2018-01-08 05:25:14 +00:00
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/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2017 Cavium, Inc
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2017-04-27 12:44:18 +00:00
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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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