diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/vnet/classify/vnet_classify.h | 160 |
1 files changed, 72 insertions, 88 deletions
diff --git a/src/vnet/classify/vnet_classify.h b/src/vnet/classify/vnet_classify.h index 11b05308b19..f635ecc49dc 100644 --- a/src/vnet/classify/vnet_classify.h +++ b/src/vnet/classify/vnet_classify.h @@ -396,24 +396,86 @@ vnet_classify_prefetch_entry (vnet_classify_table_t * t, u64 hash) vnet_classify_entry_t *vnet_classify_find_entry (vnet_classify_table_t * t, u8 * h, u64 hash, f64 now); +static_always_inline int +vnet_classify_entry_is_equal (vnet_classify_entry_t *v, const u8 *d, u8 *m, + u32 match_n_vectors) +{ +#ifdef CLIB_HAVE_VEC128 + u64x2u *data = (u64x2 *) d; + u64x2 *key = (u64x2 *) v->key; + u64x2 *mask = (u64x2 *) m; + u64x2 r; + + r = (data[0] & mask[0]) ^ key[0]; + switch (match_n_vectors) + { + case 5: + r |= (data[4] & mask[4]) ^ key[4]; + /* fall through */ + case 4: + r |= (data[3] & mask[3]) ^ key[3]; + /* fall through */ + case 3: + r |= (data[2] & mask[2]) ^ key[2]; + /* fall through */ + case 2: + r |= (data[1] & mask[1]) ^ key[1]; + /* fall through */ + case 1: + break; + default: + abort (); + } + + if (u64x2_is_all_zero (r)) + return 1; + +#else + u64 *data = (u64 *) d; + u64 *key = (u64 *) v->key; + u64 *mask = (u64 *) m; + u64 r; + + r = ((data[0] & mask[0]) ^ key[0]) | ((data[1] & mask[1]) ^ key[1]); + switch (match_n_vectors) + { + case 5: + r |= ((data[8] & mask[8]) ^ key[8]) | ((data[9] & mask[9]) ^ key[9]); + /* fall through */ + case 4: + r |= ((data[6] & mask[6]) ^ key[6]) | ((data[7] & mask[7]) ^ key[7]); + /* fall through */ + case 3: + r |= ((data[4] & mask[4]) ^ key[4]) | ((data[5] & mask[5]) ^ key[5]); + /* fall through */ + case 2: + r |= ((data[2] & mask[2]) ^ key[2]) | ((data[3] & mask[3]) ^ key[3]); + /* fall through */ + case 1: + break; + default: + abort (); + } + + if (r == 0) + return 1; + +#endif /* CLIB_HAVE_VEC128 */ + return 0; +} + static inline vnet_classify_entry_t * vnet_classify_find_entry_inline (vnet_classify_table_t *t, const u8 *h, u64 hash, f64 now) { vnet_classify_entry_t *v; - u32x4 *mask, *key; - union - { - u32x4 as_u32x4; - u64 as_u64[2]; - } result __attribute__ ((aligned (sizeof (u32x4)))); vnet_classify_bucket_t *b; - u32 bucket_index, limit, pages; + u32 bucket_index, limit, pages, match_n_vectors = t->match_n_vectors; + u8 *mask = (u8 *) t->mask; int i; bucket_index = hash & (t->nbuckets - 1); b = &t->buckets[bucket_index]; - mask = t->mask; if (b->offset == 0) return 0; @@ -432,87 +494,11 @@ vnet_classify_find_entry_inline (vnet_classify_table_t *t, const u8 *h, v = vnet_classify_entry_at_index (t, v, hash & (pages - 1)); } -#ifdef CLIB_HAVE_VEC128 - const u32x4u *data = (const u32x4u *) h; - for (i = 0; i < limit; i++) - { - key = v->key; - result.as_u32x4 = (data[0 + t->skip_n_vectors] & mask[0]) ^ key[0]; - switch (t->match_n_vectors) - { - case 5: - result.as_u32x4 |= (data[4 + t->skip_n_vectors] & mask[4]) ^ key[4]; - /* FALLTHROUGH */ - case 4: - result.as_u32x4 |= (data[3 + t->skip_n_vectors] & mask[3]) ^ key[3]; - /* FALLTHROUGH */ - case 3: - result.as_u32x4 |= (data[2 + t->skip_n_vectors] & mask[2]) ^ key[2]; - /* FALLTHROUGH */ - case 2: - result.as_u32x4 |= (data[1 + t->skip_n_vectors] & mask[1]) ^ key[1]; - /* FALLTHROUGH */ - case 1: - break; - default: - abort (); - } + h += t->skip_n_vectors * 16; - if (u32x4_is_all_zero (result.as_u32x4)) - { - if (PREDICT_TRUE (now)) - { - v->hits++; - v->last_heard = now; - } - return (v); - } - v = vnet_classify_entry_at_index (t, v, 1); - } -#else - u32 skip_u64 = t->skip_n_vectors * 2; - const u64 *data64 = (const u64 *) h; for (i = 0; i < limit; i++) { - key = v->key; - - result.as_u64[0] = - (data64[0 + skip_u64] & ((u64 *) mask)[0]) ^ ((u64 *) key)[0]; - result.as_u64[1] = - (data64[1 + skip_u64] & ((u64 *) mask)[1]) ^ ((u64 *) key)[1]; - switch (t->match_n_vectors) - { - case 5: - result.as_u64[0] |= - (data64[8 + skip_u64] & ((u64 *) mask)[8]) ^ ((u64 *) key)[8]; - result.as_u64[1] |= - (data64[9 + skip_u64] & ((u64 *) mask)[9]) ^ ((u64 *) key)[9]; - /* FALLTHROUGH */ - case 4: - result.as_u64[0] |= - (data64[6 + skip_u64] & ((u64 *) mask)[6]) ^ ((u64 *) key)[6]; - result.as_u64[1] |= - (data64[7 + skip_u64] & ((u64 *) mask)[7]) ^ ((u64 *) key)[7]; - /* FALLTHROUGH */ - case 3: - result.as_u64[0] |= - (data64[4 + skip_u64] & ((u64 *) mask)[4]) ^ ((u64 *) key)[4]; - result.as_u64[1] |= - (data64[5 + skip_u64] & ((u64 *) mask)[5]) ^ ((u64 *) key)[5]; - /* FALLTHROUGH */ - case 2: - result.as_u64[0] |= - (data64[2 + skip_u64] & ((u64 *) mask)[2]) ^ ((u64 *) key)[2]; - result.as_u64[1] |= - (data64[3 + skip_u64] & ((u64 *) mask)[3]) ^ ((u64 *) key)[3]; - /* FALLTHROUGH */ - case 1: - break; - default: - abort (); - } - - if (result.as_u64[0] == 0 && result.as_u64[1] == 0) + if (vnet_classify_entry_is_equal (v, h, mask, match_n_vectors)) { if (PREDICT_TRUE (now)) { @@ -521,10 +507,8 @@ vnet_classify_find_entry_inline (vnet_classify_table_t *t, const u8 *h, } return (v); } - v = vnet_classify_entry_at_index (t, v, 1); } -#endif /* CLIB_HAVE_VEC128 */ return 0; } |