[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

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