What's wrong with my code?

[-------owned-------]

#include <iostream.h>
#include <stdlib.h>
int main() {
int i;
int a = 1;
asm( 
"MOV i, a"
);
cout << "i";   
system("PAUSE");
}

I tried to use "inline assembly", please note that I barely know ASM at all, I don't know if my ASM is correct. I'm using Dev-C++ (Uses GCC, aye?).

Thanks,
Adam.

 

[cp]

asm(
"MOV i, a"
);

Don't you have to concatenate the variable "a" instead of putting it in the string itself?

cout << "i";

That will output the actual letter, "i", if I'm not mistaken.

http://en.wikipedia.org/wiki/Inline_assembler

^Some examples there.

 

[-------owned-------]

asm(
"MOV i, a"
);

Don't you have to concatenate the variable "a" instead of putting it in the string itself?

cout << "i";

That will output the actual letter, "i", if I'm not mistaken.

http://en.wikipedia.org/wiki/Inline_assembler

^Some examples there.

Yeah, I realised that I had put "'s, lol.
However, I get an error from the assembly: too many memory references for ´mov ´

 

[santa clause]

Ok, your code also lacks in cross-platform ability.

Don't do system(...). Use a method such as getchar(), cin.ignore()/get() for ending a program. You system() arguments are platform dependent.

As for your, ASM query. I am no pro at ASM but. You should.

MOV 1 %eax
MOV %eax 0

Copy a's value into eax, then copy eax's value into i. This is not tested.

 

[Swan]

I have no clue with ASM, but I found a good tutorial for you:

http://www.codeproject.com/KB/cpp/edujini_inline_asm.aspx

Here is something along the lines of what you want:

#include <iostream>
#include <stdlib.h>

int main()
{
    int no = 100, val ;
        asm ("movl %1, %%ebx;"
             "movl %%ebx, %0;"
             : "=r" ( val )        /* output */
             : "r" ( no )         /* input */
             : "%ebx"         /* clobbered register */
         );


    std::cout << val;

    return 0;
}

(taken from the tutorial in the link posted above)

 

[-------owned-------]

I have no clue with ASM, but I found a good tutorial for you:

http://www.codeproject.com/KB/cpp/edujini_inline_asm.aspx

Here is something along the lines of what you want:

#include <iostream>
#include <stdlib.h>

int main()
{
    int no = 100, val ;
        asm ("movl %1, %%ebx;"
             "movl %%ebx, %0;"
             : "=r" ( val )        /* output */
             : "r" ( no )         /* input */
             : "%ebx"         /* clobbered register */
         );


    std::cout << val;

    return 0;
}

(taken from the tutorial in the link posted above)

Thanks.