/*********************************************************************
 *                
 * Copyright (C) 2002,   University of New South Wales
 *                
 * File path:     l4/alpha/specials.h
 * Description:   Alpha specific functions and defines
 *                
 * 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 reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR OR CONTRIBUTORS 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.
 *                
 * $Id: specials.h,v 1.2.4.1 2003/09/24 19:13:47 skoglund Exp $
 *                
 ********************************************************************/
#ifndef __L4__ALPHA__SPECIALS_H__
#define __L4__ALPHA__SPECIALS_H__

/*
 * Architecture specific helper functions.
 */

L4_INLINE int __L4_Msb (L4_Word_t w) __attribute__ ((const));

L4_INLINE int __L4_Msb (L4_Word_t w)
{
    int bitnum;

    if (w == 0)
	return 64;

    for (bitnum = 0, w >>= 1; w != 0; bitnum++)
	w >>= 1;

    return bitnum;
}


#endif /* !__L4__ALPHA__SPECIALS_H__ */