1 files changed, 105 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/bytecode/PutByIdFlags.h b/Source/JavaScriptCore/bytecode/PutByIdFlags.h
new file mode 100644
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+++ b/Source/JavaScriptCore/bytecode/PutByIdFlags.h
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+/*
+ * Copyright (C) 2015 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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 with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#ifndef PutByIdFlags_h
+#define PutByIdFlags_h
+
+#include "StructureIDTable.h"
+
+namespace JSC {
+
+enum PutByIdFlags : intptr_t {
+    PutByIdNone = 0,
+
+    // This flag indicates that the put_by_id is direct. That means that we store the property without
+    // checking if the prototype chain has a setter.
+    PutByIdIsDirect = 0x1,
+    PutByIdPersistentFlagsMask = 0x1,
+
+    // NOTE: The values below must be in sync with what is in LowLevelInterpreter.asm.
+
+    // Determining the required inferred type involves first checking the primary type mask, and then
+    // using that to figure out the meaning of the secondary mask:
+    // switch (flags & PutByIdPrimaryTypeMask) {
+    // case PutByIdPrimaryTypeSecondary:
+    //     switch (flags & PutByIdSecondaryTypeMask) {
+    //     ...
+    //     }
+    //     break;
+    // case PutByIdPrimaryTypeObjectWithStructure:
+    // case PutByIdPrimaryTypeObjectWithStructureOrOther:
+    //     StructureID structureID = decodeStructureID(flags);
+    //     break;
+    // }
+    PutByIdPrimaryTypeMask = 0x6,
+    PutByIdPrimaryTypeSecondary = 0x0, // Need to check the secondary type mask for the type.
+    PutByIdPrimaryTypeObjectWithStructure = 0x2, // Secondary type has structure ID.
+    PutByIdPrimaryTypeObjectWithStructureOrOther = 0x4, // Secondary type has structure ID.
+
+    PutByIdSecondaryTypeMask = -0x8,
+    PutByIdSecondaryTypeBottom = 0x0,
+    PutByIdSecondaryTypeBoolean = 0x8,
+    PutByIdSecondaryTypeOther = 0x10,
+    PutByIdSecondaryTypeInt32 = 0x18,
+    PutByIdSecondaryTypeNumber = 0x20,
+    PutByIdSecondaryTypeString = 0x28,
+    PutByIdSecondaryTypeSymbol = 0x30,
+    PutByIdSecondaryTypeObject = 0x38,
+    PutByIdSecondaryTypeObjectOrOther = 0x40,
+    PutByIdSecondaryTypeTop = 0x48
+};
+
+inline PutByIdFlags encodeStructureID(StructureID id)
+{
+#if USE(JSVALUE64)
+    return static_cast<PutByIdFlags>(static_cast<PutByIdFlags>(id) << 3);
+#else
+    PutByIdFlags result = bitwise_cast<PutByIdFlags>(id);
+    ASSERT(!(result & ~PutByIdSecondaryTypeMask));
+    return result;
+#endif
+}
+
+inline StructureID decodeStructureID(PutByIdFlags flags)
+{
+#if USE(JSVALUE64)
+    return static_cast<StructureID>(flags >> 3);
+#else
+    return bitwise_cast<StructureID>(flags & PutByIdSecondaryTypeMask);
+#endif
+}
+
+} // namespace JSC
+
+namespace WTF {
+
+class PrintStream;
+
+void printInternal(PrintStream&, JSC::PutByIdFlags);
+
+} // namespace WTF
+
+#endif // PutByIdFlags_h
+