Intrinsify writing to Uint8 and Int8 arrays on IA32.

tests/standalone/byte_array_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 //
 // Dart test program for testing native byte arrays.
 
 // Library tag to be able to run in html test framework.
 #library("ByteArrayTest.dart");
 
 #import('dart:scalarlist');
 
 void testCreateByteArray() {
   Uint8List byteArray;
 
   byteArray = new Uint8List(0);
   Expect.equals(0, byteArray.length);
 
   byteArray = new Uint8List(10);
   Expect.equals(10, byteArray.length);
   for (int i = 0; i < 10; i++) {
     Expect.equals(0, byteArray[i]);
   }
+  
+}
+
+void testUnsignedByteArrayRange() {
+  Uint8List byteArray;
+  byteArray = new Uint8List(10);
+
+  byteArray[1] = 255;
+  Expect.equals(255, byteArray[1]);
+  byteArray[1] = 0;
+  Expect.equals(0, byteArray[1]);
+  
+  // These should eventually throw.

[srdjan, 2012/10/16 17:56:01]

Don't they throw?
You can use Expect.throws(...) to verify.

+  byteArray[1] = 256;
+  byteArray[1] = -1;
+  byteArray[2] = -129;
+}
+
+void testByteArrayRange() {
+  Int8List byteArray;
+  byteArray = new Int8List(10);
+  byteArray[1] = 0;
+  Expect.equals(0, byteArray[1]);
+  byteArray[2] = -128;
+  Expect.equals(-128, byteArray[2]);
+  byteArray[3] = 127;
+  Expect.equals(127, byteArray[3]);
+  // This should eventually throw.

[srdjan, 2012/10/16 17:56:01]

ditto

+  byteArray[0] = 128;
+  byteArray[4] = -129;
 }
 
 void testSetRange() {
   Uint8List byteArray = new Uint8List(3);
 
   List<int> list = [10, 11, 12];
   byteArray.setRange(0, 3, list);
   for (int i = 0; i < 3; i++) {
     Expect.equals(10 + i, byteArray[i]);
   }
@@ skipping 41 matching lines @@
   }
   Expect.equals(0, list.indexOf(10.0));
   Expect.equals(5, list.indexOf(15.0));
   Expect.equals(9, list.indexOf(19.0));
   Expect.equals(-1, list.indexOf(20.0));
 }
 
 main() {
   for (int i = 0; i < 2000; i++) {
     testCreateByteArray();
+    testByteArrayRange();
+    testUnsignedByteArrayRange();
     testSetRange();
     testIndexOutOfRange();
     testIndexOf();
   }
 }