1  /* Install given floating-point control modes.  IA64 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  
      21  #define FPSR_STATUS 0x1f80UL
      22  #define FPSR_STATUS_ALL ((FPSR_STATUS << 6) | (FPSR_STATUS << 19) \
      23  			 | (FPSR_STATUS << 32) | (FPSR_STATUS << 45))
      24  
      25  int
      26  fesetmode (const femode_t *modep)
      27  {
      28    femode_t mode;
      29  
      30    /* As in fesetenv.  */
      31    if (((fenv_t) modep >> 62) == 0x03)
      32      mode = (femode_t) modep & 0x3fffffffffffffffUL;
      33    else
      34      mode = *modep;
      35  
      36    femode_t fpsr;
      37    __asm__ __volatile__ ("mov.m %0=ar.fpsr" : "=r" (fpsr));
      38    fpsr = (fpsr & FPSR_STATUS_ALL) | (mode & ~FPSR_STATUS_ALL);
      39    __asm__ __volatile__ ("mov.m ar.fpsr=%0;;" :: "r" (fpsr));
      40  
      41    return 0;
      42  }