Sender: fabrice AT asim DOT lip6 DOT fr
Message-ID: <34795F4D.599A@trash.lip6.fr>
Date: Mon, 24 Nov 1997 12:04:45 +0100
From: Fabrice ILPONSE <fabrice AT asim DOT lip6 DOT fr>
MIME-Version: 1.0
To: djgpp users group <djgpp AT delorie DOT com>
Subject: Re: djgpp slow (source files)
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Precedence: bulk

Hi!

	Here are the code i've used.

	For gcc the command line : gcc -O2 -m486 -s prog.cpp -lv

	where libv.a is the librarie containing the function Xtest()
	
void Xtest()
{
    pushad;
    asm(
        "pushw %es\n"
        "movw  ScreenSeg,%es\n"
        "xorl %edi,%edi\n"
        "movl $32000,%ecx\n"
        ".lp:\n"
        "movw %ss:(%edi),%ax\n"
        "movw %ax,%es:(%edi)\n"
        "addl $2,%edi\n"
        "decl %ecx\n"
        "jnz .lp\n"
        "popw %es\n"
       );
    popad
}

	ScreenSeg is a selector allocated to 0xa00000 and defined as:

		short ScreenSeg asm("ScreenSeg");

	the gcc main prog:


#include "xmode.h"
#include <conio.h>
extern void Xtest();

main()
{Vmem *u;
 int a;
 XON(320,200);

 do { Color(0,0,30,0);
      Xtest();
      Color(0,0,0,0);
      WaitVBL();
      if (kbhit()) a=getch(); else a=0;
    } while (a!=27);

 return 0;
}


	the borland c prog:

#pragma inline
#include <conio.h>

#define M32
asm .386
void waitvbl(void)
{ asm {
            .lvbll000:
            mov dx,03dah
            in al,dx
            and al,8
            jz .lvbll000
            .lvbll001:
            mov dx,03dah
            in al,dx
            and al,8
            jnz .lvbll001

      }
}

void color(char O,char M,char N,char Q)
{ asm {     mov al,O
            mov dx,03c8h
            out dx,al
            mov dx,03c9h
            mov al,M
            out dx,al
            mov al,N
            out dx,al
            mov al,Q
            out dx,al
      }
}
main()
{int a;
 asm {mov ax,13h;int 10h}
 do {
     color(0,30,0,0);

 asm {mov ax,0a000h
      mov es,ax

#ifdef M32
      xor edi,edi
      mov ecx,32000
      .iii:
      mov ax,ss:[edi]
      mov word ptr es:[edi],ax
      add edi,2
      dec ecx
      jnz .iii
#else
      xor di,di
      mov cx,32000
      .iii:
      mov ax,ss:[di]
      mov word ptr es:[di],ax
      add di,2
      dec cx
      jnz .iii
#endif
     }
     color(0,0,0,0);
     waitvbl();
     if (kbhit()) a=getch(); else a=0;
    } while (a!=27);

 asm {mov ax,3;int 10h}
 return 0;
}

-- 
	^ ^ ^
	| | |
	+-+-+	Fabrice ILPONSE
	  |	<fabrice AT asim DOT lip6 DOT fr>
	  |
	  |
	  -