#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
if (likely(c >= 4)) {
unsigned value, buf_hold;
- /* Align the dstination to a word boundry. */
- /* This is done in an endian independant manner. */
+ /* Align the destination to a word boundary. */
+ /* This is done in an endian independent manner. */
switch ((unsigned long)dst & 3) {
case 1:
*dst++ = *src++;
i_dst = (void *)dst;
/* Choose a copy scheme based on the source */
- /* alignment relative to dstination. */
+ /* alignment relative to destination. */
switch ((unsigned long)src & 3) {
case 0x0: /* Both byte offsets are aligned */
i_src = (const void *)src;
case 0x1: /* Unaligned - Off by 1 */
/* Word align the source */
i_src = (const void *) ((unsigned)src & ~3);
-
+#ifndef __MICROBLAZEEL__
/* Load the holding buffer */
buf_hold = *i_src++ << 8;
*i_dst++ = buf_hold | value >> 24;
buf_hold = value << 8;
}
+#else
+ /* Load the holding buffer */
+ buf_hold = (*i_src++ & 0xFFFFFF00) >>8;
+ for (; c >= 4; c -= 4) {
+ value = *i_src++;
+ *i_dst++ = buf_hold | ((value & 0xFF) << 24);
+ buf_hold = (value & 0xFFFFFF00) >>8;
+ }
+#endif
/* Realign the source */
src = (const void *)i_src;
src -= 3;
case 0x2: /* Unaligned - Off by 2 */
/* Word align the source */
i_src = (const void *) ((unsigned)src & ~3);
-
+#ifndef __MICROBLAZEEL__
/* Load the holding buffer */
buf_hold = *i_src++ << 16;
*i_dst++ = buf_hold | value >> 16;
buf_hold = value << 16;
}
+#else
+ /* Load the holding buffer */
+ buf_hold = (*i_src++ & 0xFFFF0000 )>>16;
+ for (; c >= 4; c -= 4) {
+ value = *i_src++;
+ *i_dst++ = buf_hold | ((value & 0xFFFF)<<16);
+ buf_hold = (value & 0xFFFF0000) >>16;
+ }
+#endif
/* Realign the source */
src = (const void *)i_src;
src -= 2;
case 0x3: /* Unaligned - Off by 3 */
/* Word align the source */
i_src = (const void *) ((unsigned)src & ~3);
-
+#ifndef __MICROBLAZEEL__
/* Load the holding buffer */
buf_hold = *i_src++ << 24;
*i_dst++ = buf_hold | value >> 8;
buf_hold = value << 24;
}
+#else
+ /* Load the holding buffer */
+ buf_hold = (*i_src++ & 0xFF000000) >> 24;
+ for (; c >= 4; c -= 4) {
+ value = *i_src++;
+ *i_dst++ = buf_hold | ((value & 0xFFFFFF) << 8);
+ buf_hold = (value & 0xFF000000) >> 24;
+ }
+#endif
/* Realign the source */
src = (const void *)i_src;
src -= 1;
}
/* Finish off any remaining bytes */
- /* simple fast copy, ... unless a cache boundry is crossed */
+ /* simple fast copy, ... unless a cache boundary is crossed */
switch (c) {
case 3:
*dst++ = *src++;
}
return v_dst;
-#endif
}
+#endif /* CONFIG_OPT_LIB_FUNCTION */
EXPORT_SYMBOL(memcpy);
#endif /* __HAVE_ARCH_MEMCPY */