[pypy-dev] PyPy Assembler SQRT Patch

Maciej Fijalkowski fijall at gmail.com
Tue May 3 13:20:09 CEST 2011


Hi.

Sorry it took so long to review, long weekend and whatnot. The test
for x86 backend actually fails for -1.0 on 64bit. Can you
reproduce/deny?

On Tue, Apr 26, 2011 at 11:51 PM, Joe <qbproger at gmail.com> wrote:
> 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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