mirror of
https://github.com/VectorCamp/vectorscan.git
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55 lines
1.2 KiB
CMake
55 lines
1.2 KiB
CMake
# detect architecture features
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#
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# must be called after determining where compiler intrinsics are defined
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if (HAVE_C_X86INTRIN_H)
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set (INTRIN_INC_H "x86intrin.h")
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elseif (HAVE_C_INTRIN_H)
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set (INTRIN_INC_H "intrin.h")
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else ()
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message (FATAL_ERROR "No intrinsics header found")
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endif ()
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set (CMAKE_REQUIRED_FLAGS "${CMAKE_C_FLAGS} ${EXTRA_C_FLAGS} ${ARCH_C_FLAGS}")
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# ensure we have the minimum of SSSE3 - call a SSSE3 intrinsic
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CHECK_C_SOURCE_COMPILES("#include <${INTRIN_INC_H}>
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int main() {
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__m128i a = _mm_set1_epi8(1);
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(void)_mm_shuffle_epi8(a, a);
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}" HAVE_SSSE3)
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# now look for AVX2
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CHECK_C_SOURCE_COMPILES("#include <${INTRIN_INC_H}>
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#if !defined(__AVX2__)
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#error no avx2
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#endif
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int main(){
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__m256i z = _mm256_setzero_si256();
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(void)_mm256_xor_si256(z, z);
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}" HAVE_AVX2)
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if (NOT HAVE_AVX2)
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message(STATUS "Building without AVX2 support")
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endif ()
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# and now for AVX512
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CHECK_C_SOURCE_COMPILES("#include <${INTRIN_INC_H}>
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#if !defined(__AVX512BW__)
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#error no avx512bw
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#endif
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int main(){
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__m512i z = _mm512_setzero_si512();
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(void)_mm512_abs_epi8(z);
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}" HAVE_AVX512)
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if (NOT HAVE_AVX512)
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message(STATUS "Building without AVX512 support")
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endif ()
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unset (CMAKE_REQUIRED_FLAGS)
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unset (INTRIN_INC_H)
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