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MiniRobotLanguage (MRL)

 

JLE. Conditional Jump

Jump on Less or Equal

 

 

Intention

 

This command can be used to test a Variable for being "less or eqal"  against another variable, formula or value.

 

Additionally the Command allows a "post-decrement" or alternatively a "post-increment" for easy Loop-Constructions. "Post-increment" will increment the given variable after the test inside the variable was done. This can be used to construct simple Loops.

Here is an example with "Post-increment":

 

' Start-value

: §§NUM=1

: §§TAR=5

: §§LAB=lop

:lop

PRT.§§NUM

' 5 is the Loop-End

JLE.§§NUM>§§TAR|§§LAB

DMP.

MBX.!

END.

 

If you switch variables P1 and P2 you can test for "bigger then".

 

The command can be switched from default mode (Jump Mode)  into "Gosub Mode" if you prefix the Label-Parameter P3 with a colon. Here is an example:

 

JLE. is the counterpart to JME. - Jump on More or Equal.

 

 

 

 

Syntax

 

JLE.P1P2P3|P4

 

 

Parameter Explanation

 

P1 -  must be variable

 

P2 - can be an

   > increment-operator

   < decrement operator or

   | (Pipe Symbol) if no change of the value should happen

 

P3 - variable or formula* in (..) or numeric value

 

P4 - Label or Variable that evaluates to a Label.

         If it starts with a ":" (colon) a JSR. - Jump SubRoutine (Label) (GOSUB like)

        Jump is done instead of the normal JMP. - Jump to Label (GOTO like) Jump..

 

*In case of JLE. the formula must never contain any of the possible Sign-Operator (P2) or else the command may not be properly interpreted.

 

 

Example

 

'*************************************

' Simple JLE - Example

'*************************************

' Start-value

VAR.§§NUM=1

:lop

PRT.§§NUM

' 5 is the Loop-End

' > makes an post-increment to §§NUM

JLE.§§NUM>5|lop

DMP.

MBX.!

END.

 

 

'*************************************

' Another JLE - Loop-Example

' using variables

'*************************************

' Start-value

: §§NUM=1

: §§TAR=5

: §§LAB=lop

:lop

PRT.§§NUM

' 5 is the Loop-End

JLE.§§NUM>§§TAR|§§LAB

DMP.

MBX.!

END.

 

'*************************************

' Another JLE - Loop-Example

' using variables and a formula

'*************************************

' Start-value

: §§NUM=1

: §§TAR=5

: §§LAB=lop

:lop

PRT.§§NUM

' 5 is the Loop-End

JLE.§§NUM>(§§TAR+1)|§§LAB

DMP.

MBX.!

END.

 

 

Remarks

 

-

 

 

 

Limitations:

 

-

 

 

See also:

 

 

•     JIV. - Jump-If-Variable

•     JIZ. - Jump-If-Zero

•     JIN. - Jump if Not zero

•     JOR. - Jump On Repeat-Count

•     JME. - Jump on More or Equal

•     JLE. - Jump on Less or Equal

•     JMP. - Jump to Label

•     JSR. - Jump SubRoutine (Label)