Add in-place calculation support for CL elementwise arithmetic kernels

- Add in-place calculation support in ClArithmeticKernel,  ClSaturatedArithmeticKernel and ClMulKernel
- Add in-place test cases

Resolves: COMPMID-4431

Signed-off-by: Sheri Zhang <sheri.zhang@arm.com>
Change-Id: Id484bdb76b74478a33fedb471ae0c7f799c599f6
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/5885
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: SiCong Li <sicong.li@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/tests/validation/CL/ArithmeticSubtraction.cpp b/tests/validation/CL/ArithmeticSubtraction.cpp
index 00eba7f..6a82471 100644
--- a/tests/validation/CL/ArithmeticSubtraction.cpp
+++ b/tests/validation/CL/ArithmeticSubtraction.cpp
@@ -180,6 +180,17 @@
                        framework::dataset::make("Src0QInfo", { QuantizationInfo(5.f / 255.f, 20) })),
                        framework::dataset::make("Src1QInfo", { QuantizationInfo(2.f / 255.f, 10) })),
                        framework::dataset::make("OutQInfo", { QuantizationInfo(1.f / 255.f, 5) })),
+                       OutOfPlaceDataSet))
+{
+    // Validate output
+    validate(CLAccessor(_target), _reference);
+}
+FIXTURE_DATA_TEST_CASE(RunTinyInPlace, CLArithmeticSubtractionQuantizedFixture<uint8_t>, framework::DatasetMode::PRECOMMIT, combine(combine(combine(combine(combine(combine(datasets::TinyShapes(),
+                       framework::dataset::make("DataType", DataType::QASYMM8)),
+                       framework::dataset::make("ConvertPolicy", { ConvertPolicy::SATURATE })),
+                       framework::dataset::make("Src0QInfo", { QuantizationInfo(5.f / 255.f, 20) })),
+                       framework::dataset::make("Src1QInfo", { QuantizationInfo(5.f / 255.f, 20) })),
+                       framework::dataset::make("OutQInfo", { QuantizationInfo(5.f / 255.f, 20) })),
                        InPlaceDataSet))
 {
     // Validate output
@@ -193,7 +204,7 @@
                        framework::dataset::make("Src0QInfo", { QuantizationInfo(5.f / 255.f, 10) })),
                        framework::dataset::make("Src1QInfo", { QuantizationInfo(2.f / 255.f, 10) })),
                        framework::dataset::make("OutQInfo", { QuantizationInfo(1.f / 255.f, 5) })),
-                       InPlaceDataSet))
+                       OutOfPlaceDataSet))
 {
     // Validate output
     validate(CLAccessor(_target), _reference);
@@ -281,6 +292,16 @@
     // Validate output
     validate(CLAccessor(_target), _reference);
 }
+FIXTURE_DATA_TEST_CASE(RunTinyBroadcastInplace, CLArithmeticSubtractionBroadcastFloatFixture<float>, framework::DatasetMode::PRECOMMIT,
+                       combine(combine(combine(combine(datasets::TinyShapesBroadcastInplace(),
+                                                       framework::dataset::make("DataType", DataType::F32)),
+                                               framework::dataset::make("ConvertPolicy", { ConvertPolicy::SATURATE, ConvertPolicy::WRAP })),
+                                       EmptyActivationFunctionsDataset),
+                               InPlaceDataSet))
+{
+    // Validate output
+    validate(CLAccessor(_target), _reference);
+}
 FIXTURE_DATA_TEST_CASE(RunWithActivationBroadcast, CLArithmeticSubtractionBroadcastFloatFixture<float>, framework::DatasetMode::ALL, combine(combine(combine(combine(datasets::TinyShapesBroadcast(),
                        framework::dataset::make("DataType", DataType::F32)),
                        framework::dataset::make("ConvertPolicy", { ConvertPolicy::SATURATE, ConvertPolicy::WRAP })),