front-end onto SIMD back-end operations, it makes sense to save gates by
allowing the ADD and MUL units to be able to optionally handle a batch
of 8-bit operations, or half the number of 16-bit operations, or a quarter
-of the number of 32-bit operations or just one 64-bit operation. Or,
-it can be used to do two 64-bit multiplications per cycle, or generate
-4 32-bit results, or 8 16-bit results and so on, requiring a lot less gates
-than if they were separate units.
+of the number of 32-bit operations or just one 64-bit operation.
+In this way, a lot less gates are required than if they were separate units.
The unit tests demonstrate that the code that Jacob has written provide
RISC-V mul, mulh, mulhu and mulhsu functionality.