weak_alias(name, aliasname)                    \
  57   do_symbol (name, UNIQUE_ALIAS (name), aliasname);
  58 #endif
  59 libm_alias_float (__totalordermag, totalordermag)
  60 #if SHLIB_COMPAT (libm, GLIBC_2_25, GLIBC_2_31)
  61 int
  62 attribute_compat_text_section
  63 __totalordermag_compatf (float x, float y)
  64 {
  65   return __totalordermagf (&x, &y);
  66 }
  67 #undef do_symbol
  68 #define do_symbol(orig_name, name, aliasname)                   \
  69   strong_alias (orig_name, name)                                \
  70   compat_symbol (libm, name, aliasname,                         \
  71                  CONCAT (FIRST_VERSION_libm_, aliasname))
  72 libm_alias_float (__totalordermag_compat, totalordermag)
  73 #endif