sysdeps/sparc/fpu/fesetenv.c

   1 /* Install given floating-point environment.
   2    Copyright (C) 1997-2022 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 #include <fenv.h>
  20 #include <fenv_private.h>
  21 #include <shlib-compat.h>
  22
  23 int
  24 __fesetenv (const fenv_t *envp)
  25 {
  26   fenv_t dummy;
  27
  28   /* Put these constants in memory explicitly, so as to cope with a
  29      -fPIC bug as of gcc 970624.  Making them automatic is quicker
  30      than loading up the pic register in this instance.  */
  31
  32   if (envp == FE_DFL_ENV)
  33     {
  34       dummy = 0;
  35       envp = &dummy;
  36     }
  37   else if (envp == FE_NOMASK_ENV)
  38     {
  39       dummy = 0x1f << 23;
  40       envp = &dummy;
  41     }
  42
  43   __fenv_ldfsr (*envp);
  44
  45   /* Success.  */
  46   return 0;
  47 }
  48
  49 #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
  50 strong_alias (__fesetenv, __old_fesetenv)
  51 compat_symbol (libm, __old_fesetenv, fesetenv, GLIBC_2_1);
  52 #endif
  53
  54 libm_hidden_def (__fesetenv)
  55 libm_hidden_ver (__fesetenv, fesetenv)
  56 versioned_symbol (libm, __fesetenv, fesetenv, GLIBC_2_2);