FS
#define FS 9
FS,
#define FS (HOST_FS * sizeof(long))
#define FS(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) | (_v))
#define FS(lower_name, fs_name, upper_name) \
#define FS(name) \
#define FS 14 * 8
enum which_base { FS, GS };