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cassemblyvisual-c++-2010-express
Shambavi
Shambavi

Reputation: 319

How do I resolve error C2059: syntax error : '__asm' in Visual C++ 2010 Express

The file in which there is inline asm code is of the form xyz.c I'm using Visual C++ 2010 Express IDE. I get the error mentioned in the title. Any help is appreciated! Thanks!

My code roughly looks like this.

#include "xyz.h"

/*
; Multi-line comments
;
*/

__asm{
    Assembly code
}
 /*
; Multi-line comments
;
*/
.
.
.

__asm{
    Assembly code
}
 /*
; Multi-line comments
;
*/

__asm{
    Assembly code
}

Upvotes: 0

Views: 2602

Answers (2)

Tinmarino
Tinmarino

Reputation: 4041

This example works for me : 

#include <windows.h>
#include <iostream>

using namespace std;

int Add(int x, int y){
    asm(
          "addl %1, %0"
          : "=r"(x)
          : "m"(y), "0"(x)
    );
return x;
}


int main ()
{
    int x,y;

    cout<<"Enter first number\n";
    cin>>x; //enter first number
    cout<<"Enter second number\n";
    cin>>y; //enter second number

    cout<<Add(x,y)<<endl;

return 0;

}

You can see the different syntax. But the asm{} or __asm__{} or whatever with {} does not work with minGW, only with visual studio apparently.

Upvotes: 0

Bo Persson
Bo Persson

Reputation: 92261

You can not put the asm code (or any other code) directly into the global scope. You have to put it inside a function.

void f()
{
    __asm {
        Some code
    }
}

Upvotes: 2

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