diff options
Diffstat (limited to 'sysdeps/arm/fpu_control.h')
-rw-r--r-- | sysdeps/arm/fpu_control.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/sysdeps/arm/fpu_control.h b/sysdeps/arm/fpu_control.h new file mode 100644 index 0000000000..6a4a4bb0f0 --- /dev/null +++ b/sysdeps/arm/fpu_control.h @@ -0,0 +1,48 @@ +/* FPU control word definitions. Stub version. +Copyright (C) 1996 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., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#ifndef _FPU_CONTROL_H +#define _FPU_CONTROL_H + +#define _FPU_RESERVED 0xffffffff /* These bits are reserved. */ + +/* 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. + * On the ARM, we can't do this from user mode (it would trap). + */ +#define _FPU_GETCW(cw) __asm__ ("movnv r0,r0" : "=g" (cw)) +#define _FPU_SETCW(cw) __asm__ ("movnv r0,r0" : : "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 */ |