This blog post will guide you through a MASM (Microsoft Macro Assembler) program that performs the addition of two 8-bit numbers. While this is a fundamental operation, it demonstrates crucial assembly programming concepts such as data handling, register usage, and memory storage. Let’s dive in!
Assembly Code
.model small
.data
a db 09h
b db 02h
c dw ?
.code
main proc
mov ax, @data
mov ds, ax
mov al, a
mov bl, b
add al, bl
mov ah, 0
mov c, ax
int 3 ; Breakpoint interrupt
mov ax, 4C00h ; Exit program
int 21h
main endp
end main
Here is implementation of Code generation stage of complier in C++. You have to provide input in AIP.TXT file and the output will be stored in ANOP.TXT file.
A macro processor is a fundamental system program designed to streamline the programming process by replacing macro instructions within a source code with their pre-defined sequences of statements. This implementation provides a basic macro processor written in C.
This C program functions by reading an assembly language program that may contain macro definitions and macro calls. The input assembly code is expected to be provided in a file named MACIN.TXT. The core functionality of this processor involves:
Macro Definition Detection: Identifying and parsing macro definitions within the input source code.
Macro Definition Storage: Storing the identified macro definitions in a dedicated data structure known as the Macro Definition Table (MDT).
Macro Expansion: When macro calls are encountered in the input, the processor retrieves the corresponding definition from the MDT and substitutes the macro call with the stored sequence of assembly language statements.
The final expanded assembly code, with all macro calls replaced by their respective bodies, is then written to an output file named MACOUT.TXT. This process effectively automates the expansion of commonly used code blocks, reducing redundancy and improving code readability and maintainability.
In this blog post, we’ll delve into the world of assembly language programming using the 8086 microprocessors. We’ll explore a practical example: creating an assembly program to determine the largest number from a given set of values.
This C++ program demonstrates how to find the largest element from a set of five integers using 8086 assembly instructions embedded directly into the code. The inline assembly helps perform comparisons and updates the result with the highest value found.
This post demonstrates how to sort an array of integers using inline assembly in C++. Here, we perform sorting in ascending order by comparing and swapping adjacent elements using embedded assembly within a C++ program.
#include<iostream.h>
#include<conio.h>
void main()
{
int a[5], x, y;
int i, j;
cout << "\n Enter 5 Numbers:";
for(i = 0; i < 5; i++)
{
cin >> a[i];
}
//Sorting
for(i = 0; i < 4; i++)
{
for(j = 0; j < 4; j++)
{
x = a[j];
y = a[j + 1];
_asm {
mov ax, x
mov bx, y
cmp ax, bx
jl nxt
mov cx, ax
mov ax, bx
mov bx, cx
mov x, ax
mov y, bx
}
nxt:
a[j] = x;
a[j + 1] = y;
}
}
cout << "\n Sorted Array:";
for(i = 0; i < 5; i++)
cout << a[i] << " ";
getch();
}
