Shawn D'Alimonte wrote:
William A. Mahaffey III wrote:
Interesting. I understand the necessity for good code & compilers to achieve speed-of-light performance, I was just asking what the speed-of-light is under AMD64, i.e. are they just a 64-bit version of P3/P4 (2 ticks / FPop) or more like SGI ?
Have you check AMD's web site? They have a whole section of AMD64 manuals (There is an AMD Athlon64 Tech Docs link is on the front page). There is a 5 volume programmers manual under the Opteron section.
I remember flipping through an optimization guide there somewhere but most of it was above my head.
I assume that the FPU is based on the Athlon which I remember being faster than the P4 one.
-- Shawn D'Alimonte shawnd@mycybernet.net
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Yes, that's 1 of the things I don't like about AMD's website, they want you to download 5-volume manuals (usually pdf) & read them offline :-). I was just hoping someone would have an off-the cuff response they would render. I re-read the cpuid site a bit more & I think I may have the answer anyway, thanks.