Changeset 34964 in webkit for trunk/JavaScriptCore/VM/Machine.h

Timestamp:

Jul 2, 2008, 5:47:00 PM (17 years ago)

Author:

[email protected]

Message:

2008-07-02 Geoffrey Garen <​[email protected]>

Reviewed by Oliver Hunt.

Optimized a[n] get for cases where a is an array or a string, and a[n]
put for cases where a is an array.

SunSpider says 9.0% faster.

File:

• trunk/JavaScriptCore/VM/Machine.h (modified) (3 diffs)

trunk/JavaScriptCore/VM/Machine.h

@@ -30 +30 @@
 #define Machine_h
 
+#include "JSCell.h"
+#include "JSValue.h"
 #include "Opcode.h"
 #include "RegisterFile.h"
@@ -141 +143 @@
         void resetTimeoutCheck();
 
+        bool isJSArray(JSValue* v) { return !JSImmediate::isImmediate(v) && v->asCell()->vptr() == m_jsArrayVptr; }
+        bool isJSString(JSValue* v) { return !JSImmediate::isImmediate(v) && v->asCell()->vptr() == m_jsStringVptr; }
+        
         int m_reentryDepth;
         unsigned m_timeoutTime;
@@ -149 +154 @@
 
         RegisterFile m_registerFile;
+        
+        void* m_jsArrayVptr;
+        void* m_jsStringVptr;
 
 #if HAVE(COMPUTED_GOTO)