AVRtiny2313_ReferenciaC++

 #include<avr/io.h>
int main(void){
int x = 17;
int& ref_x = x;
ref_x = 33;
return 0;
}





 .file   "tiny2.cpp"
__SP_L__ = 0x3d
__SREG__ = 0x3f
__tmp_reg__ = 0
__zero_reg__ = 1

        .text
.global main
        .type   main, @function
main:
        push r28         ;                      // reserva YL en Pila y Stack = Stack -1
        push r29         ;                      // reserva YH en Pila y Stack = Stack -1
        in r28,__SP_L__  ;                      // YL = r28 = Stack-2 = SPL
        clr r29  ;                              // SPH = r29 = 0
        subi r28,lo8(-(-4))      ;              // SP = SPL-4  ---> puntal de referencia
        out __SP_L__,r28         ;              // SP == Y
/* prologue: function */
/* frame size = 4 */                            // marco de pila 4 bytes
/* stack size = 6 */                            // SP = SPL:SPH --> r28:r29 == YL:YH = Y --> YH:YL=SPH:SPL= SP
.L__stack_usage = 6                             // x es de 16 bits = 1 palabra
        ldi r24,lo8(17)  ;  tmp44,              // low(x)
        ldi r25,0        ;                      // hi(x)
        std Y+4,r25      ;  x, tmp44            // store hi(x) en SP+4
        std Y+3,r24      ;  x, tmp44            // store low(x) en SP+3
        movw r24,r28     ;  tmp45,              // r28=SPL=YL i.e.  r24 = SPL
        adiw r24,3       ;  tmp45,              // add (SP + 3) en R25:R24
        std Y+2,r25      ;  ref_x, tmp45        // store (SP+3) en Stack
        std Y+1,r24      ;  ref_x, tmp45        // idem
        ldd r24,Y+1      ;  tmp46, ref_x        // load (SP +3) desde Stack a r25:r24
        ldd r25,Y+2      ;  tmp46, ref_x        // idem
        ldi r18,lo8(33)  ;  tmp47,              // r19:r18 = 33
        ldb r19,0        ;                      // idem
        movw r30,r24     ; , tmp46              // Z = r31:r30 = r25:r24 => Z = (SP+3)
        std Z+1,r19      ;  *ref_x_1, tmp47     // store r19:r18=33 en Z+1 = (SP+4) y Z = (SP +3)
        st Z,r18         ;  *ref_x_1, tmp47     //  x esta en xH:xL = |(SP+4):(SP+3)|
        ldi r24,0        ;  D.1984              // r24 = 0
        ldi r25,0        ;  D.1984              // r25 = 0
/* epilogue start */
        subi r28,lo8(-(4))       ;              //  r28 = SP+4  // restaura Puntero de Pila
        out __SP_L__,r28         ;              //  Stack = Y+4
        pop r29  ;                              //  retira r29 y Stack = Stack +1
        pop r28  ;                              //  retira r28 y Stack = Stack +1 = RAMEND
        ret                                     // retorna
        .size   main, .-main
        .ident  "GCC: (GNU) 4.8.2"