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Re: [f-cpu] Re: Navier-Stokes

On Thu, 18 Apr 2002, Michael Riepe wrote:
>On Thu, Apr 18, 2002 at 10:25:32AM +0200, Juergen Goeritz wrote:
>> >However, the LSU hints are not "portable" and not accessible from
>> >portable C code. Intrinsics or macros are probably necessary,
>> >but it's as ugly as using MMX intrinsics in C code, so go figure...
>> >But if a compiler is "smart" (?) enough, it should do the job.
>> >This goes along with the same process that is used to globally
>> >allocate the registers, because program-wise statistics (and even
>> >profiling) are necessary to set the good flags at the right place.
>> Jo, jo. But there ain't no PD compilers around that could
>> do the job, are there? The gcc 2stage profiling optimization
>> features are not thaaat convenient to use for global...
>gcc (I suppose you mean 3.0.x) doesn't optimize globally, and the
>profiling feature only has an effect on branch prediction.

I know this ;) what I wanted to say is that it also
will hardly be adapted to the global optimization scheme
required for f-cpu.


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