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Subject: Re: HP gcc switch to settle this whole thing

Author: Dann Corbit

Date: 15:18:39 06/20/02

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On June 20, 2002 at 17:58:20, Tom Kerrigan wrote:

>On June 20, 2002 at 17:42:30, Dann Corbit wrote:
>
>>Do you imagine that this will settle any argument beyond that particular
>>CPU/OS/compiler combination?
>>I don't.
>
>Why not? gcc is gcc. The HP-PA is your standard RISC chip. The OS doesn't
>matter. I don't see why the HP-PA would get more or less of a speedup going to
>64-bit than a MIPS, UltraSparc, POWER, or any other RISC chip.

Compilers will generate *very* different instruction mixes even on the same CPU.

The Intel compiler *destroys* the GCC compiler for floating point on my machine.

Compilers go back and forth.  The GCC 3.1 is very good.  I doubt very much if
there is an RPM available for our HP or MIPS machine for 3.1 (which I have had
problems with anyway -- there are some acute problems with 3.1).  So the
compiler will have to be GCC 2.?.? which will generate some bad assembly.

I would have to download, install, the compiler and also configure crafty for
that machine.  Then bench it to find an answer which I don't think is
meaningful.

Probably, you will have to find someone else to test it.   I might do it if I
happen to come in on the weekend some time.  But I see it as a 4 hour waste of
time.



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