-accumulation affect. As the second result location is implicitly defined as the register after the first result (RS=RT+1), the Scalar Register set can be used
-for vector computation.
-Similar to `divdeu`, and has similar advantages to `maddedu`. Modulo result is
-available with the quotient.
+accumulation affect: `RC` effectively becomes a 64-bit carry in chains
+of highly efficient loop-unrolled arbitrary-length big-integer operations.
+Similar to `divdeu`, and has similar advantages to `maddedu`,
+Modulo result is available with the quotient.