Zilog ZUSBOPTS - Manual (Page 273)

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.
IF
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

.
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.
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.

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.
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.
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.
ELIF ABC ; XYZ=3 and ABC is not 0,

.
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.
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.
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.

Note: