Chapter 10 Writing Assembler Control Statements
Conditional Assembly 203
Usage example
A source file that uses #ifb is shown below. If the dummy parameter para to the macro debug is a null
character, the program will execute next_cycle. If it is not a null character, the program will execute
test and then execute next_cycle. In this example, the identifier MODE is passed to the macro debug.
When a replacement string has been specified, the call is without a null character.
global check proc
;
debug macro string
#ifb string
jsr check
jsr proc
#else
jsr proc
#endif
endm
;
_TEXT section CODE, PUBLIC,
1
#define MODE debug_on
debug MODE
#undef MODE
#define MODE
debug MODE
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