Agreed. Sometimes it is a question of how much should be left to the
compiler and how much should be left to the programmer when it comes to
optimisation.
Gareth aka. Kit
On 02/04/2020 23:42, Sven Barth via fpc-devel wrote:
J. Gareth Moreton <gar...@moreton-family.com
<mailto:gar...@moreton-family.com>> schrieb am Do., 2. Apr. 2020, 22:33:
Hi Jonas,
I brought that up because Florian once asked about just doing
everything
as vectorcall on Win64 because the calling convention, by and
large, is
a compatible extension to its default one. I think issues of
compatibility and third-party interfacing makes it not the best idea
unless there's a way to override it (which you can do by
specifying the
'ms_abi_default' directive, even though that's not the nicest name to
remember!)
I don't think it's a good idea to change the default calling
convention. We'll get many bug reports about third party libraries
then even if it can be changed. The potential performance gain is not
worth it. And those that want to really optimize their code can do so
by adjusting the calling convention either per function or using
$calling.
Regards,
Sven
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