Agner`s CPU blog

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New Intel compiler version - still the same!
Author:  Date: 2012-03-14 10:50
I am not sure why Intel used images for that one instance, but their are a number of sites on the Intel web where the announcement is in text format. A quick search for a phrase of the announcement found a number of them in various formats .... PDF, text, image,

I doubt they were hiding anything but it makes good reading.

software.intel.com/sites/products/documentation/hpc/composerxe/en-us/cpp/lin/main/main_welcome.htm

This is not directly related to the compiler but it does raise the issue of potential problems if there is some difference in the way that Intel and others implement new features. They have updated the BOINC project PRIMEGRID to use the AVX instructions introduced on Sandy Bridge and Bulldozer. The code works fine on a Sandy Bridge part but fails on a Bulldozer.

AVX build of llr (20%-50% faster)
www.primegrid.com/forum_thread.php?id=3912

"This has been tested on Intel Sandy Bridge but should also work on AMD Bulldozer [UPDATE] DOES NOT WORK on AMD Bulldozer. Currently, these are the only two CPU's that support AVX. Attention: AVX is supported only after Win7 SP1. WinXP does not have AVX support."


There may be a coding error that trips the AMD Bulldozer implementation of the PRIMEGRID client project but not the Sandy Bridge. If there is that difference, developers will have to be careful when they add support. I think that in this case they are using the gcc compiler.


AMD FX X8 8120 not working with AVX!
www.primegrid.com/forum_thread.php?id=3933

I thought you might be interested.

RJ

 
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