struct foo {
        int a:2;
};


struct bar {
        unsigned int a:2;
};

int test(struct foo *foo, struct bar *bar)
{
        if (foo->a == 0x3)
                return 1;
        if (bar->a == 0x3)
                return 2;

        return 0;
}




Disassembly of section .text:

00000000 <test>:
   0:	e5d10000 	ldrb	r0, [r1]
   4:	e2000003 	and	r0, r0, #3
   8:	e3500003 	cmp	r0, #3
   c:	03a00002 	moveq	r0, #2
  10:	13a00000 	movne	r0, #0
  14:	e12fff1e 	bx	lr