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Re: Strange results with -mfpmath=sse

From: dominiq at lps dot ens dot fr (Dominique Dhumieres)
To: dominiq at lps dot ens dot fr, arjen dot markus895 at gmail dot com
Cc: fortran at gcc dot gnu dot org
Date: Sun, 03 May 2009 13:24:03 +0200
Subject: Re: Strange results with -mfpmath=sse
References: <20090501112632.DA0633BAB9@mailhost.lps.ens.fr> <5b37dace0905010439j3d26892p1d26756846e95c0d@mail.gmail.com> <5b37dace0905010442u4a0acc48l1f26b0931fc879a0@mail.gmail.com>

On i686-apple-darwin9 whatever the options I tried,
even -mfpmath=387 -mno-sse -march=pentium2, I always get:

           1   1.0000000000000000     
...
          19   1.0000000000000000     
          20   0.0000000000000000     
...
          38   0.0000000000000000     
          39                       NaN
...
          50                       NaN

I remember having read something about i686-apple-darwin9 avoiding
the x87 legacy. Note that I consider it as a feature and not a bug!-)

Cheers

Dominique

References:
- Re: Strange results with -mfpmath=sse
  - From: Dominique Dhumieres
- Re: Strange results with -mfpmath=sse
  - From: Arjen Markus
- Re: Strange results with -mfpmath=sse
  - From: Arjen Markus

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