2 * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
3 * Copyright (C) 2008-2009 PetaLogix
4 * Copyright (C) 2007 John Williams
6 * Reasonably optimised generic C-code for memset on Microblaze
7 * This is generic C code to do efficient, alignment-aware memcpy.
9 * It is based on demo code originally Copyright 2001 by Intel Corp, taken from
10 * http://www.embedded.com/showArticle.jhtml?articleID=19205567
12 * Attempts were made, unsuccessfully, to contact the original
13 * author of this code (Michael Morrow, Intel). Below is the original
16 * This software has been developed by Intel Corporation.
17 * Intel specifically disclaims all warranties, express or
18 * implied, and all liability, including consequential and
19 * other indirect damages, for the use of this program, including
20 * liability for infringement of any proprietary rights,
21 * and including the warranties of merchantability and fitness
22 * for a particular purpose. Intel does not assume any
23 * responsibility for and errors which may appear in this program
24 * not any responsibility to update it.
27 #include <linux/export.h>
28 #include <linux/types.h>
29 #include <linux/stddef.h>
30 #include <linux/compiler.h>
31 #include <linux/string.h>
33 #ifdef __HAVE_ARCH_MEMSET
34 #ifndef CONFIG_OPT_LIB_FUNCTION
35 void *memset(void *v_src
, int c
, __kernel_size_t n
)
39 /* Truncate c to 8 bits */
42 /* Simple, byte oriented memset or the rest of count. */
48 #else /* CONFIG_OPT_LIB_FUNCTION */
49 void *memset(void *v_src
, int c
, __kernel_size_t n
)
55 /* Truncate c to 8 bits */
59 /* Make a repeating word out of it */
66 /* Align the destination to a word boundary */
67 /* This is done in an endian independent manner */
68 switch ((unsigned) src
& 3) {
82 /* Do as many full-word copies as we can */
83 for (; n
>= 4; n
-= 4)
89 /* Simple, byte oriented memset or the rest of count. */
95 #endif /* CONFIG_OPT_LIB_FUNCTION */
96 EXPORT_SYMBOL(memset
);
97 #endif /* __HAVE_ARCH_MEMSET */