diff armadillo-2.4.4/include/armadillo_bits/op_dotext_meat.hpp @ 0:8b6102e2a9b0

Armadillo Library

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/armadillo-2.4.4/include/armadillo_bits/op_dotext_meat.hpp	Wed Apr 11 09:27:06 2012 +0100
@@ -0,0 +1,209 @@
+// Copyright (C) 2008-2010 NICTA (www.nicta.com.au)
+// Copyright (C) 2008-2010 Conrad Sanderson
+// 
+// This file is part of the Armadillo C++ library.
+// It is provided without any warranty of fitness
+// for any purpose. You can redistribute this file
+// and/or modify it under the terms of the GNU
+// Lesser General Public License (LGPL) as published
+// by the Free Software Foundation, either version 3
+// of the License or (at your option) any later version.
+// (see http://www.opensource.org/licenses for more info)
+
+
+//! \addtogroup op_dotext
+//! @{
+
+
+
+template<typename eT>
+inline
+eT
+op_dotext::direct_rowvec_mat_colvec
+  (
+  const eT*      A_mem,
+  const Mat<eT>& B,
+  const eT*      C_mem
+  )
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword cost_AB = B.n_cols;
+  const uword cost_BC = B.n_rows;
+  
+  if(cost_AB <= cost_BC)
+    {
+    podarray<eT> tmp(B.n_cols);
+    
+    for(uword col=0; col<B.n_cols; ++col)
+      {
+      const eT* B_coldata = B.colptr(col);
+      
+      eT val = eT(0);
+      for(uword i=0; i<B.n_rows; ++i)
+        {
+        val += A_mem[i] * B_coldata[i];
+        }
+        
+      tmp[col] = val;
+      }
+    
+    return op_dot::direct_dot(B.n_cols, tmp.mem, C_mem);
+    }
+  else
+    {
+    podarray<eT> tmp(B.n_rows);
+    
+    for(uword row=0; row<B.n_rows; ++row)
+      {
+      eT val = eT(0);
+      for(uword col=0; col<B.n_cols; ++col)
+        {
+        val += B.at(row,col) * C_mem[col];
+        }
+      
+      tmp[row] = val;
+      }
+    
+    return op_dot::direct_dot(B.n_rows, A_mem, tmp.mem);
+    }
+  
+  
+  }
+
+
+
+template<typename eT>
+inline
+eT
+op_dotext::direct_rowvec_transmat_colvec
+  (
+  const eT*      A_mem,
+  const Mat<eT>& B,
+  const eT*      C_mem
+  )
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword cost_AB = B.n_rows;
+  const uword cost_BC = B.n_cols;
+  
+  if(cost_AB <= cost_BC)
+    {
+    podarray<eT> tmp(B.n_rows);
+    
+    for(uword row=0; row<B.n_rows; ++row)
+      {
+      eT val = eT(0);
+      
+      for(uword i=0; i<B.n_cols; ++i)
+        {
+        val += A_mem[i] * B.at(row,i);
+        }
+        
+      tmp[row] = val;
+      }
+    
+    return op_dot::direct_dot(B.n_rows, tmp.mem, C_mem);
+    }
+  else
+    {
+    podarray<eT> tmp(B.n_cols);
+    
+    for(uword col=0; col<B.n_cols; ++col)
+      {
+      const eT* B_coldata = B.colptr(col);
+      
+      eT val = eT(0);
+      
+      for(uword i=0; i<B.n_rows; ++i)
+        {
+        val += B_coldata[i] * C_mem[i];
+        }
+      
+      tmp[col] = val;
+      }
+    
+    return op_dot::direct_dot(B.n_cols, A_mem, tmp.mem);
+    }
+  
+  
+  }
+
+
+
+template<typename eT>
+inline
+eT
+op_dotext::direct_rowvec_diagmat_colvec
+  (
+  const eT*      A_mem,
+  const Mat<eT>& B,
+  const eT*      C_mem
+  )
+  {
+  arma_extra_debug_sigprint();
+  
+  eT val = eT(0);
+
+  for(uword i=0; i<B.n_rows; ++i)
+    {
+    val += A_mem[i] * B.at(i,i) * C_mem[i];
+    }
+
+  return val;
+  }
+
+
+
+template<typename eT>
+inline
+eT
+op_dotext::direct_rowvec_invdiagmat_colvec
+  (
+  const eT*      A_mem,
+  const Mat<eT>& B,
+  const eT*      C_mem
+  )
+  {
+  arma_extra_debug_sigprint();
+  
+  eT val = eT(0);
+
+  for(uword i=0; i<B.n_rows; ++i)
+    {
+    val += (A_mem[i] * C_mem[i]) / B.at(i,i);
+    }
+
+  return val;
+  }
+
+
+
+template<typename eT>
+inline
+eT
+op_dotext::direct_rowvec_invdiagvec_colvec
+  (
+  const eT*      A_mem,
+  const Mat<eT>& B,
+  const eT*      C_mem
+  )
+  {
+  arma_extra_debug_sigprint();
+  
+  const eT* B_mem = B.mem;
+  
+  eT val = eT(0);
+
+  for(uword i=0; i<B.n_elem; ++i)
+    {
+    val += (A_mem[i] * C_mem[i]) / B_mem[i];
+    }
+
+  return val;
+  }
+
+
+
+//! @}