Message-Id:	<m0z9DfU-000S3uC@inti.gov.ar>
Comments:	Authenticated sender is <salvador AT natacha DOT inti DOT gov DOT ar>
From:	"Salvador Eduardo Tropea (SET)" <salvador AT inti DOT gov DOT ar>
Organization:	INTI
To:	rylan AT inbtekom DOT co DOT za, djgpp AT delorie DOT com
Date:	Wed, 19 Aug 1998 16:24:29 +0000
MIME-Version:	1.0
Subject:	Re: Accessing C #define in inline assembly
In-reply-to:	<6r53ca$afu$1@winter.news.erols.com>

"Rylan" <rylan AT intekom DOT co DOT za> wrote:

> In DJGPP inline assembly, how can  I access symbols "#defined" in the C file
> in which the relevant inline assembly occurs?
> 
> I have the following define:
> 
> #define TIMEOUT 9000
> 
> How can I access this in inline assembler:
> 
> __asm__  __volatile__
> ("
>   mov ??????,%cx
> ");

Easy use the "inmediate" constraint:

#define TIMEOUT 9000

int main(int argc, char *argv[])
{
 asm("movl %0,%%eax" : : "i" (TIMEOUT));
 return 0;
}

Gives:

	.file	"p.c"
gcc2_compiled.:
___gnu_compiled_c:
.text
	.p2align 2
.globl _main
_main:
	pushl %ebp
	movl %esp,%ebp
/APP
	movl $9000,%eax
/NO_APP
	xorl %eax,%eax
	jmp L1
	.align 2,0x90
L1:
	leave
	ret

SET
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Salvador Eduardo Tropea (SET). (Electronics Engineer)
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