lib/librte_acl/acl_vect.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #ifndef _RTE_ACL_VECT_H_
   6 #define _RTE_ACL_VECT_H_
   7
   8 /**
   9  * @file
  10  *
  11  * RTE ACL SSE/AVX related header.
  12  */
  13
  14 #ifdef __cplusplus
  15 extern "C" {
  16 #endif
  17
  18
  19 /*
  20  * Takes 2 SIMD registers containing N transitions eachi (tr0, tr1).
  21  * Shuffles it into different representation:
  22  * lo - contains low 32 bits of given N transitions.
  23  * hi - contains high 32 bits of given N transitions.
  24  */
  25 #define ACL_TR_HILO(P, TC, tr0, tr1, lo, hi)                        do { \
  26         lo = (typeof(lo))_##P##_shuffle_ps((TC)(tr0), (TC)(tr1), 0x88);  \
  27         hi = (typeof(hi))_##P##_shuffle_ps((TC)(tr0), (TC)(tr1), 0xdd);  \
  28 } while (0)
  29
  30
  31 /*
  32  * Calculate the address of the next transition for
  33  * all types of nodes. Note that only DFA nodes and range
  34  * nodes actually transition to another node. Match
  35  * nodes not supposed to be encountered here.
  36  * For quad range nodes:
  37  * Calculate number of range boundaries that are less than the
  38  * input value. Range boundaries for each node are in signed 8 bit,
  39  * ordered from -128 to 127.
  40  * This is effectively a popcnt of bytes that are greater than the
  41  * input byte.
  42  * Single nodes are processed in the same ways as quad range nodes.
  43 */
  44 #define ACL_TR_CALC_ADDR(P, S,                                  \
  45         addr, index_mask, next_input, shuffle_input,            \
  46         ones_16, range_base, tr_lo, tr_hi)               do {   \
  47                                                                 \
  48         typeof(addr) in, node_type, r, t;                       \
  49         typeof(addr) dfa_msk, dfa_ofs, quad_ofs;                \
  50                                                                 \
  51         t = _##P##_xor_si##S(index_mask, index_mask);           \
  52         in = _##P##_shuffle_epi8(next_input, shuffle_input);    \
  53                                                                 \
  54         /* Calc node type and node addr */                      \
  55         node_type = _##P##_andnot_si##S(index_mask, tr_lo);     \
  56         addr = _##P##_and_si##S(index_mask, tr_lo);             \
  57                                                                 \
  58         /* mask for DFA type(0) nodes */                        \
  59         dfa_msk = _##P##_cmpeq_epi32(node_type, t);             \
  60                                                                 \
  61         /* DFA calculations. */                                 \
  62         r = _##P##_srli_epi32(in, 30);                          \
  63         r = _##P##_add_epi8(r, range_base);                     \
  64         t = _##P##_srli_epi32(in, 24);                          \
  65         r = _##P##_shuffle_epi8(tr_hi, r);                      \
  66                                                                 \
  67         dfa_ofs = _##P##_sub_epi32(t, r);                       \
  68                                                                 \
  69         /* QUAD/SINGLE caluclations. */                         \
  70         t = _##P##_cmpgt_epi8(in, tr_hi);                       \
  71         t = _##P##_sign_epi8(t, t);                             \
  72         t = _##P##_maddubs_epi16(t, t);                         \
  73         quad_ofs = _##P##_madd_epi16(t, ones_16);               \
  74                                                                 \
  75         /* blend DFA and QUAD/SINGLE. */                        \
  76         t = _##P##_blendv_epi8(quad_ofs, dfa_ofs, dfa_msk);     \
  77                                                                 \
  78         /* calculate address for next transitions. */           \
  79         addr = _##P##_add_epi32(addr, t);                       \
  80 } while (0)
  81
  82
  83 #ifdef __cplusplus
  84 }
  85 #endif
  86
  87 #endif /* _RTE_ACL_VECT_H_ */