| /* |
| * Copyright (C) 2011-2019 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(JIT) |
| |
| #include "AssemblyHelpers.h" |
| #include "FPRInfo.h" |
| #include "GPRInfo.h" |
| #include "StackAlignment.h" |
| #include <wtf/FunctionTraits.h> |
| |
| namespace JSC { |
| |
| #if CPU(MIPS) || (OS(WINDOWS) && CPU(X86_64)) |
| #define POKE_ARGUMENT_OFFSET 4 |
| #else |
| #define POKE_ARGUMENT_OFFSET 0 |
| #endif |
| |
| class CallFrame; |
| class Structure; |
| namespace DFG { |
| class RegisteredStructure; |
| }; |
| |
| class CCallHelpers : public AssemblyHelpers { |
| public: |
| CCallHelpers(CodeBlock* codeBlock = nullptr) |
| : AssemblyHelpers(codeBlock) |
| { |
| } |
| |
| // Wrapper to encode JSCell GPR into JSValue. |
| class CellValue { |
| public: |
| explicit CellValue(GPRReg gpr) |
| : m_gpr(gpr) |
| { |
| } |
| |
| GPRReg gpr() const { return m_gpr; } |
| |
| private: |
| GPRReg m_gpr; |
| }; |
| |
| // The most general helper for setting arguments that fit in a GPR, if you can compute each |
| // argument without using any argument registers. You usually want one of the setupArguments*() |
| // methods below instead of this. This thing is most useful if you have *a lot* of arguments. |
| template<typename Functor> |
| void setupArgument(unsigned argumentIndex, const Functor& functor) |
| { |
| unsigned numberOfRegs = GPRInfo::numberOfArgumentRegisters; // Disguise the constant from clang's tautological compare warning. |
| if (argumentIndex < numberOfRegs) { |
| functor(GPRInfo::toArgumentRegister(argumentIndex)); |
| return; |
| } |
| |
| functor(GPRInfo::nonArgGPR0); |
| poke(GPRInfo::nonArgGPR0, POKE_ARGUMENT_OFFSET + argumentIndex - GPRInfo::numberOfArgumentRegisters); |
| } |
| |
| private: |
| |
| template<unsigned NumberOfRegisters, typename RegType> |
| ALWAYS_INLINE void setupStubArgs(std::array<RegType, NumberOfRegisters> destinations, std::array<RegType, NumberOfRegisters> sources) |
| { |
| if (ASSERT_ENABLED) { |
| RegisterSet set; |
| for (RegType dest : destinations) |
| set.set(dest); |
| ASSERT_WITH_MESSAGE(set.numberOfSetRegisters() == NumberOfRegisters, "Destinations should not be aliased."); |
| } |
| |
| typedef std::pair<RegType, RegType> RegPair; |
| Vector<RegPair, NumberOfRegisters> pairs; |
| |
| // if constexpr avoids warnings when NumberOfRegisters is 0. |
| if constexpr (NumberOfRegisters > 0) { |
| for (unsigned i = 0; i < NumberOfRegisters; ++i) { |
| if (sources[i] != destinations[i]) |
| pairs.append(std::make_pair(sources[i], destinations[i])); |
| } |
| } else { |
| // Silence some older compilers (GCC up to 9.X) about unused but set parameters. |
| UNUSED_PARAM(sources); |
| UNUSED_PARAM(destinations); |
| } |
| |
| #if ASSERT_ENABLED |
| auto numUniqueSources = [&] () -> unsigned { |
| RegisterSet set; |
| for (auto& pair : pairs) { |
| RegType source = pair.first; |
| set.set(source); |
| } |
| return set.numberOfSetRegisters(); |
| }; |
| |
| auto numUniqueDests = [&] () -> unsigned { |
| RegisterSet set; |
| for (auto& pair : pairs) { |
| RegType dest = pair.second; |
| set.set(dest); |
| } |
| return set.numberOfSetRegisters(); |
| }; |
| #endif |
| |
| while (pairs.size()) { |
| RegisterSet freeDestinations; |
| for (auto& pair : pairs) { |
| RegType dest = pair.second; |
| freeDestinations.set(dest); |
| } |
| for (auto& pair : pairs) { |
| RegType source = pair.first; |
| freeDestinations.clear(source); |
| } |
| |
| if (freeDestinations.numberOfSetRegisters()) { |
| bool madeMove = false; |
| for (unsigned i = 0; i < pairs.size(); i++) { |
| auto& pair = pairs[i]; |
| RegType source = pair.first; |
| RegType dest = pair.second; |
| if (freeDestinations.get(dest)) { |
| move(source, dest); |
| pairs.remove(i); |
| madeMove = true; |
| break; |
| } |
| } |
| ASSERT_UNUSED(madeMove, madeMove); |
| continue; |
| } |
| |
| ASSERT(numUniqueDests() == numUniqueSources()); |
| ASSERT(numUniqueDests() == pairs.size()); |
| // The set of source and destination registers are equivalent sets. This means we don't have |
| // any free destination registers that won't also clobber a source. We get around this by |
| // exchanging registers. |
| |
| RegType source = pairs[0].first; |
| RegType dest = pairs[0].second; |
| swap(source, dest); |
| pairs.remove(0); |
| |
| RegType newSource = source; |
| for (auto& pair : pairs) { |
| RegType source = pair.first; |
| if (source == dest) { |
| pair.first = newSource; |
| break; |
| } |
| } |
| |
| // We may have introduced pairs that have the same source and destination. Remove those now. |
| for (unsigned i = 0; i < pairs.size(); i++) { |
| auto& pair = pairs[i]; |
| if (pair.first == pair.second) { |
| pairs.remove(i); |
| i--; |
| } |
| } |
| } |
| } |
| |
| #if CPU(MIPS) || (CPU(ARM_THUMB2) && !CPU(ARM_HARDFP)) |
| template<unsigned NumCrossSources, unsigned NumberOfRegisters> |
| ALWAYS_INLINE void setupStubCrossArgs(std::array<GPRReg, NumberOfRegisters> destinations, std::array<FPRReg, NumberOfRegisters> sources) { |
| for (unsigned i = 0; i < NumCrossSources; i++) { |
| GPRReg dest = destinations[i]; |
| FPRReg source = sources[i]; |
| |
| moveDouble(source, dest); |
| } |
| } |
| #endif |
| |
| template<typename RegType> |
| using InfoTypeForReg = decltype(toInfoFromReg(RegType(-1))); |
| |
| // extraGPRArgs is used to track 64-bit argument types passed in register on 32-bit architectures. |
| // extraPoke is used to track 64-bit argument types passed on the stack. |
| template<unsigned numGPRArgs, unsigned numGPRSources, unsigned numFPRArgs, unsigned numFPRSources, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke> |
| struct ArgCollection { |
| ArgCollection() |
| { |
| gprSources.fill(InvalidGPRReg); |
| gprDestinations.fill(InvalidGPRReg); |
| fprSources.fill(InvalidFPRReg); |
| fprDestinations.fill(InvalidFPRReg); |
| crossSources.fill(InvalidFPRReg); |
| crossDestinations.fill(InvalidGPRReg); |
| } |
| |
| template<unsigned a, unsigned b, unsigned c, unsigned d, unsigned e, unsigned f, unsigned g> |
| ArgCollection(ArgCollection<a, b, c, d, e, f, g>& other) |
| { |
| gprSources = other.gprSources; |
| gprDestinations = other.gprDestinations; |
| fprSources = other.fprSources; |
| fprDestinations = other.fprDestinations; |
| crossSources = other.crossSources; |
| crossDestinations = other.crossDestinations; |
| } |
| |
| ArgCollection<numGPRArgs + 1, numGPRSources + 1, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> pushRegArg(GPRReg argument, GPRReg destination) |
| { |
| ArgCollection<numGPRArgs + 1, numGPRSources + 1, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> result(*this); |
| |
| result.gprSources[numGPRSources] = argument; |
| result.gprDestinations[numGPRSources] = destination; |
| return result; |
| } |
| |
| ArgCollection<numGPRArgs, numGPRSources, numFPRArgs + 1, numFPRSources + 1, numCrossSources, extraGPRArgs, extraPoke> pushRegArg(FPRReg argument, FPRReg destination) |
| { |
| ArgCollection<numGPRArgs, numGPRSources, numFPRArgs + 1, numFPRSources + 1, numCrossSources, extraGPRArgs, extraPoke> result(*this); |
| |
| result.fprSources[numFPRSources] = argument; |
| result.fprDestinations[numFPRSources] = destination; |
| return result; |
| } |
| |
| ArgCollection<numGPRArgs, numGPRSources, numFPRArgs + 1, numFPRSources, numCrossSources + 1, extraGPRArgs, extraPoke> pushRegArg(FPRReg argument, GPRReg destination) |
| { |
| ArgCollection<numGPRArgs, numGPRSources, numFPRArgs + 1, numFPRSources, numCrossSources + 1, extraGPRArgs, extraPoke> result(*this); |
| |
| result.crossSources[numCrossSources] = argument; |
| result.crossDestinations[numCrossSources] = destination; |
| return result; |
| } |
| |
| ArgCollection<numGPRArgs, numGPRSources + 1, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs + 1, extraPoke> pushExtraRegArg(GPRReg argument, GPRReg destination) |
| { |
| ArgCollection<numGPRArgs, numGPRSources + 1, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs + 1, extraPoke> result(*this); |
| |
| result.gprSources[numGPRSources] = argument; |
| result.gprDestinations[numGPRSources] = destination; |
| return result; |
| } |
| |
| ArgCollection<numGPRArgs + 1, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> addGPRArg() |
| { |
| return ArgCollection<numGPRArgs + 1, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke>(*this); |
| } |
| |
| ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs + 1, extraPoke> addGPRExtraArg() |
| { |
| return ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs + 1, extraPoke>(*this); |
| } |
| |
| ArgCollection<numGPRArgs + 1, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> addStackArg(GPRReg) |
| { |
| return ArgCollection<numGPRArgs + 1, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke>(*this); |
| } |
| |
| ArgCollection<numGPRArgs, numGPRSources, numFPRArgs + 1, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> addStackArg(FPRReg) |
| { |
| return ArgCollection<numGPRArgs, numGPRSources, numFPRArgs + 1, numFPRSources, numCrossSources, extraGPRArgs, extraPoke>(*this); |
| } |
| |
| ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke + 1> addPoke() |
| { |
| return ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke + 1>(*this); |
| } |
| |
| #if OS(WINDOWS) && CPU(X86_64) |
| unsigned argCount(GPRReg) { return numGPRArgs + numFPRArgs; } |
| unsigned argCount(FPRReg) { return numGPRArgs + numFPRArgs; } |
| #else |
| unsigned argCount(GPRReg) { return numGPRArgs + extraGPRArgs; } |
| unsigned argCount(FPRReg) { return numFPRArgs; } |
| #endif |
| |
| // store GPR -> GPR assignments |
| std::array<GPRReg, GPRInfo::numberOfRegisters> gprSources; |
| std::array<GPRReg, GPRInfo::numberOfRegisters> gprDestinations; |
| |
| // store FPR -> FPR assignments |
| std::array<FPRReg, FPRInfo::numberOfRegisters> fprSources; |
| std::array<FPRReg, FPRInfo::numberOfRegisters> fprDestinations; |
| |
| // store FPR -> GPR assignments |
| std::array<FPRReg, GPRInfo::numberOfRegisters> crossSources; |
| std::array<GPRReg, GPRInfo::numberOfRegisters> crossDestinations; |
| }; |
| |
| template<unsigned TargetSize, typename RegType> |
| std::array<RegType, TargetSize> clampArrayToSize(std::array<RegType, InfoTypeForReg<RegType>::numberOfRegisters> sourceArray) |
| { |
| static_assert(TargetSize <= sourceArray.size(), "TargetSize is bigger than source.size()"); |
| RELEASE_ASSERT(TargetSize <= InfoTypeForReg<RegType>::numberOfRegisters); |
| |
| std::array<RegType, TargetSize> result { }; |
| |
| // if constexpr avoids warnings when TargetSize is 0. |
| if constexpr (TargetSize > 0) { |
| for (unsigned i = 0; i < TargetSize; i++) { |
| ASSERT(sourceArray[i] != static_cast<int32_t>(InfoTypeForReg<RegType>::InvalidIndex)); |
| result[i] = sourceArray[i]; |
| } |
| } |
| |
| return result; |
| } |
| |
| ALWAYS_INLINE unsigned calculatePokeOffset(unsigned currentGPRArgument, unsigned currentFPRArgument, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke) |
| { |
| // Clang claims that it cannot find the symbol for FPRReg/GPRReg::numberOfArgumentRegisters when they are passed directly to std::max... seems like a bug |
| unsigned numberOfFPArgumentRegisters = FPRInfo::numberOfArgumentRegisters; |
| unsigned numberOfGPArgumentRegisters = GPRInfo::numberOfArgumentRegisters; |
| |
| currentGPRArgument += extraGPRArgs; |
| currentFPRArgument -= numCrossSources; |
| IGNORE_WARNINGS_BEGIN("type-limits") |
| ASSERT(currentGPRArgument >= GPRInfo::numberOfArgumentRegisters || currentFPRArgument >= FPRInfo::numberOfArgumentRegisters); |
| IGNORE_WARNINGS_END |
| |
| unsigned pokeOffset = POKE_ARGUMENT_OFFSET + extraPoke; |
| pokeOffset += std::max(currentGPRArgument, numberOfGPArgumentRegisters) - numberOfGPArgumentRegisters; |
| pokeOffset += std::max(currentFPRArgument, numberOfFPArgumentRegisters) - numberOfFPArgumentRegisters; |
| return pokeOffset; |
| } |
| |
| template<typename ArgType> |
| ALWAYS_INLINE void pokeForArgument(ArgType arg, unsigned currentGPRArgument, unsigned currentFPRArgument, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke) |
| { |
| unsigned pokeOffset = calculatePokeOffset(currentGPRArgument, currentFPRArgument, numCrossSources, extraGPRArgs, extraPoke); |
| poke(arg, pokeOffset); |
| } |
| |
| ALWAYS_INLINE bool stackAligned(unsigned currentGPRArgument, unsigned currentFPRArgument, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke) |
| { |
| unsigned pokeOffset = calculatePokeOffset(currentGPRArgument, currentFPRArgument, numCrossSources, extraGPRArgs, extraPoke); |
| return !(pokeOffset & 1); |
| } |
| |
| // In the auto-calling convention code below the order of operations is: |
| // 1) spill arguments to stack slots |
| // 2) shuffle incomming argument values in registers to argument registers |
| // 3) fill immediate values to argument registers |
| // To do this, we recurse forwards through our args collecting argument values in registers and spilling stack slots. |
| // when we run out of args we then run our shuffling code to relocate registers. Finally, as we unwind from our |
| // recursion we can fill immediates. |
| |
| #define CURRENT_ARGUMENT_TYPE typename FunctionTraits<OperationType>::template ArgumentType<numGPRArgs + numFPRArgs> |
| #define RESULT_TYPE typename FunctionTraits<OperationType>::ResultType |
| |
| #if USE(JSVALUE64) |
| |
| // Avoid MSVC optimization time explosion associated with __forceinline in recursive templates. |
| template<typename OperationType, unsigned numGPRArgs, unsigned numGPRSources, unsigned numFPRArgs, unsigned numFPRSources, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke, typename RegType, typename... Args> |
| ALWAYS_INLINE_EXCEPT_MSVC void marshallArgumentRegister(ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> argSourceRegs, RegType arg, Args... args) |
| { |
| using InfoType = InfoTypeForReg<RegType>; |
| unsigned numArgRegisters = InfoType::numberOfArgumentRegisters; |
| #if OS(WINDOWS) && CPU(X86_64) |
| unsigned currentArgCount = argSourceRegs.argCount(arg) + (std::is_same<RESULT_TYPE, SlowPathReturnType>::value ? 1 : 0); |
| #else |
| unsigned currentArgCount = argSourceRegs.argCount(arg); |
| #endif |
| if (currentArgCount < numArgRegisters) { |
| auto updatedArgSourceRegs = argSourceRegs.pushRegArg(arg, InfoType::toArgumentRegister(currentArgCount)); |
| setupArgumentsImpl<OperationType>(updatedArgSourceRegs, args...); |
| return; |
| } |
| |
| pokeForArgument(arg, numGPRArgs, numFPRArgs, numCrossSources, extraGPRArgs, extraPoke); |
| setupArgumentsImpl<OperationType>(argSourceRegs.addStackArg(arg), args...); |
| } |
| |
| template<typename OperationType, unsigned numGPRArgs, unsigned numGPRSources, unsigned numFPRArgs, unsigned numFPRSources, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke, typename... Args> |
| ALWAYS_INLINE void setupArgumentsImpl(ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> argSourceRegs, FPRReg arg, Args... args) |
| { |
| static_assert(std::is_same<CURRENT_ARGUMENT_TYPE, double>::value, "We should only be passing FPRRegs to a double"); |
| marshallArgumentRegister<OperationType>(argSourceRegs, arg, args...); |
| } |
| |
| template<typename OperationType, unsigned numGPRArgs, unsigned numGPRSources, unsigned numFPRArgs, unsigned numFPRSources, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke, typename... Args> |
| ALWAYS_INLINE void setupArgumentsImpl(ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> argSourceRegs, GPRReg arg, Args... args) |
| { |
| marshallArgumentRegister<OperationType>(argSourceRegs, arg, args...); |
| } |
| |
| template<typename OperationType, unsigned numGPRArgs, unsigned numGPRSources, unsigned numFPRArgs, unsigned numFPRSources, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke, typename... Args> |
| ALWAYS_INLINE void setupArgumentsImpl(ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> argSourceRegs, JSValueRegs arg, Args... args) |
| { |
| marshallArgumentRegister<OperationType>(argSourceRegs, arg.gpr(), args...); |
| } |
| |
| template<typename OperationType, unsigned numGPRArgs, unsigned numGPRSources, unsigned numFPRArgs, unsigned numFPRSources, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke, typename... Args> |
| ALWAYS_INLINE void setupArgumentsImpl(ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> argSourceRegs, CellValue arg, Args... args) |
| { |
| marshallArgumentRegister<OperationType>(argSourceRegs, arg.gpr(), args...); |
| } |
| |
| #else // USE(JSVALUE64) |
| #if CPU(ARM_THUMB2) || CPU(MIPS) |
| |
| template<typename OperationType, unsigned numGPRArgs, unsigned numGPRSources, unsigned numFPRArgs, unsigned numFPRSources, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke, typename... Args> |
| void setupArgumentsImpl(ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> argSourceRegs, FPRReg arg, Args... args) |
| { |
| static_assert(std::is_same<CURRENT_ARGUMENT_TYPE, double>::value, "We should only be passing FPRRegs to a double"); |
| |
| // MIPS and ARM-hardfp pass FP arguments in FP registers. |
| #if CPU(MIPS) |
| unsigned numberOfFPArgumentRegisters = FPRInfo::numberOfArgumentRegisters; |
| unsigned currentFPArgCount = argSourceRegs.argCount(arg); |
| |
| // MIPS can only use FP argument registers if it isn't preceeded by any GP argument. |
| if (currentFPArgCount < numberOfFPArgumentRegisters && !numGPRArgs) { |
| auto updatedArgSourceRegs = argSourceRegs.pushRegArg(arg, FPRInfo::toArgumentRegister(currentFPArgCount)); |
| setupArgumentsImpl<OperationType>(updatedArgSourceRegs.addGPRExtraArg().addGPRExtraArg(), args...); |
| return; |
| } |
| #elif CPU(ARM_THUMB2) && CPU(ARM_HARDFP) |
| unsigned numberOfFPArgumentRegisters = FPRInfo::numberOfArgumentRegisters; |
| unsigned currentFPArgCount = argSourceRegs.argCount(arg); |
| |
| if (currentFPArgCount < numberOfFPArgumentRegisters) { |
| auto updatedArgSourceRegs = argSourceRegs.pushRegArg(arg, FPRInfo::toArgumentRegister(currentFPArgCount)); |
| setupArgumentsImpl<OperationType>(updatedArgSourceRegs, args...); |
| return; |
| } |
| #endif |
| |
| #if CPU(MIPS) || (CPU(ARM_THUMB2) && !CPU(ARM_HARDFP)) |
| // On MIPS and ARM-softfp FP arguments can be passed in GP registers. |
| unsigned numberOfGPArgumentRegisters = GPRInfo::numberOfArgumentRegisters; |
| unsigned currentGPArgCount = argSourceRegs.argCount(GPRInfo::regT0); |
| unsigned alignedGPArgCount = roundUpToMultipleOf<2>(currentGPArgCount); |
| |
| if (alignedGPArgCount + 1 < numberOfGPArgumentRegisters) { |
| auto updatedArgSourceRegs = argSourceRegs.pushRegArg(arg, GPRInfo::toArgumentRegister(alignedGPArgCount)); |
| |
| if (alignedGPArgCount > currentGPArgCount) |
| setupArgumentsImpl<OperationType>(updatedArgSourceRegs.addGPRExtraArg().addGPRExtraArg().addGPRExtraArg(), args...); |
| else |
| setupArgumentsImpl<OperationType>(updatedArgSourceRegs.addGPRExtraArg().addGPRExtraArg(), args...); |
| |
| return; |
| } |
| |
| if (currentGPArgCount < numberOfGPArgumentRegisters) { |
| pokeForArgument(arg, numGPRArgs, numFPRArgs, numCrossSources, extraGPRArgs + 1, extraPoke); |
| setupArgumentsImpl<OperationType>(argSourceRegs.addGPRExtraArg().addStackArg(arg).addPoke(), args...); |
| return; |
| } |
| #endif |
| |
| // Otherwise pass FP argument on stack. |
| if (stackAligned(numGPRArgs, numFPRArgs, numCrossSources, extraGPRArgs, extraPoke)) { |
| pokeForArgument(arg, numGPRArgs, numFPRArgs, numCrossSources, extraGPRArgs, extraPoke); |
| setupArgumentsImpl<OperationType>(argSourceRegs.addStackArg(arg).addPoke(), args...); |
| } else { |
| pokeForArgument(arg, numGPRArgs, numFPRArgs, numCrossSources, extraGPRArgs, extraPoke + 1); |
| setupArgumentsImpl<OperationType>(argSourceRegs.addStackArg(arg).addPoke().addPoke(), args...); |
| } |
| } |
| |
| template<typename OperationType, unsigned numGPRArgs, unsigned numGPRSources, unsigned numFPRArgs, unsigned numFPRSources, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke, typename... Args> |
| std::enable_if_t<sizeof(CURRENT_ARGUMENT_TYPE) <= 4> |
| setupArgumentsImpl(ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> argSourceRegs, GPRReg arg, Args... args) |
| { |
| unsigned numArgRegisters = GPRInfo::numberOfArgumentRegisters; |
| unsigned currentArgCount = argSourceRegs.argCount(arg); |
| if (currentArgCount < numArgRegisters) { |
| auto updatedArgSourceRegs = argSourceRegs.pushRegArg(arg, GPRInfo::toArgumentRegister(currentArgCount)); |
| setupArgumentsImpl<OperationType>(updatedArgSourceRegs, args...); |
| return; |
| } |
| |
| pokeForArgument(arg, numGPRArgs, numFPRArgs, numCrossSources, extraGPRArgs, extraPoke); |
| setupArgumentsImpl<OperationType>(argSourceRegs.addStackArg(arg), args...); |
| } |
| |
| template<typename OperationType, typename Arg1, typename Arg2, unsigned numGPRArgs, unsigned numGPRSources, unsigned numFPRArgs, unsigned numFPRSources, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke, typename... Args> |
| void pokeArgumentsAligned(ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> argSourceRegs, Arg1 arg1, Arg2 arg2, Args... args) |
| { |
| unsigned numArgRegisters = GPRInfo::numberOfArgumentRegisters; |
| unsigned currentArgCount = argSourceRegs.argCount(GPRInfo::regT0); |
| |
| if (currentArgCount + 1 == numArgRegisters) { |
| pokeForArgument(arg1, numGPRArgs, numFPRArgs, numCrossSources, extraGPRArgs + 1, extraPoke); |
| pokeForArgument(arg2, numGPRArgs, numFPRArgs, numCrossSources, extraGPRArgs + 1, extraPoke + 1); |
| setupArgumentsImpl<OperationType>(argSourceRegs.addGPRExtraArg().addGPRArg().addPoke(), args...); |
| } else if (stackAligned(numGPRArgs, numFPRArgs, numCrossSources, extraGPRArgs, extraPoke)) { |
| pokeForArgument(arg1, numGPRArgs, numFPRArgs, numCrossSources, extraGPRArgs, extraPoke); |
| pokeForArgument(arg2, numGPRArgs, numFPRArgs, numCrossSources, extraGPRArgs, extraPoke + 1); |
| setupArgumentsImpl<OperationType>(argSourceRegs.addGPRArg().addPoke(), args...); |
| } else { |
| pokeForArgument(arg1, numGPRArgs, numFPRArgs, numCrossSources, extraGPRArgs, extraPoke + 1); |
| pokeForArgument(arg2, numGPRArgs, numFPRArgs, numCrossSources, extraGPRArgs, extraPoke + 2); |
| setupArgumentsImpl<OperationType>(argSourceRegs.addGPRArg().addPoke().addPoke(), args...); |
| } |
| } |
| |
| template<typename OperationType, unsigned numGPRArgs, unsigned numGPRSources, unsigned numFPRArgs, unsigned numFPRSources, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke, typename... Args> |
| std::enable_if_t<std::is_same<CURRENT_ARGUMENT_TYPE, EncodedJSValue>::value> |
| setupArgumentsImpl(ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> argSourceRegs, CellValue payload, Args... args) |
| { |
| unsigned numArgRegisters = GPRInfo::numberOfArgumentRegisters; |
| unsigned currentArgCount = argSourceRegs.argCount(payload.gpr()); |
| unsigned alignedArgCount = roundUpToMultipleOf<2>(currentArgCount); |
| |
| if (alignedArgCount + 1 < numArgRegisters) { |
| auto updatedArgSourceRegs = argSourceRegs.pushRegArg(payload.gpr(), GPRInfo::toArgumentRegister(alignedArgCount)); |
| |
| if (alignedArgCount > currentArgCount) |
| setupArgumentsImpl<OperationType>(updatedArgSourceRegs.addGPRExtraArg().addGPRExtraArg(), args...); |
| else |
| setupArgumentsImpl<OperationType>(updatedArgSourceRegs.addGPRExtraArg(), args...); |
| |
| move(TrustedImm32(JSValue::CellTag), GPRInfo::toArgumentRegister(alignedArgCount + 1)); |
| |
| } else |
| pokeArgumentsAligned<OperationType>(argSourceRegs, payload.gpr(), TrustedImm32(JSValue::CellTag), args...); |
| } |
| |
| template<typename OperationType, unsigned numGPRArgs, unsigned numGPRSources, unsigned numFPRArgs, unsigned numFPRSources, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke, typename... Args> |
| std::enable_if_t<std::is_same<CURRENT_ARGUMENT_TYPE, EncodedJSValue>::value> |
| setupArgumentsImpl(ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> argSourceRegs, JSValueRegs arg, Args... args) |
| { |
| unsigned numArgRegisters = GPRInfo::numberOfArgumentRegisters; |
| unsigned currentArgCount = argSourceRegs.argCount(arg.tagGPR()); |
| unsigned alignedArgCount = roundUpToMultipleOf<2>(currentArgCount); |
| |
| if (alignedArgCount + 1 < numArgRegisters) { |
| // JSValueRegs is passed in two 32-bit registers on these architectures. Increase both numGPRArgs and extraGPRArgs by 1. |
| // We can't just add 2 to numGPRArgs, since it is used for CURRENT_ARGUMENT_TYPE. Adding 2 would lead to a skipped argument. |
| auto updatedArgSourceRegs1 = argSourceRegs.pushRegArg(arg.payloadGPR(), GPRInfo::toArgumentRegister(alignedArgCount)); |
| auto updatedArgSourceRegs2 = updatedArgSourceRegs1.pushExtraRegArg(arg.tagGPR(), GPRInfo::toArgumentRegister(alignedArgCount + 1)); |
| |
| if (alignedArgCount > currentArgCount) |
| setupArgumentsImpl<OperationType>(updatedArgSourceRegs2.addGPRExtraArg(), args...); |
| else |
| setupArgumentsImpl<OperationType>(updatedArgSourceRegs2, args...); |
| } else |
| pokeArgumentsAligned<OperationType>(argSourceRegs, arg.payloadGPR(), arg.tagGPR(), args...); |
| } |
| |
| #endif // CPU(ARM_THUMB2) || CPU(MIPS) |
| #endif // USE(JSVALUE64) |
| |
| template<typename OperationType, unsigned numGPRArgs, unsigned numGPRSources, unsigned numFPRArgs, unsigned numFPRSources, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke, typename Arg, typename... Args> |
| ALWAYS_INLINE std::enable_if_t< |
| std::is_base_of<TrustedImm, Arg>::value |
| || std::is_convertible<Arg, TrustedImm>::value> // We have this since DFGSpeculativeJIT has it's own implementation of TrustedImmPtr |
| setupArgumentsImpl(ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> argSourceRegs, Arg arg, Args... args) |
| { |
| // Right now this only supports non-floating point immediate arguments since we never call operations with non-register values. |
| // If we ever needed to support immediate floating point arguments we would need to duplicate this logic for both types, which sounds |
| // gross so it's probably better to do that marshalling before the call operation... |
| static_assert(!std::is_floating_point<CURRENT_ARGUMENT_TYPE>::value, "We don't support immediate floats/doubles in setupArguments"); |
| auto numArgRegisters = GPRInfo::numberOfArgumentRegisters; |
| #if OS(WINDOWS) && CPU(X86_64) |
| auto currentArgCount = numGPRArgs + numFPRArgs + (std::is_same<RESULT_TYPE, SlowPathReturnType>::value ? 1 : 0); |
| #else |
| auto currentArgCount = numGPRArgs + extraGPRArgs; |
| #endif |
| if (currentArgCount < numArgRegisters) { |
| setupArgumentsImpl<OperationType>(argSourceRegs.addGPRArg(), args...); |
| move(arg, GPRInfo::toArgumentRegister(currentArgCount)); |
| return; |
| } |
| |
| pokeForArgument(arg, numGPRArgs, numFPRArgs, numCrossSources, extraGPRArgs, extraPoke); |
| setupArgumentsImpl<OperationType>(argSourceRegs.addGPRArg(), args...); |
| } |
| |
| template<typename OperationType, unsigned numGPRArgs, unsigned numGPRSources, unsigned numFPRArgs, unsigned numFPRSources, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke, typename Arg, typename... Args> |
| ALWAYS_INLINE std::enable_if_t< |
| std::is_same<CURRENT_ARGUMENT_TYPE, Arg>::value |
| && std::is_integral<CURRENT_ARGUMENT_TYPE>::value |
| && (sizeof(CURRENT_ARGUMENT_TYPE) <= 4)> |
| setupArgumentsImpl(ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> argSourceRegs, Arg arg, Args... args) |
| { |
| setupArgumentsImpl<OperationType>(argSourceRegs, TrustedImm32(arg), args...); |
| } |
| |
| template<typename OperationType, unsigned numGPRArgs, unsigned numGPRSources, unsigned numFPRArgs, unsigned numFPRSources, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke, typename Arg, typename... Args> |
| ALWAYS_INLINE std::enable_if_t< |
| std::is_same<CURRENT_ARGUMENT_TYPE, Arg>::value |
| && std::is_integral<CURRENT_ARGUMENT_TYPE>::value |
| && (sizeof(CURRENT_ARGUMENT_TYPE) == 8)> |
| setupArgumentsImpl(ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> argSourceRegs, Arg arg, Args... args) |
| { |
| setupArgumentsImpl<OperationType>(argSourceRegs, TrustedImm64(arg), args...); |
| } |
| |
| template<typename OperationType, unsigned numGPRArgs, unsigned numGPRSources, unsigned numFPRArgs, unsigned numFPRSources, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke, typename Arg, typename... Args> |
| ALWAYS_INLINE std::enable_if_t< |
| std::is_pointer<CURRENT_ARGUMENT_TYPE>::value |
| && ((std::is_pointer<Arg>::value && std::is_convertible<std::remove_const_t<std::remove_pointer_t<Arg>>*, CURRENT_ARGUMENT_TYPE>::value) |
| || std::is_same<Arg, std::nullptr_t>::value)> |
| setupArgumentsImpl(ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> argSourceRegs, Arg arg, Args... args) |
| { |
| setupArgumentsImpl<OperationType>(argSourceRegs, TrustedImmPtr(arg), args...); |
| } |
| |
| // Special case DFG::RegisteredStructure because it's really annoying to deal with otherwise... |
| template<typename OperationType, unsigned numGPRArgs, unsigned numGPRSources, unsigned numFPRArgs, unsigned numFPRSources, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke, typename Arg, typename... Args> |
| ALWAYS_INLINE std::enable_if_t< |
| std::is_same<CURRENT_ARGUMENT_TYPE, Structure*>::value |
| && std::is_same<Arg, DFG::RegisteredStructure>::value> |
| setupArgumentsImpl(ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> argSourceRegs, Arg arg, Args... args) |
| { |
| setupArgumentsImpl<OperationType>(argSourceRegs, TrustedImmPtr(arg.get()), args...); |
| } |
| |
| #undef CURRENT_ARGUMENT_TYPE |
| #undef RESULT_TYPE |
| |
| // Base case; set up the argument registers. |
| template<typename OperationType, unsigned numGPRArgs, unsigned numGPRSources, unsigned numFPRArgs, unsigned numFPRSources, unsigned numCrossSources, unsigned extraGPRArgs, unsigned extraPoke> |
| ALWAYS_INLINE void setupArgumentsImpl(ArgCollection<numGPRArgs, numGPRSources, numFPRArgs, numFPRSources, numCrossSources, extraGPRArgs, extraPoke> argSourceRegs) |
| { |
| static_assert(FunctionTraits<OperationType>::arity == numGPRArgs + numFPRArgs, "One last sanity check"); |
| #if USE(JSVALUE64) |
| static_assert(FunctionTraits<OperationType>::cCallArity() == numGPRArgs + numFPRArgs + extraPoke, "Check the CCall arity"); |
| #endif |
| setupStubArgs<numGPRSources, GPRReg>(clampArrayToSize<numGPRSources, GPRReg>(argSourceRegs.gprDestinations), clampArrayToSize<numGPRSources, GPRReg>(argSourceRegs.gprSources)); |
| #if CPU(MIPS) || (CPU(ARM_THUMB2) && !CPU(ARM_HARDFP)) |
| setupStubCrossArgs<numCrossSources>(argSourceRegs.crossDestinations, argSourceRegs.crossSources); |
| #else |
| static_assert(!numCrossSources, "shouldn't be used on this architecture."); |
| #endif |
| setupStubArgs<numFPRSources, FPRReg>(clampArrayToSize<numFPRSources, FPRReg>(argSourceRegs.fprDestinations), clampArrayToSize<numFPRSources, FPRReg>(argSourceRegs.fprSources)); |
| } |
| |
| public: |
| |
| #define FIRST_ARGUMENT_TYPE typename FunctionTraits<OperationType>::template ArgumentType<0> |
| |
| template<typename OperationType, typename... Args> |
| ALWAYS_INLINE std::enable_if_t<std::is_same<FIRST_ARGUMENT_TYPE, CallFrame*>::value> setupArguments(Args... args) |
| { |
| #if USE(JSVALUE64) |
| // This only really works for 64-bit since jsvalue regs mess things up for 32-bit... |
| static_assert(FunctionTraits<OperationType>::cCallArity() == sizeof...(Args) + 1, "Basic sanity check"); |
| #endif |
| setupArgumentsImpl<OperationType, 0, 0, 0, 0, 0, 0, 0>(ArgCollection<0, 0, 0, 0, 0, 0, 0>(), GPRInfo::callFrameRegister, args...); |
| } |
| |
| template<typename OperationType, typename... Args> |
| ALWAYS_INLINE std::enable_if_t<!std::is_same<FIRST_ARGUMENT_TYPE, CallFrame*>::value> setupArguments(Args... args) |
| { |
| #if USE(JSVALUE64) |
| // This only really works for 64-bit since jsvalue regs mess things up for 32-bit... |
| static_assert(FunctionTraits<OperationType>::cCallArity() == sizeof...(Args), "Basic sanity check"); |
| #endif |
| setupArgumentsImpl<OperationType, 0, 0, 0, 0, 0, 0, 0>(ArgCollection<0, 0, 0, 0, 0, 0, 0>(), args...); |
| } |
| |
| #undef FIRST_ARGUMENT_TYPE |
| |
| void setupResults(GPRReg destA, GPRReg destB) |
| { |
| GPRReg srcA = GPRInfo::returnValueGPR; |
| GPRReg srcB = GPRInfo::returnValueGPR2; |
| |
| if (destA == InvalidGPRReg) |
| move(srcB, destB); |
| else if (destB == InvalidGPRReg) |
| move(srcA, destA); |
| else if (srcB != destA) { |
| // Handle the easy cases - two simple moves. |
| move(srcA, destA); |
| move(srcB, destB); |
| } else if (srcA != destB) { |
| // Handle the non-swap case - just put srcB in place first. |
| move(srcB, destB); |
| move(srcA, destA); |
| } else |
| swap(destA, destB); |
| } |
| |
| void setupResults(JSValueRegs regs) |
| { |
| #if USE(JSVALUE64) |
| move(GPRInfo::returnValueGPR, regs.gpr()); |
| #else |
| setupResults(regs.payloadGPR(), regs.tagGPR()); |
| #endif |
| } |
| |
| void jumpToExceptionHandler(VM& vm) |
| { |
| // genericUnwind() leaves the handler CallFrame* in vm->callFrameForCatch, |
| // and the address of the handler in vm->targetMachinePCForThrow. |
| loadPtr(&vm.targetMachinePCForThrow, GPRInfo::regT1); |
| farJump(GPRInfo::regT1, ExceptionHandlerPtrTag); |
| } |
| |
| void prepareForTailCallSlow(GPRReg calleeGPR = InvalidGPRReg) |
| { |
| GPRReg temp1 = calleeGPR == GPRInfo::regT0 ? GPRInfo::regT3 : GPRInfo::regT0; |
| GPRReg temp2 = calleeGPR == GPRInfo::regT1 ? GPRInfo::regT3 : GPRInfo::regT1; |
| GPRReg temp3 = calleeGPR == GPRInfo::regT2 ? GPRInfo::regT3 : GPRInfo::regT2; |
| |
| GPRReg newFramePointer = temp1; |
| GPRReg newFrameSizeGPR = temp2; |
| { |
| // The old frame size is its number of arguments (or number of |
| // parameters in case of arity fixup), plus the frame header size, |
| // aligned |
| GPRReg oldFrameSizeGPR = temp2; |
| { |
| GPRReg argCountGPR = oldFrameSizeGPR; |
| load32(Address(framePointerRegister, CallFrameSlot::argumentCountIncludingThis * static_cast<int>(sizeof(Register)) + PayloadOffset), argCountGPR); |
| |
| { |
| GPRReg numParametersGPR = temp1; |
| { |
| GPRReg codeBlockGPR = numParametersGPR; |
| loadPtr(Address(framePointerRegister, CallFrameSlot::codeBlock * static_cast<int>(sizeof(Register))), codeBlockGPR); |
| load32(Address(codeBlockGPR, CodeBlock::offsetOfNumParameters()), numParametersGPR); |
| } |
| |
| ASSERT(numParametersGPR != argCountGPR); |
| Jump argumentCountWasNotFixedUp = branch32(BelowOrEqual, numParametersGPR, argCountGPR); |
| move(numParametersGPR, argCountGPR); |
| argumentCountWasNotFixedUp.link(this); |
| } |
| |
| add32(TrustedImm32(stackAlignmentRegisters() + CallFrame::headerSizeInRegisters - 1), argCountGPR, oldFrameSizeGPR); |
| and32(TrustedImm32(-stackAlignmentRegisters()), oldFrameSizeGPR); |
| // We assume < 2^28 arguments |
| mul32(TrustedImm32(sizeof(Register)), oldFrameSizeGPR, oldFrameSizeGPR); |
| } |
| |
| // The new frame pointer is at framePointer + oldFrameSize - newFrameSize |
| ASSERT(newFramePointer != oldFrameSizeGPR); |
| addPtr(framePointerRegister, oldFrameSizeGPR, newFramePointer); |
| |
| // The new frame size is just the number of arguments plus the |
| // frame header size, aligned |
| ASSERT(newFrameSizeGPR != newFramePointer); |
| load32(Address(stackPointerRegister, CallFrameSlot::argumentCountIncludingThis * static_cast<int>(sizeof(Register)) + PayloadOffset - sizeof(CallerFrameAndPC)), |
| newFrameSizeGPR); |
| add32(TrustedImm32(stackAlignmentRegisters() + CallFrame::headerSizeInRegisters - 1), newFrameSizeGPR); |
| and32(TrustedImm32(-stackAlignmentRegisters()), newFrameSizeGPR); |
| // We assume < 2^28 arguments |
| mul32(TrustedImm32(sizeof(Register)), newFrameSizeGPR, newFrameSizeGPR); |
| } |
| |
| GPRReg tempGPR = temp3; |
| ASSERT(tempGPR != newFramePointer && tempGPR != newFrameSizeGPR); |
| |
| // We don't need the current frame beyond this point. Masquerade as our |
| // caller. |
| #if CPU(ARM_THUMB2) || CPU(ARM64) |
| loadPtr(Address(framePointerRegister, CallFrame::returnPCOffset()), linkRegister); |
| subPtr(TrustedImm32(2 * sizeof(void*)), newFrameSizeGPR); |
| #if CPU(ARM64E) |
| addPtr(TrustedImm32(sizeof(CallerFrameAndPC)), MacroAssembler::framePointerRegister, tempGPR); |
| untagPtr(tempGPR, linkRegister); |
| #endif |
| #elif CPU(MIPS) |
| loadPtr(Address(framePointerRegister, sizeof(void*)), returnAddressRegister); |
| subPtr(TrustedImm32(2 * sizeof(void*)), newFrameSizeGPR); |
| #elif CPU(X86_64) |
| loadPtr(Address(framePointerRegister, sizeof(void*)), tempGPR); |
| push(tempGPR); |
| subPtr(TrustedImm32(sizeof(void*)), newFrameSizeGPR); |
| #else |
| UNREACHABLE_FOR_PLATFORM(); |
| #endif |
| subPtr(newFrameSizeGPR, newFramePointer); |
| loadPtr(Address(framePointerRegister), framePointerRegister); |
| |
| |
| // We need to move the newFrameSizeGPR slots above the stack pointer by |
| // newFramePointer registers. We use pointer-sized chunks. |
| MacroAssembler::Label copyLoop(label()); |
| |
| subPtr(TrustedImm32(sizeof(void*)), newFrameSizeGPR); |
| loadPtr(BaseIndex(stackPointerRegister, newFrameSizeGPR, TimesOne), tempGPR); |
| storePtr(tempGPR, BaseIndex(newFramePointer, newFrameSizeGPR, TimesOne)); |
| |
| branchTest32(MacroAssembler::NonZero, newFrameSizeGPR).linkTo(copyLoop, this); |
| |
| // Ready for a jump! |
| move(newFramePointer, stackPointerRegister); |
| } |
| |
| // These operations clobber all volatile registers. They assume that there is room on the top of |
| // stack to marshall call arguments. |
| void logShadowChickenProloguePacket(GPRReg shadowPacket, GPRReg scratch1, GPRReg scope); |
| void logShadowChickenTailPacket(GPRReg shadowPacket, JSValueRegs thisRegs, GPRReg scope, CodeBlock*, CallSiteIndex); |
| // Leaves behind a pointer to the Packet we should write to in shadowPacket. |
| void ensureShadowChickenPacket(VM&, GPRReg shadowPacket, GPRReg scratch1NonArgGPR, GPRReg scratch2); |
| }; |
| |
| } // namespace JSC |
| |
| #endif // ENABLE(JIT) |
