[LAD] denormal handling

[Georg Holzmann]

Hallo!

> our experience with ardour has been that DC bias is measurably more
> effective at reducing CPU load than DAZ, FTZ or both combined. DAZ and
> FTZ do both help significantly, however.

One more question: is it not necessary to deactivate DAZ, FTZ again 
after the application (or operation) ?
Or is this done automatically ?
(because I cannot see it e.g. in your ardour code)

Because e.g. in this document: 
http://developer.apple.com/documentation/Performance/Conceptual/Accelerate_sse_migration/migration_sse_translation/chapter_4_section_2.html#//apple_ref/doc/uid/TP40002729-CH248-279676
they set it back afterwards.

Thanks,
LG
Georg