Anonymous Labels for Jump Instructions

ID: Q33067

The information in this article applies to:

Microsoft Macro Assembler for MS-DOS, versions 5.1, 5.1a, 6.0, 6.0a, 6.0b
Microsoft Macro Assembler for OS/2, versions 5.1, 5.1a, 6.0, 6.0a, 6.0b

SUMMARY

The Microsoft Macro Assembler (MASM) 5.1 and later provides a way to generate anonymous labels for jump instructions. To define the local label to be jumped to, use two at signs (@@) followed by a colon (:). The operand used in the jump instruction can be one of the following


   @B (back)
   @F (forward)

The @B will jump to the previous local label and the @F will jump to the next local label.

MORE INFORMATION

The fragment below illustrates this feature:


    cmp ax,cx
    jge @F
    .
    .
    .
@@:
    .
    .
    .
    jle @B

The jump to @F will jump to @@: and the jump to @B will jump back to the @@.

Additional query words: kbinf 5.10 5.10a 6.00 6.00a 6.00b jmp

Keywords :
Version : :5.1,5.1a,6.0,6.0a,6.0b
Platform :
Issue type :