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llvm-6502/include/llvm/MC/MCInstrInfo.h
Jakob Stoklund Olesen bcfa982c48 Revert r152202: "Use uint16_t to store InstrNameIndices in MCInstrInfo."
We cannot limit the concatenated instruction names to 64K.  ARM is
already at 32K, and it is easy to imagine a target with more
instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152817 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-15 18:05:57 +00:00

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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 {
//---------------------------------------------------------------------------
///
/// MCInstrInfo - 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:
/// InitMCInstrInfo - 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; }
/// get - 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];
}
/// getName - Returns the name for the instructions with the given opcode.
const char *getName(unsigned Opcode) const {
assert(Opcode < NumOpcodes && "Invalid opcode!");
return &InstrNameData[InstrNameIndices[Opcode]];
}
};
} // End llvm namespace
#endif