Leaked source code of windows server 2003
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/*++
Copyright (c) 1996-2000 Microsoft Corporation
Module Name:
eflags.h
Abstract:
Bit positions for the various flag bits inside EFLAGS
Author:
Barry Bond (barrybo) creation-date 25-January-2000
Revision History:
--*/
#ifndef _EFLAGS_INCLUDED
#define _EFLAGS_INCLUDED
#define FLAG_CF (1<<0) // carry
// bit 1 is always 1
#define FLAG_PF (1<<2) // parity
// bit 3 is always 0
#define FLAG_AUX (1<<4) // aux carry
// bit 5 is always 0
#define FLAG_ZF (1<<6) // zero
#define FLAG_SF (1<<7) // sign
#define FLAG_TF (1<<8) // trap
#define FLAG_IF (1<<9) // interrupt enable
#define FLAG_DF (1<<10) // direction
#define FLAG_OF (1<<11) // overflow
#define FLAG_IOPL (3<<12) // IOPL = 3
#define FLAG_NT (1<<14) // nested task
// bit 15 is 0
#define FLAG_RF (1<<16) // resume flag
#define FLAG_VM (1<<17) // virtual mode
#define FLAG_AC (1<<18) // alignment check
#define FLAG_ID (1<<21) // ID bit (CPUID present if this can be toggled)
#endif //_EFLAGS_INCLUDED
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