+
+/**
+ * device type
+ */
+
+#define DEVICE_TYPE_CPU 2
+#define DEVICE_TYPE_GPU 4
+#define DEVICE_TYPE_ACCEL 8
+
+#if DEVICE_TYPE == DEVICE_TYPE_CPU
+#define IS_CPU
+#elif DEVICE_TYPE == DEVICE_TYPE_GPU
+#define IS_GPU
+#elif DEVICE_TYPE == DEVICE_TYPE_ACCEL
+#define IS_ACCEL