Truncate rather than round to nearest when performing float-to-integer...

src/ic.cc

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 336 matching lines @@
   PatchInlinedStore(address, Heap::fixed_array_map());
 }
 
 
 void KeyedStoreIC::Clear(Address address, Code* target) {
   if (target->ic_state() == UNINITIALIZED) return;
   SetTargetAtAddress(address, initialize_stub());
 }
 
 
-Code* KeyedLoadIC::external_array_stub(JSObject::ElementsKind elements_kind) {
-  switch (elements_kind) {
-    case JSObject::EXTERNAL_BYTE_ELEMENTS:
-      return Builtins::builtin(Builtins::KeyedLoadIC_ExternalByteArray);
-    case JSObject::EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
-      return Builtins::builtin(Builtins::KeyedLoadIC_ExternalUnsignedByteArray);
-    case JSObject::EXTERNAL_SHORT_ELEMENTS:
-      return Builtins::builtin(Builtins::KeyedLoadIC_ExternalShortArray);
-    case JSObject::EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
-      return Builtins::builtin(
-          Builtins::KeyedLoadIC_ExternalUnsignedShortArray);
-    case JSObject::EXTERNAL_INT_ELEMENTS:
-      return Builtins::builtin(Builtins::KeyedLoadIC_ExternalIntArray);
-    case JSObject::EXTERNAL_UNSIGNED_INT_ELEMENTS:
-      return Builtins::builtin(Builtins::KeyedLoadIC_ExternalUnsignedIntArray);
-    case JSObject::EXTERNAL_FLOAT_ELEMENTS:
-      return Builtins::builtin(Builtins::KeyedLoadIC_ExternalFloatArray);
-    default:
-      UNREACHABLE();
-      return NULL;
-  }
-}
-
-
-Code* KeyedStoreIC::external_array_stub(JSObject::ElementsKind elements_kind) {
-  switch (elements_kind) {
-    case JSObject::EXTERNAL_BYTE_ELEMENTS:
-      return Builtins::builtin(Builtins::KeyedStoreIC_ExternalByteArray);
-    case JSObject::EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
-      return Builtins::builtin(
-          Builtins::KeyedStoreIC_ExternalUnsignedByteArray);
-    case JSObject::EXTERNAL_SHORT_ELEMENTS:
-      return Builtins::builtin(Builtins::KeyedStoreIC_ExternalShortArray);
-    case JSObject::EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
-      return Builtins::builtin(
-          Builtins::KeyedStoreIC_ExternalUnsignedShortArray);
-    case JSObject::EXTERNAL_INT_ELEMENTS:
-      return Builtins::builtin(Builtins::KeyedStoreIC_ExternalIntArray);
-    case JSObject::EXTERNAL_UNSIGNED_INT_ELEMENTS:
-      return Builtins::builtin(Builtins::KeyedStoreIC_ExternalUnsignedIntArray);
-    case JSObject::EXTERNAL_FLOAT_ELEMENTS:
-      return Builtins::builtin(Builtins::KeyedStoreIC_ExternalFloatArray);
-    default:
-      UNREACHABLE();
-      return NULL;
-  }
-}
-
-
 static bool HasInterceptorGetter(JSObject* object) {
   return !object->GetNamedInterceptor()->getter()->IsUndefined();
 }
 
 
 static void LookupForRead(Object* object,
                           String* name,
                           LookupResult* lookup) {
   AssertNoAllocation no_gc;  // pointers must stay valid
 
@@ skipping 713 matching lines @@
   // the global object).
   bool use_ic = FLAG_use_ic && !object->IsAccessCheckNeeded();
 
   if (use_ic) {
     Code* stub = generic_stub();
     if (object->IsString() && key->IsNumber()) {
       stub = string_stub();
     } else if (object->IsJSObject()) {
       Handle<JSObject> receiver = Handle<JSObject>::cast(object);
       if (receiver->HasExternalArrayElements()) {
-        stub = external_array_stub(receiver->GetElementsKind());
+        MaybeObject* probe =
+            StubCache::ComputeKeyedLoadOrStoreExternalArray(*receiver, false);
+        stub =
+            probe->IsFailure() ? NULL : Code::cast(probe->ToObjectUnchecked());
       } else if (receiver->HasIndexedInterceptor()) {
         stub = indexed_interceptor_stub();
       } else if (state == UNINITIALIZED &&
                  key->IsSmi() &&
                  receiver->map()->has_fast_elements()) {
         MaybeObject* probe = StubCache::ComputeKeyedLoadSpecialized(*receiver);
         stub =
             probe->IsFailure() ? NULL : Code::cast(probe->ToObjectUnchecked());
       }
     }
@@ skipping 372 matching lines @@
   // Do not use ICs for objects that require access checks (including
   // the global object).
   bool use_ic = FLAG_use_ic && !object->IsAccessCheckNeeded();
   ASSERT(!(use_ic && object->IsJSGlobalProxy()));
 
   if (use_ic) {
     Code* stub = generic_stub();
     if (object->IsJSObject()) {
       Handle<JSObject> receiver = Handle<JSObject>::cast(object);
       if (receiver->HasExternalArrayElements()) {
-        stub = external_array_stub(receiver->GetElementsKind());
+        MaybeObject* probe =
+            StubCache::ComputeKeyedLoadOrStoreExternalArray(*receiver, true);
+        stub =
+            probe->IsFailure() ? NULL : Code::cast(probe->ToObjectUnchecked());
       } else if (state == UNINITIALIZED &&
                  key->IsSmi() &&
                  receiver->map()->has_fast_elements()) {
         MaybeObject* probe = StubCache::ComputeKeyedStoreSpecialized(*receiver);
         stub =
             probe->IsFailure() ? NULL : Code::cast(probe->ToObjectUnchecked());
       }
     }
     if (stub != NULL) set_target(stub);
   }
@@ skipping 621 matching lines @@
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) {
   return IC_utilities[id];
 }
 
 
 } }  // namespace v8::internal