diff options
| -rw-r--r-- | lib_generic/string.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/lib_generic/string.c b/lib_generic/string.c index 181eda6..61a45dc 100644 --- a/lib_generic/string.c +++ b/lib_generic/string.c @@ -446,12 +446,23 @@ char * bcopy(const char * src, char * dest, int count) * You should not use this function to access IO space, use memcpy_toio() * or memcpy_fromio() instead. */ -void * memcpy(void * dest,const void *src,size_t count) +void * memcpy(void *dest, const void *src, size_t count) { - char *tmp = (char *) dest, *s = (char *) src; - + unsigned long *dl = (unsigned long *)dest, *sl = (unsigned long *)src; + char *d8, *s8; + + /* while all data is aligned (common case), copy a word at a time */ + if ( (((ulong)dest | (ulong)src) & (sizeof(*dl) - 1)) == 0) { + while (count >= sizeof(*dl)) { + *dl++ = *sl++; + count -= sizeof(*dl); + } + } + /* copy the reset one byte at a time */ + d8 = (char *)dl; + s8 = (char *)sl; while (count--) - *tmp++ = *s++; + *d8++ = *s8++; return dest; } |