-| reg num | Lane 0 | Lane 1 | Lane 2 | Lane 3 |
-| ------- | ------ | ------ | ------ | ------ |
-| r0 | (31.0) | (31.0) | (31.0) | (31.0) |
-| r1 | (31.0) | (31.0) | (31.0) | (31.0) |
-| r2 | (31.0) | (31.0) | (31.0) | (31.0) |
+| | reg | Lane 0 | Lane 1 | Lane 2 | Lane 3 |
+| -- | --- | ------ | ------ | ------ | ------ |
+| | reg | 31..0 | 31..0 | 31..0 | 31..0 |
+| | rs1 | x1 | x2 | x3 | x4 |
+| + | rs2 | y1 | y2 | y3 | y4 |
+| -> | rd | x1+y1 | x2+y2 | x3+y3 | x4+y4 |