COMPMID-3694 COMPMID-3695 COMPMID-3458: Softmax Axis

* Properly support "axis" in CL and NEON (and GC) SoftmaxLayer and
LogSoftmaxLayer in accord with mainstream frameworks. Axis now defines
the dimension on which softmax is performed, and supports the range
[-rank, rank)

* Extend validation tests to include valid and invalid axes

* Remove unnecessary LogSoftmaxLayer fixture, as it is only a
specialisation of the SoftmaxLayer fixture

* Change the validation fill value range from [-1000, 1000] to [-10,
10], as the former often results in sparse outputs with a single one and
zeros elsewhere

Change-Id: I8a0040453182b04ed88260de3ba434e98258d863
Signed-off-by: Manuel Bottini <manuel.bottini@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3830
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Reviewed-by: Gian Marco Iodice <gianmarco.iodice@arm.com>
diff --git a/tests/validation/CL/LogSoftmaxLayer.cpp b/tests/validation/CL/LogSoftmaxLayer.cpp
index 15466af..8fdc745 100644
--- a/tests/validation/CL/LogSoftmaxLayer.cpp
+++ b/tests/validation/CL/LogSoftmaxLayer.cpp
@@ -59,7 +59,7 @@
 FIXTURE_DATA_TEST_CASE(RunSmall, CLLogSoftmaxLayerFixture<half>, framework::DatasetMode::ALL, combine(combine(combine(datasets::SoftmaxLayerSmallShapes(),
                                                                                                                       framework::dataset::make("DataType", DataType::F16)),
                                                                                                               framework::dataset::make("Beta", { 1.0f, 2.0f })),
-                                                                                                      framework::dataset::make("Axis", { 0 })))
+                                                                                                      framework::dataset::make("Axis", { 0, -1 })))
 {
     // Validate output
     validate(CLAccessor(_target), _reference, tolerance_f16);
@@ -75,7 +75,7 @@
 FIXTURE_DATA_TEST_CASE(Run4D, CLLogSoftmaxLayerFixture<half>, framework::DatasetMode::NIGHTLY, combine(combine(combine(datasets::SoftmaxLayer4DShapes(),
                                                                                                                        framework::dataset::make("DataType", DataType::F16)),
                                                                                                                framework::dataset::make("Beta", { 1.0f, 2.0f })),
-                                                                                                       framework::dataset::make("Axis", { 0 })))
+                                                                                                       framework::dataset::make("Axis", { 0, -3, 2 })))
 {
     // Validate output
     validate(CLAccessor(_target), _reference, tolerance_f16);
@@ -86,7 +86,7 @@
 FIXTURE_DATA_TEST_CASE(RunSmall, CLLogSoftmaxLayerFixture<float>, framework::DatasetMode::ALL, combine(combine(combine(datasets::SoftmaxLayerSmallShapes(),
                                                                                                                        framework::dataset::make("DataType", DataType::F32)),
                                                                                                                framework::dataset::make("Beta", { 1.0f, 2.0f })),
-                                                                                                       framework::dataset::make("Axis", { 0 })))
+                                                                                                       framework::dataset::make("Axis", { 0, 1 })))
 {
     // Validate output
     validate(CLAccessor(_target), _reference, tolerance_f32);
@@ -99,10 +99,10 @@
     // Validate output
     validate(CLAccessor(_target), _reference, tolerance_f32);
 }
-FIXTURE_DATA_TEST_CASE(Run4D, CLLogSoftmaxLayerFixture<float>, framework::DatasetMode::NIGHTLY, combine(combine(combine(datasets::SoftmaxLayer4DShapes(),
-                                                                                                                        framework::dataset::make("DataType", DataType::F32)),
-                                                                                                                framework::dataset::make("Beta", { 1.0f, 2.0f })),
-                                                                                                        framework::dataset::make("Axis", { 0 })))
+FIXTURE_DATA_TEST_CASE(Run4D, CLLogSoftmaxLayerFixture<float>, framework::DatasetMode::ALL, combine(combine(combine(datasets::SoftmaxLayer4DShapes(),
+                                                                                                                    framework::dataset::make("DataType", DataType::F32)),
+                                                                                                            framework::dataset::make("Beta", { 1.0f, 2.0f })),
+                                                                                                    framework::dataset::make("Axis", { 0, -4, 3 })))
 {
     // Validate output
     validate(CLAccessor(_target), _reference, tolerance_f32);