Question

6. Write a program to draw this number triangle 1 1〈--|--〉1 The number of rows is inputted from keyboard.

Write a program to draw this number triangl using MIPS assembly language
The number of rows is inputted from keyboard.

Answer 1

NOTE :- I gave the reference C program which I programmed and took as reference for creating the MIPS program along with the output I generated for 10 rows and MIPS program is in BLOCK mode

C Program for reference :-

#include <stdio.h>
int main()
{
int i, space, rows, k=0;
char ch;
printf("Please enter no. of row for triangle: \n");
scanf("%d",&rows);
for(i=1; i<=rows; ++i, k=0)
{
for(space=1; space<=rows-i; ++space)
{
printf(" ");
}

while(k != 2*i-1)
{
if(k == 0)
printf("1");
else if(k == 2*i-2)
printf(" 1");
else if(i>1 && (k==((2*i)/2)-1))
printf(" |");
else if(i>2 && ((k==1) || (k == 2*i-3))){
ch = (k==1)? '<' : '>';
printf(" %c",ch);
}
else
printf(" -");
++k;
}

printf("\n");
}
  
return 0;
}

Mips Program :-

$LC0:
.ascii "Please enter no. of row for triangle: \000"
$LC1:
.ascii "%d\000"
$LC2:
.ascii " \000"
$LC3:
.ascii " 1\000"
$LC4:
.ascii " |\000"
$LC5:
.ascii " %c\000"
$LC6:
.ascii " -\000"
main:
addiu $sp,$sp,-56
sw $31,52($sp)
sw $fp,48($sp)
move $fp,$sp
sw $0,32($fp)
lui $2,%hi($LC0)
addiu $4,$2,%lo($LC0)
jal puts
nop

addiu $2,$fp,40
move $5,$2
lui $2,%hi($LC1)
addiu $4,$2,%lo($LC1)
jal scanf
nop

li $2,1 # 0x1
sw $2,24($fp)
$L14:
lw $2,40($fp)
lw $3,24($fp)
nop
slt $2,$2,$3
bne $2,$0,$L2
nop

li $2,1 # 0x1
sw $2,28($fp)
$L4:
lw $3,40($fp)
lw $2,24($fp)
nop
subu $3,$3,$2
lw $2,28($fp)
nop
slt $2,$3,$2
bne $2,$0,$L3
nop

lui $2,%hi($LC2)
addiu $4,$2,%lo($LC2)
jal printf
nop

lw $2,28($fp)
nop
addiu $2,$2,1
sw $2,28($fp)
b $L4
nop

$L3:
lw $2,24($fp)
nop
sll $2,$2,1
addiu $3,$2,-1
lw $2,32($fp)
nop
beq $3,$2,$L5
nop

lw $2,32($fp)
nop
bne $2,$0,$L6
nop

li $4,49 # 0x31
jal putchar
nop

b $L7
nop

$L6:
lw $2,24($fp)
nop
addiu $2,$2,-1
sll $3,$2,1
lw $2,32($fp)
nop
bne $3,$2,$L8
nop

lui $2,%hi($LC3)
addiu $4,$2,%lo($LC3)
jal printf
nop

b $L7
nop

$L8:
lw $2,24($fp)
nop
slt $2,$2,2
bne $2,$0,$L9
nop

lw $2,24($fp)
nop
sll $2,$2,1
srl $3,$2,31
addu $2,$3,$2
sra $2,$2,1
addiu $3,$2,-1
lw $2,32($fp)
nop
bne $3,$2,$L9
nop

lui $2,%hi($LC4)
addiu $4,$2,%lo($LC4)
jal printf
nop

b $L7
nop

$L9:
lw $2,24($fp)
nop
slt $2,$2,3
bne $2,$0,$L10
nop

lw $3,32($fp)
li $2,1 # 0x1
beq $3,$2,$L11
nop

lw $2,24($fp)
nop
sll $2,$2,1
addiu $3,$2,-3
lw $2,32($fp)
nop
bne $3,$2,$L10
nop

$L11:
lw $3,32($fp)
li $2,1 # 0x1
bne $3,$2,$L12
nop

li $2,60 # 0x3c
b $L13
nop

$L12:
li $2,62 # 0x3e
$L13:
sb $2,36($fp)
lb $2,36($fp)
nop
move $5,$2
lui $2,%hi($LC5)
addiu $4,$2,%lo($LC5)
jal printf
nop

b $L7
nop

$L10:
lui $2,%hi($LC6)
addiu $4,$2,%lo($LC6)
jal printf
nop

$L7:
lw $2,32($fp)
nop
addiu $2,$2,1
sw $2,32($fp)
b $L3
nop

$L5:
li $4,10 # 0xa
jal putchar
nop

lw $2,24($fp)
nop
addiu $2,$2,1
sw $2,24($fp)
sw $0,32($fp)
b $L14
nop

$L2:
move $2,$0
move $sp,$fp
lw $31,52($sp)
lw $fp,48($sp)
addiu $sp,$sp,56
j $31
nop

Output :-

Stdin Inputs... 10 Result... CPU Time: e.8 sec(S), Memory: 1412 kilobyte(s) Please enter no. of row for triangle: 1〈--|--〉1 |く | 〉1 |く | 〉1 |く | 〉1