sysdeps/generic/fpu_control.h

   1 /* FPU control word definitions.  Stub version.
   2    Copyright (C) 1996-2023 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 #ifndef _FPU_CONTROL_H
  20 #define _FPU_CONTROL_H
  21
  22 #define _FPU_RESERVED 0xffffffff    /* These bits are reserved and not changed.  */
  23
  24 /* The fdlibm code requires no interrupts for exceptions.  Don't
  25    change the rounding mode, it would break long double I/O!  */
  26 #define _FPU_DEFAULT  0x00000000 /* Default value.  */
  27
  28 /* Type of the control word.  */
  29 typedef unsigned int fpu_control_t;
  30
  31 /* Macros for accessing the hardware control word.  */
  32 #define _FPU_GETCW(cw) (cw) = 0
  33 #define _FPU_SETCW(cw) (void) (cw)
  34
  35 /* Default control word set at startup.  */
  36 extern fpu_control_t __fpu_control;
  37
  38 #endif /* _FPU_CONTROL_H */