[ardour-dev] sse optimizations

Sampo Savolainen v2 at iki.fi
Mon Jan 30 00:52:44 PST 2006

Quoting Jesse Chappell <jesse at essej.net>:

> On 1/29/06, John Rigg <ardev at sound-man.co.uk> wrote:
> > On Sun, Jan 29, 2006 at 01:50:38AM +0000, John Rigg wrote:
> > > The  reduction in CPU load isn't quite as dramatic as on x86 32-bit
> > > (not too surprising as the x86_64 ABI makes greater use of CPU
> registers).
> > > I'll put together a patch in the next day or two so others can try
> it.
> >
> > Here's a link to the patch (it's a little too large for the list):
> >
> > http://www.sound-man.co.uk/linuxaudio/ardour/ardour-sse64-patch-0.99
> I would like to commit sse64 support to CVS but it appears that this
> patch replaces all 32 bit instructions with the 64bit alternatives. 
> Does this imply that the resulting code will *not* work on 32 bit
> systems?  If so, we need to split these into separate routines and
> bind them appropriately on init, as if it was a different platform.

Yes. We need to make the build process switch between the sse32 and sse64
bit .s files.


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