HAL universal intrinsics tests and documentation

modules/hal/include/opencv2/hal.hpp

@@ -49,10 +49,21 @@
 
 /**
   @defgroup hal Hardware Acceleration Layer
+  @{
+    @defgroup hal_intrin Universal intrinsics
+    @{
+      @defgroup hal_intrin_impl Private implementation helpers
+    @}
+    @defgroup hal_utils Platform-dependent utils
+  @}
 */
 
+
 namespace cv { namespace hal {
 
+//! @addtogroup hal
+//! @{
+
 namespace Error {
 
 enum
@@ -93,6 +104,8 @@ void sqrt(const double* src, double* dst, int len);
 void invSqrt(const float* src, float* dst, int len);
 void invSqrt(const double* src, double* dst, int len);
 
+//! @}
+
 }} //cv::hal
 
 #endif //__OPENCV_HAL_HPP__