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- From: titus@dallas.sil.org
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: CISC and RISC
- Message-ID: <1992Dec20.141011.78@dallas.sil.org>
- Date: 20 Dec 92 20:10:11 GMT
- Organization: Summer Institute of Linguistics, Dallas Center
- Lines: 24
-
- Rob McCool mentioned SUN's hardware stuffing NOPs into the
- pre-fetch queue to avoid "stale" data; we encountered that
- sort of problem in a bit-slice machine in a previous job.
- The code was modifying data that had already been
- pre-fetched, and then attempting to act on the contents of
- the data; unfortunately the pre-fetch was not write-through,
- so the programmer had to put NOPs in the code to "stuff" the
- pre-fetch queue (fortunately, only a few bytes--it was an
- 8-bit machine) so that the program would deal with the
- *real* data. ARGGG!!
-
- * * * * * * * * * * * * * * * * *
- Mike Titus, Programmer /\ Summer Institute
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-
- "I can do everything through Him who gives me strength."
-
- Philippians 4:13 (NIV)
-