Add xxhash

third_party/xxhash/tests/bench/hashes.h

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+/*
+*  List hash algorithms to benchmark
+*  Part of xxHash project
+*  Copyright (C) 2019-2021 Yann Collet
+*
+*  GPL v2 License
+*
+*  This program is free software; you can redistribute it and/or modify
+*  it under the terms of the GNU General Public License as published by
+*  the Free Software Foundation; either version 2 of the License, or
+*  (at your option) any later version.
+*
+*  This program is distributed in the hope that it will be useful,
+*  but WITHOUT ANY WARRANTY; without even the implied warranty of
+*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*  GNU General Public License for more details.
+*
+*  You should have received a copy of the GNU General Public License along
+*  with this program; if not, write to the Free Software Foundation, Inc.,
+*  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*
+*  You can contact the author at:
+*  - xxHash homepage: https://www.xxhash.com
+*  - xxHash source repository: https://github.com/Cyan4973/xxHash
+*/
+
+
+/* ===   Dependencies   === */
+
+#include <stddef.h>   /* size_t */
+
+
+/* ==================================================
+ *   Non-portable hash algorithms
+ * =============================================== */
+
+
+#ifdef HARDWARE_SUPPORT
+
+/*
+ * List any hash algorithms that depend on specific hardware support,
+ * including for example:
+ * - Hardware crc32c
+ * - Hardware AES support
+ * - Carryless Multipliers (clmul)
+ * - AVX2
+ */
+
+#endif
+
+
+
+/* ==================================================
+ * List of hashes
+ * ==================================================
+ * Each hash must be wrapped in a thin redirector conformant with the BMK_benchfn_t.
+ * BMK_benchfn_t is generic, not specifically designed for hashes.
+ * For hashes, the following parameters are expected to be useless:
+ * dst, dstCapacity, customPayload.
+ *
+ * The result of each hash is assumed to be provided as function return value.
+ * This condition is important for latency measurements.
+ */
+
+ /* ===  xxHash  === */
+#define XXH_INLINE_ALL
+#include "xxhash.h"
+
+size_t XXH32_wrapper(const void* src, size_t srcSize, void* dst, size_t dstCapacity, void* customPayload)
+{
+    (void)dst; (void)dstCapacity; (void)customPayload;
+    return (size_t) XXH32(src, srcSize, 0);
+}
+
+
+size_t XXH64_wrapper(const void* src, size_t srcSize, void* dst, size_t dstCapacity, void* customPayload)
+{
+    (void)dst; (void)dstCapacity; (void)customPayload;
+    return (size_t) XXH64(src, srcSize, 0);
+}
+
+
+size_t xxh3_wrapper(const void* src, size_t srcSize, void* dst, size_t dstCapacity, void* customPayload)
+{
+    (void)dst; (void)dstCapacity; (void)customPayload;
+    return (size_t) XXH3_64bits(src, srcSize);
+}
+
+
+size_t XXH128_wrapper(const void* src, size_t srcSize, void* dst, size_t dstCapacity, void* customPayload)
+{
+    (void)dst; (void)dstCapacity; (void)customPayload;
+    return (size_t) XXH3_128bits(src, srcSize).low64;
+}
+
+
+
+/* ==================================================
+ * Table of hashes
+ * =============================================== */
+
+#include "bhDisplay.h"   /* Bench_Entry */
+
+#ifndef HARDWARE_SUPPORT
+#  define NB_HASHES 4
+#else
+#  define NB_HASHES 4
+#endif
+
+Bench_Entry const hashCandidates[NB_HASHES] = {
+    { "xxh3"  , xxh3_wrapper },
+    { "XXH32" , XXH32_wrapper },
+    { "XXH64" , XXH64_wrapper },
+    { "XXH128", XXH128_wrapper },
+#ifdef HARDWARE_SUPPORT
+    /* list here codecs which require specific hardware support, such SSE4.1, PCLMUL, AVX2, etc. */
+#endif
+};