76 lines
2.1 KiB
C
76 lines
2.1 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2006 by Jens Arnold
|
|
*
|
|
* All files in this archive are subject to the GNU General Public License.
|
|
* See the file COPYING in the source tree root for full license agreement.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#include <string.h>
|
|
#define LBLOCKSIZE (sizeof(long)/2)
|
|
#define UNALIGNED(X) ((long)X & (sizeof(long) - 1))
|
|
#define TOO_SMALL(LEN) ((LEN) < LBLOCKSIZE)
|
|
|
|
void memset16(void *dst, int val, size_t len)
|
|
{
|
|
#if defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__)
|
|
unsigned short *p = (unsigned short *)dst;
|
|
|
|
while (len--)
|
|
*p++ = val;
|
|
#else
|
|
unsigned short *p = (unsigned short *)dst;
|
|
unsigned int i;
|
|
unsigned long buffer;
|
|
unsigned long *aligned_addr;
|
|
|
|
if (!TOO_SMALL(len) && !UNALIGNED(dst))
|
|
{
|
|
aligned_addr = (unsigned long *)dst;
|
|
|
|
val &= 0xffff;
|
|
if (LBLOCKSIZE == 2)
|
|
{
|
|
buffer = (val << 16) | val;
|
|
}
|
|
else
|
|
{
|
|
buffer = 0;
|
|
for (i = 0; i < LBLOCKSIZE; i++)
|
|
buffer = (buffer << 16) | val;
|
|
}
|
|
|
|
while (len >= LBLOCKSIZE*4)
|
|
{
|
|
*aligned_addr++ = buffer;
|
|
*aligned_addr++ = buffer;
|
|
*aligned_addr++ = buffer;
|
|
*aligned_addr++ = buffer;
|
|
len -= 4*LBLOCKSIZE;
|
|
}
|
|
|
|
while (len >= LBLOCKSIZE)
|
|
{
|
|
*aligned_addr++ = buffer;
|
|
len -= LBLOCKSIZE;
|
|
}
|
|
|
|
p = (unsigned short *)aligned_addr;
|
|
}
|
|
|
|
while (len--)
|
|
*p++ = val;
|
|
#endif /* not PREFER_SIZE_OVER_SPEED */
|
|
}
|