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Workaround for missing intrinsic on gcc < 9 #3481

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Workaround for missing intrinsic on gcc < 9 #3481

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5 changes: 5 additions & 0 deletions faiss/impl/code_distance/code_distance-avx2.h
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Expand Up @@ -16,6 +16,11 @@
#include <faiss/impl/ProductQuantizer.h>
#include <faiss/impl/code_distance/code_distance-generic.h>

// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78782
#if defined(__GNUC__) && __GNUC__ < 9
#define _mm_loadu_si64(x) (_mm_loadl_epi64((__m128i_u*)x))
#endif

namespace {

inline float horizontal_sum(const __m128 v) {
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