aboutsummaryrefslogtreecommitdiffhomepage
path: root/Eigen/src/Core
diff options
context:
space:
mode:
Diffstat (limited to 'Eigen/src/Core')
-rw-r--r--Eigen/src/Core/AssignEvaluator.h2
-rw-r--r--Eigen/src/Core/CwiseNullaryOp.h2
-rw-r--r--Eigen/src/Core/DiagonalMatrix.h3
-rw-r--r--Eigen/src/Core/MatrixBase.h4
-rw-r--r--Eigen/src/Core/PlainObjectBase.h8
-rw-r--r--Eigen/src/Core/TriangularMatrix.h16
-rw-r--r--Eigen/src/Core/VectorwiseOp.h2
-rw-r--r--Eigen/src/Core/functors/BinaryFunctors.h2
-rw-r--r--Eigen/src/Core/functors/UnaryFunctors.h2
-rw-r--r--Eigen/src/Core/products/GeneralMatrixMatrix.h50
-rw-r--r--Eigen/src/Core/products/Parallelizer.h19
-rw-r--r--Eigen/src/Core/util/Macros.h2
12 files changed, 60 insertions, 52 deletions
diff --git a/Eigen/src/Core/AssignEvaluator.h b/Eigen/src/Core/AssignEvaluator.h
index b7cc7c0e9..abad8c790 100644
--- a/Eigen/src/Core/AssignEvaluator.h
+++ b/Eigen/src/Core/AssignEvaluator.h
@@ -554,7 +554,7 @@ struct dense_assignment_loop<Kernel, SliceVectorizedTraversal, NoUnrolling>
for(Index inner = alignedEnd; inner<innerSize ; ++inner)
kernel.assignCoeffByOuterInner(outer, inner);
- alignedStart = std::min<Index>((alignedStart+alignedStep)%packetSize, innerSize);
+ alignedStart = numext::mini((alignedStart+alignedStep)%packetSize, innerSize);
}
}
};
diff --git a/Eigen/src/Core/CwiseNullaryOp.h b/Eigen/src/Core/CwiseNullaryOp.h
index 25c3ef3d7..1caf37bb7 100644
--- a/Eigen/src/Core/CwiseNullaryOp.h
+++ b/Eigen/src/Core/CwiseNullaryOp.h
@@ -752,7 +752,7 @@ struct setIdentity_impl<Derived, true>
static EIGEN_STRONG_INLINE Derived& run(Derived& m)
{
m.setZero();
- const Index size = (std::min)(m.rows(), m.cols());
+ const Index size = numext::mini(m.rows(), m.cols());
for(Index i = 0; i < size; ++i) m.coeffRef(i,i) = typename Derived::Scalar(1);
return m;
}
diff --git a/Eigen/src/Core/DiagonalMatrix.h b/Eigen/src/Core/DiagonalMatrix.h
index 92b2eee71..c682c6d7f 100644
--- a/Eigen/src/Core/DiagonalMatrix.h
+++ b/Eigen/src/Core/DiagonalMatrix.h
@@ -290,12 +290,11 @@ MatrixBase<Derived>::asDiagonal() const
template<typename Derived>
bool MatrixBase<Derived>::isDiagonal(const RealScalar& prec) const
{
- using std::abs;
if(cols() != rows()) return false;
RealScalar maxAbsOnDiagonal = static_cast<RealScalar>(-1);
for(Index j = 0; j < cols(); ++j)
{
- RealScalar absOnDiagonal = abs(coeff(j,j));
+ RealScalar absOnDiagonal = numext::abs(coeff(j,j));
if(absOnDiagonal > maxAbsOnDiagonal) maxAbsOnDiagonal = absOnDiagonal;
}
for(Index j = 0; j < cols(); ++j)
diff --git a/Eigen/src/Core/MatrixBase.h b/Eigen/src/Core/MatrixBase.h
index d56df8249..f7cf04cde 100644
--- a/Eigen/src/Core/MatrixBase.h
+++ b/Eigen/src/Core/MatrixBase.h
@@ -399,12 +399,14 @@ template<typename Derived> class MatrixBase
EIGEN_DEVICE_FUNC
inline PlainObject unitOrthogonal(void) const;
+ EIGEN_DEVICE_FUNC
inline Matrix<Scalar,3,1> eulerAngles(Index a0, Index a1, Index a2) const;
// put this as separate enum value to work around possible GCC 4.3 bug (?)
enum { HomogeneousReturnTypeDirection = ColsAtCompileTime==1&&RowsAtCompileTime==1 ? ((internal::traits<Derived>::Flags&RowMajorBit)==RowMajorBit ? Horizontal : Vertical)
: ColsAtCompileTime==1 ? Vertical : Horizontal };
typedef Homogeneous<Derived, HomogeneousReturnTypeDirection> HomogeneousReturnType;
+ EIGEN_DEVICE_FUNC
inline HomogeneousReturnType homogeneous() const;
enum {
@@ -414,7 +416,7 @@ template<typename Derived> class MatrixBase
internal::traits<Derived>::ColsAtCompileTime==1 ? SizeMinusOne : 1,
internal::traits<Derived>::ColsAtCompileTime==1 ? 1 : SizeMinusOne> ConstStartMinusOne;
typedef EIGEN_EXPR_BINARYOP_SCALAR_RETURN_TYPE(ConstStartMinusOne,Scalar,quotient) HNormalizedReturnType;
-
+ EIGEN_DEVICE_FUNC
inline const HNormalizedReturnType hnormalized() const;
////////// Householder module ///////////
diff --git a/Eigen/src/Core/PlainObjectBase.h b/Eigen/src/Core/PlainObjectBase.h
index 55b4ac057..2dcd929e6 100644
--- a/Eigen/src/Core/PlainObjectBase.h
+++ b/Eigen/src/Core/PlainObjectBase.h
@@ -916,8 +916,8 @@ struct conservative_resize_like_impl
{
// The storage order does not allow us to use reallocation.
typename Derived::PlainObject tmp(rows,cols);
- const Index common_rows = (std::min)(rows, _this.rows());
- const Index common_cols = (std::min)(cols, _this.cols());
+ const Index common_rows = numext::mini(rows, _this.rows());
+ const Index common_cols = numext::mini(cols, _this.cols());
tmp.block(0,0,common_rows,common_cols) = _this.block(0,0,common_rows,common_cols);
_this.derived().swap(tmp);
}
@@ -950,8 +950,8 @@ struct conservative_resize_like_impl
{
// The storage order does not allow us to use reallocation.
typename Derived::PlainObject tmp(other);
- const Index common_rows = (std::min)(tmp.rows(), _this.rows());
- const Index common_cols = (std::min)(tmp.cols(), _this.cols());
+ const Index common_rows = numext::mini(tmp.rows(), _this.rows());
+ const Index common_cols = numext::mini(tmp.cols(), _this.cols());
tmp.block(0,0,common_rows,common_cols) = _this.block(0,0,common_rows,common_cols);
_this.derived().swap(tmp);
}
diff --git a/Eigen/src/Core/TriangularMatrix.h b/Eigen/src/Core/TriangularMatrix.h
index e9606ec33..71f5d4f29 100644
--- a/Eigen/src/Core/TriangularMatrix.h
+++ b/Eigen/src/Core/TriangularMatrix.h
@@ -641,21 +641,20 @@ MatrixBase<Derived>::triangularView() const
template<typename Derived>
bool MatrixBase<Derived>::isUpperTriangular(const RealScalar& prec) const
{
- using std::abs;
RealScalar maxAbsOnUpperPart = static_cast<RealScalar>(-1);
for(Index j = 0; j < cols(); ++j)
{
- Index maxi = (std::min)(j, rows()-1);
+ Index maxi = numext::mini(j, rows()-1);
for(Index i = 0; i <= maxi; ++i)
{
- RealScalar absValue = abs(coeff(i,j));
+ RealScalar absValue = numext::abs(coeff(i,j));
if(absValue > maxAbsOnUpperPart) maxAbsOnUpperPart = absValue;
}
}
RealScalar threshold = maxAbsOnUpperPart * prec;
for(Index j = 0; j < cols(); ++j)
for(Index i = j+1; i < rows(); ++i)
- if(abs(coeff(i, j)) > threshold) return false;
+ if(numext::abs(coeff(i, j)) > threshold) return false;
return true;
}
@@ -667,20 +666,19 @@ bool MatrixBase<Derived>::isUpperTriangular(const RealScalar& prec) const
template<typename Derived>
bool MatrixBase<Derived>::isLowerTriangular(const RealScalar& prec) const
{
- using std::abs;
RealScalar maxAbsOnLowerPart = static_cast<RealScalar>(-1);
for(Index j = 0; j < cols(); ++j)
for(Index i = j; i < rows(); ++i)
{
- RealScalar absValue = abs(coeff(i,j));
+ RealScalar absValue = numext::abs(coeff(i,j));
if(absValue > maxAbsOnLowerPart) maxAbsOnLowerPart = absValue;
}
RealScalar threshold = maxAbsOnLowerPart * prec;
for(Index j = 1; j < cols(); ++j)
{
- Index maxi = (std::min)(j, rows()-1);
+ Index maxi = numext::mini(j, rows()-1);
for(Index i = 0; i < maxi; ++i)
- if(abs(coeff(i, j)) > threshold) return false;
+ if(numext::abs(coeff(i, j)) > threshold) return false;
}
return true;
}
@@ -893,7 +891,7 @@ struct triangular_assignment_loop<Kernel, Mode, Dynamic, SetOpposite>
{
for(Index j = 0; j < kernel.cols(); ++j)
{
- Index maxi = (std::min)(j, kernel.rows());
+ Index maxi = numext::mini(j, kernel.rows());
Index i = 0;
if (((Mode&Lower) && SetOpposite) || (Mode&Upper))
{
diff --git a/Eigen/src/Core/VectorwiseOp.h b/Eigen/src/Core/VectorwiseOp.h
index dd382e990..14f403594 100644
--- a/Eigen/src/Core/VectorwiseOp.h
+++ b/Eigen/src/Core/VectorwiseOp.h
@@ -625,6 +625,7 @@ template<typename ExpressionType, int Direction> class VectorwiseOp
/////////// Geometry module ///////////
typedef Homogeneous<ExpressionType,Direction> HomogeneousReturnType;
+ EIGEN_DEVICE_FUNC
HomogeneousReturnType homogeneous() const;
typedef typename ExpressionType::PlainObject CrossReturnType;
@@ -654,6 +655,7 @@ template<typename ExpressionType, int Direction> class VectorwiseOp
Direction==Horizontal ? HNormalized_SizeMinusOne : 1> >
HNormalizedReturnType;
+ EIGEN_DEVICE_FUNC
const HNormalizedReturnType hnormalized() const;
protected:
diff --git a/Eigen/src/Core/functors/BinaryFunctors.h b/Eigen/src/Core/functors/BinaryFunctors.h
index d82ffed02..96747bac7 100644
--- a/Eigen/src/Core/functors/BinaryFunctors.h
+++ b/Eigen/src/Core/functors/BinaryFunctors.h
@@ -266,7 +266,7 @@ struct scalar_hypot_op<Scalar,Scalar> : binary_op_base<Scalar,Scalar>
// typedef typename NumTraits<Scalar>::Real result_type;
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& _x, const Scalar& _y) const
{
- using std::sqrt;
+ EIGEN_USING_STD_MATH(sqrt)
Scalar p, qp;
if(_x>_y)
{
diff --git a/Eigen/src/Core/functors/UnaryFunctors.h b/Eigen/src/Core/functors/UnaryFunctors.h
index 2009f8e57..2e6a00ffd 100644
--- a/Eigen/src/Core/functors/UnaryFunctors.h
+++ b/Eigen/src/Core/functors/UnaryFunctors.h
@@ -321,7 +321,7 @@ struct functor_traits<scalar_log1p_op<Scalar> > {
*/
template<typename Scalar> struct scalar_log10_op {
EIGEN_EMPTY_STRUCT_CTOR(scalar_log10_op)
- EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const { using std::log10; return log10(a); }
+ EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const { EIGEN_USING_STD_MATH(log10) return log10(a); }
template <typename Packet>
EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::plog10(a); }
};
diff --git a/Eigen/src/Core/products/GeneralMatrixMatrix.h b/Eigen/src/Core/products/GeneralMatrixMatrix.h
index b1465c3b5..61df3be57 100644
--- a/Eigen/src/Core/products/GeneralMatrixMatrix.h
+++ b/Eigen/src/Core/products/GeneralMatrixMatrix.h
@@ -10,7 +10,7 @@
#ifndef EIGEN_GENERAL_MATRIX_MATRIX_H
#define EIGEN_GENERAL_MATRIX_MATRIX_H
-namespace Eigen {
+namespace Eigen {
namespace internal {
@@ -24,7 +24,7 @@ template<
struct general_matrix_matrix_product<Index,LhsScalar,LhsStorageOrder,ConjugateLhs,RhsScalar,RhsStorageOrder,ConjugateRhs,RowMajor>
{
typedef gebp_traits<RhsScalar,LhsScalar> Traits;
-
+
typedef typename ScalarBinaryOpTraits<LhsScalar, RhsScalar>::ReturnType ResScalar;
static EIGEN_STRONG_INLINE void run(
Index rows, Index cols, Index depth,
@@ -54,7 +54,7 @@ struct general_matrix_matrix_product<Index,LhsScalar,LhsStorageOrder,ConjugateLh
{
typedef gebp_traits<LhsScalar,RhsScalar> Traits;
-
+
typedef typename ScalarBinaryOpTraits<LhsScalar, RhsScalar>::ReturnType ResScalar;
static void run(Index rows, Index cols, Index depth,
const LhsScalar* _lhs, Index lhsStride,
@@ -85,13 +85,13 @@ static void run(Index rows, Index cols, Index depth,
// this is the parallel version!
Index tid = omp_get_thread_num();
Index threads = omp_get_num_threads();
-
+
LhsScalar* blockA = blocking.blockA();
eigen_internal_assert(blockA!=0);
-
+
std::size_t sizeB = kc*nc;
ei_declare_aligned_stack_constructed_variable(RhsScalar, blockB, sizeB, 0);
-
+
// For each horizontal panel of the rhs, and corresponding vertical panel of the lhs...
for(Index k=0; k<depth; k+=kc)
{
@@ -114,7 +114,7 @@ static void run(Index rows, Index cols, Index depth,
// Notify the other threads that the part A'_i is ready to go.
info[tid].sync = k;
-
+
// Computes C_i += A' * B' per A'_i
for(Index shift=0; shift<threads; ++shift)
{
@@ -161,7 +161,7 @@ static void run(Index rows, Index cols, Index depth,
ei_declare_aligned_stack_constructed_variable(LhsScalar, blockA, sizeA, blocking.blockA());
ei_declare_aligned_stack_constructed_variable(RhsScalar, blockB, sizeB, blocking.blockB());
-
+
const bool pack_rhs_once = mc!=rows && kc==depth && nc==cols;
// For each horizontal panel of the rhs, and corresponding panel of the lhs...
@@ -172,24 +172,24 @@ static void run(Index rows, Index cols, Index depth,
for(Index k2=0; k2<depth; k2+=kc)
{
const Index actual_kc = (std::min)(k2+kc,depth)-k2;
-
+
// OK, here we have selected one horizontal panel of rhs and one vertical panel of lhs.
// => Pack lhs's panel into a sequential chunk of memory (L2/L3 caching)
// Note that this panel will be read as many times as the number of blocks in the rhs's
// horizontal panel which is, in practice, a very low number.
pack_lhs(blockA, lhs.getSubMapper(i2,k2), actual_kc, actual_mc);
-
+
// For each kc x nc block of the rhs's horizontal panel...
for(Index j2=0; j2<cols; j2+=nc)
{
const Index actual_nc = (std::min)(j2+nc,cols)-j2;
-
+
// We pack the rhs's block into a sequential chunk of memory (L2 caching)
// Note that this block will be read a very high number of times, which is equal to the number of
// micro horizontal panel of the large rhs's panel (e.g., rows/12 times).
if((!pack_rhs_once) || i2==0)
pack_rhs(blockB, rhs.getSubMapper(k2,j2), actual_kc, actual_nc);
-
+
// Everything is packed, we can now call the panel * block kernel:
gebp(res.getSubMapper(i2, j2), blockA, blockB, actual_mc, actual_kc, actual_nc, alpha);
}
@@ -229,7 +229,7 @@ struct gemm_functor
(Scalar*)&(m_dest.coeffRef(row,col)), m_dest.outerStride(),
m_actualAlpha, m_blocking, info);
}
-
+
typedef typename Gemm::Traits Traits;
protected:
@@ -313,7 +313,7 @@ class gemm_blocking_space<StorageOrder,_LhsScalar,_RhsScalar,MaxRows, MaxCols, M
this->m_blockB = reinterpret_cast<RhsScalar*>((internal::UIntPtr(m_staticB) + (EIGEN_DEFAULT_ALIGN_BYTES-1)) & ~std::size_t(EIGEN_DEFAULT_ALIGN_BYTES-1));
#endif
}
-
+
void initParallel(Index, Index, Index, Index)
{}
@@ -359,14 +359,14 @@ class gemm_blocking_space<StorageOrder,_LhsScalar,_RhsScalar,MaxRows, MaxCols, M
m_sizeA = this->m_mc * this->m_kc;
m_sizeB = this->m_kc * this->m_nc;
}
-
+
void initParallel(Index rows, Index cols, Index depth, Index num_threads)
{
this->m_mc = Transpose ? cols : rows;
this->m_nc = Transpose ? rows : cols;
this->m_kc = depth;
-
- eigen_internal_assert(this->m_blockA==0 && this->m_blockB==0);
+
+ eigen_internal_assert(this->m_blockA==0 && this->m_blockB==0);
Index m = this->m_mc;
computeProductBlockingSizes<LhsScalar,RhsScalar,KcFactor>(this->m_kc, m, this->m_nc, num_threads);
m_sizeA = this->m_mc * this->m_kc;
@@ -401,7 +401,7 @@ class gemm_blocking_space<StorageOrder,_LhsScalar,_RhsScalar,MaxRows, MaxCols, M
} // end namespace internal
namespace internal {
-
+
template<typename Lhs, typename Rhs>
struct generic_product_impl<Lhs,Rhs,DenseShape,DenseShape,GemmProduct>
: generic_product_impl_base<Lhs,Rhs,generic_product_impl<Lhs,Rhs,DenseShape,DenseShape,GemmProduct> >
@@ -409,21 +409,21 @@ struct generic_product_impl<Lhs,Rhs,DenseShape,DenseShape,GemmProduct>
typedef typename Product<Lhs,Rhs>::Scalar Scalar;
typedef typename Lhs::Scalar LhsScalar;
typedef typename Rhs::Scalar RhsScalar;
-
+
typedef internal::blas_traits<Lhs> LhsBlasTraits;
typedef typename LhsBlasTraits::DirectLinearAccessType ActualLhsType;
typedef typename internal::remove_all<ActualLhsType>::type ActualLhsTypeCleaned;
-
+
typedef internal::blas_traits<Rhs> RhsBlasTraits;
typedef typename RhsBlasTraits::DirectLinearAccessType ActualRhsType;
typedef typename internal::remove_all<ActualRhsType>::type ActualRhsTypeCleaned;
-
+
enum {
MaxDepthAtCompileTime = EIGEN_SIZE_MIN_PREFER_FIXED(Lhs::MaxColsAtCompileTime,Rhs::MaxRowsAtCompileTime)
};
-
+
typedef generic_product_impl<Lhs,Rhs,DenseShape,DenseShape,CoeffBasedProductMode> lazyproduct;
-
+
template<typename Dst>
static void evalTo(Dst& dst, const Lhs& lhs, const Rhs& rhs)
{
@@ -453,7 +453,7 @@ struct generic_product_impl<Lhs,Rhs,DenseShape,DenseShape,GemmProduct>
else
scaleAndAddTo(dst, lhs, rhs, Scalar(-1));
}
-
+
template<typename Dest>
static void scaleAndAddTo(Dest& dst, const Lhs& a_lhs, const Rhs& a_rhs, const Scalar& alpha)
{
@@ -481,7 +481,7 @@ struct generic_product_impl<Lhs,Rhs,DenseShape,DenseShape,GemmProduct>
BlockingType blocking(dst.rows(), dst.cols(), lhs.cols(), 1, true);
internal::parallelize_gemm<(Dest::MaxRowsAtCompileTime>32 || Dest::MaxRowsAtCompileTime==Dynamic)>
- (GemmFunctor(lhs, rhs, dst, actualAlpha, blocking), a_lhs.rows(), a_rhs.cols(), Dest::Flags&RowMajorBit);
+ (GemmFunctor(lhs, rhs, dst, actualAlpha, blocking), a_lhs.rows(), a_rhs.cols(), a_lhs.cols(), Dest::Flags&RowMajorBit);
}
};
diff --git a/Eigen/src/Core/products/Parallelizer.h b/Eigen/src/Core/products/Parallelizer.h
index e0bfcc356..2a31e4cbe 100644
--- a/Eigen/src/Core/products/Parallelizer.h
+++ b/Eigen/src/Core/products/Parallelizer.h
@@ -10,7 +10,7 @@
#ifndef EIGEN_PARALLELIZER_H
#define EIGEN_PARALLELIZER_H
-namespace Eigen {
+namespace Eigen {
namespace internal {
@@ -83,7 +83,7 @@ template<typename Index> struct GemmParallelInfo
};
template<bool Condition, typename Functor, typename Index>
-void parallelize_gemm(const Functor& func, Index rows, Index cols, bool transpose)
+void parallelize_gemm(const Functor& func, Index rows, Index cols, Index depth, bool transpose)
{
// TODO when EIGEN_USE_BLAS is defined,
// we should still enable OMP for other scalar types
@@ -92,6 +92,7 @@ void parallelize_gemm(const Functor& func, Index rows, Index cols, bool transpos
// the matrix product when multithreading is enabled. This is a temporary
// fix to support row-major destination matrices. This whole
// parallelizer mechanism has to be redisigned anyway.
+ EIGEN_UNUSED_VARIABLE(depth);
EIGEN_UNUSED_VARIABLE(transpose);
func(0,rows, 0,cols);
#else
@@ -106,6 +107,12 @@ void parallelize_gemm(const Functor& func, Index rows, Index cols, bool transpos
// FIXME this has to be fine tuned
Index size = transpose ? rows : cols;
Index pb_max_threads = std::max<Index>(1,size / 32);
+ // compute the maximal number of threads from the total amount of work:
+ double work = static_cast<double>(rows) * static_cast<double>(cols) *
+ static_cast<double>(depth);
+ double kMinTaskSize = 50000; // Heuristic.
+ pb_max_threads = std::max<Index>(1, std::min<Index>(pb_max_threads, work / kMinTaskSize));
+
// compute the number of threads we are going to use
Index threads = std::min<Index>(nbThreads(), pb_max_threads);
@@ -120,19 +127,19 @@ void parallelize_gemm(const Functor& func, Index rows, Index cols, bool transpos
if(transpose)
std::swap(rows,cols);
-
+
ei_declare_aligned_stack_constructed_variable(GemmParallelInfo<Index>,info,threads,0);
-
+
#pragma omp parallel num_threads(threads)
{
Index i = omp_get_thread_num();
// Note that the actual number of threads might be lower than the number of request ones.
Index actual_threads = omp_get_num_threads();
-
+
Index blockCols = (cols / actual_threads) & ~Index(0x3);
Index blockRows = (rows / actual_threads);
blockRows = (blockRows/Functor::Traits::mr)*Functor::Traits::mr;
-
+
Index r0 = i*blockRows;
Index actualBlockRows = (i+1==actual_threads) ? rows-r0 : blockRows;
diff --git a/Eigen/src/Core/util/Macros.h b/Eigen/src/Core/util/Macros.h
index 318ab9477..ce715716c 100644
--- a/Eigen/src/Core/util/Macros.h
+++ b/Eigen/src/Core/util/Macros.h
@@ -801,7 +801,7 @@ namespace Eigen {
// just an empty macro !
#define EIGEN_EMPTY
-#if EIGEN_COMP_MSVC_STRICT && EIGEN_COMP_MSVC < 1900 // for older MSVC versions using the base operator is sufficient (cf Bug 1000)
+#if EIGEN_COMP_MSVC_STRICT && (EIGEN_COMP_MSVC < 1900 || __CUDACC_VER__) // for older MSVC versions, as well as 1900 && CUDA 8, using the base operator is sufficient (cf Bugs 1000, 1324)
#define EIGEN_INHERIT_ASSIGNMENT_EQUAL_OPERATOR(Derived) \
using Base::operator =;
#elif EIGEN_COMP_CLANG // workaround clang bug (see http://forum.kde.org/viewtopic.php?f=74&t=102653)