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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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13
arch/microblaze/lib/memcpy.c
View File

@ -33,17 +33,24 @@
#include <asm/system.h>
#ifdef __HAVE_ARCH_MEMCPY
#ifndef CONFIG_OPT_LIB_FUNCTION
void *memcpy(void *v_dst, const void *v_src, __kernel_size_t c)
{
const char *src = v_src;
char *dst = v_dst;
#ifndef CONFIG_OPT_LIB_FUNCTION
/* Simple, byte oriented memcpy. */
while (c--)
*dst++ = *src++;
return v_dst;
#else
}
#else /* CONFIG_OPT_LIB_FUNCTION */
void *memcpy(void *v_dst, const void *v_src, __kernel_size_t c)
{
const char *src = v_src;
char *dst = v_dst;
/* 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
@ -150,7 +157,7 @@ void *memcpy(void *v_dst, const void *v_src, __kernel_size_t c)
}
return v_dst;
#endif
}
#endif /* CONFIG_OPT_LIB_FUNCTION */
EXPORT_SYMBOL(memcpy);
#endif /* __HAVE_ARCH_MEMCPY */

26
arch/microblaze/lib/memmove.c
View File

@ -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 */

26
arch/microblaze/lib/memset.c
View File

@ -31,17 +31,30 @@
#include <linux/string.h>
#ifdef __HAVE_ARCH_MEMSET
#ifndef CONFIG_OPT_LIB_FUNCTION
void *memset(void *v_src, int c, __kernel_size_t n)
{
char *src = v_src;
#ifdef CONFIG_OPT_LIB_FUNCTION
uint32_t *i_src;
uint32_t w32 = 0;
#endif
/* Truncate c to 8 bits */
c = (c & 0xFF);
/* Simple, byte oriented memset or the rest of count. */
while (n--)
*src++ = c;
return v_src;
}
#else /* CONFIG_OPT_LIB_FUNCTION */
void *memset(void *v_src, int c, __kernel_size_t n)
{
char *src = v_src;
uint32_t *i_src;
uint32_t w32 = 0;
/* Truncate c to 8 bits */
c = (c & 0xFF);
#ifdef CONFIG_OPT_LIB_FUNCTION
if (unlikely(c)) {
/* Make a repeating word out of it */
w32 = c;
@ -72,12 +85,13 @@ void *memset(void *v_src, int c, __kernel_size_t n)
src = (void *)i_src;
}
#endif
/* Simple, byte oriented memset or the rest of count. */
while (n--)
*src++ = c;
return v_src;
}
#endif /* CONFIG_OPT_LIB_FUNCTION */
EXPORT_SYMBOL(memset);
#endif /* __HAVE_ARCH_MEMSET */