From:	radon AT swipnet DOT se (Rikard Björklind)
Newsgroups:	comp.os.msdos.djgpp
Subject:	asm code
Date:	Sun, 25 Jan 1998 09:38:55 GMT
Organization:	A customer of Tele2
Lines:	52
Message-ID:	<34cb0769.598790@nntpserver.swip.net>
NNTP-Posting-Host:	nn1.swip.net
Cache-Post-Path:	nn1!s-298159 AT dialup178-4-2 DOT swipnet DOT se
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Hi I'm trying to make a little proggy in DJGPP, and I'm learning this
AT&T syntax...  now the stuff doesn't work!! I think it should be easy
for you to see what I', doing wrong, the source is below.. 
The compile error is on the clobbering list, about 20 messages about
some numbers after the '%'.
If you know what's wrong, please help me... =)

--------------------------

#include <stdio.h>

unsigned char dbuffer[64000];

void smooth(unsigned char *bitmap)
{
//"smoothl:\n\t"
asm(    "movb    $0,%ah\n\t"
        "movb    -321(%edi),%al\n\t"
        "addb    -320(%edi),%al\n\t"
        "adcb    0,%ah\n\t"
        "addb    -319(%edi),%al\n\t"
        "adcb    0,%ah\n\t"
        "addb    -1(%edi),%al\n\t"
        "adcb    0,%ah\n\t"
        "addb    1(%edi),%al\n\t"
        "adcb    0,%ah\n\t"
        "addb    319(%edi),%al\n\t"
        "adcb    0,%ah\n\t"
        "addb    320(%edi),%al\n\t"
        "adcb    0,%ah\n\t"
        "addb    321(%edi),%al\n\t"
        "adcb    0,%ah\n\t"

        "shr     %eax,3\n\t"
        "movb    (%edi),al\n\t"

        "inc     %edi\n\t"
        "dec     %ecx\n\t"
        "jnz     smoothl\n\t"
        :
        : "c"(63360), "a" (0), "D" (bitmap+320)
        : "%eax", "%ebx", "%ecx", "%edx", "%edi");
}

int main()
{
smooth(&dbuffer);
return 0;
}

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