ia64/linux-2.6.18-xen.hg

view arch/v850/lib/memset.c @ 854:950b9eb27661

usbback: fix urb interval value for interrupt urbs.

Signed-off-by: Noboru Iwamatsu <n_iwamatsu@jp.fujitsu.com>
author Keir Fraser <keir.fraser@citrix.com>
date Mon Apr 06 13:51:20 2009 +0100 (2009-04-06)
parents 831230e53067
children
line source
1 /*
2 * arch/v850/lib/memset.c -- Memory initialization
3 *
4 * Copyright (C) 2001,02,04 NEC Corporation
5 * Copyright (C) 2001,02,04 Miles Bader <miles@gnu.org>
6 *
7 * This file is subject to the terms and conditions of the GNU General
8 * Public License. See the file COPYING in the main directory of this
9 * archive for more details.
10 *
11 * Written by Miles Bader <miles@gnu.org>
12 */
14 #include <linux/types.h>
16 void *memset (void *dst, int val, __kernel_size_t count)
17 {
18 if (count) {
19 register unsigned loop;
20 register void *ptr asm ("ep") = dst;
22 /* replicate VAL into a long. */
23 val &= 0xff;
24 val |= val << 8;
25 val |= val << 16;
27 /* copy initial unaligned bytes. */
28 if ((long)ptr & 1) {
29 *(char *)ptr = val;
30 ptr = (void *)((char *)ptr + 1);
31 count--;
32 }
33 if (count > 2 && ((long)ptr & 2)) {
34 *(short *)ptr = val;
35 ptr = (void *)((short *)ptr + 1);
36 count -= 2;
37 }
39 /* 32-byte copying loop. */
40 for (loop = count / 32; loop; loop--) {
41 asm ("sst.w %0, 0[ep]; sst.w %0, 4[ep];"
42 "sst.w %0, 8[ep]; sst.w %0, 12[ep];"
43 "sst.w %0, 16[ep]; sst.w %0, 20[ep];"
44 "sst.w %0, 24[ep]; sst.w %0, 28[ep]"
45 :: "r" (val) : "memory");
46 ptr += 32;
47 }
48 count %= 32;
50 /* long copying loop. */
51 for (loop = count / 4; loop; loop--) {
52 *(long *)ptr = val;
53 ptr = (void *)((long *)ptr + 1);
54 }
55 count %= 4;
57 /* finish up with any trailing bytes. */
58 if (count & 2) {
59 *(short *)ptr = val;
60 ptr = (void *)((short *)ptr + 1);
61 }
62 if (count & 1) {
63 *(char *)ptr = val;
64 }
65 }
67 return dst;
68 }