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New simple and fast bitboard move generator
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Michael Sherwin



Joined: 26 May 2006
Posts: 2215
Location: OH, USA
PostPost subject: Re: New simple and fast bitboard move generator    Posted: Sun May 06, 2007 10:31 am Reply to topic Reply with quote
Quote:
Is your index unique over all squares or a char-range only per square?


The address of the base of the subtable in which to look up the attack set (or mobility) is meant to be included in at least one of the four lookups. I thought that, that would be best to save a couple instructions. Also I do use structures to hold the information for each square in one place to best utilyze the cash lines. The code I posted was just meant to be simple. However, what I did not think of was breaking it down into smaller chains of instructions that might be better ran in paralell! From examining the assembly it looks as though it all depends on the drag of the memory reads vs that of the imul's and shifts. Thanks!
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Mike
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Display posts from previous:   
Subject Author Date/Time
New simple and fast bitboard move generator Michael Sherwin Sat May 05, 2007 3:52 pm
      Re: New simple and fast bitboard move generator Gerd Isenberg Sat May 05, 2007 5:43 pm
            Re: New simple and fast bitboard move generator Gerd Isenberg Sun May 06, 2007 8:52 am
                  Re: New simple and fast bitboard move generator Michael Sherwin Sun May 06, 2007 10:31 am
                        Re: New simple and fast bitboard move generator Gerd Isenberg Sun May 06, 2007 11:16 am
                              Re: New simple and fast bitboard move generator Michael Sherwin Sun May 06, 2007 1:21 pm
                                    Re: New simple and fast bitboard move generator Gerd Isenberg Sun May 06, 2007 1:52 pm
                                          Re: New simple and fast bitboard move generator Michael Sherwin Sun May 06, 2007 3:15 pm
                              Re: New simple and fast bitboard move generator Michael Sherwin Sun May 06, 2007 10:29 pm
                                    Re: New simple and fast bitboard move generator Gerd Isenberg Mon May 07, 2007 8:40 am
                                          Re: New simple and fast bitboard move generator Michael Sherwin Mon May 07, 2007 11:06 am
                                          Re: New simple and fast bitboard move generator Gerd Isenberg Mon May 07, 2007 8:08 pm
                                                Re: New simple and fast bitboard move generator Gerd Isenberg Mon May 07, 2007 11:22 pm
                                                      Re: New simple and fast bitboard move generator Michael Sherwin Tue May 08, 2007 3:18 am
                                                            Re: New simple and fast bitboard move generator Gerd Isenberg Tue May 08, 2007 6:11 am
                                                Re: New simple and fast bitboard move generator Michael Sherwin Tue May 08, 2007 9:25 pm
                                                      Re: New simple and fast bitboard move generator Michael Sherwin Tue May 08, 2007 10:55 pm
                                                      Re: New simple and fast bitboard move generator Gerd Isenberg Wed May 09, 2007 3:18 am
                                                            Re: New simple and fast bitboard move generator Tony Wed May 09, 2007 6:10 am
                                                                  Re: New simple and fast bitboard move generator Michael Sherwin Wed May 09, 2007 7:47 am
                                                                        Re: New simple and fast bitboard move generator Tony Wed May 09, 2007 8:24 am
                                                      Re: New simple and fast bitboard move generator Gerd Isenberg Wed May 09, 2007 7:31 pm
                                                            Re: New simple and fast bitboard move generator Michael Sherwin Wed May 09, 2007 11:30 pm
            Re: New simple and fast bitboard move generator Tony Mon May 07, 2007 6:46 am
                  Re: New simple and fast bitboard move generator Gerd Isenberg Mon May 07, 2007 8:51 am
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