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- Path: sparky!uunet!olivea!sgigate!sgi!rhyolite!vjs
- From: vjs@rhyolite.wpd.sgi.com (Vernon Schryver)
- Newsgroups: comp.arch
- Subject: Re: Swap byte instruction - how high is the win?
- Message-ID: <umg4hu8@rhyolite.wpd.sgi.com>
- Date: 10 Jan 93 05:56:50 GMT
- References: <1993Jan7.074052.19620@qb.rhein-main.de> <willmore.726621153@class1.iastate.edu>
- Organization: Silicon Graphics, Inc. Mountain View, CA
- Lines: 14
-
- In article <willmore.726621153@class1.iastate.edu>, willmore@iastate.edu (David Willmore) writes:
- > ...
- > This makes the whole issue of NextStep 486 strange. If the purported
- > reason that NextStep is only supported for the 486 is to sell more 486's
- > then why don't they sell a 386 version with all the bswap's replaced by
- > the long and slow series of 386 instructions which it takes to emulate
- > it?....
-
-
- The sequence of 3 386 instructions for byte-swapping EAX is not very
- long or slow, especially in view of its likely frequency.
-
-
- Vernon Schryver, vjs@sgi.com
-