your assignment is to write an assembly language program which read a string and print it in uppercase. this program asks the user to enter a string, which is subsequently displayed in uppercase. it is important to first ensure that string to be converted is in the a-z range. the program does not recognize any space, symbols or any kind of punctuation marks. any time the user enters any of this character the program is going to repeatedly ask for the valid string. an example execution of your program could be: please enter your string: 1winter invalid entry! please enter your string: summer your capitalized string:summer submit your ha8-main. s file on blackboard for this assignment.

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06-12-2022
Computers and Technology

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your assignment is to write an assembly language program which read a string and print it in uppercase. this program asks the user to enter a string, which is subsequently displayed in uppercase. it is important to first ensure that string to be converted is in the a-z range. the program does not recognize any space, symbols or any kind of punctuation marks. any time the user enters any of this character the program is going to repeatedly ask for the valid string. an example execution of your program could be: please enter your string: 1winter invalid entry! please enter your string: summer your capitalized string:summer submit your ha8-main. s file on blackboard for this assignment.

Sagot :

z', %al

ja next ; if not in range, jump to "next"

subb

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Tutorconsortium618idn Tutorconsortium618idn · Answer 1 · 2022-12-15T08:41:09-05:00

The program starts by printing the prompt message, then reads the input string from the user using the read system call.

How to write assembly program?

Here is an example of an assembly language program that reads a string and prints it in uppercase:

.section .data

prompt:

.ascii "Please enter your string: "

.section .text

.globl _start

_start:

; print the prompt

movl $4, %eax ; system call number for write

movl $1, %ebx ; file descriptor for stdout

movl $prompt, %ecx ; address of the prompt

movl $17, %edx ; length of the prompt

int $0x80 ; invoke the system call

; read the input string

movl $3, %eax ; system call number for read

movl $0, %ebx ; file descriptor for stdin

movl $input, %ecx ; address of the input buffer

movl $128, %edx ; maximum length of the input string

int $0x80 ; invoke the system call

; check the input string and convert to uppercase

movl $input, %esi ; point to the input string

movl $output, %edi ; point to the output buffer

loop:

lodsb ; load the next character from the input string

cmpb $0, %al ; check for the end of the string

je done ; if end of string, jump to "done"

cmpb

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