* Draft of a eigenvalues solver

  (does not support complex and does not re-use the QR decomposition)

* Rewrite the cache friendly product to have only one instance per scalar type !
  This significantly speeds up compilation time and reduces executable size.
  The current drawback is that some trivial expressions might be
  evaluated like conjugate or negate.

* Renamed "cache optimal" to "cache friendly"

* Added the ability to directly access matrix data of some expressions via:
  - the stride()/_stride() methods
  - DirectAccessBit flag (replace ReferencableBit)

1 files changed, 3 insertions, 3 deletions

diff --git a/Eigen/src/Core/util/Constants.h b/Eigen/src/Core/util/Constants.h
index 48498bfae..8aa16aa81 100644
--- a/Eigen/src/Core/util/Constants.h
+++ b/Eigen/src/Core/util/Constants.h
@@ -43,18 +43,18 @@ const unsigned int NullDiagBit = 0x40;      ///< means all diagonal coefficients
 const unsigned int UnitDiagBit = 0x80;      ///< means all diagonal coefficients are equal to 1
 const unsigned int NullLowerBit = 0x200;    ///< means the strictly triangular lower part is 0
 const unsigned int NullUpperBit = 0x400;    ///< means the strictly triangular upper part is 0
-const unsigned int ReferencableBit = 0x800; ///< means the expression is writable through MatrixBase::coeffRef(int,int)
+const unsigned int DirectAccessBit = 0x800; ///< means the underlying matrix data can be direclty accessed
 
 enum { Upper=NullLowerBit, Lower=NullUpperBit };
 enum { Aligned=0, UnAligned=1 };
 
 // list of flags that are lost by default
-const unsigned int DefaultLostFlagMask = ~(VectorizableBit | Like1DArrayBit | ReferencableBit
+const unsigned int DefaultLostFlagMask = ~(VectorizableBit | Like1DArrayBit | DirectAccessBit
   | NullDiagBit | UnitDiagBit | NullLowerBit | NullUpperBit);
 
 enum { ConditionalJumpCost = 5 };
 enum CornerType { TopLeft, TopRight, BottomLeft, BottomRight };
 enum DirectionType { Vertical, Horizontal };
-enum ProductEvaluationMode { NormalProduct, CacheOptimalProduct, LazyProduct};
+enum ProductEvaluationMode { NormalProduct, CacheFriendlyProduct, LazyProduct};
 
 #endif // EIGEN_CONSTANTS_H