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- Newsgroups: comp.arch
- Path: sparky!uunet!moliere!pmk
- From: pmk@moliere.uucp (Peter Michael Klausler)
- Subject: Re: 64 bit Alpha AXP -vs- 32 bit computers
- Message-ID: <1992Nov18.152940.5851@moliere.uucp>
- Organization: Lilydale DFL Refreshments Committee & Rhythm Section
- References: <1992Nov17.162014.6506@chpc.utexas.edu> <BxvEJw.6Bu@rice.edu>
- Date: Wed, 18 Nov 1992 15:29:40 GMT
- Lines: 10
-
- In article <BxvEJw.6Bu@rice.edu> preston@miranda.cs.rice.edu (Preston Briggs)
- writes:
- >
- >Another nice use is to speed up bit-wise computation.
- >For example, many compilers do lots of data-flow analysis,
- >summarizing results in long bit vectors; say, O(1000) bit chunks.
- >It's surely faster to AND and OR these things 64 bits at a time,
- >not to mention the reduced fetches from cache.
-
- It's even more fun to use real vector registers for those bit vectors.
-