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if (NOT CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|^i[3,9]86$")
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return()
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endif()
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include(CheckCSourceRuns)
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option(ENABLE_SSE "Enable compile-time SSE4.1 support." ON)
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option(ENABLE_AVX "Enable compile-time AVX support." ON)
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if (ENABLE_SSE)
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#
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# Check compiler for SSE4_1 intrinsics
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#
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if (CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_CLANG )
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set(CMAKE_REQUIRED_FLAGS "-msse4.1")
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check_c_source_runs("
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#include <emmintrin.h>
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#include <smmintrin.h>
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int main()
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{
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__m128i a = _mm_setzero_si128();
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__m128i b = _mm_minpos_epu16(a);
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return 0;
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}"
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HAVE_SSE)
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endif()
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if (HAVE_SSE)
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message(STATUS "SSE4.1 is enabled - target CPU must support it")
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endif()
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if (ENABLE_AVX)
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#
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# Check compiler for AVX intrinsics
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#
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if (CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_CLANG )
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set(CMAKE_REQUIRED_FLAGS "-mavx")
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check_c_source_runs("
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#include <immintrin.h>
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int main()
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{
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__m256i a = _mm256_setzero_si256();
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return 0;
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}"
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HAVE_AVX)
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endif()
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if (HAVE_AVX)
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message(STATUS "AVX is enabled - target CPU must support it")
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endif()
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endif()
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endif()
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mark_as_advanced(HAVE_SSE, HAVE_AVX)
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