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listmain.asm
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.text
.globl main
main:
addi sp,sp,-16
# studentlist = createList(studentArr, SIZE);
li a1,10
la a0, studentArr
jal createList
sw a0,12(sp)
# sort(&studentlist);
addi a0,sp,12
jal sort
# printList(studentlist);
lw a0,12(sp)
jal printList
# return
li a7, 10
ecall
.globl addStudent
# asm is nutty as the struct was passed in the registers.
addStudent:
addi sp,sp,-16
sw ra,12(sp)
sw s0,8(sp)
sw s1,4(sp)
mv s1,a0
mv s0,a1
li a0,20
jal malloc
lw a2,0(s0)
lw a3,4(s0)
lw a4,8(s0)
lw a5,12(s0)
sw a2,0(a0)
sw a3,4(a0)
sw a4,8(a0)
sw a5,12(a0)
sw s1,16(a0)
lw ra,12(sp)
lw s0,8(sp)
lw s1,4(sp)
addi sp,sp,16
jr ra
.globl createList
createList:
blez a1,endcreateList
addi sp,sp,-48
sw ra,44(sp)
sw s0,40(sp)
sw s1,36(sp)
mv s0,a0
slli s1,a1,2
add s1,s1,a1
slli s1,s1,2
add s1,a0,s1
li a0,0
cloop:
lw a1,0(s0)
lw a2,4(s0)
lw a3,8(s0)
lw a4,12(s0)
lw a5,16(s0)
sw a1,0(sp)
sw a2,4(sp)
sw a3,8(sp)
sw a4,12(sp)
sw a5,16(sp)
mv a1,sp
jal addStudent
addi s0,s0,20
bne s0,s1,cloop
lw ra,44(sp)
lw s0,40(sp)
lw s1,36(sp)
addi sp,sp,48
jr ra
endcreateList:
li a0,0
ret
.globl printList
printList:
beqz a0,endprintList
addi sp,sp,-16
sw ra,12(sp)
sw s0,8(sp)
mv s0,a0
lw a0,8(s0)
jal printint
li a0, 0x20
jal printchar
mv a0,s0
jal printstring
li a0, 0x20
jal printchar
lw a0,12(s0)
jal printint
li a0, '\n'
jal printchar
lw a0,16(s0)
jal printList
lw ra,12(sp)
lw s0,8(sp)
addi sp,sp,16
jr ra
endprintList:
ret
#essentially swizzles the next pointers of the args.
.globl swapNodes
swapNodes:
sw a2,0(a0)
sw a1,16(a3)
lw a5,16(a2)
lw a4,16(a1)
sw a4,16(a2)
sw a5,16(a1)
ret
.globl sort
sort:
addi sp,sp,-16
sw ra,12(sp)
sw s0,8(sp)
mv s0,a0
lw a0,0(a0)
beqz a0,sortbasecase
jal recurSelectionSort
sw a0,0(s0)
sortbasecase:
lw ra,12(sp)
lw s0,8(sp)
addi sp,sp,16
jr ra
.globl malloc
malloc:
# loosely simulates sbrk system call
# a0 = amount of memory in bytes
# a0 = address to the allocated block
li a7, 9
ecall
ret
.globl printchar
printchar:
li a7, 11
ecall
ret
.globl printint
printint:
li a7, 1
ecall
ret
.globl printstring
printstring:
li a7, 4
ecall
ret
.globl studentArr
.data
studentArr:
.string "Dougy"
.word 13
.word 2122
.word 0
.string "Timmy"
.word 15
.word 2122
.word 0
.string "Emily"
.word 18
.word 2123
.word 0
.string "Jimmy"
.word 14
.word 2120
.word 0
.string "Kimmy"
.word 11
.word 2123
.word 0
.string "Carlo"
.word 19
.word 2123
.word 0
.string "Vicky"
.word 22
.word 2120
.word 0
.string "Anton"
.word 12
.word 2322
.word 0
.string "Brady"
.word 10
.word 2120
.word 0
.string "Sonya"
.word 16
.word 2123
.word 0