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Subject: Re: Begging for assembler FirstOne() and LastOne()

Author: Gerd Isenberg

Date: 03:50:35 05/19/02

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This one don't need conditional jumps:

// precondition: bb not null
__forceinline unsigned int BitSearch(BitBoard bb)
{
	__asm
	{
		bsf		eax,[bb+4]
		xor		eax, 32
		bsf		eax,[bb]
	}
}

__forceinline unsigned int BitSearchReverse(BitBoard bb)
{
	__asm
	{
		bsr		eax,[bb]
		bsr		eax,[bb+4]
		setnz	dl
		shl		dl, 5
		add		al, dl
	}
}

Gerd

• Re: Begging for assembler FirstOne() and LastOne() Matthias Gemuh 05:35:32 05/19/02
  • Re: Begging for assembler FirstOne() and LastOne() Dann Corbit 15:36:50 05/20/02

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