I'm getting hardware errors on phatk 2.2, didn't get them on diapolo's or 2.1
the three are about undistinguishable in terms of speed for me
Are you using BFI_INT? Of not, there is a bug in the 2.2 kernel, Vince found that in the kernel.cl file, you have to replace
#define Ch(x, y, z) bitselect(x,y,z)
on line 78 with
#define Ch(x, y, z) bitselect(z, y, x)
I haven't gotten around to release a new version, but if you make the change yourself, it should fix it.
-Phateus