__attribute__((naked)) function attribute

__attribute__((naked)) int add(int i, int j); /* Declaring a function with __attribute__((naked)). */

__attribute__((naked)) int add(int i, int j)
{
    __asm("ADD r0, r1, #1"); /* Basic assembler statements are supported. */

/*  Parameter references are not supported inside naked functions: */
/*  __asm (
    "ADD r0, %[input_i], %[input_j]"       /* Assembler statement with parameter references */
    :                                      /* Output operand parameter */
    : [input_i] "r" (i), [input_j] "r" (j) /* Input operand parameter */
    );
*/

/*  Mixing C code is not supported inside naked functions: */
/*  int res = 0;
    return res; 
*/

}