[fpc-devel] Little feature teaser

[Florian Klaempfl]

Am 03.08.2013 23:31, schrieb Sven Barth:
> On 03.08.2013 22:50, Florian Klämpfl wrote:
>> Am 03.08.2013 17:19, schrieb Sven Barth:
>>> On 03.08.2013 13:12, Florian Klämpfl wrote:
>>>>
>>>>> First, FPC does not loop unrolling by default, you need -Ooloopunroll,
>>>>> second, the loop is relatively long, so let the compiler assume a long
>>>>> pipeline with - Cppentium4
>>>>>
>>>>
>>>> -Oopentium4 it is.
>>>
>>> Are you sure that you don't mean -Oppentium4? The compiler complains
>>> with —Oopentium4. And it doesn't change anything (also with
>>> -Ooloopunroll) :(
>>
>> There was indeed a mistake in optunroll.pas, -Oppentium4 -Ooloopunroll
>> should work now.
>
> Jupp, it indeed works now. Now the compiler would "just" need to detect
> that the for loop is basically only using constants and evaluate that at
> compile time... but that's a wish for another day ;)

I think item 635365 of my todo list, the autovectorizer would solve it ;)