Automatic testing of avx512 hierarchy based on arch description

Author: serge-sans-paille

test/CMakeLists.txt

@@ -208,6 +208,7 @@ if (XSIMD_ENABLE_WERROR)
 endif()
 
 add_subdirectory(doc)
+add_subdirectory(architectures)
 
 if(EMSCRIPTEN)
     set_target_properties(test_xsimd PROPERTIES LINK_FLAGS "-s MODULARIZE=1 -s EXPORT_NAME=test_xsimd_wasm -s WASM=1 -s ALLOW_MEMORY_GROWTH=1 -lembind")

test/architectures/CMakeLists.txt

@@ -0,0 +1,22 @@
+set(INTEL_PROCESSORS
+    knl knm skylake-avx512 cannonlake icelake-client
+    icelake-server cascadelake cooperlake tigerlake sapphirerapids alderlake
+    rocketlake graniterapids graniterapids-d znver4)
+set(CMAKE_CXX_FLAGS "")
+
+foreach(INTEL_PROCESSOR ${INTEL_PROCESSORS})
+    check_cxx_compiler_flag(-march=${INTEL_PROCESSOR} FLAG_SUPPORTED_${INTEL_PROCESSOR})
+    if(FLAG_SUPPORTED_${INTEL_PROCESSOR})
+        message(STATUS ${INTEL_PROCESSOR})
+        add_library(test_${INTEL_PROCESSOR} OBJECT dummy.cpp)
+        target_compile_options(test_${INTEL_PROCESSOR} PRIVATE -march=${INTEL_PROCESSOR})
+        target_include_directories(test_${INTEL_PROCESSOR} PRIVATE ${XSIMD_INCLUDE_DIR})
+        add_dependencies(xtest test_${INTEL_PROCESSOR})
+        if(ENABLE_XTL_COMPLEX)
+            target_compile_features(test_${INTEL_PROCESSOR} PRIVATE cxx_std_14)
+            target_compile_definitions(test_${INTEL_PROCESSOR} PRIVATE XSIMD_ENABLE_XTL_COMPLEX=1)
+            target_link_libraries(test_${INTEL_PROCESSOR} PRIVATE xtl)
+        endif()
+    endif()
+endforeach()
+

test/architectures/dummy.cpp

@@ -0,0 +1,7 @@
+#include <xsimd/xsimd.hpp>
+
+// Basic check: can we instantiate a batch for the given compiler flags?
+xsimd::batch<int> come_and_get_some(xsimd::batch<int> x, xsimd::batch<int> y)
+{
+    return x + y;
+}