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+// Copyright (C) 2008 Davis E. King (davis@dlib.net)
+// License: Boost Software License See LICENSE.txt for the full license.
+#ifndef DLIB_MATRIx_ASSIGn_
+#define DLIB_MATRIx_ASSIGn_
+
+#include "matrix.h"
+#include "matrix_utilities.h"
+#include "matrix_subexp.h"
+#include "../enable_if.h"
+#include "matrix_assign_fwd.h"
+#include "matrix_default_mul.h"
+#include "matrix_conj_trans.h"
+#include "matrix_mat.h"
+
+namespace dlib
+{
+ /*
+ This file contains some templates that are used inside the matrix_blas_bindings.h
+ file to bind various matrix expressions to optimized code for carrying them out.
+ */
+
+// ----------------------------------------------------------------------------------------
+// ----------------------------------------------------------------------------------------
+// ----------------------------------------------------------------------------------------
+
+ namespace blas_bindings
+ {
+
+ // ------------------------------------------------------------------------------------
+
+ template <typename T>
+ void zero_matrix (
+ T& m
+ )
+ {
+ for (long r = 0; r < m.nr(); ++r)
+ {
+ for (long c = 0; c < m.nc(); ++c)
+ {
+ m(r,c) = 0;
+ }
+ }
+ }
+
+ // ------------------------------------------------------------------------------------
+
+ // This template struct is used to tell us if a matrix expression contains a matrix multiply.
+ template <typename T>
+ struct has_matrix_multiply
+ {
+ const static bool value = false;
+ };
+
+ template <typename T, typename U>
+ struct has_matrix_multiply<matrix_multiply_exp<T,U> >
+ { const static bool value = true; };
+
+ template <typename T, typename U>
+ struct has_matrix_multiply<matrix_add_exp<T,U> >
+ { const static bool value = has_matrix_multiply<T>::value || has_matrix_multiply<U>::value; };
+
+ template <typename T, typename U>
+ struct has_matrix_multiply<matrix_subtract_exp<T,U> >
+ { const static bool value = has_matrix_multiply<T>::value || has_matrix_multiply<U>::value; };
+
+ template <typename T, bool Tb>
+ struct has_matrix_multiply<matrix_mul_scal_exp<T,Tb> >
+ { const static bool value = true; };
+
+ template <typename T>
+ struct has_matrix_multiply<matrix_div_scal_exp<T> >
+ { const static bool value = has_matrix_multiply<T>::value; };
+
+ template <typename T>
+ struct has_matrix_multiply<matrix_op<T> >
+ { const static bool value = has_matrix_multiply<T>::value; };
+
+ template <typename T>
+ struct has_matrix_multiply<op_trans<T> >
+ { const static bool value = has_matrix_multiply<T>::value; };
+
+ template <typename T>
+ struct has_matrix_multiply<op_conj_trans<T> >
+ { const static bool value = has_matrix_multiply<T>::value; };
+
+ template <typename T>
+ struct has_matrix_multiply<op_conj<T> >
+ { const static bool value = has_matrix_multiply<T>::value; };
+
+ // ------------------------------------------------------------------------------------
+ // ------------------------------------------------------------------------------------
+ // ------------------------------------------------------------------------------------
+
+ const int unknown_matrix = 0;
+ const int general_matrix = 1;
+ const int row_matrix = 2;
+ const int column_matrix = 3;
+
+ // ------------------------------------------------------------------------------------
+
+ template <typename T>
+ struct matrix_type_id
+ {
+ const static int value = unknown_matrix;
+ };
+
+ template <typename T, long NR, long NC, typename MM, typename L>
+ struct matrix_type_id<matrix<T,NR,NC,MM,L> >
+ {
+ const static int value = general_matrix;
+ };
+
+ template <typename T, long NR, typename MM, typename L>
+ struct matrix_type_id<matrix<T,NR,1,MM,L> >
+ {
+ const static int value = column_matrix;
+ };
+
+ template <typename T, typename MM, typename L>
+ struct matrix_type_id<matrix<T,1,1,MM,L> >
+ {
+ const static int value = column_matrix;
+ };
+
+ template <typename T, long NC, typename MM, typename L>
+ struct matrix_type_id<matrix<T,1,NC,MM,L> >
+ {
+ const static int value = row_matrix;
+ };
+
+ // ------------------------------------------------------------------------------------
+
+ template <typename T, long NR, long NC, typename MM, typename L>
+ struct matrix_type_id<matrix_op<op_colm<matrix<T,NR,NC,MM,L> > > >
+ {
+ const static int value = column_matrix;
+ };
+
+ template <typename T, long NR, long NC, typename MM, typename L>
+ struct matrix_type_id<matrix_op<op_rowm<matrix<T,NR,NC,MM,L> > > >
+ {
+ const static int value = row_matrix;
+ };
+
+ template <typename T, long NR, long NC, typename MM, typename L>
+ struct matrix_type_id<matrix_op<op_colm2<matrix<T,NR,NC,MM,L> > > >
+ {
+ const static int value = column_matrix;
+ };
+
+ template <typename T, long NR, long NC, typename MM, typename L>
+ struct matrix_type_id<matrix_op<op_rowm2<matrix<T,NR,NC,MM,L> > > >
+ {
+ const static int value = row_matrix;
+ };
+
+ template <typename T, long NR, long NC, typename MM, typename L>
+ struct matrix_type_id<matrix_op<op_subm<matrix<T,NR,NC,MM,L> > > >
+ {
+ const static int value = general_matrix;
+ };
+
+ template < typename T, typename MM >
+ struct matrix_type_id<matrix_op<op_array2d_to_mat<array2d<T,MM> > > >
+ { const static int value = general_matrix; };
+
+ template < typename T, typename MM >
+ struct matrix_type_id<matrix_op<op_array_to_mat<array<T,MM> > > >
+ { const static int value = column_matrix; };
+
+ template < typename value_type, typename alloc >
+ struct matrix_type_id<matrix_op<op_std_vect_to_mat<std::vector<value_type,alloc> > > >
+ { const static int value = column_matrix; };
+
+ template < typename value_type, typename alloc >
+ struct matrix_type_id<matrix_op<op_std_vect_to_mat<std_vector_c<value_type,alloc> > > >
+ { const static int value = column_matrix; };
+
+ template < typename T >
+ struct matrix_type_id<matrix_op<op_pointer_to_col_vect<T> > >
+ { const static int value = column_matrix; };
+ template < typename T >
+ struct matrix_type_id<matrix_op<op_pointer_to_mat<T> > >
+ { const static int value = general_matrix; };
+
+ // ------------------------------------------------------------------------------------
+
+ template <typename T, typename U>
+ struct same_matrix
+ {
+ const static int T_id = matrix_type_id<T>::value;
+ const static int U_id = matrix_type_id<U>::value;
+ // The check for unknown_matrix is here so that we can be sure that matrix types
+ // other than the ones specifically enumerated above never get pushed into
+ // any of the BLAS bindings. So saying they are never the same as anything
+ // else prevents them from matching any of the BLAS bindings.
+ const static bool value = (T_id == U_id) && (T_id != unknown_matrix);
+ };
+
+ // ------------------------------------------------------------------------------------
+ // ------------------------------------------------------------------------------------
+ // ------------------------------------------------------------------------------------
+
+ // This template struct is used to tell us if two matrix expressions both contain the same
+ // sequence of operators, expressions. It also only has a value of true if the T expression
+ // contains only matrices with the given layout.
+ template <typename T, typename U, typename layout>
+ struct same_exp
+ {
+ const static bool value = (is_same_type<typename T::exp_type, typename U::exp_type>::value ||
+ same_matrix<typename T::exp_type, typename U::exp_type>::value) &&
+ is_same_type<typename T::layout_type,layout>::value;
+
+ };
+
+ // Used only below. They help strip off the const and & qualifiers that can show up
+ // in the LHS_ref_type and RHS_ref_type typedefs.
+ template <typename T> struct noref{ typedef T type;};
+ template <typename T> struct noref<T&>{ typedef T type;};
+ template <typename T> struct noref<const T&>{ typedef T type;};
+ template <typename T> struct noref<const T>{ typedef T type;};
+
+ template <typename Tlhs, typename Ulhs, typename Trhs, typename Urhs, typename layout>
+ struct same_exp<matrix_multiply_exp<Tlhs,Trhs>, matrix_multiply_exp<Ulhs,Urhs>,layout >
+ {
+ // The reason this case is more complex than the others is because the matrix_multiply_exp
+ // will use a temporary matrix instead of Tlhs or Trhs in the event that one of these
+ // types corresponds to an expensive expression. So we have to use the type that really
+ // gets used. The following typedefs are here to pick out that true type.
+ typedef typename matrix_multiply_exp<Tlhs,Trhs>::LHS_ref_type T_LHS_ref_type;
+ typedef typename matrix_multiply_exp<Tlhs,Trhs>::RHS_ref_type T_RHS_ref_type;
+ typedef typename noref<T_LHS_ref_type>::type T_lhs_type;
+ typedef typename noref<T_RHS_ref_type>::type T_rhs_type;
+
+ typedef typename matrix_multiply_exp<Ulhs,Urhs>::LHS_ref_type U_LHS_ref_type;
+ typedef typename matrix_multiply_exp<Ulhs,Urhs>::RHS_ref_type U_RHS_ref_type;
+ typedef typename noref<U_LHS_ref_type>::type U_lhs_type;
+ typedef typename noref<U_RHS_ref_type>::type U_rhs_type;
+
+ const static bool value = same_exp<T_lhs_type,U_lhs_type,layout>::value &&
+ same_exp<T_rhs_type,U_rhs_type,layout>::value;
+ };
+
+ template <typename Tlhs, typename Ulhs, typename Trhs, typename Urhs, typename layout>
+ struct same_exp<matrix_add_exp<Tlhs,Trhs>, matrix_add_exp<Ulhs,Urhs>, layout >
+ { const static bool value = same_exp<Tlhs,Ulhs,layout>::value && same_exp<Trhs,Urhs,layout>::value; };
+
+ template <typename Tlhs, typename Ulhs, typename Trhs, typename Urhs, typename layout>
+ struct same_exp<matrix_subtract_exp<Tlhs,Trhs>, matrix_subtract_exp<Ulhs,Urhs>, layout >
+ { const static bool value = same_exp<Tlhs,Ulhs,layout>::value && same_exp<Trhs,Urhs,layout>::value; };
+
+ template <typename T, typename U, bool Tb, bool Ub, typename layout>
+ struct same_exp<matrix_mul_scal_exp<T,Tb>, matrix_mul_scal_exp<U,Ub>, layout >
+ { const static bool value = same_exp<T,U,layout>::value; };
+
+ template <typename T, typename U, typename layout>
+ struct same_exp<matrix_div_scal_exp<T>, matrix_div_scal_exp<U>, layout >
+ { const static bool value = same_exp<T,U,layout>::value; };
+
+ template <typename T, typename U, typename layout>
+ struct same_exp<matrix_op<op_trans<T> >, matrix_op<op_trans<U> >, layout >
+ { const static bool value = same_exp<T,U,layout>::value; };
+
+ template <typename T, typename U, typename layout>
+ struct same_exp<matrix_op<op_conj<T> >, matrix_op<op_conj<U> >, layout >
+ { const static bool value = same_exp<T,U,layout>::value; };
+
+ template <typename T, typename U, typename layout>
+ struct same_exp<matrix_op<op_conj_trans<T> >, matrix_op<op_conj_trans<U> >, layout >
+ { const static bool value = same_exp<T,U,layout>::value; };
+
+ // ------------------------------------------------------------------------------------
+
+ struct yes_type
+ {
+ char ch;
+ };
+ struct no_type
+ {
+ yes_type a, b;
+ };
+
+ // This is a helper that is used below to apply the same_exp template to matrix expressions.
+ template <typename T, typename layout, typename U>
+ typename enable_if<same_exp<T,U,layout>,yes_type>::type test(U);
+ template <typename T, typename layout, typename U>
+ typename disable_if<same_exp<T,U,layout>,no_type>::type test(U);
+
+ // ------------------------------------------------------------------------------------
+
+ template <
+ typename dest_exp,
+ typename src_exp,
+ typename enabled = void
+ >
+ struct matrix_assign_blas_helper
+ {
+ // We are in the default version of the blas helper so this
+ // means there wasn't any more specific overload. So just
+ // let the default matrix assignment happen.
+ template <typename EXP>
+ static void assign (
+ dest_exp& dest,
+ const EXP& src,
+ typename src_exp::type alpha,
+ bool add_to,
+ bool transpose
+ )
+ {
+ if (transpose == false)
+ matrix_assign_default(dest,src,alpha,add_to);
+ else
+ matrix_assign_default(dest,trans(src),alpha,add_to);
+ }
+
+ // If we know this is a matrix multiply then apply the
+ // default dlib matrix multiply to speed things up a bit more
+ // than the above default function would.
+ template <typename EXP1, typename EXP2>
+ static void assign (
+ dest_exp& dest,
+ const matrix_multiply_exp<EXP1,EXP2>& src,
+ typename src_exp::type alpha,
+ bool add_to,
+ bool transpose
+ )
+ {
+ // At some point I need to improve the default (i.e. non BLAS) matrix
+ // multiplication algorithm...
+
+ if (alpha == static_cast<typename src_exp::type>(1))
+ {
+ if (add_to == false)
+ {
+ zero_matrix(dest);
+ }
+
+ if (transpose == false)
+ default_matrix_multiply(dest, src.lhs, src.rhs);
+ else
+ default_matrix_multiply(dest, trans(src.rhs), trans(src.lhs));
+ }
+ else
+ {
+ if (add_to)
+ {
+ typename dest_exp::matrix_type temp(dest.nr(),dest.nc());
+ zero_matrix(temp);
+
+ if (transpose == false)
+ default_matrix_multiply(temp, src.lhs, src.rhs);
+ else
+ default_matrix_multiply(temp, trans(src.rhs), trans(src.lhs));
+
+ matrix_assign_default(dest,temp, alpha,true);
+ }
+ else
+ {
+ zero_matrix(dest);
+
+ if (transpose == false)
+ default_matrix_multiply(dest, src.lhs, src.rhs);
+ else
+ default_matrix_multiply(dest, trans(src.rhs), trans(src.lhs));
+
+ matrix_assign_default(dest,dest, alpha, false);
+ }
+ }
+ }
+ };
+
+ // This is a macro to help us add overloads for the matrix_assign_blas_helper template.
+ // Using this macro it is easy to add overloads for arbitrary matrix expressions.
+#define DLIB_ADD_BLAS_BINDING(src_expression) \
+ template <typename T, typename L> struct BOOST_JOIN(blas,__LINE__) \
+ { const static bool value = sizeof(yes_type) == sizeof(test<T,L>(src_expression)); }; \
+ \
+ template < typename dest_exp, typename src_exp > \
+ struct matrix_assign_blas_helper<dest_exp, src_exp, \
+ typename enable_if<BOOST_JOIN(blas,__LINE__)<src_exp,typename dest_exp::layout_type> >::type > { \
+ static void assign ( \
+ dest_exp& dest, \
+ const src_exp& src, \
+ typename src_exp::type alpha, \
+ bool add_to, \
+ bool DLIB_NO_WARN_UNUSED transpose \
+ ) { \
+ DLIB_NO_WARN_UNUSED typedef typename dest_exp::type T;
+
+#define DLIB_END_BLAS_BINDING }};
+
+ // ------------------------------------------------------------------------------------
+ // ------------------------------------------------------------------------------------
+ // ------------------------------------------------------------------------------------
+
+ // ------------------- Forward Declarations -------------------
+
+ template <
+ typename dest_exp,
+ typename src_exp
+ >
+ void matrix_assign_blas_proxy (
+ dest_exp& dest,
+ const src_exp& src,
+ typename src_exp::type alpha,
+ bool add_to,
+ bool transpose
+ );
+ /*!
+ requires
+ - src.aliases(dest) == false
+ - dest.nr() == src.nr()
+ - dest.nc() == src.nc()
+ !*/
+
+ template <
+ typename dest_exp,
+ typename src_exp, typename src_exp2
+ >
+ void matrix_assign_blas_proxy (
+ dest_exp& dest,
+ const matrix_add_exp<src_exp, src_exp2>& src,
+ typename src_exp::type alpha,
+ bool add_to,
+ bool transpose
+ );
+ /*!
+ requires
+ - src.aliases(dest) == false
+ - dest.nr() == src.nr()
+ - dest.nc() == src.nc()
+ !*/
+
+ template <
+ typename dest_exp,
+ typename src_exp, bool Sb
+ >
+ void matrix_assign_blas_proxy (
+ dest_exp& dest,
+ const matrix_mul_scal_exp<src_exp,Sb>& src,
+ typename src_exp::type alpha,
+ bool add_to,
+ bool transpose
+ );
+ /*!
+ requires
+ - src.aliases(dest) == false
+ - dest.nr() == src.nr()
+ - dest.nc() == src.nc()
+ !*/
+
+ template <
+ typename dest_exp,
+ typename src_exp
+ >
+ void matrix_assign_blas_proxy (
+ dest_exp& dest,
+ const matrix_op<op_trans<src_exp> >& src,
+ typename src_exp::type alpha,
+ bool add_to,
+ bool transpose
+ );
+ /*!
+ requires
+ - src.aliases(dest) == false
+ - dest.nr() == src.nr()
+ - dest.nc() == src.nc()
+ !*/
+
+ template <
+ typename dest_exp,
+ typename src_exp, typename src_exp2
+ >
+ void matrix_assign_blas_proxy (
+ dest_exp& dest,
+ const matrix_subtract_exp<src_exp, src_exp2>& src,
+ typename src_exp::type alpha,
+ bool add_to,
+ bool transpose
+ );
+ /*!
+ requires
+ - src.aliases(dest) == false
+ - dest.nr() == src.nr()
+ - dest.nc() == src.nc()
+ !*/
+
+ // ------------------------------------------------------------------------------------
+
+ template <
+ typename T, long NR, long NC, typename MM, typename L,
+ typename src_exp
+ >
+ void matrix_assign_blas (
+ matrix<T,NR,NC,MM,L>& dest,
+ const src_exp& src
+ );
+
+ template <
+ typename T, long NR, long NC, typename MM, typename L,
+ typename src_exp
+ >
+ void matrix_assign_blas (
+ matrix<T,NR,NC,MM,L>& dest,
+ const matrix_add_exp<matrix<T,NR,NC,MM,L> ,src_exp>& src
+ );
+ /*!
+ This function catches the expressions of the form:
+ M = M + exp;
+ and converts them into the appropriate matrix_assign_blas() call.
+ This is an important case to catch because it is the expression used
+ to represent the += matrix operator.
+ !*/
+
+ template <
+ typename T, long NR, long NC, typename MM, typename L,
+ typename src_exp
+ >
+ void matrix_assign_blas (
+ matrix<T,NR,NC,MM,L>& dest,
+ const matrix_add_exp<src_exp, matrix<T,NR,NC,MM,L> >& src
+ );
+ /*!
+ This function catches the expressions of the form:
+ M = exp + M;
+ and converts them into the appropriate matrix_assign_blas() call.
+ This is an important case to catch because it is the expression used
+ to represent the += matrix operator.
+ !*/
+
+ template <
+ typename T, long NR, long NC, typename MM, typename L,
+ typename src_exp
+ >
+ void matrix_assign_blas (
+ matrix<T,NR,NC,MM,L>& dest,
+ const matrix_subtract_exp<matrix<T,NR,NC,MM,L> ,src_exp>& src
+ );
+ /*!
+ This function catches the expressions of the form:
+ M = M - exp;
+ and converts them into the appropriate matrix_assign_blas() call.
+ This is an important case to catch because it is the expression used
+ to represent the -= matrix operator.
+ !*/
+
+
+ // End of forward declarations for overloaded matrix_assign_blas functions
+
+ // ------------------------------------------------------------------------------------
+ // ------------------------------------------------------------------------------------
+ // ------------------------------------------------------------------------------------
+
+ template <
+ typename dest_exp,
+ typename src_exp
+ >
+ void matrix_assign_blas_proxy (
+ dest_exp& dest,
+ const src_exp& src,
+ typename src_exp::type alpha,
+ bool add_to,
+ bool transpose
+ )
+ {
+ matrix_assign_blas_helper<dest_exp,src_exp>::assign(dest,src,alpha,add_to, transpose);
+ }
+
+ // ------------------------------------------------------------------------------------
+
+ template <
+ typename dest_exp,
+ typename src_exp, typename src_exp2
+ >
+ void matrix_assign_blas_proxy (
+ dest_exp& dest,
+ const matrix_add_exp<src_exp, src_exp2>& src,
+ typename src_exp::type alpha,
+ bool add_to,
+ bool transpose
+ )
+ {
+ if (has_matrix_multiply<src_exp>::value || has_matrix_multiply<src_exp2>::value)
+ {
+ matrix_assign_blas_proxy(dest, src.lhs, alpha, add_to, transpose);
+ matrix_assign_blas_proxy(dest, src.rhs, alpha, true, transpose);
+ }
+ else
+ {
+ if (transpose == false)
+ matrix_assign_default(dest, src, alpha, add_to);
+ else
+ matrix_assign_default(dest, trans(src), alpha, add_to);
+ }
+ }
+
+ // ------------------------------------------------------------------------------------
+
+ template <
+ typename dest_exp,
+ typename src_exp, bool Sb
+ >
+ void matrix_assign_blas_proxy (
+ dest_exp& dest,
+ const matrix_mul_scal_exp<src_exp,Sb>& src,
+ typename src_exp::type alpha,
+ bool add_to,
+ bool transpose
+ )
+ {
+ matrix_assign_blas_proxy(dest, src.m, alpha*src.s, add_to, transpose);
+ }
+
+ // ------------------------------------------------------------------------------------
+
+ template <
+ typename dest_exp,
+ typename src_exp
+ >
+ void matrix_assign_blas_proxy (
+ dest_exp& dest,
+ const matrix_op<op_trans<src_exp> >& src,
+ typename src_exp::type alpha,
+ bool add_to,
+ bool transpose
+ )
+ {
+ matrix_assign_blas_proxy(dest, src.op.m, alpha, add_to, !transpose);
+ }
+
+ // ------------------------------------------------------------------------------------
+
+ template <
+ typename dest_exp,
+ typename src_exp, typename src_exp2
+ >
+ void matrix_assign_blas_proxy (
+ dest_exp& dest,
+ const matrix_subtract_exp<src_exp, src_exp2>& src,
+ typename src_exp::type alpha,
+ bool add_to,
+ bool transpose
+ )
+ {
+
+ if (has_matrix_multiply<src_exp>::value || has_matrix_multiply<src_exp2>::value)
+ {
+ matrix_assign_blas_proxy(dest, src.lhs, alpha, add_to, transpose);
+ matrix_assign_blas_proxy(dest, src.rhs, -alpha, true, transpose);
+ }
+ else
+ {
+ if (transpose == false)
+ matrix_assign_default(dest, src, alpha, add_to);
+ else
+ matrix_assign_default(dest, trans(src), alpha, add_to);
+ }
+ }
+
+ // ------------------------------------------------------------------------------------
+ // ------------------------------------------------------------------------------------
+
+ // Once we get into this function it means that we are dealing with a matrix of float,
+ // double, complex<float>, or complex<double> and the src_exp contains at least one
+ // matrix multiply.
+
+ template <
+ typename T, long NR, long NC, typename MM, typename L,
+ long NR2, long NC2, bool Sb
+ >
+ void matrix_assign_blas (
+ matrix<T,NR,NC,MM,L>& dest,
+ const matrix_mul_scal_exp<matrix<T,NR2,NC2,MM,L>,Sb>& src
+ )
+ {
+ // It's ok that we don't check for aliasing in this case because there isn't
+ // any complex unrolling of successive + or - operators in this expression.
+ matrix_assign_blas_proxy(dest,src.m,src.s,false, false);
+ }
+
+ // ------------------------------------------------------------------------------------
+
+ template <
+ typename T, long NR, long NC, typename MM, typename L,
+ typename src_exp
+ >
+ void matrix_assign_blas (
+ matrix<T,NR,NC,MM,L>& dest,
+ const src_exp& src
+ )
+ {
+ if (src.aliases(dest))
+ {
+ matrix<T,NR,NC,MM,L> temp(dest.nr(),dest.nc());
+ matrix_assign_blas_proxy(temp,src,1,false, false);
+ temp.swap(dest);
+ }
+ else
+ {
+ matrix_assign_blas_proxy(dest,src,1,false, false);
+ }
+ }
+
+ // ------------------------------------------------------------------------------------
+
+ template <
+ typename T, long NR, long NC, typename MM, typename L,
+ typename src_exp
+ >
+ void matrix_assign_blas (
+ assignable_sub_matrix<T,NR,NC,MM,L>& dest,
+ const src_exp& src
+ )
+ {
+ if (src.aliases(dest.m))
+ {
+ matrix<T,NR,NC,MM,L> temp(dest.nr(),dest.nc());
+ matrix_assign_blas_proxy(temp,src,1,false, false);
+ matrix_assign_default(dest,temp);
+ }
+ else
+ {
+ matrix_assign_blas_proxy(dest,src,1,false, false);
+ }
+ }
+
+ // ------------------------------------------------------------------------------------
+
+ template <
+ typename T,
+ typename src_exp
+ >
+ void matrix_assign_blas (
+ assignable_ptr_matrix<T>& dest,
+ const src_exp& src
+ )
+ {
+ if (src.aliases(mat(dest.ptr,dest.height,dest.width)))
+ {
+ matrix<T> temp(dest.nr(),dest.nc());
+ matrix_assign_blas_proxy(temp,src,1,false, false);
+ matrix_assign_default(dest,temp);
+ }
+ else
+ {
+ matrix_assign_blas_proxy(dest,src,1,false, false);
+ }
+ }
+
+ // ------------------------------------------------------------------------------------
+
+ template <
+ typename T, long NR, long NC, typename MM, typename L,
+ typename src_exp
+ >
+ void matrix_assign_blas (
+ assignable_row_matrix<T,NR,NC,MM,L>& dest,
+ const src_exp& src
+ )
+ {
+ if (src.aliases(dest.m))
+ {
+ matrix<T,NR,NC,MM,L> temp(dest.nr(),dest.nc());
+ matrix_assign_blas_proxy(temp,src,1,false, false);
+ matrix_assign_default(dest,temp);
+ }
+ else
+ {
+ matrix_assign_blas_proxy(dest,src,1,false, false);
+ }
+ }
+
+ // ------------------------------------------------------------------------------------
+
+ template <
+ typename T, long NR, long NC, typename MM, typename L,
+ typename src_exp
+ >
+ void matrix_assign_blas (
+ assignable_col_matrix<T,NR,NC,MM,L>& dest,
+ const src_exp& src
+ )
+ {
+ if (src.aliases(dest.m))
+ {
+ matrix<T,NR,NC,MM,L> temp(dest.nr(),dest.nc());
+ matrix_assign_blas_proxy(temp,src,1,false, false);
+ matrix_assign_default(dest,temp);
+ }
+ else
+ {
+ matrix_assign_blas_proxy(dest,src,1,false, false);
+ }
+ }
+
+ // ------------------------------------------------------------------------------------
+
+ template <
+ typename T, long NR, long NC, typename MM, typename L,
+ typename src_exp
+ >
+ void matrix_assign_blas (
+ matrix<T,NR,NC,MM,L>& dest,
+ const matrix_add_exp<matrix<T,NR,NC,MM,L> ,src_exp>& src
+ )
+ {
+ if (src.rhs.aliases(dest) == false)
+ {
+ if (&src.lhs != &dest)
+ {
+ dest = src.lhs;
+ }
+
+ matrix_assign_blas_proxy(dest, src.rhs, 1, true, false);
+ }
+ else
+ {
+ matrix<T,NR,NC,MM,L> temp(src.lhs);
+ matrix_assign_blas_proxy(temp, src.rhs, 1, true, false);
+ temp.swap(dest);
+ }
+ }
+
+ // ------------------------------------------------------------------------------------
+
+ template <
+ typename T, long NR, long NC, typename MM, typename L,
+ typename src_exp
+ >
+ void matrix_assign_blas (
+ matrix<T,NR,NC,MM,L>& dest,
+ const matrix_add_exp<src_exp, matrix<T,NR,NC,MM,L> >& src
+ )
+ {
+ // Just switch around the left and right hand sides of the incoming
+ // add expression and pass it back into matrix_assign_blas() so that
+ // the above function will be called.
+ typedef matrix_add_exp<matrix<T,NR,NC,MM,L> ,src_exp> swapped_add_exp;
+ matrix_assign_blas(dest, swapped_add_exp(src.rhs, src.lhs));
+ }
+
+ // ------------------------------------------------------------------------------------
+
+ template <
+ typename T, long NR, long NC, typename MM, typename L,
+ typename src_exp
+ >
+ void matrix_assign_blas (
+ matrix<T,NR,NC,MM,L>& dest,
+ const matrix_subtract_exp<matrix<T,NR,NC,MM,L> ,src_exp>& src
+ )
+ {
+ if (src.rhs.aliases(dest) == false)
+ {
+ if (&src.lhs != &dest)
+ {
+ dest = src.lhs;
+ }
+
+ matrix_assign_blas_proxy(dest, src.rhs, -1, true, false);
+ }
+ else
+ {
+ matrix<T,NR,NC,MM,L> temp(src.lhs);
+ matrix_assign_blas_proxy(temp, src.rhs, -1, true, false);
+ temp.swap(dest);
+ }
+ }
+
+ // ------------------------------------------------------------------------------------
+ // ------------------------------------------------------------------------------------
+ // ------------------------------------------------------------------------------------
+
+ } // end of namespace blas_bindings
+
+ // ------------------------------------------------------------------------------------
+
+ template <
+ typename T, long NR, long NC, typename MM, typename L,
+ typename src_exp
+ >
+ inline typename enable_if_c<(is_same_type<T,float>::value ||
+ is_same_type<T,double>::value ||
+ is_same_type<T,std::complex<float> >::value ||
+ is_same_type<T,std::complex<double> >::value) &&
+ blas_bindings::has_matrix_multiply<src_exp>::value
+ >::type matrix_assign_big (
+ matrix<T,NR,NC,MM,L>& dest,
+ const src_exp& src
+ )
+ {
+ blas_bindings::matrix_assign_blas(dest,src);
+ }
+
+// ----------------------------------------------------------------------------------------
+
+ template <
+ typename T, long NR, long NC, typename MM, typename L,
+ typename src_exp
+ >
+ inline typename enable_if_c<(is_same_type<T,float>::value ||
+ is_same_type<T,double>::value ||
+ is_same_type<T,std::complex<float> >::value ||
+ is_same_type<T,std::complex<double> >::value) &&
+ blas_bindings::has_matrix_multiply<src_exp>::value
+ >::type matrix_assign_big (
+ assignable_sub_matrix<T,NR,NC,MM,L>& dest,
+ const src_exp& src
+ )
+ {
+ blas_bindings::matrix_assign_blas(dest,src);
+ }
+
+// ----------------------------------------------------------------------------------------
+
+ template <
+ typename T,
+ typename src_exp
+ >
+ inline typename enable_if_c<(is_same_type<T,float>::value ||
+ is_same_type<T,double>::value ||
+ is_same_type<T,std::complex<float> >::value ||
+ is_same_type<T,std::complex<double> >::value) &&
+ blas_bindings::has_matrix_multiply<src_exp>::value
+ >::type matrix_assign_big (
+ assignable_ptr_matrix<T>& dest,
+ const src_exp& src
+ )
+ {
+ blas_bindings::matrix_assign_blas(dest,src);
+ }
+
+// ----------------------------------------------------------------------------------------
+
+ template <
+ typename T, long NR, long NC, typename MM, typename L,
+ typename src_exp
+ >
+ inline typename enable_if_c<(is_same_type<T,float>::value ||
+ is_same_type<T,double>::value ||
+ is_same_type<T,std::complex<float> >::value ||
+ is_same_type<T,std::complex<double> >::value) &&
+ blas_bindings::has_matrix_multiply<src_exp>::value
+ >::type matrix_assign_big (
+ assignable_row_matrix<T,NR,NC,MM,L>& dest,
+ const src_exp& src
+ )
+ {
+ blas_bindings::matrix_assign_blas(dest,src);
+ }
+
+// ----------------------------------------------------------------------------------------
+
+ template <
+ typename T, long NR, long NC, typename MM, typename L,
+ typename src_exp
+ >
+ inline typename enable_if_c<(is_same_type<T,float>::value ||
+ is_same_type<T,double>::value ||
+ is_same_type<T,std::complex<float> >::value ||
+ is_same_type<T,std::complex<double> >::value) &&
+ blas_bindings::has_matrix_multiply<src_exp>::value
+ >::type matrix_assign_big (
+ assignable_col_matrix<T,NR,NC,MM,L>& dest,
+ const src_exp& src
+ )
+ {
+ blas_bindings::matrix_assign_blas(dest,src);
+ }
+
+// ----------------------------------------------------------------------------------------
+// ----------------------------------------------------------------------------------------
+// ----------------------------------------------------------------------------------------
+
+}
+
+#endif // DLIB_MATRIx_ASSIGn_
+
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