Re: [Sdcc-user] Optimize PIC code using SDCC

[Mark R. <mar...@gm...>]

On 6/30/06, Richard Latter <ric...@ho...> wrote:
> Hello All,
>
> I have an application which I am writiing for the
> PIC14 range of processors. I have written the
> application in SDCC C. I use the following line:
>
> sdcc -mpic14 -p16f628.c myproc.c
>
> The compiled .asm output seems to be quite bloated and
> the .hex file is about 1200 bytes in length.
>
> I have tried to optimize the code as much as possible,
> but I can only get this down to 820 bytes.
>
> The code is not that complicated <30loc and just seems
> to be a bit big for my application. If I write anymore
> code, I will blow the 1K limit on this!
>
> I have asked a friend to try and compile my application
> using CCS C compiler and the resultant code is only 175
> bytes (optimized version). There seems to be a massive
> difference size of the generated outputs.
>
> I have tried the options --opt-code-size and
> --opt-code-speed, but this seems to make no difference.
>
> Is there any way I can optimize this to be even smaller?
>

Is it possible that a library function is accidentally linked in?

Regards,
Mark
markrages@gmail
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