diff options
Diffstat (limited to 'Source/JavaScriptCore')
| -rw-r--r-- | Source/JavaScriptCore/ChangeLog | 20 | ||||
| -rw-r--r-- | Source/JavaScriptCore/runtime/MathObject.cpp | 16 |
2 files changed, 36 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/ChangeLog b/Source/JavaScriptCore/ChangeLog index e9ddd3906..4e661d971 100644 --- a/Source/JavaScriptCore/ChangeLog +++ b/Source/JavaScriptCore/ChangeLog @@ -1,3 +1,23 @@ +2012-12-17 Jonathan Liu <net147@gmail.com> + + Fix Math.pow implementation with MinGW-w64 + https://bugs.webkit.org/show_bug.cgi?id=105087 + + Reviewed by Simon Hausmann. + + The MinGW-w64 runtime has different behaviour for pow() + compared to other C runtimes. This results in the following + test262 tests failing with the latest MinGW-w64 runtime: + - S15.8.2.13_A14 + - S15.8.2.13_A16 + - S15.8.2.13_A20 + - S15.8.2.13_A22 + + Handle the special cases that are different with MinGW-w64. + + * runtime/MathObject.cpp: + (JSC::mathPow): + 2012-12-07 Jonathan Liu <net147@gmail.com> Add missing forward declaration for JSC::ArrayAllocationProfile diff --git a/Source/JavaScriptCore/runtime/MathObject.cpp b/Source/JavaScriptCore/runtime/MathObject.cpp index 7634487ad..f939b8dd4 100644 --- a/Source/JavaScriptCore/runtime/MathObject.cpp +++ b/Source/JavaScriptCore/runtime/MathObject.cpp @@ -232,6 +232,22 @@ static ALWAYS_INLINE double mathPow(double x, double y) ALWAYS_INLINE double mathPow(double x, double y) { +#if COMPILER(MINGW64) + // MinGW-w64 has a custom implementation for pow. + // This handles certain special cases that are different. + if ((x == 0.0 || isinf(x)) && isfinite(y)) { + double f; + if (modf(y, &f) != 0.0) + return ((x == 0.0) ^ (y > 0.0)) ? std::numeric_limits<double>::infinity() : 0.0; + } + + if (x == 2.0) { + int yInt = static_cast<int>(y); + if (y == yInt) + return ldexp(1.0, yInt); + } +#endif + return pow(x, y); } |