Author: Gian-Carlo Pascutto
Date: 17:10:26 08/06/03
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>I'm not familar with GCC. I guess you compared a x86-64 executable running on a >single opteron processor, all sixteen 64-bit gp-registers used, with a x86-32 >executable. Yes. The x86-32 executable has significant amounts of optimized assembly, the AMD64 compile was straight from the reference C code. It compiled directly BTW, no porting issues (unlike Mac OS version!). >A few questions: > >Do you use a lot of 64-bit stuff in Deep Sjeng? Depends on what a lot is :) Deep Sjeng can certainly take advantage of the native 64 bit processing, if that helps you. >Did you use profile guided optimization? Yes. They give a performance gain of 0.8%. -- GCP
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