- /**
- * Make store aligned when copy size exceeds 512 bytes,
- * and make sure the first 15 bytes are copied, because
- * unaligned copy functions require up to 15 bytes
- * backwards access.
- */
- dstofss = 16 - ((uword) dst & 0x0F) + 16;
- n -= dstofss;
- clib_mov32 ((u8 *) dst, (const u8 *) src);
- src = (const u8 *) src + dstofss;
- dst = (u8 *) dst + dstofss;
+ /**
+ * Make store aligned when copy size exceeds 512 bytes,
+ * and make sure the first 15 bytes are copied, because
+ * unaligned copy functions require up to 15 bytes
+ * backwards access.
+ */
+ dstofss = (uword) dst & 0x0F;
+ if (dstofss > 0)
+ {
+ dstofss = 16 - dstofss + 16;
+ n -= dstofss;
+ clib_mov32 ((u8 *) dst, (const u8 *) src);
+ src = (const u8 *) src + dstofss;
+ dst = (u8 *) dst + dstofss;
+ }