Increase precision when finding the remainder after division by pi/2.

test/mjsunit/mjsunit.js

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 36 matching lines @@
 // values.
 // For known primitive values, please use assertEquals.
 var assertSame;
 
 // Expected and found values are identical primitive values or functions
 // or similarly structured objects (checking internal properties
 // of, e.g., Number and Date objects, the elements of arrays
 // and the properties of non-Array objects).
 var assertEquals;
 
+
+// The difference between expected and found value is within certain tolerance.
+var assertEqualsDelta;
+
 // The found object is an Array with the same length and elements
 // as the expected object. The expected object doesn't need to be an Array,
 // as long as it's "array-ish".
 var assertArrayEquals;
 
 // The found object must have the same enumerable properties as the
 // expected object. The type of object isn't checked.
 var assertPropertiesEqual;
 
 // Assert that the string conversion of the found value is equal to
@@ skipping 173 matching lines @@
   };
 
 
   assertEquals = function assertEquals(expected, found, name_opt) {
     if (!deepEquals(found, expected)) {
       fail(PrettyPrint(expected), found, name_opt);
     }
   };
 
 
+  assertEqualsDelta =
+      function assertEqualsDelta(expected, found, delta, name_opt) {
+    assertTrue(Math.abs(expected - found) <= delta, name_opt);
+  };
+
+
   assertArrayEquals = function assertArrayEquals(expected, found, name_opt) {
     var start = "";
     if (name_opt) {
       start = name_opt + " - ";
     }
     assertEquals(expected.length, found.length, start + "array length");
     if (expected.length == found.length) {
       for (var i = 0; i < expected.length; ++i) {
         assertEquals(expected[i], found[i],
                      start + "array element at index " + i);
@@ skipping 117 matching lines @@
     assertTrue(OptimizationStatus(fun, sync_opt) != 1, name_opt);
   }
 
   assertOptimized = function assertOptimized(fun, sync_opt, name_opt) {
     if (sync_opt === undefined) sync_opt = "";
     assertTrue(OptimizationStatus(fun, sync_opt) != 2, name_opt);
   }
 
 })();