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hamming distance InnerProduct for booleans #4

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hamming distance InnerProduct for booleans #4

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20627c1
hamming distance InnerProduct for booleans
krunal1313 Aug 16, 2024
ce756b0
correct hamming distance
krunal1313 Aug 23, 2024
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25 changes: 21 additions & 4 deletions hnswlib/space_ip.h
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,19 @@ InnerProductDistance(const void *pVect1, const void *pVect2, const void *qty_ptr
return 1.0f - InnerProduct(pVect1, pVect2, qty_ptr);
}

static float
InnerProductDistance2(const void *pVect1, const void *pVect2, const void *qty_ptr) {
size_t qty = *((size_t *) qty_ptr);
float res = 0;
int a, b;
for (unsigned i = 0; i < qty; i++) {
a = ((int*)pVect1)[i];
b = ((int *) pVect2)[i];
res += a ^ b ;
}
return __builtin_popcount(res);
}

#if defined(USE_AVX)

// Favor using AVX if available.
Expand Down Expand Up @@ -320,7 +333,7 @@ class InnerProductSpace : public SpaceInterface<float> {
size_t dim_;

public:
InnerProductSpace(size_t dim) {
InnerProductSpace(size_t dim, bool is_boolean) {
fstdistfunc_ = InnerProductDistance;
#if defined(USE_AVX) || defined(USE_SSE) || defined(USE_AVX512)
#if defined(USE_AVX512)
Expand Down Expand Up @@ -353,9 +366,13 @@ class InnerProductSpace : public SpaceInterface<float> {
else if (dim > 4)
fstdistfunc_ = InnerProductDistanceSIMD4ExtResiduals;
#endif
dim_ = dim;
data_size_ = dim * sizeof(float);
}
if(is_boolean) {
fstdistfunc_ = InnerProductDistance2;
}

dim_ = dim;
data_size_ = dim * sizeof(float);
}

size_t get_data_size() {
return data_size_;
Expand Down