sysdeps/mips/fpu/fesetenv.c

   1 /* Install given floating-point environment.
   2    Copyright (C) 1998-2021 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 <fpu_control.h>
  21
  22 int
  23 __fesetenv (const fenv_t *envp)
  24 {
  25   fpu_control_t cw;
  26
  27   /* Read first current state to flush fpu pipeline.  */
  28   _FPU_GETCW (cw);
  29
  30   if (envp == FE_DFL_ENV)
  31     _FPU_SETCW (_FPU_DEFAULT);
  32   else if (envp == FE_NOMASK_ENV)
  33     _FPU_SETCW (_FPU_IEEE);
  34   else
  35     _FPU_SETCW (envp->__fp_control_register);
  36
  37   /* Success.  */
  38   return 0;
  39 }
  40
  41 libm_hidden_def (__fesetenv)
  42 weak_alias (__fesetenv, fesetenv)
  43 libm_hidden_weak (fesetenv)