New upstream version 17.08

[deb_dpdk.git] / lib / librte_efd / rte_efd_arm64.h

diff --git a/lib/librte_efd/rte_efd_arm64.h b/lib/librte_efd/rte_efd_arm64.h
new file mode 100644 (file)
index 0000000..63289ac
--- /dev/null
+++ b/lib/librte_efd/rte_efd_arm64.h
@@ -0,0 +1,76 @@
+/*
+ *   BSD LICENSE
+ *
+ *   Copyright (C) Cavium, Inc. 2017.
+ *
+ *   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 Cavium, Inc 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_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__ */