From:	Niklas_Pson AT nosmam DOT hotmail DOT com (Niklas Pettersson)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Help!! Inline asm with DJGPP
Date:	5 Jul 2001 21:33:54 GMT
Organization:	Lund Institute of Technology, Sweden
Lines:	34
Message-ID:	<90D5EC920NiklasPsonnospamhotm@130.235.20.4>
NNTP-Posting-Host:	npedt97.univ.vxu.se
User-Agent:	Xnews/03.04.11
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Hello!

I have a tiny program that just wont compile.. What's wrong with the code?
(I'm using inline asm as a help when optimizing a function)
I'm quite good with assembler but a complete idiot when it comes to inline 
assemby syntax =)

Error messages:

test2.cpp: In function `int main()':
test2.cpp:17: Invalid `asm' statement:
test2.cpp:17: fixed or forbidden register 2 (cx) was spilled for class 
CREG.

The Code:

int main()
{
   unsigned char *src_cur_line_pos = new unsigned char [100];
   unsigned char *dest_cur_line_pos = new unsigned char [100];
   unsigned char c2 = 25;

   asm
   (
     "  cld ; "
     "  rep ; "
     "  movsl ; "
     : /* No output */
     : "S" (src_cur_line_pos),
       "D" (dest_cur_line_pos),
       "c" (c2)
     : "%ecx", "%esi", "%edi"
   );
}

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