bug #977: add stableNormalize[d] methods: they are analogues to normalize[d] but with carefull handling of under/over-flow

1 files changed, 14 insertions, 0 deletions

diff --git a/test/stable_norm.cpp b/test/stable_norm.cpp
index 7561ae8be..9f12320e0 100644
--- a/test/stable_norm.cpp
+++ b/test/stable_norm.cpp
@@ -163,6 +163,20 @@ template<typename MatrixType> void stable_norm(const MatrixType& m)
     VERIFY(!(numext::isfinite)(v.blueNorm()));      VERIFY((numext::isnan)(v.blueNorm()));
     VERIFY(!(numext::isfinite)(v.hypotNorm()));     VERIFY((numext::isnan)(v.hypotNorm()));
   }
+
+  // stableNormalize[d]
+  {
+    VERIFY_IS_APPROX(vrand.stableNormalized(), vrand.normalized());
+    MatrixType vcopy(vrand);
+    vcopy.stableNormalize();
+    VERIFY_IS_APPROX(vcopy, vrand.normalized());
+    VERIFY_IS_APPROX((vrand.stableNormalized()).norm(), RealScalar(1));
+    VERIFY_IS_APPROX(vcopy.norm(), RealScalar(1));
+    VERIFY_IS_APPROX((vbig.stableNormalized()).norm(), RealScalar(1));
+    VERIFY_IS_APPROX((vsmall.stableNormalized()).norm(), RealScalar(1));
+    VERIFY_IS_APPROX(vbig, vbig.stableNorm() * vbig.stableNormalized());
+    VERIFY_IS_APPROX(vsmall, vsmall.stableNorm() * vsmall.stableNormalized());
+  }
 }
 
 void test_stable_norm()