Add inlined implementation of Math.round.

test/mjsunit/asm/math-round.js

Index: test/mjsunit/asm/math-round.js
diff --git a/test/mjsunit/asm/math-floor.js b/test/mjsunit/asm/math-round.js
similarity index 68%
copy from test/mjsunit/asm/math-floor.js
copy to test/mjsunit/asm/math-round.js
index e8c3f341bbd7998849a6c10c60185cfa9d8904b6..4837c89991407f03975728aa99d0f5c0db261ee3 100644
--- a/test/mjsunit/asm/math-floor.js
+++ b/test/mjsunit/asm/math-round.js
@@ -5,12 +5,12 @@
 function Module(stdlib) {
   "use asm";
 
-  var floor = stdlib.Math.floor;
+  var round = stdlib.Math.round;
 
   // f: double -> float
   function f(a) {
     a = +a;
-    return floor(a);
+    return round(a);
   }
 
   return { f: f };
@@ -26,13 +26,16 @@ assertEquals(0,                   f(0));
 assertEquals(+0,                  f(+0));
 assertEquals(-0,                  f(-0));
 assertEquals(0,                   f(0.49999));
-assertEquals(+0,                  f(0.6));
-assertEquals(+0,                  f(0.5));
-assertEquals(-1,                  f(-0.1));
-assertEquals(-1,                  f(-0.5));
+assertEquals(1,                   f(0.6));
+assertEquals(1,                   f(0.5));
+assertEquals(-0,                  f(-0.1));
+assertEquals(-0,                  f(-0.5));
 assertEquals(-1,                  f(-0.6));
 assertEquals(-2,                  f(-1.6));
 assertEquals(-1,                  f(-0.50001));
+assertEquals(0,                   f(0.49999999999999994));
 
+assertEquals("Infinity", String(1/f(0)));
+assertEquals("-Infinity", String(1/f(-0)));
 assertEquals("Infinity", String(f(Infinity)));
 assertEquals("-Infinity", String(f(-Infinity)));