xiaoxiang781216 commented on code in PR #21033:
URL: https://github.com/apache/nuttx/pull/21033#discussion_r4386892995
##########
libs/libc/string/lib_memcpy.c:
##########
@@ -43,8 +44,41 @@
no_builtin("memcpy")
FAR void *memcpy(FAR void *dest, FAR const void *src, size_t n)
{
- FAR unsigned char *pout = (FAR unsigned char *)dest;
- FAR unsigned char *pin = (FAR unsigned char *)src;
+ FAR uint8_t *pout = (FAR uint8_t *)dest;
+ FAR const uint8_t *pin = (FAR const uint8_t *)src;
+
+ if (!TOO_SMALL4(n) && !(((uintptr_t)pout ^ (uintptr_t)pin) & 3))
Review Comment:
https://github.com/apache/nuttx/blob/master/libs/libc/string/lib_bsdmemcpy.c#L58
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