Re: [Mingw-users] Assembly language

[Robert W. <rwi...@sh...>]

---- Original Message ----- 
From: "Oscar Fuentes" <of...@wa...>
To: <min...@li...>
Cc: <rwi...@sh...>
Sent: Friday, April 25, 2003 9:35 PM
Subject: Re: [Mingw-users] Assembly language


> Robert Wishlaw <rwi...@sh...> writes:
> 
> > I am trying to port this snippet from the LCCWin32 compiler to MinGW32.
> >
> >         for (register int i=nArgs-1;i >=0; i--)
> >         {
> >             arg = argtable[i];
> >             asm("pushl %arg");
> >         }
> >
> > The inline assembly asm("pushl %arg"); is causing an error
> > s137.o(.text+0x53d):s137.c: undefined reference to `arg'
> >
> > Can someone please tell me what the correct syntax is for the
> > assembly statement?
> 
> http://gcc.gnu.org/onlinedocs/gcc-3.2.2/gcc/Extended-Asm.html

Thank you for this reference. It is exactly what I needed.

> 
> An example:
> 
> int main() {
>   int in = 10;
>   int out = 0;
>   asm("pushl %0" : : "r" (in));
>   asm("popl %0" : "=r" (out) : );
>   printf("%d\n", out);
> }
> 
> HTH

A great simple example.

Andy Ross sent me this

asm("pushl %0" : : "r" (arg));

You must be reading the same books.

Thank you again for your help.

Robert Wishlaw