[PATCH 1/3] r600: add span support for 2D tiling

[Brian Paul]

Alex Deucher wrote:
> On Thu, May 27, 2010 at 10:55 AM, Matt Turner <mattst88 at gmail.com> wrote:
>>> +static inline GLint r600_log2(GLint n)
>>> +{
>>> +       GLint log2 = 0;
>>> +
>>> +       while (n >>= 1)
>>> +               ++log2;
>>> +       return log2;
>>> +}
>> Does mesa not provide something like this?
> 
> The only one I could find was a gallium utility function.

There's a logbase2() function in teximage.c but it might not be 
equivalent.

-Brian