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From: email@example.com (chris)
Subject: Re: To C or not to C
Date: 4 Jan 2003 09:17:58 -0800
NNTP-Posting-Date: 4 Jan 2003 17:17:58 GMT
"Michael Culley" wrote in message news:<firstname.lastname@example.org>...
> Thanks to everyone's help here my small project has progressed well. I now
> had a completed (although very messy) prototype. For those who didn't read
> my previous thread it is using an 8051 and a max232 to connect to a serial
> port. I'm doing this project with a friend and he prefers to use C while I
> prefer to use assembler. We have both written the software and both versions
> work the same with only minor differences. I can see 2 problems with using
> C. First, there is alot of extra assembly code added in that we don't know
> what it does, if this produces a bug it could be hard to track down. Second,
> it appears to use alot more of the rom. The assembler version is 757 bytes
> and the C version is 1508 bytes. About 350 bytes is text in both, so the C
> code is almost 3 times larger than the assembler version. The C version has
> had quite a few hours spent on it getting it down to 1500 bytes where the
> assembler version hasn't been optimised. 1500 bytes seams like a huge waste
> when we only have 2k.
> What does everyone think, which is better C or assembler? We are using SDCC.
Hi, only a 3:1 increase count yourself lucky it's usually much worse
than that. As for all the "extra unused code" people keep going on
about, your compiler should not add any code that you do not use. I
personally have yet to see an instance where its worth running C on an
8051. As you have done the job both ways you should be able to measure
the performance diffences for yourself and make your own judgement.
the 8051 is an assembly programers dream, easy instuctions simple and
straight forward, if you were trying it on a pentium that would be a
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