CPPScaLapack: dgematrix-dcovector.hpp Source File

00001 //=============================================================================
00002 /*! dgematrix*dcovector operator */
00003 inline _dcovector operator*(const dgematrix& mat, const dcovector& vec)
00004 {
00005 #ifdef  CPPSL_DEBUG
00006   if(mat.N!=vec.L){
00007     std::cerr << "[ERROR] operator*(const dgematrix&, const dcovector&)"
00008               << std::endl
00009               << "These matrix and vector can not make a product." << std::endl
00010               << "Your input was (" << mat.m << "x" << mat.n << ") * ("
00011               << vec.l << ")." << std::endl;
00012     exit(1);
00013   }
00014 #endif//CPPSL_DEBUG
00015   
00016   _dcovector newvec(mat.M);
00017   pdgemv_( 'N', mat.M, mat.N, 1.0, mat.Array, 1, 1, mat.Desc,
00018            vec.Array, 1, 1, vec.Desc, 1, 0.0,
00019            newvec.Array, 1, 1, newvec.Desc, 1 );
00020   
00021   return newvec;
00022 }