Source to arch/i386/include/pio.h

/* 
 * Mach Operating System
 * Copyright (c) 1990 Carnegie-Mellon University
 * All rights reserved.  The CMU software License Agreement specifies
 * the terms and conditions for use and redistribution.
 */
/* 
 * HISTORY
 * $Log: pio.h,v $
 * Revision 1.1  1993/03/21 18:09:48  cgd
 * after 0.2.2 "stable" patches applied
 *
 * Revision 1.1  1992/05/27  00:48:30  balsup
 * machkern/cor merge
 *
 * Revision 1.1  1991/10/10  20:11:39  balsup
 * Initial revision
 *
 * Revision 2.2  91/04/02  11:52:29  mbj
 * 	[90/08/14            mg32]
 * 
 * 	Now we know how types are factor in.
 * 	Cleaned up a bunch: eliminated ({ for output and flushed unused
 * 	output variables.
 * 	[90/08/14            rvb]
 * 
 * 	This is how its done in gcc:
 * 		Created.
 * 	[90/03/26            rvb]
 * 
 */


#define inl(y) \
({ unsigned long _tmp__; \
	asm volatile("inl %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
	_tmp__; })

#define inw(y) \
({ unsigned short _tmp__; \
	asm volatile(".byte 0x66; inl %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
	_tmp__; })

#define inb(y) \
({ unsigned char _tmp__; \
	asm volatile("inb %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
	_tmp__; })


#define outl(x, y) \
{ asm volatile("outl %0, %1" : : "a" (y) , "d" ((unsigned short)(x))); }


#define outw(x, y) \
{asm volatile(".byte 0x66; outl %0, %1" : : "a" ((unsigned short)(y)) , "d" ((unsigned short)(x))); }


#define outb(x, y) \
{ asm volatile("outb %0, %1" : : "a" ((unsigned char)(y)) , "d" ((unsigned short)(x))); }