Control flow instructions

Control flow instructions in the virtual processor's assembly language guide the program's execution flow.

goto instruction

• Syntax: goto label1
• Binary code: 0000 1000 0101 0110 (Op code: 0 0001)
• Usage: Unconditionally jumps to the specified label.
• Error check: Confirm label existence.

call instruction

• Syntax: call label1
• Binary code: 0001 0000 0101 0110 (Op code: 00010)
• Usage: Calls a subroutine at label1.
• Error check: Verify label existence.

ret instruction

• Syntax: ret
• Binary code: 1011 0000 0000 0000 (Op code: 1 0110)
• Usage: Returns from a subroutine.
• Error check: Use only after a call instruction.

Examples

1. Using goto:

   goto mainLoop   ; Jumps to the label 'mainLoop'
   

2. Calling a subroutine:

   call computeValue  ; Calls the subroutine 'computeValue'
   

3. Returning from a subroutine:

   ret  ; Returns control to the point after the last call