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space_ip.h
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space_ip.h
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#pragma once
#include "hnswlib.h"
namespace hnswlib {
static float
InnerProduct(const void *pVect1, const void *pVect2, const void *qty_ptr) {
size_t qty = *((size_t *) qty_ptr);
float res = 0;
for (unsigned i = 0; i < qty; i++) {
res += ((float *) pVect1)[i] * ((float *) pVect2)[i];
}
return res;
}
static float
InnerProductDistance(const void *pVect1, const void *pVect2, const void *qty_ptr) {
return 1.0f - InnerProduct(pVect1, pVect2, qty_ptr);
}
#if defined(USE_AVX)
// Favor using AVX if available.
static float
InnerProductSIMD4ExtAVX(const void *pVect1v, const void *pVect2v, const void *qty_ptr) {
float PORTABLE_ALIGN32 TmpRes[8];
float *pVect1 = (float *) pVect1v;
float *pVect2 = (float *) pVect2v;
size_t qty = *((size_t *) qty_ptr);
size_t qty16 = qty / 16;
size_t qty4 = qty / 4;
const float *pEnd1 = pVect1 + 16 * qty16;
const float *pEnd2 = pVect1 + 4 * qty4;
__m256 sum256 = _mm256_set1_ps(0);
while (pVect1 < pEnd1) {
//_mm_prefetch((char*)(pVect2 + 16), _MM_HINT_T0);
__m256 v1 = _mm256_loadu_ps(pVect1);
pVect1 += 8;
__m256 v2 = _mm256_loadu_ps(pVect2);
pVect2 += 8;
sum256 = _mm256_add_ps(sum256, _mm256_mul_ps(v1, v2));
v1 = _mm256_loadu_ps(pVect1);
pVect1 += 8;
v2 = _mm256_loadu_ps(pVect2);
pVect2 += 8;
sum256 = _mm256_add_ps(sum256, _mm256_mul_ps(v1, v2));
}
__m128 v1, v2;
__m128 sum_prod = _mm_add_ps(_mm256_extractf128_ps(sum256, 0), _mm256_extractf128_ps(sum256, 1));
while (pVect1 < pEnd2) {
v1 = _mm_loadu_ps(pVect1);
pVect1 += 4;
v2 = _mm_loadu_ps(pVect2);
pVect2 += 4;
sum_prod = _mm_add_ps(sum_prod, _mm_mul_ps(v1, v2));
}
_mm_store_ps(TmpRes, sum_prod);
float sum = TmpRes[0] + TmpRes[1] + TmpRes[2] + TmpRes[3];;
return sum;
}
static float
InnerProductDistanceSIMD4ExtAVX(const void *pVect1v, const void *pVect2v, const void *qty_ptr) {
return 1.0f - InnerProductSIMD4ExtAVX(pVect1v, pVect2v, qty_ptr);
}
#endif
#if defined(USE_SSE)
static float
InnerProductSIMD4ExtSSE(const void *pVect1v, const void *pVect2v, const void *qty_ptr) {
float PORTABLE_ALIGN32 TmpRes[8];
float *pVect1 = (float *) pVect1v;
float *pVect2 = (float *) pVect2v;
size_t qty = *((size_t *) qty_ptr);
size_t qty16 = qty / 16;
size_t qty4 = qty / 4;
const float *pEnd1 = pVect1 + 16 * qty16;
const float *pEnd2 = pVect1 + 4 * qty4;
__m128 v1, v2;
__m128 sum_prod = _mm_set1_ps(0);
while (pVect1 < pEnd1) {
v1 = _mm_loadu_ps(pVect1);
pVect1 += 4;
v2 = _mm_loadu_ps(pVect2);
pVect2 += 4;
sum_prod = _mm_add_ps(sum_prod, _mm_mul_ps(v1, v2));
v1 = _mm_loadu_ps(pVect1);
pVect1 += 4;
v2 = _mm_loadu_ps(pVect2);
pVect2 += 4;
sum_prod = _mm_add_ps(sum_prod, _mm_mul_ps(v1, v2));
v1 = _mm_loadu_ps(pVect1);
pVect1 += 4;
v2 = _mm_loadu_ps(pVect2);
pVect2 += 4;
sum_prod = _mm_add_ps(sum_prod, _mm_mul_ps(v1, v2));
v1 = _mm_loadu_ps(pVect1);
pVect1 += 4;
v2 = _mm_loadu_ps(pVect2);
pVect2 += 4;
sum_prod = _mm_add_ps(sum_prod, _mm_mul_ps(v1, v2));
}
while (pVect1 < pEnd2) {
v1 = _mm_loadu_ps(pVect1);
pVect1 += 4;
v2 = _mm_loadu_ps(pVect2);
pVect2 += 4;
sum_prod = _mm_add_ps(sum_prod, _mm_mul_ps(v1, v2));
}
_mm_store_ps(TmpRes, sum_prod);
float sum = TmpRes[0] + TmpRes[1] + TmpRes[2] + TmpRes[3];
return sum;
}
static float
InnerProductDistanceSIMD4ExtSSE(const void *pVect1v, const void *pVect2v, const void *qty_ptr) {
return 1.0f - InnerProductSIMD4ExtSSE(pVect1v, pVect2v, qty_ptr);
}
#endif
#if defined(USE_AVX512)
static float
InnerProductSIMD16ExtAVX512(const void *pVect1v, const void *pVect2v, const void *qty_ptr) {
float PORTABLE_ALIGN64 TmpRes[16];
float *pVect1 = (float *) pVect1v;
float *pVect2 = (float *) pVect2v;
size_t qty = *((size_t *) qty_ptr);
size_t qty16 = qty / 16;
const float *pEnd1 = pVect1 + 16 * qty16;
__m512 sum512 = _mm512_set1_ps(0);
while (pVect1 < pEnd1) {
//_mm_prefetch((char*)(pVect2 + 16), _MM_HINT_T0);
__m512 v1 = _mm512_loadu_ps(pVect1);
pVect1 += 16;
__m512 v2 = _mm512_loadu_ps(pVect2);
pVect2 += 16;
sum512 = _mm512_add_ps(sum512, _mm512_mul_ps(v1, v2));
}
_mm512_store_ps(TmpRes, sum512);
float sum = TmpRes[0] + TmpRes[1] + TmpRes[2] + TmpRes[3] + TmpRes[4] + TmpRes[5] + TmpRes[6] + TmpRes[7] + TmpRes[8] + TmpRes[9] + TmpRes[10] + TmpRes[11] + TmpRes[12] + TmpRes[13] + TmpRes[14] + TmpRes[15];
return sum;
}
static float
InnerProductDistanceSIMD16ExtAVX512(const void *pVect1v, const void *pVect2v, const void *qty_ptr) {
return 1.0f - InnerProductSIMD16ExtAVX512(pVect1v, pVect2v, qty_ptr);
}
#endif
#if defined(USE_AVX)
static float
InnerProductSIMD16ExtAVX(const void *pVect1v, const void *pVect2v, const void *qty_ptr) {
float PORTABLE_ALIGN32 TmpRes[8];
float *pVect1 = (float *) pVect1v;
float *pVect2 = (float *) pVect2v;
size_t qty = *((size_t *) qty_ptr);
size_t qty16 = qty / 16;
const float *pEnd1 = pVect1 + 16 * qty16;
__m256 sum256 = _mm256_set1_ps(0);
while (pVect1 < pEnd1) {
//_mm_prefetch((char*)(pVect2 + 16), _MM_HINT_T0);
__m256 v1 = _mm256_loadu_ps(pVect1);
pVect1 += 8;
__m256 v2 = _mm256_loadu_ps(pVect2);
pVect2 += 8;
sum256 = _mm256_add_ps(sum256, _mm256_mul_ps(v1, v2));
v1 = _mm256_loadu_ps(pVect1);
pVect1 += 8;
v2 = _mm256_loadu_ps(pVect2);
pVect2 += 8;
sum256 = _mm256_add_ps(sum256, _mm256_mul_ps(v1, v2));
}
_mm256_store_ps(TmpRes, sum256);
float sum = TmpRes[0] + TmpRes[1] + TmpRes[2] + TmpRes[3] + TmpRes[4] + TmpRes[5] + TmpRes[6] + TmpRes[7];
return sum;
}
static float
InnerProductDistanceSIMD16ExtAVX(const void *pVect1v, const void *pVect2v, const void *qty_ptr) {
return 1.0f - InnerProductSIMD16ExtAVX(pVect1v, pVect2v, qty_ptr);
}
#endif
#if defined(USE_SSE)
static float
InnerProductSIMD16ExtSSE(const void *pVect1v, const void *pVect2v, const void *qty_ptr) {
float PORTABLE_ALIGN32 TmpRes[8];
float *pVect1 = (float *) pVect1v;
float *pVect2 = (float *) pVect2v;
size_t qty = *((size_t *) qty_ptr);
size_t qty16 = qty / 16;
const float *pEnd1 = pVect1 + 16 * qty16;
__m128 v1, v2;
__m128 sum_prod = _mm_set1_ps(0);
while (pVect1 < pEnd1) {
v1 = _mm_loadu_ps(pVect1);
pVect1 += 4;
v2 = _mm_loadu_ps(pVect2);
pVect2 += 4;
sum_prod = _mm_add_ps(sum_prod, _mm_mul_ps(v1, v2));
v1 = _mm_loadu_ps(pVect1);
pVect1 += 4;
v2 = _mm_loadu_ps(pVect2);
pVect2 += 4;
sum_prod = _mm_add_ps(sum_prod, _mm_mul_ps(v1, v2));
v1 = _mm_loadu_ps(pVect1);
pVect1 += 4;
v2 = _mm_loadu_ps(pVect2);
pVect2 += 4;
sum_prod = _mm_add_ps(sum_prod, _mm_mul_ps(v1, v2));
v1 = _mm_loadu_ps(pVect1);
pVect1 += 4;
v2 = _mm_loadu_ps(pVect2);
pVect2 += 4;
sum_prod = _mm_add_ps(sum_prod, _mm_mul_ps(v1, v2));
}
_mm_store_ps(TmpRes, sum_prod);
float sum = TmpRes[0] + TmpRes[1] + TmpRes[2] + TmpRes[3];
return sum;
}
static float
InnerProductDistanceSIMD16ExtSSE(const void *pVect1v, const void *pVect2v, const void *qty_ptr) {
return 1.0f - InnerProductSIMD16ExtSSE(pVect1v, pVect2v, qty_ptr);
}
#endif
#if defined(USE_SSE) || defined(USE_AVX) || defined(USE_AVX512)
DISTFUNC<float> InnerProductSIMD16Ext = InnerProductSIMD16ExtSSE;
DISTFUNC<float> InnerProductSIMD4Ext = InnerProductSIMD4ExtSSE;
DISTFUNC<float> InnerProductDistanceSIMD16Ext = InnerProductDistanceSIMD16ExtSSE;
DISTFUNC<float> InnerProductDistanceSIMD4Ext = InnerProductDistanceSIMD4ExtSSE;
static float
InnerProductDistanceSIMD16ExtResiduals(const void *pVect1v, const void *pVect2v, const void *qty_ptr) {
size_t qty = *((size_t *) qty_ptr);
size_t qty16 = qty >> 4 << 4;
float res = InnerProductSIMD16Ext(pVect1v, pVect2v, &qty16);
float *pVect1 = (float *) pVect1v + qty16;
float *pVect2 = (float *) pVect2v + qty16;
size_t qty_left = qty - qty16;
float res_tail = InnerProduct(pVect1, pVect2, &qty_left);
return 1.0f - (res + res_tail);
}
static float
InnerProductDistanceSIMD4ExtResiduals(const void *pVect1v, const void *pVect2v, const void *qty_ptr) {
size_t qty = *((size_t *) qty_ptr);
size_t qty4 = qty >> 2 << 2;
float res = InnerProductSIMD4Ext(pVect1v, pVect2v, &qty4);
size_t qty_left = qty - qty4;
float *pVect1 = (float *) pVect1v + qty4;
float *pVect2 = (float *) pVect2v + qty4;
float res_tail = InnerProduct(pVect1, pVect2, &qty_left);
return 1.0f - (res + res_tail);
}
#endif
class InnerProductSpace : public SpaceInterface<float> {
DISTFUNC<float> fstdistfunc_;
size_t data_size_;
size_t dim_;
public:
InnerProductSpace(size_t dim) {
fstdistfunc_ = InnerProductDistance;
#if defined(USE_AVX) || defined(USE_SSE) || defined(USE_AVX512)
#if defined(USE_AVX512)
if (AVX512Capable()) {
InnerProductSIMD16Ext = InnerProductSIMD16ExtAVX512;
InnerProductDistanceSIMD16Ext = InnerProductDistanceSIMD16ExtAVX512;
} else if (AVXCapable()) {
InnerProductSIMD16Ext = InnerProductSIMD16ExtAVX;
InnerProductDistanceSIMD16Ext = InnerProductDistanceSIMD16ExtAVX;
}
#elif defined(USE_AVX)
if (AVXCapable()) {
InnerProductSIMD16Ext = InnerProductSIMD16ExtAVX;
InnerProductDistanceSIMD16Ext = InnerProductDistanceSIMD16ExtAVX;
}
#endif
#if defined(USE_AVX)
if (AVXCapable()) {
InnerProductSIMD4Ext = InnerProductSIMD4ExtAVX;
InnerProductDistanceSIMD4Ext = InnerProductDistanceSIMD4ExtAVX;
}
#endif
if (dim % 16 == 0)
fstdistfunc_ = InnerProductDistanceSIMD16Ext;
else if (dim % 4 == 0)
fstdistfunc_ = InnerProductDistanceSIMD4Ext;
else if (dim > 16)
fstdistfunc_ = InnerProductDistanceSIMD16ExtResiduals;
else if (dim > 4)
fstdistfunc_ = InnerProductDistanceSIMD4ExtResiduals;
#endif
dim_ = dim;
data_size_ = dim * sizeof(float);
}
size_t get_data_size() {
return data_size_;
}
DISTFUNC<float> get_dist_func() {
return fstdistfunc_;
}
void *get_dist_func_param() {
return &dim_;
}
~InnerProductSpace() {}
};
}