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authorMichal Simek <monstr@monstr.eu>2010-10-09 13:58:24 +1000
committerMichal Simek <monstr@monstr.eu>2010-10-21 15:52:01 +1000
commit93e2e85139509338c68279c7260ebb68177b23a9 (patch)
tree64171deb6d2f046da3cf7c5111f73e419be1d460 /arch/microblaze/lib
parentccea0e6e49e4db8ee7968c183ecddb3e399c5f54 (diff)
downloadlinux-93e2e85139509338c68279c7260ebb68177b23a9.tar.gz
microblaze: Separate library optimized functions
memcpy/memmove/memset Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze/lib')
-rw-r--r--arch/microblaze/lib/memcpy.c13
-rw-r--r--arch/microblaze/lib/memmove.c26
-rw-r--r--arch/microblaze/lib/memset.c22
3 files changed, 46 insertions, 15 deletions
diff --git a/arch/microblaze/lib/memcpy.c b/arch/microblaze/lib/memcpy.c
index 014bac92bdf..ab2d115f9ee 100644
--- a/arch/microblaze/lib/memcpy.c
+++ b/arch/microblaze/lib/memcpy.c
@@ -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 */
diff --git a/arch/microblaze/lib/memmove.c b/arch/microblaze/lib/memmove.c
index 0929198c5e6..1d3c0e7990e 100644
--- a/arch/microblaze/lib/memmove.c
+++ b/arch/microblaze/lib/memmove.c
@@ -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 */
diff --git a/arch/microblaze/lib/memset.c b/arch/microblaze/lib/memset.c
index ecfb663e1fc..834565d1607 100644
--- a/arch/microblaze/lib/memset.c
+++ b/arch/microblaze/lib/memset.c
@@ -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;
+
+ /* 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;
-#ifdef CONFIG_OPT_LIB_FUNCTION
uint32_t *i_src;
uint32_t w32 = 0;
-#endif
+
/* 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 */