Class SVM_JUMPIF

java.lang.Object

svm.instruction.SVM_Instruction

svm.instruction.SVM_JUMP

svm.instruction.SVM_JUMPIF

public class SVM_JUMPIF
extends SVM_JUMP

SVM-INSTRUCTION: JUMPIF relation size paddr

Runtime Stack
   ..., sos, tos →
   ...

The 'tos' and 'sos' are popped off the Runtime stack. The 'result' is calculated as result = sos relation tos. Note: Both 'tos' abd 'sos' may be multi-sized.

Conditional Jump to paddr.

A conditional jump is executed, branching only if the relation evaluates true. Ie. The Program Sequence Control PCS := paddr otherwise PCS is incremented by one.

Link to GitHub: Source File.

Author:

S-Port: Definition of S-code, Øystein Myhre Andersen

Field Summary

Fields

Modifier and Type	Field	Description
private final Relation	relation	The relation
private final int	size	The test value size

Fields inherited from class SVM_JUMP

destination

Fields inherited from class SVM_Instruction

iADD, iADDREG, iAND, iASSIGN, iCALL, iCALLSYS, iCOMPARE, iCONVERT, iDECO, iDIST, iDIV, iDUP, iENTER, iEQV, iGETO, iGOTO, iIMP, iINCO, iINITO, iJUMP, iJUMPIF, iLINE, iLOAD, iLOADA, iMax, iMULT, iNEG, iNOOP, iNOT, iOR, iPOPK, iPRECALL, iPUSHC, iPUSHLEN, iPUSHR, iREM, iRESTORE, iRETURN, iSAVE, iSETO, iSHIFT, iSTORE, iSUB, iSWITCH, iXOR, opcode

Constructor Summary

Constructors

Modifier	Constructor	Description
	SVM_JUMPIF(Relation relation, int size, ProgramAddress destination)	Construct a new SVM_JUMP instruction
private	SVM_JUMPIF(AttributeInputStream inpt)	Construct an SVM_JUMPIF instruction from the given input.

Method Summary

Modifier and Type	Method	Description
void	execute()	Execute this SVM instruction
static SVM_Instruction	read(AttributeInputStream inpt)	Reads an SVM_JUMPIF instruction from the given input.
String	toString()
void	write(AttributeOutputStream oupt)	Write this SVM instruction to the given output.

Methods inherited from class SVM_JUMP

setDestination

Methods inherited from class SVM_Instruction

edOpcode, readObject

Methods inherited from class Object

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

Field Details

relation

private final Relation relation

The relation

size

private final int size

The test value size

Constructor Details

SVM_JUMPIF

public SVM_JUMPIF(Relation relation,
 int size,
 ProgramAddress destination)

Construct a new SVM_JUMP instruction

Parameters:

relation - the relation

size - the test value size

destination - the jump destination address

SVM_JUMPIF

private SVM_JUMPIF(AttributeInputStream inpt)
            throws IOException

Construct an SVM_JUMPIF instruction from the given input.

Parameters:

inpt - the input stream

Throws:

IOException - if IOException occur

Method Details

execute

public void execute()

Description copied from class: SVM_Instruction

Execute this SVM instruction

Overrides:

execute in class SVM_JUMP

toString

public String toString()

Overrides:

toString in class SVM_JUMP

write

public void write(AttributeOutputStream oupt)
           throws IOException

Description copied from class: SVM_Instruction

Write this SVM instruction to the given output.

Overrides:

write in class SVM_JUMP

Parameters:

oupt - the output stream

Throws:

IOException - if IOException occur

read

public static SVM_Instruction read(AttributeInputStream inpt)
                            throws IOException

Reads an SVM_JUMPIF instruction from the given input.

Parameters:

inpt - the input stream

Returns:

the SVM_JUMPIF instruction read

Throws:

IOException - if IOException occur