Anonymous Labels for Jump Instructions

 Last reviewed: January 23, 1995
Article ID: Q33067
The information in this article applies to:
  • Microsoft Macro Assembler for MS-DOS, versions 5.1, 5.1a, 6.0, 6.0a, and 6.0b
  • Microsoft Macro Assembler for OS/2, versions 5.1, 5.1a, 6.0, 6.0a, and 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 reference words: kbinf 5.10 5.10a 6.00 6.00a 6.00b jmp
KBCategory: kbprg
KBSubCategory: MASMLngIss

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Last reviewed: January 23, 1995
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