19 Sep
2023
19 Sep
'23
9:50 p.m.
On Tue, Sep 19, 2023 at 11:34 AM Paul Winalski <paul.winalski(a)gmail.com> wrote:
For what it's worth, the VAX had a table-driven
CRC instruction. It
wasn't very popular because on most VAX models it was actually slower
than by-hand coding. It is one of the instructions dropped from the
microVAX instruction set used on all later VAXen, where it was
emulated by the operating system.
I thought that was a general polynomial root finder instruction that
used Horner's Method? Obviously it could be used in CRC calculations,
but I remember it being more general. I also remember reading about it
in the VAX architecture manual and thinking, "wow,
that's...something."
- Dan C.