Repeat structured assembly block inputs – Zilog Z8F0130 User Manual
Page 345
UM013037-1212
Structured Assembly Inputs
Zilog Developer Studio II – Z8 Encore!
User Manual
321
•
The
.$ELSEIF
and
.$ELSE
assembler directives can only appear between enclosing
.$IF
and
.$ENDIF
directives. It is not valid for the
.$ELSEIF
and
.$ELSE
direc-
tives to appear in any other context.
•
The
.$ELSE
directive does not have any parameters.
•
The
.$ENDIF
directive does not have any parameters.
•
None of the
.$IF
,
.$ELSEIF
,
.$ELSE
, and
.$ENDIF
assembler directives can be
labeled. If a label is specified, a warning message is issued, and the label is discarded.
REPEAT Structured Assembly Block Inputs
The
.$REPEAT
,
.$BREAK
,
.$CONTINUE
, and
.$UNTIL
assembler directives are used to
test execution-time conditions and conditionally execute object code based on the results
of the test.
Syntax
.$REPEAT
[; comment]
statements
[
.$BREAK
[ .$IF condition2 ] [; comment ] ]
[ statements ]
[
.$CONTINUE
[ .$IF condition3 ] [; comment ] ]
[ statements ]
.$UNTIL
condition1 [; comment ]
The following qualifications elaborate the syntax and semantics of the structured assembly
test directives. Unless otherwise specified, violations of these qualifications cause the
assembly to fail.
•
The
.$REPEAT
and
.$UNTIL
assembler directives must be specified in that order.
•
The
.$BREAK
assembler directive is optional. It can be specified an arbitrary number
of times between the
.$REPEAT
and
.$UNTIL
assembler directives.
•
The
.$CONTINUE
assembler directive is optional. It can be specified an arbitrary
number of times between the
.$REPEAT
and
.$UNTIL
directives.
•
Any valid assembler statement can appear in the statements sections of the structured
assembly test directives. This means, among other things, that structured assembly test
directives can be nested. The structured assembly test directives can be nested up to
255 levels.
•
Nested
.$BREAK
and
.$CONTINUE
directives are associated with the most recent
.$REPEAT
directive.
•
There is no preset limit on the number of statements that can appear in the statements
sections; there can be any number of assembler statements in each statements section,
including zero. The operating system file system might impose limitations on file
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