3f98dd87d2
* Added file lib/librte_efd/rte_efd_arm64.h to hold arm64 specific definitions * Verified the changes with efd_autotest unit test case Signed-off-by: Ashwin Sekhar T K <ashwin.sekhar@caviumnetworks.com>
77 lines
2.9 KiB
C
77 lines
2.9 KiB
C
/*
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* BSD LICENSE
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*
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* Copyright (C) Cavium networks Ltd. 2017.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Cavium networks nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* rte_efd_arm64.h
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* This file holds all arm64 specific EFD functions
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*/
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#ifndef __RTE_EFD_ARM64_H__
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#define __RTE_EFD_ARM64_H__
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#include <rte_vect.h>
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static inline efd_value_t
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efd_lookup_internal_neon(const efd_hashfunc_t *group_hash_idx,
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const efd_lookuptbl_t *group_lookup_table,
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const uint32_t hash_val_a, const uint32_t hash_val_b)
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{
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efd_value_t value = 0;
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uint32_t i = 0;
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uint32x4_t vhash_val_a = vmovq_n_u32(hash_val_a);
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uint32x4_t vhash_val_b = vmovq_n_u32(hash_val_b);
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int32x4_t vshift = {0, 1, 2, 3};
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uint32x4_t vmask = vdupq_n_u32(0x1);
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int32x4_t vincr = vdupq_n_s32(4);
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for (; i < RTE_EFD_VALUE_NUM_BITS; i += 4) {
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uint32x4_t vhash_idx = vshll_n_u16(
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vld1_u16((uint16_t const *)&group_hash_idx[i]), 0);
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uint32x4_t vlookup_table = vshll_n_u16(
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vld1_u16((uint16_t const *)&group_lookup_table[i]), 0);
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uint32x4_t vhash = vaddq_u32(vhash_val_a,
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vmulq_u32(vhash_idx, vhash_val_b));
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int32x4_t vbucket_idx = vnegq_s32(vreinterpretq_s32_u32(
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vshrq_n_u32(vhash, EFD_LOOKUPTBL_SHIFT)));
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uint32x4_t vresult = vshlq_u32(vlookup_table, vbucket_idx);
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vresult = vandq_u32(vresult, vmask);
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vresult = vshlq_u32(vresult, vshift);
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value |= vaddvq_u32(vresult);
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vshift = vaddq_s32(vshift, vincr);
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}
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return value;
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}
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#endif /* __RTE_EFD_ARM64_H__ */
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