Pentium Pro and Pentium II bug

Robert Harley (
Sun, 11 May 1997 18:06:46 +0200 (MET DST)

Oops! That last message was all commentary and no URLs...
Check out Intel's ass-covering "specification updates" at and around:

As for all the disclaimers about this being obscure and not affecting
anything: roughly a week ago (before I heard about the bugs) I ran
some C9X validation stuff on my Alpha. Flying colours etc.
Pentium Pro and II fail.

Also my undergrad thesis implemented interval arithmetic in ML and
relied crucially on correct IEEE exception flags. Good thing it was
on a Sparc!

-- Rob.