diff options
Diffstat (limited to 'libc/string')
| -rw-r--r-- | libc/string/memmove.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/libc/string/memmove.c b/libc/string/memmove.c index 072104b6c..7c1e9b2fd 100644 --- a/libc/string/memmove.c +++ b/libc/string/memmove.c @@ -32,10 +32,10 @@ void *memmove(void *dst, const void *src, size_t n) { const char *p = src; char *q = dst; - /* We can use the optimized memcpy if the destination is below the - * source (i.e. q < p), or if it is completely over it (i.e. q >= p+n). + /* We can use the optimized memcpy if the destination is completely below the + * source (i.e. q+n <= p), or if it is completely over it (i.e. q >= p+n). */ - if (__builtin_expect((q < p) || ((size_t)(q - p) >= n), 1)) { + if (__builtin_expect((q + n < p) || (q >= p + n), 1)) { return memcpy(dst, src, n); } else { bcopy(src, dst, n); |