diff options
Diffstat (limited to 'sysdeps/s390/fpu/fpu_control.h')
| -rw-r--r-- | sysdeps/s390/fpu/fpu_control.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/sysdeps/s390/fpu/fpu_control.h b/sysdeps/s390/fpu/fpu_control.h new file mode 100644 index 0000000000..7552cfa8ff --- /dev/null +++ b/sysdeps/s390/fpu/fpu_control.h @@ -0,0 +1,47 @@ +/* FPU control word definitions. Stub version. + Copyright (C) 1999 Free Software Foundation, Inc. + Contributed by + Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) and + Martin Schwidefsky (schwidefsky@de.ibm.com). + This file is part of the GNU C Library. + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _FPU_CONTROL_H +# define _FPU_CONTROL_H + +# include <features.h> + +/* These bits are reserved are not changed. */ +# define _FPU_RESERVED 0x070700FC + +/* The fdlibm code requires no interrupts for exceptions. Don't + change the rounding mode, it would break long double I/O! */ +#define _FPU_DEFAULT 0x00000000 /* Default value. */ + +/* Type of the control word. */ +typedef unsigned int fpu_control_t; + +/* Macros for accessing the hardware control word. */ +#define _FPU_GETCW(cw) __asm__ volatile ("efpc %0,0" : "=d" (cw)) +#define _FPU_SETCW(cw) __asm__ volatile ("sfpc %0,0" : : "d" (cw)) + +/* Default control word set at startup. */ +extern fpu_control_t __fpu_control; + +#endif /* _FPU_CONTROL_H */ + + + |