From 4091f6b25c5ad0ca3f7c00bd82bfd7ca1bbedee3 Mon Sep 17 00:00:00 2001
From: David Tellenbach <david.tellenbach@me.com>
Date: Fri, 9 Oct 2020 02:05:05 +0200
Subject: Drop EIGEN_USING_STD_MATH in favour of EIGEN_USING_STD

---
 Eigen/Core                                     |  2 +-
 Eigen/src/Core/Dot.h                           |  2 +-
 Eigen/src/Core/GenericPacketMath.h             | 30 ++++++------
 Eigen/src/Core/MathFunctions.h                 | 68 +++++++++++++-------------
 Eigen/src/Core/MathFunctionsImpl.h             |  4 +-
 Eigen/src/Core/functors/UnaryFunctors.h        |  2 +-
 Eigen/src/Core/util/Macros.h                   | 14 ------
 Eigen/src/Eigenvalues/SelfAdjointEigenSolver.h | 24 ++++-----
 Eigen/src/Geometry/AlignedBox.h                |  4 +-
 Eigen/src/Geometry/AngleAxis.h                 |  8 +--
 Eigen/src/Geometry/EulerAngles.h               |  6 +--
 Eigen/src/Geometry/ParametrizedLine.h          |  2 +-
 Eigen/src/Geometry/Quaternion.h                | 20 ++++----
 Eigen/src/Geometry/Rotation2D.h                |  6 +--
 14 files changed, 89 insertions(+), 103 deletions(-)

diff --git a/Eigen/Core b/Eigen/Core
index 7d1bdd6e8..ef778511c 100644
--- a/Eigen/Core
+++ b/Eigen/Core
@@ -22,7 +22,7 @@
 #include "src/Core/util/ConfigureVectorization.h"
 
 // We need cuda_runtime.h/hip_runtime.h to ensure that
-// the EIGEN_USING_STD_MATH macro works properly on the device side
+// the EIGEN_USING_STD macro works properly on the device side
 #if defined(EIGEN_CUDACC)
   #include <cuda_runtime.h>
 #elif defined(EIGEN_HIPCC)
diff --git a/Eigen/src/Core/Dot.h b/Eigen/src/Core/Dot.h
index 11da432b2..41a8cb437 100644
--- a/Eigen/src/Core/Dot.h
+++ b/Eigen/src/Core/Dot.h
@@ -207,7 +207,7 @@ struct lpNorm_selector
   EIGEN_DEVICE_FUNC
   static inline RealScalar run(const MatrixBase<Derived>& m)
   {
-    EIGEN_USING_STD_MATH(pow)
+    EIGEN_USING_STD(pow)
     return pow(m.cwiseAbs().array().pow(p).sum(), RealScalar(1)/p);
   }
 };
diff --git a/Eigen/src/Core/GenericPacketMath.h b/Eigen/src/Core/GenericPacketMath.h
index 7a84841fa..3c5810901 100644
--- a/Eigen/src/Core/GenericPacketMath.h
+++ b/Eigen/src/Core/GenericPacketMath.h
@@ -264,7 +264,7 @@ plogical_shift_left(const long int& a) { return a << N; }
 template <typename Packet>
 EIGEN_DEVICE_FUNC inline Packet pfrexp(const Packet& a, Packet& exponent) {
   int exp;
-  EIGEN_USING_STD_MATH(frexp);
+  EIGEN_USING_STD(frexp);
   Packet result = frexp(a, &exp);
   exponent = static_cast<Packet>(exp);
   return result;
@@ -275,7 +275,7 @@ EIGEN_DEVICE_FUNC inline Packet pfrexp(const Packet& a, Packet& exponent) {
   */
 template<typename Packet> EIGEN_DEVICE_FUNC inline Packet
 pldexp(const Packet &a, const Packet &exponent) {
-  EIGEN_USING_STD_MATH(ldexp)
+  EIGEN_USING_STD(ldexp)
   return ldexp(a, static_cast<int>(exponent));
 }
 
@@ -574,43 +574,43 @@ template<typename Packet> EIGEN_DEVICE_FUNC inline Packet pcplxflip(const Packet
 
 /** \internal \returns the sine of \a a (coeff-wise) */
 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
-Packet psin(const Packet& a) { EIGEN_USING_STD_MATH(sin); return sin(a); }
+Packet psin(const Packet& a) { EIGEN_USING_STD(sin); return sin(a); }
 
 /** \internal \returns the cosine of \a a (coeff-wise) */
 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
-Packet pcos(const Packet& a) { EIGEN_USING_STD_MATH(cos); return cos(a); }
+Packet pcos(const Packet& a) { EIGEN_USING_STD(cos); return cos(a); }
 
 /** \internal \returns the tan of \a a (coeff-wise) */
 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
-Packet ptan(const Packet& a) { EIGEN_USING_STD_MATH(tan); return tan(a); }
+Packet ptan(const Packet& a) { EIGEN_USING_STD(tan); return tan(a); }
 
 /** \internal \returns the arc sine of \a a (coeff-wise) */
 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
-Packet pasin(const Packet& a) { EIGEN_USING_STD_MATH(asin); return asin(a); }
+Packet pasin(const Packet& a) { EIGEN_USING_STD(asin); return asin(a); }
 
 /** \internal \returns the arc cosine of \a a (coeff-wise) */
 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
-Packet pacos(const Packet& a) { EIGEN_USING_STD_MATH(acos); return acos(a); }
+Packet pacos(const Packet& a) { EIGEN_USING_STD(acos); return acos(a); }
 
 /** \internal \returns the arc tangent of \a a (coeff-wise) */
 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
-Packet patan(const Packet& a) { EIGEN_USING_STD_MATH(atan); return atan(a); }
+Packet patan(const Packet& a) { EIGEN_USING_STD(atan); return atan(a); }
 
 /** \internal \returns the hyperbolic sine of \a a (coeff-wise) */
 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
-Packet psinh(const Packet& a) { EIGEN_USING_STD_MATH(sinh); return sinh(a); }
+Packet psinh(const Packet& a) { EIGEN_USING_STD(sinh); return sinh(a); }
 
 /** \internal \returns the hyperbolic cosine of \a a (coeff-wise) */
 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
-Packet pcosh(const Packet& a) { EIGEN_USING_STD_MATH(cosh); return cosh(a); }
+Packet pcosh(const Packet& a) { EIGEN_USING_STD(cosh); return cosh(a); }
 
 /** \internal \returns the hyperbolic tan of \a a (coeff-wise) */
 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
-Packet ptanh(const Packet& a) { EIGEN_USING_STD_MATH(tanh); return tanh(a); }
+Packet ptanh(const Packet& a) { EIGEN_USING_STD(tanh); return tanh(a); }
 
 /** \internal \returns the exp of \a a (coeff-wise) */
 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
-Packet pexp(const Packet& a) { EIGEN_USING_STD_MATH(exp); return exp(a); }
+Packet pexp(const Packet& a) { EIGEN_USING_STD(exp); return exp(a); }
 
 /** \internal \returns the expm1 of \a a (coeff-wise) */
 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
@@ -618,7 +618,7 @@ Packet pexpm1(const Packet& a) { return numext::expm1(a); }
 
 /** \internal \returns the log of \a a (coeff-wise) */
 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
-Packet plog(const Packet& a) { EIGEN_USING_STD_MATH(log); return log(a); }
+Packet plog(const Packet& a) { EIGEN_USING_STD(log); return log(a); }
 
 /** \internal \returns the log1p of \a a (coeff-wise) */
 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
@@ -626,11 +626,11 @@ Packet plog1p(const Packet& a) { return numext::log1p(a); }
 
 /** \internal \returns the log10 of \a a (coeff-wise) */
 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
-Packet plog10(const Packet& a) { EIGEN_USING_STD_MATH(log10); return log10(a); }
+Packet plog10(const Packet& a) { EIGEN_USING_STD(log10); return log10(a); }
 
 /** \internal \returns the square-root of \a a (coeff-wise) */
 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
-Packet psqrt(const Packet& a) { EIGEN_USING_STD_MATH(sqrt); return sqrt(a); }
+Packet psqrt(const Packet& a) { EIGEN_USING_STD(sqrt); return sqrt(a); }
 
 /** \internal \returns the reciprocal square-root of \a a (coeff-wise) */
 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
diff --git a/Eigen/src/Core/MathFunctions.h b/Eigen/src/Core/MathFunctions.h
index a727ea7ae..0b34ae923 100644
--- a/Eigen/src/Core/MathFunctions.h
+++ b/Eigen/src/Core/MathFunctions.h
@@ -335,7 +335,7 @@ struct norm1_default_impl<Scalar,true>
   EIGEN_DEVICE_FUNC
   static inline RealScalar run(const Scalar& x)
   {
-    EIGEN_USING_STD_MATH(abs);
+    EIGEN_USING_STD(abs);
     return abs(x.real()) + abs(x.imag());
   }
 };
@@ -346,7 +346,7 @@ struct norm1_default_impl<Scalar, false>
   EIGEN_DEVICE_FUNC
   static inline Scalar run(const Scalar& x)
   {
-    EIGEN_USING_STD_MATH(abs);
+    EIGEN_USING_STD(abs);
     return abs(x);
   }
 };
@@ -406,7 +406,7 @@ inline NewType cast(const OldType& x)
     static inline Scalar run(const Scalar& x)
     {
       EIGEN_STATIC_ASSERT((!NumTraits<Scalar>::IsComplex), NUMERIC_TYPE_MUST_BE_REAL)
-      EIGEN_USING_STD_MATH(round);
+      EIGEN_USING_STD(round);
       return Scalar(round(x));
     }
   };
@@ -418,8 +418,8 @@ inline NewType cast(const OldType& x)
     static inline Scalar run(const Scalar& x)
     {
       EIGEN_STATIC_ASSERT((!NumTraits<Scalar>::IsComplex), NUMERIC_TYPE_MUST_BE_REAL)
-      EIGEN_USING_STD_MATH(floor);
-      EIGEN_USING_STD_MATH(ceil);
+      EIGEN_USING_STD(floor);
+      EIGEN_USING_STD(ceil);
       return (x > Scalar(0)) ? floor(x + Scalar(0.5)) : ceil(x - Scalar(0.5));
     }
   };
@@ -442,7 +442,7 @@ struct rint_impl {
   {
     EIGEN_STATIC_ASSERT((!NumTraits<Scalar>::IsComplex), NUMERIC_TYPE_MUST_BE_REAL)
 #if EIGEN_HAS_CXX11_MATH
-      EIGEN_USING_STD_MATH(rint);
+      EIGEN_USING_STD(rint);
 #endif
     return rint(x);
   }
@@ -487,7 +487,7 @@ struct rint_retval
       // HIP does not seem to have a native device side implementation for the math routine "arg"
       using std::arg;
       #else 		  
-      EIGEN_USING_STD_MATH(arg);
+      EIGEN_USING_STD(arg);
       #endif
       return arg(x);
     }
@@ -510,7 +510,7 @@ struct rint_retval
     EIGEN_DEVICE_FUNC
     static inline RealScalar run(const Scalar& x)
     {
-      EIGEN_USING_STD_MATH(arg);
+      EIGEN_USING_STD(arg);
       return arg(x);
     }
   };
@@ -538,7 +538,7 @@ namespace std_fallback {
     EIGEN_STATIC_ASSERT_NON_INTEGER(Scalar)
     typedef typename NumTraits<Scalar>::Real RealScalar;
 
-    EIGEN_USING_STD_MATH(exp);
+    EIGEN_USING_STD(exp);
     Scalar u = exp(x);
     if (numext::equal_strict(u, Scalar(1))) {
       return x;
@@ -548,7 +548,7 @@ namespace std_fallback {
       return RealScalar(-1);
     }
 
-    EIGEN_USING_STD_MATH(log);
+    EIGEN_USING_STD(log);
     Scalar logu = log(u);
     return numext::equal_strict(u, logu) ? u : (u - RealScalar(1)) * x / logu;
   }
@@ -589,7 +589,7 @@ struct expm1_impl<std::complex<RealScalar> > {
     // TODO better use numext::expm1 and numext::sin (but that would require forward declarations or moving this specialization down).
     RealScalar erm1 = expm1_impl<RealScalar>::run(xr);
     RealScalar er = erm1 + RealScalar(1.);
-    EIGEN_USING_STD_MATH(sin);
+    EIGEN_USING_STD(sin);
     RealScalar sin2 = sin(xi / RealScalar(2.));
     sin2 = sin2 * sin2;
     RealScalar s = sin(xi);
@@ -615,7 +615,7 @@ namespace std_fallback {
   EIGEN_DEVICE_FUNC inline Scalar log1p(const Scalar& x) {
     EIGEN_STATIC_ASSERT_NON_INTEGER(Scalar)
     typedef typename NumTraits<Scalar>::Real RealScalar;
-    EIGEN_USING_STD_MATH(log);
+    EIGEN_USING_STD(log);
     Scalar x1p = RealScalar(1) + x;
     Scalar log_1p = log(x1p);
     const bool is_small = numext::equal_strict(x1p, Scalar(1));
@@ -665,7 +665,7 @@ struct pow_impl
   typedef typename ScalarBinaryOpTraits<ScalarX,ScalarY,internal::scalar_pow_op<ScalarX,ScalarY> >::ReturnType result_type;
   static EIGEN_DEVICE_FUNC inline result_type run(const ScalarX& x, const ScalarY& y)
   {
-    EIGEN_USING_STD_MATH(pow);
+    EIGEN_USING_STD(pow);
     return pow(x, y);
   }
 };
@@ -972,7 +972,7 @@ template<typename T>
 EIGEN_DEVICE_FUNC
 EIGEN_ALWAYS_INLINE T mini(const T& x, const T& y)
 {
-  EIGEN_USING_STD_MATH(min)
+  EIGEN_USING_STD(min)
   return min EIGEN_NOT_A_MACRO (x,y);
 }
 
@@ -980,7 +980,7 @@ template<typename T>
 EIGEN_DEVICE_FUNC
 EIGEN_ALWAYS_INLINE T maxi(const T& x, const T& y)
 {
-  EIGEN_USING_STD_MATH(max)
+  EIGEN_USING_STD(max)
   return max EIGEN_NOT_A_MACRO (x,y);
 }
 #else
@@ -1289,7 +1289,7 @@ template<typename T>
 EIGEN_DEVICE_FUNC
 T (floor)(const T& x)
 {
-  EIGEN_USING_STD_MATH(floor)
+  EIGEN_USING_STD(floor)
   return floor(x);
 }
 
@@ -1309,7 +1309,7 @@ template<typename T>
 EIGEN_DEVICE_FUNC
 T (ceil)(const T& x)
 {
-  EIGEN_USING_STD_MATH(ceil);
+  EIGEN_USING_STD(ceil);
   return ceil(x);
 }
 
@@ -1354,7 +1354,7 @@ template<typename T>
 EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
 T sqrt(const T &x)
 {
-  EIGEN_USING_STD_MATH(sqrt);
+  EIGEN_USING_STD(sqrt);
   return sqrt(x);
 }
 
@@ -1365,7 +1365,7 @@ SYCL_SPECIALIZE_FLOATING_TYPES_UNARY(sqrt, sqrt)
 template<typename T>
 EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
 T log(const T &x) {
-  EIGEN_USING_STD_MATH(log);
+  EIGEN_USING_STD(log);
   return log(x);
 }
 
@@ -1386,7 +1386,7 @@ template<typename T>
 EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
 typename internal::enable_if<NumTraits<T>::IsSigned || NumTraits<T>::IsComplex,typename NumTraits<T>::Real>::type
 abs(const T &x) {
-  EIGEN_USING_STD_MATH(abs);
+  EIGEN_USING_STD(abs);
   return abs(x);
 }
 
@@ -1423,7 +1423,7 @@ double abs(const std::complex<double>& x) {
 template<typename T>
 EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
 T exp(const T &x) {
-  EIGEN_USING_STD_MATH(exp);
+  EIGEN_USING_STD(exp);
   return exp(x);
 }
 
@@ -1477,7 +1477,7 @@ double expm1(const double &x) { return ::expm1(x); }
 template<typename T>
 EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
 T cos(const T &x) {
-  EIGEN_USING_STD_MATH(cos);
+  EIGEN_USING_STD(cos);
   return cos(x);
 }
 
@@ -1496,7 +1496,7 @@ double cos(const double &x) { return ::cos(x); }
 template<typename T>
 EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
 T sin(const T &x) {
-  EIGEN_USING_STD_MATH(sin);
+  EIGEN_USING_STD(sin);
   return sin(x);
 }
 
@@ -1515,7 +1515,7 @@ double sin(const double &x) { return ::sin(x); }
 template<typename T>
 EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
 T tan(const T &x) {
-  EIGEN_USING_STD_MATH(tan);
+  EIGEN_USING_STD(tan);
   return tan(x);
 }
 
@@ -1534,7 +1534,7 @@ double tan(const double &x) { return ::tan(x); }
 template<typename T>
 EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
 T acos(const T &x) {
-  EIGEN_USING_STD_MATH(acos);
+  EIGEN_USING_STD(acos);
   return acos(x);
 }
 
@@ -1542,7 +1542,7 @@ T acos(const T &x) {
 template<typename T>
 EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
 T acosh(const T &x) {
-  EIGEN_USING_STD_MATH(acosh);
+  EIGEN_USING_STD(acosh);
   return acosh(x);
 }
 #endif
@@ -1563,7 +1563,7 @@ double acos(const double &x) { return ::acos(x); }
 template<typename T>
 EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
 T asin(const T &x) {
-  EIGEN_USING_STD_MATH(asin);
+  EIGEN_USING_STD(asin);
   return asin(x);
 }
 
@@ -1571,7 +1571,7 @@ T asin(const T &x) {
 template<typename T>
 EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
 T asinh(const T &x) {
-  EIGEN_USING_STD_MATH(asinh);
+  EIGEN_USING_STD(asinh);
   return asinh(x);
 }
 #endif
@@ -1592,7 +1592,7 @@ double asin(const double &x) { return ::asin(x); }
 template<typename T>
 EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
 T atan(const T &x) {
-  EIGEN_USING_STD_MATH(atan);
+  EIGEN_USING_STD(atan);
   return atan(x);
 }
 
@@ -1600,7 +1600,7 @@ T atan(const T &x) {
 template<typename T>
 EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
 T atanh(const T &x) {
-  EIGEN_USING_STD_MATH(atanh);
+  EIGEN_USING_STD(atanh);
   return atanh(x);
 }
 #endif
@@ -1622,7 +1622,7 @@ double atan(const double &x) { return ::atan(x); }
 template<typename T>
 EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
 T cosh(const T &x) {
-  EIGEN_USING_STD_MATH(cosh);
+  EIGEN_USING_STD(cosh);
   return cosh(x);
 }
 
@@ -1641,7 +1641,7 @@ double cosh(const double &x) { return ::cosh(x); }
 template<typename T>
 EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
 T sinh(const T &x) {
-  EIGEN_USING_STD_MATH(sinh);
+  EIGEN_USING_STD(sinh);
   return sinh(x);
 }
 
@@ -1660,7 +1660,7 @@ double sinh(const double &x) { return ::sinh(x); }
 template<typename T>
 EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
 T tanh(const T &x) {
-  EIGEN_USING_STD_MATH(tanh);
+  EIGEN_USING_STD(tanh);
   return tanh(x);
 }
 
@@ -1684,7 +1684,7 @@ double tanh(const double &x) { return ::tanh(x); }
 template <typename T>
 EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
 T fmod(const T& a, const T& b) {
-  EIGEN_USING_STD_MATH(fmod);
+  EIGEN_USING_STD(fmod);
   return fmod(a, b);
 }
 
diff --git a/Eigen/src/Core/MathFunctionsImpl.h b/Eigen/src/Core/MathFunctionsImpl.h
index 7af58fadb..8288ad834 100644
--- a/Eigen/src/Core/MathFunctionsImpl.h
+++ b/Eigen/src/Core/MathFunctionsImpl.h
@@ -79,7 +79,7 @@ template<typename RealScalar>
 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
 RealScalar positive_real_hypot(const RealScalar& x, const RealScalar& y)
 {
-  EIGEN_USING_STD_MATH(sqrt);
+  EIGEN_USING_STD(sqrt);
   RealScalar p, qp;
   p = numext::maxi(x,y);
   if(p==RealScalar(0)) return RealScalar(0);
@@ -94,7 +94,7 @@ struct hypot_impl
   static EIGEN_DEVICE_FUNC
   inline RealScalar run(const Scalar& x, const Scalar& y)
   {
-    EIGEN_USING_STD_MATH(abs);
+    EIGEN_USING_STD(abs);
     return positive_real_hypot<RealScalar>(abs(x), abs(y));
   }
 };
diff --git a/Eigen/src/Core/functors/UnaryFunctors.h b/Eigen/src/Core/functors/UnaryFunctors.h
index a9cbfd967..c7ed18c69 100644
--- a/Eigen/src/Core/functors/UnaryFunctors.h
+++ b/Eigen/src/Core/functors/UnaryFunctors.h
@@ -387,7 +387,7 @@ struct functor_traits<scalar_log1p_op<Scalar> > {
   */
 template<typename Scalar> struct scalar_log10_op {
   EIGEN_EMPTY_STRUCT_CTOR(scalar_log10_op)
-  EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const { EIGEN_USING_STD_MATH(log10) return log10(a); }
+  EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const { EIGEN_USING_STD(log10) return log10(a); }
   template <typename Packet>
   EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::plog10(a); }
 };
diff --git a/Eigen/src/Core/util/Macros.h b/Eigen/src/Core/util/Macros.h
index 243acc696..2d47c075c 100644
--- a/Eigen/src/Core/util/Macros.h
+++ b/Eigen/src/Core/util/Macros.h
@@ -1036,25 +1036,11 @@ namespace Eigen {
 // In host mode, and when device code is compiled with clang,
 // use the std versions.
 #if (defined(EIGEN_CUDA_ARCH) && defined(__NVCC__)) || defined(EIGEN_HIP_DEVICE_COMPILE)
-  #define EIGEN_USING_STD_MATH(FUNC) using ::FUNC;
-#else
-  #define EIGEN_USING_STD_MATH(FUNC) using std::FUNC;
-#endif
-
-
-// When compiling HIP device code with HIPCC, certain functions
-// from the stdlib need to be pulled in from the global namespace
-// (as opposed to from the std:: namespace). This is because HIPCC
-// does not natively support all the std:: routines in device code.
-// Instead it contains header files that declare the corresponding
-// routines in the global namespace such they can be used in device code.
-#if defined(EIGEN_HIP_DEVICE_COMPILE)
   #define EIGEN_USING_STD(FUNC) using ::FUNC;
 #else
   #define EIGEN_USING_STD(FUNC) using std::FUNC;
 #endif
 
-
 #if EIGEN_COMP_MSVC_STRICT && (EIGEN_COMP_MSVC < 1900 || EIGEN_COMP_NVCC)
   // for older MSVC versions, as well as 1900 && CUDA 8, using the base operator is sufficient (cf Bugs 1000, 1324)
   #define EIGEN_INHERIT_ASSIGNMENT_EQUAL_OPERATOR(Derived) \
diff --git a/Eigen/src/Eigenvalues/SelfAdjointEigenSolver.h b/Eigen/src/Eigenvalues/SelfAdjointEigenSolver.h
index 9bbce652f..73b7041e6 100644
--- a/Eigen/src/Eigenvalues/SelfAdjointEigenSolver.h
+++ b/Eigen/src/Eigenvalues/SelfAdjointEigenSolver.h
@@ -410,7 +410,7 @@ SelfAdjointEigenSolver<MatrixType>& SelfAdjointEigenSolver<MatrixType>
   
   const InputType &matrix(a_matrix.derived());
   
-  EIGEN_USING_STD_MATH(abs);
+  EIGEN_USING_STD(abs);
   eigen_assert(matrix.cols() == matrix.rows());
   eigen_assert((options&~(EigVecMask|GenEigMask))==0
           && (options&EigVecMask)!=EigVecMask
@@ -489,7 +489,7 @@ template<typename MatrixType, typename DiagType, typename SubDiagType>
 EIGEN_DEVICE_FUNC
 ComputationInfo computeFromTridiagonal_impl(DiagType& diag, SubDiagType& subdiag, const Index maxIterations, bool computeEigenvectors, MatrixType& eivec)
 {
-  EIGEN_USING_STD_MATH(abs);
+  EIGEN_USING_STD(abs);
 
   ComputationInfo info;
   typedef typename MatrixType::Scalar Scalar;
@@ -574,10 +574,10 @@ template<typename SolverType> struct direct_selfadjoint_eigenvalues<SolverType,3
   EIGEN_DEVICE_FUNC
   static inline void computeRoots(const MatrixType& m, VectorType& roots)
   {
-    EIGEN_USING_STD_MATH(sqrt)
-    EIGEN_USING_STD_MATH(atan2)
-    EIGEN_USING_STD_MATH(cos)
-    EIGEN_USING_STD_MATH(sin)
+    EIGEN_USING_STD(sqrt)
+    EIGEN_USING_STD(atan2)
+    EIGEN_USING_STD(cos)
+    EIGEN_USING_STD(sin)
     const Scalar s_inv3 = Scalar(1)/Scalar(3);
     const Scalar s_sqrt3 = sqrt(Scalar(3));
 
@@ -613,8 +613,8 @@ template<typename SolverType> struct direct_selfadjoint_eigenvalues<SolverType,3
   EIGEN_DEVICE_FUNC
   static inline bool extract_kernel(MatrixType& mat, Ref<VectorType> res, Ref<VectorType> representative)
   {
-    EIGEN_USING_STD_MATH(abs);
-    EIGEN_USING_STD_MATH(sqrt);
+    EIGEN_USING_STD(abs);
+    EIGEN_USING_STD(sqrt);
     Index i0;
     // Find non-zero column i0 (by construction, there must exist a non zero coefficient on the diagonal):
     mat.diagonal().cwiseAbs().maxCoeff(&i0);
@@ -728,7 +728,7 @@ struct direct_selfadjoint_eigenvalues<SolverType,2,false>
   EIGEN_DEVICE_FUNC
   static inline void computeRoots(const MatrixType& m, VectorType& roots)
   {
-    EIGEN_USING_STD_MATH(sqrt);
+    EIGEN_USING_STD(sqrt);
     const Scalar t0 = Scalar(0.5) * sqrt( numext::abs2(m(0,0)-m(1,1)) + Scalar(4)*numext::abs2(m(1,0)));
     const Scalar t1 = Scalar(0.5) * (m(0,0) + m(1,1));
     roots(0) = t1 - t0;
@@ -738,8 +738,8 @@ struct direct_selfadjoint_eigenvalues<SolverType,2,false>
   EIGEN_DEVICE_FUNC
   static inline void run(SolverType& solver, const MatrixType& mat, int options)
   {
-    EIGEN_USING_STD_MATH(sqrt);
-    EIGEN_USING_STD_MATH(abs);
+    EIGEN_USING_STD(sqrt);
+    EIGEN_USING_STD(abs);
     
     eigen_assert(mat.cols() == 2 && mat.cols() == mat.rows());
     eigen_assert((options&~(EigVecMask|GenEigMask))==0
@@ -816,7 +816,7 @@ template<int StorageOrder,typename RealScalar, typename Scalar, typename Index>
 EIGEN_DEVICE_FUNC
 static void tridiagonal_qr_step(RealScalar* diag, RealScalar* subdiag, Index start, Index end, Scalar* matrixQ, Index n)
 {
-  EIGEN_USING_STD_MATH(abs);
+  EIGEN_USING_STD(abs);
   RealScalar td = (diag[end-1] - diag[end])*RealScalar(0.5);
   RealScalar e = subdiag[end-1];
   // Note that thanks to scaling, e^2 or td^2 cannot overflow, however they can still
diff --git a/Eigen/src/Geometry/AlignedBox.h b/Eigen/src/Geometry/AlignedBox.h
index 02f21e3bc..55a9d0ae1 100644
--- a/Eigen/src/Geometry/AlignedBox.h
+++ b/Eigen/src/Geometry/AlignedBox.h
@@ -310,14 +310,14 @@ EIGEN_MAKE_ALIGNED_OPERATOR_NEW_IF_VECTORIZABLE_FIXED_SIZE(_Scalar,_AmbientDim)
     */
   template<typename Derived>
   EIGEN_DEVICE_FUNC inline NonInteger exteriorDistance(const MatrixBase<Derived>& p) const
-  { EIGEN_USING_STD_MATH(sqrt) return sqrt(NonInteger(squaredExteriorDistance(p))); }
+  { EIGEN_USING_STD(sqrt) return sqrt(NonInteger(squaredExteriorDistance(p))); }
 
   /** \returns the distance between the boxes \a b and \c *this,
     * and zero if the boxes intersect.
     * \sa squaredExteriorDistance(const AlignedBox&), exteriorDistance(const MatrixBase&)
     */
   EIGEN_DEVICE_FUNC inline NonInteger exteriorDistance(const AlignedBox& b) const
-  { EIGEN_USING_STD_MATH(sqrt) return sqrt(NonInteger(squaredExteriorDistance(b))); }
+  { EIGEN_USING_STD(sqrt) return sqrt(NonInteger(squaredExteriorDistance(b))); }
 
   /**
    * Specialization of transform for pure translation.
diff --git a/Eigen/src/Geometry/AngleAxis.h b/Eigen/src/Geometry/AngleAxis.h
index 83ee1be46..78328b6b5 100644
--- a/Eigen/src/Geometry/AngleAxis.h
+++ b/Eigen/src/Geometry/AngleAxis.h
@@ -169,8 +169,8 @@ template<typename Scalar>
 template<typename QuatDerived>
 EIGEN_DEVICE_FUNC AngleAxis<Scalar>& AngleAxis<Scalar>::operator=(const QuaternionBase<QuatDerived>& q)
 {
-  EIGEN_USING_STD_MATH(atan2)
-  EIGEN_USING_STD_MATH(abs)
+  EIGEN_USING_STD(atan2)
+  EIGEN_USING_STD(abs)
   Scalar n = q.vec().norm();
   if(n<NumTraits<Scalar>::epsilon())
     n = q.vec().stableNorm();
@@ -217,8 +217,8 @@ template<typename Scalar>
 typename AngleAxis<Scalar>::Matrix3
 EIGEN_DEVICE_FUNC AngleAxis<Scalar>::toRotationMatrix(void) const
 {
-  EIGEN_USING_STD_MATH(sin)
-  EIGEN_USING_STD_MATH(cos)
+  EIGEN_USING_STD(sin)
+  EIGEN_USING_STD(cos)
   Matrix3 res;
   Vector3 sin_axis  = sin(m_angle) * m_axis;
   Scalar c = cos(m_angle);
diff --git a/Eigen/src/Geometry/EulerAngles.h b/Eigen/src/Geometry/EulerAngles.h
index c633268af..19b734ca7 100644
--- a/Eigen/src/Geometry/EulerAngles.h
+++ b/Eigen/src/Geometry/EulerAngles.h
@@ -36,9 +36,9 @@ template<typename Derived>
 EIGEN_DEVICE_FUNC inline Matrix<typename MatrixBase<Derived>::Scalar,3,1>
 MatrixBase<Derived>::eulerAngles(Index a0, Index a1, Index a2) const
 {
-  EIGEN_USING_STD_MATH(atan2)
-  EIGEN_USING_STD_MATH(sin)
-  EIGEN_USING_STD_MATH(cos)
+  EIGEN_USING_STD(atan2)
+  EIGEN_USING_STD(sin)
+  EIGEN_USING_STD(cos)
   /* Implemented from Graphics Gems IV */
   EIGEN_STATIC_ASSERT_MATRIX_SPECIFIC_SIZE(Derived,3,3)
 
diff --git a/Eigen/src/Geometry/ParametrizedLine.h b/Eigen/src/Geometry/ParametrizedLine.h
index 3929ca87f..584f50087 100644
--- a/Eigen/src/Geometry/ParametrizedLine.h
+++ b/Eigen/src/Geometry/ParametrizedLine.h
@@ -87,7 +87,7 @@ public:
   /** \returns the distance of a point \a p to its projection onto the line \c *this.
     * \sa squaredDistance()
     */
-  EIGEN_DEVICE_FUNC RealScalar distance(const VectorType& p) const { EIGEN_USING_STD_MATH(sqrt) return sqrt(squaredDistance(p)); }
+  EIGEN_DEVICE_FUNC RealScalar distance(const VectorType& p) const { EIGEN_USING_STD(sqrt) return sqrt(squaredDistance(p)); }
 
   /** \returns the projection of a point \a p onto the line \c *this. */
   EIGEN_DEVICE_FUNC VectorType projection(const VectorType& p) const
diff --git a/Eigen/src/Geometry/Quaternion.h b/Eigen/src/Geometry/Quaternion.h
index 19835523f..3259e592d 100644
--- a/Eigen/src/Geometry/Quaternion.h
+++ b/Eigen/src/Geometry/Quaternion.h
@@ -560,8 +560,8 @@ EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Derived& QuaternionBase<Derived>::operator
 template<class Derived>
 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Derived& QuaternionBase<Derived>::operator=(const AngleAxisType& aa)
 {
-  EIGEN_USING_STD_MATH(cos)
-  EIGEN_USING_STD_MATH(sin)
+  EIGEN_USING_STD(cos)
+  EIGEN_USING_STD(sin)
   Scalar ha = Scalar(0.5)*aa.angle(); // Scalar(0.5) to suppress precision loss warnings
   this->w() = cos(ha);
   this->vec() = sin(ha) * aa.axis();
@@ -637,7 +637,7 @@ template<class Derived>
 template<typename Derived1, typename Derived2>
 EIGEN_DEVICE_FUNC inline Derived& QuaternionBase<Derived>::setFromTwoVectors(const MatrixBase<Derived1>& a, const MatrixBase<Derived2>& b)
 {
-  EIGEN_USING_STD_MATH(sqrt)
+  EIGEN_USING_STD(sqrt)
   Vector3 v0 = a.normalized();
   Vector3 v1 = b.normalized();
   Scalar c = v1.dot(v0);
@@ -678,9 +678,9 @@ EIGEN_DEVICE_FUNC inline Derived& QuaternionBase<Derived>::setFromTwoVectors(con
 template<typename Scalar, int Options>
 EIGEN_DEVICE_FUNC Quaternion<Scalar,Options> Quaternion<Scalar,Options>::UnitRandom()
 {
-  EIGEN_USING_STD_MATH(sqrt)
-  EIGEN_USING_STD_MATH(sin)
-  EIGEN_USING_STD_MATH(cos)
+  EIGEN_USING_STD(sqrt)
+  EIGEN_USING_STD(sin)
+  EIGEN_USING_STD(cos)
   const Scalar u1 = internal::random<Scalar>(0, 1),
                u2 = internal::random<Scalar>(0, 2*EIGEN_PI),
                u3 = internal::random<Scalar>(0, 2*EIGEN_PI);
@@ -763,7 +763,7 @@ template <class OtherDerived>
 EIGEN_DEVICE_FUNC inline typename internal::traits<Derived>::Scalar
 QuaternionBase<Derived>::angularDistance(const QuaternionBase<OtherDerived>& other) const
 {
-  EIGEN_USING_STD_MATH(atan2)
+  EIGEN_USING_STD(atan2)
   Quaternion<Scalar> d = (*this) * other.conjugate();
   return Scalar(2) * atan2( d.vec().norm(), numext::abs(d.w()) );
 }
@@ -781,8 +781,8 @@ template <class OtherDerived>
 EIGEN_DEVICE_FUNC Quaternion<typename internal::traits<Derived>::Scalar>
 QuaternionBase<Derived>::slerp(const Scalar& t, const QuaternionBase<OtherDerived>& other) const
 {
-  EIGEN_USING_STD_MATH(acos)
-  EIGEN_USING_STD_MATH(sin)
+  EIGEN_USING_STD(acos)
+  EIGEN_USING_STD(sin)
   const Scalar one = Scalar(1) - NumTraits<Scalar>::epsilon();
   Scalar d = this->dot(other);
   Scalar absD = numext::abs(d);
@@ -819,7 +819,7 @@ struct quaternionbase_assign_impl<Other,3,3>
   template<class Derived> EIGEN_DEVICE_FUNC static inline void run(QuaternionBase<Derived>& q, const Other& a_mat)
   {
     const typename internal::nested_eval<Other,2>::type mat(a_mat);
-    EIGEN_USING_STD_MATH(sqrt)
+    EIGEN_USING_STD(sqrt)
     // This algorithm comes from  "Quaternion Calculus and Fast Animation",
     // Ken Shoemake, 1987 SIGGRAPH course notes
     Scalar t = mat.trace();
diff --git a/Eigen/src/Geometry/Rotation2D.h b/Eigen/src/Geometry/Rotation2D.h
index 884b7d0ee..d0bd57569 100644
--- a/Eigen/src/Geometry/Rotation2D.h
+++ b/Eigen/src/Geometry/Rotation2D.h
@@ -175,7 +175,7 @@ template<typename Scalar>
 template<typename Derived>
 EIGEN_DEVICE_FUNC Rotation2D<Scalar>& Rotation2D<Scalar>::fromRotationMatrix(const MatrixBase<Derived>& mat)
 {
-  EIGEN_USING_STD_MATH(atan2)
+  EIGEN_USING_STD(atan2)
   EIGEN_STATIC_ASSERT(Derived::RowsAtCompileTime==2 && Derived::ColsAtCompileTime==2,YOU_MADE_A_PROGRAMMING_MISTAKE)
   m_angle = atan2(mat.coeff(1,0), mat.coeff(0,0));
   return *this;
@@ -187,8 +187,8 @@ template<typename Scalar>
 typename Rotation2D<Scalar>::Matrix2
 EIGEN_DEVICE_FUNC Rotation2D<Scalar>::toRotationMatrix(void) const
 {
-  EIGEN_USING_STD_MATH(sin)
-  EIGEN_USING_STD_MATH(cos)
+  EIGEN_USING_STD(sin)
+  EIGEN_USING_STD(cos)
   Scalar sinA = sin(m_angle);
   Scalar cosA = cos(m_angle);
   return (Matrix2() << cosA, -sinA, sinA, cosA).finished();
-- 
cgit v1.2.3