// This file is part of AsmJit project // // See asmjit.h or LICENSE.md for license and copyright information // SPDX-License-Identifier: Zlib #ifndef ASMJIT_CORE_FUNC_H_INCLUDED #define ASMJIT_CORE_FUNC_H_INCLUDED #include "../core/archtraits.h" #include "../core/environment.h" #include "../core/operand.h" #include "../core/type.h" #include "../core/support.h" ASMJIT_BEGIN_NAMESPACE //! \addtogroup asmjit_function //! \{ //! Calling convention id. //! //! Calling conventions can be divided into the following groups: //! //! - Universal - calling conventions are applicable to any target. They will be converted to a target dependent //! calling convention at runtime by \ref CallConv::init() with some help from \ref Environment. The purpose of //! these calling conventions is to make using functions less target dependent and closer to C and C++. //! //! - Target specific - calling conventions that are used by a particular architecture and ABI. For example //! Windows 64-bit calling convention and AMD64 SystemV calling convention. enum class CallConvId : uint8_t { //! None or invalid (can't be used). kNone = 0, // Universal Calling Conventions // ----------------------------- //! Standard function call or explicit `__cdecl` where it can be specified. //! //! This is a universal calling convention, which is used to initialize specific calling connventions based on //! architecture, platform, and its ABI. kCDecl = 1, //! `__stdcall` on targets that support this calling convention (X86). //! //! \note This calling convention is only supported on 32-bit X86. If used on environment that doesn't support //! this calling convention it will be replaced by \ref CallConvId::kCDecl. kStdCall = 2, //! `__fastcall` on targets that support this calling convention (X86). //! //! \note This calling convention is only supported on 32-bit X86. If used on environment that doesn't support //! this calling convention it will be replaced by \ref CallConvId::kCDecl. kFastCall = 3, //! `__vectorcall` on targets that support this calling convention (X86/X64). //! //! \note This calling convention is only supported on 32-bit and 64-bit X86 architecture on Windows platform. //! If used on environment that doesn't support this calling it will be replaced by \ref CallConvId::kCDecl. kVectorCall = 4, //! `__thiscall` on targets that support this calling convention (X86). //! //! \note This calling convention is only supported on 32-bit X86 Windows platform. If used on environment that //! doesn't support this calling convention it will be replaced by \ref CallConvId::kCDecl. kThisCall = 5, //! `__attribute__((regparm(1)))` convention (GCC and Clang). kRegParm1 = 6, //! `__attribute__((regparm(2)))` convention (GCC and Clang). kRegParm2 = 7, //! `__attribute__((regparm(3)))` convention (GCC and Clang). kRegParm3 = 8, //! Soft-float calling convention (ARM). //! //! Floating point arguments are passed via general purpose registers. kSoftFloat = 9, //! Hard-float calling convention (ARM). //! //! Floating point arguments are passed via SIMD registers. kHardFloat = 10, //! AsmJit specific calling convention designed for calling functions inside a multimedia code that don't use many //! registers internally, but are long enough to be called and not inlined. These functions are usually used to //! calculate trigonometric functions, logarithms, etc... kLightCall2 = 16, kLightCall3 = 17, kLightCall4 = 18, // ABI-Specific Calling Conventions // -------------------------------- //! X64 System-V calling convention. kX64SystemV = 32, //! X64 Windows calling convention. kX64Windows = 33, //! Maximum value of `CallConvId`. kMaxValue = kX64Windows, // Host Calling Conventions // ------------------------ //! Host calling convention detected at compile-time. kHost = #if defined(_DOXYGEN) DETECTED_AT_COMPILE_TIME #elif ASMJIT_ARCH_ARM == 32 && defined(__SOFTFP__) kSoftFloat #elif ASMJIT_ARCH_ARM == 32 && !defined(__SOFTFP__) kHardFloat #else kCDecl #endif }; //! Strategy used by calling conventions to assign registers to function arguments. //! //! Calling convention strategy describes how AsmJit should convert function arguments used by \ref FuncSignature //! into register identifiers and stack offsets. The \ref CallConvStrategy::kDefault strategy assigns registers //! and then stack whereas \ref CallConvStrategy::kX64Windows strategy does register shadowing as defined by WIN64 //! calling convention, which is only used by 64-bit Windows. enum class CallConvStrategy : uint8_t { //! Default register assignment strategy. kDefault = 0, //! Windows 64-bit ABI register assignment strategy. kX64Windows = 1, //! Windows 64-bit __vectorcall register assignment strategy. kX64VectorCall = 2, //! Maximum value of `CallConvStrategy`. kMaxValue = kX64VectorCall }; //! Calling convention flags. enum class CallConvFlags : uint32_t { //! No flags. kNone = 0, //! Callee is responsible for cleaning up the stack. kCalleePopsStack = 0x0001u, //! Pass vector arguments indirectly (as a pointer). kIndirectVecArgs = 0x0002u, //! Pass F32 and F64 arguments via VEC128 register. kPassFloatsByVec = 0x0004u, //! Pass MMX and vector arguments via stack if the function has variable arguments. kPassVecByStackIfVA = 0x0008u, //! MMX registers are passed and returned via GP registers. kPassMmxByGp = 0x0010u, //! MMX registers are passed and returned via XMM registers. kPassMmxByXmm = 0x0020u, //! Calling convention can be used with variable arguments. kVarArgCompatible = 0x0080u }; ASMJIT_DEFINE_ENUM_FLAGS(CallConvFlags) //! Function calling convention. //! //! Function calling convention is a scheme that defines how function parameters are passed and how function //! returns its result. AsmJit defines a variety of architecture and OS specific calling conventions and also //! provides a compile time detection to make the code-generation easier. struct CallConv { //! \name Constants //! \{ enum : uint32_t { //! Maximum number of register arguments per register group. //! //! \note This is not really AsmJit's limitatation, it's just the number that makes sense considering all common //! calling conventions. Usually even conventions that use registers to pass function arguments are limited to 8 //! and less arguments passed via registers per group. kMaxRegArgsPerGroup = 16 }; //! \} //! \name Members //! \{ //! Target architecture. Arch _arch; //! Calling convention id. CallConvId _id; //! Register assignment strategy. CallConvStrategy _strategy; //! Red zone size (AMD64 == 128 bytes). uint8_t _redZoneSize; //! Spill zone size (WIN-X64 == 32 bytes). uint8_t _spillZoneSize; //! Natural stack alignment as defined by OS/ABI. uint8_t _naturalStackAlignment; //! Calling convention flags. CallConvFlags _flags; //! Size to save/restore per register group. Support::Array _saveRestoreRegSize; //! Alignment of save/restore groups. Support::Array _saveRestoreAlignment; //! Mask of all passed registers, per group. Support::Array _passedRegs; //! Mask of all preserved registers, per group. Support::Array _preservedRegs; //! Passed registers' order. union RegOrder { //! Passed registers, ordered. uint8_t id[kMaxRegArgsPerGroup]; //! Packed IDs in `uint32_t` array. uint32_t packed[(kMaxRegArgsPerGroup + 3) / 4]; }; //! Passed registers' order, per register group. Support::Array _passedOrder; //! \} //! \name Construction & Destruction //! \{ //! Initializes this calling convention to the given `ccId` based on the `environment`. //! //! See \ref CallConvId and \ref Environment for more details. ASMJIT_API Error init(CallConvId ccId, const Environment& environment) noexcept; //! Resets this CallConv struct into a defined state. //! //! It's recommended to reset the \ref CallConv struct in case you would like create a custom calling convention //! as it prevents from using an uninitialized data (CallConv doesn't have a constructor that would initialize it, //! it's just a struct). inline void reset() noexcept { memset(this, 0, sizeof(*this)); memset(_passedOrder.data(), 0xFF, sizeof(_passedOrder)); } //! \} //! \name Accessors //! \{ //! Returns the target architecture of this calling convention. inline Arch arch() const noexcept { return _arch; } //! Sets the target architecture of this calling convention. inline void setArch(Arch arch) noexcept { _arch = arch; } //! Returns the calling convention id. inline CallConvId id() const noexcept { return _id; } //! Sets the calling convention id. inline void setId(CallConvId ccId) noexcept { _id = ccId; } //! Returns the strategy used to assign registers to arguments. inline CallConvStrategy strategy() const noexcept { return _strategy; } //! Sets the strategy used to assign registers to arguments. inline void setStrategy(CallConvStrategy ccStrategy) noexcept { _strategy = ccStrategy; } //! Tests whether the calling convention has the given `flag` set. inline bool hasFlag(CallConvFlags flag) const noexcept { return Support::test(_flags, flag); } //! Returns the calling convention flags, see `Flags`. inline CallConvFlags flags() const noexcept { return _flags; } //! Adds the calling convention flags, see `Flags`. inline void setFlags(CallConvFlags flag) noexcept { _flags = flag; }; //! Adds the calling convention flags, see `Flags`. inline void addFlags(CallConvFlags flags) noexcept { _flags |= flags; }; //! Tests whether this calling convention specifies 'RedZone'. inline bool hasRedZone() const noexcept { return _redZoneSize != 0; } //! Tests whether this calling convention specifies 'SpillZone'. inline bool hasSpillZone() const noexcept { return _spillZoneSize != 0; } //! Returns size of 'RedZone'. inline uint32_t redZoneSize() const noexcept { return _redZoneSize; } //! Returns size of 'SpillZone'. inline uint32_t spillZoneSize() const noexcept { return _spillZoneSize; } //! Sets size of 'RedZone'. inline void setRedZoneSize(uint32_t size) noexcept { _redZoneSize = uint8_t(size); } //! Sets size of 'SpillZone'. inline void setSpillZoneSize(uint32_t size) noexcept { _spillZoneSize = uint8_t(size); } //! Returns a natural stack alignment. inline uint32_t naturalStackAlignment() const noexcept { return _naturalStackAlignment; } //! Sets a natural stack alignment. //! //! This function can be used to override the default stack alignment in case that you know that it's alignment is //! different. For example it allows to implement custom calling conventions that guarantee higher stack alignment. inline void setNaturalStackAlignment(uint32_t value) noexcept { _naturalStackAlignment = uint8_t(value); } //! Returns the size of a register (or its part) to be saved and restored of the given `group`. inline uint32_t saveRestoreRegSize(RegGroup group) const noexcept { return _saveRestoreRegSize[group]; } //! Sets the size of a vector register (or its part) to be saved and restored. inline void setSaveRestoreRegSize(RegGroup group, uint32_t size) noexcept { _saveRestoreRegSize[group] = uint8_t(size); } //! Returns the alignment of a save-restore area of the given `group`. inline uint32_t saveRestoreAlignment(RegGroup group) const noexcept { return _saveRestoreAlignment[group]; } //! Sets the alignment of a save-restore area of the given `group`. inline void setSaveRestoreAlignment(RegGroup group, uint32_t alignment) noexcept { _saveRestoreAlignment[group] = uint8_t(alignment); } //! Returns the order of passed registers of the given `group`. inline const uint8_t* passedOrder(RegGroup group) const noexcept { ASMJIT_ASSERT(group <= RegGroup::kMaxVirt); return _passedOrder[size_t(group)].id; } //! Returns the mask of passed registers of the given `group`. inline RegMask passedRegs(RegGroup group) const noexcept { ASMJIT_ASSERT(group <= RegGroup::kMaxVirt); return _passedRegs[size_t(group)]; } inline void _setPassedPacked(RegGroup group, uint32_t p0, uint32_t p1, uint32_t p2, uint32_t p3) noexcept { ASMJIT_ASSERT(group <= RegGroup::kMaxVirt); _passedOrder[group].packed[0] = p0; _passedOrder[group].packed[1] = p1; _passedOrder[group].packed[2] = p2; _passedOrder[group].packed[3] = p3; } //! Resets the order and mask of passed registers. inline void setPassedToNone(RegGroup group) noexcept { ASMJIT_ASSERT(group <= RegGroup::kMaxVirt); _setPassedPacked(group, 0xFFFFFFFFu, 0xFFFFFFFFu, 0xFFFFFFFFu, 0xFFFFFFFFu); _passedRegs[size_t(group)] = 0u; } //! Sets the order and mask of passed registers. inline void setPassedOrder(RegGroup group, uint32_t a0, uint32_t a1 = 0xFF, uint32_t a2 = 0xFF, uint32_t a3 = 0xFF, uint32_t a4 = 0xFF, uint32_t a5 = 0xFF, uint32_t a6 = 0xFF, uint32_t a7 = 0xFF) noexcept { ASMJIT_ASSERT(group <= RegGroup::kMaxVirt); // NOTE: This should always be called with all arguments known at compile time, so even if it looks scary it // should be translated into few instructions. _setPassedPacked(group, Support::bytepack32_4x8(a0, a1, a2, a3), Support::bytepack32_4x8(a4, a5, a6, a7), 0xFFFFFFFFu, 0xFFFFFFFFu); _passedRegs[group] = (a0 != 0xFF ? 1u << a0 : 0u) | (a1 != 0xFF ? 1u << a1 : 0u) | (a2 != 0xFF ? 1u << a2 : 0u) | (a3 != 0xFF ? 1u << a3 : 0u) | (a4 != 0xFF ? 1u << a4 : 0u) | (a5 != 0xFF ? 1u << a5 : 0u) | (a6 != 0xFF ? 1u << a6 : 0u) | (a7 != 0xFF ? 1u << a7 : 0u) ; } //! Returns preserved register mask of the given `group`. inline RegMask preservedRegs(RegGroup group) const noexcept { ASMJIT_ASSERT(group <= RegGroup::kMaxVirt); return _preservedRegs[group]; } //! Sets preserved register mask of the given `group`. inline void setPreservedRegs(RegGroup group, RegMask regs) noexcept { ASMJIT_ASSERT(group <= RegGroup::kMaxVirt); _preservedRegs[group] = regs; } //! \} }; //! Function signature. //! //! Contains information about function return type, count of arguments and their TypeIds. Function signature is //! a low level structure which doesn't contain platform specific or calling convention specific information. struct FuncSignature { //! \name Constants //! \{ enum : uint8_t { //! Doesn't have variable number of arguments (`...`). kNoVarArgs = 0xFFu }; //! \} //! \name Members //! \{ //! Calling convention id. CallConvId _ccId; //! Count of arguments. uint8_t _argCount; //! Index of a first VA or `kNoVarArgs`. uint8_t _vaIndex; //! Return value TypeId. TypeId _ret; //! Function arguments TypeIds. const TypeId* _args; //! \} //! \name Initializtion & Reset //! \{ //! Initializes the function signature. inline void init(CallConvId ccId, uint32_t vaIndex, TypeId ret, const TypeId* args, uint32_t argCount) noexcept { ASMJIT_ASSERT(argCount <= 0xFF); _ccId = ccId; _argCount = uint8_t(argCount); _vaIndex = uint8_t(vaIndex); _ret = ret; _args = args; } inline void reset() noexcept { memset(this, 0, sizeof(*this)); } //! \} //! \name Accessors //! \{ //! Returns the calling convention. inline CallConvId callConvId() const noexcept { return _ccId; } //! Sets the calling convention to `ccId`; inline void setCallConvId(CallConvId ccId) noexcept { _ccId = ccId; } //! Tests whether the function has variable number of arguments (...). inline bool hasVarArgs() const noexcept { return _vaIndex != kNoVarArgs; } //! Returns the variable arguments (...) index, `kNoVarArgs` if none. inline uint32_t vaIndex() const noexcept { return _vaIndex; } //! Sets the variable arguments (...) index to `index`. inline void setVaIndex(uint32_t index) noexcept { _vaIndex = uint8_t(index); } //! Resets the variable arguments index (making it a non-va function). inline void resetVaIndex() noexcept { _vaIndex = kNoVarArgs; } //! Returns the number of function arguments. inline uint32_t argCount() const noexcept { return _argCount; } inline bool hasRet() const noexcept { return _ret != TypeId::kVoid; } //! Returns the return value type. inline TypeId ret() const noexcept { return _ret; } //! Returns the type of the argument at index `i`. inline TypeId arg(uint32_t i) const noexcept { ASMJIT_ASSERT(i < _argCount); return _args[i]; } //! Returns the array of function arguments' types. inline const TypeId* args() const noexcept { return _args; } //! \} }; template class FuncSignatureT : public FuncSignature { public: inline FuncSignatureT(CallConvId ccId = CallConvId::kHost, uint32_t vaIndex = kNoVarArgs) noexcept { static constexpr TypeId ret_args[] = { (TypeId(TypeUtils::TypeIdOfT::kTypeId))... }; init(ccId, vaIndex, ret_args[0], ret_args + 1, uint32_t(ASMJIT_ARRAY_SIZE(ret_args) - 1)); } }; //! Function signature builder. class FuncSignatureBuilder : public FuncSignature { public: TypeId _builderArgList[Globals::kMaxFuncArgs]; //! \name Initializtion & Reset //! \{ inline FuncSignatureBuilder(CallConvId ccId = CallConvId::kHost, uint32_t vaIndex = kNoVarArgs) noexcept { init(ccId, vaIndex, TypeId::kVoid, _builderArgList, 0); } //! \} //! \name Accessors //! \{ //! Sets the return type to `retType`. inline void setRet(TypeId retType) noexcept { _ret = retType; } //! Sets the return type based on `T`. template inline void setRetT() noexcept { setRet(TypeId(TypeUtils::TypeIdOfT::kTypeId)); } //! Sets the argument at index `index` to `argType`. inline void setArg(uint32_t index, TypeId argType) noexcept { ASMJIT_ASSERT(index < _argCount); _builderArgList[index] = argType; } //! Sets the argument at index `i` to the type based on `T`. template inline void setArgT(uint32_t index) noexcept { setArg(index, TypeId(TypeUtils::TypeIdOfT::kTypeId)); } //! Appends an argument of `type` to the function prototype. inline void addArg(TypeId type) noexcept { ASMJIT_ASSERT(_argCount < Globals::kMaxFuncArgs); _builderArgList[_argCount++] = type; } //! Appends an argument of type based on `T` to the function prototype. template inline void addArgT() noexcept { addArg(TypeId(TypeUtils::TypeIdOfT::kTypeId)); } //! \} }; //! Argument or return value (or its part) as defined by `FuncSignature`, but with register or stack address //! (and other metadata) assigned. struct FuncValue { //! \name Constants //! \{ enum Bits : uint32_t { kTypeIdShift = 0, //!< TypeId shift. kTypeIdMask = 0x000000FFu, //!< TypeId mask. kFlagIsReg = 0x00000100u, //!< Passed by register. kFlagIsStack = 0x00000200u, //!< Passed by stack. kFlagIsIndirect = 0x00000400u, //!< Passed indirectly by reference (internally a pointer). kFlagIsDone = 0x00000800u, //!< Used internally by arguments allocator. kStackOffsetShift = 12, //!< Stack offset shift. kStackOffsetMask = 0xFFFFF000u, //!< Stack offset mask (must occupy MSB bits). kRegIdShift = 16, //!< RegId shift. kRegIdMask = 0x00FF0000u, //!< RegId mask. kRegTypeShift = 24, //!< RegType shift. kRegTypeMask = 0xFF000000u //!< RegType mask. }; //! \} //! \name Members //! \{ uint32_t _data; //! \} //! \name Initializtion & Reset //! //! These initialize the whole `FuncValue` to either register or stack. Useful when you know all of these //! properties and wanna just set it up. //! //! \{ //! Initializes the `typeId` of this `FuncValue`. inline void initTypeId(TypeId typeId) noexcept { _data = uint32_t(typeId) << kTypeIdShift; } inline void initReg(RegType regType, uint32_t regId, TypeId typeId, uint32_t flags = 0) noexcept { _data = (uint32_t(regType) << kRegTypeShift) | (regId << kRegIdShift) | (uint32_t(typeId) << kTypeIdShift) | kFlagIsReg | flags; } inline void initStack(int32_t offset, TypeId typeId) noexcept { _data = (uint32_t(offset) << kStackOffsetShift) | (uint32_t(typeId) << kTypeIdShift) | kFlagIsStack; } //! Resets the value to its unassigned state. inline void reset() noexcept { _data = 0; } //! \} //! \name Assign //! //! These initialize only part of `FuncValue`, useful when building `FuncValue` incrementally. The caller //! should first init the type-id by caliing `initTypeId` and then continue building either register or stack. //! //! \{ inline void assignRegData(RegType regType, uint32_t regId) noexcept { ASMJIT_ASSERT((_data & (kRegTypeMask | kRegIdMask)) == 0); _data |= (uint32_t(regType) << kRegTypeShift) | (regId << kRegIdShift) | kFlagIsReg; } inline void assignStackOffset(int32_t offset) noexcept { ASMJIT_ASSERT((_data & kStackOffsetMask) == 0); _data |= (uint32_t(offset) << kStackOffsetShift) | kFlagIsStack; } //! \} //! \name Accessors //! \{ //! Returns true if the value is initialized (explicit bool cast). inline explicit operator bool() const noexcept { return _data != 0; } inline void _replaceValue(uint32_t mask, uint32_t value) noexcept { _data = (_data & ~mask) | value; } //! Tests whether the `FuncValue` has a flag `flag` set. inline bool hasFlag(uint32_t flag) const noexcept { return Support::test(_data, flag); } //! Adds `flags` to `FuncValue`. inline void addFlags(uint32_t flags) noexcept { _data |= flags; } //! Clears `flags` of `FuncValue`. inline void clearFlags(uint32_t flags) noexcept { _data &= ~flags; } //! Tests whether the value is initialized (i.e. contains a valid data). inline bool isInitialized() const noexcept { return _data != 0; } //! Tests whether the argument is passed by register. inline bool isReg() const noexcept { return hasFlag(kFlagIsReg); } //! Tests whether the argument is passed by stack. inline bool isStack() const noexcept { return hasFlag(kFlagIsStack); } //! Tests whether the argument is passed by register. inline bool isAssigned() const noexcept { return hasFlag(kFlagIsReg | kFlagIsStack); } //! Tests whether the argument is passed through a pointer (used by WIN64 to pass XMM|YMM|ZMM). inline bool isIndirect() const noexcept { return hasFlag(kFlagIsIndirect); } //! Tests whether the argument was already processed (used internally). inline bool isDone() const noexcept { return hasFlag(kFlagIsDone); } //! Returns a register type of the register used to pass function argument or return value. inline RegType regType() const noexcept { return RegType((_data & kRegTypeMask) >> kRegTypeShift); } //! Sets a register type of the register used to pass function argument or return value. inline void setRegType(RegType regType) noexcept { _replaceValue(kRegTypeMask, uint32_t(regType) << kRegTypeShift); } //! Returns a physical id of the register used to pass function argument or return value. inline uint32_t regId() const noexcept { return (_data & kRegIdMask) >> kRegIdShift; } //! Sets a physical id of the register used to pass function argument or return value. inline void setRegId(uint32_t regId) noexcept { _replaceValue(kRegIdMask, regId << kRegIdShift); } //! Returns a stack offset of this argument. inline int32_t stackOffset() const noexcept { return int32_t(_data & kStackOffsetMask) >> kStackOffsetShift; } //! Sets a stack offset of this argument. inline void setStackOffset(int32_t offset) noexcept { _replaceValue(kStackOffsetMask, uint32_t(offset) << kStackOffsetShift); } //! Tests whether the argument or return value has associated `TypeId`. inline bool hasTypeId() const noexcept { return Support::test(_data, kTypeIdMask); } //! Returns a TypeId of this argument or return value. inline TypeId typeId() const noexcept { return TypeId((_data & kTypeIdMask) >> kTypeIdShift); } //! Sets a TypeId of this argument or return value. inline void setTypeId(TypeId typeId) noexcept { _replaceValue(kTypeIdMask, uint32_t(typeId) << kTypeIdShift); } //! \} }; //! Contains multiple `FuncValue` instances in an array so functions that use multiple registers for arguments or //! return values can represent all inputs and outputs. struct FuncValuePack { public: //! \name Members //! \{ //! Values of the pack. FuncValue _values[Globals::kMaxValuePack]; //! \} //! \name Initialization & Reset //! \{ //! Resets all values in the pack. inline void reset() noexcept { for (size_t i = 0; i < Globals::kMaxValuePack; i++) _values[i].reset(); } //! \} //! \name Accessors //! \{ //! Calculates how many values are in the pack, checking for non-values from the end. inline uint32_t count() const noexcept { uint32_t n = Globals::kMaxValuePack; while (n && !_values[n - 1]) n--; return n; } inline FuncValue* values() noexcept { return _values; } inline const FuncValue* values() const noexcept { return _values; } inline void resetValue(size_t index) noexcept { ASMJIT_ASSERT(index < Globals::kMaxValuePack); _values[index].reset(); } inline bool hasValue(size_t index) noexcept { ASMJIT_ASSERT(index < Globals::kMaxValuePack); return _values[index].isInitialized(); } inline void assignReg(size_t index, const BaseReg& reg, TypeId typeId = TypeId::kVoid) noexcept { ASMJIT_ASSERT(index < Globals::kMaxValuePack); ASMJIT_ASSERT(reg.isPhysReg()); _values[index].initReg(reg.type(), reg.id(), typeId); } inline void assignReg(size_t index, RegType regType, uint32_t regId, TypeId typeId = TypeId::kVoid) noexcept { ASMJIT_ASSERT(index < Globals::kMaxValuePack); _values[index].initReg(regType, regId, typeId); } inline void assignStack(size_t index, int32_t offset, TypeId typeId = TypeId::kVoid) noexcept { ASMJIT_ASSERT(index < Globals::kMaxValuePack); _values[index].initStack(offset, typeId); } inline FuncValue& operator[](size_t index) { ASMJIT_ASSERT(index < Globals::kMaxValuePack); return _values[index]; } inline const FuncValue& operator[](size_t index) const { ASMJIT_ASSERT(index < Globals::kMaxValuePack); return _values[index]; } //! \} }; //! Attributes are designed in a way that all are initially false, and user or \ref FuncFrame finalizer adds //! them when necessary. enum class FuncAttributes : uint32_t { //! No attributes. kNoAttributes = 0, //! Function has variable number of arguments. kHasVarArgs = 0x00000001u, //! Preserve frame pointer (don't omit FP). kHasPreservedFP = 0x00000010u, //! Function calls other functions (is not leaf). kHasFuncCalls = 0x00000020u, //! Function has aligned save/restore of vector registers. kAlignedVecSR = 0x00000040u, //! FuncFrame is finalized and can be used by prolog/epilog inserter (PEI). kIsFinalized = 0x00000800u, // X86 Specific Attributes // ----------------------- //! Enables the use of AVX within the function's body, prolog, and epilog (X86). //! //! This flag instructs prolog and epilog emitter to use AVX instead of SSE for manipulating XMM registers. kX86_AVXEnabled = 0x00010000u, //! Enables the use of AVX-512 within the function's body, prolog, and epilog (X86). //! //! This flag instructs Compiler register allocator to use additional 16 registers introduced by AVX-512. //! Additionally, if the functions saves full width of ZMM registers (custom calling conventions only) then //! the prolog/epilog inserter would use AVX-512 move instructions to emit the save and restore sequence. kX86_AVX512Enabled = 0x00020000u, //! This flag instructs the epilog writer to emit EMMS instruction before RET (X86). kX86_MMXCleanup = 0x00040000u, //! This flag instructs the epilog writer to emit VZEROUPPER instruction before RET (X86). kX86_AVXCleanup = 0x00080000u }; ASMJIT_DEFINE_ENUM_FLAGS(FuncAttributes) //! Function detail - \ref CallConv and expanded \ref FuncSignature. //! //! Function detail is architecture and OS dependent representation of a function. It contains a materialized //! calling convention and expanded function signature so all arguments have assigned either register type/id //! or stack address. class FuncDetail { public: //! \name Constants //! \{ enum : uint8_t { //! Doesn't have variable number of arguments (`...`). kNoVarArgs = 0xFFu }; //! \} //! \name Members //! \{ //! Calling convention. CallConv _callConv; //! Number of function arguments. uint8_t _argCount; //! Variable arguments index of `kNoVarArgs`. uint8_t _vaIndex; //! Reserved for future use. uint16_t _reserved; //! Registers that contain arguments. Support::Array _usedRegs; //! Size of arguments passed by stack. uint32_t _argStackSize; //! Function return value(s). FuncValuePack _rets; //! Function arguments. FuncValuePack _args[Globals::kMaxFuncArgs]; //! \} //! \name Construction & Destruction //! \{ inline FuncDetail() noexcept { reset(); } inline FuncDetail(const FuncDetail& other) noexcept = default; //! Initializes this `FuncDetail` to the given signature. ASMJIT_API Error init(const FuncSignature& signature, const Environment& environment) noexcept; inline void reset() noexcept { memset(this, 0, sizeof(*this)); } //! \} //! \name Accessors //! \{ //! Returns the function's calling convention, see `CallConv`. inline const CallConv& callConv() const noexcept { return _callConv; } //! Returns the associated calling convention flags, see `CallConv::Flags`. inline CallConvFlags flags() const noexcept { return _callConv.flags(); } //! Checks whether a CallConv `flag` is set, see `CallConv::Flags`. inline bool hasFlag(CallConvFlags ccFlag) const noexcept { return _callConv.hasFlag(ccFlag); } //! Tests whether the function has a return value. inline bool hasRet() const noexcept { return bool(_rets[0]); } //! Returns the number of function arguments. inline uint32_t argCount() const noexcept { return _argCount; } //! Returns function return values. inline FuncValuePack& retPack() noexcept { return _rets; } //! Returns function return values. inline const FuncValuePack& retPack() const noexcept { return _rets; } //! Returns a function return value associated with the given `valueIndex`. inline FuncValue& ret(size_t valueIndex = 0) noexcept { return _rets[valueIndex]; } //! Returns a function return value associated with the given `valueIndex` (const). inline const FuncValue& ret(size_t valueIndex = 0) const noexcept { return _rets[valueIndex]; } //! Returns function argument packs array. inline FuncValuePack* argPacks() noexcept { return _args; } //! Returns function argument packs array (const). inline const FuncValuePack* argPacks() const noexcept { return _args; } //! Returns function argument pack at the given `argIndex`. inline FuncValuePack& argPack(size_t argIndex) noexcept { ASMJIT_ASSERT(argIndex < Globals::kMaxFuncArgs); return _args[argIndex]; } //! Returns function argument pack at the given `argIndex` (const). inline const FuncValuePack& argPack(size_t argIndex) const noexcept { ASMJIT_ASSERT(argIndex < Globals::kMaxFuncArgs); return _args[argIndex]; } //! Returns an argument at `valueIndex` from the argument pack at the given `argIndex`. inline FuncValue& arg(size_t argIndex, size_t valueIndex = 0) noexcept { ASMJIT_ASSERT(argIndex < Globals::kMaxFuncArgs); return _args[argIndex][valueIndex]; } //! Returns an argument at `valueIndex` from the argument pack at the given `argIndex` (const). inline const FuncValue& arg(size_t argIndex, size_t valueIndex = 0) const noexcept { ASMJIT_ASSERT(argIndex < Globals::kMaxFuncArgs); return _args[argIndex][valueIndex]; } //! Resets an argument at the given `argIndex`. //! //! If the argument is a parameter pack (has multiple values) all values are reset. inline void resetArg(size_t argIndex) noexcept { ASMJIT_ASSERT(argIndex < Globals::kMaxFuncArgs); _args[argIndex].reset(); } //! Tests whether the function has variable arguments. inline bool hasVarArgs() const noexcept { return _vaIndex != kNoVarArgs; } //! Returns an index of a first variable argument. inline uint32_t vaIndex() const noexcept { return _vaIndex; } //! Tests whether the function passes one or more argument by stack. inline bool hasStackArgs() const noexcept { return _argStackSize != 0; } //! Returns stack size needed for function arguments passed on the stack. inline uint32_t argStackSize() const noexcept { return _argStackSize; } //! Returns red zone size. inline uint32_t redZoneSize() const noexcept { return _callConv.redZoneSize(); } //! Returns spill zone size. inline uint32_t spillZoneSize() const noexcept { return _callConv.spillZoneSize(); } //! Returns natural stack alignment. inline uint32_t naturalStackAlignment() const noexcept { return _callConv.naturalStackAlignment(); } //! Returns a mask of all passed registers of the given register `group`. inline RegMask passedRegs(RegGroup group) const noexcept { return _callConv.passedRegs(group); } //! Returns a mask of all preserved registers of the given register `group`. inline RegMask preservedRegs(RegGroup group) const noexcept { return _callConv.preservedRegs(group); } //! Returns a mask of all used registers of the given register `group`. inline RegMask usedRegs(RegGroup group) const noexcept { ASMJIT_ASSERT(group <= RegGroup::kMaxVirt); return _usedRegs[size_t(group)]; } //! Adds `regs` to the mask of used registers of the given register `group`. inline void addUsedRegs(RegGroup group, RegMask regs) noexcept { ASMJIT_ASSERT(group <= RegGroup::kMaxVirt); _usedRegs[size_t(group)] |= regs; } //! \} }; //! Function frame. //! //! Function frame is used directly by prolog and epilog insertion (PEI) utils. It provides information necessary to //! insert a proper and ABI comforming prolog and epilog. Function frame calculation is based on `CallConv` and //! other function attributes. //! //! SSE vs AVX vs AVX-512 //! --------------------- //! //! Function frame provides a way to tell prolog/epilog inserter to use AVX instructions instead of SSE. Use //! `setAvxEnabled()` and `setAvx512Enabled()` to enable AVX and/or AVX-512, respectively. Enabling AVX-512 //! is mostly for Compiler as it would use 32 SIMD registers instead of 16 when enabled. //! //! \note If your code uses AVX instructions and AVX is not enabled there would be a performance hit in case that //! some registers had to be saved/restored in function's prolog/epilog, respectively. Thus, it's recommended to //! always let the function frame know about the use of AVX. //! //! Function Frame Structure //! ------------------------ //! //! Various properties can contribute to the size and structure of the function frame. The function frame in most //! cases won't use all of the properties illustrated (for example Spill Zone and Red Zone are never used together). //! //! ``` //! +-----------------------------+ //! | Arguments Passed by Stack | //! +-----------------------------+ //! | Spill Zone | //! +-----------------------------+ <- Stack offset (args) starts from here. //! | Return Address, if Pushed | //! +-----------------------------+ <- Stack pointer (SP) upon entry. //! | Save/Restore Stack. | //! +-----------------------------+-----------------------------+ //! | Local Stack | | //! +-----------------------------+ Final Stack | //! | Call Stack | | //! +-----------------------------+-----------------------------+ <- SP after prolog. //! | Red Zone | //! +-----------------------------+ //! ``` class FuncFrame { public: //! \name Constants //! \{ enum : uint32_t { //! Tag used to inform that some offset is invalid. kTagInvalidOffset = 0xFFFFFFFFu }; //! \} //! \name Members //! \{ //! Function attributes. FuncAttributes _attributes; //! Target architecture. Arch _arch; //! SP register ID (to access call stack and local stack). uint8_t _spRegId; //! SA register ID (to access stack arguments). uint8_t _saRegId; //! Red zone size (copied from CallConv). uint8_t _redZoneSize; //! Spill zone size (copied from CallConv). uint8_t _spillZoneSize; //! Natural stack alignment (copied from CallConv). uint8_t _naturalStackAlignment; //! Minimum stack alignment to turn on dynamic alignment. uint8_t _minDynamicAlignment; //! Call stack alignment. uint8_t _callStackAlignment; //! Local stack alignment. uint8_t _localStackAlignment; //! Final stack alignment. uint8_t _finalStackAlignment; //! Adjustment of the stack before returning (X86-STDCALL). uint16_t _calleeStackCleanup; //! Call stack size. uint32_t _callStackSize; //! Local stack size. uint32_t _localStackSize; //! Final stack size (sum of call stack and local stack). uint32_t _finalStackSize; //! Local stack offset (non-zero only if call stack is used). uint32_t _localStackOffset; //! Offset relative to SP that contains previous SP (before alignment). uint32_t _daOffset; //! Offset of the first stack argument relative to SP. uint32_t _saOffsetFromSP; //! Offset of the first stack argument relative to SA (_saRegId or FP). uint32_t _saOffsetFromSA; //! Local stack adjustment in prolog/epilog. uint32_t _stackAdjustment; //! Registers that are dirty. Support::Array _dirtyRegs; //! Registers that must be preserved (copied from CallConv). Support::Array _preservedRegs; //! Size to save/restore per register group. Support::Array _saveRestoreRegSize; //! Alignment of save/restore area per register group. Support::Array _saveRestoreAlignment; //! Stack size required to save registers with push/pop. uint16_t _pushPopSaveSize; //! Stack size required to save extra registers that cannot use push/pop. uint16_t _extraRegSaveSize; //! Offset where registers saved/restored via push/pop are stored uint32_t _pushPopSaveOffset; //! Offset where extra ragisters that cannot use push/pop are stored. uint32_t _extraRegSaveOffset; //! \} //! \name Construction & Destruction //! \{ inline FuncFrame() noexcept { reset(); } inline FuncFrame(const FuncFrame& other) noexcept = default; ASMJIT_API Error init(const FuncDetail& func) noexcept; inline void reset() noexcept { memset(this, 0, sizeof(FuncFrame)); _spRegId = BaseReg::kIdBad; _saRegId = BaseReg::kIdBad; _daOffset = kTagInvalidOffset; } //! \} //! \name Accessors //! \{ //! Returns the target architecture of the function frame. inline Arch arch() const noexcept { return _arch; } //! Returns function frame attributes, see `Attributes`. inline FuncAttributes attributes() const noexcept { return _attributes; } //! Checks whether the FuncFame contains an attribute `attr`. inline bool hasAttribute(FuncAttributes attr) const noexcept { return Support::test(_attributes, attr); } //! Adds attributes `attrs` to the FuncFrame. inline void addAttributes(FuncAttributes attrs) noexcept { _attributes |= attrs; } //! Clears attributes `attrs` from the FrameFrame. inline void clearAttributes(FuncAttributes attrs) noexcept { _attributes &= ~attrs; } //! Tests whether the function has variable number of arguments. inline bool hasVarArgs() const noexcept { return hasAttribute(FuncAttributes::kHasVarArgs); } //! Sets the variable arguments flag. inline void setVarArgs() noexcept { addAttributes(FuncAttributes::kHasVarArgs); } //! Resets variable arguments flag. inline void resetVarArgs() noexcept { clearAttributes(FuncAttributes::kHasVarArgs); } //! Tests whether the function preserves frame pointer (EBP|ESP on X86). inline bool hasPreservedFP() const noexcept { return hasAttribute(FuncAttributes::kHasPreservedFP); } //! Enables preserved frame pointer. inline void setPreservedFP() noexcept { addAttributes(FuncAttributes::kHasPreservedFP); } //! Disables preserved frame pointer. inline void resetPreservedFP() noexcept { clearAttributes(FuncAttributes::kHasPreservedFP); } //! Tests whether the function calls other functions. inline bool hasFuncCalls() const noexcept { return hasAttribute(FuncAttributes::kHasFuncCalls); } //! Sets `kFlagHasCalls` to true. inline void setFuncCalls() noexcept { addAttributes(FuncAttributes::kHasFuncCalls); } //! Sets `kFlagHasCalls` to false. inline void resetFuncCalls() noexcept { clearAttributes(FuncAttributes::kHasFuncCalls); } //! Tests whether the function has AVX enabled. inline bool isAvxEnabled() const noexcept { return hasAttribute(FuncAttributes::kX86_AVXEnabled); } //! Enables AVX use. inline void setAvxEnabled() noexcept { addAttributes(FuncAttributes::kX86_AVXEnabled); } //! Disables AVX use. inline void resetAvxEnabled() noexcept { clearAttributes(FuncAttributes::kX86_AVXEnabled); } //! Tests whether the function has AVX-512 enabled. inline bool isAvx512Enabled() const noexcept { return hasAttribute(FuncAttributes::kX86_AVX512Enabled); } //! Enables AVX-512 use. inline void setAvx512Enabled() noexcept { addAttributes(FuncAttributes::kX86_AVX512Enabled); } //! Disables AVX-512 use. inline void resetAvx512Enabled() noexcept { clearAttributes(FuncAttributes::kX86_AVX512Enabled); } //! Tests whether the function has MMX cleanup - 'emms' instruction in epilog. inline bool hasMmxCleanup() const noexcept { return hasAttribute(FuncAttributes::kX86_MMXCleanup); } //! Enables MMX cleanup. inline void setMmxCleanup() noexcept { addAttributes(FuncAttributes::kX86_MMXCleanup); } //! Disables MMX cleanup. inline void resetMmxCleanup() noexcept { clearAttributes(FuncAttributes::kX86_MMXCleanup); } //! Tests whether the function has AVX cleanup - 'vzeroupper' instruction in epilog. inline bool hasAvxCleanup() const noexcept { return hasAttribute(FuncAttributes::kX86_AVXCleanup); } //! Enables AVX cleanup. inline void setAvxCleanup() noexcept { addAttributes(FuncAttributes::kX86_AVXCleanup); } //! Disables AVX cleanup. inline void resetAvxCleanup() noexcept { clearAttributes(FuncAttributes::kX86_AVXCleanup); } //! Tests whether the function uses call stack. inline bool hasCallStack() const noexcept { return _callStackSize != 0; } //! Tests whether the function uses local stack. inline bool hasLocalStack() const noexcept { return _localStackSize != 0; } //! Tests whether vector registers can be saved and restored by using aligned reads and writes. inline bool hasAlignedVecSR() const noexcept { return hasAttribute(FuncAttributes::kAlignedVecSR); } //! Tests whether the function has to align stack dynamically. inline bool hasDynamicAlignment() const noexcept { return _finalStackAlignment >= _minDynamicAlignment; } //! Tests whether the calling convention specifies 'RedZone'. inline bool hasRedZone() const noexcept { return _redZoneSize != 0; } //! Tests whether the calling convention specifies 'SpillZone'. inline bool hasSpillZone() const noexcept { return _spillZoneSize != 0; } //! Returns the size of 'RedZone'. inline uint32_t redZoneSize() const noexcept { return _redZoneSize; } //! Returns the size of 'SpillZone'. inline uint32_t spillZoneSize() const noexcept { return _spillZoneSize; } //! Resets the size of red zone, which would disable it entirely. //! //! \note Red zone is currently only used by an AMD64 SystemV calling convention, which expects 128 //! bytes of stack to be accessible below stack pointer. These bytes are then accessible within the //! function and Compiler can use this space as a spill area. However, sometimes it's better to //! disallow the use of red zone in case that a user wants to use this stack for a custom purpose. inline void resetRedZone() noexcept { _redZoneSize = 0; } //! Returns natural stack alignment (guaranteed stack alignment upon entry). inline uint32_t naturalStackAlignment() const noexcept { return _naturalStackAlignment; } //! Returns natural stack alignment (guaranteed stack alignment upon entry). inline uint32_t minDynamicAlignment() const noexcept { return _minDynamicAlignment; } //! Tests whether the callee must adjust SP before returning (X86-STDCALL only) inline bool hasCalleeStackCleanup() const noexcept { return _calleeStackCleanup != 0; } //! Returns home many bytes of the stack the callee must adjust before returning (X86-STDCALL only) inline uint32_t calleeStackCleanup() const noexcept { return _calleeStackCleanup; } //! Returns call stack alignment. inline uint32_t callStackAlignment() const noexcept { return _callStackAlignment; } //! Returns local stack alignment. inline uint32_t localStackAlignment() const noexcept { return _localStackAlignment; } //! Returns final stack alignment (the maximum value of call, local, and natural stack alignments). inline uint32_t finalStackAlignment() const noexcept { return _finalStackAlignment; } //! Sets call stack alignment. //! //! \note This also updates the final stack alignment. inline void setCallStackAlignment(uint32_t alignment) noexcept { _callStackAlignment = uint8_t(alignment); _finalStackAlignment = Support::max(_naturalStackAlignment, _callStackAlignment, _localStackAlignment); } //! Sets local stack alignment. //! //! \note This also updates the final stack alignment. inline void setLocalStackAlignment(uint32_t value) noexcept { _localStackAlignment = uint8_t(value); _finalStackAlignment = Support::max(_naturalStackAlignment, _callStackAlignment, _localStackAlignment); } //! Combines call stack alignment with `alignment`, updating it to the greater value. //! //! \note This also updates the final stack alignment. inline void updateCallStackAlignment(uint32_t alignment) noexcept { _callStackAlignment = uint8_t(Support::max(_callStackAlignment, alignment)); _finalStackAlignment = Support::max(_finalStackAlignment, _callStackAlignment); } //! Combines local stack alignment with `alignment`, updating it to the greater value. //! //! \note This also updates the final stack alignment. inline void updateLocalStackAlignment(uint32_t alignment) noexcept { _localStackAlignment = uint8_t(Support::max(_localStackAlignment, alignment)); _finalStackAlignment = Support::max(_finalStackAlignment, _localStackAlignment); } //! Returns call stack size. inline uint32_t callStackSize() const noexcept { return _callStackSize; } //! Returns local stack size. inline uint32_t localStackSize() const noexcept { return _localStackSize; } //! Sets call stack size. inline void setCallStackSize(uint32_t size) noexcept { _callStackSize = size; } //! Sets local stack size. inline void setLocalStackSize(uint32_t size) noexcept { _localStackSize = size; } //! Combines call stack size with `size`, updating it to the greater value. inline void updateCallStackSize(uint32_t size) noexcept { _callStackSize = Support::max(_callStackSize, size); } //! Combines local stack size with `size`, updating it to the greater value. inline void updateLocalStackSize(uint32_t size) noexcept { _localStackSize = Support::max(_localStackSize, size); } //! Returns final stack size (only valid after the FuncFrame is finalized). inline uint32_t finalStackSize() const noexcept { return _finalStackSize; } //! Returns an offset to access the local stack (non-zero only if call stack is used). inline uint32_t localStackOffset() const noexcept { return _localStackOffset; } //! Tests whether the function prolog/epilog requires a memory slot for storing unaligned SP. inline bool hasDAOffset() const noexcept { return _daOffset != kTagInvalidOffset; } //! Returns a memory offset used to store DA (dynamic alignment) slot (relative to SP). inline uint32_t daOffset() const noexcept { return _daOffset; } inline uint32_t saOffset(uint32_t regId) const noexcept { return regId == _spRegId ? saOffsetFromSP() : saOffsetFromSA(); } inline uint32_t saOffsetFromSP() const noexcept { return _saOffsetFromSP; } inline uint32_t saOffsetFromSA() const noexcept { return _saOffsetFromSA; } //! Returns mask of registers of the given register `group` that are modified by the function. The engine would //! then calculate which registers must be saved & restored by the function by using the data provided by the //! calling convention. inline RegMask dirtyRegs(RegGroup group) const noexcept { ASMJIT_ASSERT(group <= RegGroup::kMaxVirt); return _dirtyRegs[group]; } //! Sets which registers (as a mask) are modified by the function. //! //! \remarks Please note that this will completely overwrite the existing register mask, use `addDirtyRegs()` //! to modify the existing register mask. inline void setDirtyRegs(RegGroup group, RegMask regs) noexcept { ASMJIT_ASSERT(group <= RegGroup::kMaxVirt); _dirtyRegs[group] = regs; } //! Adds which registers (as a mask) are modified by the function. inline void addDirtyRegs(RegGroup group, RegMask regs) noexcept { ASMJIT_ASSERT(group <= RegGroup::kMaxVirt); _dirtyRegs[group] |= regs; } //! \overload inline void addDirtyRegs(const BaseReg& reg) noexcept { ASMJIT_ASSERT(reg.id() < Globals::kMaxPhysRegs); addDirtyRegs(reg.group(), Support::bitMask(reg.id())); } //! \overload template inline void addDirtyRegs(const BaseReg& reg, Args&&... args) noexcept { addDirtyRegs(reg); addDirtyRegs(std::forward(args)...); } inline void setAllDirty() noexcept { for (size_t i = 0; i < ASMJIT_ARRAY_SIZE(_dirtyRegs); i++) _dirtyRegs[i] = 0xFFFFFFFFu; } inline void setAllDirty(RegGroup group) noexcept { ASMJIT_ASSERT(group <= RegGroup::kMaxVirt); _dirtyRegs[group] = 0xFFFFFFFFu; } //! Returns a calculated mask of registers of the given `group` that will be saved and restored in the function's //! prolog and epilog, respectively. The register mask is calculated from both `dirtyRegs` (provided by user) and //! `preservedMask` (provided by the calling convention). inline RegMask savedRegs(RegGroup group) const noexcept { ASMJIT_ASSERT(group <= RegGroup::kMaxVirt); return _dirtyRegs[group] & _preservedRegs[group]; } //! Returns the mask of preserved registers of the given register `group`. //! //! Preserved registers are those that must survive the function call unmodified. The function can only modify //! preserved registers it they are saved and restored in funciton's prolog and epilog, respectively. inline RegMask preservedRegs(RegGroup group) const noexcept { ASMJIT_ASSERT(group <= RegGroup::kMaxVirt); return _preservedRegs[group]; } inline uint32_t saveRestoreRegSize(RegGroup group) const noexcept { ASMJIT_ASSERT(group <= RegGroup::kMaxVirt); return _saveRestoreRegSize[group]; } inline uint32_t saveRestoreAlignment(RegGroup group) const noexcept { ASMJIT_ASSERT(group <= RegGroup::kMaxVirt); return _saveRestoreAlignment[group]; } inline bool hasSARegId() const noexcept { return _saRegId != BaseReg::kIdBad; } inline uint32_t saRegId() const noexcept { return _saRegId; } inline void setSARegId(uint32_t regId) { _saRegId = uint8_t(regId); } inline void resetSARegId() { setSARegId(BaseReg::kIdBad); } //! Returns stack size required to save/restore registers via push/pop. inline uint32_t pushPopSaveSize() const noexcept { return _pushPopSaveSize; } //! Returns an offset to the stack where registers are saved via push/pop. inline uint32_t pushPopSaveOffset() const noexcept { return _pushPopSaveOffset; } //! Returns stack size required to save/restore extra registers that don't use push/pop/ //! //! \note On X86 this covers all registers except GP registers, on other architectures it can be always //! zero (for example AArch64 saves all registers via push/pop like instructions, so this would be zero). inline uint32_t extraRegSaveSize() const noexcept { return _extraRegSaveSize; } //! Returns an offset to the stack where extra registers are saved. inline uint32_t extraRegSaveOffset() const noexcept { return _extraRegSaveOffset; } //! Tests whether the functions contains stack adjustment. inline bool hasStackAdjustment() const noexcept { return _stackAdjustment != 0; } //! Returns function's stack adjustment used in function's prolog and epilog. //! //! If the returned value is zero it means that the stack is not adjusted. This can mean both that the stack //! is not used and/or the stack is only adjusted by instructions that pust/pop registers into/from stack. inline uint32_t stackAdjustment() const noexcept { return _stackAdjustment; } //! \} //! \name Finaliztion //! \{ ASMJIT_API Error finalize() noexcept; //! \} }; //! A helper class that can be used to assign a physical register for each function argument. Use with //! `BaseEmitter::emitArgsAssignment()`. class FuncArgsAssignment { public: //! \name Members //! \{ //! Function detail. const FuncDetail* _funcDetail; //! Register that can be used to access arguments passed by stack. uint8_t _saRegId; //! Reserved for future use. uint8_t _reserved[3]; //! Mapping of each function argument. FuncValuePack _argPacks[Globals::kMaxFuncArgs]; //! \} //! \name Construction & Destruction //! \{ inline explicit FuncArgsAssignment(const FuncDetail* fd = nullptr) noexcept { reset(fd); } inline FuncArgsAssignment(const FuncArgsAssignment& other) noexcept { memcpy(this, &other, sizeof(*this)); } inline void reset(const FuncDetail* fd = nullptr) noexcept { _funcDetail = fd; _saRegId = uint8_t(BaseReg::kIdBad); memset(_reserved, 0, sizeof(_reserved)); memset(_argPacks, 0, sizeof(_argPacks)); } //! \} //! \name Accessors //! \{ inline const FuncDetail* funcDetail() const noexcept { return _funcDetail; } inline void setFuncDetail(const FuncDetail* fd) noexcept { _funcDetail = fd; } inline bool hasSARegId() const noexcept { return _saRegId != BaseReg::kIdBad; } inline uint32_t saRegId() const noexcept { return _saRegId; } inline void setSARegId(uint32_t regId) { _saRegId = uint8_t(regId); } inline void resetSARegId() { _saRegId = uint8_t(BaseReg::kIdBad); } inline FuncValue& arg(size_t argIndex, size_t valueIndex) noexcept { ASMJIT_ASSERT(argIndex < ASMJIT_ARRAY_SIZE(_argPacks)); return _argPacks[argIndex][valueIndex]; } inline const FuncValue& arg(size_t argIndex, size_t valueIndex) const noexcept { ASMJIT_ASSERT(argIndex < ASMJIT_ARRAY_SIZE(_argPacks)); return _argPacks[argIndex][valueIndex]; } inline bool isAssigned(size_t argIndex, size_t valueIndex) const noexcept { ASMJIT_ASSERT(argIndex < ASMJIT_ARRAY_SIZE(_argPacks)); return _argPacks[argIndex][valueIndex].isAssigned(); } inline void assignReg(size_t argIndex, const BaseReg& reg, TypeId typeId = TypeId::kVoid) noexcept { ASMJIT_ASSERT(argIndex < ASMJIT_ARRAY_SIZE(_argPacks)); ASMJIT_ASSERT(reg.isPhysReg()); _argPacks[argIndex][0].initReg(reg.type(), reg.id(), typeId); } inline void assignReg(size_t argIndex, RegType regType, uint32_t regId, TypeId typeId = TypeId::kVoid) noexcept { ASMJIT_ASSERT(argIndex < ASMJIT_ARRAY_SIZE(_argPacks)); _argPacks[argIndex][0].initReg(regType, regId, typeId); } inline void assignStack(size_t argIndex, int32_t offset, TypeId typeId = TypeId::kVoid) noexcept { ASMJIT_ASSERT(argIndex < ASMJIT_ARRAY_SIZE(_argPacks)); _argPacks[argIndex][0].initStack(offset, typeId); } inline void assignRegInPack(size_t argIndex, size_t valueIndex, const BaseReg& reg, TypeId typeId = TypeId::kVoid) noexcept { ASMJIT_ASSERT(argIndex < ASMJIT_ARRAY_SIZE(_argPacks)); ASMJIT_ASSERT(reg.isPhysReg()); _argPacks[argIndex][valueIndex].initReg(reg.type(), reg.id(), typeId); } inline void assignRegInPack(size_t argIndex, size_t valueIndex, RegType regType, uint32_t regId, TypeId typeId = TypeId::kVoid) noexcept { ASMJIT_ASSERT(argIndex < ASMJIT_ARRAY_SIZE(_argPacks)); _argPacks[argIndex][valueIndex].initReg(regType, regId, typeId); } inline void assignStackInPack(size_t argIndex, size_t valueIndex, int32_t offset, TypeId typeId = TypeId::kVoid) noexcept { ASMJIT_ASSERT(argIndex < ASMJIT_ARRAY_SIZE(_argPacks)); _argPacks[argIndex][valueIndex].initStack(offset, typeId); } // NOTE: All `assignAll()` methods are shortcuts to assign all arguments at once, however, since registers are // passed all at once these initializers don't provide any way to pass TypeId and/or to keep any argument between // the arguments passed unassigned. inline void _assignAllInternal(size_t argIndex, const BaseReg& reg) noexcept { assignReg(argIndex, reg); } template inline void _assignAllInternal(size_t argIndex, const BaseReg& reg, Args&&... args) noexcept { assignReg(argIndex, reg); _assignAllInternal(argIndex + 1, std::forward(args)...); } template inline void assignAll(Args&&... args) noexcept { _assignAllInternal(0, std::forward(args)...); } //! \} //! \name Utilities //! \{ //! Update `FuncFrame` based on function's arguments assignment. //! //! \note You MUST call this in orher to use `BaseEmitter::emitArgsAssignment()`, otherwise the FuncFrame would //! not contain the information necessary to assign all arguments into the registers and/or stack specified. ASMJIT_API Error updateFuncFrame(FuncFrame& frame) const noexcept; //! \} }; //! \} ASMJIT_END_NAMESPACE #endif // ASMJIT_CORE_FUNC_H_INCLUDED