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/*
* Copyright (C) 2013-2016 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...);
}
JS_EXPORT_PRIVATE static RegisterSet stackRegisters();
JS_EXPORT_PRIVATE static RegisterSet reservedHardwareRegisters();
static RegisterSet runtimeRegisters();
static RegisterSet specialRegisters(); // The union of stack, reserved hardware, and runtime registers.
static RegisterSet calleeSaveRegisters();
static RegisterSet vmCalleeSaveRegisters(); // Callee save registers that might be saved and used by any tier.
static RegisterSet llintBaselineCalleeSaveRegisters(); // Registers saved and used by the LLInt.
static RegisterSet dfgCalleeSaveRegisters(); // Registers saved and used by the DFG JIT.
static RegisterSet ftlCalleeSaveRegisters(); // Registers that might be saved and used by the FTL JIT.
#if ENABLE(WEBASSEMBLY)
static RegisterSet webAssemblyCalleeSaveRegisters(); // Registers saved and used by the WebAssembly JIT.
#endif
static RegisterSet volatileRegistersForJSCall();
static RegisterSet stubUnavailableRegisters(); // The union of callee saves and special registers.
JS_EXPORT_PRIVATE static RegisterSet macroScratchRegisters();
JS_EXPORT_PRIVATE static RegisterSet allGPRs();
JS_EXPORT_PRIVATE static RegisterSet allFPRs();
static RegisterSet allRegisters();
static RegisterSet registersToNotSaveForJSCall();
static RegisterSet registersToNotSaveForCCall();
void set(Reg reg, bool value = true)
{
ASSERT(!!reg);
m_vector.set(reg.index(), value);
}
void set(JSValueRegs regs, bool value = true)
{
if (regs.tagGPR() != InvalidGPRReg)
set(regs.tagGPR(), value);
set(regs.payloadGPR(), value);
}
void clear(Reg reg)
{
ASSERT(!!reg);
set(reg, false);
}
bool get(Reg reg) const
{
ASSERT(!!reg);
return m_vector.get(reg.index());
}
template<typename Iterable>
void setAll(const Iterable& iterable)
{
for (Reg reg : iterable)
set(reg);
}
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(); }
template<typename Functor>
void forEach(const Functor& functor) const
{
for (size_t index : m_vector)
functor(Reg::fromIndex(index));
}
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
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