[fpc-pascal] issue when enabling -O2

[Matias Vara]

After fixing the assembler code and other issues, e.g., interruption
handlers were not restoring all registers, I observed an speed up of ~12%
with -O2 when running a simple webserver example. That's very impresive!

Thanks for you help, Matias.

2018-01-10 18:19 GMT+01:00 Matias Vara <matiasevara at gmail.com>:

>
> 2018-01-10 18:09 GMT+01:00 Karoly Balogh (Charlie/SGR) <
> charlie at scenergy.dfmk.hu>:
>
>> Hi,
>>
>> On Wed, 10 Jan 2018, Matias Vara wrote:
>>
>> > BTW, this only applies to inline assembler functions rigth? In the case
>> > of normal procedures that contains a block asm end; there is no problem,
>> > Am I right?
>>
>> No, it applies to *ALL* assembler code. Also inline blocks. The only
>> difference is, for blocks you can hint the compiler which registers you
>> use, so the compiler can also tailor code which improves the interaction
>> with your assembler code:
>>
>> https://www.freepascal.org/docs-html/ref/refse87.html
>>
>> This is not true for pure assembler functions tho', for performance
>> reasons among others.
>>
>> Charlie
>>
>
> This is very interesting.
>
> Thanks a lot.
>
>
>
>> _______________________________________________
>> fpc-pascal maillist  -  fpc-pascal at lists.freepascal.org
>> http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
>>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freepascal.org/pipermail/fpc-pascal/attachments/20180111/24036c9f/attachment.html>