Re: [linux-audio-dev] Float to int conversions

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Subject: Re: [linux-audio-dev] Float to int conversions
From: Erik de Castro Lopo (erikd_AT_mega-nerd.com)
Date: Thu Nov 01 2001 - 21:06:46 EET

It really blew my mind when "Daniel V." <dvenkita_AT_rand.ss.ecel.uwa.edu.au> said:

> A quick question: have any tests of this code been made with non-x86
> architectures (specifically ppc)? Or did they not have the problem to
> begin with?

I'm stil trying to get access to PPC. Linux on PPC should have lrint/lrintf
so thats not a big issue. I'm much more interested in gettig access to
MacOS.

I did run this on UltraSparc II and could not get any speed improvement in
going from cast -> integer pipeline operations. I still haven't figured out
whether this is because the UltraSparc II has a shallow pipleine wrt i386
or whether the UltraSparc has a specific assembler instruction for float
to int casts. I should also try this on UltraSparc III which I has a deeper
pipeline than USII.

Erik 

-- 
+-----------------------------------------------------------+
  Erik de Castro Lopo  nospam_AT_mega-nerd.com (Yes it's valid)
+-----------------------------------------------------------+
Linux: the only OS that makes you feel guilty when you reboot
    -- Kenneth Crudup in comp.os.linux.misc

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