Changeset 58317 in webkit for trunk/JavaScriptCore/runtime/SmallStrings.h

Timestamp:

Apr 27, 2010, 11:17:35 AM (15 years ago)

Author:

[email protected]

Message:

2010-04-26 Oliver Hunt <​[email protected]>

Reviewed by Maciej Stachowiak.

Add specialized thunks for a char code related string functions
​https://bugs.webkit.org/show_bug.cgi?id=38177

This is a simple extension to my prior patch. Basically hoist the
existing character loading logic from the charCodeAt thunk and into
a helper function, then add a helper to load strings from the small
string cache. This allows trivial implementations of fromCharCode
and charAt.

• create_hash_table:
• jit/SpecializedThunkJIT.h: (JSC::SpecializedThunkJIT::returnJSCell): (JSC::SpecializedThunkJIT::tagReturnAsJSCell):
• jit/ThunkGenerators.cpp: (JSC::stringCharLoad): (JSC::charToString): (JSC::charCodeAtThunkGenerator): (JSC::charAtThunkGenerator): (JSC::fromCharCodeThunkGenerator):
• jit/ThunkGenerators.h:
• runtime/SmallStrings.h: (JSC::SmallStrings::singleCharacterStrings):
• runtime/StringConstructor.cpp: (JSC::StringConstructor::StringConstructor):

File:

• trunk/JavaScriptCore/runtime/SmallStrings.h (modified) (1 diff)

trunk/JavaScriptCore/runtime/SmallStrings.h

@@ -61 +61 @@
 
         unsigned count() const;
-
+#if ENABLE(JIT)
+        JSString** singleCharacterStrings() { return m_singleCharacterStrings; }
+#endif
     private:
         void createEmptyString(JSGlobalData*);