IVGCVSW-3858 Fix RefTensorHandleTests on Raspberry Pi

* Fix alignment check to use sizeof(size_t) instead of a hard-coded value

Signed-off-by: Aron Virginas-Tar <Aron.Virginas-Tar@arm.com>
Change-Id: I092c4464c6cecb2403da9b7744b68ad063ddbad1

2 files changed, 9 insertions, 6 deletions

diff --git a/src/backends/reference/RefTensorHandle.cpp b/src/backends/reference/RefTensorHandle.cpp
index 42ac7f0826..84a74edc1d 100644
--- a/src/backends/reference/RefTensorHandle.cpp
+++ b/src/backends/reference/RefTensorHandle.cpp
@@ -110,8 +110,9 @@ bool RefTensorHandle::Import(void* memory, MemorySource source)
     {
         if (source == MemorySource::Malloc)
         {
-            // Checks the 16 byte memory alignment.
-            if (reinterpret_cast<uint64_t>(memory) % 16)
+            // Check memory alignment
+            constexpr uintptr_t alignment = sizeof(size_t);
+            if (reinterpret_cast<uintptr_t>(memory) % alignment)
             {
                 if (m_Imported)
                 {
diff --git a/src/backends/reference/test/RefTensorHandleTests.cpp b/src/backends/reference/test/RefTensorHandleTests.cpp
index 2c5d6d49ec..be229bf844 100644
--- a/src/backends/reference/test/RefTensorHandleTests.cpp
+++ b/src/backends/reference/test/RefTensorHandleTests.cpp
@@ -92,15 +92,17 @@ BOOST_AUTO_TEST_CASE(MisalignedPointer)
     TensorInfo info({2}, DataType::Float32);
     RefTensorHandle handle(info, memoryManager, static_cast<unsigned int>(MemorySource::Malloc));
 
-    // Allocates a 2 int array
+    // Allocate a 2 int array
     int* testPtr = new int[2];
-    int* misalignedPtr = testPtr + 1;
 
-    BOOST_CHECK(!handle.Import(static_cast<void *>(misalignedPtr), MemorySource::Malloc));
+    // Increment pointer by 1 byte
+    void* misalignedPtr = static_cast<void*>(reinterpret_cast<char*>(testPtr) + 1);
+
+    BOOST_CHECK(!handle.Import(misalignedPtr, MemorySource::Malloc));
 
     delete[] testPtr;
 }
 
 #endif
 
-BOOST_AUTO_TEST_SUITE_END()
\ No newline at end of file
+BOOST_AUTO_TEST_SUITE_END()