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diff --git a/bench/btl/libs/blitz/tiny_blitz_interface.hh b/bench/btl/libs/blitz/tiny_blitz_interface.hh
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+//=====================================================
+// File   :  tiny_blitz_interface.hh
+// Author :  L. Plagne <laurent.plagne@edf.fr)>
+// Copyright (C) EDF R&D,  lun sep 30 14:23:30 CEST 2002
+//=====================================================
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+//
+#ifndef TINY_BLITZ_INTERFACE_HH
+#define TINY_BLITZ_INTERFACE_HH
+
+#include "blitz/array.h"
+#include "blitz/tiny.h"
+#include "blitz/tinymat.h"
+#include "blitz/tinyvec.h"
+#include <blitz/tinyvec-et.h>
+
+#include <vector>
+
+BZ_USING_NAMESPACE(blitz)
+
+template<class real, int SIZE>
+class tiny_blitz_interface
+{
+
+public :
+
+  typedef real real_type ;
+
+  typedef std::vector<real>  stl_vector;
+  typedef std::vector<stl_vector > stl_matrix;
+
+  typedef TinyVector<real,SIZE> gene_vector;
+  typedef TinyMatrix<real,SIZE,SIZE> gene_matrix;
+
+  static inline std::string name() { return "tiny_blitz"; }
+
+  static void free_matrix(gene_matrix & A, int N){}
+
+  static void free_vector(gene_vector & B){}
+
+  static inline void matrix_from_stl(gene_matrix & A, stl_matrix & A_stl){
+    for (int j=0; j<A_stl.size() ; j++)
+      for (int i=0; i<A_stl[j].size() ; i++)
+        A(i,j)=A_stl[j][i];
+  }
+
+  static inline void vector_from_stl(gene_vector & B, stl_vector & B_stl){
+    for (int i=0; i<B_stl.size() ; i++)
+      B(i) = B_stl[i];
+  }
+
+  static inline void vector_to_stl(gene_vector & B, stl_vector & B_stl){
+    for (int i=0; i<B_stl.size() ; i++)
+      B_stl[i] = B(i);
+  }
+
+  static inline void matrix_to_stl(gene_matrix & A, stl_matrix & A_stl){
+    int N = A_stl.size();
+    for (int j=0;j<N;j++)
+    {
+      A_stl[j].resize(N);
+      for (int i=0;i<N;i++)
+        A_stl[j][i] = A(i,j);
+    }
+  }
+
+  static inline void copy_matrix(const gene_matrix & source, gene_matrix & cible, int N){
+    for (int j=0;j<N;j++)
+      for (int i=0;i<N;i++)
+        cible(i,j) = source(i,j);
+  }
+
+  static inline void copy_vector(const gene_vector & source, gene_vector & cible, int N){
+    for (int i=0;i<N;i++){
+      cible(i) = source(i);
+    }
+  }
+
+  static inline void matrix_matrix_product(const gene_matrix & A, const gene_matrix & B, gene_matrix & X, int N){
+    X = product(A,B);
+  }
+
+  static inline void matrix_vector_product(gene_matrix & A, gene_vector & B, gene_vector & X, int N){
+    X = product(A,B);
+  }
+
+  static inline void axpy(const real coef, const gene_vector & X, gene_vector & Y, int N){
+    Y += coef * X;
+  }
+
+};
+
+
+#endif