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133 lines
4.2 KiB
CMake
133 lines
4.2 KiB
CMake
# https://software.intel.com/sites/landingpage/IntrinsicsGuide/
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include (CheckCXXSourceCompiles)
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include (CMakePushCheckState)
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cmake_push_check_state ()
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# The variables HAVE_* determine if compiler has support for the flag to use the corresponding instruction set.
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# The options ENABLE_* determine if we will tell compiler to actually use the corresponding instruction set if compiler can do it.
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# All of them are unrelated to the instruction set at the host machine
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# (you can compile for newer instruction set on old machines and vice versa).
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option (ENABLE_SSSE3 "Use SSSE3 instructions on x86_64" 1)
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option (ENABLE_SSE41 "Use SSE4.1 instructions on x86_64" 1)
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option (ENABLE_SSE42 "Use SSE4.2 instructions on x86_64" 1)
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option (ENABLE_PCLMULQDQ "Use pclmulqdq instructions on x86_64" 1)
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option (ENABLE_POPCNT "Use popcnt instructions on x86_64" 1)
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option (ENABLE_AVX "Use AVX instructions on x86_64" 0)
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option (ENABLE_AVX2 "Use AVX2 instructions on x86_64" 0)
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option (ARCH_NATIVE "Add -march=native compiler flag. This makes your binaries non-portable but more performant code may be generated. This option overrides ENABLE_* options for specific instruction set. Highly not recommended to use." 0)
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if (ARCH_NATIVE)
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set (COMPILER_FLAGS "${COMPILER_FLAGS} -march=native")
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else ()
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set (TEST_FLAG "-mssse3")
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set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
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check_cxx_source_compiles("
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#include <tmmintrin.h>
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int main() {
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__m64 a = _mm_abs_pi8(__m64());
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(void)a;
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return 0;
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}
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" HAVE_SSSE3)
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if (HAVE_SSSE3 AND ENABLE_SSSE3)
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set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
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endif ()
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set (TEST_FLAG "-msse4.1")
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set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
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check_cxx_source_compiles("
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#include <smmintrin.h>
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int main() {
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auto a = _mm_insert_epi8(__m128i(), 0, 0);
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(void)a;
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return 0;
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}
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" HAVE_SSE41)
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if (HAVE_SSE41 AND ENABLE_SSE41)
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set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
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endif ()
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if (ARCH_PPC64LE)
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set (COMPILER_FLAGS "${COMPILER_FLAGS} -maltivec -D__SSE2__=1 -DNO_WARN_X86_INTRINSICS")
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endif ()
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set (TEST_FLAG "-msse4.2")
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set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
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check_cxx_source_compiles("
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#include <nmmintrin.h>
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int main() {
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auto a = _mm_crc32_u64(0, 0);
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(void)a;
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return 0;
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}
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" HAVE_SSE42)
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if (HAVE_SSE42 AND ENABLE_SSE42)
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set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
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endif ()
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set (TEST_FLAG "-mpclmul")
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set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
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check_cxx_source_compiles("
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#include <wmmintrin.h>
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int main() {
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auto a = _mm_clmulepi64_si128(__m128i(), __m128i(), 0);
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(void)a;
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return 0;
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}
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" HAVE_PCLMULQDQ)
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if (HAVE_PCLMULQDQ AND ENABLE_PCLMULQDQ)
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set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
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endif ()
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set (TEST_FLAG "-mpopcnt")
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set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
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check_cxx_source_compiles("
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int main() {
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auto a = __builtin_popcountll(0);
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(void)a;
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return 0;
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}
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" HAVE_POPCNT)
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if (HAVE_POPCNT AND ENABLE_POPCNT)
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set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
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endif ()
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set (TEST_FLAG "-mavx")
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set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
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check_cxx_source_compiles("
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#include <immintrin.h>
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int main() {
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auto a = _mm256_insert_epi8(__m256i(), 0, 0);
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(void)a;
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return 0;
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}
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" HAVE_AVX)
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if (HAVE_AVX AND ENABLE_AVX)
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set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
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endif ()
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set (TEST_FLAG "-mavx2")
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set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
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check_cxx_source_compiles("
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#include <immintrin.h>
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int main() {
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auto a = _mm256_add_epi16(__m256i(), __m256i());
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(void)a;
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return 0;
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}
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" HAVE_AVX2)
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if (HAVE_AVX2 AND ENABLE_AVX2)
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set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
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endif ()
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endif ()
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cmake_pop_check_state ()
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