diff options
author | Benoit Jacob <jacob.benoit.1@gmail.com> | 2011-02-18 09:46:49 -0500 |
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committer | Benoit Jacob <jacob.benoit.1@gmail.com> | 2011-02-18 09:46:49 -0500 |
commit | aa966ca319bb2cce3f7f1eef0062fb7bc7534b6e (patch) | |
tree | 2445b33287e79af9597a80ecc3d3bab8f337ee74 /test/stable_norm.cpp | |
parent | 8f8c67b8bd2915d1927c848e557e5076a00e25f9 (diff) |
fix bug #187: stable norm test was quite broken
Diffstat (limited to 'test/stable_norm.cpp')
-rw-r--r-- | test/stable_norm.cpp | 28 |
1 files changed, 13 insertions, 15 deletions
diff --git a/test/stable_norm.cpp b/test/stable_norm.cpp index 69e4a1b12..4480c5203 100644 --- a/test/stable_norm.cpp +++ b/test/stable_norm.cpp @@ -24,9 +24,19 @@ #include "main.h" +template<typename T> bool isNotNaN(const T& x) +{ + return x==x; +} + template<typename T> bool isFinite(const T& x) { - return x==x && x>=NumTraits<T>::lowest() && x<=NumTraits<T>::highest(); + return isNotNaN(x-x); +} + +template<typename T> EIGEN_DONT_INLINE T copy(const T& x) +{ + return x; } template<typename MatrixType> void stable_norm(const MatrixType& m) @@ -79,26 +89,14 @@ template<typename MatrixType> void stable_norm(const MatrixType& m) // test overflow VERIFY(isFinite(internal::sqrt(size)*internal::abs(big))); - #ifdef EIGEN_VECTORIZE_SSE - // since x87 FPU uses 80bits of precision overflow is not detected - if(internal::packet_traits<Scalar>::size>1) - { - VERIFY_IS_NOT_APPROX(static_cast<Scalar>(vbig.norm()), internal::sqrt(size)*big); // here the default norm must fail - } - #endif + VERIFY_IS_NOT_APPROX(internal::sqrt(copy(vbig.squaredNorm())), internal::abs(internal::sqrt(size)*big)); // here the default norm must fail VERIFY_IS_APPROX(vbig.stableNorm(), internal::sqrt(size)*internal::abs(big)); VERIFY_IS_APPROX(vbig.blueNorm(), internal::sqrt(size)*internal::abs(big)); VERIFY_IS_APPROX(vbig.hypotNorm(), internal::sqrt(size)*internal::abs(big)); // test underflow VERIFY(isFinite(internal::sqrt(size)*internal::abs(small))); - #ifdef EIGEN_VECTORIZE_SSE - // since x87 FPU uses 80bits of precision underflow is not detected - if(internal::packet_traits<Scalar>::size>1) - { - VERIFY_IS_NOT_APPROX(static_cast<Scalar>(vsmall.norm()), internal::sqrt(size)*small); // here the default norm must fail - } - #endif + VERIFY_IS_NOT_APPROX(internal::sqrt(copy(vsmall.squaredNorm())), internal::abs(internal::sqrt(size)*small)); // here the default norm must fail VERIFY_IS_APPROX(vsmall.stableNorm(), internal::sqrt(size)*internal::abs(small)); VERIFY_IS_APPROX(vsmall.blueNorm(), internal::sqrt(size)*internal::abs(small)); VERIFY_IS_APPROX(vsmall.hypotNorm(), internal::sqrt(size)*internal::abs(small)); |