fpu_system.h

freebsd v4.4内核源码

/*
 *  fpu_system.h
 *
 *
 * Copyright (C) 1992,1993,1994
 *                       W. Metzenthen, 22 Parker St, Ormond, Vic 3163,
 *                       Australia.  E-mail   [e-mail]
 * All rights reserved.
 *
 * This copyright notice covers the redistribution and use of the
 * FPU emulator developed by W. Metzenthen. It covers only its use
 * in the 386BSD, FreeBSD and NetBSD operating systems. Any other
 * use is not permitted under this copyright.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must include information specifying
 *    that source code for the emulator is freely available and include
 *    either:
 *      a) an offer to provide the source code for a nominal distribution
 *         fee, or
 *      b) list at least two alternative methods whereby the source
 *         can be obtained, e.g. a publically accessible bulletin board
 *         and an anonymous ftp site from which the software can be
 *         downloaded.
 * 3. All advertising materials specifically mentioning features or use of
 *    this emulator must acknowledge that it was developed by W. Metzenthen.
 * 4. The name of W. Metzenthen may not be used to endorse or promote
 *    products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * W. METZENTHEN BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *
 * The purpose of this copyright, based upon the Berkeley copyright, is to
 * ensure that the covered software remains freely available to everyone.
 *
 * The software (with necessary differences) is also available, but under
 * the terms of the GNU copyleft, for the Linux operating system and for
 * the djgpp ms-dos extender.
 *
 * W. Metzenthen   June 1994.
 *
 *
 * $FreeBSD: src/sys/gnu/i386/fpemul/fpu_system.h,v 1.4.8.1 1999/09/05 08:09:41 peter Exp $
 *
 */


#ifndef _FPU_SYSTEM_H
#define _FPU_SYSTEM_H

/* system dependent definitions */

/*
#include <linux/sched.h>
#include <linux/kernel.h>
*/

#define I387 (*(union i387_union *)&(((struct pcb *)curproc->p_addr)->pcb_savefpu))
#define FPU_info		(I387.soft.frame)

#define FPU_CS			(*(unsigned short *) &(FPU_info->tf_cs))
#define FPU_DS			(*(unsigned short *) &(FPU_info->tf_ds))
#define FPU_EAX			(FPU_info->tf_eax)
#define FPU_EFLAGS		(FPU_info->tf_eflags)
#define FPU_EIP			(FPU_info->tf_eip)
/*#define FPU_ORIG_EIP		(FPU_info->___orig_eip) */
/*#define FPU_ORIG_EIP		(FPU_info->tf_isp)*/
#define FPU_ORIG_EIP		(I387.soft.orig_eip)

#define FPU_lookahead           (I387.soft.lookahead)
#define FPU_entry_eip           (I387.soft.entry_eip)

#define status_word		(I387.soft.swd)
#define control_word		(I387.soft.cwd)
#define regs			(I387.soft.regs)
#define top			(I387.soft.top)

#define ip_offset		(I387.soft.fip)
#define cs_selector		(I387.soft.fcs)
#define data_operand_offset	(I387.soft.foo)
#define operand_selector	(I387.soft.fos)

#endif