__bs_rs
#define bus_space_read_1(t, h, o) __bs_rs(1,(t),(h),(o))
#define bus_space_read_2(t, h, o) __bs_rs(2,(t),(h),(o))
#define bus_space_read_4(t, h, o) __bs_rs(4,(t),(h),(o))
#define bus_space_read_8(t, h, o) __bs_rs(8,(t),(h),(o))
#define bus_space_read_1(t, h, o) __bs_rs(1,t,h,o)
#define bus_space_read_2(t, h, o) __bs_rs(2,t,h,o)
#define bus_space_read_4(t, h, o) __bs_rs(4,t,h,o)
#define bus_space_read_8(t, h, o) __bs_rs(8,t,h,o)
#define bus_space_read_stream_2(t, h, o) __bs_rs(s_2,t,h,o)
#define bus_space_read_stream_4(t, h, o) __bs_rs(s_4,t,h,o)
#define bus_space_read_stream_8(t, h, o) __bs_rs(s_8,t,h,o)
#define bus_space_read_1(t, h, o) __bs_rs(1,(t),(h),(o))
#define bus_space_read_2(t, h, o) __bs_rs(2,(t),(h),(o))
#define bus_space_read_4(t, h, o) __bs_rs(4,(t),(h),(o))
#define bus_space_read_8(t, h, o) __bs_rs(8,(t),(h),(o))