Revert of [builtins] Introduce proper Float64Exp operator.

test/unittests/base/ieee754-unittest.cc

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <limits>
 
 #include "src/base/ieee754.h"
 #include "src/base/macros.h"
 #include "testing/gmock-support.h"
 #include "testing/gtest-support.h"
@@ skipping 36 matching lines @@
                    atan2(std::numeric_limits<double>::infinity(),
                          -std::numeric_limits<double>::infinity()));
   EXPECT_DOUBLE_EQ(-0.7853981633974483,
                    atan2(-std::numeric_limits<double>::infinity(),
                          std::numeric_limits<double>::infinity()));
   EXPECT_DOUBLE_EQ(-2.356194490192345,
                    atan2(-std::numeric_limits<double>::infinity(),
                          -std::numeric_limits<double>::infinity()));
 }
 
-TEST(Ieee754, Exp) {
-  EXPECT_THAT(exp(std::numeric_limits<double>::quiet_NaN()), IsNaN());
-  EXPECT_THAT(exp(std::numeric_limits<double>::signaling_NaN()), IsNaN());
-  EXPECT_EQ(0.0, exp(-std::numeric_limits<double>::infinity()));
-  EXPECT_EQ(std::numeric_limits<double>::infinity(),
-            exp(std::numeric_limits<double>::infinity()));
-  EXPECT_EQ(3.307553003638408e-308, exp(-708.0));
-  EXPECT_EQ(2.2250738585072626e-308, exp(-708.39641853226408));
-  EXPECT_EQ(0.36787944117144233, exp(-1.0));
-  EXPECT_EQ(1.0, exp(-0.0));
-  EXPECT_EQ(1.0, exp(0.0));
-  EXPECT_EQ(2.7182818284590455, exp(1.0));
-  EXPECT_EQ(2.6881171418161356e+43, exp(100.0));
-  EXPECT_EQ(8.218407461554972e+307, exp(709.0));
-  EXPECT_EQ(std::numeric_limits<double>::infinity(), exp(710.0));
-}
-
 TEST(Ieee754, Log) {
   EXPECT_THAT(log(std::numeric_limits<double>::quiet_NaN()), IsNaN());
   EXPECT_THAT(log(std::numeric_limits<double>::signaling_NaN()), IsNaN());
   EXPECT_THAT(log(-std::numeric_limits<double>::infinity()), IsNaN());
   EXPECT_THAT(log(-1.0), IsNaN());
   EXPECT_EQ(-std::numeric_limits<double>::infinity(), log(-0.0));
   EXPECT_EQ(-std::numeric_limits<double>::infinity(), log(0.0));
   EXPECT_EQ(0.0, log(1.0));
   EXPECT_EQ(std::numeric_limits<double>::infinity(),
             log(std::numeric_limits<double>::infinity()));
@@ skipping 47 matching lines @@
   EXPECT_EQ(3.0, log10(1000.0));
   EXPECT_EQ(14.0, log10(100000000000000));  // log10(10 ^ 14)
   EXPECT_EQ(3.7389561269540406, log10(5482.2158));
   EXPECT_EQ(14.661551142893833, log10(458723662312872.125782332587));
   EXPECT_EQ(-0.9083828622192334, log10(0.12348583358871));
 }
 
 }  // namespace ieee754
 }  // namespace base
 }  // namespace v8