Associate Professor of Computer Science
Components of a MIPS Program
This section reviews some of the basic components of a MIPS assembly language program. Consider the following sample program
# ex1.asm # This is an example that illustrates the various components of # an assembly language program. # .text # Program code goes in the text segment. This is an # example of an assembler directive. main: # default starting position add $t2, $t1, $t0 li $v0, 10 # These two lines serve as a halt statement. syscall # More on this later - just use them for now. .data grade: .word 50 code: .half 0x10 array: .byte 5, 70, -20, 65 name: .ascii "A string" message: .asciiz "Another string"
Instructions. The instruction set includes both the base machine instructions and the pseudo-instructions. We will learn the syntax as we deal with the various instructions.
Comments begin with a hash symbol (
Identifiers. A sequence of alphanumeric characters
Labels. An identifier at the beginning of the line followed by a colon. These are used to identify sections of code and for branching.
Are base-10 by default. Hexadecimal values are denoted by preceding the value with
A string of text is enclosed in double quotes. The usual escape sequences from C can be used: (