Re: Folk Theorem: Assemblers are superior to Compilers

toon@moene.indiv.nluug.nl (Toon Moene)
Thu, 28 Oct 1993 18:39:01 GMT

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Re: Folk Theorem: Assemblers are superior to Compilers amn@ubik.demon.co.uk (1993-10-27)
Re: Folk Theorem: Assemblers are superior to Compilers synaptx!thymus!daveg@uunet.UU.NET (Dave Gillespie) (1993-10-27)
Re: Folk Theorem: Assemblers are superior to Compilers winikoff@munta.cs.mu.OZ.AU (1993-10-28)
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Re: Folk Theorem: Assemblers are superior to Compilers mps@dent.uchicago.edu (1993-10-28)
Re: Folk Theorem: Assemblers are superior to Compilers toon@moene.indiv.nluug.nl (1993-10-28)
Re: Folk Theorem: Assemblers are superior to Compilers raymondc@microsoft.com (1993-10-28)
Re: Folk Theorem: Assemblers are superior to Compilers adk@sun13.SCRI.FSU.EDU (1993-10-29)
Re: Folk Theorem: Assemblers are superior to Compilers elliottm@csulb.edu (1993-10-29)
Re: Folk Theorem: Assemblers are superior to Compilers jvn@fermi.clas.virginia.edu (Julian V. Noble) (1993-10-29)
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[13 later articles]
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Newsgroups: comp.compilers
From: toon@moene.indiv.nluug.nl (Toon Moene)
Keywords: assembler, optimize, performance, comment
Organization: Moene Computational Physics, Amsterdam, The Netherlands
References: 93-10-104
Date: Thu, 28 Oct 1993 18:39:01 GMT

elliottm@csulb.edu (Mike Elliott) writes:


> [I believe that there are compilers which can outdo human coders, but
> I'd be hard-pressed to believe that any of them generate code for the
> 8086. In my personal experience, rewriting C into assembler on an 8086
> gets notably smaller code because humans are better than compilers at
> figuring out what to do with the very irregular '86 register set. -John]


OK, for the x86 line this might be hard, but if you really want to see a
compiler jump through hoops you can't imagine, look at the output of a
BLISS compilation on one of the VMS microfiches - I've done a lot of
MACRO-32 assembler programming, but this compiler beats me hands off at
inventing tricky code sequences.
--
Toon Moene (toon@moene.indiv.nluug.nl)
Until 931110: Kantershof 269, 1104 GN Amsterdam, The Netherlands
Until 931110: Phone: + 31 20 6982029; Fax: + 31 20 6003411
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[I can easily believe it for the Vax, which has nearly uniform registers
and very uniform addressing. The '86 has neither, making it hard to apply
many of the whizzo new optimization techniques. -John]
--


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