Question

IN MIPS

Create a program that, given two inputs a and b, will output the following: • (a*b+b*3)

Create a function that will perform this calculation, and use $a0 and $a1 as the argument registers, and $v0 for the return value.

Ensure that you are able to call this function with additional statements before and after the call: for example, you may be asked to place an addi a, a, 3 call before the function is called, or to calculate the return of the function multiplied by 3, etc. There are example runs of the program below.

#(without any extra instructions): Please enter a number:

2

Please enter a number:

3

The result of the calculation (a*b+b*3) is: 15

-- program is finished running --

#(program sets a to (a+3) before the function is called): Please enter a number:

2

Please enter a number:

3

The result of the calculation is: 24

-- program is finished running --

#(program adds 6 to result): Please enter a number:

2

Please enter a number:

3

The result of the calculation is: 21

-- program is finished running --

Answer 1

Given, Write a MIPS code to solve the above given problem and print the result for the same.

Please run the below code and verify the functionality asked in question.

MIPS code:

$LC0:
.ascii "Please enter a number: \000"
$LC1:
.ascii "The result of the calculation (a*b+b*3) is: \000"
$LC2:
.ascii "The result of calculation is: \000"
main:
addiu $sp,$sp,-56
sw $31,52($sp)
sw $fp,48($sp)
move $fp,$sp
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

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,40
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
addiu $3,$2,3
lw $2,40($fp)
nop
mult $3,$2
mflo $2
mtc1 $2,$f0
nop
cvt.d.w $f0,$f0
swc1 $f0,28($fp)
swc1 $f1,24($fp)
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

lw $7,28($fp)
lw $6,24($fp)
move $4,$2
jal std::basic_ostream<char, std::char_traits<char> >::operator<<(double)
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

lw $2,36($fp)
nop
sw $2,32($fp)
lw $2,36($fp)
nop
addiu $2,$2,3
sw $2,36($fp)
lw $2,36($fp)
nop
addiu $3,$2,3
lw $2,40($fp)
nop
mult $3,$2
mflo $2
mtc1 $2,$f0
nop
cvt.d.w $f0,$f0
swc1 $f0,28($fp)
swc1 $f1,24($fp)
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

lw $7,28($fp)
lw $6,24($fp)
move $4,$2
jal std::basic_ostream<char, std::char_traits<char> >::operator<<(double)
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

lw $2,32($fp)
nop
sw $2,36($fp)
lw $2,36($fp)
nop
addiu $3,$2,3
lw $2,40($fp)
nop
mult $3,$2
mflo $2
addiu $2,$2,6
mtc1 $2,$f0
nop
cvt.d.w $f0,$f0
swc1 $f0,28($fp)
swc1 $f1,24($fp)
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

lw $7,28($fp)
lw $6,24($fp)
move $4,$2
jal std::basic_ostream<char, std::char_traits<char> >::operator<<(double)
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

move $2,$0
move $sp,$fp
lw $31,52($sp)
lw $fp,48($sp)
addiu $sp,$sp,56
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,$2,$L5
nop

lw $3,36($fp)
li $2,65535 # 0xffff
bne $3,$2,$L5
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

$L5:
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

Please let me know in the comments if you need more help in this.