1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
/* 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 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 */
|
