#include <stddef.h>
#include <stdint.h>

#define ALIGNEDP(x) __attribute__((aligned(x),packed))
#define ALIGNED(x) __attribute__((aligned(x)))


struct  s1 {
            uint32_t    a;
            uint16_t    b;
            uint32_t    c;
            char        d ALIGNED(16/__CHAR_BIT__);
            char        e ALIGNED(16/__CHAR_BIT__);
        } ALIGNEDP(16/__CHAR_BIT__);

typedef struct s1   s1_t;

void    main(void)
{
    volatile    int i,j,k;

    i = sizeof(s1_t);
    j = offsetof(struct s1,d);
    k = offsetof(struct s1,e);
}