[En-Nut-Discussion] AVR vs ARM pgm size

[Ralph Mason]

You should have a look here at the work done by Michale Fisher.

http://www.usbdip.de/en/ethernut2294/index.html

It shows that the arm code is actually *smaller* than the AVR code (with 
Max optimization).

It does show that the required stack space grows somewhat.

Ralph
> Hi All!
>
> The question of program size on the ARM chip was raised in some msg, this is
> what discovered when trying to compile the sample apps (out of the box, no
> changes): 
>  
> I used WinARM-20050209-2.zip and WinAVR-20040720-install.exe, and Ethernut
> 3.9.9
>  
> PGM      AVR size   ARM size
>         .hex file  .hex file
> Events     21k        41k
> TFTP      144k        err
> HTTPD     221k       397k
> Inetq     106k       227k
> Isp2       err        err
> Logtime   133k       268k
> Nutpiper  149k        err
> Playmp3    err        err
> Portdio   105k       226k
> Pppc      125k        err
> Rs232d    109k       238k
> Simple     13k        25k
> Tcps      108k       230k
> Threads    32k        65k
> Timers     29k        54k
> Uart       38k        75k *)
>
> Notes:
> *) after changing _write_P to _write
> "err" means it did not compile. 
> I did not run all these to verify results
>
> And yes, I do know that the .hex file is larger than the "real" binary.
> (about 2.2 time the size as far as I know) but I was just interested in the
> ratio between the AVR and the ARM. From this list, its sufficient for me to
> know its roughly 1:2
>
> Regards
> Ernst
>
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