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Author Topic: Sam460ex available with AmigaOS 4.1  (Read 26324 times)

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Offline minator

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Re: Sam460ex available with AmigaOS 4.1
« on: January 29, 2011, 04:11:28 PM »
Quote from: lou_dias;610005
Probably but not everything is appropriate for such things.  If Altivec was the be-all-end-all of application performance, don't you think all chips would have it...  

They do.
All desktop processors have some form of vector processors included.
Many of Freescale's embedded chips have vector units (not necessarily AltiVec).

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Fast branch prediction and OoO execution are more generally useful...  Even the GC and Wii have SIMD...can you explain to me how that will make your email download faster?  Surfing?  How does your favorite text editor benefit from SIMD?  It doesn't.  

Do you do search and replace?  spell checking?  They can both be accelerated.

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SIMD has niche use.

Wrong: Look up Libfreevec, it accelerates many basic functions.

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Let's see some real-world benchmarks before denouncing the SAM460...  The G5 Macs only got up to DDR2-533, iirc.  If this board can support DDR2-800 and higher, then real-world benchmarks will get interesting...

They been decidedly unimpressive so far.  No sure why, could be it's not set up right.
« Last Edit: January 29, 2011, 04:13:53 PM by minator »
 

Offline minator

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Re: Sam460ex available with AmigaOS 4.1
« Reply #1 on: January 29, 2011, 04:18:07 PM »
BTW the reason some CPUs don't have vector units it generally cost.  Something like AltiVec is quite big and takes up a lot of silicon.  Cost is king in the embedded world so low end chips don't get it.