acl_vect.h

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/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright (c) 2010-2022 Intel Corporation
 */
 
#ifndef _CNE_ACL_VECT_H_
#define _CNE_ACL_VECT_H_
 
#ifdef __cplusplus
extern "C" {
#endif
 
/*
 * Takes 2 SIMD registers containing N transitions each (tr0, tr1).
 * Shuffles it into different representation:
 * lo - contains low 32 bits of given N transitions.
 * hi - contains high 32 bits of given N transitions.
 */
#define ACL_TR_HILO(P, TC, tr0, tr1, lo, hi)                            \
    do {                                                                \
        lo = (typeof(lo))_##P##_shuffle_ps((TC)(tr0), (TC)(tr1), 0x88); \
        hi = (typeof(hi))_##P##_shuffle_ps((TC)(tr0), (TC)(tr1), 0xdd); \
    } while (0)
 
/*
 * Calculate the address of the next transition for
 * all types of nodes. Note that only DFA nodes and range
 * nodes actually transition to another node. Match
 * nodes not supposed to be encountered here.
 * For quad range nodes:
 * Calculate number of range boundaries that are less than the
 * input value. Range boundaries for each node are in signed 8 bit,
 * ordered from -128 to 127.
 * This is effectively a popcnt of bytes that are greater than the
 * input byte.
 * Single nodes are processed in the same ways as quad range nodes.
 */
#define ACL_TR_CALC_ADDR(P, S, addr, index_mask, next_input, shuffle_input, ones_16, range_base, \
                         tr_lo, tr_hi)                                                           \
    do {                                                                                         \
                                                                                                 \
        typeof(addr) in, node_type, r, t;                                                        \
        typeof(addr) dfa_msk, dfa_ofs, quad_ofs;                                                 \
                                                                                                 \
        t  = _##P##_xor_si##S(index_mask, index_mask);                                           \
        in = _##P##_shuffle_epi8(next_input, shuffle_input);                                     \
                                                                                                 \
        /* Calc node type and node addr */                                                       \
        node_type = _##P##_andnot_si##S(index_mask, tr_lo);                                      \
        addr      = _##P##_and_si##S(index_mask, tr_lo);                                         \
                                                                                                 \
        /* mask for DFA type(0) nodes */                                                         \
        dfa_msk = _##P##_cmpeq_epi32(node_type, t);                                              \
                                                                                                 \
        /* DFA calculations. */                                                                  \
        r = _##P##_srli_epi32(in, 30);                                                           \
        r = _##P##_add_epi8(r, range_base);                                                      \
        t = _##P##_srli_epi32(in, 24);                                                           \
        r = _##P##_shuffle_epi8(tr_hi, r);                                                       \
                                                                                                 \
        dfa_ofs = _##P##_sub_epi32(t, r);                                                        \
                                                                                                 \
        /* QUAD/SINGLE calculations. */                                                          \
        t        = _##P##_cmpgt_epi8(in, tr_hi);                                                 \
        t        = _##P##_sign_epi8(t, t);                                                       \
        t        = _##P##_maddubs_epi16(t, t);                                                   \
        quad_ofs = _##P##_madd_epi16(t, ones_16);                                                \
                                                                                                 \
        /* blend DFA and QUAD/SINGLE. */                                                         \
        t = _##P##_blendv_epi8(quad_ofs, dfa_ofs, dfa_msk);                                      \
                                                                                                 \
        /* calculate address for next transitions. */                                            \
        addr = _##P##_add_epi32(addr, t);                                                        \
    } while (0)
 
#ifdef __cplusplus
}
#endif
 
#endif /* _CNE_ACL_VECT_H_ */