[fpc-pascal] issue when enabling -O2
matiasevara at gmail.com
Thu Jan 11 21:33:57 CET 2018
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>:
>> 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:
>> This is not true for pure assembler functions tho', for performance
>> reasons among others.
> This is very interesting.
> Thanks a lot.
>> fpc-pascal maillist - fpc-pascal at lists.freepascal.org
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