Question

Using MARS simulator, write MIPS programs according to the following scenarios:
Receive an integer from the user and print out the individual bit of that number in binary format

Answer 1

The MIPS program is:

$LC0:

.ascii "Enter the Number to check Prime: \000"

$LC1:

.ascii "not prime.\000"

$LC2:

.ascii "prime.\000"

main:

addiu $sp,$sp,-48

sw $31,44($sp)

sw $fp,40($sp)

move $fp,$sp

sw $0,32($fp)

sw $0,28($fp)

lui $2,%hi($LC0)

addiu $5,$2,%lo($LC0)

lui $2,%hi(_ZSt4cout)

addiu $4,$2,%lo(_ZSt4cout)

jal std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> > (std::basic_ostream<char, std::char_traits<char> >&, char const*)

nop

addiu $2,$fp,36

move $5,$2

lui $2,%hi(_ZSt3cin)

addiu $4,$2,%lo(_ZSt3cin)

jal std::basic_istream<char, std::char_traits<char> >::operator>>(int&)

nop

lw $2,36($fp)

nop

srl $3,$2,31

addu $2,$3,$2

sra $2,$2,1

sw $2,32($fp)

li $2,2 # 0x2

sw $2,24($fp)

$L4:

lw $3,24($fp)

lw $2,32($fp)

nop

slt $2,$2,$3

bne $2,$0,$L2

nop

lw $3,36($fp)

lw $2,24($fp)

nop

bne $2,$0,1f

div $0,$3,$2

break 7

1:

mfhi $2

bne $2,$0,$L3

nop

lui $2,%hi($LC1)

addiu $5,$2,%lo($LC1)

lui $2,%hi(_ZSt4cout)

addiu $4,$2,%lo(_ZSt4cout)

jal std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> > (std::basic_ostream<char, std::char_traits<char> >&, char const*)

nop

move $3,$2

lui $2,%hi(_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)

addiu $5,$2,%lo(_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)

move $4,$3

jal std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&))

nop

li $2,1 # 0x1

sw $2,28($fp)

b $L2

nop

$L3:

lw $2,24($fp)

nop

addiu $2,$2,1

sw $2,24($fp)

b $L4

nop

$L2:

lw $2,28($fp)

nop

bne $2,$0,$L5

nop

lui $2,%hi($LC2)

addiu $5,$2,%lo($LC2)

lui $2,%hi(_ZSt4cout)

addiu $4,$2,%lo(_ZSt4cout)

jal std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)

nop

move $3,$2

lui $2,%hi(_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)

addiu $5,$2,%lo(_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)

move $4,$3

jal std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&))

nop

$L5:

move $2,$0

move $sp,$fp

lw $31,44($sp)

lw $fp,40($sp)

addiu $sp,$sp,48

j $31

nop

__static_initialization_and_destruction_0(int, int):

addiu $sp,$sp,-32

sw $31,28($sp)

sw $fp,24($sp)

move $fp,$sp

sw $4,32($fp)

sw $5,36($fp)

lw $3,32($fp)

li $2,1 # 0x1

bne $3,$2,$L9

nop

lw $3,36($fp)

li $2,65535 # 0xffff

bne $3,$2,$L9

nop

lui $2,%hi(_ZStL8__ioinit)

addiu $4,$2,%lo(_ZStL8__ioinit)

jal std::ios_base::Init::Init() [complete object constructor]

nop

lui $2,%hi(__dso_handle)

addiu $6,$2,%lo(__dso_handle)

lui $2,%hi(_ZStL8__ioinit)

addiu $5,$2,%lo(_ZStL8__ioinit)

lui $2,%hi(_ZNSt8ios_base4InitD1Ev)

addiu $4,$2,%lo(_ZNSt8ios_base4InitD1Ev)

jal __cxa_atexit

nop

$L9:

nop

move $sp,$fp

lw $31,28($sp)

lw $fp,24($sp)

addiu $sp,$sp,32

j $31

nop

_GLOBAL__sub_I_main:

addiu $sp,$sp,-32

sw $31,28($sp)

sw $fp,24($sp)

move $fp,$sp

li $5,65535 # 0xffff

li $4,1 # 0x1

jal __static_initialization_and_destruction_0(int, int)

nop

move $sp,$fp

lw $31,28($sp)

lw $fp,24($sp)

addiu $sp,$sp,32

j $31

nop