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Workaround missalignment produced by first_aligned for PacketSize==1 and size==1

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This commit is contained in:
Gael Guennebaud 2015-06-23 10:10:17 +02:00
parent bb3a9b4941
commit 307c4fc292
1 changed files with 5 additions and 0 deletions
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5
Eigen/src/Core/StableNorm.h
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@ -157,6 +157,7 @@ inline typename NumTraits<typename internal::traits<Derived>::Scalar>::Real
MatrixBase<Derived>::stableNorm() const
{
using std::sqrt;
using std::abs;
const Index blockSize = 4096;
RealScalar scale(0);
RealScalar invScale(1);
@ -167,6 +168,10 @@ MatrixBase<Derived>::stableNorm() const
typedef typename internal::conditional<Alignment, Ref<const Matrix<Scalar,Dynamic,1,0,blockSize,1>, Aligned>,
typename Base::ConstSegmentReturnType>::type SegmentWrapper;
Index n = size();
if(n==1)
return abs(this->coeff(0));
Index bi = internal::first_aligned(derived());
if (bi>0)
internal::stable_norm_kernel(this->head(bi), ssq, scale, invScale);