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208 lines
6.9 KiB
CMake
208 lines
6.9 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 (ENABLE_AVX512 "Use AVX512 instructions on x86_64" 0)
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option (ENABLE_AVX512_VBMI "Use AVX512_VBMI instruction on x86_64 (depends on ENABLE_AVX512)" 0)
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option (ENABLE_BMI "Use BMI instructions on x86_64" 0)
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option (ENABLE_AVX2_FOR_SPEC_OP "Use avx2 instructions for specific operations on x86_64" 0)
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option (ENABLE_AVX512_FOR_SPEC_OP "Use avx512 instructions for specific operations 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 "${COMPILER_FLAGS} -march=native")
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elseif (ARCH_AARCH64)
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set (COMPILER_FLAGS "${COMPILER_FLAGS} -march=armv8-a+crc+simd+crypto+dotprod+ssbs")
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elseif (ARCH_PPC64LE)
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# Note that gcc and clang have support for x86 SSE2 intrinsics when building for PowerPC
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set (COMPILER_FLAGS "${COMPILER_FLAGS} -maltivec -mcpu=power8 -D__SSE2__=1 -DNO_WARN_X86_INTRINSICS")
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elseif (ARCH_AMD64)
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set (TEST_FLAG "-mssse3")
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set (CMAKE_REQUIRED_FLAGS "${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} ${TEST_FLAG}")
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endif ()
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set (TEST_FLAG "-msse4.2")
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set (CMAKE_REQUIRED_FLAGS "${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} ${TEST_FLAG}")
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endif ()
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set (TEST_FLAG "-mavx512f -mavx512bw -mavx512vl")
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set (CMAKE_REQUIRED_FLAGS "${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 = _mm512_setzero_epi32();
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(void)a;
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auto b = _mm512_add_epi16(__m512i(), __m512i());
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(void)b;
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auto c = _mm_cmp_epi8_mask(__m128i(), __m128i(), 0);
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(void)c;
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return 0;
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}
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" HAVE_AVX512)
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if (HAVE_AVX512 AND ENABLE_AVX512)
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set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
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endif ()
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set (TEST_FLAG "-mavx512vbmi")
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set (CMAKE_REQUIRED_FLAGS "${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 = _mm512_permutexvar_epi8(__m512i(), __m512i());
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(void)a;
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return 0;
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}
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" HAVE_AVX512_VBMI)
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if (HAVE_AVX512 AND ENABLE_AVX512 AND HAVE_AVX512_VBMI AND ENABLE_AVX512_VBMI)
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set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
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endif ()
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set (TEST_FLAG "-mbmi")
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set (CMAKE_REQUIRED_FLAGS "${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 = _blsr_u32(0);
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(void)a;
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return 0;
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}
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" HAVE_BMI)
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if (HAVE_BMI AND ENABLE_BMI)
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set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
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endif ()
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# Limit avx2/avx512 flag for specific source build
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set (X86_INTRINSICS_FLAGS "")
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if (ENABLE_AVX2_FOR_SPEC_OP)
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if (HAVE_BMI)
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set (X86_INTRINSICS_FLAGS "${X86_INTRINSICS_FLAGS} -mbmi")
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endif ()
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if (HAVE_AVX AND HAVE_AVX2)
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set (X86_INTRINSICS_FLAGS "${X86_INTRINSICS_FLAGS} -mavx -mavx2")
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endif ()
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endif ()
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if (ENABLE_AVX512_FOR_SPEC_OP)
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set (X86_INTRINSICS_FLAGS "")
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if (HAVE_BMI)
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set (X86_INTRINSICS_FLAGS "${X86_INTRINSICS_FLAGS} -mbmi")
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endif ()
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if (HAVE_AVX512)
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set (X86_INTRINSICS_FLAGS "${X86_INTRINSICS_FLAGS} -mavx512f -mavx512bw -mavx512vl -mprefer-vector-width=256")
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endif ()
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endif ()
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else ()
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# RISC-V + exotic platforms
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endif ()
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cmake_pop_check_state ()
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