62 lines
2.4 KiB
CMake
62 lines
2.4 KiB
CMake
#################################
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# Check for the presence of SSE2.
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#
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# Once done, this will define:
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# - SSE2_SUPPORT_FOUND - the system supports (at least) SSE2.
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#
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# Copyright (c) 2014, Pablo Fernandez Alcantarilla, Jesus Nuevo
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# Copyright (c) 2019, Igalia S.L.
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#
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# Redistribution and use in source and binary forms, with or without modification,
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# are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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#
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# * Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# * Neither the name of the copyright holders nor the names of its contributors
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# may be used to endorse or promote products derived from this software without
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# specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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# SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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# TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
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# WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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set(SSE2_SUPPORT_FOUND FALSE)
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macro(CHECK_FOR_SSE2)
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include(CheckCXXSourceRuns)
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check_cxx_source_runs("
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#include <emmintrin.h>
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int main ()
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{
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__m128d a, b;
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double vals[2] = {0};
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a = _mm_loadu_pd (vals);
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b = _mm_add_pd (a,a);
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_mm_storeu_pd (vals,b);
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return 0;
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}"
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HAVE_SSE2_EXTENSIONS)
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if (COMPILER_IS_GCC_OR_CLANG OR (MSVC AND NOT CMAKE_CL_64))
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if (HAVE_SSE2_EXTENSIONS)
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set(SSE2_SUPPORT_FOUND TRUE)
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message(STATUS "Found SSE2 extensions")
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endif ()
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endif ()
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endmacro(CHECK_FOR_SSE2)
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CHECK_FOR_SSE2()
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