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| author | Juzhe-Zhong <juzhe.zhong@rivai.ai> | 2023-06-13 10:26:11 +0800 |
|---|---|---|
| committer | Pan Li <pan2.li@intel.com> | 2023-06-13 22:14:06 +0800 |
| commit | a07dadba85f1b15e270c227dfa70e2fdf331494f (patch) | |
| tree | b9c399f2a8df78b9bfaa509d95d9b6f0e279e1dd /gcc | |
| parent | 325bfe220517d073ddd0f413cf95465d89f273ac (diff) | |
| download | gcc-a07dadba85f1b15e270c227dfa70e2fdf331494f.zip gcc-a07dadba85f1b15e270c227dfa70e2fdf331494f.tar.gz gcc-a07dadba85f1b15e270c227dfa70e2fdf331494f.tar.bz2 | |
RISC-V: Add comments of some functions
gcc/ChangeLog:
* config/riscv/riscv-v.cc (rvv_builder::single_step_npatterns_p): Add comment.
(shuffle_generic_patterns): Ditto.
(expand_vec_perm_const_1): Ditto.
Diffstat (limited to 'gcc')
| -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) |