1 /* FPU control word definitions. Stub version.
2 Copyright (C) 1996 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
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 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If
17 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
18 Cambridge, MA 02139, USA. */
20 #ifndef _FPU_CONTROL_H
21 #define _FPU_CONTROL_H
23 #define _FPU_RESERVED ??? /* These bits are reserved are not changed. */
25 /* The fdlibm code requires no interrupts for exceptions. Don't
26 change the rounding mode, it would break long double I/O! */
27 #define _FPU_DEFAULT 0x00000000 /* Default value. */
29 /* Type of the control word. */
30 typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__?I__)));
32 /* Macros for accessing the hardware control word. */
33 #define _FPU_GETCW(cw) __asm__ ("fetch fpu control word into %0" : "=g" (cw))
34 #define _FPU_SETCW(cw) __asm__ ("set fpu control word to %0" : : "g" (cw))
36 /* Default control word set at startup. */
37 extern fpu_control_t __fpu_control;
41 /* Called at startup. It can be used to manipulate fpu control register. */
42 extern void __setfpucw __P ((fpu_control_t));
46 #endif /* _FPU_CONTROL_H */