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microblaze: Separate library optimized functions

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memcpy/memmove/memset

Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek
2010-10-09 13:58:24 +10:00
parent ccea0e6e49
commit 93e2e85139
3 changed files with 48 additions and 17 deletions
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26
arch/microblaze/lib/memmove.c
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@@ -31,16 +31,12 @@
#include <linux/string.h>
#ifdef __HAVE_ARCH_MEMMOVE
#ifndef CONFIG_OPT_LIB_FUNCTION
void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
{
const char *src = v_src;
char *dst = v_dst;
#ifdef CONFIG_OPT_LIB_FUNCTION
const uint32_t *i_src;
uint32_t *i_dst;
#endif
if (!c)
return v_dst;
@@ -48,7 +44,6 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
if (v_dst <= v_src)
return memcpy(v_dst, v_src, c);
#ifndef CONFIG_OPT_LIB_FUNCTION
/* copy backwards, from end to beginning */
src += c;
dst += c;
@@ -58,7 +53,22 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
*--dst = *--src;
return v_dst;
#else
}
#else /* CONFIG_OPT_LIB_FUNCTION */
void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
{
const char *src = v_src;
char *dst = v_dst;
const uint32_t *i_src;
uint32_t *i_dst;
if (!c)
return v_dst;
/* Use memcpy when source is higher than dest */
if (v_dst <= v_src)
return memcpy(v_dst, v_src, c);
/* The following code tries to optimize the copy by using unsigned
* alignment. This will work fine if both source and destination are
* aligned on the same boundary. However, if they are aligned on
@@ -169,7 +179,7 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
*--dst = *--src;
}
return v_dst;
#endif
}
#endif /* CONFIG_OPT_LIB_FUNCTION */
EXPORT_SYMBOL(memmove);
#endif /* __HAVE_ARCH_MEMMOVE */