Question

Translate the following pseudocode to MIPS assembly programming language

cout << “\n Please input a number for $s0”;

cin >> $s0;

cout << “\n Please input a number for $s1”;

cin >> $s1;

cout << “\n Please input a number for $s2”;

cin >> $s2;

$t0 = $s0 / 8 - 2 * $s1 + $s2;

cout << “\n the Value of the expression “$s0 / 8 - 2 * $s1 + $s2” is ”;

cout >> $t0;

return;

Answer 1

For the following program:

#include <iostream>

using namespace std;

int $s0, $s1, $s2;

int $t0;

int main() {

    cout << "\n Please input a number for $s0";

    cin >> $s0;

    cout << "\n Please input a number for $s1";

    cin >> $s1;

    cout << "\n Please input a number for $s2";

    cin >> $s2;

    $t0 = $s0 / 8 - 2 * $s1 + $s2;

    cout << "\n the Value of the expression “$s0 / 8 - 2 * $s1 + $s2” is ";

    cout << $t0;

return 0;

}

// Corresponding MIPS Assembly language program is as follows

$s0:

$s1:

$s2:

$t0:

$LC0:

        .ascii  "\012 Please input a number for $s0\000"

$LC1:

        .ascii  "\012 Please input a number for $s1\000"

$LC2:

        .ascii  "\012 Please input a number for $s2\000"

$LC3:

        .ascii  "\012 the Value of the expression \342\200\234$s0 / 8 - 2"

        .ascii  " * $s1 + $s2\342\200\235 is \000"

main:

        addiu   $sp,$sp,-32

        sw      $31,28($sp)

        sw      $fp,24($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

        lui     $2,%hi($s0)

        addiu   $5,$2,%lo($s0)

        lui     $2,%hi(_ZSt3cin)

        addiu   $4,$2,%lo(_ZSt3cin)

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

        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

        lui     $2,%hi($s1)

        addiu   $5,$2,%lo($s1)

        lui     $2,%hi(_ZSt3cin)

        addiu   $4,$2,%lo(_ZSt3cin)

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

        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

        lui     $2,%hi($s2)

        addiu   $5,$2,%lo($s2)

        lui     $2,%hi(_ZSt3cin)

        addiu   $4,$2,%lo(_ZSt3cin)

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

        nop

        lui     $2,%hi($s0)

        lw      $2,%lo($s0)($2)

        nop

        bgez    $2,$L2

        nop

        addiu   $2,$2,7

$L2:

        sra     $2,$2,3

        move    $3,$2

        lui     $2,%hi($s1)

        lw      $2,%lo($s1)($2)

        nop

        sll     $2,$2,1

        subu    $3,$3,$2

        lui     $2,%hi($s2)

        lw      $2,%lo($s2)($2)

        nop

        addu    $3,$3,$2

        lui     $2,%hi($t0)

        sw      $3,%lo($t0)($2)

        lui     $2,%hi($LC3)

        addiu   $5,$2,%lo($LC3)

        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

        lui     $2,%hi($t0)

        lw      $2,%lo($t0)($2)

        nop

        move    $5,$2

        lui     $2,%hi(_ZSt4cout)

        addiu   $4,$2,%lo(_ZSt4cout)

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

        nop

        move    $2,$0

        move    $sp,$fp

        lw      $31,28($sp)

        lw      $fp,24($sp)

        addiu   $sp,$sp,32

        j       $31

        nop