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You are here: MacNN Forums > Enthusiast Zone > Classic Macs and Mac OS > Altivec Extensions in MacOS 9.1

Altivec Extensions in MacOS 9.1
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Dedicated MacNNer
Join Date: Dec 1999
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Jan 10, 2001, 08:33 PM
 
Last night, I did a clean install of MacOS 9.1. I didn't have a 9.1 install CD so I just installed 9.0 and updated to 9.1. Then today, I was reading the developer's technotes on the new G4s and I read about the Altivec extensions that came with them. I went to the Extensions Manager to see if they had been updated and I couldn't find them! I searched with Sherlock and opened the 9.1 Tome file, but they were nowhere to be seen. Does anyone have any insights on this? I can certainly extract them from the 9.0 and 9.0.4 installers, but 9.1 may have never versions. Thanks.

Lucian
     
Phaedrus
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Jan 11, 2001, 02:25 AM
 
Same here.

Missing are:

vBasicOps
vBigNum
vectorOps
vMathLib

Maybe Apple incorporated them into the new nanokernal?


     
Dedicated MacNNer
Join Date: Mar 2000
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Jan 11, 2001, 05:40 PM
 
They are in the nanokernel now, if you run a 9.0.4 vs. a 9.1 machine using AltiVec operations you'll notice that the 9.1 machine does them even faster!

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Grizzled Veteran
Join Date: Mar 2000
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Jan 11, 2001, 09:53 PM
 
Correct, the four Altivec extensions are now rolled into the code of the System itself.
     
gizzard  (op)
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Jan 12, 2001, 12:57 AM
 
Thanks for your help guys.

Lucian
     
eucci
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Jan 13, 2001, 11:15 AM
 

There's also vDSP, the "virtual-DSP" library which takes massive advantage of AltiVec.

(It really amazes me to see the difference in iTunes ripping\encoding between my 400mhz G3 iMac at home and the 400mhz (single processor) G4 at work).

More megahertz myth.
     
Mac Enthusiast
Join Date: May 1999
Location: Green Bay, WI USA
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Jan 13, 2001, 01:43 PM
 
According to posts at www.xlr8yourmac.com if you were to install those altivec extensions on top of 9.1, your machine will actually run slower.

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