68 lines
2.2 KiB
C
68 lines
2.2 KiB
C
/*
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* Mach Operating System
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* Copyright (c) 1991,1990,1989 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*/
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/*
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* HISTORY
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* $Log: eflags.h,v $
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* Revision 2.4 91/05/14 16:06:35 mrt
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* Correcting copyright
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*
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* Revision 2.3 91/02/05 17:11:26 mrt
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* Changed to new Mach copyright
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* [91/02/01 17:31:41 mrt]
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*
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* Revision 2.2 90/05/03 15:25:03 dbg
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* Created.
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* [90/02/08 dbg]
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*
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*/
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#ifndef _I386_EFLAGS_H_
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#define _I386_EFLAGS_H_
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/*
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* i386 flags register
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*/
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#define EFL_CF 0x00000001 /* carry */
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#define EFL_PF 0x00000004 /* parity of low 8 bits */
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#define EFL_AF 0x00000010 /* carry out of bit 3 */
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#define EFL_ZF 0x00000040 /* zero */
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#define EFL_SF 0x00000080 /* sign */
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#define EFL_TF 0x00000100 /* trace trap */
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#define EFL_IF 0x00000200 /* interrupt enable */
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#define EFL_DF 0x00000400 /* direction */
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#define EFL_OF 0x00000800 /* overflow */
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#define EFL_IOPL 0x00003000 /* IO privilege level: */
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#define EFL_IOPL_KERNEL 0x00000000 /* kernel */
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#define EFL_IOPL_USER 0x00003000 /* user */
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#define EFL_NT 0x00004000 /* nested task */
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#define EFL_RF 0x00010000 /* resume without tracing */
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#define EFL_VM 0x00020000 /* virtual 8086 mode */
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#define EFL_USER_SET (EFL_IF)
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#define EFL_USER_CLEAR (EFL_IOPL|EFL_NT|EFL_RF)
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#endif _I386_EFLAGS_H_
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