Mersenne: Re: Alpha DS20 timings.

1999-08-19 Thread Steinar H. Gunderson
On Wed, Aug 18, 1999 at 11:10:55PM +0100, Brian J. Beesley wrote: I find my 21164LX-533 runs code compiled from C source with an Alpha version of gcc about 4x as fast as an Intel PII-350 runs the same code compiled with an Intel version of the same mark of the same compiler. Note that gcc is

RE: Mersenne: Re: Alpha DS20 timings.

1999-08-19 Thread Aaron Blosser
Note that gcc is currently not very good for Intel chips (I think PentiumGCC - http://www.goof.com/pcg/ fixes some problems there, but it introduces more bugs), since it assumes that you have many registers. Which 80x86s don't have :-( (Wish there was a way to program P6 microcode directly!

RE: Merced (was Re: Mersenne: Re: Alpha DS20 timings.)

1999-08-19 Thread Willmore, David
From: Simon Burge [SMTP:[EMAIL PROTECTED]] From what I understand of Merced, compiler technology is going to be the problem. It's probably not unreasonable to expect large performance increases as the intelligence of compilers (especially the "free" compilers like gcc and egcs) catches up

RE: Merced (was Re: Mersenne: Re: Alpha DS20 timings.)

1999-08-19 Thread Aaron Blosser
I imagine you could significantly speed up the code by keeping much of the data in register. REG-REG operations take a lot less time than a REG-MEM operation. Should be delicious. From what I understand of Merced, compiler technology is going to be the problem. It's probably not

Re: Merced (was Re: Mersenne: Re: Alpha DS20 timings.)

1999-08-19 Thread John R Pierce
As for the compilers, remember that RISC type architecture is nothing really new...and EPIC type stuff has been around a while. There are already compilers for other systems that contain much of the brains to do the optimizations already...they just need to get those smarts moved over to