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This Question Should Be An Easy One
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Louis Zulli



Joined: 08 Jan 2007
Posts: 2147
Location: PA USA
PostPost subject: Re: This Question Should Be An Easy One    Posted: Sat Apr 07, 2012 1:33 pm Reply to topic Reply with quote
geots wrote:
zullil wrote:
geots wrote:
I don't know much, but I know that with this computer i get the benefit of being able to use the SSE or SSE4 executables. And SSE stands for: "If it doesn't crash, use it."

So I know which choice to make there. But what if I am looking at a choice of an exe that says SSE or SSE4.2 and another exe that says Popcnt? I guess that is short for Popcount. But which choice do I make then- SSE or Popcnt? Rolling Eyes


Thanks,

george


Choose the POPCNT exe. Then run it. If it crashes, then your cpu probably doesn't support the POPCNT instruction. But if your cpu supports SSE4.2, it likely supports POPCNT too.



Thanks. I would love to know why popcount is better than SSE4.2- But since I don't know what either one means and it scares the shit out of me to even think about asking, I will just take your word for it and label them:
1.Popcnt.
2.SSE or SSE4.2
3.Normal (when nothing else works)


Thanks again,

george


Technically, the POPCNT instruction is not part of the SSE4.2 instruction set. I don't know if there exists a cpu that supports SSE4.2 but not POPCNT. I also don't know if any true SSE4.2 instruction is useful for chess programming, but my guess is No. I have always assumed that, as far as chess programs are concerned, that SSE4.2 means the engine uses the hardware POPCNT instruction.

In any case, SSE and SSE4.2 are simply additional cpu instructions that offer greater functionality. Not scary in any way.
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Subject Author Date/Time
This Question Should Be An Easy One George Speight Sat Apr 07, 2012 12:42 pm
      Re: This Question Should Be An Easy One Louis Zulli Sat Apr 07, 2012 12:50 pm
            Re: This Question Should Be An Easy One George Speight Sat Apr 07, 2012 1:13 pm
                  Re: This Question Should Be An Easy One Louis Zulli Sat Apr 07, 2012 1:33 pm
                        Re: This Question Should Be An Easy One George Speight Sat Apr 07, 2012 2:13 pm
                              Re: This Question Should Be An Easy One George Speight Sat Apr 07, 2012 2:26 pm
                              Re: This Question Should Be An Easy One jose mē velasco Sat Apr 07, 2012 2:30 pm
                              Re: This Question Should Be An Easy One Louis Zulli Sat Apr 07, 2012 2:48 pm
                                    Re: This Question Should Be An Easy One jose mē velasco Sat Apr 07, 2012 3:09 pm
                                          Re: This Question Should Be An Easy One George Speight Sat Apr 07, 2012 3:26 pm
                                          Re: This Question Should Be An Easy One Louis Zulli Sat Apr 07, 2012 6:38 pm
                                    Re: This Question Should Be An Easy One George Speight Sat Apr 07, 2012 3:23 pm
                                          Re: This Question Should Be An Easy One Louis Zulli Sat Apr 07, 2012 3:45 pm
                        Re: This Question Should Be An Easy One George Speight Sat Apr 07, 2012 2:38 pm
      Re: This Question Should Be An Easy One Vael Jean-Paul Sat Apr 07, 2012 1:14 pm
            Re: This Question Should Be An Easy One George Speight Sat Apr 07, 2012 2:17 pm
      Re: This Question Should Be An Easy One Mike Scheidl Sat Apr 07, 2012 2:09 pm
            Re: This Question Should Be An Easy One George Speight Sat Apr 07, 2012 2:21 pm
                  Re: This Question Should Be An Easy One Mike Scheidl Sat Apr 07, 2012 3:21 pm
                        Re: This Question Should Be An Easy One George Speight Sat Apr 07, 2012 3:25 pm
                              ANOTHER RELATED IMPORTANT QUESTION George Speight Sat Apr 07, 2012 4:47 pm
                                    Re: ANOTHER RELATED IMPORTANT QUESTION E Diaz Sun Apr 08, 2012 8:15 am
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