Assembly

A Ankur in Mix (C++ and Assembly)

Mix (C++ and Assembly) Program to Find Reverse of an Array

This post explores how to reverse an array of integers using inline assembly within a C++ program. The program swaps elements from the start and end of the array using low-level assembly instructions. #include<iostream.h> #include<conio.h> void main() { int nos[5], x, y; cout << "\n Enter 5 numbers:"; int i, j; for(i = 0; i < 5; i++) { cin >> nos[i]; } for(i = 0, j = 4; i < 3; i++, j--) { x = nos[i]; y = nos[j]; _asm{ mov ax, x mov bx, y mov cx, ax mov ax, bx mov bx, cx mov x, ax mov y, bx } nos[i] = x; nos[j] = y; } cout << "\n Reverse:"; for(i = 0; i < 5; i++) { cout << nos[i] << " "; } getch(); }

Jul 26, 2015 · 1 min read

A Ankur in Mix (C++ and Assembly)

Mix (C++ and Assembly) Program to Check if String is Palindrome or not

This C++ program checks whether a given array of five integers is a palindrome (i.e., reads the same forwards and backwards) using inline 8086 assembly instructions. It utilizes basic comparison instructions and control flow to determine equality between symmetric elements. #include<iostream.h> #include<conio.h> void main() { int nos[5], x, y; cout << "\n Enter 5 numbers:"; int i, j; for (i = 0; i < 5; i++) { cin >> nos[i]; } for (i = 0, j = 4; i < 3; i++, j--) { x = nos[i]; y = nos[j]; _asm { mov ax, x mov bx, y cmp ax, bx jnz no } } cout << "\n Array is Palindrome."; goto end; no: cout << "\n Array is not palindrome."; end: getch(); }

Jul 25, 2015 · 1 min read

A Ankur in Mix (C++ and Assembly)

Mix (C++ and Assembly) Program to Search an Element in an Array

This C++ program demonstrates how to search for a specific element within an array of 10 integers using 8086 assembly instructions embedded inline. The program uses the cmp and jz instructions to perform the comparison and detect a match. #include<iostream.h> #include<conio.h> void main() { int nos[10], j, t; int i, p; cout << "\n Enter 10 numbers:"; for (i = 0; i < 10; i++) { cin >> nos[i]; } cout << "\n Enter number to be searched:"; cin >> j; for (i = 0; i < 10; i++) { p = i; t = nos[i]; _asm { mov ax, t // Load current array element mov bx, j // Load number to be searched cmp ax, bx // Compare current element with target jz out // If match found, jump to output } } cout << "\n No is not found."; goto end; out: cout << "\n Number is found at " << p + 1 << " th position"; end: getch(); }

Jul 24, 2015 · 1 min read

A Ankur in Mix (C++ and Assembly)

Mix (C++ and Assembly) Program to Add Two 16 bit Numbers

While high-level languages like C++ are well known for abstracting away low-level operations, sometimes it’s beneficial to peek under the hood to see how things really work at the machine level. In this post, we’ll explore a simple C++ program that incorporates inline assembly to add two 16-bit numbers. #include<iostream.h> #include<conio.h> #include<stdio.h> void main() { clrscr(); int a,b,c; cout<<"Enter First Number:"; cin>>a; cout<<"Enter Second Number:"; cin>>b; asm mov ax, a // Move first number into AX asm mov bx, b // Move second number into BX asm add ax, bx // Add BX to AX (binary addition) asm mov c, ax // Move result into variable 'c' cout<<"Result:"; cout<<c; getch(); }

Jul 23, 2015 · 1 min read

A Ankur in Mix (C++ and Assembly)

Mix (C++ and Assembly) Program to Add Two 16 bit Numbers (With DAA)

While high-level programming languages like C++ make arithmetic operations incredibly simple, delving into inline assembly offers valuable insights into how the CPU processes instructions under the hood. Hence in this post, we’ll walk through a simple program that uses both C++ and inline assembly to add two integer values. Additionally, we will carry out decimal adjust after addition.

Jul 22, 2015 · 1 min read

A Ankur in Mix (C++ and Assembly)

Mix (C++ and Assembly) Program to Subtract Two 16-bit Numbers (With DAS)

While modern high-level languages like C++ abstract away many low-level operations, sometimes it's useful to dive into assembly-level instructions for greater control and understanding. This example demonstrates subtraction using inline assembly in C++, with the addition of the DAS instruction to adjust the result for Binary Coded Decimal (BCD) operations. #include<iostream.h> #include<conio.h> #include<stdio.h> void main() { clrscr(); int a, b, c; cout << "Enter First Number:"; cin >> a; cout << "Enter Second Number:"; cin >> b; asm mov ax, a // Move 'a' into AX asm mov bx, b // Move 'b' into BX asm sub ax, bx // Subtract BX from AX asm das // Adjust AX for BCD subtraction asm mov c, ax // Store result in 'c' cout << "Result:"; cout << c; getch(); }

Jul 21, 2015 · 1 min read

A Ankur in Mix (C++ and Assembly)

Mix (C++ and Assembly) Program to Subtract Two 16 bit Numbers

While modern high-level languages like C++ abstract away many low-level operations, sometimes it's useful to get closer to the hardware to understand how things work under the hood. This example demonstrates how to subtract two 16-bit numbers using inline assembly in a simple C++ program. #include<iostream.h> #include<conio.h> #include<stdio.h> void main() { clrscr(); int a, b, c; cout << "Enter First Number:"; cin >> a; cout << "Enter Second Number:"; cin >> b; asm mov ax, a // Move 'a' into AX asm mov bx, b // Move 'b' into BX asm sub ax, bx // Subtract BX from AX asm mov c, ax // Store result in 'c' cout << "Result:"; cout << c; getch(); }

Jul 20, 2015 · 1 min read

A Ankur in Mix (C++ and Assembly)

Mix (C++ and Assembly) Program to Add Two 8 bit Numbers

This blog post will guide you through a C++ program that performs the addition of two numbers using inline assembly. While modern compilers provide high-level arithmetic operations, understanding inline assembly can help in optimizing performance and understanding low-level interactions with the CPU. Let's explore this step-by-step! #include<iostream.h> #include<conio.h> #include<stdio.h> void main() { clrscr(); short int a, b, c; cout << "Enter First Number: "; cin >> a; cout << "Enter Second Number: "; cin >> b; asm mov ax, a asm mov ah, 00h asm mov bx, b asm mov bh, 00h asm add al, bl asm mov c, ax cout << "Result: "; cout << c; getch(); }

Jul 19, 2015 · 1 min read

A Ankur in 8086

8086 Assembly Program to Find Reverse of an Array

In this blog post, we’ll explore how to reverse an array using an 8086 assembly language program. We will walk through the logic, the step-by-step execution, and provide a working code snippet to illustrate the process. Overall Process: The program initializes registers and sets up pointers to the source (ARR) and destination (REV_ARR) arrays. It processes each element of the original array, copying it in reverse order to the destination array. After processing all elements, the program terminates, leaving the reversed array in memory. 8086 Assembly Code:

Jul 18, 2015 · 1 min read

A Ankur in 8086

8086 Assembly Program to Check if String is Palindrome or not

A palindrome is a word, phrase, or sequence that reads the same forward and backward. This 8086 assembly program determines whether a given string is a palindrome by reversing the string and comparing it to the original. The program follows these steps: Initialize the Data Segment: Load the string to be checked. Reverse the String: Store the reversed string in another memory location. Compare the Original and Reversed Strings: Use CMPSB to compare byte-by-byte. Print the Result: Display whether the string is a palindrome or not.

Jul 17, 2015 · 1 min read