[LAD] Floating point Denormals: C++ and Waf

Martin Homuth-Rosemann linuxaudio at cryptomys.de
Fri Aug 3 07:40:27 UTC 2012

David Robillard-4 wrote:
> Branch per sample, eeck...
> -dr

Yes - but as this reverb is inside the realtime emulation of an electronic
(vox continental) or electromechanical (hammond) organ where I do hundreds
of operations and a lot of branches to create each little sample these few
more branches don't make a difference. 
OTOH my connie project should be a toolbox to check out different approaches
to solve one problem on different platforms. The first solution was to add
1e-20 - but hey this is only a quick hack and we're done.
As I wanted to learn something from struggling with dsp algos my next try
was the processor support for denormals - but this wasn't available in older
PIII without sse2 so I created a diy daz. The test showed no big impact on
cpu usage compared with the 1e-20 solution so I was happy. :)

Ciao, Martin
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