The Tor Browser / file revision

 /* Handle recompilations triggered by native calls. */

 function dofloor(v)

 {

   var res = "";

   for (var i = 0; i < 10; i++) {

     var q = Math.floor(v + i);

     res += q + ",";

   }

   assertEq(res, "2147483642,2147483643,2147483644,2147483645,2147483646,2147483647,2147483648,2147483649,2147483650,2147483651,");

 }

 dofloor(0x7ffffffa + .5);

 function mapfloor(a)

 {

   var b = a.map(function(v) { return Math.floor(v); });

   var res = "";

   for (var i = 0; i < b.length; i++)

     res += b[i] + ",";

   return res;

 }

 mapfloor([1,2]);

 mapfloor([3,4]);

 assertEq(mapfloor([0x7ffffffa + 2.5, 0x7ffffffa + 20.5]), "2147483644,2147483662,");