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Add vectorisation support (AVX, OpenMP SIMD) #827

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Add vectorisation support (AVX, OpenMP SIMD) #827

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e69b446
Add vectorisation support (AVX, OpenMP SIMD)
toretto-uk Aug 12, 2025
8efd2ca
Update compile_options.yml
toretto-uk Aug 30, 2025
2bc087a
Update CMakeOptions.md
toretto-uk Aug 30, 2025
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2 changes: 2 additions & 0 deletions CMake/HemeLbOptions.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,9 @@ if (CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64")
else()
set(_default_sse3_flag OFF)
endif()
pass_option(HEMELB HEMELB_USE_AVX "Use AVX intrinsics" OFF)
pass_option(HEMELB HEMELB_USE_SSE3 "Use SSE3 intrinsics" ${_default_sse3_flag})
pass_option(HEMELB HEMELB_USE_OPENMP_SIMD "Use OpenMP SIMD" OFF)
pass_option(HEMELB HEMELB_USE_VELOCITY_WEIGHTS_FILE "Use Velocity weights file" OFF)

pass_option(HEMELB HEMELB_SEPARATE_CONCERNS "Communicate for each concern separately" OFF)
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10 changes: 10 additions & 0 deletions Code/CMakeLists.txt
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Expand Up @@ -34,11 +34,21 @@ if(HEMELB_VALIDATE_GEOMETRY)
add_definitions(-DHEMELB_VALIDATE_GEOMETRY)
endif()

if (HEMELB_USE_AVX)
add_definitions(-DHEMELB_USE_AVX)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mavx -mfma")
endif()

if (HEMELB_USE_SSE3)
add_definitions(-DHEMELB_USE_SSE3)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse3")
endif()

if (HEMELB_USE_OPENMP_SIMD)
add_definitions(-DHEMELB_USE_OPENMP_SIMD)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fopenmp")
endif()

if (HEMELB_BUILD_RBC)
add_definitions(-DHEMELB_BUILD_RBC)
endif()
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