COMPMID-3510 [Interface change] Fix definition of "axis" in NESoftmaxLayer and CLSoftmaxLayer

* [Interface change] "axis" argument is renamed to "reduce_end_axis"

* Unify the meaning of "axis"(now "reduce_end_axis") to be the last axis
  of the first n dimensions (inclusive)to reduce.
  This way the meaning of reduce_end_axis stays the same for both
  positive and negative values: it selects a dimension before which all
  dimensions (including the selected dimension) are reduced.

Change-Id: I4ab03bd8360b1cd8cac4998df0b1571064a9d4ed
Signed-off-by: SiCong Li <sicong.li@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3278
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/tests/validation/GLES_COMPUTE/SoftmaxLayer.cpp b/tests/validation/GLES_COMPUTE/SoftmaxLayer.cpp
index 3b55717..50f6a74 100644
--- a/tests/validation/GLES_COMPUTE/SoftmaxLayer.cpp
+++ b/tests/validation/GLES_COMPUTE/SoftmaxLayer.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018 ARM Limited.
+ * Copyright (c) 2017-2020 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -89,7 +89,7 @@
 FIXTURE_DATA_TEST_CASE(RunSmall, GCSoftmaxLayerFixture<half_float::half>, framework::DatasetMode::PRECOMMIT, combine(combine(combine(datasets::SoftmaxLayerSmallShapes(),
                                                                                                                      framework::dataset::make("DataType", DataType::F16)),
                                                                                                                      framework::dataset::make("Beta", 1.0f)),
-                                                                                                                     framework::dataset::make("Axis", 1)))
+                                                                                                                     framework::dataset::make("ReduceEndAxis", 0)))
 {
     // Validate output
     validate(GCAccessor(_target), _reference, tolerance_f16);
@@ -97,7 +97,7 @@
 FIXTURE_DATA_TEST_CASE(RunLarge, GCSoftmaxLayerFixture<half_float::half>, framework::DatasetMode::NIGHTLY, combine(combine(combine(datasets::SoftmaxLayerLargeShapes(),
                                                                                                                    framework::dataset::make("DataType", DataType::F16)),
                                                                                                                    framework::dataset::make("Beta", 1.0f)),
-                                                                                                                   framework::dataset::make("Axis", 1)))
+                                                                                                                   framework::dataset::make("ReduceEndAxis", 0)))
 {
     // Validate output
     validate(GCAccessor(_target), _reference, tolerance_f16);
@@ -108,7 +108,7 @@
 FIXTURE_DATA_TEST_CASE(RunSmall, GCSoftmaxLayerFixture<float>, framework::DatasetMode::PRECOMMIT, combine(combine(combine(datasets::SoftmaxLayerSmallShapes(),
                                                                                                                   framework::dataset::make("DataType", DataType::F32)),
                                                                                                                   framework::dataset::make("Beta", 1.0f)),
-                                                                                                          framework::dataset::make("Axis", 1)))
+                                                                                                          framework::dataset::make("ReduceEndAxis", 0)))
 {
     // Validate output
     validate(GCAccessor(_target), _reference, tolerance_f32);
@@ -116,7 +116,7 @@
 FIXTURE_DATA_TEST_CASE(RunLarge, GCSoftmaxLayerFixture<float>, framework::DatasetMode::NIGHTLY, combine(combine(combine(datasets::SoftmaxLayerLargeShapes(),
                                                                                                                         framework::dataset::make("DataType", DataType::F32)),
                                                                                                                 framework::dataset::make("Beta", 1.0f)),
-                                                                                                        framework::dataset::make("Axis", 1)))
+                                                                                                        framework::dataset::make("ReduceEndAxis", 0)))
 {
     // Validate output
     validate(GCAccessor(_target), _reference, tolerance_f32);