Set cl_amd_media_ops with the BITALIGN flag and allow non-bitselect devices to build.

diakgcn120208.cl

@@ -13,11 +13,12 @@
 	typedef uint u;
 #endif
 
-#ifdef BFI_INT
+#ifdef BITALIGN
 	#pragma OPENCL EXTENSION cl_amd_media_ops : enable
+	#ifdef BFI_INT
 		#define Ch(x, y, z) amd_bytealign(x, y, z)
 		#define Ma(x, y, z) amd_bytealign(z ^ x, y, x)
-#else
+	#else
 		#define Ch(x, y, z) bitselect(z, y, x)
 		#if defined(VECTORS2) || defined(VECTORS4) || defined(VECTORS8)
 			// GCN - VEC2 or VEC4
@@ -26,6 +27,10 @@
 			// GCN - no VEC
 			#define Ma(z, x, y) Ch(z ^ x, y, x)
 		#endif
+	#endif
+#else //BITALIGN
+	#define Ch(x, y, z) (z ^ (x & (y ^ z)))
+	#define Ma(x, y, z) ((x & z) | (y & (x | z)))
 #endif
 
 #ifdef GOFFSET