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From: pete@valid.UUCP (Pete Zakel)
Newsgroups: net.micro.amiga,net.lang.c
Subject: Re: printf() code size using Astartup.obj and AMIGA.LIB only
Message-ID: <421@valid.UUCP>
Date: Wed, 9-Jul-86 20:37:39 EDT
Article-I.D.: valid.421
Posted: Wed Jul  9 20:37:39 1986
Date-Received: Fri, 11-Jul-86 06:15:13 EDT
References: <8606270438.AA07486@pavepaws> <426@oscvax.UUCP> <84@unisoft.UUCP> <566@3comvax.UUCP> <1385@well.UUCP> <951@jade.BERKELEY.EDU>
Organization: Valid Logic, San Jose, CA
Lines: 12
Xref: watmath net.micro.amiga:3908 net.lang.c:9801

> >>causes var to be first loaded, extended to a word, extended to a long, then
> >>compared against 0, EVEN when var is declared as a UBYTE...
> 
> What's the second extend doing in there? Anything claiming to be a
> reasonable compiler should generate ONE extend.

Not if the processer is a 68000 or 68010.  There is NO instruction to extend
byte to long.  Fortunately that was fixed in the 68020, but that doesn't help
unless you have a compiler that understands 68020 AND you know all your
target machines have 68020s.
-- 
-Pete Zakel (..!{hplabs,amd,pyramid,ihnp4}!pesnta!valid!pete)