scale.backend.ppc
Class PPCAssembler

java.lang.Object
  scale.backend.Assembler
      scale.backend.ppc.PPCAssembler

public final class PPCAssembler
extends Assembler

This class generates PPC assembly language from a list of PPC instructions.

$Id: PPCAssembler.java,v 1.27 2007-10-04 19:57:55 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.Assembler

gen, hex, oneItemPerLine, repsAllowedInAL, source

Constructor Summary

PPCAssembler(Generator gen, java.lang.String source)

Method Summary

void	assembleComment(java.lang.String comment, Emit emit) Insert the assembler representation of the comment into the output stream.
long	assembleData(Emit emit, SpaceAllocation sa, long location) Called for each allocation in a named area.
void	assembleDataAreaHeader(Emit emit, int kind) Generate assembler directives for the start of a data area.
void	assembleEpilog(Emit emit) Called at the very end of generating assembly code.
void	assembleLabel(Label label, Emit emit) Generate a label in the assembly output.
void	assembleProlog(Emit emit) Called at the very beginning of generating assembly code.
java.lang.String	assembleRegister(int reg) Convert a register number into its assembly language form.
protected long	genData(Emit emit, int dt, Label lab, int reps, boolean aligned) Generate the data representation for address of the label.
protected long	genData(Emit emit, int dt, long[] data, int reps, boolean aligned) Generate the assembly representation of an array of long values.
protected long	genData(Emit emit, int dt, long data, int reps, boolean aligned) Generate the assembly representation of long integer value.
protected void	genDirective(Emit emit, int dt) Generate the assembly directive required for the type.
protected int	getDirectiveSize(int dt) Return the number of addressable units required for one value of the specified type.
java.lang.String	getDisplayString(char[] v, int start, int end) Convert a string to a form suitable for display.
java.lang.String	getLabelString(Label label) Return the String representing the label.

Methods inherited from class scale.backend.Assembler

assemble, assembleDataBegin, assembleDataEnd, assembleInstructions, genAsciiText, genBytes, genData, genData, genData, genData, genData, genData, genData, genData, genZeroFill, getName, getSourceLanguage, getSpaceAllocation, isFortran

Methods inherited from class java.lang.Object

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

Constructor Detail

PPCAssembler

public PPCAssembler(Generator gen,
                    java.lang.String source)

Parameters:

gen - is the instruction generator used to generate the instructions.

source - specifies the source program

Method Detail

assembleProlog

public void assembleProlog(Emit emit)

Called at the very beginning of generating assembly code. Generate assembler directives needed at the beginning of the assembly language file.

Specified by:

assembleProlog in class Assembler

assembleEpilog

public void assembleEpilog(Emit emit)

Called at the very end of generating assembly code. Generate assembler directives needed at the end of the assembly language file.

Specified by:

assembleEpilog in class Assembler

getLabelString

public java.lang.String getLabelString(Label label)

Return the String representing the label.

Specified by:

getLabelString in class Assembler

assembleComment

public void assembleComment(java.lang.String comment,
                            Emit emit)

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

Specified by:

assembleComment in class Assembler

assembleLabel

public void assembleLabel(Label label,
                          Emit emit)

Generate a label in the assembly output.

Specified by:

assembleLabel in class Assembler

assembleRegister

public java.lang.String assembleRegister(int reg)

Convert a register number into its assembly language form.

Specified by:

assembleRegister in class Assembler

assembleDataAreaHeader

public void assembleDataAreaHeader(Emit emit,
                                   int kind)

Generate assembler directives for the start of a data area.

Specified by:

assembleDataAreaHeader in class Assembler

Parameters:

kind - specifies the area kind

emit - is the output sink

assembleData

public long assembleData(Emit emit,
                         SpaceAllocation sa,
                         long location)

Description copied from class: Assembler

Called for each allocation in a named area.

Specified by:

assembleData in class Assembler

Parameters:

emit - is the output sink

sa - is the data space

location - is the current location

genDirective

protected void genDirective(Emit emit,
                            int dt)

Generate the assembly directive required for the type.

Specified by:

genDirective in class Assembler

Parameters:

dt - - the data type

emit - specifies where to put the directive.

See Also:

SpaceAllocation

getDirectiveSize

protected int getDirectiveSize(int dt)

Return the number of addressable units required for one value of the specified type.

Specified by:

getDirectiveSize in class Assembler

Parameters:

dt - - the data type

See Also:

SpaceAllocation

genData

protected long genData(Emit emit,
                       int dt,
                       Label lab,
                       int reps,
                       boolean aligned)

Generate the data representation for address of the label.

Specified by:

genData in class Assembler

Parameters:

emit - specifies where to generate the data

dt - specifies the data type

lab - is the label

reps - specifies how many times to generate the representation

aligned - specifies whether the data will be aligned

Returns:

the number of bytes generated

See Also:

SpaceAllocation

genData

protected long genData(Emit emit,
                       int dt,
                       long data,
                       int reps,
                       boolean aligned)

Generate the assembly representation of long integer value.

Overrides:

genData in class Assembler

Parameters:

emit - specifies where to generate the data

dt - specifies the data type

data - specifies the value

reps - specifies how many times to generate the representation

aligned - specifies whether the data will be aligned

Returns:

the number of bytes generated

See Also:

SpaceAllocation

genData

protected long genData(Emit emit,
                       int dt,
                       long[] data,
                       int reps,
                       boolean aligned)

Generate the assembly representation of an array of long values.

Overrides:

genData in class Assembler

Parameters:

emit - specifies where to generate the data

dt - specifies the data type

data - specifies the values

reps - specifies how many times to generate the representation

aligned - specifies whether the data will be aligned

Returns:

the number of bytes generated

See Also:

SpaceAllocation

getDisplayString

public java.lang.String getDisplayString(char[] v,
                                         int start,
                                         int end)

Convert a string to a form suitable for display. For example, a double quote (") is converted to "\"" and "\0" is converted to "\\000".

Overrides:

getDisplayString in class Assembler

Parameters:

v - the original string

Returns:

the converted string