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.data
empty_LS:
.text
jal Main
li $v0 10
syscall
Main:
sw $fp -8($sp)
move $fp $sp
subu $sp $sp 8
sw $ra -4($fp)
li $a0 8
jal _heapAlloc
move $t0 $v0
bnez $t0 null1
la $a0 _str0
j _error
null1:
move $a0 $t0
li $a1 10
jal LS.Start
move $t0 $v0
move $a0 $t0
jal _print
lw $ra -4($fp)
lw $fp -8($fp)
addu $sp $sp 8
jr $ra
LS.Start:
sw $fp -8($sp)
move $fp $sp
subu $sp $sp 12
sw $ra -4($fp)
sw $s0 0($sp)
move $s0 $a0
move $t0 $a1
move $a0 $s0
move $a1 $t0
jal LS.Init
move $a0 $s0
jal LS.Print
li $a0 9999
jal _print
move $a0 $s0
li $a1 8
jal LS.Search
move $t0 $v0
move $a0 $t0
jal _print
move $a0 $s0
li $a1 12
jal LS.Search
move $t0 $v0
move $a0 $t0
jal _print
move $a0 $s0
li $a1 17
jal LS.Search
move $t0 $v0
move $a0 $t0
jal _print
move $a0 $s0
li $a1 50
jal LS.Search
move $t0 $v0
move $a0 $t0
jal _print
li $v0 55
lw $s0 0($sp)
lw $ra -4($fp)
lw $fp -8($fp)
addu $sp $sp 12
jr $ra
LS.Print:
sw $fp -8($sp)
move $fp $sp
subu $sp $sp 8
sw $ra -4($fp)
move $t0 $a0
li $t1 1
while1_top:
lw $t2 4($t0)
slt $t2 $t1 $t2
beqz $t2 while1_end
lw $t2 0($t0)
bnez $t2 null2
la $a0 _str0
j _error
null2:
lw $t3 0($t2)
sltu $t3 $t1 $t3
bnez $t3 bounds1
la $a0 _str1
j _error
bounds1:
mul $t3 $t1 4
addu $t3 $t3 $t2
lw $t3 4($t3)
move $a0 $t3
jal _print
addu $t1 $t1 1
j while1_top
while1_end:
li $v0 0
lw $ra -4($fp)
lw $fp -8($fp)
addu $sp $sp 8
jr $ra
LS.Search:
sw $fp -8($sp)
move $fp $sp
subu $sp $sp 8
sw $ra -4($fp)
move $t0 $a0
move $t1 $a1
li $t2 1
li $t3 0
while2_top:
lw $t4 4($t0)
slt $t4 $t2 $t4
beqz $t4 while2_end
lw $t4 0($t0)
bnez $t4 null3
la $a0 _str0
j _error
null3:
lw $t5 0($t4)
sltu $t5 $t2 $t5
bnez $t5 bounds2
la $a0 _str1
j _error
bounds2:
mul $t5 $t2 4
addu $t5 $t5 $t4
lw $t5 4($t5)
addu $t4 $t1 1
slt $t6 $t5 $t1
beqz $t6 if1_else
j if1_end
if1_else:
slt $t4 $t5 $t4
bnez $t4 if2_else
j if2_end
if2_else:
li $t3 1
lw $t2 4($t0)
if2_end:
if1_end:
addu $t2 $t2 1
j while2_top
while2_end:
move $v0 $t3
lw $ra -4($fp)
lw $fp -8($fp)
addu $sp $sp 8
jr $ra
LS.Init:
sw $fp -8($sp)
move $fp $sp
subu $sp $sp 12
sw $ra -4($fp)
sw $s0 0($sp)
move $s0 $a0
move $t0 $a1
sw $t0 4($s0)
move $a0 $t0
jal AllocArray
move $t0 $v0
sw $t0 0($s0)
li $t0 1
lw $t1 4($s0)
addu $t1 $t1 1
while3_top:
lw $t2 4($s0)
slt $t2 $t0 $t2
beqz $t2 while3_end
mul $t2 $t0 2
subu $t3 $t1 3
lw $t4 0($s0)
bnez $t4 null4
la $a0 _str0
j _error
null4:
lw $t5 0($t4)
sltu $t5 $t0 $t5
bnez $t5 bounds3
la $a0 _str1
j _error
bounds3:
mul $t5 $t0 4
addu $t5 $t5 $t4
addu $t3 $t2 $t3
sw $t3 4($t5)
addu $t0 $t0 1
subu $t1 $t1 1
j while3_top
while3_end:
li $v0 0
lw $s0 0($sp)
lw $ra -4($fp)
lw $fp -8($fp)
addu $sp $sp 12
jr $ra
AllocArray:
sw $fp -8($sp)
move $fp $sp
subu $sp $sp 8
sw $ra -4($fp)
move $t0 $a0
mul $t1 $t0 4
addu $t1 $t1 4
move $a0 $t1
jal _heapAlloc
move $t1 $v0
sw $t0 0($t1)
move $v0 $t1
lw $ra -4($fp)
lw $fp -8($fp)
addu $sp $sp 8
jr $ra
_print:
li $v0 1 # syscall: print integer
syscall
la $a0 _newline
li $v0 4 # syscall: print string
syscall
jr $ra
_error:
li $v0 4 # syscall: print string
syscall
li $v0 10 # syscall: exit
syscall
_heapAlloc:
li $v0 9 # syscall: sbrk
syscall
jr $ra
.data
.align 0
_newline: .asciiz "\n"
_str0: .asciiz "null pointer\n"
_str1: .asciiz "array index out of bounds\n"
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