FC_FCTL_FILL_SHIFT
#define FC_FCTL_FILL_MASK (0x3 << FC_FCTL_FILL_SHIFT)
#define FC_FCTL_FILL_0_BYTES (0x0 << FC_FCTL_FILL_SHIFT)
#define FC_FCTL_FILL_1_BYTES (0x1 << FC_FCTL_FILL_SHIFT)
#define FC_FCTL_FILL_2_BYTES (0x2 << FC_FCTL_FILL_SHIFT)
#define FC_FCTL_FILL_3_BYTES (0x3 << FC_FCTL_FILL_SHIFT)