[RC5] rc5 and 2xPowerPC-RS64-III

Jim C. Nasby jim at nasby.net
Wed Jun 19 16:07:18 EDT 2002

First, RS6000s don't use PowerPC, they use Power CPU. The core is
roughly the same, but the Power CPU is optimized for moving massive
amounts of data (newer CPUs have over 4000 pins).

Scott is correct in that the Power CPU doesn't have critical
instructions needed to do RC5, so it has to emulate them, which is very
costly. If you want to see the RS6000 really shine, compare the OGR
rates; our 4 CPU machine at work gets 24Gn/s.

Jim C. Nasby (aka Decibel!)                    jim at nasby.net
Member: Triangle Fraternity, Sports Car Club of America
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