1  /* Install given floating-point control modes.  RISC-V version.
       2     Copyright (C) 2017-2023 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  
      22  int
      23  fesetmode (const femode_t *modep)
      24  {
      25    asm volatile ("csrc fcsr, %0" : : "r" (~FE_ALL_EXCEPT));
      26  
      27    if (modep != FE_DFL_MODE)
      28      asm volatile ("csrs fcsr, %0" : : "r" (*modep & ~FE_ALL_EXCEPT));
      29  
      30    return 0;
      31  }