In the SPIM simulator in MIPS assembly, write the itri routine in the itri.s skeleton to make it print an inverted triangle. The height of the triangle will be given in $a0, and will be between 1 and 40 inclusive. For the first three tests, the included test harness should print (spimsimulator(dot)sourceforge(dot)net)
![### Start your solution here .text # $a = height of triangle [1..40] .globl itri itri: jr $ra ### End your solution here ###](http://img.homeworklib.com/questions/eaf77060-51f3-11eb-937f-b747ec63d1fa.png?x-oss-process=image/resize,w_560)
Homework Answers
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PROGRAM
.LC0:
.ascii "Enter number of rows : \000"
.LC1:
.ascii " \000"
.LC2:
.ascii "* \000"
main:
daddiu $sp,$sp,-64
sd $31,56($sp)
sd $fp,48($sp)
sd $28,40($sp)
move $fp,$sp
lui $28,%hi(%neg(%gp_rel(main)))
daddu $28,$28,$25
daddiu $28,$28,%lo(%neg(%gp_rel(main)))
ld $2,%got_page(.LC0)($28)
daddiu $5,$2,%got_ofst(.LC0)
ld $4,%got_disp(_ZSt4cout)($28)
ld $2,%call16(_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc)($28)
move $25,$2
1: jalr $25
nop
daddiu $2,$fp,16
move $5,$2
ld $4,%got_disp(_ZSt3cin)($28)
ld $2,%call16(_ZNSirsERi)($28)
move $25,$2
1: jalr $25
nop
ld $5,%got_disp(_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)($28)
ld $4,%got_disp(_ZSt4cout)($28)
ld $2,%call16(_ZNSolsEPFRSoS_E)($28)
move $25,$2
1: jalr $25
nop
lw $2,16($fp)
sw $2,0($fp)
.L9:
lw $2,0($fp)
blez $2,.L2
nop
sw $0,4($fp)
.L4:
lw $3,16($fp)
lw $2,0($fp)
subu $2,$3,$2
lw $3,4($fp)
slt $2,$3,$2
beq $2,$0,.L3
nop
ld $2,%got_page(.LC1)($28)
daddiu $5,$2,%got_ofst(.LC1)
ld $4,%got_disp(_ZSt4cout)($28)
ld $2,%call16(_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc)($28)
move $25,$2
1: jalr $25
nop
lw $2,4($fp)
addiu $2,$2,1
sw $2,4($fp)
b .L4
nop
.L3:
lw $2,0($fp)
sw $2,8($fp)
.L6:
lw $2,0($fp)
sll $2,$2,1
addiu $2,$2,-1
lw $3,8($fp)
slt $2,$2,$3
bne $2,$0,.L5
nop
ld $2,%got_page(.LC2)($28)
daddiu $5,$2,%got_ofst(.LC2)
ld $4,%got_disp(_ZSt4cout)($28)
ld $2,%call16(_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc)($28)
move $25,$2
1: jalr $25
nop
lw $2,8($fp)
addiu $2,$2,1
sw $2,8($fp)
b .L6
nop
.L5:
sw $0,12($fp)
.L8:
lw $2,0($fp)
addiu $2,$2,-1
lw $3,12($fp)
slt $2,$3,$2
beq $2,$0,.L7
nop
ld $2,%got_page(.LC2)($28)
daddiu $5,$2,%got_ofst(.LC2)
ld $4,%got_disp(_ZSt4cout)($28)
ld $2,%call16(_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc)($28)
move $25,$2
1: jalr $25
nop
lw $2,12($fp)
addiu $2,$2,1
sw $2,12($fp)
b .L8
nop
.L7:
ld $5,%got_disp(_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)($28)
ld $4,%got_disp(_ZSt4cout)($28)
ld $2,%call16(_ZNSolsEPFRSoS_E)($28)
move $25,$2
1: jalr $25
nop
lw $2,0($fp)
addiu $2,$2,-1
sw $2,0($fp)
b .L9
nop
.L2:
move $2,$0
move $sp,$fp
ld $31,56($sp)
ld $fp,48($sp)
ld $28,40($sp)
daddiu $sp,$sp,64
j $31
nop
__static_initialization_and_destruction_0(int, int):
daddiu $sp,$sp,-48
sd $31,40($sp)
sd $fp,32($sp)
sd $28,24($sp)
move $fp,$sp
lui $28,%hi(%neg(%gp_rel(__static_initialization_and_destruction_0(int, int))))
daddu $28,$28,$25
daddiu $28,$28,%lo(%neg(%gp_rel(__static_initialization_and_destruction_0(int, int))))
move $3,$4
move $2,$5
sll $3,$3,0
sw $3,0($fp)
sll $2,$2,0
sw $2,4($fp)
lw $3,0($fp)
li $2,1 # 0x1
bne $3,$2,.L13
nop
lw $3,4($fp)
li $2,65535 # 0xffff
bne $3,$2,.L13
nop
ld $2,%got_page(_ZStL8__ioinit)($28)
daddiu $4,$2,%got_ofst(_ZStL8__ioinit)
ld $2,%call16(_ZNSt8ios_base4InitC1Ev)($28)
move $25,$2
1: jalr $25
nop
ld $6,%got_disp(__dso_handle)($28)
ld $2,%got_page(_ZStL8__ioinit)($28)
daddiu $5,$2,%got_ofst(_ZStL8__ioinit)
ld $4,%got_disp(_ZNSt8ios_base4InitD1Ev)($28)
ld $2,%call16(__cxa_atexit)($28)
move $25,$2
1: jalr $25
nop
.L13:
nop
move $sp,$fp
ld $31,40($sp)
ld $fp,32($sp)
ld $28,24($sp)
daddiu $sp,$sp,48
j $31
nop
_GLOBAL__sub_I_main:
daddiu $sp,$sp,-32
sd $31,24($sp)
sd $fp,16($sp)
sd $28,8($sp)
move $fp,$sp
lui $28,%hi(%neg(%gp_rel(_GLOBAL__sub_I_main)))
daddu $28,$28,$25
daddiu $28,$28,%lo(%neg(%gp_rel(_GLOBAL__sub_I_main)))
li $5,65535 # 0xffff
li $4,1 # 0x1
ld $2,%got_page(__static_initialization_and_destruction_0(int, int))($28)
daddiu $2,$2,%got_ofst(__static_initialization_and_destruction_0(int, int))
move $25,$2
1: jalr $25
nop
move $sp,$fp
ld $31,24($sp)
ld $fp,16($sp)
ld $28,8($sp)
daddiu $sp,$sp,32
j $31
nop
IMAGE OF PROGRAM
IMAGE OF OUTPUT
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