Re: Span-Dependent Instructions (Preston Briggs)
Thu, 3 Jan 91 23:18:45 GMT

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Newsgroups: comp.compilers
From: (Preston Briggs)
Keywords: assembler, optimize
Organization: Rice University, Houston
References: <> <>
Date: Thu, 3 Jan 91 23:18:45 GMT

I wrote:
>Has anyone ever measured the efficacy of any of these algorithms?

and the moderator noted
>[Szymanski's papers have some effectiveness results. His first paper reports
>that in some pile of PDP-11 code, his algorithm shortened considerably more
>branches than the one the assembler used. -John]

Actually, I meant more along the lines of runtime improvements. My personal
speculation is that this whole area is a source of only insignificant
improvements. I could easily be wrong though -- that's why I was wondering
about empirical measurements.

Preston Briggs

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