-* v0-v15: vectors with INT8 elements, split into 8 x signed (v0-v7)
- & 8 x unsigned (v8-v15)
-* v16-v29: vectors with INT16 elements, split into 8 x signed (v16-v23)
- & 6 x unsigned (v24-v29)
+* v0-v15: vectors with INT8 elements, split into signed (v0-v7)
+ & unsigned (v8-v15)
+* v16-v29: vectors with INT16 elements, split into signed (v16-v23)
+ & unsigned (v24-v29)