Class SVM_COMPARE

java.lang.Object

svm.instruction.SVM_Instruction

svm.instruction.SVM_COMPARE

public class SVM_COMPARE
extends SVM_Instruction

SVM-INSTRUCTION: COMPARE relation

relation ::= ?lt | ?le | ?eq | ?ge | ?gt | ?ne

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

The 'tos' and 'sos' are popped off the Runtime stack.
The 'result' is calculated as result = sos relation tos.
Then the boolean 'result' is pushed onto the Runtime Stack.

'tos' and 'sos' must be of the same arithmetic type, i.e. int, float or double,
or boolean, in which case: relation ::= ?eq | ?ne

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

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

Constructor	Description
SVM_COMPARE(Relation relation)	Construct a new SVM_CALL_COMPARE instruction

Method Summary

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

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

Constructor Details

SVM_COMPARE

public SVM_COMPARE(Relation relation)

Construct a new SVM_CALL_COMPARE instruction

Parameters:

relation - the relation

Method Details

execute

public void execute()

Description copied from class: SVM_Instruction

Execute this SVM instruction

Overrides:

execute in class SVM_Instruction

toString

public String toString()

Overrides:

toString in class Object

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_Instruction

Parameters:

oupt - the output stream

Throws:

IOException - if IOException occur

read

public static SVM_Instruction read(AttributeInputStream inpt)
                            throws IOException

Reads an SVM_COMPARE instruction from the given input.

Parameters:

inpt - the input stream

Returns:

the SVM_COMPERE instruction read

Throws:

IOException - if IOException occur