Add a new overload of MatSparse<FPP, GPU2>::tocpu.

src/faust_linear_operator/GPU2/faust_MatSparse_gpu.h

@@ -74,6 +74,7 @@ namespace Faust
 
 				void tocpu(MatSparse<FPP,Cpu> &sp_mat) const;
 				void tocpu(int* row_ptr, int* col_ind, FPP* value_ptr, int* nrows=nullptr, int* ncols=nullptr, int* nnz=nullptr) const;
+				MatSparse<FPP,Cpu> tocpu() const;
 				Real<FPP> norm() const;
 				void transpose();
 				void adjoint();

src/faust_linear_operator/GPU2/faust_MatSparse_gpu.hpp

@@ -29,5 +29,14 @@ namespace Faust {
 		{
 			return MatDense<FPP, GPU2>(*this);
 		}
+
+
+	template<typename FPP>
+		MatSparse<FPP, Cpu> MatSparse<FPP,GPU2>::tocpu() const
+		{
+			MatSparse<FPP, Cpu> cpu_smat(this->getNbRow(), this->getNbCol());
+			tocpu(cpu_smat);
+			return cpu_smat;
+		}
 }