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#include "dot_product.h"
#include "dot_product_sse.h"
#include "dot_product_avx2.h"
#include "dot_product_simple.h"
#include <library/cpp/sse/sse.h>
#include <library/cpp/testing/common/env.h>
#include <util/system/compiler.h>
#include <util/generic/utility.h>
#include <util/system/cpu_id.h>
#include <util/system/env.h>
namespace NDotProductImpl {
i32 (*DotProductI8Impl)(const i8* lhs, const i8* rhs, size_t length) noexcept = &DotProductSimple;
ui32 (*DotProductUi8Impl)(const ui8* lhs, const ui8* rhs, size_t length) noexcept = &DotProductSimple;
i64 (*DotProductI32Impl)(const i32* lhs, const i32* rhs, size_t length) noexcept = &DotProductSimple;
float (*DotProductFloatImpl)(const float* lhs, const float* rhs, size_t length) noexcept = &DotProductSimple;
double (*DotProductDoubleImpl)(const double* lhs, const double* rhs, size_t length) noexcept = &DotProductSimple;
TTriWayDotProduct<float> (*TriWayDotProductImpl)
(const float* lhs, const float* rhs, size_t length, bool computeRR) noexcept = &TriWayDotProductSimple;
namespace {
[[maybe_unused]] const int _ = [] {
if (!FromYaTest() && GetEnv("Y_NO_AVX_IN_DOT_PRODUCT") == "" && NX86::HaveAVX2() && NX86::HaveFMA()) {
DotProductI8Impl = &DotProductAvx2;
DotProductUi8Impl = &DotProductAvx2;
DotProductI32Impl = &DotProductAvx2;
DotProductFloatImpl = &DotProductAvx2;
DotProductDoubleImpl = &DotProductAvx2;
TriWayDotProductImpl = &TriWayDotProductAvx2;
} else {
#ifdef ARCADIA_SSE
DotProductI8Impl = &DotProductSse;
DotProductUi8Impl = &DotProductSse;
DotProductI32Impl = &DotProductSse;
DotProductFloatImpl = &DotProductSse;
DotProductDoubleImpl = &DotProductSse;
TriWayDotProductImpl = &TriWayDotProductSse;
#endif
}
return 0;
}();
}
}
#ifdef ARCADIA_SSE
float L2NormSquared(const float* v, size_t length) noexcept {
__m128 sum1 = _mm_setzero_ps();
__m128 sum2 = _mm_setzero_ps();
__m128 a1, a2, m1, m2;
while (length >= 8) {
a1 = _mm_loadu_ps(v);
m1 = _mm_mul_ps(a1, a1);
a2 = _mm_loadu_ps(v + 4);
sum1 = _mm_add_ps(sum1, m1);
m2 = _mm_mul_ps(a2, a2);
sum2 = _mm_add_ps(sum2, m2);
length -= 8;
v += 8;
}
if (length >= 4) {
a1 = _mm_loadu_ps(v);
sum1 = _mm_add_ps(sum1, _mm_mul_ps(a1, a1));
length -= 4;
v += 4;
}
sum1 = _mm_add_ps(sum1, sum2);
if (length) {
switch (length) {
case 3:
a1 = _mm_set_ps(0.0f, v[2], v[1], v[0]);
break;
case 2:
a1 = _mm_set_ps(0.0f, 0.0f, v[1], v[0]);
break;
case 1:
a1 = _mm_set_ps(0.0f, 0.0f, 0.0f, v[0]);
break;
default:
Y_UNREACHABLE();
}
sum1 = _mm_add_ps(sum1, _mm_mul_ps(a1, a1));
}
alignas(16) float res[4];
_mm_store_ps(res, sum1);
return res[0] + res[1] + res[2] + res[3];
}
TTriWayDotProduct<float> TriWayDotProduct(const float* lhs, const float* rhs, size_t length, unsigned mask) noexcept {
mask &= 0b111;
if (Y_LIKELY(mask == 0b111)) { // compute dot-product and length² of two vectors
return NDotProductImpl::TriWayDotProductImpl(lhs, rhs, length, true);
} else if (Y_LIKELY(mask == 0b110 || mask == 0b011)) { // compute dot-product and length² of one vector
const bool computeLL = (mask == 0b110);
if (!computeLL) {
DoSwap(lhs, rhs);
}
auto result = NDotProductImpl::TriWayDotProductImpl(lhs, rhs, length, false);
if (!computeLL) {
DoSwap(result.LL, result.RR);
}
return result;
} else {
// dispatch unlikely & sparse cases
TTriWayDotProduct<float> result{};
switch(mask) {
case 0b000:
break;
case 0b100:
result.LL = L2NormSquared(lhs, length);
break;
case 0b010:
result.LR = DotProduct(lhs, rhs, length);
break;
case 0b001:
result.RR = L2NormSquared(rhs, length);
break;
case 0b101:
result.LL = L2NormSquared(lhs, length);
result.RR = L2NormSquared(rhs, length);
break;
default:
Y_UNREACHABLE();
}
return result;
}
}
#else
float L2NormSquared(const float* v, size_t length) noexcept {
return DotProduct(v, v, length);
}
TTriWayDotProduct<float> TriWayDotProduct(const float* lhs, const float* rhs, size_t length, unsigned mask) noexcept {
TTriWayDotProduct<float> result;
if (mask & static_cast<unsigned>(ETriWayDotProductComputeMask::LL)) {
result.LL = L2NormSquared(lhs, length);
}
if (mask & static_cast<unsigned>(ETriWayDotProductComputeMask::LR)) {
result.LR = DotProduct(lhs, rhs, length);
}
if (mask & static_cast<unsigned>(ETriWayDotProductComputeMask::RR)) {
result.RR = L2NormSquared(rhs, length);
}
return result;
}
#endif // ARCADIA_SSE
namespace NDotProduct {
void DisableAvx2() {
#ifdef ARCADIA_SSE
NDotProductImpl::DotProductI8Impl = &DotProductSse;
NDotProductImpl::DotProductUi8Impl = &DotProductSse;
NDotProductImpl::DotProductI32Impl = &DotProductSse;
NDotProductImpl::DotProductFloatImpl = &DotProductSse;
NDotProductImpl::DotProductDoubleImpl = &DotProductSse;
NDotProductImpl::TriWayDotProductImpl = &TriWayDotProductSse;
#else
NDotProductImpl::DotProductI8Impl = &DotProductSimple;
NDotProductImpl::DotProductUi8Impl = &DotProductSimple;
NDotProductImpl::DotProductI32Impl = &DotProductSimple;
NDotProductImpl::DotProductFloatImpl = &DotProductSimple;
NDotProductImpl::DotProductDoubleImpl = &DotProductSimple;
NDotProductImpl::TriWayDotProductImpl = &TriWayDotProductSimple;
#endif
}
}
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