[Atomics] Remove support for atomic accesses on floating-point values.

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();
 
 // -------------------------------------------------------------------
 // Imports
 
 var GlobalObject = global.Object;
 var MathMax;
 var ToNumber;
 var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
 
 utils.Import(function(from) {
   MathMax = from.MathMax;
   ToNumber = from.ToNumber;
 });
 
 // -------------------------------------------------------------------
 
 
-function CheckSharedTypedArray(sta) {
-  if (!%IsSharedTypedArray(sta)) {
-    throw MakeTypeError(kNotSharedTypedArray, sta);
-  }
-}
-
 function CheckSharedIntegerTypedArray(ia) {
   if (!%IsSharedIntegerTypedArray(ia)) {
     throw MakeTypeError(kNotIntegerSharedTypedArray, ia);
   }
 }
 
 function CheckSharedInteger32TypedArray(ia) {
   CheckSharedIntegerTypedArray(ia);
   if (%_ClassOf(ia) !== 'Int32Array') {
     throw MakeTypeError(kNotInt32SharedTypedArray, ia);
   }
 }
 
 //-------------------------------------------------------------------
 
 function AtomicsCompareExchangeJS(sta, index, oldValue, newValue) {
-  CheckSharedTypedArray(sta);
+  CheckSharedIntegerTypedArray(sta);
   index = $toInteger(index);
   if (index < 0 || index >= %_TypedArrayGetLength(sta)) {
     return UNDEFINED;
   }
   oldValue = ToNumber(oldValue);
   newValue = ToNumber(newValue);
   return %_AtomicsCompareExchange(sta, index, oldValue, newValue);
 }
 
 function AtomicsLoadJS(sta, index) {
-  CheckSharedTypedArray(sta);
+  CheckSharedIntegerTypedArray(sta);
   index = $toInteger(index);
   if (index < 0 || index >= %_TypedArrayGetLength(sta)) {
     return UNDEFINED;
   }
   return %_AtomicsLoad(sta, index);
 }
 
 function AtomicsStoreJS(sta, index, value) {
-  CheckSharedTypedArray(sta);
+  CheckSharedIntegerTypedArray(sta);
   index = $toInteger(index);
   if (index < 0 || index >= %_TypedArrayGetLength(sta)) {
     return UNDEFINED;
   }
   value = ToNumber(value);
   return %_AtomicsStore(sta, index, value);
 }
 
 function AtomicsAddJS(ia, index, value) {
   CheckSharedIntegerTypedArray(ia);
@@ skipping 132 matching lines @@
   "or", AtomicsOrJS,
   "xor", AtomicsXorJS,
   "exchange", AtomicsExchangeJS,
   "isLockFree", AtomicsIsLockFreeJS,
   "futexWait", AtomicsFutexWaitJS,
   "futexWake", AtomicsFutexWakeJS,
   "futexWakeOrRequeue", AtomicsFutexWakeOrRequeueJS,
 ]);
 
 })