diff options
Diffstat (limited to 'gcc/optabs-query.c')
| -rw-r--r-- | gcc/optabs-query.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/gcc/optabs-query.c b/gcc/optabs-query.c index 215d68e..be24105 100644 --- a/gcc/optabs-query.c +++ b/gcc/optabs-query.c @@ -606,6 +606,33 @@ can_vec_mask_load_store_p (machine_mode mode, return false; } +/* If target supports vector load/store with length for vector mode MODE, + return the corresponding vector mode, otherwise return opt_machine_mode (). + There are two flavors for vector load/store with length, one is to measure + length with bytes, the other is to measure length with lanes. + As len_{load,store} optabs point out, for the flavor with bytes, we use + VnQI to wrap the other supportable same size vector modes. */ + +opt_machine_mode +get_len_load_store_mode (machine_mode mode, bool is_load) +{ + optab op = is_load ? len_load_optab : len_store_optab; + gcc_assert (VECTOR_MODE_P (mode)); + + /* Check if length in lanes supported for this mode directly. */ + if (direct_optab_handler (op, mode)) + return mode; + + /* Check if length in bytes supported for same vector size VnQI. */ + machine_mode vmode; + poly_uint64 nunits = GET_MODE_SIZE (mode); + if (related_vector_mode (mode, QImode, nunits).exists (&vmode) + && direct_optab_handler (op, vmode)) + return vmode; + + return opt_machine_mode (); +} + /* Return true if there is a compare_and_swap pattern. */ bool |