1  /* Store current floating-point environment.
       2     Copyright (C) 1997-2023 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_libc.h>
      20  
      21  int
      22  __fegetenv (fenv_t *envp)
      23  {
      24    unsigned long int fpcr;
      25    unsigned long int swcr;
      26  
      27    /* Get status from software and hardware.  Note that we don't need an
      28       excb because the callsys is an implied trap barrier.  */
      29    swcr = __ieee_get_fp_control ();
      30    __asm__ __volatile__ ("mf_fpcr %0" : "=f" (fpcr));
      31  
      32    /* Merge the two bits of information.  */
      33    *envp = ((fpcr & FPCR_ROUND_MASK) | (swcr & SWCR_ALL_MASK));
      34  
      35    /* Success.  */
      36    return 0;
      37  }
      38  
      39  #include <shlib-compat.h>
      40  #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
      41  strong_alias (__fegetenv, __old_fegetenv)
      42  compat_symbol (libm, __old_fegetenv, fegetenv, GLIBC_2_1);
      43  #endif
      44  
      45  libm_hidden_def (__fegetenv)
      46  versioned_symbol (libm, __fegetenv, fegetenv, GLIBC_2_2);
      47  libm_hidden_ver(__fegetenv, fegetenv)