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- Path: EU.net!sun4nl!xs4all!usenet
- From: jtv@xs4all.nl (Jeroen T. Vermeulen)
- Newsgroups: comp.sys.amiga.misc
- Subject: Re: Intel Movie!?
- Date: Fri, 2 Feb 96 03:30:30
- Organization: Leiden University, Mathematics & Computer Science, The Netherlands
- Message-ID: <19960202.7B12650.3728@asd05-06.dial.xs4all.nl>
- References: <19960119.7AF33E0.DA6E@asd01-01.dial.xs4all.nl> <38232136@kone.fipnet.fi>
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-
- In article <38232136@kone.fipnet.fi> "Jyrki Saarinen" <jsaarinen@kone.fipnet.fi> writes:
- >
- > > Better yet (number 2), this news comes just days after the latest big
- > > Intel bug was discovered by Motorola, and Intel had to reduce their
- > >áSPECint92 benchmark ratings by as much as 15% as a result.
- >
- > No wonder - their SPEC ratings have been quite high always.
- >
- > Care to tell more?
-
- Sure. Intel uses beta releases of its compiler to generate their SPEC rates
- (this may be slightly at odds with submission rules BTW) and the version used
- for all P6 submissions from september through december or januari had a bug.
-
- The bug caused the compiler to generate incorrect code when trying to vectorize
- one particular loop in the SPECint92 suite (eqntott). This incorrect code
- *happened* to generate correct results when fed the SPECint92 data set, but did
- it a lot faster by breaking out of an inner loop to early.
-
- As a result the entire average SPECint92 ratings came out 15% too high.
-
-
- > > And while I'm at it (number 3): Has anybody else noticed that some
- > > Pentia also have a bug in the FP *multiply* instruction?
- >
- > Care to tell about this more, too?
-
- Sure. There's a slight inaccuracy in FP multiply with some versions. It's
- already been documented though and is nothing new.
-
- I just thought it was a nice bit of irony.
-
-
- > a Stellar programmer _ //
- > "Amiga - back for the future" \X/
-
- --
- ============================================================================
- # Jeroen T. Vermeulen \"How are we doing kid?"/ Yes, we use Amigas. #
- #--- jtv@xs4all.nl ---\"Oh, same as always."/-- ... --#
- #jvermeul@wi.leidenuniv.nl \ "That bad, huh?" / Got a problem with that? #
-