[RC5] Why is CSC bitslice MMX only?

Ted Carnahan ted at carnahan.com
Sat Dec 18 21:50:30 EST 1999


>The original core (indeed all d.net cores for CSC) are bitslice.  The
>reason the MMX core is twice as fast is that it processes 64 keys per
>instruction vs 32 for the ALU core.


That's strange, because the fastest core pre-MMX for me (P2 400Mhz) was 326
kkeys/s, but after the Bitslice core was released, that jumped to between
950 and 1000 kkeys/s.  So it's obviously more than twice as fast.  Hmmm....

--------------
Ted Carnahan
ted at carnahan.com
http://www.ted.carnahan.com
--------------


--
To unsubscribe, send 'unsubscribe rc5' to majordomo at lists.distributed.net
rc5-digest subscribers replace rc5 with rc5-digest



More information about the rc5 mailing list