**URLs**:
-* <https://libre-soc.org/openpower/sv/biginteger/analysis/>
* <https://libre-soc.org/openpower/sv/rfc/ls004/>
-* bigint: <https://bugs.libre-soc.org/show_bug.cgi?id=960> TODO: maybe remove this link due to confusion and irrelevance?
* <https://git.openpower.foundation/isa/PowerISA/issues/91>
* shift-and-add <https://bugs.libre-soc.org/show_bug.cgi?id=968>
* add shaddw: <https://bugs.libre-soc.org/show_bug.cgi?id=996>
to use `int` for array indexing. for additional details see
<https://bugs.libre-soc.org/show_bug.cgi?id=996>.
6. Even Motorola 68000 has LD/ST-Indexed-Shifted <https://tack.sourceforge.net/olddocs/m68020.html#2.2.2.%20Extra%20MC68020%20addressing%20modes>
+7. should average-add also be included? what about CA?
**Changes**