Revert "[SAB] Move Atomics builtins to C++"

src/js/prologue.js

Index: src/js/prologue.js
diff --git a/src/js/prologue.js b/src/js/prologue.js
index 59949344656b14a13069ff1f44cb05da9add3eb7..4b40d9a0fd0f289bb58db9e94c56bd75e496df0c 100644
--- a/src/js/prologue.js
+++ b/src/js/prologue.js
@@ -12,18 +12,33 @@
 // Utils
 
 var imports = UNDEFINED;
+var imports_from_experimental = UNDEFINED;
 var exports_container = %ExportFromRuntime({});
+var typed_array_setup = UNDEFINED;
+
+// Register context value to be initialized with a typed array in
+// Genesis::InitializeBuiltinTypedArrays.
+function SetupTypedArray(f) {
+  f.next = typed_array_setup;
+  typed_array_setup = f;
+}
 
 // Export to other scripts.
+// In normal natives, this exports functions to other normal natives.
+// In experimental natives, this exports to other experimental natives and
+// to normal natives that import using utils.ImportFromExperimental.
 function Export(f) {
   f(exports_container);
 }
 
 
-// Import from other scripts. The actual importing happens in PostNatives so
-// that we can import from scripts executed later. However, that means that
-// the import is not available until the very end. If the import needs to be
-// available immediately, use ImportNow.
+// Import from other scripts. The actual importing happens in PostNatives and
+// PostExperimental so that we can import from scripts executed later. However,
+// that means that the import is not available until the very end. If the
+// import needs to be available immediate, use ImportNow.
+// In normal natives, this imports from other normal natives.
+// In experimental natives, this imports from other experimental natives and
+// whitelisted exports from normal natives.
 function Import(f) {
   f.next = imports;
   imports = f;
@@ -38,6 +53,14 @@ function ImportNow(name) {
 }
 
 
+// In normal natives, import from experimental natives.
+// Not callable from experimental natives.
+function ImportFromExperimental(f) {
+  f.next = imports_from_experimental;
+  imports_from_experimental = f;
+}
+
+
 function SetFunctionName(f, name, prefix) {
   if (IS_SYMBOL(name)) {
     name = "[" + %SymbolDescription(name) + "]";
@@ -142,13 +165,82 @@ function PostNatives(utils) {
     imports(exports_container);
   }
 
+  // Whitelist of exports from normal natives to experimental natives and debug.
+  var expose_list = [
+    "FormatDateToParts",
+    "MapEntries",
+    "MapIteratorNext",
+    "MaxSimple",
+    "MinSimple",
+    "SetIteratorNext",
+    "SetValues",
+    "ToLocaleLowerCaseI18N",
+    "ToLocaleUpperCaseI18N",
+    "ToLowerCaseI18N",
+    "ToUpperCaseI18N",
+    // From runtime:
+    "promise_result_symbol",
+    "promise_state_symbol",
+    "reflect_apply",
+    "to_string_tag_symbol",
+  ];
+
+  var filtered_exports = {};
+  %OptimizeObjectForAddingMultipleProperties(
+      filtered_exports, expose_list.length);
+  for (var key of expose_list) {
+    filtered_exports[key] = exports_container[key];
+  }
+  %ToFastProperties(filtered_exports);
+  exports_container = filtered_exports;
+
+  utils.PostNatives = UNDEFINED;
+  utils.ImportFromExperimental = UNDEFINED;
+}
+
+
+function PostExperimentals(utils) {
+  %CheckIsBootstrapping();
+  for ( ; !IS_UNDEFINED(imports); imports = imports.next) {
+    imports(exports_container);
+  }
+  for ( ; !IS_UNDEFINED(imports_from_experimental);
+          imports_from_experimental = imports_from_experimental.next) {
+    imports_from_experimental(exports_container);
+  }
+
+  utils.Export = UNDEFINED;
+  utils.PostDebug = UNDEFINED;
+  utils.PostExperimentals = UNDEFINED;
+  typed_array_setup = UNDEFINED;
+}
+
+
+function PostDebug(utils) {
+  for ( ; !IS_UNDEFINED(imports); imports = imports.next) {
+    imports(exports_container);
+  }
+
   exports_container = UNDEFINED;
+
   utils.Export = UNDEFINED;
   utils.Import = UNDEFINED;
   utils.ImportNow = UNDEFINED;
-  utils.PostNatives = UNDEFINED;
+  utils.PostDebug = UNDEFINED;
+  utils.PostExperimentals = UNDEFINED;
+  typed_array_setup = UNDEFINED;
+}
+
+
+function InitializeBuiltinTypedArrays(utils, rng_state, rempio2result) {
+  var setup_list =  typed_array_setup;
+
+  for ( ; !IS_UNDEFINED(setup_list); setup_list = setup_list.next) {
+    setup_list(rng_state, rempio2result);
+  }
 }
 
+
 // -----------------------------------------------------------------------
 
 %OptimizeObjectForAddingMultipleProperties(utils, 14);
@@ -156,6 +248,7 @@ function PostNatives(utils) {
 utils.Import = Import;
 utils.ImportNow = ImportNow;
 utils.Export = Export;
+utils.ImportFromExperimental = ImportFromExperimental;
 utils.SetFunctionName = SetFunctionName;
 utils.InstallConstants = InstallConstants;
 utils.InstallFunctions = InstallFunctions;
@@ -163,6 +256,8 @@ utils.InstallGetter = InstallGetter;
 utils.OverrideFunction = OverrideFunction;
 utils.SetUpLockedPrototype = SetUpLockedPrototype;
 utils.PostNatives = PostNatives;
+utils.PostExperimentals = PostExperimentals;
+utils.PostDebug = PostDebug;
 
 %ToFastProperties(utils);