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1 // Copyright 2016 the V8 project authors. All rights reserved. | 1 // Copyright 2016 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_BASE_IEEE754_H_ | 5 #ifndef V8_BASE_IEEE754_H_ |
6 #define V8_BASE_IEEE754_H_ | 6 #define V8_BASE_IEEE754_H_ |
7 | 7 |
8 namespace v8 { | 8 namespace v8 { |
9 namespace base { | 9 namespace base { |
10 namespace ieee754 { | 10 namespace ieee754 { |
11 | 11 |
12 // Returns the principal value of the arc tangent of |x|; that is the value | 12 // Returns the principal value of the arc tangent of |x|; that is the value |
13 // whose tangent is |x|. | 13 // whose tangent is |x|. |
14 double atan(double x); | 14 double atan(double x); |
15 | 15 |
16 // Returns the principal value of the arc tangent of |y/x|, using the signs of | 16 // Returns the principal value of the arc tangent of |y/x|, using the signs of |
17 // the two arguments to determine the quadrant of the result. | 17 // the two arguments to determine the quadrant of the result. |
18 double atan2(double y, double x); | 18 double atan2(double y, double x); |
19 | 19 |
| 20 // Returns the base-e exponential of |x|. |
| 21 double exp(double x); |
| 22 |
20 // Returns the natural logarithm of |x|. | 23 // Returns the natural logarithm of |x|. |
21 double log(double x); | 24 double log(double x); |
22 | 25 |
23 // Returns a value equivalent to |log(1+x)|, but computed in a way that is | 26 // Returns a value equivalent to |log(1+x)|, but computed in a way that is |
24 // accurate even if the value of |x| is near zero. | 27 // accurate even if the value of |x| is near zero. |
25 double log1p(double x); | 28 double log1p(double x); |
26 | 29 |
27 // Return the base 2 logarithm of |x|. | 30 // Return the base 2 logarithm of |x|. |
28 double log2(double x); | 31 double log2(double x); |
29 | 32 |
30 // Return the base 10 logarithm of |x|. | 33 // Return the base 10 logarithm of |x|. |
31 double log10(double x); | 34 double log10(double x); |
32 | 35 |
33 } // namespace ieee754 | 36 } // namespace ieee754 |
34 } // namespace base | 37 } // namespace base |
35 } // namespace v8 | 38 } // namespace v8 |
36 | 39 |
37 #endif // V8_BASE_IEEE754_H_ | 40 #endif // V8_BASE_IEEE754_H_ |
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