[builtins] Introduce proper base::ieee754::log.

test/cctest/compiler/value-helper.h

 // Copyright 2014 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.
 
 #ifndef V8_CCTEST_COMPILER_VALUE_HELPER_H_
 #define V8_CCTEST_COMPILER_VALUE_HELPER_H_
 
 #include <stdint.h>
 
 #include "src/compiler/common-operator.h"
@@ skipping 93 matching lines @@
         -62.0f,
         -15.0f,
         -7.0f,
         -1.0f,
         -0.0256635f,
         -4.60374e-07f,
         -3.63759e-10f,
         -4.30175e-14f,
         -5.27385e-15f,
         -1.48084e-15f,
+        -2.220446049250313e-16f,
         -1.05755e-19f,
         -3.2995e-21f,
         -1.67354e-23f,
         -1.11885e-23f,
         -1.78506e-30f,
         -5.07594e-31f,
         -3.65799e-31f,
         -1.43718e-34f,
         -1.27126e-38f,
         -0.0f,
@@ skipping 46 matching lines @@
         std::numeric_limits<float>::infinity(),
         nan,
         -nan,
     };
     return std::vector<float>(&kValues[0], &kValues[arraysize(kValues)]);
   }
 
   static std::vector<double> float64_vector() {
     static const double nan = std::numeric_limits<double>::quiet_NaN();
     static const double values[] = {-2e66,
+                                    -2.220446049250313e-16,
                                     -9223373136366403584.0,
                                     -9223372036854775808.0,  // INT64_MIN
                                     -2147483649.5,
                                     -2147483648.25,
                                     -2147483648.0,
                                     -2147483647.875,
                                     -2147483647.125,
                                     -2147483647.0,
                                     -999.75,
                                     -2e66,
@@ skipping 149 matching lines @@
   do {                            \
     volatile double tmp = lhs;    \
     CheckDoubleEq(tmp, rhs);      \
   } while (0)
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CCTEST_COMPILER_VALUE_HELPER_H_