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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
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* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package com.sun.c1x.lir;
import com.sun.c1x.util.*;
import com.sun.cri.ci.*;
/**
* The {@code LIROp1} class definition. The LIROp1 instruction has only one input operand.
*/
public class LIROp1 extends LIRInstruction {
public enum LIRMoveKind {
Normal, Volatile, Unaligned
}
public final CiKind kind; // the operand type
public final LIRMoveKind moveKind; // flag that indicate the kind of move
/**
* Constructs a new LIROp1 instruction.
*
* @param opcode the instruction's opcode
* @param opr the first input operand
* @param result the operand that holds the result of this instruction
* @param kind the kind of this instruction
* @param info the object holding information needed to emit debug information
*/
public LIROp1(LIROpcode opcode, CiValue opr, CiValue result, CiKind kind, LIRDebugInfo info) {
super(opcode, result, info, false, 0, 0, opr);
this.kind = kind;
this.moveKind = LIRMoveKind.Normal;
assert isInRange(opcode, LIROpcode.BeginOp1, LIROpcode.EndOp1) : "The " + opcode + " is not a valid LIROp1 opcode";
}
/**
* Constructs a new LIROp1 instruction.
*
* @param opcode the instruction's opcode
* @param opr the first input operand
* @param result the operand that holds the result of this instruction
* @param kind the kind of this instruction
*/
public LIROp1(LIROpcode opcode, CiValue opr, CiValue result, CiKind kind) {
this(opcode, opr, result, kind, null);
}
/**
* Constructs a new LIROp1 instruction.
*
* @param opcode the instruction's opcode
* @param opr the first input operand
* @param result the operand that holds the result of this instruction
*/
public LIROp1(LIROpcode opcode, CiValue opr, CiValue result) {
this(opcode, opr, result, CiKind.Illegal);
}
/**
* Constructs a new LIROp1 instruction.
*
* @param opcode the instruction's opcode
* @param opr the first input operand
*/
public LIROp1(LIROpcode opcode, CiValue opr) {
this(opcode, opr, CiValue.IllegalValue);
}
/**
* Constructs a new LIROp1 instruction.
*
* @param moveKind the kind of move the instruction represents
* @param operand the single input operand
* @param result the operand that holds the result of this instruction
* @param kind the kind of this instruction
* @param info the object holding information needed to emit debug information
*/
public LIROp1(LIRMoveKind moveKind, CiValue operand, CiValue result, CiKind kind, LIRDebugInfo info) {
super(LIROpcode.Move, result, info, false, 0, 0, operand);
this.kind = kind;
this.moveKind = moveKind;
}
/**
* Constructs a new LIROp1 instruction.
*
* @param opcode the instruction's opcode
* @param opr the first input operand
* @param info the object holding information needed to emit debug information
*/
public LIROp1(LIROpcode opcode, CiValue opr, LIRDebugInfo info) {
super(opcode, CiValue.IllegalValue, info, false, 0, 0, opr);
this.kind = CiKind.Illegal;
this.moveKind = LIRMoveKind.Normal;
assert isInRange(opcode, LIROpcode.BeginOp1, LIROpcode.EndOp1) : "The " + opcode + " is not a valid LIROp1 opcode";
}
/**
* Gets the input operand of this instruction.
*
* @return opr the input operand.
*/
public CiValue operand() {
return operand(0);
}
/**
* Gets the kind of move of this instruction.
*
* @return flags the constant that represents the move kind.
*/
public LIRMoveKind moveKind() {
assert code == LIROpcode.Move : "The opcode must be of type LIROpcode.Move in LIROp1";
return moveKind;
}
@Override
public void emitCode(LIRAssembler masm) {
masm.emitOp1(this);
}
@Override
public String name() {
if (code == LIROpcode.Move) {
switch (moveKind()) {
case Normal:
return "move";
case Unaligned:
return "unaligned move";
case Volatile:
return "volatile_move";
default:
throw Util.shouldNotReachHere();
}
} else {
return super.name();
}
}
@Override
public boolean verify() {
switch (code) {
case Move:
assert (operand().isLegal()) && (result().isLegal()) : "Operand and result must be valid in a LIROp1 move instruction.";
break;
case NullCheck:
assert operand().isVariableOrRegister() : "Operand must be a register in a LIROp1 null check instruction.";
break;
case Return:
assert operand().isVariableOrRegister() || operand().isIllegal() : "Operand must be (register | illegal) in a LIROp1 return instruction.";
break;
}
return true;
}
}