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//===-- llvm/MC/MCInstrInfo.h - Target Instruction Info ---------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file describes the target machine instruction set.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_MCINSTRINFO_H
#define LLVM_MC_MCINSTRINFO_H
#include "llvm/MC/MCInstrDesc.h"
#include <cassert>
namespace llvm {
//---------------------------------------------------------------------------
/// Interface to description of machine instruction set.
class MCInstrInfo {
const MCInstrDesc *Desc; // Raw array to allow static init'n
const unsigned *InstrNameIndices; // Array for name indices in InstrNameData
const char *InstrNameData; // Instruction name string pool
unsigned NumOpcodes; // Number of entries in the desc array
public:
/// Initialize MCInstrInfo, called by TableGen auto-generated routines.
/// *DO NOT USE*.
void InitMCInstrInfo(const MCInstrDesc *D, const unsigned *NI, const char *ND,
unsigned NO) {
Desc = D;
InstrNameIndices = NI;
InstrNameData = ND;
NumOpcodes = NO;
}
unsigned getNumOpcodes() const { return NumOpcodes; }
/// Return the machine instruction descriptor that corresponds to the
/// specified instruction opcode.
const MCInstrDesc &get(unsigned Opcode) const {
assert(Opcode < NumOpcodes && "Invalid opcode!");
return Desc[Opcode];
}
/// Returns the name for the instructions with the given opcode.
StringRef getName(unsigned Opcode) const {
assert(Opcode < NumOpcodes && "Invalid opcode!");
return StringRef(&InstrNameData[InstrNameIndices[Opcode]]);
}
};
} // End llvm namespace
#endif
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