freebsd-skq/sys/i386/include/eflags.h

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1993-06-12 14:58:17 +00:00
/*
* Mach Operating System
* Copyright (c) 1991,1990,1989 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.
*
* $Id$
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*/
#ifndef _I386_EFLAGS_H_
#define _I386_EFLAGS_H_
/*
* i386 flags register
*/
#define EFL_CF 0x00000001 /* carry */
#define EFL_PF 0x00000004 /* parity of low 8 bits */
#define EFL_AF 0x00000010 /* carry out of bit 3 */
#define EFL_ZF 0x00000040 /* zero */
#define EFL_SF 0x00000080 /* sign */
#define EFL_TF 0x00000100 /* trace trap */
#define EFL_IF 0x00000200 /* interrupt enable */
#define EFL_DF 0x00000400 /* direction */
#define EFL_OF 0x00000800 /* overflow */
#define EFL_IOPL 0x00003000 /* IO privilege level: */
#define EFL_IOPL_KERNEL 0x00000000 /* kernel */
#define EFL_IOPL_USER 0x00003000 /* user */
#define EFL_NT 0x00004000 /* nested task */
#define EFL_RF 0x00010000 /* resume without tracing */
#define EFL_VM 0x00020000 /* virtual 8086 mode */
#define EFL_USER_SET (EFL_IF)
#define EFL_USER_CLEAR (EFL_IOPL|EFL_NT|EFL_RF)
#endif _I386_EFLAGS_H_