diff --git a/src/core/CL/kernels/CLPermuteKernel.cpp b/src/core/CL/kernels/CLPermuteKernel.cpp
index 1636e5a..dc2d6fe 100644
--- a/src/core/CL/kernels/CLPermuteKernel.cpp
+++ b/src/core/CL/kernels/CLPermuteKernel.cpp
@@ -75,16 +75,16 @@
 void CLPermuteKernel::configure(const CLCompileContext &compile_context, const ICLTensor *input, ICLTensor *output, const PermutationVector &perm)
 {
     ARM_COMPUTE_ERROR_ON_NULLPTR(input, output);
+    const TensorShape output_shape = get_output_shape(input->info(), perm);
+    // Output auto inizialitation if not yet initialized
+    auto_init_if_empty(*output->info(), input->info()->clone()->set_tensor_shape(output_shape));
+
     ARM_COMPUTE_ERROR_THROW_ON(validate_arguments(input->info(), output->info(), perm));
 
     _input  = input;
     _output = output;
     _perm   = perm;
 
-    const TensorShape output_shape = get_output_shape(input->info(), perm);
-    // Output auto inizialitation if not yet initialized
-    auto_init_if_empty(*output->info(), input->info()->clone()->set_tensor_shape(output_shape));
-
     // Create kernel
     CLBuildOptions build_opts;
     build_opts.add_option("-DDATA_TYPE=" + get_cl_unsigned_type_from_element_size(data_size_from_type(input->info()->data_type())));
diff --git a/src/core/Helpers.cpp b/src/core/Helpers.cpp
index bfc4a8d..5c7200b 100644
--- a/src/core/Helpers.cpp
+++ b/src/core/Helpers.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2018 Arm Limited.
+ * Copyright (c) 2016-2020 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -23,9 +23,9 @@
  */
 #include "arm_compute/core/Helpers.h"
 
-using namespace arm_compute;
-
-Window arm_compute::calculate_max_window(const ValidRegion &valid_region, const Steps &steps, bool skip_border, BorderSize border_size)
+namespace arm_compute
+{
+Window calculate_max_window(const ValidRegion &valid_region, const Steps &steps, bool skip_border, BorderSize border_size)
 {
     if(!skip_border)
     {
@@ -79,7 +79,7 @@
     return window;
 }
 
-Window arm_compute::calculate_max_enlarged_window(const ValidRegion &valid_region, const Steps &steps, BorderSize border_size)
+Window calculate_max_enlarged_window(const ValidRegion &valid_region, const Steps &steps, BorderSize border_size)
 {
     const Coordinates &anchor = valid_region.anchor;
     const TensorShape &shape  = valid_region.shape;
@@ -128,7 +128,7 @@
     return window;
 }
 
-Window arm_compute::calculate_max_window_horizontal(const ValidRegion &valid_region, const Steps &steps, bool skip_border, BorderSize border_size)
+Window calculate_max_window_horizontal(const ValidRegion &valid_region, const Steps &steps, bool skip_border, BorderSize border_size)
 {
     if(skip_border)
     {
@@ -181,8 +181,8 @@
     return window;
 }
 
-ValidRegion arm_compute::calculate_valid_region_scale(const ITensorInfo &src_info, const TensorShape &dst_shape,
-                                                      InterpolationPolicy interpolate_policy, SamplingPolicy sampling_policy, bool border_undefined)
+ValidRegion calculate_valid_region_scale(const ITensorInfo &src_info, const TensorShape &dst_shape,
+                                         InterpolationPolicy interpolate_policy, SamplingPolicy sampling_policy, bool border_undefined)
 {
     const DataLayout data_layout = src_info.data_layout();
     const int        idx_width   = get_data_layout_dimension_index(data_layout, DataLayoutDimension::WIDTH);
@@ -255,4 +255,20 @@
     valid_region.shape.set(idx_height, std::min<size_t>(valid_end_out_y - valid_start_out_y, dst_shape[idx_height]));
 
     return valid_region;
-}
\ No newline at end of file
+}
+
+PermutationVector get_permutation_vector_from_softmax_axis(size_t actual_axis)
+{
+    switch(actual_axis)
+    {
+        case 1:
+            return PermutationVector(1U, 0U, 2U, 3U);
+        case 2:
+            return PermutationVector(2U, 1U, 0U, 3U);
+        case 3:
+            return PermutationVector(3U, 1U, 2U, 0U);
+        default:
+            ARM_COMPUTE_ERROR("Axis not supported");
+    }
+}
+} // namespace arm_compute
\ No newline at end of file