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Subject: Re: Differences between 0x88 ,10x12 and Bitboards!?

Author: Robert Hyatt

Date: 11:11:18 11/19/02

On November 19, 2002 at 12:25:11, Gian-Carlo Pascutto wrote:

>On November 19, 2002 at 11:35:24, Robert Hyatt wrote:
>
>>Bitboards have a bit of a performance advantage on 64 bit processors,
>
>Proof?
>
>--
>GCP

Counter-proof?

Seems intuitively obvious to me.  Bitmaps seem to suffer _no_ performance
penalty on
X86 with 32 bits, compared to 0x88.  Seems intuitively obvious to me that they
will pick
up speed on a machine that does 64 bit operations.

Bruce and I did this comparison when he used the alpha in the WMCCC (1997 I
think).

He re-compiled ferret for the alpha, did the same for Crafty.  My speed
improvement was
significantly better than his on the _same_ machine.  Because of the 64 bit
stuff.  His program
didn't need any 64 bit stuff so it was wasted...

Best "proof" is to try it.  I have...

Re: Differences between 0x88 ,10x12 and Bitboards!? Vincent Diepeveen 11:24:04 11/19/02
- Re: Differences between 0x88 ,10x12 and Bitboards!? Robert Hyatt 11:34:21 11/19/02
  - significant math Vincent Diepeveen 12:04:15 11/19/02
    - Re: significant math Robert Hyatt 13:09:47 11/19/02
    - Re: significant math Russell Reagan 12:15:56 11/19/02
      - Re: significant math Gian-Carlo Pascutto 12:37:24 11/19/02
        
        Re: significant math Russell Reagan 13:08:58 11/19/02
        
        Re: significant math Gian-Carlo Pascutto 13:18:48 11/19/02
        
        Re: significant math Sune Fischer 02:05:25 11/20/02
        
        Re: significant math Steffan Westcott 02:37:43 11/20/02
        
        Re: significant math Sune Fischer 02:44:10 11/20/02
        
        Re: significant math Robert Hyatt 07:57:01 11/20/02
        
        Re: significant math Sune Fischer 08:07:32 11/20/02
        
        Re: significant math Robert Hyatt 08:15:17 11/20/02
        
        Re: significant math Sune Fischer 08:39:14 11/20/02
        
        Re: significant math Steffan Westcott 13:52:38 11/20/02
        
        Re: significant math Sune Fischer 14:58:33 11/20/02
        
        Re: significant math Steffan Westcott 15:58:54 11/20/02
        
        Re: significant math Robert Hyatt 11:11:57 11/20/02
        
        Re: significant math Steffan Westcott 04:13:51 11/20/02
        
        Re: significant math Sune Fischer 04:35:46 11/20/02
        
        Re: significant math Steffan Westcott 06:37:11 11/20/02
        
        Re: significant math Gerd Isenberg 12:17:57 11/20/02
        
        Re: significant math Steffan Westcott 15:15:49 11/20/02
        
        Re: significant math Gerd Isenberg 23:32:50 11/20/02
        
        Natural move generation with bitboards (was Re:significant math) Alessandro Damiani 09:55:07 11/20/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Steffan Westcott 14:57:12 11/20/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Alessandro Damiani 02:55:59 11/21/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Steffan Westcott 03:47:24 11/21/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Alessandro Damiani 12:23:55 11/21/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Steffan Westcott 16:17:46 11/21/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Alessandro Damiani 23:49:05 11/21/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Gerd Isenberg 04:42:51 11/22/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Alessandro Damiani 08:53:54 11/22/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Sune Fischer 08:37:56 11/22/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Gerd Isenberg 10:20:35 11/22/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Sune Fischer 13:17:29 11/22/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Alessandro Damiani 08:58:34 11/22/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Sune Fischer 09:19:42 11/22/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Alessandro Damiani 09:52:54 11/22/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Steffan Westcott 16:08:27 11/22/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Alessandro Damiani 16:44:52 11/22/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Steffan Westcott 17:19:09 11/22/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Sune Fischer 10:38:50 11/22/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Alessandro Damiani 11:01:19 11/22/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Alessandro Damiani 00:24:24 11/22/02
        
        Re: Natural move generation with bitboards (was Re:significant math) Daniel Clausen 03:55:11 11/21/02
        
        Re: significant math Russell Reagan 13:27:31 11/19/02
        
        Re: significant math Robert Hyatt 13:30:28 11/19/02
        
        Re: significant math Gian-Carlo Pascutto 13:29:49 11/19/02
        
        Re: significant math Dan Andersson 13:14:07 11/19/02
        
        Re: significant math Russell Reagan 13:22:14 11/19/02
        
        Re: significant math Dan Andersson 20:54:40 11/19/02
        
        Re: significant math Robert Hyatt 22:06:34 11/19/02
        
        Re: significant math Dan Andersson 01:00:20 11/20/02
        
        Re: significant math Robert Hyatt 07:59:33 11/20/02
        
        Re: significant math Dan Andersson 13:52:11 11/20/02
        
        Re: significant math Robert Hyatt 15:34:35 11/20/02
        
        Re: significant math Sune Fischer 14:37:08 11/20/02
        
        Re: significant math Vincent Diepeveen 21:00:13 11/21/02
        
        Re: significant math Sune Fischer 03:24:41 11/22/02
        
        Re: significant math Uri Blass 22:50:38 11/19/02
        
        Re: significant math Robert Hyatt 08:01:29 11/20/02
        
        Re: significant math Uri Blass 22:52:20 11/19/02
        
        Re: significant math Gian-Carlo Pascutto 13:24:36 11/19/02
        
        Re: significant math Robert Hyatt 13:31:33 11/19/02
        
        Re: significant math Gian-Carlo Pascutto 13:33:40 11/19/02
        
        Re: significant math Robert Hyatt 13:42:21 11/19/02
        
        Re: significant math Gian-Carlo Pascutto 13:51:35 11/19/02
        
        Re: significant math Robert Hyatt 13:53:48 11/19/02
        
        Re: significant math Eugene Nalimov 14:15:46 11/19/02
        
        Re: significant math Gian-Carlo Pascutto 13:59:29 11/19/02
        
        Re: significant math Robert Hyatt 15:03:28 11/19/02
        
        Re: ftp news Robert Hyatt 15:37:42 11/20/02
        
        Re: ftp news Robert Hyatt 15:36:58 11/20/02
        
        Re: significant math Eugene Nalimov 14:16:28 11/19/02
        
        Re: significant math Russell Reagan 13:38:03 11/19/02
        
        Re: significant math Robert Hyatt 13:43:31 11/19/02
        
        Re: significant math Russell Reagan 13:31:15 11/19/02
        
        Re: significant math Alessandro Damiani 13:55:55 11/19/02
        
        Re: significant math Vincent Diepeveen 16:13:39 11/19/02
        
        Re: significant math Jeremiah Penery 17:23:11 11/19/02
        
        Re: significant math Alessandro Damiani 00:44:20 11/20/02
        
        Re: significant math Robert Hyatt 08:02:55 11/20/02
        
        Re: significant math Russell Reagan 17:09:11 11/19/02
        
        Re: significant math Uri Blass 17:35:18 11/19/02
        
        Re: significant math Russell Reagan 19:24:36 11/19/02
        
        Re: significant math Robert Hyatt 17:06:00 11/19/02
        
        Re: significant math Gian-Carlo Pascutto 13:38:37 11/19/02
        
        Re: significant math Robert Hyatt 13:51:36 11/19/02
        
        Re: significant math Gian-Carlo Pascutto 13:56:35 11/19/02
        
        Re: significant math Gerd Isenberg 14:25:26 11/19/02
        
        Re: significant math Bob Durrett 13:37:33 11/19/02
Re: Differences between 0x88 ,10x12 and Bitboards!? Gian-Carlo Pascutto 11:17:42 11/19/02
- Re: Differences between 0x88 ,10x12 and Bitboards!? Robert Hyatt 11:27:26 11/19/02
  - Re: Differences between 0x88 ,10x12 and Bitboards!? Gian-Carlo Pascutto 11:33:53 11/19/02
    - Re: Differences between 0x88 ,10x12 and Bitboards!? Russell Reagan 11:53:45 11/19/02
      - Re: Differences between 0x88 ,10x12 and Bitboards!? Gian-Carlo Pascutto 11:56:27 11/19/02
        
        Re: Differences between 0x88 ,10x12 and Bitboards!? Robert Hyatt 13:07:08 11/19/02
        
        Re: Differences between 0x88 ,10x12 and Bitboards!? Gian-Carlo Pascutto 13:18:01 11/19/02
        
        Re: Differences between 0x88 ,10x12 and Bitboards!? Russell Reagan 13:34:46 11/19/02
        
        Re: Differences between 0x88 ,10x12 and Bitboards!? Gian-Carlo Pascutto 13:36:23 11/19/02
        
        Re: Differences between 0x88 ,10x12 and Bitboards!? Robert Hyatt 13:48:55 11/19/02
        
        Re: Differences between 0x88 ,10x12 and Bitboards!? Anthony Cozzie 23:11:03 11/19/02
        
        Re: Differences between 0x88 ,10x12 and Bitboards!? Robert Hyatt 08:04:27 11/20/02
        
        Re: Differences between 0x88 ,10x12 and Bitboards!? Dave Gomboc 21:07:35 11/19/02
        
        Re: Differences between 0x88 ,10x12 and Bitboards!? Robert Hyatt 22:09:44 11/19/02
        
        Re: Differences between 0x88 ,10x12 and Bitboards!? Gian-Carlo Pascutto 14:07:41 11/19/02
        
        Re: Differences between 0x88 ,10x12 and Bitboards!? Robert Hyatt 20:13:33 11/19/02
        
        Re: Differences between 0x88 ,10x12 and Bitboards!? Russell Reagan 13:39:54 11/19/02
        
        Re: Differences between 0x88 ,10x12 and Bitboards!? Robert Hyatt 13:27:34 11/19/02
        
        Re: Differences between 0x88 ,10x12 and Bitboards!? Russell Reagan 12:17:32 11/19/02
    - Re: Differences between 0x88 ,10x12 and Bitboards!? Robert Hyatt 11:38:43 11/19/02

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