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MASM : STACK : SSWAP
SSWAP:

Syntax:

  • SSWAP
Description:

SSWAP swaps the top of the stack, with the next-to-top level.

Stack before SSWAP:

High Bank Low Bank
A B Top
C D Next

Stack after SSWAP:

High Bank Low Bank
C D Top
A B Next

Note: A, B, C, D denote TRUE or FALSE.

Microcode Pattern:

Takes 1 cycles to execute.
    Example: SSWAP

	  
	STKC
	----
	SWP

	  
Exceptions :

No exceptions.

Example :

IPUSHEQ 255 3 0xa 0xb !! Pushes on both banks of the stack integer 
                      !! condition for equality

IPUSHEQ 255 3 0xc 0xd !! Pushes on both banks of the stack integer 
                      !! condition for equality

SSWAP                 !! Performs the SSWAP operation 
                      !! as described above

APE Group Zeuthen. 2003
$Id: sswap_masm.php,v 1.2 2004/08/04 09:45:22 noe Exp $
$Id: syntax.php,v 1.8 2004/08/04 09:25:34 noe Exp $