Zilog ZUSBOPTS - Manual (Page 280)

Source Language Syntax UM017105-0511
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Zilog Developer Studio II – ZNEO™
User Manual
•
The space of the segment in which the label is defined.
•
The space provided in the EXTERN or XREF directive.
•
If no space is provided with the EXTERN or XREF directive, the space check is not per-
formed on the label.
Source Language Syntax
The syntax description that follows is offered here to outline the general assembler syntax.
It does not define assembly language instructions.
<source_line> →
→
→
→
→ <if_statement>
[<Label_field>]<instruction_field><EOL>
[<Label_field>]<directive_field><EOL>
<Label_field><EOL>
<EOL>
<if_statement> →
→
→ <if_section>
[<else_statement>]
ENDIF
<if_section> → <if_conditional>
<code-body>
<if_conditional> →
IF <cond_expression>|

IFDEF <ident>|

IFSAME <string_const>,<string_const>|

IFMA <int_const>
<else_statement> →
ELSE <code_body>|

ELIF <cond_expression>

<code_body>

[<else_statement>]
<cond_expression> → <expression>|

<expression><relop><expression>
<relop> →
== | < | > | <= | => | !=
<code_body> → <source_line>@
<label_field> → <ident>:
<instruction_field> → <mnemonic>[<operand>]@
<directive_field> → <directive>
<mnemonic> → valid instruction mnemonic
<operand> →
→ <addressing_mode>
<expression>
<addressing_mode> → valid instruction addressing mode