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Date: Mon, 23 Jan 2006 10:28:11 -0500
From: Diego Cueva <dcueva AT todo1 DOT com>
Subject: RE: Converting Intel code
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May be this help you:

int main(){
int val;
asm(
  "cli\n\t"
    "xorb %%al,%%al\n\t"
    "outb %%al,$0x43\n\t"
    "inb  $0x40,%%al\n\t"
    "movb %%al,%%bl\n\t"
    "inb  $0x40,%%al\n\t"
    "movb %%al,%%bh\n\t"
    "sti": "=b"(val): );

return 0;

}

The binary generated is the next:

1DDB:04D7 FA             cli
1DDB:04D8 30 C0          xor          al,al
1DDB:04DA E6 43          out          43,al
1DDB:04DC E4 40          in           al,40
1DDB:04DE 88 C3          mov          bl,al
1DDB:04E0 E4 40          in           al,40
1DDB:04E2 88 C7          mov          bh,al
1DDB:04E4 FB             sti
1DDB:04E5 89 D8          mov          ax,bx
1DDB:04E7 89 45 F8       mov          [di-08],ax
1DDB:04EA B8 00 00       mov          ax,0000
1DDB:04ED 00 00          add          [bx+si],al
1DDB:04EF 8B 5D FC       mov          bx,[di-04]
1DDB:04F2 C9             leave

Please review : 

Brennan's Guide to Inline Assembly
by Brennan "Bas" Underwood.

Att.
Diego.

-----Original Message-----
From: Cristiano [mailto:cristiano DOT pi AT NSquipo DOT it] 
Sent: Monday, January 23, 2006 09:34
To: djgpp AT delorie DOT com
Subject: Converting Intel code

I need to translate this (it should read the same timer used by Win API 
QueryPerformanceCount):

    unsigned short val;
    cli
    xor al,al
    out 43h,al
    in  al,40h
    mov bl,al
    in  al,40h
    mov bh,al
    mov [val],bx
    sti
    return val;

into AT&T syntax (for DJGPP). I wrote this:
asm(
  "cli\n\t"
    "xor %al,%al\n\t"
    "out %al,$0x43\n\t"
    "in  $0x40,%al\n\t"
    "mov %al,%bl\n\t"
    "in  $0x40,%al\n\t"
    "mov %al,%bh\n\t"
    "mov %bx,$val\n\t"
    "sti"
);
but I get: "Assembler messages: 20: Error: suffix or operands invalid
for 
`mov'".
Please, could somebody help me?

Thanks
Cristiano 



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