Zilog ZUSBOPTS Manual do Utilizador descarregar pdf (Página 273)

100

101

UM017105-0511 Conditional Assembly

Zilog Developer Studio II – ZNEO™

User Manual

245

If a condition is true, the code body is processed. Otherwise, the code body after an ELSE

is processed, if included.

The

ELIF directive allows a case-like structure to be implemented.

Conditional assembly can be nested.

Evaluates a Boolean expression. If the expression evaluates to 0, the result is false; other-

wise, the result is true.

Synonyms

.if, .IF, IFN, IFNZ, COND, IFTRUE, IFNFALSE, .IFTRUE

Syntax

IF [<cond_expression> <code_body>]

[

ELIF <cond_expression> <code_body>]

[

ELSE <code_body>]

ENDIF

Example

IF XYZ ; process code body if XYZ is not 0

.

<Code Body>

.

ENDIF

IF XYZ !=3 ; code body 1 if XYZ is not 3

.

<Code Body 1>

.

ELIF ABC ; XYZ=3 and ABC is not 0,

.

<Code Body 2>

.

Note:

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