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fix: disable ENABLE_MULTITARGET_CODE for SSE2 builds

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Robert Schulze 2022-09-07 10:01:51 +00:00
parent bf8fed8be8
commit c07f234f09
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1 changed files with 8 additions and 0 deletions
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8
src/CMakeLists.txt
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@ -42,6 +42,14 @@ endif ()
# See `src/Common/TargetSpecific.h`
option(ENABLE_MULTITARGET_CODE "Enable platform-dependent code" ON)
if (NO_SSE3_OR_HIGHER)
# Optimized x86 code in DECLARE_*_SPECIFIC_CODE blocks (see `src/Common/TargetSpecific.h`) is sometimes marked FORCE_INLINE. As a
# result, its instruction set requirements (e.g. SSE4.2) leak into generic code. This is normally not a problem for standard x86 builds
# because generic code is compiled with SSE 4.2 anyways. But it breaks SSE2-only builds. Therefore disabling the multitarget code
# machinery and always use generic code. (The cleaner alternative is removing FORCE_INLINE but that impacts performance too much.)
set(ENABLE_MULTITARGET_CODE OFF)
endif()
if (ENABLE_MULTITARGET_CODE)
add_definitions(-DENABLE_MULTITARGET_CODE=1)
else()