1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * arch/arm/include/asm/fpstate.h
5 * Copyright (C) 1995 Russell King
8 #ifndef __ASM_ARM_FPSTATE_H
9 #define __ASM_ARM_FPSTATE_H
15 * VFP storage area has:
16 * - FPEXC, FPSCR, FPINST and FPINST2.
17 * - 16 or 32 double precision data registers
18 * - an implementation-dependent word of state for FLDMX/FSTMX (pre-ARMv6)
20 * FPEXC will always be non-zero once the VFP has been used in this process.
23 struct vfp_hard_struct {
29 #if __LINUX_ARM_ARCH__ < 6
35 * VFP implementation specific state
46 struct vfp_hard_struct hard;
49 extern void vfp_flush_thread(union vfp_state *);
50 extern void vfp_release_thread(union vfp_state *);
52 #define FP_HARD_SIZE 35
54 struct fp_hard_struct {
55 unsigned int save[FP_HARD_SIZE]; /* as yet undefined */
58 #define FP_SOFT_SIZE 35
60 struct fp_soft_struct {
61 unsigned int save[FP_SOFT_SIZE]; /* undefined information */
64 #define IWMMXT_SIZE 0x98
66 struct iwmmxt_struct {
67 unsigned int save[IWMMXT_SIZE / sizeof(unsigned int)];
71 struct fp_hard_struct hard;
72 struct fp_soft_struct soft;
74 struct iwmmxt_struct iwmmxt;
78 #define FP_SIZE (sizeof(union fp_state) / sizeof(int))