Add a compare stub on ARM.

test/mjsunit/compare-nan.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 10 matching lines @@
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 var a = [NaN, -1, 0, 1, 1.2, -7.9, true, false, 'foo', '0', 'NaN' ];
 for (var i in a) {
   var x = a[i];
-  assertFalse(NaN == x); 
-  assertFalse(NaN === x); 
-  assertFalse(NaN < x);
-  assertFalse(NaN > x);
-  assertFalse(NaN <= x);
-  assertFalse(NaN >= x);
+  assertFalse(NaN == x, "NaN == " + x);
+  assertFalse(NaN === x, "NaN === " + x);
+  assertFalse(NaN < x, "NaN < " + x);
+  assertFalse(NaN > x, "NaN > " + x);
+  assertFalse(NaN <= x, "NaN <= " + x);
+  assertFalse(NaN >= x, "NaN >= " + x);
 
-  assertFalse(x == NaN); 
-  assertFalse(x === NaN); 
-  assertFalse(x < NaN);
-  assertFalse(x > NaN);
-  assertFalse(x <= NaN);
-  assertFalse(x >= NaN);
+  assertFalse(x == NaN, "" + x + " == NaN");
+  assertFalse(x === NaN, "" + x + " === NaN");
+  assertFalse(x < NaN, "" + x + " < NaN");
+  assertFalse(x > NaN, "" + x + " > NaN");
+  assertFalse(x <= NaN, "" + x + " <= NaN");
+  assertFalse(x >= NaN, "" + x + " >= NaN");
 }