sysdeps/arm/get-rounding-mode.h

   1 /* Determine floating-point rounding mode within libc.  ARM version.
   2    Copyright (C) 2012-2018 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 _ARM_GET_ROUNDING_MODE_H
  20 #define _ARM_GET_ROUNDING_MODE_H        1
  21
  22 #include <arm-features.h>
  23 #include <fenv.h>
  24 #include <fpu_control.h>
  25
  26 /* Return the floating-point rounding mode.  */
  27
  28 static inline int
  29 get_rounding_mode (void)
  30 {
  31   fpu_control_t fpscr;
  32
  33   /* FE_TONEAREST is the only supported rounding mode
  34      if a VFP unit isn't present.  */
  35   if (!ARM_HAVE_VFP)
  36     return FE_TONEAREST;
  37
  38   _FPU_GETCW (fpscr);
  39   return fpscr & _FPU_MASK_RM;
  40 }
  41
  42 #endif /* get-rounding-mode.h */