scale.backend.ppc
Class BFormInstruction

java.lang.Object
  scale.backend.Instruction
      scale.backend.Branch
          scale.backend.ppc.PPCBranch
              scale.backend.ppc.BFormInstruction

All Implemented Interfaces:

java.lang.Cloneable

public class BFormInstruction
extends PPCBranch

This class represents Sparc calPowerPC I-form instructions.

$Id: BFormInstruction.java,v 1.8 2007-10-04 19:57:54 burrill Exp $

Copyright 2007 by the Scale Compiler Group,
Department of Computer Science
University of Massachusetts,
Amherst MA. 01003, USA
All Rights Reserved.

Field Summary

Fields inherited from class scale.backend.ppc.PPCBranch

opcode, pt

Constructor Summary

BFormInstruction(int opcode, int bo, int bi, Displacement displacement, int numTargets)
Create a branch relative that does not set the link register.

BFormInstruction(int opcode, int bo, int bi, Displacement displacement, int numTargets, boolean absolute, boolean link)

BFormInstruction(int opcode, int bo, int bi, int numTargets)

Method Summary

void	assembler(Assembler asm, Emit emit) Insert the assembler representation of the instruction into the output stream.
boolean	independent(Instruction inst, RegisterSet registers) Return true if this instruction is independent of the specified instruction.
java.lang.String	toString()

Methods inherited from class scale.backend.ppc.PPCBranch

assembleDisp, canBeAnnulled, canBeDeleted, getOpcode, getPt, instructionSize, isUnconditional, setOpcode

Methods inherited from class scale.backend.Branch

additionalRegsKilled, additionalRegsSet, additionalRegsUsed, addTarget, copy, defs, getBranchProbability, getExecutionCycles, getRegsKilled, getTarget, isBranch, isCall, markAsCall, mods, nullify, numTargets, remapDestRegister, remapRegisters, remapSrcRegister, setBranchProbability, specifyRegisterUsage, uses, uses

Methods inherited from class scale.backend.Instruction

clone, ehash, getBBID, getCopyDest, getCopySrc, getDestRegister, getFunctionalUnit, getLoopNumber, getNext, getPredicate, getPredicates, getSrcRegisters, getTag, isCopy, isLabel, isLoad, isMandatory, isMarker, isPhi, isPredicated, isPredicatedOnTrue, isPrefetch, isSpillInstruction, isSpillLoadPoint, isSpillStorePoint, isStore, markSpillInstruction, nullified, numPredicates, removePredicates, setBBID, setLoopNumber, setMandatory, setNext, setPredicate, setPredicate, setPredicatedOnTrue, setPredicates, setsSpecialReg, setTag, specifyNotSpillLoadPoint, specifySpillStorePoint

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

BFormInstruction

public BFormInstruction(int opcode,
                        int bo,
                        int bi,
                        int numTargets)

BFormInstruction

public BFormInstruction(int opcode,
                        int bo,
                        int bi,
                        Displacement displacement,
                        int numTargets)

Create a branch relative that does not set the link register.

Parameters:

displacement - is the branch address

numTargets - specifies where the number of branch targets

BFormInstruction

public BFormInstruction(int opcode,
                        int bo,
                        int bi,
                        Displacement displacement,
                        int numTargets,
                        boolean absolute,
                        boolean link)

Parameters:

bo - specifies the bo field of the instruction

bi - specifies the bi field of the instruction

displacement - is the branch address

numTargets - specifies where the number of branch targets

absolute - is true if the displacement represents an absolute address

link - is true if this instruction sets the link register

Method Detail

independent

public boolean independent(Instruction inst,
                           RegisterSet registers)

Return true if this instruction is independent of the specified instruction. If instructions are independent, than one instruction can be moved before or after the other instruction without changing the semantics of the program.

Overrides:

independent in class Branch

Parameters:

inst - is the specified instruction

assembler

public void assembler(Assembler asm,
                      Emit emit)

Insert the assembler representation of the instruction into the output stream.

Specified by:

assembler in class Instruction

toString

public java.lang.String toString()

Overrides:

toString in class Branch