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 {
33 * VFP implementation specific state
40 struct vfp_hard_struct hard;
43 extern void vfp_flush_thread(union vfp_state *);
44 extern void vfp_release_thread(union vfp_state *);
46 #define FP_HARD_SIZE 35
48 struct fp_hard_struct {
49 unsigned int save[FP_HARD_SIZE]; /* as yet undefined */
52 #define FP_SOFT_SIZE 35
54 struct fp_soft_struct {
55 unsigned int save[FP_SOFT_SIZE]; /* undefined information */
58 #define IWMMXT_SIZE 0x98
60 struct iwmmxt_struct {
61 unsigned int save[IWMMXT_SIZE / sizeof(unsigned int)];
65 struct fp_hard_struct hard;
66 struct fp_soft_struct soft;
68 struct iwmmxt_struct iwmmxt;
72 #define FP_SIZE (sizeof(union fp_state) / sizeof(int))