|
Test
Your EQ #146— Answer
|
Answer
7
In assembly language, the
if-then becomes a series of instructions ending in a conditional
jump. Note that the condition of this jump is the opposite
of what the boolean expression would imply, because this
instruction is jumping to the "else" clause if the expression
is false.
The
"else" keyword marks the end of the "then" clause, and
it becomes an unconditional jump to the "endif", followed
by the target label for the conditional jump instruction
above.
Finally,
the "endif" keyword becomes the target label for the unconditional
jump. These relationships are shown below.
if (expression) then
.
. statements executed
. if (expression) true
.
else
.
. statements executed
. if (expression) false
.
endif
|
; code to evaluate
; (expression)
jump if false to labelA
;
; code executed if
; (expression) true
;
jump to labelB
labelA:
;
; code executed if
; (expression) false
;
labelB:
|
Contributor:
Dave Tweed
Published: September-2002
