Author: Dann Corbit
Date: 14:22:29 02/18/04
Go up one level in this thread
On February 17, 2004 at 20:47:37, Robert Hyatt wrote: [snip] >I can at least answer that question. _Every_ time I have compared the asm to >any C implementation of those functions, the asm has won _every_ time. In >Crafty. I'll mention that for PopCnt() my bitboards are sparsely populated when >I do a PopCnt(). I have _never_ found any C code that will out-perform the old >X86.s code. My new inlinex86.h stuff is not the most efficient because I did it >in a hurry, but it is actually a bit faster because it inlines with dynamic >register names... > >I have dumped the old X86.s completely now, since the inline asm is faster. Maybe it is worth another measurement. I would also be interested to know what the speed difference is when you use inline assembly or not with the AMD64 CPU.
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