MS COFF (FASM)

include    'win32a.inc'


format      MS COFF


public     _RGB                     as '__RGB@12'
public     _decomposition_RGB       as '__decomposition_RGB@4'



section   '.text' code readable executable
;/////////////////////////////////////////////////////////////
proc   _RGB   red, green, blue                             ;//

        mov  eax , [green]
        mov  ebx , [blue]

        shl  eax  ,  8
        shl  ebx  , 16
        add  eax  , ebx
        add  eax  ,[red]
        ret
endp



;/////////////////////////////////////////////////////////////
proc   _decomposition_RGB   color                           ;//


        mov   ebx, [color]
        mov   eax, 0
        mov   al, bl
        mov  [arr +  4], eax   ; Red
        shr   ebx, 8
        mov   al, bl
        mov  [arr +  8], eax   ; Green
        shr   ebx, 8
        mov   al, bl
        mov  [arr + 12], eax   ; Blue

        shr   ebx, 8
        mov  [arr], ebx        ; То, что хранится в неиспользуемом байте
        mov   eax , arr
        ret
endp


section '.data' data readable writeable
;-------------------------------------------------------------     Создание переменных:
   arr   dd   4 dup(333)