Zilog Z8F0130 - Manual (Page 350)

Using the Macro Assembler UM013037-1212
326
Zilog Developer Studio II – Z8 Encore!
User Manual
•
IFSAME – see page 328
•
IFMA – see page 328
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Any symbol used in a conditional directive must be previously defined by an EQU or VAR
directive. Relational operators can be used in the expression. Relational expressions eval-
uate to 1 if true, and 0 if false.
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, $.IF , .$if , .IFTRUE
Syntax
IF [<cond_expression> <code_body>]
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[ ELIF <cond_expression> <code_body>]
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[ ELSE <code_body>]
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ENDIF
Example
IF XYZ ; process code body 0 if XYZ is not 0
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.
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.
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.
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.
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.
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ENDIF
IF XYZ !=3 ; process code body 1 if XYZ is not 3
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.
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.
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.
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Note: