[PD] Hunting denormals?

[Tim Blechmann]

> Looking into this once again (I've had this problem for 10 years or more
> now) I just found out that gcc has a -ffast-math flag that prevents
> denormals for slowing the code down, as long as the CPU has SSE
> instructions.  I don't know if the geode does or not, though!

according to wikipedia not all geode processors support sse 
instructions ...
the sse unit can be configured to handle denormals as zero, by setting 
the MXCSR control register, no need to rely on specific compiler 
flags ... iirc, i added the specific code to the devel_0_37 a few years 
ago ...

tim

-- 
tim at klingt.org
http://tim.klingt.org

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