Шаблон ассемблерных функций FASM

;Ниже показан шаблон ассемблерного кода (компилируется).
;В функции нужно добавить недостающий код.

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]





        ret
endp



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





        mov  eax, arr
        ret
endp


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

; Решение на FASM



include 'win32a.inc'



format      MS COFF



public   _RGB                   as '__RGB@12'

public   _decomposite_RGB       as '__decomposite_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  _decomposite_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

       mov  eax, arr
       ret
endp


section '.data' data readable writeable
;-----------------------------------------------------------




   arr   dd   4 dup(111111)






; Решение на Си



#include     <stdio.h>
#include   <windows.h>




int nArr[4],
    nRGB;


int     _RGB(int R, int G, int B);
int  asm_RGB(int R, int G, int B);

///////////////////////////////////////////////////////
int main()                                           //
{

    nRGB = asm_RGB(11, 22, 33);

    printf("nRGB = %d\n", nRGB);
}



///////////////////////////////////////////////////////
int asm_RGB(int R, int G, int B)                     //
{

    int nRes = 0;


  __asm
    {

         mov eax, B
         shl eax, 8
         add eax, G
         shl eax, 8
         add eax, R
         mov nRes, eax
    }

return nRes;
}




///////////////////////////////////////////////////////
int _RGB(int R, int G, int B)                        //
{

     int nRes = 0;

     nRes = nRes  | B;
     nRes = nRes << 8;

     nRes = nRes  | G;
     nRes = nRes << 8;

     nRes = nRes  | R;

return nRes;
}



;Интерфейс на Си




#include     <stdio.h>
#include   <windows.h>


extern "C"
{

    int   __stdcall _RGB(  int, int, int);
    int*  __stdcall _decomposite_RGB(int);
}


///////////////////////////////////////////////////////
int main()                                           //
{

    int n = RGB(11, 22, 33);

    printf("_RGB = %d \n", _RGB(11, 22, 33));
    printf(" RGB = %d \n",  n);

    int  *pn = _decomposite_RGB(2168331);

    printf(" arr[0] = %d \n",  pn[0]);
    printf(" Red    = %d \n",  pn[1]);
    printf(" Green  = %d \n",  pn[2]);
    printf(" Blue   = %d \n",  pn[3]);


return 0;
}