30a1de105a
These header includes have been flagged by the iwyu_tool and removed. Signed-off-by: Sean Morrissey <sean.morrissey@intel.com>
85 lines
2.2 KiB
C
85 lines
2.2 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2017 Intel Corporation
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*/
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#include <rte_mbuf.h>
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#include "distributor_private.h"
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#include "smmintrin.h"
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void
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find_match_vec(struct rte_distributor *d,
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uint16_t *data_ptr,
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uint16_t *output_ptr)
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{
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/* Setup */
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__m128i incoming_fids;
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__m128i inflight_fids;
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__m128i preflight_fids;
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__m128i wkr;
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__m128i mask1;
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__m128i mask2;
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__m128i output;
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struct rte_distributor_backlog *bl;
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uint16_t i;
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/*
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* Function overview:
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* 2. Loop through all worker ID's
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* 2a. Load the current inflights for that worker into an xmm reg
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* 2b. Load the current backlog for that worker into an xmm reg
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* 2c. use cmpestrm to intersect flow_ids with backlog and inflights
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* 2d. Add any matches to the output
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* 3. Write the output xmm (matching worker ids).
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*/
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output = _mm_set1_epi16(0);
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incoming_fids = _mm_load_si128((__m128i *)data_ptr);
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for (i = 0; i < d->num_workers; i++) {
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bl = &d->backlog[i];
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inflight_fids =
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_mm_load_si128((__m128i *)&(d->in_flight_tags[i]));
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preflight_fids =
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_mm_load_si128((__m128i *)(bl->tags));
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/*
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* Any incoming_fid that exists anywhere in inflight_fids will
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* have 0xffff in same position of the mask as the incoming fid
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* Example (shortened to bytes for brevity):
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* incoming_fids 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08
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* inflight_fids 0x03 0x05 0x07 0x00 0x00 0x00 0x00 0x00
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* mask 0x00 0x00 0xff 0x00 0xff 0x00 0xff 0x00
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*/
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mask1 = _mm_cmpestrm(inflight_fids, 8, incoming_fids, 8,
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_SIDD_UWORD_OPS |
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_SIDD_CMP_EQUAL_ANY |
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_SIDD_UNIT_MASK);
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mask2 = _mm_cmpestrm(preflight_fids, 8, incoming_fids, 8,
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_SIDD_UWORD_OPS |
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_SIDD_CMP_EQUAL_ANY |
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_SIDD_UNIT_MASK);
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mask1 = _mm_or_si128(mask1, mask2);
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/*
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* Now mask contains 0xffff where there's a match.
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* Next we need to store the worker_id in the relevant position
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* in the output.
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*/
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wkr = _mm_set1_epi16(i+1);
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mask1 = _mm_and_si128(mask1, wkr);
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output = _mm_or_si128(mask1, output);
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}
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/*
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* At this stage, the output 128-bit contains 8 16-bit values, with
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* each non-zero value containing the worker ID on which the
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* corresponding flow is pinned to.
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*/
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_mm_store_si128((__m128i *)output_ptr, output);
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}
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