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Covert C++ code into MIPS. -If x has a value if 2, print "bbb" if x...

Covert C++ code into MIPS.

-If x has a value if 2, print "bbb" if x has a value of 3, print "ccc" if x has a value of 4, print "ddd" if x has a value other than 2, 3, or 4 print "eee".

result = "";
switch (x)
{
case 2: result = result + "bbb"; break;
case 3: result = result + "ccc"; break;
case 4: result = result + "ddd"; break;
default: result = result + "eee";
}
cout << "3.\t" << result << endl;

This C++ code in MIPS? Need help.

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Answer #1

please find the required C++ program:

//==========================================

#include <iostream>

#include<string.h>

using namespace std;

int main() {

string result = "";

int x;

switch (x)

{

case 2: result = result + "bbb"; break;

case 3: result = result + "ccc"; break;

case 4: result = result + "ddd"; break;

default: result = result + "eee";

}

cout << "3.\t" << result << endl;

return 1;

}

//==========================================

corresponding MIPS program:

//===========================================

.LC0:

.ascii "\000"

.LC1:

.ascii "bbb\000"

.LC2:

.ascii "ccc\000"

.LC3:

.ascii "ddd\000"

.LC4:

.ascii "eee\000"

.LC5:

.ascii "3.\011\000"

main:

daddiu $sp,$sp,-208

sd $31,200($sp)

sd $fp,192($sp)

sd $28,184($sp)

sd $16,176($sp)

move $fp,$sp

lui $28,%hi(%neg(%gp_rel(main)))

daddu $28,$28,$25

daddiu $28,$28,%lo(%neg(%gp_rel(main)))

daddiu $2,$fp,136

move $4,$2

ld $2,%call16(_ZNSaIcEC1Ev)($28)

move $25,$2

1: jalr $25

nop

daddiu $2,$fp,136

daddiu $3,$fp,144

move $6,$2

ld $2,%got_page(.LC0)($28)

daddiu $5,$2,%got_ofst(.LC0)

move $4,$3

ld $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC1EPKcRKS3_)($28)

move $25,$2

1: jalr $25

nop

daddiu $2,$fp,136

move $4,$2

ld $2,%call16(_ZNSaIcED1Ev)($28)

move $25,$2

1: jalr $25

nop

lw $2,0($fp)

li $3,3 # 0x3

beq $2,$3,.L3

nop

li $3,4 # 0x4

beq $2,$3,.L4

nop

li $3,2 # 0x2

bne $2,$3,.L20

nop

daddiu $3,$fp,104

daddiu $4,$fp,144

ld $2,%got_page(.LC1)($28)

daddiu $6,$2,%got_ofst(.LC1)

move $5,$4

move $4,$3

ld $2,%got_disp(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > std::operator+<char, std::char_traits<char>, std::allocator<char> >(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, char const*))($28)

move $25,$2

1: jalr $25

nop

daddiu $3,$fp,104

daddiu $2,$fp,144

move $5,$3

move $4,$2

ld $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSERKS4_)($28)

move $25,$2

1: jalr $25

nop

daddiu $2,$fp,104

move $4,$2

ld $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED1Ev)($28)

move $25,$2

1: jalr $25

nop

b .L6

nop

.L3:

daddiu $3,$fp,72

daddiu $4,$fp,144

ld $2,%got_page(.LC2)($28)

daddiu $6,$2,%got_ofst(.LC2)

move $5,$4

move $4,$3

ld $2,%got_disp(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > std::operator+<char, std::char_traits<char>, std::allocator<char> >(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, char const*))($28)

move $25,$2

1: jalr $25

nop

daddiu $3,$fp,72

daddiu $2,$fp,144

move $5,$3

move $4,$2

ld $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSERKS4_)($28)

move $25,$2

1: jalr $25

nop

daddiu $2,$fp,72

move $4,$2

ld $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED1Ev)($28)

move $25,$2

1: jalr $25

nop

b .L6

nop

.L4:

daddiu $3,$fp,40

daddiu $4,$fp,144

ld $2,%got_page(.LC3)($28)

daddiu $6,$2,%got_ofst(.LC3)

move $5,$4

move $4,$3

ld $2,%got_disp(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > std::operator+<char, std::char_traits<char>, std::allocator<char> >(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, char const*))($28)

move $25,$2

1: jalr $25

nop

daddiu $3,$fp,40

daddiu $2,$fp,144

move $5,$3

move $4,$2

ld $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSERKS4_)($28)

move $25,$2

1: jalr $25

nop

daddiu $2,$fp,40

move $4,$2

ld $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED1Ev)($28)

move $25,$2

1: jalr $25

nop

b .L6

nop

.L20:

daddiu $3,$fp,8

daddiu $4,$fp,144

ld $2,%got_page(.LC4)($28)

daddiu $6,$2,%got_ofst(.LC4)

move $5,$4

move $4,$3

ld $2,%got_disp(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > std::operator+<char, std::char_traits<char>, std::allocator<char> >(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, char const*))($28)

move $25,$2

1: jalr $25

nop

daddiu $3,$fp,8

daddiu $2,$fp,144

move $5,$3

move $4,$2

ld $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSERKS4_)($28)

move $25,$2

1: jalr $25

nop

daddiu $2,$fp,8

move $4,$2

ld $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED1Ev)($28)

move $25,$2

1: jalr $25

nop

.L6:

ld $2,%got_page(.LC5)($28)

daddiu $5,$2,%got_ofst(.LC5)

ld $4,%got_disp(_ZSt4cout)($28)

ld $2,%call16(_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc)($28)

move $25,$2

1: jalr $25

nop

move $3,$2

daddiu $2,$fp,144

move $5,$2

move $4,$3

ld $2,%call16(_ZStlsIcSt11char_traitsIcESaIcEERSt13basic_ostreamIT_T0_ES7_RKNSt7__cxx1112basic_stringIS4_S5_T1_EE)($28)

move $25,$2

1: jalr $25

nop

ld $5,%got_disp(_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)($28)

move $4,$2

ld $2,%call16(_ZNSolsEPFRSoS_E)($28)

move $25,$2

1: jalr $25

nop

li $16,1 # 0x1

daddiu $2,$fp,144

move $4,$2

ld $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED1Ev)($28)

move $25,$2

1: jalr $25

nop

move $2,$16

b .L21

nop

move $16,$4

daddiu $2,$fp,136

move $4,$2

ld $2,%call16(_ZNSaIcED1Ev)($28)

move $25,$2

1: jalr $25

nop

move $2,$16

move $4,$2

ld $2,%call16(_Unwind_Resume)($28)

move $25,$2

1: jalr $25

nop

move $16,$4

daddiu $2,$fp,104

move $4,$2

ld $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED1Ev)($28)

move $25,$2

1: jalr $25

nop

b .L10

nop

move $16,$4

daddiu $2,$fp,72

move $4,$2

ld $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED1Ev)($28)

move $25,$2

1: jalr $25

nop

b .L10

nop

move $16,$4

daddiu $2,$fp,40

move $4,$2

ld $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED1Ev)($28)

move $25,$2

1: jalr $25

nop

b .L10

nop

move $16,$4

daddiu $2,$fp,8

move $4,$2

ld $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED1Ev)($28)

move $25,$2

1: jalr $25

nop

b .L10

nop

move $16,$4

.L10:

daddiu $2,$fp,144

move $4,$2

ld $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED1Ev)($28)

move $25,$2

1: jalr $25

nop

move $2,$16

move $4,$2

ld $2,%call16(_Unwind_Resume)($28)

move $25,$2

1: jalr $25

nop

.L21:

move $sp,$fp

ld $31,200($sp)

ld $fp,192($sp)

ld $28,184($sp)

ld $16,176($sp)

daddiu $sp,$sp,208

j $31

nop

std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > std::operator+<char, std::char_traits<char>, std::allocator<char> >(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, char const*):

daddiu $sp,$sp,-64

sd $31,56($sp)

sd $fp,48($sp)

sd $28,40($sp)

sd $16,32($sp)

move $fp,$sp

lui $28,%hi(%neg(%gp_rel(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > std::operator+<char, std::char_traits<char>, std::allocator<char> >(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, char const*))))

daddu $28,$28,$25

daddiu $28,$28,%lo(%neg(%gp_rel(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > std::operator+<char, std::char_traits<char>, std::allocator<char> >(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, char const*))))

sd $4,0($fp)

sd $5,8($fp)

sd $6,16($fp)

ld $5,8($fp)

ld $4,0($fp)

ld $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC1ERKS4_)($28)

move $25,$2

1: jalr $25

nop

ld $5,16($fp)

ld $4,0($fp)

ld $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6appendEPKc)($28)

move $25,$2

1: jalr $25

nop

b .L26

nop

move $16,$4

ld $4,0($fp)

ld $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED1Ev)($28)

move $25,$2

1: jalr $25

nop

move $2,$16

move $4,$2

ld $2,%call16(_Unwind_Resume)($28)

move $25,$2

1: jalr $25

nop

.L26:

ld $2,0($fp)

move $sp,$fp

ld $31,56($sp)

ld $fp,48($sp)

ld $28,40($sp)

ld $16,32($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,.L29

nop

lw $3,4($fp)

li $2,65535 # 0xffff

bne $3,$2,.L29

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

.L29:

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

//===========================================

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