Re: improving numerical applications performance
Re: improving numerical applications performance
- Subject: Re: improving numerical applications performance
- From: "Edward K.Chew" <email@hidden>
- Date: Tue, 18 May 2004 10:38:50 -0400
On May 18, 2004, at 9:10 AM, Amilcar Meneses Viveros wrote:
Thanks for your comments and suggestions, I'm gonna work on this. I
really
hope that the program can be improved with Altivec.
You can find a large gathering of Altivec programmers at this site, and
it is not a bad idea to join their mailing list:
http://www.simdtech.org/altivec
Also, I strongly recommend you read Ian Ollmann's tutorial before you
get down to coding. (You will find it under Documents at the above
site.)
In another hand, can G5's Altivec unit manage double data?
No, they did not add any new double precision vector instructions to
the PowerPC 970 (a.k.a. G5). Let's see...since Altivec uses 128-bit
registers, the most it could have handled would have been two at a
time. But considering the 970 has twin independent floating-point
units, it should have no problem scheduling two double operations at a
time anyway without any special coding required on your part. (There
is still an advantage to using Altivec for single precision floats, as
it can handle four of those at a time.)
-Ted
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