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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2017 Cavium, Inc
*/
/*
* 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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