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#include "test.h"
#include <iostream>
#include "btas/tensor.h"
#include "btas/tensor_func.h"
#include "btas/generic/contract.h"
using std::cout;
using std::endl;
using namespace btas;
using DTensor = btas::Tensor<double>;
using DTensorView = btas::TensorViewOf<DTensor>;
static
std::ostream&
operator<<(std::ostream& s, const DTensor& X)
{
for(auto i : X.range()) s << i << " " << X(i) << "\n";
return s;
}
// Set the elements of a Tensor T such that
// T(i,j,k) = 1ijk
// assuming individual dimensions are all less than 10.
// (The 1 in front is just a placeholder.)
template<typename _Tens>
void static
fillEls(_Tens& T)
{
if(T.rank() == 0) return;
const auto base = pow(10.,T.rank());
const size_t max_ii = T.rank()-1;
for(auto I : T.range())
{
auto& val = T(I);
val = base;
for(size_t ii = 0; ii <= max_ii; ++ii)
{
val += I[ii]*pow(10.,max_ii-ii);
}
}
}
TEST_CASE("Tensor and TensorView Functions")
{
DTensor T2(3,2);
fillEls(T2);
DTensor T3(3,2,4);
fillEls(T3);
SECTION("Permute")
{
auto permutation = { 2, 1, 0 };
DTensor pT3 = permute(T3,permutation);
for(size_t i0 = 0; i0 < T3.extent(0); ++i0)
for(size_t i1 = 0; i1 < T3.extent(1); ++i1)
for(size_t i2 = 0; i2 < T3.extent(2); ++i2)
{
CHECK(pT3(i2,i1,i0) == T3(i0,i1,i2));
}
auto pvT3 = permute(T3,permutation);
for(size_t i0 = 0; i0 < T3.extent(0); ++i0)
for(size_t i1 = 0; i1 < T3.extent(1); ++i1)
for(size_t i2 = 0; i2 < T3.extent(2); ++i2)
{
CHECK(pvT3(i2,i1,i0) == T3(i0,i1,i2));
}
}
SECTION("Diag")
{
Range r({1,1,1},{3,3,4});
DTensor T1(r);
fillEls(T1);
DTensor Td=diag(T1);
for(size_t i0 = 0; i0 < T1.extent(0); ++i0)
CHECK(T1(i0+1,i0+1,i0+1) == Td(i0+1));
DTensor Tvd=diag(T1);
for(size_t i0 = 0; i0 < T1.extent(0); ++i0)
CHECK(T1(i0+1,i0+1,i0+1) == Tvd(i0+1));
RangeNd<blas::Layout::ColMajor> rc({1,1,1},{3,3,4});
DTensor Tc1(rc);
fillEls(Tc1);
DTensor Tcd=btas::diag(T1);
for(size_t i0 = 0; i0 < Tc1.extent(0); ++i0)
CHECK(Tc1(i0+1,i0+1,i0+1) == Tcd(i0+1));
auto Tcvd=btas::diag(T1);
for(size_t i0 = 0; i0 < Tc1.extent(0); ++i0)
CHECK(Tc1(i0+1,i0+1,i0+1) == Tcvd(i0+1));
}
SECTION("Group")
{
Range r({2,3,3});
DTensor T1(r);
fillEls(T1);
DTensor Tg=btas::group(T1,0,2);
CHECK(Tg.rank()== 2);
CHECK(Tg.size()== 18);
for(size_t i0 = 0; i0 < T1.extent(0); ++i0)
for(size_t i1 = 0; i1 < T1.extent(1); ++i1)
for(size_t i2 = 0; i2 < T1.extent(2); ++i2)
{
CHECK(T1(i0,i1,i2)== Tg(i0*T1.extent(1)+i1,i2));
}
auto Tvg=btas::group(T1,0,2);
CHECK(Tvg.rank()== 2);
CHECK(Tvg.size()== 18);
for(size_t i0 = 0; i0 < T1.extent(0); ++i0)
for(size_t i1 = 0; i1 < T1.extent(1); ++i1)
for(size_t i2 = 0; i2 < T1.extent(2); ++i2)
{
CHECK(T1(i0,i1,i2)== Tvg(i0*T1.extent(1)+i1,i2));
}
}
SECTION("Flatten")
{
Range r({2,3,3});
DTensor T1(r);
fillEls(T1);
DTensor Tg=btas::flatten(T1);
CHECK(Tg.rank()== 1);
CHECK(Tg.size()== 18);
for(size_t i0 = 0; i0 < T1.extent(0); ++i0)
for(size_t i1 = 0; i1 < T1.extent(1); ++i1)
for(size_t i2 = 0; i2 < T1.extent(2); ++i2)
{
CHECK(T1(i0,i1,i2)== Tg(i0*T1.extent(2)*T1.extent(1)+i1*T1.extent(2)+i2));
CHECK(T1(i0+T1.range().lobound()[0],i1+T1.range().lobound()[1],i2+T1.range().lobound()[2])== Tg(i0*T1.extent(2)*T1.extent(1)+i1*T1.extent(2)+i2));
}
auto Tvg=btas::flatten(T1);
CHECK(Tvg.rank()== 1);
CHECK(Tvg.size()== 18);
for(size_t i0 = 0; i0 < T1.extent(0); ++i0)
for(size_t i1 = 0; i1 < T1.extent(1); ++i1)
for(size_t i2 = 0; i2 < T1.extent(2); ++i2)
{
CHECK(T1(i0,i1,i2)== Tvg(i0*T1.extent(2)*T1.extent(1)+i1*T1.extent(2)+i2));
CHECK(T1(i0+T1.range().lobound()[0],i1+T1.range().lobound()[1],i2+T1.range().lobound()[2])== Tvg(i0*T1.extent(2)*T1.extent(1)+i1*T1.extent(2)+i2));
}
}
SECTION("Flatten Col Major")
{
RangeNd<blas::Layout::ColMajor> rc({1,1,1},{3,3,4});
DTensor T1(rc);
fillEls(T1);
DTensor Tg=btas::flatten(T1);
CHECK(Tg.rank()== 1);
CHECK(Tg.size()== 12);
for(size_t i0 = 0; i0 < T1.extent(0); ++i0)
for(size_t i1 = 0; i1 < T1.extent(1); ++i1)
for(size_t i2 = 0; i2 < T1.extent(2); ++i2)
//After Flatten, the 1st order range begin with 0.
CHECK(T1(i0+T1.range().lobound()[0],i1+T1.range().lobound()[1],i2+T1.range().lobound()[2])== Tg(i0*T1.extent(2)*T1.extent(1)+i1*T1.extent(2)+i2));
auto Tvg=btas::flatten(T1);
CHECK(Tvg.rank()== 1);
CHECK(Tvg.size()== 12);
for(size_t i0 = 0; i0 < T1.extent(0); ++i0)
for(size_t i1 = 0; i1 < T1.extent(1); ++i1)
for(size_t i2 = 0; i2 < T1.extent(2); ++i2)
//After Flatten, the 1st order range begin with 0.
CHECK(T1(i0+T1.range().lobound()[0],i1+T1.range().lobound()[1],i2+T1.range().lobound()[2])== Tvg(i0*T1.extent(2)*T1.extent(1)+i1*T1.extent(2)+i2));
}
SECTION("TieIndex")
{
DTensor T(3,4,4,4);
Range r({0,0,0,0},{3,4,4,4});
DTensor tT= btas::tieIndex(T,0,2);
CHECK(tT.rank()== 3);
CHECK(tT.size()== 48);
for(size_t i0 = 0; i0 < T.extent(0); ++i0)
for(size_t i1 = 0; i1 < T.extent(1); ++i1)
for(size_t i2 = 0; i2 < T.extent(3); ++i2)
CHECK(tT(i0,i1,i2) == T(i0,i1,i0,i2));
auto tTv= btas::tieIndex(T,0,2);
CHECK(tTv.rank()== 3);
CHECK(tTv.size()== 48);
for(size_t i0 = 0; i0 < T.extent(0); ++i0)
for(size_t i1 = 0; i1 < T.extent(1); ++i1)
for(size_t i2 = 0; i2 < T.extent(3); ++i2)
CHECK(tTv(i0,i1,i2) == T(i0,i1,i0,i2));
}
}
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