[PD] readsf~ harddisc access [denormals once again]

[Hans-Christoph Steiner]

On Jun 15, 2004, at 2:39 PM, Tim Blechmann wrote:

>>> i'm still experiencing denormal problems with steve harris's ladspa
>>> plugins ...
>>
>> Tom Szilagyi is going through some serious work on his TAP plugins for
>> exactly the same reason. He never tested them on Pentium before.
> developers should have slow machines with big denormal problems ;-)
>
>> What is SuSE's exact position on licenses? Not to open this box one
>> more time for theoretical squabbling, but I wonder if they have
>> cribbed something from the Intel compiler?
> i'm not sure ... maybe they used a commercial compiler...
> it it said, that the intel compiler had some improvements to detect and
> remove denormal numbers, but i've never been able to prove that ... i
> tried several compiler flags without success, the only success i had 
> was
> changing the PD_BADFLOAT macro...
> the best sollution would probably be to rewrite the critical operations
> in assembler for the critical (p4) systems ... using sse 
> instructions...
>
> thomas grill did something like that, but iirc only for altivec and
> visual c, not for gcc (although i don't know the difference between vc
> and gcc) ... when i have too much time, i'll probably look into it...
>

Has anyone tested gcc's -mfpmath=sse2 option in regards to denormals?  
If SSE helps with denormals, it seems like all of Pd should be compiled 
with this option.

.hc

                                     http://at.or.at/hans/


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