1  /* Install given floating-point control modes.  S/390 version.
       2     Copyright (C) 2016-2023 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  #include <fenv_libc.h>
      22  
      23  #define FPC_STATUS (FPC_FLAGS_MASK | FPC_DXC_MASK)
      24  
      25  int
      26  fesetmode (const femode_t *modep)
      27  {
      28    fpu_control_t fpc;
      29  
      30    _FPU_GETCW (fpc);
      31    fpc &= FPC_STATUS;
      32    if (modep == FE_DFL_MODE)
      33      fpc |= _FPU_DEFAULT;
      34    else
      35      fpc |= *modep & ~FPC_STATUS;
      36    _FPU_SETCW (fpc);
      37  
      38    return 0;
      39  }