Author: Gerd Isenberg
Date: 23:28:12 08/09/03
Go up one level in this thread
On August 09, 2003 at 20:38:27, Ricardo Gibert wrote: >On August 09, 2003 at 16:12:28, Gerd Isenberg wrote: > >>On August 08, 2003 at 15:53:00, Eugene Nalimov wrote: >> >>>On August 07, 2003 at 15:40:33, Gerd Isenberg wrote: >>> >>>>... >>>>3. bsf, still vector path and 9 cycles. >>> >>>Hmm, on Itanium2 I can do BSF/BSR equivalent in 8/9 clocks without BSF/BSR >>>instructions: >> >>Hi Eugene, >> >>I see, Itanium2 has popcount, thanks for the lession. >>I refered to opteron's bsf, but anyway, nice lession how to use intrinsics. >>My bitscan collection grows and grows ;-) > > >The word lession is not a word. It is most like the word lesion with one "s": >http://dictionary.reference.com/search?q=lesion >which make what you wrote pretty funny :) i see, a bit awkward ;-) > >I assume this is what you really mean: >http://dictionary.reference.com/search?q=lesson > Yes, i meant Lesson. Thanks for pointing that out. I really have a spelling deficit, and should write more carefully. Gerd > >> >>I'm interested in performance of opterons bsf/btr instructions versus >>Matt Taylor's approach with 64-bit magic de Bruijn multiplication, may be even >>without lookup: >> > >[snip]
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