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Workaround broken complex*real product on old clang versions

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This commit is contained in:
Gael Guennebaud 2015-06-17 16:11:58 +02:00
parent 40f326ef2e
commit bb6acc561e
1 changed files with 20 additions and 2 deletions
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22
test/stable_norm.cpp
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@ -24,6 +24,8 @@ template<typename MatrixType> void stable_norm(const MatrixType& m)
typedef typename MatrixType::Index Index;
typedef typename MatrixType::Scalar Scalar;
typedef typename NumTraits<Scalar>::Real RealScalar;
bool complex_real_product_ok = true;
// Check the basic machine-dependent constants.
{
@ -36,6 +38,16 @@ template<typename MatrixType> void stable_norm(const MatrixType& m)
VERIFY( (!(iemin > 1 - 2*it || 1+it>iemax || (it==2 && ibeta<5) || (it<=4 && ibeta <= 3 ) || it<2))
&& "the stable norm algorithm cannot be guaranteed on this computer");
Scalar inf = std::numeric_limits<RealScalar>::infinity();
if(NumTraits<Scalar>::IsComplex && numext::isnan(inf*RealScalar(1)) )
{
complex_real_product_ok = false;
static bool first = true;
if(first)
std::cerr << "WARNING: compiler mess up complex*real product, " << inf << " * " << 1.0 << " = " << inf*RealScalar(1) << std::endl;
first = false;
}
}
@ -116,7 +128,10 @@ template<typename MatrixType> void stable_norm(const MatrixType& m)
v(i,j) = std::numeric_limits<RealScalar>::infinity();
VERIFY(!numext::isfinite(v.squaredNorm())); VERIFY(isPlusInf(v.squaredNorm()));
VERIFY(!numext::isfinite(v.norm())); VERIFY(isPlusInf(v.norm()));
VERIFY(!numext::isfinite(v.stableNorm())); VERIFY(isPlusInf(v.stableNorm()));
VERIFY(!numext::isfinite(v.stableNorm()));
if(complex_real_product_ok){
VERIFY(isPlusInf(v.stableNorm()));
}
VERIFY(!numext::isfinite(v.blueNorm())); VERIFY(isPlusInf(v.blueNorm()));
VERIFY(!numext::isfinite(v.hypotNorm())); VERIFY(isPlusInf(v.hypotNorm()));
}
@ -127,7 +142,10 @@ template<typename MatrixType> void stable_norm(const MatrixType& m)
v(i,j) = -std::numeric_limits<RealScalar>::infinity();
VERIFY(!numext::isfinite(v.squaredNorm())); VERIFY(isPlusInf(v.squaredNorm()));
VERIFY(!numext::isfinite(v.norm())); VERIFY(isPlusInf(v.norm()));
VERIFY(!numext::isfinite(v.stableNorm())); VERIFY(isPlusInf(v.stableNorm()));
VERIFY(!numext::isfinite(v.stableNorm()));
if(complex_real_product_ok) {
VERIFY(isPlusInf(v.stableNorm()));
}
VERIFY(!numext::isfinite(v.blueNorm())); VERIFY(isPlusInf(v.blueNorm()));
VERIFY(!numext::isfinite(v.hypotNorm())); VERIFY(isPlusInf(v.hypotNorm()));
}