Write simple MIPS assembly code and simulate it using the simulator that was int

Question

Write simple MIPS assembly code and simulate it using the simulator that was introduced in the lab (QtSpim). Write and execute a program that will copy a given 12 elements array into another. Both arrays are in memory. The first array should contain {0, 1, 2, 3, 4,..., 10, 11} and start at 0x10010000. The second array should start at the end of the first array. Write and execute a program that finds the minimum of a given set of elements by looping over the set. The elements are stored in memory starting at 0x10010000 and contain {45, 56, 23, 11, 1, 67, 42, 9, 34, 12, 11, 45}. Write and execute a program to add a and b, leaving the result in a and leaving the b unmodified. Both a and b are 10 elements arrays stored in memory starting at 0x10010000. Provide comments throughout your code. Write a report, which includes: MIPS Code for each program Output Screen shot for registers/console for each program. Conclusion.

Explanation / Answer

coping one array to another:

===================

.LC0:
.ascii "copying...."
.LC1:
.ascii " ...."
.LC2:
.ascii " Finished"
main:
push {r7, lr}
sub sp, sp, #168
add r7, sp, #0
movs r3, #0
str r3, [r7, #4]
movs r3, #0
str r3, [r7, #4]
b .L2
.L3:
ldr r3, [r7, #4]
lsls r3, r3, #2
add r1, r7, #168
add r3, r3, r1
ldr r2, [r7, #4]
str r2, [r3, #-80]
ldr r3, [r7, #4]
adds r3, r3, #1
str r3, [r7, #4]
.L2:
ldr r3, [r7, #4]
cmp r3, #11
ble .L3
movw r0, #:lower16:.LC0
movt r0, #:upper16:.LC0
bl printf
movs r3, #0
str r3, [r7, #4]
b .L4
.L5:
ldr r3, [r7, #4]
lsls r3, r3, #2
add r2, r7, #168
add r3, r3, r2
ldr r2, [r3, #-80]
ldr r3, [r7, #4]
lsls r3, r3, #2
add r1, r7, #168
add r3, r3, r1
str r2, [r3, #-160]
movw r0, #:lower16:.LC1
movt r0, #:upper16:.LC1
bl puts
ldr r3, [r7, #4]
adds r3, r3, #1
str r3, [r7, #4]
.L4:
ldr r3, [r7, #4]
cmp r3, #11
ble .L5
movw r0, #:lower16:.LC2
movt r0, #:upper16:.LC2
bl printf
movs r3, #0
mov r0, r3
adds r7, r7, #168
mov sp, r7
pop {r7, pc}

=====================

Finding th minimum element:

====================

.LC0:
.ascii "searching...."
.LC1:
.ascii " Minimum element is %d "
main:
push {r7, lr}
sub sp, sp, #88
add r7, sp, #0
movs r3, #0
str r3, [r7]
add r2, r7, #8
movs r3, #80
mov r0, r2
movs r1, #0
mov r2, r3
bl memset
movs r3, #45
str r3, [r7, #8]
movs r3, #56
str r3, [r7, #12]
movs r3, #23
str r3, [r7, #16]
movs r3, #11
str r3, [r7, #20]
movs r3, #1
str r3, [r7, #24]
movs r3, #67
str r3, [r7, #28]
movs r3, #42
str r3, [r7, #32]
movs r3, #9
str r3, [r7, #36]
movs r3, #34
str r3, [r7, #40]
movs r3, #12
str r3, [r7, #44]
movs r3, #11
str r3, [r7, #48]
movs r3, #45
str r3, [r7, #52]
movs r3, #99
str r3, [r7, #4]
movw r0, #:lower16:.LC0
movt r0, #:upper16:.LC0
bl printf
movs r3, #0
str r3, [r7]
b .L2
.L4:
ldr r3, [r7]
lsls r3, r3, #2
add r2, r7, #88
add r3, r3, r2
ldr r2, [r3, #-80]
ldr r3, [r7, #4]
cmp r2, r3
bge .L3
ldr r3, [r7]
lsls r3, r3, #2
add r2, r7, #88
add r3, r3, r2
ldr r3, [r3, #-80]
str r3, [r7, #4]
.L3:
ldr r3, [r7]
adds r3, r3, #1
str r3, [r7]
.L2:
ldr r3, [r7]
cmp r3, #11
ble .L4
movw r0, #:lower16:.LC1
movt r0, #:upper16:.LC1
ldr r1, [r7, #4]
bl printf
movs r3, #0
mov r0, r3
adds r7, r7, #88
mov sp, r7
pop {r7, pc}

Adding element :

===========printf@plt-0x10:
pushq 0x20063a(%rip) # 600ae0 <_GLOBAL_OFFSET_TABLE_+0x8>
jmpq *0x20063c(%rip) # 600ae8 <_GLOBAL_OFFSET_TABLE_+0x10>
nopl 0x0(%rax)
printf@plt:
jmpq *0x20063a(%rip) # 600af0 <_GLOBAL_OFFSET_TABLE_+0x18>
pushq $0x0
jmpq 4004a0 <_init+0x28>
main:
push %rbp
mov %rsp,%rbp
sub $0x60,%rsp
movl $0x0,-0x4(%rbp)
movl $0x2d,-0x30(%rbp)
movl $0x38,-0x2c(%rbp)
movl $0x17,-0x28(%rbp)
movl $0xb,-0x24(%rbp)
movl $0x1,-0x20(%rbp)
movl $0x43,-0x1c(%rbp)
movl $0x2a,-0x18(%rbp)
movl $0x9,-0x14(%rbp)
movl $0x22,-0x10(%rbp)
movl $0xc,-0xc(%rbp)
movl $0x0,-0x60(%rbp)
movl $0x1,-0x5c(%rbp)
movl $0x2,-0x58(%rbp)
movl $0x3,-0x54(%rbp)
movl $0x4,-0x50(%rbp)
movl $0x5,-0x4c(%rbp)
movl $0x6,-0x48(%rbp)
movl $0x7,-0x44(%rbp)
movl $0x8,-0x40(%rbp)
movl $0x9,-0x3c(%rbp)
mov $0x400758,%edi
mov $0x0,%eax
callq 4004b0 <printf@plt>
movl $0x0,-0x4(%rbp)
cmpl $0x9,-0x4(%rbp)
jg 4006b0 <main+0xda>
mov -0x4(%rbp),%eax
cltq   
mov -0x30(%rbp,%rax,4),%edx
mov -0x4(%rbp),%eax
cltq   
mov -0x60(%rbp,%rax,4),%eax
add %eax,%edx
mov -0x4(%rbp),%eax
cltq   
mov %edx,-0x30(%rbp,%rax,4)
addl $0x1,-0x4(%rbp)
jmp 400687 <main+0xb1>
mov $0x400781,%edi
mov $0x0,%eax
callq 4004b0 <printf@plt>
mov $0x0,%eax
leaveq
retq   
nopw %cs:0x0(%rax,%rax,1)

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