Datatypes #
The string types #
The first set of built in data types are the two that you have already learned: ascii and asciz. To review, both ascii and asciz encode ASCII characters to their integer equivalents. The asciz directive adds a null character to the end of the string.
The integer types #
In the data section you can also specify integers that will be loaded with the program. In addition, you can also specify the amount of space that the integer consumes. The possible types are:
- .byte: 1 byte
- .short: 2 bytes
- .word: 4 bytes
- .quad: 8 bytes
- .octa: 16 bytes
Example of assignments #
.data
label1: .byte 0x44, 0x22, 0x11 @ Loads
@ addr+0: 0x44
@ addr+1: 0x22
@ addr+2: 0x11
label2: .short 0x44, 0x22, 0x11 @ Loads
@ addr+0: 0x0044
@ addr+2: 0x0022
@ addr+4: 0x0011
label3: .word 0x44, 0x22, 0x11 @ Loads
@ addr+0: 0x00000044
@ addr+4: 0x00000022
@ addr+8: 0x00000011