Author: Vincent Diepeveen
Date: 05:00:26 10/01/02
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On October 01, 2002 at 02:16:34, emerson tan wrote: >Does 64 bit architecture have any benefit on chess programs? If it does, how >much faster is it compared to 32 bit programs? there is basically 2 types of chess programs nowadays - bitboards - non-bitboards Obviously the bitboard programs will profit. We can guess from alpha specs that it's about 33% profit. For the non-bitboarders other things are more interesting. Such as in random order: - is the L1 cache bigger - is the BTB (branch target buffer or branch prediction table) bigger - is the cpu higher clocked - does the cpu have more registers - does the compiler support generating instructions that remove branches - does the cpu do more instructions a clock, or bigger bundles A default compile from DIEP at an Itanium2/McKinley for example it is 33% faster at it than it is at a K7 at the same clock. That's *very* good. Obviously it's a mixture of Level caches and especially doing bundles of 6 instructions a clock. Obviously bitboarders profit even more from this mckinley. It's a great supercomputer CPU!
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