Use simple/fast macro version of MinMax in JS

src/harmony-atomics.js

Index: src/harmony-atomics.js
diff --git a/src/harmony-atomics.js b/src/harmony-atomics.js
index 7412494e30368e9e984174f72b642aa97ed3f7d7..e06008a16dd29d5483947904abdfa8db3a22f5c7 100644
--- a/src/harmony-atomics.js
+++ b/src/harmony-atomics.js
@@ -12,13 +12,8 @@
 // Imports
 
 var GlobalObject = global.Object;
-var MathMax;
 var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
 
-utils.Import(function(from) {
-  MathMax = from.MathMax;
-});
-
 // -------------------------------------------------------------------
 
 
@@ -146,7 +141,7 @@ function AtomicsFutexWaitJS(ia, index, value, timeout) {
     if (NUMBER_IS_NAN(timeout)) {
       timeout = INFINITY;
     } else {
-      timeout = MathMax(0, timeout);
+      timeout = MAX_SIMPLE(0, timeout);
     }
   }
   return %AtomicsFutexWait(ia, index, value, timeout);
@@ -158,14 +153,14 @@ function AtomicsFutexWakeJS(ia, index, count) {
   if (index < 0 || index >= %_TypedArrayGetLength(ia)) {
     return UNDEFINED;
   }
-  count = MathMax(0, TO_INTEGER(count));
+  count = MAX_SIMPLE(0, TO_INTEGER(count));

[Michael Starzinger, 2015/10/07 19:02:23]

I don't have a machine where I could verify this right now, but I am pretty sure
this is observable now ...

Atomics.futexWait(a, 0, something_that_observes_ToNumber)

   return %AtomicsFutexWake(ia, index, count);
 }
 
 function AtomicsFutexWakeOrRequeueJS(ia, index1, count, value, index2) {
   CheckSharedInteger32TypedArray(ia);
   index1 = TO_INTEGER(index1);
-  count = MathMax(0, TO_INTEGER(count));
+  count = MAX_SIMPLE(0, TO_INTEGER(count));

[Michael Starzinger, 2015/10/07 19:02:23]

Likewise.

   value = TO_INT32(value);
   index2 = TO_INTEGER(index2);
   if (index1 < 0 || index1 >= %_TypedArrayGetLength(ia) ||