diff options
Diffstat (limited to 'lib/librte_distributor/rte_distributor_match_sse.c')
| -rw-r--r-- | lib/librte_distributor/rte_distributor_match_sse.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/lib/librte_distributor/rte_distributor_match_sse.c b/lib/librte_distributor/rte_distributor_match_sse.c new file mode 100644 index 00000000..44935a69 --- /dev/null +++ b/lib/librte_distributor/rte_distributor_match_sse.c @@ -0,0 +1,114 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2017 Intel Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <rte_mbuf.h> +#include "rte_distributor_private.h" +#include "rte_distributor.h" +#include "smmintrin.h" +#include "nmmintrin.h" + + +void +find_match_vec(struct rte_distributor *d, + uint16_t *data_ptr, + uint16_t *output_ptr) +{ + /* Setup */ + __m128i incoming_fids; + __m128i inflight_fids; + __m128i preflight_fids; + __m128i wkr; + __m128i mask1; + __m128i mask2; + __m128i output; + struct rte_distributor_backlog *bl; + uint16_t i; + + /* + * Function overview: + * 2. Loop through all worker ID's + * 2a. Load the current inflights for that worker into an xmm reg + * 2b. Load the current backlog for that worker into an xmm reg + * 2c. use cmpestrm to intersect flow_ids with backlog and inflights + * 2d. Add any matches to the output + * 3. Write the output xmm (matching worker ids). + */ + + + output = _mm_set1_epi16(0); + incoming_fids = _mm_load_si128((__m128i *)data_ptr); + + for (i = 0; i < d->num_workers; i++) { + bl = &d->backlog[i]; + + inflight_fids = + _mm_load_si128((__m128i *)&(d->in_flight_tags[i])); + preflight_fids = + _mm_load_si128((__m128i *)(bl->tags)); + + /* + * Any incoming_fid that exists anywhere in inflight_fids will + * have 0xffff in same position of the mask as the incoming fid + * Example (shortened to bytes for brevity): + * incoming_fids 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 + * inflight_fids 0x03 0x05 0x07 0x00 0x00 0x00 0x00 0x00 + * mask 0x00 0x00 0xff 0x00 0xff 0x00 0xff 0x00 + */ + + mask1 = _mm_cmpestrm(inflight_fids, 8, incoming_fids, 8, + _SIDD_UWORD_OPS | + _SIDD_CMP_EQUAL_ANY | + _SIDD_UNIT_MASK); + mask2 = _mm_cmpestrm(preflight_fids, 8, incoming_fids, 8, + _SIDD_UWORD_OPS | + _SIDD_CMP_EQUAL_ANY | + _SIDD_UNIT_MASK); + + mask1 = _mm_or_si128(mask1, mask2); + /* + * Now mask contains 0xffff where there's a match. + * Next we need to store the worker_id in the relevant position + * in the output. + */ + + wkr = _mm_set1_epi16(i+1); + mask1 = _mm_and_si128(mask1, wkr); + output = _mm_or_si128(mask1, output); + } + + /* + * At this stage, the output 128-bit contains 8 16-bit values, with + * each non-zero value containing the worker ID on which the + * corresponding flow is pinned to. + */ + _mm_store_si128((__m128i *)output_ptr, output); +} |