Piledriver arch (bdver2) use AMD64 optimizations or C code?

Nate lnxpeng at gmail.com
Fri Oct 10 14:23:34 UTC 2014

I am compiling GMP within the latest version of MinGW on a Windows 7 Pro
machine with a Piledriver CPU (A6-5400B).

Just running "configure" within Msys made GMP 6 compile with "-march=bdver2

As this isn't on the list of GMP specially optimized architectures in the
documentation, is it just compiling from the generic C code? Do I need to
recompile and force the architecture and tuning to AMD64 for best


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