[Bug target/34682] 70% slowdown with SSE enabled

Mon, 07 Jan 2008 06:10:20 -0800 


------- Comment #7 from ubizjak at gmail dot com  2008-01-07 14:09 -------
Patched gcc:

387:


   FLOPS C Program (Double Precision), V2.0 18 Dec 1992

   Module     Error        RunTime      MFLOPS
                            (usec)
     1     -8.1208e-11      0.0128   1094.6170
     2     -1.5485e-13      0.0061   1145.7086

SSE:

   FLOPS C Program (Double Precision), V2.0 18 Dec 1992

   Module     Error        RunTime      MFLOPS
                            (usec)
     1      4.0146e-13      0.0114   1227.3206
     2     -1.4166e-13      0.0050   1399.9125

   [ 2     -1.4166e-13      0.0269    260.2975 ]

So, 5.36x faster.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34682

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