[asm] Fix lots of invalid asm.js tests

test/mjsunit/asm/uint32div.js

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var stdlib = {};
 var foreign = {};
 var heap = new ArrayBuffer(64 * 1024);
 
 function Uint32Div(divisor) {
   var name = "div_";
   name += divisor;
-  var m = eval("function Module(stdlib, foreign, heap) {\n"
-      + " \"use asm\";\n"
-      + " function " + name + "(dividend) {\n"
-      + "  return ((dividend >>> 0) / " + divisor + ") >>> 0;\n"
-      + " }\n"
-      + " return { f: " + name + "}\n"
-      + "}; Module");
+  var m = eval(
+      'function Module(stdlib, foreign, heap) {\n' +
+      ' "use asm";\n' +
+      ' function ' + name + '(dividend) {\n' +
+      '  dividend = dividend | 0;\n' +
+      '  return ((dividend >>> 0) / ' + divisor + ') | 0;\n' +
+      ' }\n' +
+      ' return { f: ' + name + '}\n' +
+      '}; Module');
   return m(stdlib, foreign, heap).f;
 }
 
 var divisors = [0, 1, 3, 4, 10, 42, 64, 100, 1024, 2147483647, 4294967295];
 for (var i in divisors) {
   var divisor = divisors[i];
   var div = Uint32Div(divisor);
   for (var dividend = 0; dividend < 4294967296; dividend += 3999773) {
-    assertEquals((dividend / divisor) >>> 0, div(dividend));
+    assertEquals((dividend / divisor) | 0, div(dividend));
   }
 }
 
 var div = (function(stdlib, foreign, heap) {
   "use asm";
   function div(dividend, divisor) {
+    dividend = dividend | 0;
+    divisor = divisor | 0;
     return (dividend >>> 0) / (divisor >>> 0) | 0;
   }
   return {div: div};
 })(stdlib, foreign, heap).div;
 
 for (var i in divisors) {
   var divisor =  divisors[i];
   for (var dividend = 0; dividend < 4294967296; dividend += 3999773) {
     assertEquals((dividend >>> 0) / (divisor >>> 0) | 0,
                  div(dividend, divisor));
   }
 }