dspl.intermediate.instructions
Class CCallInstruction

java.lang.Object
  dspl.intermediate.instructions.Instruction
      dspl.intermediate.instructions.CCallInstruction

public class CCallInstruction
extends Instruction

CCallInstruction is the insrtuction used for invoking external *presumably c-compiled* functions. Syntax: "ccall printf("hello %s\n", str1); printf is the function name "hello %s\n" and str1 are the two parameters

Author:

David

Field Summary

java.lang.String	funcName
java.util.ArrayList	parameters

Fields inherited from class dspl.intermediate.instructions.Instruction

INST_TYPE_ARITHMATIC, INST_TYPE_BRANCH, INST_TYPE_CCALL, INST_TYPE_FORLOOP, lastInstruction, nextInstruction, prevInstruction

Constructor Summary

CCallInstruction(java.lang.String funcName)
Constructor for CCallInstruction
Takes the function name to call

Method Summary

void	addParameter(Variable v) Adds a parameter to be passed (by pushing on the stack) to the function to be called
int	getInstType()
Variable[]	getParameters() Returns an arra of the parameters to be pased to the function.
boolean	usesVariable(Variable v) Designed to be a recursive call to see if a given variable is used anymore within a code block, after the current instruction.

Methods inherited from class dspl.intermediate.instructions.Instruction

setNextInstruction

Methods inherited from class java.lang.Object

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

Field Detail

funcName

public java.lang.String funcName

parameters

public java.util.ArrayList parameters

Constructor Detail

CCallInstruction

public CCallInstruction(java.lang.String funcName)

Constructor for CCallInstruction
Takes the function name to call

Parameters:

funcName -

Method Detail

addParameter

public void addParameter(Variable v)

Adds a parameter to be passed (by pushing on the stack) to the function to be called

Parameters:

v - the variable to be pushed onto the stack

getParameters

public Variable[] getParameters()

Returns an arra of the parameters to be pased to the function. Assumed that parameters were added IN ORDER

Returns:

usesVariable

public boolean usesVariable(Variable v)

Description copied from class: Instruction

Designed to be a recursive call to see if a given variable is used anymore within a code block, after the current instruction. Intention is to allow a way to parse the Instruction tree to see if a specific variable is used again. NOTE: may not be necessary, or may need to be augmented to return a value indicating how far away from the current instruction will it be used again if desire to perform better register allocation.

Specified by:

usesVariable in class Instruction

Parameters:

v - the variable to search for to see if it is used

Returns:

getInstType

public int getInstType()

Specified by:

getInstType in class Instruction

Returns:

the instruction type of this instruction