at.dms.kjc.spacetime
Class InterSliceBuffer

java.lang.Object
  at.dms.kjc.backendSupport.Channel
      at.dms.kjc.spacetime.OffChipBuffer
          at.dms.kjc.spacetime.InterSliceBuffer

public class InterSliceBuffer
extends OffChipBuffer

This class represents a buffer between two traces. The rotating register abstraction is implemented by have rotating buffers, so we can actually have many physical buffers for each buffer.

Author:

mgordon

Field Summary

protected static HashMap<StreamingDram,Integer>	dramsToBuffers A map of StreamingDrams to the number of InterTraceBuffers mapped to it.
protected InterSliceEdge	edge

Fields inherited from class at.dms.kjc.spacetime.OffChipBuffer

dram, owner, sizeSteady

Fields inherited from class at.dms.kjc.backendSupport.Channel

bufferStore, extraCount, ident, rotationLength, theEdge, unique_id

Constructor Summary

protected

InterSliceBuffer(InterSliceEdge edge)

Method Summary

protected void	calculateSize()
static InterSliceBuffer	getBuffer(InterSliceEdge edge)
InterSliceEdge	getEdge()
OffChipBuffer	getNonRedundant() if this buffer is redundant return the first upstream buffer that is not redundant, return null if this is a input->filter buffer with no input or a filter->output buffer with no output
int	getNumInterTraceBuffers(StreamingDram dram)
boolean	redundant()

Methods inherited from class at.dms.kjc.spacetime.OffChipBuffer

areAllAssigned, getDRAM, getIdent, getIdent, getIdent, getOwner, getRotationLength, getSize, isAssigned, isInterSlice, isIntraSlice, resetDRAMAssignment, setDRAM, setRotationLengths, toString, totalBufferSizeInBytes, unnecessary, unnecessary, unsetDRAM

Methods inherited from class at.dms.kjc.backendSupport.Channel

addChannel, assignFromPeekMethod, assignFromPeekMethodName, assignFromPopMethod, assignFromPopMethodName, beginInitRead, beginInitWrite, beginSteadyRead, beginSteadyWrite, dataDecls, dataDeclsH, endInitRead, endInitWrite, endSteadyRead, endSteadyWrite, findChannel, getBuffers, getDest, getExtraCount, getSource, getType, peekMethod, peekMethodName, popManyMethod, popManyMethodName, popMethod, popMethodName, postPreworkInitRead, printBuffers, pushMethod, pushMethodName, readDecls, readDeclsExtern, reset, setExtralength, topOfWorkSteadyRead, topOfWorkSteadyWrite, writeDecls, writeDeclsExtern

Methods inherited from class java.lang.Object

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

Field Detail

edge

protected InterSliceEdge edge

dramsToBuffers

protected static HashMap<StreamingDram,Integer> dramsToBuffers

A map of StreamingDrams to the number of InterTraceBuffers mapped to it. StreamingDram->Integer

Constructor Detail

InterSliceBuffer

protected InterSliceBuffer(InterSliceEdge edge)

Method Detail

getBuffer

public static InterSliceBuffer getBuffer(InterSliceEdge edge)

redundant

public boolean redundant()

Specified by:

redundant in class OffChipBuffer

Returns:

True of this buffer is not used because the output intrattracebuffer of the source trace performs its function.

getNonRedundant

public OffChipBuffer getNonRedundant()

Description copied from class: OffChipBuffer

if this buffer is redundant return the first upstream buffer that is not redundant, return null if this is a input->filter buffer with no input or a filter->output buffer with no output

Specified by:

getNonRedundant in class OffChipBuffer

calculateSize

protected void calculateSize()

Specified by:

calculateSize in class OffChipBuffer

getEdge

public InterSliceEdge getEdge()

getNumInterTraceBuffers

public int getNumInterTraceBuffers(StreamingDram dram)

Parameters:

dram -

Returns:

The number of intertracebuffer's mapped to

dram

. Used because each dram can at handle at most StreamingDram.STREAMING_QUEUE_SIZE number of reads and writes.