Introduction to Assembly Language
Assembly Language is a low-level programming language. It helps in understanding the programming language to machine code. In computer, there is assembler that helps in converting the assembly code into machine code executable. Assembly language is designed to understand the instruction and provide to machine language for further processing. It mainly depends on the architecture of the system whether it is the operating system or computer architecture.
Assembly Language mainly consists of mnemonic processor instructions or data, and other statements or instructions. It is produced with the help of compiling the high-level language source code like C, C++. Assembly Language helps in fine-tuning the program.
Why is Assembly Language Useful?
Assembly language helps programmers to write the human-readable code that is almost similar to machine language. Machine language is difficult to understand and read as it is just a series of numbers. Assembly language helps in providing full control of what tasks a computer is performing.
Find the below steps to print “Hello world” in Windows
- Open the notepad.
- Write below code
add esp, 4
db 'Hello, World!', 10, 0
- Save the file with any name example XYZ.asm, the extension should be “.asm”.
- The above file needs to compile with the help of assembler that is NASM (Netwide Assembler).
- Run the command nasm –f win32 XYZ.asm
- After this, Nasm creates one object file that contains machine code but not the executable code that is XYZ.obj
- To create the executable file for windows Minimal GNU is used that provides the GCC compiler.
- Run the command gcc –o XYZ.exe XYZ.obj
- Execute the executable file now “XYZ”
- It will show the output as “Hello, world”.
Why you should learn Assembly Language?
The learning of assembly language is still important for programmers. It helps in taking complete control over the system and its resources. By learning assembly language, the programmer is able to write the code to access registers and able to retrieve the memory address of pointers and values. It mainly helps in speed optimization that increase efficiency and performance.
Assembly language learning helps in understanding the processor and memory functions. If the programmer is writing any program that needs to be a compiler that means the programmer should have a complete understanding of the processor. Assembly language helps in understanding the work of processor and memory. It is cryptic and symbolic language.
Assembly Language helps in contacting the hardware directly. This language is mainly based on computer architecture and it recognizes the certain type of processor and its different for different CPUs. Assembly language refers as transparent compared to other high-level languages. It has a small number of operations but it is helpful in understanding the algorithms and other flow of controls. It makes the code less complex and easy debugging as well.
The features of the assembly language are mentioned below:
- It can use mnemonic than numeric operation code and it also provides the information of any error in the code.
- This language helps in specifying the symbolic operand that means it does not need to specify the machine address of that operand. It can be represented in the form of a symbol.
- The data can be declared by using decimal notation.
The assemblers are used to translate the assembly language into machine language. There are two types of assembler are:
- Single-pass assembler: A single assembler pass is referred as the complete scan of source program input to assembler or equivalent representation and translation by the statement on the basis of statement called as single pass assembler or one pass translation. It isolates the label, mnemonics and operand field of the system. It validates the code instructions by looking it up in mnemonic code table. It enters the symbol found in the label field and the address of the text available machine word into the symbol table. This pass is fast and effected, and no need to construct the intermediate code.
- Multi-pass assembler: In this, an assembler goes through assembly language several times and generates the object code. In this last pass is called a synthesis pass and this assembler requires any form of an intermediate code to generate each pass every time. It is comparatively slower than single pass assembler but there can be some actions that can be performed more than once means duplicated.
Advantages and Disadvantages
Mentioned are some advantages and disadvantages:
Below are the advantages:
- It allows complex jobs to run in a simpler way.
- It is memory efficient, as it requires less memory.
- It is faster in speed, as its execution time is less.
- It is mainly hardware oriented.
- It requires less instruction to get the result.
- It is used for critical jobs.
- It is not required to keep track of memory locations.
- It is a low-level embedded system.
Below mentioned are the disadvantages:
- It takes a lot of time and effort to write the code for the same.
- It is very complex and difficult to understand.
- The syntax is difficult to remember.
- It has a lack of portability of program between different computer architectures.
- It needs more size or memory of the computer to run the long programs written in Assembly Language.
Assembly language is very important for understanding the computer architecture and programs for the programmers. The programmers mainly used many other programming languages for application development and software but assembly language is also important. It helps programmers to achieve a lot if they implement the assembly language. Assemblies contain a lot of metadata that is version number, localization details, and other product details. It is an important part and provided to the user after digitally signed.
If an individual wants to know how the system works and processor as well then assembly language is the one that solves the purpose. It helps in all the aspects from understanding the algorithm of the program to the processor working and registering the registers of the computer. It depends on individual choice with which language to continue.
This has been a guide to What is Assembly Language. Here we have discuss the Features, Advantages, and Disadvantages of Assembly Language. You can also go through our other suggested articles to learn more –