$ in GNU as assembler

[Laurent Pinchart]

>
>
>     What is the meaning of $ in the GNU as assembler when it is prefixed
>to a number. For example, what is the difference between
>
A $ prefixing a number means an immediate constant, as opposed to a 
memory address.

>mov     $0x53, %al
>
Move the value 0x53 to the %al register.

>mov     0x53, %al
>
Move the byte at memory address 0x53 (0x00000053) to the %al register.

Laurent Pinchart