[MinGW-w64] Centralize workaround for pow() implementation

https://bugs.webkit.org/show_bug.cgi?id=105925

Reviewed by Sam Weinig.

As suggested by Sam, move the MinGW-w64 workaround into MathExtras.h
away from the JSC usage.

Source/JavaScriptCore:

* runtime/MathObject.cpp:
(JSC::mathPow):

Source/WTF:

* wtf/MathExtras.h:
(wtf_pow):

Change-Id: I49b2365baae6fdd9700667d1ef53c78bd70f6de3
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@138705 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>

1 files changed, 0 insertions, 16 deletions

diff --git a/Source/JavaScriptCore/runtime/MathObject.cpp b/Source/JavaScriptCore/runtime/MathObject.cpp
index f939b8dd4..7634487ad 100644
--- a/Source/JavaScriptCore/runtime/MathObject.cpp
+++ b/Source/JavaScriptCore/runtime/MathObject.cpp
@@ -232,22 +232,6 @@ 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);
 }