wrote:
For some reason, the pshufb instruction does not work on my
AMD Athlon 64. I tried it in 32 bit mode, and I get an illegal
instruction message from Windows.

According to this:


http://www.amd.com/us-en/Processors/...0,,30_118_9485...


it should support SSE3.


Any ideas why pshufb doesn't work?

Can you post the binary or hex encoding of the pshufb instruction that is
causing the illegal instruction exception?

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