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/*
* Copyright (C) 2017-2023 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.
*/
#pragma once
#if ENABLE(B3_JIT)
#include "AirInst.h"
#include "AirSpecial.h"
#include "MacroAssemblerPrinter.h"
#include <wtf/TZoneMalloc.h>
namespace JSC {
class CCallHelpers;
namespace Printer {
typedef Vector<B3::Air::Arg> ArgList;
// IsSameOrReference::value is true if T is the same type as U or U&. Else, it is false.
template<typename T, typename U>
static constexpr auto IsSameOrReferenceHelper(int) -> std::enable_if_t<std::is_same<T, U>::value || std::is_same<T, U&>::value, std::true_type>;
template<typename T, typename U>
static constexpr std::false_type IsSameOrReferenceHelper(...);
template<class T, typename U>
struct IsSameOrReference : public std::is_same<decltype(IsSameOrReferenceHelper<T, U>(0)), std::true_type> { };
template<typename T, typename... Arguments, typename = std::enable_if_t<IsSameOrReference<T, B3::Air::Tmp>::value || IsSameOrReference<T, Reg>::value>>
inline void appendAirArg(B3::Air::Inst& inst, T&& arg)
{
inst.args.append(std::forward<T>(arg));
}
template<typename T, typename... Arguments, typename = std::enable_if_t<!IsSameOrReference<T, B3::Air::Tmp>::value && !IsSameOrReference<T, Reg>::value>>
inline void appendAirArg(B3::Air::Inst&, T&&, int = 0) { }
inline void appendAirArgs(B3::Air::Inst&) { }
template<typename T, typename... Arguments>
inline void appendAirArgs(B3::Air::Inst& inst, T&& t, Arguments&&... others)
{
appendAirArg(inst, std::forward<T>(t));
appendAirArgs(inst, std::forward<Arguments>(others)...);
}
void printAirArg(PrintStream&, Context&);
// Printer<Arg&> is only a place-holder which PrintSpecial::generate() will later
// replace with a Printer for a register, constant, etc. as appropriate.
template<>
struct Printer<B3::Air::Tmp> : public PrintRecord {
Printer(B3::Air::Tmp&)
: PrintRecord(printAirArg)
{ }
};
template<>
struct Printer<Reg> : public PrintRecord {
Printer(Reg&)
: PrintRecord(printAirArg)
{ }
};
} // namespace Printer
namespace B3 { namespace Air {
class PrintSpecial final : public Special {
WTF_MAKE_TZONE_ALLOCATED(PrintSpecial);
public:
PrintSpecial(Printer::PrintRecordList*);
~PrintSpecial() final;
// You cannot use this register to pass arguments. It just so happens that this register is not
// used for arguments in the C calling convention. By the way, this is the only thing that causes
// this special to be specific to C calls.
static constexpr GPRReg scratchRegister = GPRInfo::nonArgGPR0;
private:
void forEachArg(Inst&, const ScopedLambda<Inst::EachArgCallback>&) final;
bool isValid(Inst&) final;
bool admitsStack(Inst&, unsigned argIndex) final;
bool admitsExtendedOffsetAddr(Inst&, unsigned) final;
void reportUsedRegisters(Inst&, const RegisterSetBuilder&) final;
MacroAssembler::Jump generate(Inst&, CCallHelpers&, GenerationContext&) final;
RegisterSetBuilder extraEarlyClobberedRegs(Inst&) final;
RegisterSetBuilder extraClobberedRegs(Inst&) final;
void dumpImpl(PrintStream&) const final;
void deepDumpImpl(PrintStream&) const final;
static constexpr unsigned specialArgOffset = 0;
static constexpr unsigned numSpecialArgs = 1;
static constexpr unsigned calleeArgOffset = numSpecialArgs;
static constexpr unsigned numCalleeArgs = 1;
static constexpr unsigned returnGPArgOffset = numSpecialArgs + numCalleeArgs;
static constexpr unsigned numReturnGPArgs = 2;
static constexpr unsigned returnFPArgOffset = numSpecialArgs + numCalleeArgs + numReturnGPArgs;
static constexpr unsigned numReturnFPArgs = 1;
static constexpr unsigned argArgOffset =
numSpecialArgs + numCalleeArgs + numReturnGPArgs + numReturnFPArgs;
Printer::PrintRecordList* m_printRecordList;
};
} } } // namespace JSC::B3::Air
#endif // ENABLE(B3_JIT)
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