llvm-6502/lib/Target/Hexagon/MCTargetDesc/HexagonMCInst.h
Jyotsna Verma d6c98ae638 Hexagon: Move HexagonMCInst.h to MCTargetDesc/HexagonMCInst.h.
Add HexagonMCInst class which adds various Hexagon VLIW annotations.
In addition, this class also includes some APIs related to the
constant extenders.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175634 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-20 16:13:27 +00:00

101 lines
3.1 KiB
C++

//===- HexagonMCInst.h - Hexagon sub-class of MCInst ----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This class extends MCInst to allow some VLIW annotations.
//
//===----------------------------------------------------------------------===//
#ifndef HEXAGONMCINST_H
#define HEXAGONMCINST_H
#include "HexagonTargetMachine.h"
#include "llvm/MC/MCInst.h"
namespace llvm {
class MCOperand;
class HexagonMCInst: public MCInst {
// MCID is set during instruction lowering.
// It is needed in order to access TSFlags for
// use in checking MC instruction properties.
const MCInstrDesc *MCID;
// Packet start and end markers
unsigned packetStart: 1, packetEnd: 1;
public:
explicit HexagonMCInst():
MCInst(), MCID(0), packetStart(0), packetEnd(0) {};
HexagonMCInst(const MCInstrDesc& mcid):
MCInst(), MCID(&mcid), packetStart(0), packetEnd(0) {};
bool isPacketStart() const { return (packetStart); };
bool isPacketEnd() const { return (packetEnd); };
void setPacketStart(bool Y) { packetStart = Y; };
void setPacketEnd(bool Y) { packetEnd = Y; };
void resetPacket() { setPacketStart(false); setPacketEnd(false); };
// Return the slots used by the insn.
unsigned getUnits(const HexagonTargetMachine* TM) const;
// Return the Hexagon ISA class for the insn.
unsigned getType() const;
void setDesc(const MCInstrDesc& mcid) { MCID = &mcid; };
const MCInstrDesc& getDesc(void) const { return *MCID; };
// Return whether the insn is an actual insn.
bool isCanon() const;
// Return whether the insn is a prefix.
bool isPrefix() const;
// Return whether the insn is solo, i.e., cannot be in a packet.
bool isSolo() const;
// Return whether the instruction needs to be constant extended.
bool isConstExtended() const;
// Return constant extended operand number.
unsigned short getCExtOpNum(void) const;
// Return whether the insn is a new-value consumer.
bool isNewValue() const;
// Return whether the instruction is a legal new-value producer.
bool hasNewValue() const;
// Return the operand that consumes or produces a new value.
const MCOperand& getNewValue() const;
// Return number of bits in the constant extended operand.
unsigned getBitCount(void) const;
private:
// Return whether the instruction must be always extended.
bool isExtended() const;
// Return true if the insn may be extended based on the operand value.
bool isExtendable() const;
// Return true if the operand can be constant extended.
bool isOperandExtended(const unsigned short OperandNum) const;
// Return the min value that a constant extendable operand can have
// without being extended.
int getMinValue() const;
// Return the max value that a constant extendable operand can have
// without being extended.
int getMaxValue() const;
};
}
#endif