AVX on Cygwin

[Achim Gratz]

Corinna Vinschen writes:
>> I hope this affects 64 bit only?

I don't know if it would even be possible to run AVX code from 32bit,
but yes, the three reports so far have been from 64bit systems.

> Btw., for the time being it might be prudent to disable AVX in gmp...

There is no configure option for that when producing a fat binary.  I
guess the GMP folks didn't test it on Cygwin on a system where that code
is actually used.  Haswell and IvyBridge also use some AVX bits, but
apparently nothing that bugs out (or nobody has found it yet).


Regards,
Achim.
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