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/*
* BSD LICENSE
*
* Copyright (C) Cavium, Inc. 2017.
*
* 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 Cavium, Inc 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.
*/
/*
* rte_efd_arm64.h
* This file holds all arm64 specific EFD functions
*/
#ifndef __RTE_EFD_ARM64_H__
#define __RTE_EFD_ARM64_H__
#include <rte_vect.h>
static inline efd_value_t
efd_lookup_internal_neon(const efd_hashfunc_t *group_hash_idx,
const efd_lookuptbl_t *group_lookup_table,
const uint32_t hash_val_a, const uint32_t hash_val_b)
{
efd_value_t value = 0;
uint32_t i = 0;
uint32x4_t vhash_val_a = vmovq_n_u32(hash_val_a);
uint32x4_t vhash_val_b = vmovq_n_u32(hash_val_b);
int32x4_t vshift = {0, 1, 2, 3};
uint32x4_t vmask = vdupq_n_u32(0x1);
int32x4_t vincr = vdupq_n_s32(4);
for (; i < RTE_EFD_VALUE_NUM_BITS; i += 4) {
uint32x4_t vhash_idx = vshll_n_u16(
vld1_u16((uint16_t const *)&group_hash_idx[i]), 0);
uint32x4_t vlookup_table = vshll_n_u16(
vld1_u16((uint16_t const *)&group_lookup_table[i]), 0);
uint32x4_t vhash = vaddq_u32(vhash_val_a,
vmulq_u32(vhash_idx, vhash_val_b));
int32x4_t vbucket_idx = vnegq_s32(vreinterpretq_s32_u32(
vshrq_n_u32(vhash, EFD_LOOKUPTBL_SHIFT)));
uint32x4_t vresult = vshlq_u32(vlookup_table, vbucket_idx);
vresult = vandq_u32(vresult, vmask);
vresult = vshlq_u32(vresult, vshift);
value |= vaddvq_u32(vresult);
vshift = vaddq_s32(vshift, vincr);
}
return value;
}
#endif /* __RTE_EFD_ARM64_H__ */
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