fix and optimize typed array loads in Frame

kripken · Dec 18, 2014 · d78dde6 · d78dde6
1 parent 39a7b0a
commit d78dde6
Showing 1 changed file with 6 additions and 9 deletions.
diff --git a/context.ts b/context.ts
@@ -45,23 +45,20 @@ module J2ME {
       return this.read8() << 8 | this.read8();
     }
 
-    read32(): number {
+    read32signed(): number {
       return this.read16() << 16 | this.read16();
     }
 
     read8signed(): number {
-      var x = this.read8();
-      return (x > 0x7f) ? (x - 0x100) : x;
+      return this.read8() << 24 >> 24;
     }
 
     read16signed(): number {
-      var x = this.read16();
-      return (x > 0x7fff) ? (x - 0x10000) : x;
+      return this.read16() << 16 >> 16;
     }
 
-    read32signed(): number {
-      var x = this.read32();
-      return (x > 0x7fffffff) ? (x - 0x100000000) : x;
+    read32(): number {
+      return this.read32() >>> 0;
     }
 
     /**
@@ -492,4 +489,4 @@ module J2ME {
 }
 
 var Context = J2ME.Context;
-var Frame = J2ME.Frame;
+var Frame = J2ME.Frame;