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Avoid implicit scalar conversion with accuracy loss in pow(scalar,array)

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This commit is contained in:
Gael Guennebaud 2017-06-12 16:47:22 +02:00
parent 50e09cca0f
commit 6dcf966558
1 changed files with 23 additions and 26 deletions
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45
Eigen/src/Core/GlobalFunctions.h
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@ -104,16 +104,17 @@ namespace Eigen
pow(const Eigen::ArrayBase<Derived>& x, const ScalarExponent& exponent); pow(const Eigen::ArrayBase<Derived>& x, const ScalarExponent& exponent);
#else #else
template <typename Derived,typename ScalarExponent> template <typename Derived,typename ScalarExponent>
inline typename internal::enable_if< !(internal::is_same<typename Derived::Scalar,ScalarExponent>::value) && EIGEN_SCALAR_BINARY_SUPPORTED(pow,typename Derived::Scalar,ScalarExponent), EIGEN_DEVICE_FUNC inline
const EIGEN_EXPR_BINARYOP_SCALAR_RETURN_TYPE(Derived,ScalarExponent,pow) >::type EIGEN_MSVC10_WORKAROUND_BINARYOP_RETURN_TYPE(
pow(const Eigen::ArrayBase<Derived>& x, const ScalarExponent& exponent) { const EIGEN_EXPR_BINARYOP_SCALAR_RETURN_TYPE(Derived,typename internal::promote_scalar_arg<typename Derived::Scalar
return x.derived().pow(exponent); EIGEN_COMMA ScalarExponent EIGEN_COMMA
} EIGEN_SCALAR_BINARY_SUPPORTED(pow,typename Derived::Scalar,ScalarExponent)>::type,pow))
pow(const Eigen::ArrayBase<Derived>& x, const ScalarExponent& exponent)
template<typename Derived> {
inline const EIGEN_EXPR_BINARYOP_SCALAR_RETURN_TYPE(Derived,typename Derived::Scalar,pow) typedef typename internal::promote_scalar_arg<typename Derived::Scalar,ScalarExponent,
pow(const Eigen::ArrayBase<Derived>& x, const typename Derived::Scalar& exponent) { EIGEN_SCALAR_BINARY_SUPPORTED(pow,typename Derived::Scalar,ScalarExponent)>::type PromotedExponent;
return x.derived().pow(exponent); return EIGEN_EXPR_BINARYOP_SCALAR_RETURN_TYPE(Derived,PromotedExponent,pow)(x.derived(),
typename internal::plain_constant_type<Derived,PromotedExponent>::type(x.derived().rows(), x.derived().cols(), internal::scalar_constant_op<PromotedExponent>(exponent)));
} }
#endif #endif
@ -157,20 +158,16 @@ namespace Eigen
pow(const Scalar& x,const Eigen::ArrayBase<Derived>& x); pow(const Scalar& x,const Eigen::ArrayBase<Derived>& x);
#else #else
template <typename Scalar, typename Derived> template <typename Scalar, typename Derived>
inline typename internal::enable_if< !(internal::is_same<typename Derived::Scalar,Scalar>::value) && EIGEN_SCALAR_BINARY_SUPPORTED(pow,Scalar,typename Derived::Scalar), EIGEN_DEVICE_FUNC inline
const EIGEN_SCALAR_BINARYOP_EXPR_RETURN_TYPE(Scalar,Derived,pow) >::type EIGEN_MSVC10_WORKAROUND_BINARYOP_RETURN_TYPE(
pow(const Scalar& x, const Eigen::ArrayBase<Derived>& exponents) const EIGEN_SCALAR_BINARYOP_EXPR_RETURN_TYPE(typename internal::promote_scalar_arg<typename Derived::Scalar
{ EIGEN_COMMA Scalar EIGEN_COMMA
return EIGEN_SCALAR_BINARYOP_EXPR_RETURN_TYPE(Scalar,Derived,pow)( EIGEN_SCALAR_BINARY_SUPPORTED(pow,Scalar,typename Derived::Scalar)>::type,Derived,pow))
typename internal::plain_constant_type<Derived,Scalar>::type(exponents.rows(), exponents.cols(), x), exponents.derived() ); pow(const Scalar& x, const Eigen::ArrayBase<Derived>& exponents) {
} typedef typename internal::promote_scalar_arg<typename Derived::Scalar,Scalar,
EIGEN_SCALAR_BINARY_SUPPORTED(pow,Scalar,typename Derived::Scalar)>::type PromotedScalar;
template<typename Derived> return EIGEN_SCALAR_BINARYOP_EXPR_RETURN_TYPE(PromotedScalar,Derived,pow)(
inline const EIGEN_SCALAR_BINARYOP_EXPR_RETURN_TYPE(typename Derived::Scalar,Derived,pow) typename internal::plain_constant_type<Derived,PromotedScalar>::type(exponents.derived().rows(), exponents.derived().cols(), internal::scalar_constant_op<PromotedScalar>(x)), exponents.derived());
pow(const typename Derived::Scalar& x, const Eigen::ArrayBase<Derived>& exponents)
{
return EIGEN_SCALAR_BINARYOP_EXPR_RETURN_TYPE(typename Derived::Scalar,Derived,pow)(
typename internal::plain_constant_type<Derived,typename Derived::Scalar>::type(exponents.rows(), exponents.cols(), x), exponents.derived() );
} }
#endif #endif