ClickHouse/cmake/test_cpu.cmake

# https://software.intel.com/sites/landingpage/IntrinsicsGuide/

include (CheckCXXSourceCompiles)

# gcc -dM -E -mno-sse2 - < /dev/null | sort > gcc-dump-nosse2
# gcc -dM -E -msse2 - < /dev/null | sort > gcc-dump-sse2
#define __SSE2__ 1
#define __SSE2_MATH__ 1

# gcc -dM -E -msse4.1 - < /dev/null | sort > gcc-dump-sse41
#define __SSE4_1__ 1

set (TEST_FLAG "-msse4.1")
set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG}")
check_cxx_source_compiles("
	#include <smmintrin.h>
	int main() {
		_mm_insert_epi8(__m128i(), 0, 0);
		return 0;
	}
" HAVE_SSE41)
if (HAVE_SSE41)
	set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
endif ()


# gcc -dM -E -msse4.2 - < /dev/null | sort > gcc-dump-sse42
#define __SSE4_2__ 1

set (TEST_FLAG "-msse4.2")
set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG}")
check_cxx_source_compiles("
	#include <nmmintrin.h>
	int main() {
		_mm_crc32_u64(0, 0);
		return 0;
	}
" HAVE_SSE42)
if (HAVE_SSE42)
	set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
endif ()


# gcc -dM -E -mpopcnt - < /dev/null | sort > gcc-dump-popcnt
#define __POPCNT__ 1

set (TEST_FLAG "-mpopcnt")

set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG}")
check_cxx_source_compiles("
	int main() {
		__builtin_popcountll(0);
		return 0;
	}
" HAVE_POPCNT)

if (HAVE_POPCNT AND NOT AARCH64)
	set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
endif ()

set (CMAKE_REQUIRED_FLAGS "")

# TODO: add here sse3 test if you want use it