Run unit tests and determinism check on ARM using QEMU (#201)

.github/workflows/determinism_check.yml

@@ -27,9 +27,9 @@ jobs:
     - name: Checkout Code
       uses: actions/checkout@v2
     - name: Configure CMake
-      run: cmake -B ${{github.workspace}}/Build/Linux_Distribution -DCMAKE_BUILD_TYPE=Distribution Build -DCROSS_PLATFORM_DETERMINISTIC=ON -DTARGET_VIEWER=OFF -DTARGET_SAMPLES=OFF -DTARGET_HELLO_WORLD=OFF -DTARGET_UNIT_TESTS=OFF
+      run: cmake -B ${{github.workspace}}/Build/Linux_Distribution -DCMAKE_BUILD_TYPE=Distribution -DCMAKE_CXX_COMPILER=clang++ Build -DCROSS_PLATFORM_DETERMINISTIC=ON -DTARGET_VIEWER=OFF -DTARGET_SAMPLES=OFF -DTARGET_HELLO_WORLD=OFF -DTARGET_UNIT_TESTS=OFF
     - name: Build
-      run: cmake --build ${{github.workspace}}/Build/Linux_Distribution --config Distribution
+      run: cmake --build ${{github.workspace}}/Build/Linux_Distribution
     - name: Test ConvexVsMesh
       working-directory: ${{github.workspace}}/Build/Linux_Distribution
       run: ./PerformanceTest -q=LinearCast -t=2 -s=ConvexVsMesh -validate_hash=${CONVEX_VS_MESH_HASH}
@@ -67,10 +67,32 @@ jobs:
     - name: Configure CMake
       run: cmake -B ${{github.workspace}}/Build/Linux_Distribution -DCMAKE_BUILD_TYPE=Distribution Build -DCROSS_PLATFORM_DETERMINISTIC=ON -DTARGET_VIEWER=OFF -DTARGET_SAMPLES=OFF -DTARGET_HELLO_WORLD=OFF -DTARGET_UNIT_TESTS=OFF -DUSE_AVX2=OFF -DUSE_AVX512=OFF -DUSE_LZCNT=OFF -DUSE_TZCNT=OFF
     - name: Build
-      run: cmake --build ${{github.workspace}}/Build/Linux_Distribution --config Distribution
+      run: cmake --build ${{github.workspace}}/Build/Linux_Distribution
     - name: Test ConvexVsMesh
       working-directory: ${{github.workspace}}/Build/Linux_Distribution
       run: ./PerformanceTest -q=LinearCast -t=2 -s=ConvexVsMesh -validate_hash=${CONVEX_VS_MESH_HASH}
     - name: Test Ragdoll
       working-directory: ${{github.workspace}}/Build/Linux_Distribution
       run: ./PerformanceTest -q=LinearCast -t=2 -s=Ragdoll -validate_hash=${RAGDOLL_HASH}
+
+  arm:
+    runs-on: ubuntu-22.04
+    name: ARM Determinism Check
+    steps:
+    - name: Checkout Code
+      uses: actions/checkout@v2
+    - name: Install Cross Compiler
+      run: sudo apt-get install gcc-11-aarch64-linux-gnu gcc-11-multilib g++-11-multilib libstdc++-11-dev-arm64-cross qemu-user -y
+    - name: Configure CMake
+      run: cmake -B ${{github.workspace}}/Build/Linux_Distribution -DCMAKE_BUILD_TYPE=Distribution -DCMAKE_CXX_COMPILER=clang++ Build -DCROSS_PLATFORM_DETERMINISTIC=ON -DCROSS_COMPILE_ARM=ON -DTARGET_VIEWER=OFF -DTARGET_SAMPLES=OFF -DTARGET_HELLO_WORLD=OFF -DTARGET_UNIT_TESTS=ON
+    - name: Build
+      run: cmake --build ${{github.workspace}}/Build/Linux_Distribution
+    - name: Test
+      working-directory: ${{github.workspace}}/Build/Linux_Distribution
+      run: qemu-aarch64 -L /usr/aarch64-linux-gnu/ ./UnitTests
+    - name: Test ConvexVsMesh
+      working-directory: ${{github.workspace}}/Build/Linux_Distribution
+      run: qemu-aarch64 -L /usr/aarch64-linux-gnu/ ./PerformanceTest -q=LinearCast -t=2 -s=ConvexVsMesh -validate_hash=${CONVEX_VS_MESH_HASH}
+    - name: Test Ragdoll
+      working-directory: ${{github.workspace}}/Build/Linux_Distribution
+      run: qemu-aarch64 -L /usr/aarch64-linux-gnu/ ./PerformanceTest -q=LinearCast -t=2 -s=Ragdoll -validate_hash=${RAGDOLL_HASH}

Build/CMakeLists.txt

@@ -12,6 +12,9 @@ option(TARGET_VIEWER "Build JoltViewer" ON)
 # When turning this option on, the library will be compiled in such a way to attempt to keep the simulation deterministic across platforms
 option(CROSS_PLATFORM_DETERMINISTIC "Cross platform deterministic" OFF)
 
+# When turning this option on, the library will be compiled for ARM (aarch64-linux-gnu), requires compiling with clang
+option(CROSS_COMPILE_ARM "Cross compile to aarch64-linux-gnu" OFF)
+
 # Select X86 processor features to use (if everything is off it will be SSE2 compatible)
 option(USE_SSE4_1 "Enable SSE4.1" ON)
 option(USE_SSE4_2 "Enable SSE4.2" ON)
@@ -138,7 +141,9 @@ elseif ("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux" OR "${CMAKE_SYSTEM_NAME}" STREQU
 	endif()
 
 	# Platform specific compiler flags
-	if ("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "x86_64" OR "${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "AMD64")
+	if (CROSS_COMPILE_ARM)
+		set(CMAKE_CXX_FLAGS "--target=aarch64-linux-gnu ${CMAKE_CXX_FLAGS}")
+	elseif ("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "x86_64" OR "${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "AMD64")
 		# X64
 		if (USE_AVX512)
 			set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mavx512f -mavx512vl -mavx512dq -mavx2 -mbmi -mpopcnt -mlzcnt -mf16c")