//#include "stdafx.h" // might be required for the older versions of Visual Studio #ifdef __cplusplus #include <cstdio> #include <cassert> #else #include <stdio.h> #include <assert.h> #endif // C++ built-in data types mapping to assembler data types: // char data type is signed 8-bit integer (DB in assembler) // short data type is signed 16-bit integer (DW in assembler) // int data type is signed 32-bit integer (DD in assembler) short solution_for_grade_5(short x, short y, short z) { // Selected variant and expression: (write it here) short result; // Visual C++ inline assembler syntax: __asm { // Your Inline Assembler instructions for grade 5 go here // ::: mov [result], AX ; save the result assuming it is in the CPU register AX } return result; } short solution_for_grade_6(short x, short y, short z) { // Selected variant and expression: (write it here) short result; __asm { // Your Inline Assembler instructions for grade 6 go here // ::: mov [result], AX ; save the result } return result; } // ::: int main() { short first = 420; // Note the short data type range is -32768..32767 short second = -50; short third = 122; short result = solution_for_grade_5(first, second, third); printf("solution_for_grade_5(%d, %d, %d) = %d\n", first, second, third, result); // You can invoke solution functions several times // with different parameter values (e.g., to demonstrate branching). // ::: return 0; }
Write, Run & Share Assembly code online using OneCompiler's Assembly online compiler for free. It's one of the robust, feature-rich online compilers for Assembly language. Getting started with the OneCompiler's Assembly compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as Assembly
and start coding.
Assembly language(asm) is a low-level programming language, where the language instructions will be more similar to machine code instructions.
Every assembler may have it's own assembly language designed for a specific computers or an operating system.
Assembly language requires less execution time and memory. It is more helful for direct hardware manipulation, real-time critical applications. It is used in device drivers, low-level embedded systems etc.
Assembly language usually consists of three sections,
Data section
To initialize variables and constants, buffer size these values doesn't change at runtime.
bss section
To declare variables
text section
_start
specifies the starting of this section where the actually code is written.
There are various define directives to allocate space for variables for both initialized and uninitialized data.
variable-name define-directive initial-value
Define Directive | Description | Allocated Space |
---|---|---|
DB | Define Byte | 1 byte |
DW | Define Word | 2 bytes |
DD | Define Doubleword | 4 bytes |
DQ | Define Quadword | 8 bytes |
DT | Define Ten Bytes | 10 bytes |
Define Directive | Description |
---|---|
RESB | Reserve a Byte |
RESW | Reserve a Word |
RESD | Reserve a Doubleword |
RESQ | Reserve a Quadword |
REST | Reserve a Ten Bytes |
Constants can be defined using
CONSTANT_NAME EQU regular-exp or value
%assign constant_name value
%define constant_name value
Loops are used to iterate a set of statements for a specific number of times.
mov ECX,n
L1:
;<loop body>
loop L1
where n specifies the no of times loops should iterate.
Procedure is a sub-routine which contains set of statements. Usually procedures are written when multiple calls are required to same set of statements which increases re-usuability and modularity.
procedure_name:
;procedure body
ret