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/* misc.c -- Misc. routines that just don't fit anywhere else
   Copyright (C) 1999 Damjan Lampret, lampret@opencores.org
   Copyright (C) 2002 Marko Mlinar, markom@opencores.org
 
This file is part of OpenRISC 1000 Architectural Simulator.
 
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
 
/* returns log2(x) */
/* Call this log2_int, because there is a library function named log2 */
int log2_int (unsigned long x)
{
  int c = 0;
  if (!x) return 0; /* not by the book, but practical */
  while (x != 1) x >>= 1, c++;
  return c;
}
 
int is_power2 (int x)
{
  if(!x)
    return 0;
  while (!(x & 1))
    x >>= 1;
  return x == 1;
}