Article View: net.arch
Article #2562Re: C as an aid writing assembler
From: Griff Smith
Date: Thu, 19 Jun 1986 00:54
Date: Thu, 19 Jun 1986 00:54
35 lines
2140 bytes
2140 bytes
[deleted fine, clear comments about the importance of type checking]
> Decent high-level languages ...
> ... can also optimize the code better -- most hand-written
> assembler is not highly optimized, because it's too much work for a human.
Most UNIX system hand-written assembly language is suboptimal because
the programmers haven't learned the coding idioms and/or don't give a
damn. Humans can do a fine job of optimizing assembly language; they
are much better at recognizing special case optimizations that are too
expensive/unlikely to put in an optimizer. My code, when it worked,
was tight and more optimized than I have seen in most compilers. What
usually made my assembly code sub-optimal was the need for
parameterization: I had to MOV a parameterized zero into a register
instead of CLRing it, etc.
I will completely support a paraphrase of Henry's quote: most hand-written
assembler code is incorrect; finding all the inconsistencies is too much
work for a human. I once spent three days finding a "character with a 3
in it" when I intended to declare an "array of 3 characters". Lint would
have found it in 30 seconds.
> --
> Usenet(n): AT&T scheme to earn
> revenue from otherwise-unused Henry Spencer @ U of Toronto Zoology
> late-night phone capacity. {allegra,ihnp4,decvax,pyramid}!utzoo!henry
Keep that revenue coming, folks. Thank you for using AT&T.
--
Griff Smith AT&T (Bell Laboratories), Murray Hill
Phone: (201) 582-7736
UUCP: {allegra|ihnp4}!ulysses!ggs
Internet: ggs@ulysses.uucp
Technical Details
Message-ID:
<1303@ulysses.UUCP>Path:
arc1-ca.pugleaf.net!utzoo!watmath!clyde!burl!ulysses!ggsReferences:
<201@pyuxv.UUCP> <3700003@uiucdcsp> <6814@utzoo.UUCP>Show Full Headers
Complete Article Headers
Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site ulysses.UUCP Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!burl!ulysses!ggs From: ggs@ulysses.UUCP (Griff Smith) Newsgroups: net.arch,net.lang Subject: Re: C as an aid writing assembler Message-ID: <1303@ulysses.UUCP> Date: Wed, 18-Jun-86 20:54:12 EDT Article-I.D.: ulysses.1303 Posted: Wed Jun 18 20:54:12 1986 Date-Received: Thu, 19-Jun-86 19:56:52 EDT References: <201@pyuxv.UUCP> <3700003@uiucdcsp> <6814@utzoo.UUCP> Organization: AT&T Bell Laboratories, Murray Hill Lines: 35