sysdeps/alpha/fpu/get-rounding-mode.h

   1 /* Determine floating-point rounding mode within libc.  Alpha version.
   2    Copyright (C) 2012-2015 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef ALPHA_GET_ROUNDING_MODE_H
  20 #define ALPHA_GET_ROUNDING_MODE_H       1
  21
  22 #include <fenv.h>
  23 #include <fenv_libc.h>
  24
  25 /* Return the floating-point rounding mode.  */
  26
  27 static inline int
  28 get_rounding_mode (void)
  29 {
  30   unsigned long fpcr;
  31   __asm__ __volatile__("excb; mf_fpcr %0" : "=f"(fpcr));
  32   return (fpcr >> FPCR_ROUND_SHIFT) & 3;
  33 }
  34
  35 #endif /* get-rounding-mode.h */