145 lines
5.1 KiB
C++
145 lines
5.1 KiB
C++
//===-- llvm/MC/MCInstrDesc.h - Instruction Descriptors -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the MCOperandInfo and MCInstrDesc classes, which
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// are used to describe target instructions and their operands.
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//
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//===----------------------------------------------------------------------===//
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/* Capstone Disassembly Engine */
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/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013-2014 */
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#ifndef CS_LLVM_MC_MCINSTRDESC_H
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#define CS_LLVM_MC_MCINSTRDESC_H
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#if !defined(_MSC_VER) || !defined(_KERNEL_MODE)
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#include <stdint.h>
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#endif
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#include "include/platform.h"
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//===----------------------------------------------------------------------===//
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// Machine Operand Flags and Description
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//===----------------------------------------------------------------------===//
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// Operand constraints
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enum MCOI_OperandConstraint {
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MCOI_TIED_TO = 0, // Must be allocated the same register as.
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MCOI_EARLY_CLOBBER // Operand is an early clobber register operand
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};
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/// OperandFlags - These are flags set on operands, but should be considered
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/// private, all access should go through the MCOperandInfo accessors.
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/// See the accessors for a description of what these are.
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enum MCOI_OperandFlags {
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MCOI_LookupPtrRegClass = 0,
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MCOI_Predicate,
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MCOI_OptionalDef
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};
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/// Operand Type - Operands are tagged with one of the values of this enum.
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enum MCOI_OperandType {
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MCOI_OPERAND_UNKNOWN,
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MCOI_OPERAND_IMMEDIATE,
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MCOI_OPERAND_REGISTER,
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MCOI_OPERAND_MEMORY,
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MCOI_OPERAND_PCREL
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};
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/// MCOperandInfo - This holds information about one operand of a machine
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/// instruction, indicating the register class for register operands, etc.
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///
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typedef struct MCOperandInfo {
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/// RegClass - This specifies the register class enumeration of the operand
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/// if the operand is a register. If isLookupPtrRegClass is set, then this is
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/// an index that is passed to TargetRegisterInfo::getPointerRegClass(x) to
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/// get a dynamic register class.
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int16_t RegClass;
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/// Flags - These are flags from the MCOI::OperandFlags enum.
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uint8_t Flags;
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/// OperandType - Information about the type of the operand.
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uint8_t OperandType;
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/// Lower 16 bits are used to specify which constraints are set. The higher 16
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/// bits are used to specify the value of constraints (4 bits each).
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uint32_t Constraints;
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/// Currently no other information.
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} MCOperandInfo;
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//===----------------------------------------------------------------------===//
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// Machine Instruction Flags and Description
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//===----------------------------------------------------------------------===//
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/// MCInstrDesc flags - These should be considered private to the
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/// implementation of the MCInstrDesc class. Clients should use the predicate
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/// methods on MCInstrDesc, not use these directly. These all correspond to
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/// bitfields in the MCInstrDesc::Flags field.
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enum {
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MCID_Variadic = 0,
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MCID_HasOptionalDef,
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MCID_Pseudo,
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MCID_Return,
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MCID_Call,
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MCID_Barrier,
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MCID_Terminator,
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MCID_Branch,
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MCID_IndirectBranch,
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MCID_Compare,
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MCID_MoveImm,
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MCID_Bitcast,
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MCID_Select,
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MCID_DelaySlot,
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MCID_FoldableAsLoad,
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MCID_MayLoad,
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MCID_MayStore,
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MCID_Predicable,
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MCID_NotDuplicable,
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MCID_UnmodeledSideEffects,
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MCID_Commutable,
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MCID_ConvertibleTo3Addr,
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MCID_UsesCustomInserter,
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MCID_HasPostISelHook,
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MCID_Rematerializable,
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MCID_CheapAsAMove,
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MCID_ExtraSrcRegAllocReq,
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MCID_ExtraDefRegAllocReq,
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MCID_RegSequence,
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};
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/// MCInstrDesc - Describe properties that are true of each instruction in the
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/// target description file. This captures information about side effects,
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/// register use and many other things. There is one instance of this struct
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/// for each target instruction class, and the MachineInstr class points to
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/// this struct directly to describe itself.
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typedef struct MCInstrDesc {
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unsigned short Opcode; // The opcode number
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unsigned char NumOperands; // Num of args (may be more if variable_ops)
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unsigned char NumDefs; // Num of args that are definitions
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unsigned short SchedClass; // enum identifying instr sched class
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unsigned char Size; // Number of bytes in encoding.
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unsigned Flags; // Flags identifying machine instr class
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uint64_t TSFlags; // Target Specific Flag values
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char ImplicitUses; // Registers implicitly read by this instr
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char ImplicitDefs; // Registers implicitly defined by this instr
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const MCOperandInfo *OpInfo; // 'NumOperands' entries about operands
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uint64_t DeprecatedFeatureMask;// Feature bits that this is deprecated on, if any
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// A complex method to determine is a certain is deprecated or not, and return
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// the reason for deprecation.
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//bool (*ComplexDeprecationInfo)(MCInst &, MCSubtargetInfo &, std::string &);
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unsigned char ComplexDeprecationInfo; // dummy field, just to satisfy initializer
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} MCInstrDesc;
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bool MCOperandInfo_isPredicate(const MCOperandInfo *m);
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bool MCOperandInfo_isOptionalDef(const MCOperandInfo *m);
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#endif
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