#include <u.h>
#include <libc.h>

static uint getdword_n(void *mem, int n)
{
    STATIC uint tmp = 0;

    switch (n)
    {
    case 3:
        ((uchar*)&tmp)[1] = ((uchar*)mem)[2];
    case 2:
        ((uchar*)&tmp)[2] = ((uchar*)mem)[1];
    case 1:
        ((uchar*)&tmp)[3] = ((uchar*)mem)[0];
    default:
        break;
    }

    return tmp;
}

void
main(void)
{
	uint x;

	char buf[] = "xxxx";

	x = getdword_n(buf, 2);
	print("%x\n", x);
}