public static int xFloorLog2(uint x)
{
x |= (x >> 1);
x |= (x >> 2);
x |= (x >> 4);
x |= (x >> 8);
x |= (x >> 16);
return(Bithacks.Ones(x) - 1);
}
public static int CeilingLog2(uint v)
{
int r = Bithacks.FloorLog2(v);
if (r < 0)
{
return(r);
}
if (v != (uint)Bithacks.Power2((uint)r))
{
return(r + 1);
}
else
{
return(r);
}
}