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improve x86 AVX/SSE detection on *BSD #65

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improve x86 AVX/SSE detection on *BSD #65

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15 changes: 13 additions & 2 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -92,8 +92,19 @@ message(STATUS "Host system arch is: ${CMAKE_SYSTEM_PROCESSOR}")

# Detection of available CPU optimizations
if(NOT DISABLE_CPU_OPTIMIZATION)
if(UNIX AND NOT APPLE)
message(STATUS "Looking for available CPU optimizations on Linux/BSD system...")
if((CMAKE_SYSTEM_NAME STREQUAL "FreeBSD") OR
(CMAKE_SYSTEM_NAME STREQUAL "DragonFly") OR
(CMAKE_SYSTEM_NAME STREQUAL "OpenBSD"))
message(STATUS "Looking for available CPU optimizations on FreeBSD/DragonFlyBSD/OpenBSD system...")
execute_process(COMMAND grep -c "AVX2" /var/run/dmesg.boot
OUTPUT_VARIABLE AVX2_PRESENT)
execute_process(COMMAND grep -c "AVX," /var/run/dmesg.boot
OUTPUT_VARIABLE AVX_PRESENT)
execute_process(COMMAND grep -c "SSE4.1," /var/run/dmesg.boot
OUTPUT_VARIABLE SSE_PRESENT)
# currently AdvSIMD/SIMD (neon) not supported
elseif(UNIX AND NOT APPLE)
message(STATUS "Looking for available CPU optimizations on Linux/NetBSD system...")
execute_process(COMMAND grep -c "avx2" /proc/cpuinfo
OUTPUT_VARIABLE AVX2_PRESENT)
execute_process(COMMAND grep -c "avx " /proc/cpuinfo
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