Author: Walter Faxon
Date: 18:01:05 12/02/02
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On December 02, 2002 at 19:43:15, Gerd Isenberg wrote: <snip> > >Congrats, Walter!! > >10-bit pattern bsf PI2FD btr c LSB_64 >0x0000000011111133 15.3 18.0 19.1 22.8 17.8 >0x1010111010101110 19.7 18.5 19.6 23.4 17.8 >0x1111113300000000 20.6 18.0 19.1 22.8 17.8 > <snip> > >Geniously, sorry Walter, that i overlooked your approach. It is clearly the >fastest of these routines. De Bruijn Sequence? May have a close look to the >constant. > >I'm really impressed. > >Regards, >Gerd Thanks, Gerd. It was based on 32-bit code I wrote in 1992, for the 80386 with its 10+3n clocks on the bsf instruction. Both versions were written without knowledge of De Bruijn. Thank you very much for your public testing. Maybe now the result won't be lost! :) -- Walter
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