Hi Toni, On 6 November 2014 18:29, Toni Mattis <toni.mat...@student.hpi.uni-potsdam.de> wrote: > thanks for the advice. I tried what Armin proposed and like to share my > results with you: > > https://bitbucket.org/amintos/pypy/commits/937254cbc554adfb748e3b5eeb44bf765d204b9d?at=default
Thanks! Maybe instead of manipulating directly the bits (where you have to be extra careful because on 32-bit platforms, regular RPython integers have only 32 bits), you could use math.frexp(). The condition should be "math.frexp(x)[0] == 0.5" or "-0.5". You can then check for denormals by checking that "math.frexp(1.0 / x)[0]" is also 0.5 or -0.5. I think that "x / inf" is always equal to "x * 0.0" (which can be "0.0", "-0.0", or "nan", so it can't be simplified further), but it looks like a useless optimization imho. A bientôt, Armin. _______________________________________________ pypy-dev mailing list pypy-dev@python.org https://mail.python.org/mailman/listinfo/pypy-dev
