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Copy pathruntime.s
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runtime.s
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.text
initArray:
li $a2, 4
mul $a0, $a0, $a2
li $v0, 9
syscall
move $v1, $v0
add $a0, $a0, $v0
_initArray_0:
sw $a1, ($v1)
add $v1, $v1, 4
bne $v1, $a0, _initArray_0
jr $ra
allocRecord:
li $a2, 4
mul $a0, $a0, $a2
li $v0, 9
syscall
jr $ra
printi:
li $v0, 1
syscall
jr $ra
print:
li $v0, 4
syscall
jr $ra
flush:
jr $ra
strcmp:
strcmptest:
lb $a2 ($a0)
lb $a3 ($a1)
beq $a2, $zero, strcmpend
beq $a3, $zero, strcmpend
bgt $a2, $a3 strcmpgreat
blt $a2, $a3 strcmpless
add $a0, $a0, 1
add $a1, $a1, 1
j strcmptest
strcmpgreat:
li $v0, 1
jr $ra
strcmpless:
li $v0, -1
jr $ra
strcmpend:
bne $a2 $zero strcmpgreat
bne $a3 $zero strcmpless
li $v0, 0
jr $ra
size:
move $v0, $zero
sizeloop:
lb $a1 ($a0)
beq $a1, $zero sizeexit
add $v0, $v0, 1
add $a0, $a0, 1
j sizeloop
sizeexit:
jr $ra
ord:
lb $a1,($a0)
li $v0,-1
beqz $a1,Lrunt5
lb $v0,($a0)
Lrunt5:
jr $ra
getchar:
li $v0, 9
li $a0, 2
syscall
move $a0, $v0
li $a1, 2
li $v0, 8
syscall
move $v0, $a0
jr $ra
chr:
move $a1, $a0
li $v0, 9
li $a0, 2
syscall
sb $a1 ($v0)
sb $zero 1($v0)
jr $ra
exit:
li $v0, 10
syscall
substring:
add $a1, $a0, $a1
move $a3, $a1
li $v0, 9
add $a2, $a2, 1
move $a0, $a2
add $a0, $a0, 1
syscall
# got a new string in $v0
add $a2,$a2,$a3
add $a2,$a2,-1
move $a0, $v0
substringcopy:
beq $a1 $a2 substringexit
lb $a3 ($a1)
sb $a3 ($a0)
add $a1, $a1, 1
add $a0, $a0, 1
j substringcopy
substringexit:
sb $zero, ($a0)
jr $ra
copy:
copyloop:
lb $a2, ($a1)
beq $zero, $a2 copyexit
sb $a2, ($a0)
add $a0,$a0,1
add $a1,$a1,1
j copyloop
copyexit:
sb $zero, ($a0)
move $v0, $a0
jr $ra
concat:
sw $a0, -4($sp)
sw $a1, -8($sp)
sw $ra, -12($sp)
jal size
li $a3, 1
add $a3,$a3,$v0
lw $a0, -8($sp)
jal size
add $a3, $a3, $v0
move $a0, $a3
li $v0, 9
syscall
move $a3, $v0
move $a0, $v0
lw $a1, -4($sp)
jal copy
move $a0, $v0
lw $a1, -8($sp)
jal copy
move $v0, $a3
lw $ra, -12($sp)
jr $ra