Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* Copyright (C) 1991, 1997 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. | |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
15 | License along with the GNU C Library; if not, write to the Free | |
16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
17 | 02111-1307 USA. */ | |
18 | ||
19 | /* Slight modifications for pa-risc linux - Paul Bame <bame@debian.org> */ | |
20 | ||
21 | #include <linux/types.h> | |
22 | #include <asm/string.h> | |
23 | ||
24 | #define OPSIZ (BITS_PER_LONG/8) | |
25 | typedef unsigned long op_t; | |
26 | ||
27 | void * | |
28 | memset (void *dstpp, int sc, size_t len) | |
29 | { | |
30 | unsigned int c = sc; | |
31 | long int dstp = (long int) dstpp; | |
32 | ||
33 | if (len >= 8) | |
34 | { | |
35 | size_t xlen; | |
36 | op_t cccc; | |
37 | ||
38 | cccc = (unsigned char) c; | |
39 | cccc |= cccc << 8; | |
40 | cccc |= cccc << 16; | |
41 | if (OPSIZ > 4) | |
42 | /* Do the shift in two steps to avoid warning if long has 32 bits. */ | |
43 | cccc |= (cccc << 16) << 16; | |
44 | ||
45 | /* There are at least some bytes to set. | |
46 | No need to test for LEN == 0 in this alignment loop. */ | |
47 | while (dstp % OPSIZ != 0) | |
48 | { | |
49 | ((unsigned char *) dstp)[0] = c; | |
50 | dstp += 1; | |
51 | len -= 1; | |
52 | } | |
53 | ||
54 | /* Write 8 `op_t' per iteration until less than 8 `op_t' remain. */ | |
55 | xlen = len / (OPSIZ * 8); | |
56 | while (xlen > 0) | |
57 | { | |
58 | ((op_t *) dstp)[0] = cccc; | |
59 | ((op_t *) dstp)[1] = cccc; | |
60 | ((op_t *) dstp)[2] = cccc; | |
61 | ((op_t *) dstp)[3] = cccc; | |
62 | ((op_t *) dstp)[4] = cccc; | |
63 | ((op_t *) dstp)[5] = cccc; | |
64 | ((op_t *) dstp)[6] = cccc; | |
65 | ((op_t *) dstp)[7] = cccc; | |
66 | dstp += 8 * OPSIZ; | |
67 | xlen -= 1; | |
68 | } | |
69 | len %= OPSIZ * 8; | |
70 | ||
71 | /* Write 1 `op_t' per iteration until less than OPSIZ bytes remain. */ | |
72 | xlen = len / OPSIZ; | |
73 | while (xlen > 0) | |
74 | { | |
75 | ((op_t *) dstp)[0] = cccc; | |
76 | dstp += OPSIZ; | |
77 | xlen -= 1; | |
78 | } | |
79 | len %= OPSIZ; | |
80 | } | |
81 | ||
82 | /* Write the last few bytes. */ | |
83 | while (len > 0) | |
84 | { | |
85 | ((unsigned char *) dstp)[0] = c; | |
86 | dstp += 1; | |
87 | len -= 1; | |
88 | } | |
89 | ||
90 | return dstpp; | |
91 | } |