Question

The objective of this project is to increase your understanding of data, address, memory contents, and strings. You are tasked to use MIPS assembly language instructions, assembler directives and system call to find how many times the G, A, M, E, C, O, C, K, and S letters occur within an input sentence, and then output the result using the format shown below.

Sample Input is:

The South Carolina Gamecocks football program represents the University of South Carolina in the sport of American football. The Gamecocks compete in the Football Bowl Subdivision of the National Collegiate Athletic Association (NCAA) and the Eastern Division of the Southeastern Conference. Will Muschamp currently serves as the team's head coach. They play their home games at Williams-Brice Stadium. Currently, it is the 20th largest stadium in college football.

Sample output is:

G: 7

A: 36

M: 13

E: 43

C: 21

O: 33

C: 21

K: 2

S: 27

The submitted program shall provide outputs in exactly the sequence and format shown above. To receive full credit, no additional superfluous outputs shall occur.

Output a histogram of the number of the occurrences of the letters G, A, M, E, C, O, C, K, and S within an input sentence:

G:#######

A: ####################################

M: #############

E: ###########################################

C: #####################

O: #################################

C: #####################

K: ##

S: ###########################

Answer 1

main:

push rbp

mov rbp, rsp

push rbx

sub rsp, 168

lea rax, [rbp-64]

mov rdi, rax

call std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string() [complete object constructor]

lea rax, [rbp-64]

mov rsi, rax

mov edi, OFFSET FLAT:_ZSt3cin

call std::basic_istream<char, std::char_traits<char> >& std::operator>><char, std::char_traits<char>, std::allocator<char> >(std::basic_istream<char, std::char_traits<char> >&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&)

lea rdx, [rbp-176]

mov eax, 0

mov ecx, 13

mov rdi, rdx

rep stosq

mov DWORD PTR [rbp-20], 0

.L3:

mov eax, DWORD PTR [rbp-20]

movsx rbx, eax

lea rax, [rbp-64]

mov rdi, rax

call std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::length() const

cmp rbx, rax

setb al

test al, al

je .L2

mov eax, DWORD PTR [rbp-20]

movsx rdx, eax

lea rax, [rbp-64]

mov rsi, rdx

mov rdi, rax

call std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::operator[](unsigned long)

movzx eax, BYTE PTR [rax]

movsx eax, al

sub eax, 48

movsx rdx, eax

mov edx, DWORD PTR [rbp-176+rdx*4]

add edx, 1

cdqe

mov DWORD PTR [rbp-176+rax*4], edx

add DWORD PTR [rbp-20], 1

jmp .L3

.L2:

mov DWORD PTR [rbp-24], 0

.L8:

cmp DWORD PTR [rbp-24], 25

jg .L4

mov eax, DWORD PTR [rbp-24]

cdqe

mov eax, DWORD PTR [rbp-176+rax*4]

test eax, eax

je .L5

mov DWORD PTR [rbp-28], 1

.L7:

mov eax, DWORD PTR [rbp-24]

cdqe

mov eax, DWORD PTR [rbp-176+rax*4]

cmp DWORD PTR [rbp-28], eax

jg .L6

mov esi, 35

mov edi, OFFSET FLAT:_ZSt4cout

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

add DWORD PTR [rbp-24], 1

jmp .L7

.L6:

mov esi, OFFSET FLAT:_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_

mov edi, OFFSET FLAT:_ZSt4cout

call 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> >&))

.L5:

add DWORD PTR [rbp-24], 1

jmp .L8

.L4:

lea rax, [rbp-64]

mov rdi, rax

call std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string() [complete object destructor]

mov eax, 0

jmp .L12

mov rbx, rax

lea rax, [rbp-64]

mov rdi, rax

call std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string() [complete object destructor]

mov rax, rbx

mov rdi, rax

call _Unwind_Resume

.L12:

add rsp, 168

pop rbx

pop rbp

ret

__static_initialization_and_destruction_0(int, int):

push rbp

mov rbp, rsp

sub rsp, 16

mov DWORD PTR [rbp-4], edi

mov DWORD PTR [rbp-8], esi

cmp DWORD PTR [rbp-4], 1

jne .L15

cmp DWORD PTR [rbp-8], 65535

jne .L15

mov edi, OFFSET FLAT:_ZStL8__ioinit

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

mov edx, OFFSET FLAT:__dso_handle

mov esi, OFFSET FLAT:_ZStL8__ioinit

mov edi, OFFSET FLAT:_ZNSt8ios_base4InitD1Ev

call __cxa_atexit

.L15:

nop

leave

ret

_GLOBAL__sub_I_main:

push rbp

mov rbp, rsp

mov esi, 65535

mov edi, 1

call __static_initialization_and_destruction_0(int, int)

pop rbp

ret