MIPS Tutorial 28 Printing an Array with a While Loop Video Lecture | MIPS Assembly Programming Simplified - Electronics and Communication Engineering (ECE)

hello guys this is a male and welcome
back to another awesome tutorial about
MIPS assembly language programming in
this tutorial well our fuel' I'm very
excited because I want to talk to you
about while loops and arrays so while
loops in the race they go hand-in-hand
because as you know arrays have multiple
values and while loops are very good at
handling multiple values like because
they allow you to do repetition you can
actually manipulate arrays in very
concise manner in a very concise manner
so last time I taught you how you can
actually store values to random access
memory and how you can declare an array
and then you have the index and actually
how you can actually store the values at
the location that you specified by the
index so 0 first location you add 4 is
the second location
you have 4 more then it's going to be
the third location so right now we have
these through these three numbers array
Sub Zero has for array sub one has the
value of 10 and the third element has 12
so I want to show you a way to actually
use a loop so that you can print all the
values in the array so how can we do
this well first of all let's make a
while loop give it a name and you also
need the exit label and we need the
index so we have to clear to 0 clear the
design T 0 because we need an index
right so to 0 so an immediate data
scientist 0 comma tell assign 0 comma 0
so T 0 is now the index and it's clear
so we need a condition write the
condition is going to be the following
branch chief equals della sine T zero
twelve exit so if the value into zero is
equal to twelve then break out of the
while loop because remember we have
three elements and we want to we want to
go through all three and so we need 12
bytes so whenever the index or the off
the index is is equal to 12 we just
break out of the loop and you know that
you have to say jump to while because
this is what makes the well loop work so
it's going to be repeating over and over
again and we need this right whatever
what do we want to do well we want to
load word double sign let's say T six
that's my array and dollar sign T 0 so
load the first element to the register
design t6 the first number and then I
just want to print it out loading media
total times V 0 comma 1 and then I say
add immediate dollar sign is 0 dollar
sign t6 comma 0 so the value in t6 is
going to be moved to a 0 actually you
can help make it easier for you you can
say move the sign is 0.76 using a pseudo
instruction and I missed a comma right
there so you see from t6 it's going to
go to a 0 and finally Cisco so this line
right here this is going to print the
number print current number and then
what I want to do is that I also want to
have like a new line so I'm going to
make a new line ah : dad asked easy and
it's gonna be backslash N
because I want to display a new line
just to make it look better so print a
new line so loading meters on a 17-0
coma for four texts and then I say load
address tell us is 0 comma aa new line
and finally I say Cisco and this is
going to show the number and this is
going to print a new line but we need to
update the offset every iteration every
repetition we need to add 4 to it
because remember that if we don't do
that then this loop is going to be
repeating forever it's because T 0 will
never be 12 so we need to update the
offset we need to modify the value of
the offset so that it actually tells us
the right value for every iteration and
it also is able to to end the loop so we
how do we do that well we're going to
say re add immediate data sine T 0
double sine T 0 comma 4 so what this
line right here is going to do is that
every time every time that we repeat the
while loop a 4 is going to be added to
to the to the index so it's going to be
0 then 4 then 8 and finally 12 and when
it is equal to 12 is going to exit it's
going to go to exit so what do we want
to do in exit in exit we just want to
tell system this is end of program I
mean you don't have to do this but it's
good practice because I don't want to do
anything else so I'm just going to end
the program right here so I'm going to
say load immediate let's have is 0 comma
10 in Sisco and it's also good practice
to have a label for your main function
right here so that's also good practice
right there so
now if we execute the code SAVE wrong
assemble and execute voila we get four
ten and twelve so let me walk you one
more time
this is what I did I declare an array it
had food for three elements for three
integers because because 3 times 4 is 12
bytes I have a newline character so that
my output looks nicer and then in these
three registers
I pulled the values for 10 and 12 then I
needed an index so that I can actually
store the values at the right position
so first we'll first position is index 0
right here
I'd afford to it and so the second
element is our index 4 and added 4 more
so the third element is that index 8
then because I want to display all the
elements I just do the following I clear
t0 because I want to use it as my index
as my index again for the while loop so
I made 2 two labels one cold while and
the other exit and in the wild loop the
exit condition is going to be that the
value in the index is equal to 12 then I
want to break out of the loop I want to
end a loop I load the right value from
the array and then I update the offset
and I print the right value to the
screen and I also print a new line to
make a look nicer and I continue
iterating I go back to while I jump back
to while and I continue going back until
t0 is 12
once it is once it is 12 it's going to
go to exit and here the program is going
to end so thank you for watching this
tutorial I hope you enjoyed this
tutorial and well see you next time with
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