JavaScriptCore-7600.1.4.9.tar.gz

[apple/javascriptcore.git] / jit / RegisterSet.h

diff --git a/jit/RegisterSet.h b/jit/RegisterSet.h
new file mode 100644 (file)
index 0000000..44bfecd
--- /dev/null
+++ b/jit/RegisterSet.h
@@ -0,0 +1,148 @@
+/*
+ * 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. 
+ */
+
+#ifndef RegisterSet_h
+#define RegisterSet_h
+
+#if ENABLE(JIT)
+
+#include "FPRInfo.h"
+#include "GPRInfo.h"
+#include "MacroAssembler.h"
+#include "Reg.h"
+#include "TempRegisterSet.h"
+#include <wtf/BitVector.h>
+
+namespace JSC {
+
+class RegisterSet {
+public:
+    template<typename... Regs>
+    explicit RegisterSet(Regs... regs)
+    {
+        setMany(regs...);
+    }
+    
+    static RegisterSet stackRegisters();
+    static RegisterSet reservedHardwareRegisters();
+    static RegisterSet runtimeRegisters();
+    static RegisterSet specialRegisters(); // The union of stack, reserved hardware, and runtime registers.
+    static RegisterSet calleeSaveRegisters();
+    static RegisterSet allGPRs();
+    static RegisterSet allFPRs();
+    static RegisterSet allRegisters();
+    
+    void set(Reg reg, bool value = true)
+    {
+        ASSERT(!!reg);
+        m_vector.set(reg.index(), value);
+    }
+    
+    void set(JSValueRegs regs)
+    {
+        if (regs.tagGPR() != InvalidGPRReg)
+            set(regs.tagGPR());
+        set(regs.payloadGPR());
+    }
+    
+    void clear(Reg reg)
+    {
+        ASSERT(!!reg);
+        set(reg, false);
+    }
+    
+    bool get(Reg reg) const
+    {
+        ASSERT(!!reg);
+        return m_vector.get(reg.index());
+    }
+    
+    void merge(const RegisterSet& other) { m_vector.merge(other.m_vector); }
+    void filter(const RegisterSet& other) { m_vector.filter(other.m_vector); }
+    void exclude(const RegisterSet& other) { m_vector.exclude(other.m_vector); }
+    
+    size_t numberOfSetGPRs() const;
+    size_t numberOfSetFPRs() const;
+    size_t numberOfSetRegisters() const { return m_vector.bitCount(); }
+    
+    void dump(PrintStream&) const;
+    
+    enum EmptyValueTag { EmptyValue };
+    enum DeletedValueTag { DeletedValue };
+    
+    RegisterSet(EmptyValueTag)
+        : m_vector(BitVector::EmptyValue)
+    {
+    }
+    
+    RegisterSet(DeletedValueTag)
+        : m_vector(BitVector::DeletedValue)
+    {
+    }
+    
+    bool isEmptyValue() const { return m_vector.isEmptyValue(); }
+    bool isDeletedValue() const { return m_vector.isDeletedValue(); }
+    
+    bool operator==(const RegisterSet& other) const { return m_vector == other.m_vector; }
+    unsigned hash() const { return m_vector.hash(); }
+    
+private:
+    void setAny(Reg reg) { set(reg); }
+    void setAny(const RegisterSet& set) { merge(set); }
+    void setMany() { }
+    template<typename RegType, typename... Regs>
+    void setMany(RegType reg, Regs... regs)
+    {
+        setAny(reg);
+        setMany(regs...);
+    }
+
+    BitVector m_vector;
+};
+
+struct RegisterSetHash {
+    static unsigned hash(const RegisterSet& set) { return set.hash(); }
+    static bool equal(const RegisterSet& a, const RegisterSet& b) { return a == b; }
+    static const bool safeToCompareToEmptyOrDeleted = false;
+};
+
+} // namespace JSC
+
+namespace WTF {
+
+template<typename T> struct DefaultHash;
+template<> struct DefaultHash<JSC::RegisterSet> {
+    typedef JSC::RegisterSetHash Hash;
+};
+
+template<typename T> struct HashTraits;
+template<> struct HashTraits<JSC::RegisterSet> : public CustomHashTraits<JSC::RegisterSet> { };
+
+} // namespace WTF
+
+#endif // ENABLE(JIT)
+
+#endif // RegisterSet_h
+