2 * linux/include/asm-arm/fpstate.h
4 * Copyright (C) 1995 Russell King
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.
11 #ifndef __ASM_ARM_FPSTATE_H
12 #define __ASM_ARM_FPSTATE_H
14 #include <linux/config.h>
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
24 * FPEXC will always be non-zero once the VFP has been used in this process.
27 struct vfp_hard_struct {
29 #if __LINUX_ARM_ARCH__ < 6
35 * VFP implementation specific state
42 struct vfp_hard_struct hard;
45 extern void vfp_flush_thread(union vfp_state *);
46 extern void vfp_release_thread(union vfp_state *);
48 #define FP_HARD_SIZE 35
50 struct fp_hard_struct {
51 unsigned int save[FP_HARD_SIZE]; /* as yet undefined */
54 #define FP_SOFT_SIZE 35
56 struct fp_soft_struct {
57 unsigned int save[FP_SOFT_SIZE]; /* undefined information */
60 #define IWMMXT_SIZE 0x98
62 struct iwmmxt_struct {
63 unsigned int save[IWMMXT_SIZE / sizeof(unsigned int)];
67 struct fp_hard_struct hard;
68 struct fp_soft_struct soft;
70 struct iwmmxt_struct iwmmxt;
74 #define FP_SIZE (sizeof(union fp_state) / sizeof(int))