How to set a variable in GCC with Intel syntax inline assembly?

Question

Why doesn\'t this code set temp to 1? How do I actually do that?

int temp;
__asm__(
    \".intel_syntax;\"
    \"mov %0, eax;\"
    \"mov eax, %         


        

Answer 1

This code does what you are trying to achieve. I hope this helps you:

#include 

int main(void)
{
    /* Compile with C99 */
    int temp=0;

    asm
    (   ".intel_syntax;"
        "mov %0, 1;"
        ".att_syntax;"
        : "=r"(temp)
        :                   /* no input*/
    );
    printf("temp=%d\n", temp);
}