[fpc-devel] Successful implementation of inline support forpure assembler routines on x86

[Ben Grasset]

Inlining of pure assembler functions would actually be immediately,
specifically useful to me! I've been having a go at improving FPC scores on
"BenchmarksGames", and was so far successful with Binary Trees simple by
throwing a really good threading library at it, however, there are some
benchmarks that simply can't be fixed without either proper intrinsics or
user-specifiable inlinable ASM methods. I have a working re-implmentation
of NBody (that is just a direct rewrite of the Rust implementation) where
I've implemented __m128 and __m128d as records with static nostackframe
assembler "class functions", however it's just not fast enough to be
competitive due to the inability to inline any of the assembler methods.

Something along these lines is absolutely sorely lacking in FPC currently,
don't let anyone tell you otherwise.

On Sat, Mar 16, 2019 at 6:03 PM J. Gareth Moreton <gareth at moreton-family.com>
wrote:

> Of course, my worry now is that we've submitted so many patches and issues
> that we'll just be building an ever-growing back-log that may never be
> cleared.  It also depends on what Florian's own vision for the future of
> Free Pascal is, I think.
>
> Gareth aka. Kit
>
>
>
> On Sat 16/03/19 17:05 , "J. Gareth Moreton" gareth at moreton-family.com
> sent:
>
> Normally Florian or another administrator will say if the patch has been
> applied and mark the ticket as "resolved" if they're happy.  Once they are
> added I will have a play around.
>
> Admittedly one thing I'm also waiting on is the node XML dump feature (
> https://bugs.freepascal.org/view.php?id=35017 ), since that will allow me
> to see how procedures are constructed at the intermediate level, plus I
> sort of need it in order to work out what's going on with
> https://bugs.freepascal.org/view.php?id=32913 , something I've vowed to
> fix but has been sitting dormant for ages now - I'll have to apologise to
> David Hawk (the reporter) afterwards.
>
> Gareth aka. Kit
>
>
>
> On Sat 16/03/19 16:07 , Ryan Joseph ryan at thealchemistguild.com sent:
>
>
>
> > On Mar 15, 2019, at 9:37 AM, Sven Barth via fpc-devel <
> fpc-devel at lists.freepascal.org> wrote:
> >
> > That could maybe be managed once the support for constants as parameter
> for generics is added (note: I don't know right now how SHUFPS works, so
> take the following as pseudo code):
> >
>
> I fixed the patch for constants in generics and uploaded again (
> https://bugs.freepascal.org/view.php?id=35140). Not sure if they added it
> yet or they were waiting for my to fix things. Let me know if that patch is
> in the correct format so I can fix the other one for multi-helpers.
>
> Regards,
> Ryan Joseph
>
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