[runtime] Simplify TO_INT32/TO_UINT32 abstract operations.

src/harmony-atomics.js

 // Copyright 2015 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(global, utils) {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
@@ skipping 154 matching lines @@
     return UNDEFINED;
   }
   count = MathMax(0, $toInteger(count));
   return %AtomicsFutexWake(ia, index, count);
 }
 
 function AtomicsFutexWakeOrRequeueJS(ia, index1, count, value, index2) {
   CheckSharedInteger32TypedArray(ia);
   index1 = $toInteger(index1);
   count = MathMax(0, $toInteger(count));
-  value = $toInt32(value);
+  value = TO_INT32(value);
   index2 = $toInteger(index2);
   if (index1 < 0 || index1 >= %_TypedArrayGetLength(ia) ||
       index2 < 0 || index2 >= %_TypedArrayGetLength(ia)) {
     return UNDEFINED;
   }
   return %AtomicsFutexWakeOrRequeue(ia, index1, count, value, index2);
 }
 
 // -------------------------------------------------------------------
 
@@ skipping 24 matching lines @@
   "or", AtomicsOrJS,
   "xor", AtomicsXorJS,
   "exchange", AtomicsExchangeJS,
   "isLockFree", AtomicsIsLockFreeJS,
   "futexWait", AtomicsFutexWaitJS,
   "futexWake", AtomicsFutexWakeJS,
   "futexWakeOrRequeue", AtomicsFutexWakeOrRequeueJS,
 ]);
 
 })