templates/Labv14.cpp

/*                 ‹ ¡®à â®à­ ï à ¡®â  14
       Ž¡ê¥¤¨­¥­¨¥ ª®¬ ­¤ ¤«ï ¨å ¯ à ««¥«ì­®£®  ¢ë¯®«­¥­¨ï
		   (®¯â¨¬¨§ æ¨ï ã஢­ï ª®¬ ­¤)
	 */

#include <stdio.h>
#include <conio.h>
void NullProc(void){}
void ExTime(void (*PP)(void))
{
   long far* pTime = (long*)0x46C;  //áç¥â稪 ⨪®¢
   long Time0, Time1, Time2, i;

   void (*NP)(void);
   NP = NullProc;
   Time0 = *pTime;
   for (i = 1; i<1000000L; i++)
   {
       NP();
       NP();
       NP();
       NP();
       NP();
       NP();
       NP();
       NP();
       NP();
       NP();
   }
   Time1 = *pTime;
   for (i = 1; i<1000000L; i++)
   {
       PP();
       PP();
       PP();
       PP();
       PP();
       PP();
       PP();
       PP();
       PP();
       PP();
   }
   Time2 = *pTime;
   Time2 = (((Time2 - Time1) - (Time1 - Time0))*(6553500L/1193180L));
   printf("%ld  ­á\n",Time2);
}
void P1(void)   //ॣ¨áâà®¢ë¥ § ¢¨á¨¬®á⨠¨¬¥îâáï
{
    asm{
	 mov ax,bx
	 mov dx,ax
	 stc
	 adc bx,cx
	 stc
	 sbb dx,ax

	 add ax,bx
	 mov cx,ax
	 sub dx,bx
	 mov bx,dx
       }
}
void P2(void)   //ॣ¨áâà®¢ë¥ § ¢¨á¨¬®á⨠ãáâà ­¥­ë
{
    asm{


		}
}
void P3(void)    //¤à㣨¥ ¯à¨ç¨­ë ­¥á¯ à¥­­®áâ¨
{
    asm{
	 mov cl,3       //­¥¯®á।á⢥­­ë© ®¯¥à ­¤
	 inc bx
	 mov cl,3
	 dec bx
	 mov cl,3
	 inc bx
	 mov cl,3
	 dec bx

	 inc bx        //ª®¬ ­¤ë ᤢ¨£  á cl ¢ ª ç¥á⢥ áç¥â稪 
	 ror ax,cl
	 dec bx
	 rol ax,cl

	 inc dx        //ª®¬ ­¤ë á ¯à¥ä¨ªá ¬¨ ¬. ¡. ¢ U - ª®­¢¥©¥à¥
	 mov ax,ds:[bx]
	 mov ax,ss:[bx]
	 mov ax,es:[bx]
	 mov ax,cs:[bx]
	 mov cl,3
	 mov cl,3
	 mov cl,3
	 dec dx

	 inc dx         //ª®¬ ­¤ë ᤢ¨£  ¬. ¡. ¢ U - ª®­¢¥©¥à¥
	 ror ax,1
	 rol ax,1
	 dec dx
       }
}
void P4(void)    //¯à¨ç¨­ë ­¥á¯ à¥­­®á⨠ãáâà ­¥­ë
{
    asm{

       }
}
void main(void)
{
    clrscr();
    printf("Program1 - ॣ¨áâà®¢ë¥ § ¢¨á¨¬®á⨠¨¬¥îâáï\n");
    ExTime(P1);
    printf("Program2 - ॣ¨áâà®¢ë¥ § ¢¨á¨¬®á⨠ãáâà ­¥­ë\n");
    ExTime(P2);
    printf("Program3 - ¤à㣨¥ ¯à¨ç¨­ë ­¥á¯ à¥­­®áâ¨\n");
    ExTime(P3);
    printf("Program4 - ¯à¨ç¨­ë ­¥á¯ à¥­­®á⨠ãáâà ­¥­ë\n");
    ExTime(P4);
    getch();
}

//‡ ¤ ­¨¥
// 1. “áâà ­¨â¥ ¯à¨ç¨­ë ­¥á¯ à¥­­®á⨠ª®¬ ­¤.
// 2. Ž¯à¥¤¥«¨â¥ ¨ ®¡êï᭨⥠¢à¥¬ï ¢ë¯®«­¥­¨ï äà £¬¥­â®¢ ¯à®£à ¬¬.
//
/*          <20><>€‚ˆ‹€ Ž<>š…„ˆ<E2809E>…<EFBFBD>ˆŸ ŠŽŒ€<C592>„
<EFBFBD>à®æ¥áá®à Pentium ¬®¦¥â ¢ë¯®«­ïâì ®¤­ã ¨«¨ ¤¢¥ ª®¬ ­¤ë ¢ ª ¦¤®¬
â ªâ¥. „«ï ¢ë¯®«­¥­¨ï ¢ ¯à®æ¥áá®à¥ ®¤­®¢à¥¬¥­­® ¤¢ãå ª®¬ ­¤ ®­¨
¤®«¦­ë 㤮¢«¥â¢®àïâì á«¥¤ãî騬 ãá«®¢¨ï¬:

-®¡¥ ª®¬ ­¤ë ¢ ¯ à¥ ®¡ï§ ­ë ¡ëâì <¯à®áâ묨> ¢ á¬ëá«¥, ®¯à¥¤¥«¥­­®¬
­¨¦¥;
-¬¥¦¤ã ­¨¬¨ ­¥ ¤®«¦­® ¡ëâì ॣ¨áâ஢ëå § ¢¨á¨¬®á⥩ ⨯  ç⥭¨¥- ¯®á«¥-
§ ¯¨á¨ ¨«¨ § ¯¨áì-¯®á«¥-§ ¯¨á¨ (read-after-write or write-after-wnte) ,
-­¨ ®¤­  ¨§ ª®¬ ­¤ ­¥ ¬®¦¥â ᮤ¥à¦ âì ᬥ饭¨¥ (displacement) ¨
­¥¯®á।á⢥­­ë© ®¯¥à ­¤;
-ª®¬ ­¤ë á ¯à¥ä¨ªá ¬¨ (§  ¨áª«î祭¨¥¬ OF ¢ ª®¬ ­¤ å ¯¥à¥å®¤  JCC)
¬®£ãâ ¢áâà¥ç âìáï ⮫쪮 ¢ U-ª®­¢¥©¥à¥.
    <20>®¤ ¯à®áâ묨 ª®¬ ­¤ ¬¨ ¯®­¨¬ îâáï ª®¬ ­¤ë, ã¯à ¢«¥­¨¥
¢ë¯®«­¥­¨¥¬ ª®â®àëå ®áãé¥á⢫ï¥âáï  ¯¯ à â­®, ¡¥§ ¨á¯®«ì§®¢ ­¨ï
¬¨ªà®ª®¬ ­¤, ¨ ª®â®àë¥ à¥ «¨§ãîâáï §  ®¤¨­ â ªâ. ˆáª«î祭¨¥¬ ïîâáï
ª®¬ ­¤ë ALU mem, reg ¨ ALU reg, mem, âॡãî騥 âà¥å ¨ ¤¢ãå ⠪⮢ ¤«ï
¢ë¯®«­¥­¨ï ᮮ⢥âá⢥­­®. ‘¯¥æ¨ «ì­ë¥  ¯¯ à â­ë¥ á।á⢠
¨á¯®«ì§ãîâáï ¤«ï ¨å ¢ë¯®«­¥­¨ï ª ª ¯à®áâëå ª®¬ ­¤. ‘«¥¤ãî騥
楫®ç¨á«¥­­ë¥ ª®¬ ­¤ë à áᬠâਢ îâáï ¢ ª ç¥á⢥ ¯à®áâëå ¨ ¬®£ãâ ¡ëâì
ᯠ७ë:
-mov reg, reg/mem/imnl
-mov mem, reg/imm     (ª®¬ ­¤ë ¯¥à¥¤ ç¨) ;
-alu reg, reg/mero/imm (ª®¬ ­¤ë  à¨ä¬¥â¨ç¥áª¨å
- alu meln , reg/ imm      ¨ «®£¨ç¥áª¨å ®¯¥à æ¨©) ;
- inc reg/mem                (ª®¬ ­¤ë ¨­ªà¥¬¥­â ,
- dec reg/mem               (¤¥ªà¥¬¥­â ) ;
-push reg/mem             (ª®¬ ­¤ë ®¡à é¥­¨ï
- pop reg                      (ª á⥪®¢®© ¯ ¬ïâ¨) ;
-lea reg,mem            (ª®¬ ­¤ë § £à㧪¨ ᥣ¬¥­â­ëå ॣ¨áâ஢) ;
-jmp/call/jcc near         (ª®¬ ­¤ë ¯¥à¥¤ ç¨ ã¯à ¢«¥­¨ï) ;
-n®à                             (¯ãáâ ï ª®¬ ­¤ ) .
     Š®¬ ­¤ë ¡¥§ãá«®¢­®© ¨ ãá«®¢­®© ¯¥à¥¤ ç ã¯à ¢«¥­¨ï ¬®£ãâ
®6쥤¨­ïâìáï ¢ ¯ àë, ¥á«¨ ®­¨ ¢áâà¥ç îâáï ¢ ª ç¥á⢥ ¢â®àëå ª®¬ ­¤ ¢ ¯ à¥.
Ž­¨ ­¥ ¬®£ãâ ¡ëâì ᯠ७ë á® á«¥¤ãî饩 ¯®á«¥¤®¢ â¥«ì­®© ª®¬ ­¤®©. ’ ª¦¥
ª®¬ ­¤ë SHIFT/ROT ᮠᤢ¨£®¬ ­  ®¤¨­ à §àï¤ ¨ SHIFT  ­  ¯à®¨§¢®«ì­®¥
ç¨á«® à §à冷¢ ¬®£ãâ ᯠਢ âìáï ⮫쪮 ª ª ¯¥à¢ë¥ ( ª®¬ ­¤ë ¢ ¯ à¥).
		       <20>¥£¨áâà®¢ë¥ § ¢¨á¨¬®áâ¨
   <20>¥£¨áâà®¢ë¥ § ¢¨á¨¬®áâ¨, § ¯à¥é î騥 ᯠਢ ­¨¥ ª®¬ ­¤, ¢ª«îç îâ
­¥ï¢­ë¥ § ¢¨á¨¬®á⨠ç¥à¥§ ॣ¨áâàë ¨«¨ ä« £¨, ­¥ 㪠§ ­­ë¥ ¢ ª®¬ ­¤¥.
‚ᥠ¢¨¤ë § ¢¨á¨¬®á⥩ ¯® ¤ ­­ë¬ ¬®£ãâ ¡ëâì ª« áá¨ä¨æ¨à®¢ ­ë ¯®
â¨¯ã  áá®æ¨ æ¨©: RAR - "ç⥭¨¥ ¯®á«¥ ç⥭¨ï", WAR - "§ ¯¨áì ¯®á«¥ ç⥭¨ï" ¨
WAW - "§ ¯¨áì ¯®á«¥ § ¯¨á¨", RAW - "ç⥭¨¥ ¯®á«¥ § ¯¨á¨". <20>¥ª®â®àë¥ ¨§
§ ¢¨á¨¬®á⥩ ¯® ¤ ­­ë¬ ¬®£ãâ ¡ëâì ãáâà ­¥­ë. RAR, ¯® áã⨠¤¥« ,
ᮮ⢥âáâ¢ã¥â ®âáãâáâ¢¨î § ¢¨á¨¬®á⥩, ¯®áª®«ìªã ¢ ¤ ­­®¬ á«ãç ¥ ¯®à冷ª
¢ë¯®«­¥­¨ï ª®¬ ­¤ ­¥ ¨¬¥¥â §­ ç¥­¨ï. „¥©á⢨⥫쭮© § ¢¨á¨¬®áâìî ï¥âáï
⮫쪮 "ç⥭¨¥ ¯®á«¥ § ¯¨á¨" (RAW), â ª ª ª ­¥®¡å®¤¨¬® ¯à®ç¨â âì
¯à¥¤¢ à¨â¥«ì­® § ¯¨á ­­ë¥ ­®¢ë¥ ¤ ­­ë¥,   ­¥ áâ àë¥.
    ‹¨è­¨¥ § ¢¨á¨¬®á⨠¯® ¤ ­­ë¬ ¯®ï¢«ïîâáï ¢ १ã«ìâ â¥ "§ ¯¨á¨ ¯®á«¥
ç⥭¨ï" (WAR) ¨ "§ ¯¨á¨ ¯®á«¥ § ¯¨á¨" (WAW). ‡ ¢¨á¨¬®áâì WAR á®á⮨⠢
⮬, çâ® ª®¬ ­¤  ¤®«¦­  § ¯¨á âì ­®¢®¥ §­ ç¥­¨¥ ¢ ï祩ªã ¯ ¬ï⨠¨«¨ ॣ¨áâà,
¨§ ª®â®àëå ¤®«¦­® ¡ëâì ¯à®¨§¢¥¤¥­® ç⥭¨¥. ‹¨è­¨¥ § ¢¨á¨¬®á⨠¯®ï¢«ïîâáï
¯® ­¥áª®«ìª¨¬ ¯à¨ç¨­ ¬: ­¥ ®¯â¨¬¨§¨à®¢ ­­ë© ¯à®£à ¬¬­ë© ª®¤, ®£à ­¨ç¥­¨¥
ª®«¨ç¥á⢠ ॣ¨áâ஢, áâ६«¥­¨¥ ª íª®­®¬¨¨ ¯ ¬ïâ¨, ­ «¨ç¨¥ ¯à®£à ¬¬­ëå
横«®¢.

*/