- http://bugs.webkit.org/show_bug.cgi?id=15617
          improve speed of integer conversions

        Makes SunSpider 6% faster.

        * kjs/JSImmediate.h: Added toInt32 and toUInt32, with separate versions for
        32-bit and 64-bit.
        * kjs/value.h:
        (KJS::JSValue::getUInt32): Call JSImmediate::toUInt32.

        * kjs/internal.h: Added getInt32.
        * kjs/internal.cpp:
        (KJS::NumberImp::getInt32): Added.
        (KJS::NumberImp::getUInt32): Replaced with more-optimal implementation
        stolen from JSValue.

        * kjs/value.h:
        (KJS::jsNumber): Marked ALWAYS_INLINE, because this wasn't getting
        inlined.
        (KJS::JSValue::getInt32): Added.
        (KJS::JSValue::getUInt32): Changed to call the new JSImmediate::toUInt32
        to avoid converting from float to double.
        (KJS::JSValue::toInt32): Made inline, separated out the slow case.
        (KJS::JSValue::toUInt32): Ditto.
        * kjs/value.cpp:
        (KJS::JSCell::getInt32): Added.
        (KJS::JSValue::toInt32SlowCase): Renamed from toInt32. Changed to use the
        new getInt32. Added a faster case for in-range numbers.
        (KJS::JSValue::toUInt32SlowCase): Ditto.
        (KJS::JSValue::toUInt16): Added a faster case for in-range numbers.

        * JavaScriptCore.exp: Updated for changes.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@26892 268f45cc-cd09-0410-ab3c-d52691b4dbfc