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Why don't -xP compiled programs run on "Barcelona" processors?

dmantione
Beginner
‎06-06-2008 01:15 AM
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Hello,

What functionality in the AMD "Barcelona" processors is missing that prevents -xP compiled programs from running? As far as I know they support SSE3, but the programs still give the well known message:

Fatal Error: This program was not built to run on the processor in your system.
The allowed processors are: Intel Pentium 4 and compatible Intel processors with Streaming SIMD Extensions 3 (SSE3) instruction support.


What is the exact test that the runtime library performs?

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TimP
Honored Contributor III
‎06-06-2008 07:21 AM
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Recent Intel compilers support the -xO switch for SSE3 code on AMD. If you're using an older compiler, but not too old, you should use -xW. SSE3 is unlikely to show an advantage beyond its ability to vectorize COMPLEX. It's true, with so many architecture switches, if you make a random choice it's easy to be wrong, and not easy to make good recommendations.
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