Re: [Cooker] icc - Optimization

2002-08-30 Thread Gwenole Beauchesne

Austin Acton wrote:

 1.  Does Mandrake plan to use ICC?  No.  It's not gpl, and Mandrake's
 goal is to be 100 0pl.

Or have demos in commercial apps.

 2.  Does ICC have better optimizations than gcc?  Hard to say.  In my
 own experience (computational chemistry), I've found IFC compiled apps
 equal to or slightly slower than gcc.  GCC has very good optimizations
 FOR INTEL.  I dunno about AMD.  As of gcc 2.9, athlon optimizations were
 crappy.  I haven't tried gcc 3.2 yet.

If you have a P4, you can use SSE2 to do fpmath arithmetics.

 Now Intel Fortran compiler is a different story.  It BLOWS away g77!
 Even i686 compiled fortan code on an ATHLON is WAY faster with IFC than
 g77.

The fact is Intel has a Fortran 90 compiler, which gcc currently don't have 
in a decent state for now.

Bye,
Gwenole




[Cooker] icc - Optimization

2002-08-29 Thread Andrea Tavazzani

Is any optimiziation planned for the Intel(R) Compiler.
Thanks

harrison3001







Re: [Cooker] icc - Optimization

2002-08-29 Thread Austin Acton

What do you mean?

1.  Does Mandrake plan to use ICC?  No.  It's not gpl, and Mandrake's
goal is to be 100% gpl.

2.  Does ICC have better optimizations than gcc?  Hard to say.  In my
own experience (computational chemistry), I've found IFC compiled apps
equal to or slightly slower than gcc.  GCC has very good optimizations
FOR INTEL.  I dunno about AMD.  As of gcc 2.9, athlon optimizations were
crappy.  I haven't tried gcc 3.2 yet.
Now Intel Fortran compiler is a different story.  It BLOWS away g77!  
Even i686 compiled fortan code on an ATHLON is WAY faster with IFC than
g77.

3.  Can you recompile Mandrake apps with IFC?  Sure.
4.  Would they be faster binaries than with gcc?  Try it and let us
know.

Austin


On Thu, 2002-08-29 at 22:13, Andrea Tavazzani wrote:
 Is any optimiziation planned for the Intel(R) Compiler.
 Thanks
 
 harrison3001