sys/test: add more tests for bitfields

Add tests for issue #1542

The correct results are obtained with the following program:

struct foo {
	unsigned char	f0;
	unsigned int	f1:4;
	unsigned short	f2:4;
};

struct bar {
	char f0;
	struct foo foo;
};

int main() {
	struct bar y;
	memset(&y, 0, sizeof(y));
	y.f0 = 0x12;
	y.foo.f0 = 0x34;
	y.foo.f1 = 0x56;
	y.foo.f2 = 0x78;
	int i;
	for (i = 0; i < sizeof(y); i++)
		printf("%02x", ((unsigned char*)&y)[i]);
	printf("\n");
}

0 files changed, 0 insertions, 0 deletions