blob: 5d2604bafb0f51d3402bcd2eefafbd624dfe8f8b (
plain)
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
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
/* FPU control word definitions. SH version.
Copyright (C) 1999-2014 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _FPU_CONTROL_H
#define _FPU_CONTROL_H
#if !defined(__SH_FPU_ANY__)
#define _FPU_RESERVED 0xffffffff
#define _FPU_DEFAULT 0x00000000
typedef unsigned int fpu_control_t;
#define _FPU_GETCW(cw) (cw) = 0
#define _FPU_SETCW(cw) (void) (cw)
extern fpu_control_t __fpu_control;
#else
#include <features.h>
/* masking of interrupts */
#define _FPU_MASK_VM 0x0800 /* Invalid operation */
#define _FPU_MASK_ZM 0x0400 /* Division by zero */
#define _FPU_MASK_OM 0x0200 /* Overflow */
#define _FPU_MASK_UM 0x0100 /* Underflow */
#define _FPU_MASK_IM 0x0080 /* Inexact operation */
/* rounding control */
#define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */
#define _FPU_RC_ZERO 0x1
#define _FPU_RESERVED 0xffc00000 /* These bits are reserved. */
/* The fdlibm code requires strict IEEE double precision arithmetic,
and no interrupts for exceptions, rounding to nearest. */
#define _FPU_DEFAULT 0x00080000 /* Default value. */
#define _FPU_IEEE 0x00080f80 /* Default + exceptions enabled. */
/* Type of the control word. */
typedef unsigned int fpu_control_t;
/* Macros for accessing the hardware control word. */
#define _FPU_GETCW(cw) __asm__ ("sts fpscr,%0" : "=r" (cw))
#if defined __GNUC__
__BEGIN_DECLS
/* GCC provides this function. */
extern void __set_fpscr (unsigned long);
#define _FPU_SETCW(cw) __set_fpscr ((cw))
#else
#define _FPU_SETCW(cw) __asm__ ("lds %0,fpscr" : : "r" (cw))
#endif
/* Default control word set at startup. */
extern fpu_control_t __fpu_control;
__END_DECLS
#endif /* __SH_FPU_ANY__ */
#endif /* _FPU_CONTROL_H */
|
