diff options
| -rw-r--r-- | gcc/config/riscv/riscv-v.cc | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/config/riscv/riscv-v.cc b/gcc/config/riscv/riscv-v.cc index 34fdb53..d797326 100644 --- a/gcc/config/riscv/riscv-v.cc +++ b/gcc/config/riscv/riscv-v.cc @@ -457,6 +457,9 @@ rvv_builder::single_step_npatterns_p () const { 2, 2, 2, 2, 4, 4, 4, 4, 8, 8, 8, 8, 16, 16, 16, 16, ... } E.g. NPATTERNS = 8: { 2, 2, 2, 2, 2, 2, 2, 2, 8, 8, 8, 8, 8, 8, 8, 8, ... } + We only check ele[0] ~ ele[NPATTERNS - 1] whether they are the same. + We don't need to check the elements[n] with n >= NPATTERNS since + they don't belong to the same pattern. */ bool rvv_builder::npatterns_all_equal_p () const @@ -2478,6 +2481,8 @@ shuffle_generic_patterns (struct expand_vec_perm_d *d) return true; } +/* This function recognizes and supports different permutation patterns + and enable VLA SLP auto-vectorization. */ static bool expand_vec_perm_const_1 (struct expand_vec_perm_d *d) { @@ -2509,6 +2514,8 @@ expand_vec_perm_const_1 (struct expand_vec_perm_d *d) return false; } +/* This function implements TARGET_VECTORIZE_VEC_PERM_CONST by using RVV + * instructions. */ bool expand_vec_perm_const (machine_mode vmode, machine_mode op_mode, rtx target, rtx op0, rtx op1, const vec_perm_indices &sel) |