[pypy-dev] PyPy Assembler SQRT Patch

[Joe]

Attached is a patch to allow pypy to use SQRTSD rather than calling
out to libc.  This resulted in a 2x speedup, that scaled as the
benchmark took longer.
When i added another 0 to the end of the benchmark it was still a 2x speedup.

benchmark results:
http://paste.pocoo.org/show/378122/

I'll be happy to answer any questions about the patch.
Joe
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