devtools/eigen
1
0
Fork 0
mirror of https://gitlab.com/libeigen/eigen.git synced 2026-04-10 11:34:33 +08:00
Code Issues Packages Projects Releases Wiki Activity

Fix hypot() and hypotNorm() wrt NaN and INF values.

Browse Source
This commit is contained in:
Gael Guennebaud
2014-09-02 16:09:39 +02:00
parent a44a343f03
commit 42e27d41a2
3 changed files with 26 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
Eigen/src/Core/MathFunctions.h
View File

@@ -308,10 +308,17 @@ struct hypot_impl
using std::sqrt;
RealScalar _x = abs(x);
RealScalar _y = abs(y);
RealScalar p = (max)(_x, _y);
if(p==RealScalar(0)) return 0;
RealScalar q = (min)(_x, _y);
RealScalar qp = q/p;
Scalar p, qp;
if(_x>_y)
{
p = _x;
qp = _y / p;
}
else
{
p = _y;
qp = _x / p;
}
return p * sqrt(RealScalar(1) + qp*qp);
}
};

14
Eigen/src/Core/functors/BinaryFunctors.h
View File

@@ -167,9 +167,17 @@ template<typename Scalar> struct scalar_hypot_op {
EIGEN_USING_STD_MATH(max);
EIGEN_USING_STD_MATH(min);
using std::sqrt;
Scalar p = (max)(_x, _y);
Scalar q = (min)(_x, _y);
Scalar qp = q/p;
Scalar p, qp;
if(_x>_y)
{
p = _x;
qp = _y / p;
}
else
{
p = _y;
qp = _x / p;
}
return p * sqrt(Scalar(1) + qp*qp);
}
};