edu.polytechnique.xvm.asm.opcodes

Class RET

java.lang.Object

edu.polytechnique.xvm.asm.interfaces.AsmInstruction

edu.polytechnique.xvm.asm.opcodes.RET

public final class RET
extends AsmInstruction

Return from a subroutine

Suppose oldFP is the value of FP before the instruction is executed.

• Stack before: w1 ; ... ; wSP-oldFP-2 ; p ; f ; S
• Stack after: S
• PC: changes to p
• SP: changes to oldFP
• FP: changes to f
• R: unchanged
• Exceptions:
  • Stack underflow: SP - oldFP < 2
  • Int mismatch: at least one of p or f is not an integer
  • Invalid PC: the instruction position p does not exist

See Also:

GSB

Constructor Summary

Constructors

Constructor and Description
RET()

Method Summary

Modifier and Type	Method and Description
<P,R> R	accept(AsmVisitor<P,R> visitor, P arg)

Methods inherited from class edu.polytechnique.xvm.asm.interfaces.AsmInstruction

getName, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

RET

public RET()

Method Detail

accept

public <P,R> R accept(AsmVisitor<P,R> visitor,
                      P arg)

Specified by:

accept in class AsmInstruction