Re: [U-Boot-Users] [PATCH] ppc: Added fls, fls64, __ilog2_u64, and ffs64 to bitops

On Jun 11, 2008, at 5:54 AM, Haavard Skinnemoen wrote:

Kumar Gala galak@kernel.crashing.org wrote:

...

+/*

• • fls: find last (most-significant) bit set.
• • Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
• */

+static __inline__ int fls(unsigned int x) +{

• return __ilog2(x) + 1;

+}

__ilog2(0) returns -1?

it does.

- k