microblaze: Separate library optimized functions

memcpy/memmove/memset
Signed-off-by: Michal Simek <monstr@monstr.eu>

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 */

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 */

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 */