Line data    Source code

       1             : // Copyright 2012 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #include "src/codegen.h"
       6             : 
       7             : #include <cmath>
       8             : #include <memory>
       9             : 
      10             : #include "src/flags.h"
      11             : 
      12             : namespace v8 {
      13             : namespace internal {
      14             : 
      15             : #define UNARY_MATH_FUNCTION(name, generator)                             \
      16             :   static UnaryMathFunctionWithIsolate fast_##name##_function = nullptr;  \
      17             :   double std_##name(double x, Isolate* isolate) { return std::name(x); } \
      18             :   void init_fast_##name##_function(Isolate* isolate) {                   \
      19             :     if (FLAG_fast_math) fast_##name##_function = generator(isolate);     \
      20             :     if (!fast_##name##_function) fast_##name##_function = std_##name;    \
      21             :   }                                                                      \
      22             :   void lazily_initialize_fast_##name(Isolate* isolate) {                 \
      23             :     if (!fast_##name##_function) init_fast_##name##_function(isolate);   \
      24             :   }                                                                      \
      25             :   double fast_##name(double x, Isolate* isolate) {                       \
      26             :     return (*fast_##name##_function)(x, isolate);                        \
      27             :   }
      28             : 
      29           0 : UNARY_MATH_FUNCTION(sqrt, CreateSqrtFunction)
      30             : 
      31             : #undef UNARY_MATH_FUNCTION
      32             : 
      33             : }  // namespace internal
      34             : }  // namespace v8