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port: only override __PCLMUL__ on MSVC #13006

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2 changes: 1 addition & 1 deletion port/lang.h
Original file line number Diff line number Diff line change
Expand Up @@ -76,7 +76,7 @@ constexpr bool kMustFreeHeapAllocations = false;

// MSVC doesn't support the same defines that gcc and clang provide
// but does some like __AVX__. Here we can infer some features from others.
#ifdef __AVX__
#ifdef __AVX__ && (_MSC_VER)
#define __SSE4_2__ 1
#define __PCLMUL__ 1
#endif // __AVX__
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