From f23dc5b971d1c11bc0fcb7068788a30e4bd7cbf1 Mon Sep 17 00:00:00 2001
From: Rasmus Munk Larsen <rmlarsen@google.com>
Date: Thu, 3 Dec 2020 14:32:45 -0800
Subject: Revert "Add log2() operator to Eigen"

This reverts commit 4d91519a9be061da5d300079fca17dd0b9328050.
---
 test/array_cwise.cpp | 4 ----
 test/packetmath.cpp  | 8 --------
 2 files changed, 12 deletions(-)

(limited to 'test')

diff --git a/test/array_cwise.cpp b/test/array_cwise.cpp
index 6910f0e1f..48c0935a4 100644
--- a/test/array_cwise.cpp
+++ b/test/array_cwise.cpp
@@ -319,7 +319,6 @@ template<typename ArrayType> void array_real(const ArrayType& m)
   VERIFY_IS_APPROX(m3.log(), log(m3));
   VERIFY_IS_APPROX(m3.log1p(), log1p(m3));
   VERIFY_IS_APPROX(m3.log10(), log10(m3));
-  VERIFY_IS_APPROX(m3.log2(), log2(m3));
 
 
   VERIFY((!(m1>m2) == (m1<=m2)).all());
@@ -373,7 +372,6 @@ template<typename ArrayType> void array_real(const ArrayType& m)
   VERIFY_IS_APPROX(pow(m3,RealScalar(-0.5)), m3.rsqrt());
 
   VERIFY_IS_APPROX(log10(m3), log(m3)/log(10));
-  VERIFY_IS_APPROX(log2(m3), log(m3)/log(2));
 
   // scalar by array division
   const RealScalar tiny = sqrt(std::numeric_limits<RealScalar>::epsilon());
@@ -425,7 +423,6 @@ template<typename ArrayType> void array_complex(const ArrayType& m)
   VERIFY_IS_APPROX(m1.inverse(), inverse(m1));
   VERIFY_IS_APPROX(m1.log(), log(m1));
   VERIFY_IS_APPROX(m1.log10(), log10(m1));
-  VERIFY_IS_APPROX(m1.log2(), log2(m1));
   VERIFY_IS_APPROX(m1.abs(), abs(m1));
   VERIFY_IS_APPROX(m1.abs2(), abs2(m1));
   VERIFY_IS_APPROX(m1.sqrt(), sqrt(m1));
@@ -481,7 +478,6 @@ template<typename ArrayType> void array_complex(const ArrayType& m)
   VERIFY_IS_APPROX(abs(m1), sqrt(square(m1.real())+square(m1.imag())));
   VERIFY_IS_APPROX(abs(m1), sqrt(abs2(m1)));
   VERIFY_IS_APPROX(log10(m1), log(m1)/log(10));
-  VERIFY_IS_APPROX(log2(m1), log(m1)/log(2));
 
   VERIFY_IS_APPROX( m1.sign(), -(-m1).sign() );
   VERIFY_IS_APPROX( m1.sign() * m1.abs(), m1);
diff --git a/test/packetmath.cpp b/test/packetmath.cpp
index d995e8b71..ae0ead820 100644
--- a/test/packetmath.cpp
+++ b/test/packetmath.cpp
@@ -488,13 +488,6 @@ void packetmath() {
   packetmath_minus_zero_add<Scalar, Packet>();
 }
 
-// Notice that this definition works for complex types as well.
-// c++11 has std::log2 for real, but not for complex types.
-template <typename Scalar>
-Scalar log2(Scalar x) {
-  return Scalar(M_LOG2E) * std::log(x);
-}
-
 template <typename Scalar, typename Packet>
 void packetmath_real() {
   typedef internal::packet_traits<Scalar> PacketTraits;
@@ -513,7 +506,6 @@ void packetmath_real() {
   if (internal::random<float>(0, 1) < 0.1f) data1[internal::random<int>(0, PacketSize)] = Scalar(0);
 
   CHECK_CWISE1_IF(PacketTraits::HasLog, std::log, internal::plog);
-  CHECK_CWISE1_IF(PacketTraits::HasLog, log2, internal::plog2);
   CHECK_CWISE1_IF(PacketTraits::HasRsqrt, 1 / std::sqrt, internal::prsqrt);
 
   for (int i = 0; i < size; ++i) {
-- 
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