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automatically detect and enable/disable AVX2 #254

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Merged
shaomeng merged 1 commit into from
Apr 15, 2026
Merged

automatically detect and enable/disable AVX2 #254

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14 changes: 13 additions & 1 deletion CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -32,8 +32,20 @@ option( BUILD_SHARED_LIBS "Build shared SPERR library" ON )
option( BUILD_UNIT_TESTS "Build unit tests using GoogleTest" ON )
option( BUILD_CLI_UTILITIES "Build a set of command line utilities" ON )
option( USE_OMP "Use OpenMP parallelization on 3D volumes" OFF )
option( ENABLE_AVX2 "Enable AVX2 instruction set compilation" ON )
option( SPERR_PREFER_RPATH "Set RPATH; this can fight with package managers so turn off when building for them" ON )

#
# AVX2 auto-detection: default ON for x86, OFF otherwise.
#
if(NOT DEFINED ENABLE_AVX2)
if(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|AMD64|i[3-9]86")
option( ENABLE_AVX2 "Enable AVX2 instruction set compilation" ON )
else()
option( ENABLE_AVX2 "Enable AVX2 instruction set compilation" OFF )
endif()
else()
option( ENABLE_AVX2 "Enable AVX2 instruction set compilation" ${ENABLE_AVX2} )
endif()
mark_as_advanced(FORCE SPERR_PREFER_RPATH)

if(USE_OMP)
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4 changes: 0 additions & 4 deletions src/sperr_helper.cpp
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Expand Up @@ -11,10 +11,6 @@
#include <bit>
#endif

#ifdef __AVX2__
#include <immintrin.h>
#endif

#ifdef USE_OMP
#include <omp.h>
#endif
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6 changes: 0 additions & 6 deletions test_scripts/CMakeLists.txt
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@@ -1,12 +1,6 @@
add_executable( sperr_helper sperr_helper_unit_test.cpp )
target_link_libraries( sperr_helper PUBLIC SPERR GTest::gtest_main )

if(ENABLE_AVX2)
target_compile_options(sperr_helper PRIVATE
"$<$<CXX_COMPILER_ID:MSVC>:/arch:AVX2>"
"$<$<OR:$<CXX_COMPILER_ID:GNU>,$<CXX_COMPILER_ID:Clang>>:-mavx2;-mfma>")
endif()

add_executable( bitstream bitstream_unit_test.cpp )
target_link_libraries( bitstream PUBLIC SPERR GTest::gtest_main )

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