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- Path: sparky!uunet!iWarp.intel.com|inews!pima!rrao
- From: rrao@pima.intel.com (Ravi Rao)
- Newsgroups: comp.dsp
- Subject: Re: I860 fft performance
- Message-ID: <12948@inews.intel.com>
- Date: 12 Aug 92 18:51:05 GMT
- References: <713099311.0@halluc.com> <1992Aug6.125445.10704@nntp.nta.no>
- Sender: news@inews.intel.com
- Organization: Intel Corp, Chandler, AZ
- Lines: 29
-
- In article <1992Aug6.125445.10704@nntp.nta.no> hlj@hal.nta.no writes:
- >
- >If the following two conditions are met:
- >
- > 1. All your data occupies less than 8 kbytes (such that all data
- > is in the cache or in registers)
- Obviously, you don't know about the existence of the nex-gen
- 860 which has 16K of data/instr cache. There are some other
- instr enhancements like 'pfld.q' to make use of full b/w.
-
- > 2. Your algorithm is such that it can be implemented in i860
- > pipelined mode (which is awkward to program)
- To get peak performance, you have to program most uP in
- assembly language. There is no doubt that the i860 pipeline
- is hard to follow, but once you get the hang of it, its fairly
- easy..............
-
- >
- >***** hlj@hal.nta.no (Harald Ljo"en) expressing his private opinions ******
-
-
- --
- ____________________________________________________
- Ravi S. Rao
- SP1-82 Intel Corpn, Chandler, AZ
-
- e-mail: rrao@hopi.intel.com, rrao@pima.intel.com
- ____________________________________________________
-
-