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Linux kernel mirror (for testing)
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1/*
2 * linux/include/asm-arm/fpstate.h
3 *
4 * Copyright (C) 1995 Russell King
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#ifndef __ASM_ARM_FPSTATE_H
12#define __ASM_ARM_FPSTATE_H
13
14#include <linux/config.h>
15
16#ifndef __ASSEMBLY__
17
18/*
19 * VFP storage area has:
20 * - FPEXC, FPSCR, FPINST and FPINST2.
21 * - 16 double precision data registers
22 * - an implementation-dependant word of state for FLDMX/FSTMX
23 *
24 * FPEXC will always be non-zero once the VFP has been used in this process.
25 */
26
27struct vfp_hard_struct {
28 __u64 fpregs[16];
29#if __LINUX_ARM_ARCH__ < 6
30 __u32 fpmx_state;
31#endif
32 __u32 fpexc;
33 __u32 fpscr;
34 /*
35 * VFP implementation specific state
36 */
37 __u32 fpinst;
38 __u32 fpinst2;
39};
40
41union vfp_state {
42 struct vfp_hard_struct hard;
43};
44
45extern void vfp_flush_thread(union vfp_state *);
46extern void vfp_release_thread(union vfp_state *);
47
48#define FP_HARD_SIZE 35
49
50struct fp_hard_struct {
51 unsigned int save[FP_HARD_SIZE]; /* as yet undefined */
52};
53
54#define FP_SOFT_SIZE 35
55
56struct fp_soft_struct {
57 unsigned int save[FP_SOFT_SIZE]; /* undefined information */
58};
59
60#define IWMMXT_SIZE 0x98
61
62struct iwmmxt_struct {
63 unsigned int save[IWMMXT_SIZE / sizeof(unsigned int)];
64};
65
66union fp_state {
67 struct fp_hard_struct hard;
68 struct fp_soft_struct soft;
69#ifdef CONFIG_IWMMXT
70 struct iwmmxt_struct iwmmxt;
71#endif
72};
73
74#define FP_SIZE (sizeof(union fp_state) / sizeof(int))
75
76#endif
77
78#endif