COMPMID-700: Adds CPPPermute function

Change-Id: I8f6adc67f6e6157710fca540f217d70e6f297217
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/111721
Tested-by: BSG Visual Compute Jenkins server to access repositories on http://mpd-gerrit.cambridge.arm.com <bsgcomp@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/arm_compute/core/Helpers.h b/arm_compute/core/Helpers.h
index 13d1f6c99f..1be24e1841 100644
--- a/arm_compute/core/Helpers.h
+++ b/arm_compute/core/Helpers.h
@@ -33,6 +33,7 @@
 #include "arm_compute/core/TensorShape.h"
 #include "arm_compute/core/Types.h"
 #include "arm_compute/core/Window.h"
+#include "arm_compute/core/utils/misc/utility.h"
 
 #include <array>
 #include <cstddef>
@@ -459,6 +460,23 @@ inline Strides compute_strides(const ITensorInfo &info)
     return compute_strides(info, info.element_size());
 }
 
+/** Permutes given Dimensions according to a permutation vector
+ *
+ * @warning Validity of permutation is not checked
+ *
+ * @param[in, out] dimensions Dimensions to permute
+ * @param[in]      perm       Permutation vector
+ */
+template <typename T>
+inline void permute(Dimensions<T> &dimensions, const PermutationVector &perm)
+{
+    auto copy_dimensions = utility::make_array<Dimensions<T>::num_max_dimensions>(dimensions.begin(), dimensions.end());
+    for(unsigned int i = 0; i < perm.num_dimensions(); ++i)
+    {
+        dimensions[i] = copy_dimensions[perm[i]];
+    }
+}
+
 /* Auto initialize the tensor info (shape, number of channels, data type and fixed point position) if the current assignment is empty.
  *
  * @param[in,out] info                 Tensor info used to check and assign.