diff options
Diffstat (limited to 'sysdeps/generic/fpu_control.h')
-rw-r--r-- | sysdeps/generic/fpu_control.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/sysdeps/generic/fpu_control.h b/sysdeps/generic/fpu_control.h new file mode 100644 index 0000000..e91638d --- /dev/null +++ b/sysdeps/generic/fpu_control.h @@ -0,0 +1,46 @@ +/* FPU control word definitions. Stub version. + Copyright (C) 1996, 1997 Free Software Foundation, Inc. + 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 + +#define _FPU_RESERVED ??? /* These bits are reserved are not changed. */ + +/* 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 __attribute__ ((__mode__ (__?I__))); + +/* Macros for accessing the hardware control word. */ +#define _FPU_GETCW(cw) __asm__ ("fetch fpu control word into %0" : "=g" (cw)) +#define _FPU_SETCW(cw) __asm__ ("set fpu control word to %0" : : "g" (cw)) + +/* Default control word set at startup. */ +extern fpu_control_t __fpu_control; + +__BEGIN_DECLS + +/* Called at startup. It can be used to manipulate fpu control register. */ +extern void __setfpucw __P ((fpu_control_t)); + +__END_DECLS + +#endif /* _FPU_CONTROL_H */ |