Data Types and Storage in Assembly Language
Assembly language programs use a variety of data types to represent different kinds of data. The most common data types in assembly language are:
- Integer: Integers are whole numbers, such as 10, -23, and 123456789.
- Floating-point: Floating-point numbers are numbers that can have fractional parts, such as 3.14159 and 1.23456789E10.
- Character: Characters are individual letters, numbers, and symbols, such as 'A', '1', and '$'.
- String: Strings are sequences of characters, such as "Hello, world!" and "1234567890".
Storage of Data in Assembly Language
Assembly language programs store data in memory. Memory is divided into bytes, and each byte can store a single character. Words are two bytes long and can store a single integer or floating-point number. Double words are four bytes long and can store two integers or one floating-point number.
Variables of different data types
The following assembly language instructions declare variables of different data types:
Variables into registers
The following assembly language instructions load the values of the variables into registers:
Print the values of the variables to the console
The following assembly language instructions print the values of the variables to the console:
Data types define the nature of data, such as integers or characters, and storage involves allocating memory for variables using directives like dd for integers or db for characters. Memory addressing is crucial, specifying locations through registers or direct addressing modes, and constants, registers, and stack and heap memory are used for efficient data manipulation and storage.