Author: Vincent Diepeveen
Date: 08:24:40 10/04/02
Go up one level in this thread
On October 03, 2002 at 14:50:23, Bo Persson wrote:
>On October 01, 2002 at 08:19:31, Vincent Diepeveen wrote:
>
>> you need loads of inline assembly for nearly any architecture
>>to keep going and you need a 64 bits processor to not be 2 times slower
>>than a non-bitboarder.
>>
>
>Do you want to see how much asm I need for a bitboard program?
i'm talking about chess at 32 bits processors, not about
some checker program which has 32 squares :)
anyway how many moves a second can you generate after
1.e4,e5 2.d4,d5 :)
>Here it is, in its entirety:
>
> // Assembly helpers
>
>// warning C4035: 'BSR' : no return value
>#pragma warning(disable : 4035)
>
> inline unsigned BSR(unsigned Bits)
> { __asm bsr eax,[Bits] }
>
> inline unsigned BSF(unsigned Bits)
> { __asm bsf eax,[Bits] }
>
>#pragma warning(default : 4035)
>
>
>
>That's it!
>
>
>Bo Persson
>bop2@telia.com
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