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Diffstat (limited to 'JavaScriptCore/wtf/MathExtras.h')
| -rw-r--r-- | JavaScriptCore/wtf/MathExtras.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/JavaScriptCore/wtf/MathExtras.h b/JavaScriptCore/wtf/MathExtras.h index 8a8741c..095549e 100644 --- a/JavaScriptCore/wtf/MathExtras.h +++ b/JavaScriptCore/wtf/MathExtras.h @@ -145,6 +145,13 @@ inline float nextafterf(float x, float y) { return x > y ? x - FLT_EPSILON : x + inline double copysign(double x, double y) { return _copysign(x, y); } inline int isfinite(double x) { return _finite(x); } +// MSVC's math.h does not currently supply log2. +inline double log2(double num) +{ + // This constant is roughly M_LN2, which is not provided by default on Windows. + return log(num) / 0.693147180559945309417232121458176568; +} + // Work around a bug in Win, where atan2(+-infinity, +-infinity) yields NaN instead of specific values. inline double wtf_atan2(double x, double y) { |