On 10/30/20 14:07, Pekka Paalanen wrote:
> On Wed, 28 Oct 2020 13:06:02 +0300
> Paul Gofman <pgofman@xxxxxxxxxxxxxxx> wrote:
>
>> Signed-off-by: Paul Gofman <pgofman@xxxxxxxxxxxxxxx>
>> ---
>> util_math.h | 3 +++
>> 1 file changed, 3 insertions(+)
>>
>> diff --git a/util_math.h b/util_math.h
>> index e2fa95f5..f6bbe192 100644
>> --- a/util_math.h
>> +++ b/util_math.h
>> @@ -38,6 +38,9 @@ static inline unsigned log2_int(unsigned x)
>> if (x < 2) {
>> return 0;
>> }
>> + if (x & 0x80000000) {
>> + return 31;
>> + }
>> for (l = 2; ; l++) {
>> if ((unsigned)(1 << l) > x) {
>> return l - 1;
> Hi,
>
> I guess that does it, but it seems quite a lot of code that could be
> a two-liner:
> http://graphics.stanford.edu/~seander/bithacks.html#IntegerLogObvious
>
>
> Thanks,
> pq
Hello,
thanks, I've sent the updated patches with simplified implementation.
Regards,
Paul.
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/dri-devel
