Imported Upstream version 17.05

[deb_dpdk.git] / lib / librte_efd / rte_efd_x86.h

diff --git a/lib/librte_efd/rte_efd_x86.h b/lib/librte_efd/rte_efd_x86.h
new file mode 100644 (file)
index 0000000..34f37d7
--- /dev/null
+++ b/lib/librte_efd/rte_efd_x86.h
@@ -0,0 +1,86 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2016-2017 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   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 Intel Corporation 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_x86.h
+ * This file holds all x86 specific EFD functions
+ */
+#include <immintrin.h>
+
+#if (RTE_EFD_VALUE_NUM_BITS == 8 || RTE_EFD_VALUE_NUM_BITS == 16 || \
+       RTE_EFD_VALUE_NUM_BITS == 24 || RTE_EFD_VALUE_NUM_BITS == 32)
+#define EFD_LOAD_SI128(val) _mm_load_si128(val)
+#else
+#define EFD_LOAD_SI128(val) _mm_lddqu_si128(val)
+#endif
+
+static inline efd_value_t
+efd_lookup_internal_avx2(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)
+{
+#ifdef RTE_MACHINE_CPUFLAG_AVX2
+       efd_value_t value = 0;
+       uint32_t i = 0;
+       __m256i vhash_val_a = _mm256_set1_epi32(hash_val_a);
+       __m256i vhash_val_b = _mm256_set1_epi32(hash_val_b);
+
+       for (; i < RTE_EFD_VALUE_NUM_BITS; i += 8) {
+               __m256i vhash_idx =
+                               _mm256_cvtepu16_epi32(EFD_LOAD_SI128(
+                               (__m128i const *) &group_hash_idx[i]));
+               __m256i vlookup_table = _mm256_cvtepu16_epi32(
+                               EFD_LOAD_SI128((__m128i const *)
+                               &group_lookup_table[i]));
+               __m256i vhash = _mm256_add_epi32(vhash_val_a,
+                               _mm256_mullo_epi32(vhash_idx, vhash_val_b));
+               __m256i vbucket_idx = _mm256_srli_epi32(vhash,
+                               EFD_LOOKUPTBL_SHIFT);
+               __m256i vresult = _mm256_srlv_epi32(vlookup_table,
+                               vbucket_idx);
+
+               value |= (_mm256_movemask_ps(
+                       (__m256) _mm256_slli_epi32(vresult, 31))
+                       & ((1 << (RTE_EFD_VALUE_NUM_BITS - i)) - 1)) << i;
+       }
+
+       return value;
+#else
+       RTE_SET_USED(group_hash_idx);
+       RTE_SET_USED(group_lookup_table);
+       RTE_SET_USED(hash_val_a);
+       RTE_SET_USED(hash_val_b);
+       /* Return dummy value, only to avoid compilation breakage */
+       return 0;
+#endif
+
+}