Texas Instruments TMS320C3 Series, User Manual, Page: 92 / 166

Directives That Enable Conditional Assembly
6-10
6.5 Directives That Enable Conditional Assembly
Conditional assembly directives enable you to instruct the assembler to as-
semble certain sections of code according to a true or false evaluation of an
expression. Two sets of directives allow you to assemble conditional blocks of
code:
-
The .if/.else/.endif directives tell the assembler to assemble a block of
code according to a true or false evaluation of an expression. Note that you
cannot nest if statements.
.if
well-defined expression
marks the beginning of a conditional
block and assembles code if the .if
well-
defined expression is true.
.else marks a block of code to be assembled
if the .if
well-defined expression is
false.
.endif marks the end of a conditional block
and terminates the block.
-
The .loop /.break /.endloop directives tell the assembler to repeatedly as-
semble a block of code according to the evaluation of an expression.
.loop
well-defined expression
marks the beginning a repeatable
block of code. The optional expression
evaluates to the loop count.
.endloop marks the end of a repeatable block.