// 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. #ifndef V8_BASE_IEEE754_H_ #define V8_BASE_IEEE754_H_ #include "src/base/base-export.h" #if defined(V8_USE_LIBM_TRIG_FUNCTIONS) #include "third_party/glibc/src/sysdeps/ieee754/dbl-64/trig.h" // nogncheck #endif namespace v8 { namespace base { namespace ieee754 { // Returns the arc cosine of |x|; that is the value whose cosine is |x|. V8_BASE_EXPORT double acos(double x); // Returns the inverse hyperbolic cosine of |x|; that is the value whose // hyperbolic cosine is |x|. V8_BASE_EXPORT double acosh(double x); // Returns the arc sine of |x|; that is the value whose sine is |x|. V8_BASE_EXPORT double asin(double x); // Returns the inverse hyperbolic sine of |x|; that is the value whose // hyperbolic sine is |x|. V8_BASE_EXPORT double asinh(double x); // Returns the principal value of the arc tangent of |x|; that is the value // whose tangent is |x|. V8_BASE_EXPORT double atan(double x); // Returns the principal value of the arc tangent of |y/x|, using the signs of // the two arguments to determine the quadrant of the result. V8_BASE_EXPORT double atan2(double y, double x); #if defined(V8_USE_LIBM_TRIG_FUNCTIONS) // To ensure there aren't problems with libm's sin/cos, both implementations // are shipped. The plan is to transition to libm once we ensure there are no // compatibility or performance issues. V8_BASE_EXPORT double fdlibm_sin(double x); V8_BASE_EXPORT double fdlibm_cos(double x); #if !defined(BUILDING_V8_BASE_SHARED) && !defined(USING_V8_BASE_SHARED) inline double libm_sin(double x) { return glibc_sin(x); } inline double libm_cos(double x) { return glibc_cos(x); } #else V8_BASE_EXPORT double libm_sin(double x); V8_BASE_EXPORT double libm_cos(double x); #endif #else V8_BASE_EXPORT double cos(double x); V8_BASE_EXPORT double sin(double x); #endif // Returns the base-e exponential of |x|. V8_BASE_EXPORT double exp(double x); V8_BASE_EXPORT double atanh(double x); // Returns the natural logarithm of |x|. V8_BASE_EXPORT double log(double x); // Returns a value equivalent to |log(1+x)|, but computed in a way that is // accurate even if the value of |x| is near zero. V8_BASE_EXPORT double log1p(double x); // Returns the base 2 logarithm of |x|. V8_BASE_EXPORT double log2(double x); // Returns the base 10 logarithm of |x|. V8_BASE_EXPORT double log10(double x); // Returns the cube root of |x|. V8_BASE_EXPORT double cbrt(double x); // Returns exp(x)-1, the exponential of |x| minus 1. V8_BASE_EXPORT double expm1(double x); // Returns |x| to the power of |y|. // The result of base ** exponent when base is 1 or -1 and exponent is // +Infinity or -Infinity differs from IEEE 754-2008. The first edition // of ECMAScript specified a result of NaN for this operation, whereas // later versions of IEEE 754-2008 specified 1. The historical ECMAScript // behaviour is preserved for compatibility reasons. V8_BASE_EXPORT double pow(double x, double y); // Returns the tangent of |x|, where |x| is given in radians. V8_BASE_EXPORT double tan(double x); // Returns the hyperbolic cosine of |x|, where |x| is given radians. V8_BASE_EXPORT double cosh(double x); // Returns the hyperbolic sine of |x|, where |x| is given radians. V8_BASE_EXPORT double sinh(double x); // Returns the hyperbolic tangent of |x|, where |x| is given radians. V8_BASE_EXPORT double tanh(double x); } // namespace ieee754 } // namespace base } // namespace v8 #endif // V8_BASE_IEEE754_H_