[asm] Fix lots of invalid asm.js tests

test/mjsunit/asm/math-abs.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.
 
 function Module(stdlib) {
   "use asm";
 
   var abs = stdlib.Math.abs;
 
   // f: double -> double
   function f(a) {
     a = +a;
     return +abs(a);
   }
 
   // g: unsigned -> double
   function g(a) {
-    a = a>>>0;
-    return +abs(a);
+    a = a | 0;
+    return +abs(+(a >>> 0));
   }
 
   // h: signed -> double
   function h(a) {
     a = a|0;
-    return +abs(a);
+    return +abs(+(a | 0));
   }
 
   return { f: f, g: g, h: h };
 }
 
 var m = Module({ Math: Math });
 var f = m.f;
 var g = m.g;
 var h = m.h;
 
@@ skipping 39 matching lines @@
 assertEquals(1, h(1.1));
 assertEquals(1, h(1.5));
 assertEquals(1, h(-1));
 assertEquals(1, h(-1.1));
 assertEquals(1, h(-1.5));
 
 assertEquals(Number.MIN_VALUE, f(Number.MIN_VALUE));
 assertEquals(Number.MIN_VALUE, f(-Number.MIN_VALUE));
 assertEquals(Number.MAX_VALUE, f(Number.MAX_VALUE));
 assertEquals(Number.MAX_VALUE, f(-Number.MAX_VALUE));