X-Git-Url: https://git.saurik.com/apple/javascriptcore.git/blobdiff_plain/4be4e30906bcb8ee30b4d189205cb70bad6707ce..81345200c95645a1b0d2635520f96ad55dfde63f:/ftl/FTLInlineCacheSize.cpp

diff --git a/ftl/FTLInlineCacheSize.cpp b/ftl/FTLInlineCacheSize.cpp
new file mode 100644
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+++ b/ftl/FTLInlineCacheSize.cpp
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+/*
+ * Copyright (C) 2013, 2014 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. 
+ */
+
+#include "config.h"
+#include "FTLInlineCacheSize.h"
+
+#if ENABLE(FTL_JIT)
+
+#include "JITInlineCacheGenerator.h"
+#include "MacroAssembler.h"
+
+namespace JSC { namespace FTL {
+
+// The default sizes are x86-64-specific, and were found empirically. They have to cover the worst
+// possible combination of registers leading to the largest possible encoding of each instruction in
+// the IC.
+//
+// FIXME: The ARM64 sizes are overestimates; if there is any branch compaction then we should be able
+// to get away with less. The branch compaction code currently validates the size of the IC before
+// doing any compaction, so we need to overestimate and give the uncompacted size. This would be
+// relatively easy to fix.
+// https://bugs.webkit.org/show_bug.cgi?id=129335
+
+size_t sizeOfGetById()
+{
+#if CPU(ARM64)
+    return 36;
+#else
+    return 30;
+#endif
+}
+
+size_t sizeOfPutById()
+{
+#if CPU(ARM64)
+    return 44;
+#else
+    return 32;
+#endif
+}
+
+size_t sizeOfCall()
+{
+#if CPU(ARM64)
+    return 56;
+#else
+    return 53;
+#endif
+}
+
+} } // namespace JSC::FTL
+
+#endif // ENABLE(FTL_JIT)
+