/*
 * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/*
 * @OSF_COPYRIGHT@
 */
/* 
 * Mach Operating System
 * Copyright (c) 1991 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 * 
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 * 
 * any improvements or extensions that they make and grant Carnegie Mellon 
 * the rights to redistribute these changes.
 */

#ifndef	_I386_FPU_H_
#define	_I386_FPU_H_

/*
 * Macro definitions for routines to manipulate the
 * floating-point processor.
 */
#include <kern/thread.h>
#include <kern/kern_types.h>
#include <mach/i386/kern_return.h>
#include <mach/i386/thread_status.h>
#include <i386/proc_reg.h>
#include <i386/thread.h>

typedef	enum {
		FXSAVE32 = 1,
		FXSAVE64 = 2,
		XSAVE32  = 3,
		XSAVE64  = 4,
		FP_UNUSED = 5
	} fp_save_layout_t;

extern int		fp_kind;

extern void		init_fpu(void);
extern void		fpu_module_init(void);
extern void		fpu_free(
				void	* fps);
extern kern_return_t	fpu_set_fxstate(
				thread_t	thr_act,
				thread_state_t	state,
				thread_flavor_t f);
extern kern_return_t	fpu_get_fxstate(
				thread_t	thr_act,
				thread_state_t	state,
				thread_flavor_t f);
extern void		fpu_dup_fxstate(
				thread_t	parent,
				thread_t	child);
extern void		fpnoextflt(void);
extern void		fpextovrflt(void);
extern void		fpexterrflt(void);
extern void		fpSSEexterrflt(void);
extern void		fpflush(thread_t);
extern void		fp_setvalid(boolean_t);
#ifdef __i386__
extern void		fxsave64(struct x86_fx_thread_state *);
extern void		fxrstor64(struct x86_fx_thread_state *);
#endif

extern void clear_fpu(void);
extern void fpu_save_context(thread_t thread);

#endif	/* _I386_FPU_H_ */