On Tuesday, 19 May 2015 at 20:41:58 UTC, Brian Schott wrote:
On Tuesday, 19 May 2015 at 20:01:29 UTC, deadalnix wrote:
Have you tried things like :

(x >> bsr(x)) == 1 ?

I have no idea if this is faster or not, but worth trying.

https://issues.dlang.org/show_bug.cgi?id=14380

"If the content source operand is 0, the content of the destination operand is undefined" - This applies to both the bsf and bsr instructions.

Why ain't we generating a tzcnt ?

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