IVGCVSW-4128 Add Signed32 to supported input types for Ref ArgMinMax

 * Enabled RefLayerTests for Signed32

Signed-off-by: Francis Murtagh <francis.murtagh@arm.com>
Change-Id: Idbe6fb7607c7e44a8df560b55f28c64a4c4286cd
diff --git a/src/backends/reference/test/RefLayerTests.cpp b/src/backends/reference/test/RefLayerTests.cpp
index c5986e0..a397e93 100644
--- a/src/backends/reference/test/RefLayerTests.cpp
+++ b/src/backends/reference/test/RefLayerTests.cpp
@@ -1116,6 +1116,13 @@
 ARMNN_AUTO_TEST_CASE(ArgMaxHeightFloat32, ArgMaxHeightTest<DataType::Float32>)
 ARMNN_AUTO_TEST_CASE(ArgMinWidthFloat32, ArgMinWidthTest<DataType::Float32>)
 
+ARMNN_AUTO_TEST_CASE(ArgMaxSigned32, ArgMaxSimpleTest<DataType::Signed32>)
+ARMNN_AUTO_TEST_CASE(ArgMinSigned32, ArgMinSimpleTest<DataType::Signed32>)
+ARMNN_AUTO_TEST_CASE(ArgMinChannelSigned32, ArgMinChannelTest<DataType::Signed32>)
+ARMNN_AUTO_TEST_CASE(ArgMaxChannelSigned32, ArgMaxChannelTest<DataType::Signed32>)
+ARMNN_AUTO_TEST_CASE(ArgMaxHeightSigned32, ArgMaxHeightTest<DataType::Signed32>)
+ARMNN_AUTO_TEST_CASE(ArgMinWidthSigned32, ArgMinWidthTest<DataType::Signed32>)
+
 ARMNN_AUTO_TEST_CASE(ArgMaxSimpleQuantisedAsymm8, ArgMaxSimpleTest<DataType::QuantisedAsymm8>)
 ARMNN_AUTO_TEST_CASE(ArgMinSimpleQuantisedAsymm8, ArgMinSimpleTest<DataType::QuantisedAsymm8>)
 ARMNN_AUTO_TEST_CASE(ArgMinChannelQuantisedAsymm8, ArgMinChannelTest<DataType::QuantisedAsymm8>)