TC adjustments for nscrypt.

ocl.c

@@ -484,20 +484,28 @@ _clState *initCl(unsigned int gpu, char *name, size_t nameSize)
 	} else
 		cgpu->lookup_gap = cgpu->opt_lg;
 
+	// TODO: check if this params can be the same for both scrypt and nscrypt
+	unsigned int sixtyfours = use_nscrypt ? ((cgpu->max_alloc*cgpu->lookup_gap) / (2048*128) / 64 - 1) : (cgpu->max_alloc / 131072 / 64 - 1);
 	if (!cgpu->opt_tc) {
-		unsigned int sixtyfours;
-
-		sixtyfours =  cgpu->max_alloc / 131072 / 64 - 1;
 		cgpu->thread_concurrency = sixtyfours * 64;
 		if (cgpu->shaders && cgpu->thread_concurrency > cgpu->shaders) {
 			cgpu->thread_concurrency -= cgpu->thread_concurrency % cgpu->shaders;
-			if (cgpu->thread_concurrency > cgpu->shaders * 5)
+			size_t tc_limit = cgpu->shaders * use_nscrypt ? 11 : 5;
-				cgpu->thread_concurrency = cgpu->shaders * 5;
+			if (cgpu->thread_concurrency > tc_limit)
+				cgpu->thread_concurrency = tc_limit;
 		}
 		applog(LOG_DEBUG, "GPU %d: selecting thread concurrency of %d", gpu, (int)(cgpu->thread_concurrency));
-	} else
+	} else {
 		cgpu->thread_concurrency = cgpu->opt_tc;
+	}
 
+	// TODO: check if this works with standard scrypt, too
+	if (use_nscrypt) {
+		if (((cgpu->thread_concurrency * (2048*128)) / cgpu->lookup_gap) > cgpu->max_alloc) {
+			cgpu->thread_concurrency = sixtyfours * 64;
+			applog(LOG_INFO, "GPU %d: thread concurrency too high, set to %d", gpu, (int)(cgpu->thread_concurrency));
+		}
+	}
 
 	FILE *binaryfile;
 	size_t *binary_sizes;