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R-rlang/0001-Unbundle-libxxhash.patch
Elliott Sales de Andrade 3bd0232bb9 Add a patch to fix big-endian test results.
2020-12-31 03:06:51 -05:00

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From 1890689ab03ed9cfdc193501c0fc48cb0bab339b Mon Sep 17 00:00:00 2001
From: Elliott Sales de Andrade <quantum.analyst@gmail.com>
Date: Wed, 30 Dec 2020 20:07:56 -0500
Subject: [PATCH 1/2] Unbundle libxxhash.
Signed-off-by: Elliott Sales de Andrade <quantum.analyst@gmail.com>
---
src/Makevars | 2 +-
src/internal/hash.c | 2 +-
src/internal/xxhash/xxhash.h | 4766 ----------------------------------
3 files changed, 2 insertions(+), 4768 deletions(-)
delete mode 100644 src/internal/xxhash/xxhash.h
diff --git a/src/Makevars b/src/Makevars
index 4484e88f..4a4d549e 100644
--- a/src/Makevars
+++ b/src/Makevars
@@ -1,4 +1,4 @@
-PKG_CPPFLAGS = -I./lib/
+PKG_CPPFLAGS = -I./lib/ $(pkgconf --cflags libxxhash)
PKG_CFLAGS = $(C_VISIBILITY)
lib-files = \
diff --git a/src/internal/hash.c b/src/internal/hash.c
index de6c12af..028c3e30 100644
--- a/src/internal/hash.c
+++ b/src/internal/hash.c
@@ -7,7 +7,7 @@
#define XXH_STATIC_LINKING_ONLY
#define XXH_IMPLEMENTATION
-#include "xxhash/xxhash.h"
+#include "xxhash.h"
#include <stdio.h> // sprintf()
#include <inttypes.h> // PRIx64
diff --git a/src/internal/xxhash/xxhash.h b/src/internal/xxhash/xxhash.h
deleted file mode 100644
index 2d56d23c..00000000
--- a/src/internal/xxhash/xxhash.h
+++ /dev/null
@@ -1,4766 +0,0 @@
-/*
- * xxHash - Extremely Fast Hash algorithm
- * Header File
- * Copyright (C) 2012-2020 Yann Collet
- *
- * BSD 2-Clause License (https://www.opensource.org/licenses/bsd-license.php)
- *
- * 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.
- *
- * 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.
- *
- * You can contact the author at:
- * - xxHash homepage: https://www.xxhash.com
- * - xxHash source repository: https://github.com/Cyan4973/xxHash
- */
-
-/* TODO: update */
-/* Notice extracted from xxHash homepage:
-
-xxHash is an extremely fast hash algorithm, running at RAM speed limits.
-It also successfully passes all tests from the SMHasher suite.
-
-Comparison (single thread, Windows Seven 32 bits, using SMHasher on a Core 2 Duo @3GHz)
-
-Name Speed Q.Score Author
-xxHash 5.4 GB/s 10
-CrapWow 3.2 GB/s 2 Andrew
-MumurHash 3a 2.7 GB/s 10 Austin Appleby
-SpookyHash 2.0 GB/s 10 Bob Jenkins
-SBox 1.4 GB/s 9 Bret Mulvey
-Lookup3 1.2 GB/s 9 Bob Jenkins
-SuperFastHash 1.2 GB/s 1 Paul Hsieh
-CityHash64 1.05 GB/s 10 Pike & Alakuijala
-FNV 0.55 GB/s 5 Fowler, Noll, Vo
-CRC32 0.43 GB/s 9
-MD5-32 0.33 GB/s 10 Ronald L. Rivest
-SHA1-32 0.28 GB/s 10
-
-Q.Score is a measure of quality of the hash function.
-It depends on successfully passing SMHasher test set.
-10 is a perfect score.
-
-Note: SMHasher's CRC32 implementation is not the fastest one.
-Other speed-oriented implementations can be faster,
-especially in combination with PCLMUL instruction:
-https://fastcompression.blogspot.com/2019/03/presenting-xxh3.html?showComment=1552696407071#c3490092340461170735
-
-A 64-bit version, named XXH64, is available since r35.
-It offers much better speed, but for 64-bit applications only.
-Name Speed on 64 bits Speed on 32 bits
-XXH64 13.8 GB/s 1.9 GB/s
-XXH32 6.8 GB/s 6.0 GB/s
-*/
-
-#if defined (__cplusplus)
-extern "C" {
-#endif
-
-/* ****************************
- * INLINE mode
- ******************************/
-/*!
- * XXH_INLINE_ALL (and XXH_PRIVATE_API)
- * Use these build macros to inline xxhash into the target unit.
- * Inlining improves performance on small inputs, especially when the length is
- * expressed as a compile-time constant:
- *
- * https://fastcompression.blogspot.com/2018/03/xxhash-for-small-keys-impressive-power.html
- *
- * It also keeps xxHash symbols private to the unit, so they are not exported.
- *
- * Usage:
- * #define XXH_INLINE_ALL
- * #include "xxhash.h"
- *
- * Do not compile and link xxhash.o as a separate object, as it is not useful.
- */
-#if (defined(XXH_INLINE_ALL) || defined(XXH_PRIVATE_API)) \
- && !defined(XXH_INLINE_ALL_31684351384)
- /* this section should be traversed only once */
-# define XXH_INLINE_ALL_31684351384
- /* give access to the advanced API, required to compile implementations */
-# undef XXH_STATIC_LINKING_ONLY /* avoid macro redef */
-# define XXH_STATIC_LINKING_ONLY
- /* make all functions private */
-# undef XXH_PUBLIC_API
-# if defined(__GNUC__)
-# define XXH_PUBLIC_API static __inline __attribute__((unused))
-# elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
-# define XXH_PUBLIC_API static inline
-# elif defined(_MSC_VER)
-# define XXH_PUBLIC_API static __inline
-# else
- /* note: this version may generate warnings for unused static functions */
-# define XXH_PUBLIC_API static
-# endif
-
- /*
- * This part deals with the special case where a unit wants to inline xxHash,
- * but "xxhash.h" has previously been included without XXH_INLINE_ALL, such
- * as part of some previously included *.h header file.
- * Without further action, the new include would just be ignored,
- * and functions would effectively _not_ be inlined (silent failure).
- * The following macros solve this situation by prefixing all inlined names,
- * avoiding naming collision with previous inclusions.
- */
-# ifdef XXH_NAMESPACE
-# error "XXH_INLINE_ALL with XXH_NAMESPACE is not supported"
- /*
- * Note: Alternative: #undef all symbols (it's a pretty large list).
- * Without #error: it compiles, but functions are actually not inlined.
- */
-# endif
-# define XXH_NAMESPACE XXH_INLINE_
- /*
- * Some identifiers (enums, type names) are not symbols, but they must
- * still be renamed to avoid redeclaration.
- * Alternative solution: do not redeclare them.
- * However, this requires some #ifdefs, and is a more dispersed action.
- * Meanwhile, renaming can be achieved in a single block
- */
-# define XXH_IPREF(Id) XXH_INLINE_ ## Id
-# define XXH_OK XXH_IPREF(XXH_OK)
-# define XXH_ERROR XXH_IPREF(XXH_ERROR)
-# define XXH_errorcode XXH_IPREF(XXH_errorcode)
-# define XXH32_canonical_t XXH_IPREF(XXH32_canonical_t)
-# define XXH64_canonical_t XXH_IPREF(XXH64_canonical_t)
-# define XXH128_canonical_t XXH_IPREF(XXH128_canonical_t)
-# define XXH32_state_s XXH_IPREF(XXH32_state_s)
-# define XXH32_state_t XXH_IPREF(XXH32_state_t)
-# define XXH64_state_s XXH_IPREF(XXH64_state_s)
-# define XXH64_state_t XXH_IPREF(XXH64_state_t)
-# define XXH3_state_s XXH_IPREF(XXH3_state_s)
-# define XXH3_state_t XXH_IPREF(XXH3_state_t)
-# define XXH128_hash_t XXH_IPREF(XXH128_hash_t)
- /* Ensure the header is parsed again, even if it was previously included */
-# undef XXHASH_H_5627135585666179
-# undef XXHASH_H_STATIC_13879238742
-#endif /* XXH_INLINE_ALL || XXH_PRIVATE_API */
-
-
-
-/* ****************************************************************
- * Stable API
- *****************************************************************/
-#ifndef XXHASH_H_5627135585666179
-#define XXHASH_H_5627135585666179 1
-
-/* specific declaration modes for Windows */
-#if !defined(XXH_INLINE_ALL) && !defined(XXH_PRIVATE_API)
-# if defined(WIN32) && defined(_MSC_VER) && (defined(XXH_IMPORT) || defined(XXH_EXPORT))
-# ifdef XXH_EXPORT
-# define XXH_PUBLIC_API __declspec(dllexport)
-# elif XXH_IMPORT
-# define XXH_PUBLIC_API __declspec(dllimport)
-# endif
-# else
-# define XXH_PUBLIC_API /* do nothing */
-# endif
-#endif
-
-/*!
- * XXH_NAMESPACE, aka Namespace Emulation:
- *
- * If you want to include _and expose_ xxHash functions from within your own
- * library, but also want to avoid symbol collisions with other libraries which
- * may also include xxHash, you can use XXH_NAMESPACE to automatically prefix
- * any public symbol from xxhash library with the value of XXH_NAMESPACE
- * (therefore, avoid empty or numeric values).
- *
- * Note that no change is required within the calling program as long as it
- * includes `xxhash.h`: Regular symbol names will be automatically translated
- * by this header.
- */
-#ifdef XXH_NAMESPACE
-# define XXH_CAT(A,B) A##B
-# define XXH_NAME2(A,B) XXH_CAT(A,B)
-# define XXH_versionNumber XXH_NAME2(XXH_NAMESPACE, XXH_versionNumber)
-/* XXH32 */
-# define XXH32 XXH_NAME2(XXH_NAMESPACE, XXH32)
-# define XXH32_createState XXH_NAME2(XXH_NAMESPACE, XXH32_createState)
-# define XXH32_freeState XXH_NAME2(XXH_NAMESPACE, XXH32_freeState)
-# define XXH32_reset XXH_NAME2(XXH_NAMESPACE, XXH32_reset)
-# define XXH32_update XXH_NAME2(XXH_NAMESPACE, XXH32_update)
-# define XXH32_digest XXH_NAME2(XXH_NAMESPACE, XXH32_digest)
-# define XXH32_copyState XXH_NAME2(XXH_NAMESPACE, XXH32_copyState)
-# define XXH32_canonicalFromHash XXH_NAME2(XXH_NAMESPACE, XXH32_canonicalFromHash)
-# define XXH32_hashFromCanonical XXH_NAME2(XXH_NAMESPACE, XXH32_hashFromCanonical)
-/* XXH64 */
-# define XXH64 XXH_NAME2(XXH_NAMESPACE, XXH64)
-# define XXH64_createState XXH_NAME2(XXH_NAMESPACE, XXH64_createState)
-# define XXH64_freeState XXH_NAME2(XXH_NAMESPACE, XXH64_freeState)
-# define XXH64_reset XXH_NAME2(XXH_NAMESPACE, XXH64_reset)
-# define XXH64_update XXH_NAME2(XXH_NAMESPACE, XXH64_update)
-# define XXH64_digest XXH_NAME2(XXH_NAMESPACE, XXH64_digest)
-# define XXH64_copyState XXH_NAME2(XXH_NAMESPACE, XXH64_copyState)
-# define XXH64_canonicalFromHash XXH_NAME2(XXH_NAMESPACE, XXH64_canonicalFromHash)
-# define XXH64_hashFromCanonical XXH_NAME2(XXH_NAMESPACE, XXH64_hashFromCanonical)
-/* XXH3_64bits */
-# define XXH3_64bits XXH_NAME2(XXH_NAMESPACE, XXH3_64bits)
-# define XXH3_64bits_withSecret XXH_NAME2(XXH_NAMESPACE, XXH3_64bits_withSecret)
-# define XXH3_64bits_withSeed XXH_NAME2(XXH_NAMESPACE, XXH3_64bits_withSeed)
-# define XXH3_createState XXH_NAME2(XXH_NAMESPACE, XXH3_createState)
-# define XXH3_freeState XXH_NAME2(XXH_NAMESPACE, XXH3_freeState)
-# define XXH3_copyState XXH_NAME2(XXH_NAMESPACE, XXH3_copyState)
-# define XXH3_64bits_reset XXH_NAME2(XXH_NAMESPACE, XXH3_64bits_reset)
-# define XXH3_64bits_reset_withSeed XXH_NAME2(XXH_NAMESPACE, XXH3_64bits_reset_withSeed)
-# define XXH3_64bits_reset_withSecret XXH_NAME2(XXH_NAMESPACE, XXH3_64bits_reset_withSecret)
-# define XXH3_64bits_update XXH_NAME2(XXH_NAMESPACE, XXH3_64bits_update)
-# define XXH3_64bits_digest XXH_NAME2(XXH_NAMESPACE, XXH3_64bits_digest)
-# define XXH3_generateSecret XXH_NAME2(XXH_NAMESPACE, XXH3_generateSecret)
-/* XXH3_128bits */
-# define XXH128 XXH_NAME2(XXH_NAMESPACE, XXH128)
-# define XXH3_128bits XXH_NAME2(XXH_NAMESPACE, XXH3_128bits)
-# define XXH3_128bits_withSeed XXH_NAME2(XXH_NAMESPACE, XXH3_128bits_withSeed)
-# define XXH3_128bits_withSecret XXH_NAME2(XXH_NAMESPACE, XXH3_128bits_withSecret)
-# define XXH3_128bits_reset XXH_NAME2(XXH_NAMESPACE, XXH3_128bits_reset)
-# define XXH3_128bits_reset_withSeed XXH_NAME2(XXH_NAMESPACE, XXH3_128bits_reset_withSeed)
-# define XXH3_128bits_reset_withSecret XXH_NAME2(XXH_NAMESPACE, XXH3_128bits_reset_withSecret)
-# define XXH3_128bits_update XXH_NAME2(XXH_NAMESPACE, XXH3_128bits_update)
-# define XXH3_128bits_digest XXH_NAME2(XXH_NAMESPACE, XXH3_128bits_digest)
-# define XXH128_isEqual XXH_NAME2(XXH_NAMESPACE, XXH128_isEqual)
-# define XXH128_cmp XXH_NAME2(XXH_NAMESPACE, XXH128_cmp)
-# define XXH128_canonicalFromHash XXH_NAME2(XXH_NAMESPACE, XXH128_canonicalFromHash)
-# define XXH128_hashFromCanonical XXH_NAME2(XXH_NAMESPACE, XXH128_hashFromCanonical)
-#endif
-
-
-/* *************************************
-* Version
-***************************************/
-#define XXH_VERSION_MAJOR 0
-#define XXH_VERSION_MINOR 8
-#define XXH_VERSION_RELEASE 0
-#define XXH_VERSION_NUMBER (XXH_VERSION_MAJOR *100*100 + XXH_VERSION_MINOR *100 + XXH_VERSION_RELEASE)
-XXH_PUBLIC_API unsigned XXH_versionNumber (void);
-
-
-/* ****************************
-* Definitions
-******************************/
-#include <stddef.h> /* size_t */
-typedef enum { XXH_OK=0, XXH_ERROR } XXH_errorcode;
-
-
-/*-**********************************************************************
-* 32-bit hash
-************************************************************************/
-#if !defined (__VMS) \
- && (defined (__cplusplus) \
- || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
-# include <stdint.h>
- typedef uint32_t XXH32_hash_t;
-#else
-# include <limits.h>
-# if UINT_MAX == 0xFFFFFFFFUL
- typedef unsigned int XXH32_hash_t;
-# else
-# if ULONG_MAX == 0xFFFFFFFFUL
- typedef unsigned long XXH32_hash_t;
-# else
-# error "unsupported platform: need a 32-bit type"
-# endif
-# endif
-#endif
-
-/*!
- * XXH32():
- * Calculate the 32-bit hash of sequence "length" bytes stored at memory address "input".
- * The memory between input & input+length must be valid (allocated and read-accessible).
- * "seed" can be used to alter the result predictably.
- * Speed on Core 2 Duo @ 3 GHz (single thread, SMHasher benchmark): 5.4 GB/s
- *
- * Note: XXH3 provides competitive speed for both 32-bit and 64-bit systems,
- * and offers true 64/128 bit hash results. It provides a superior level of
- * dispersion, and greatly reduces the risks of collisions.
- */
-XXH_PUBLIC_API XXH32_hash_t XXH32 (const void* input, size_t length, XXH32_hash_t seed);
-
-/******* Streaming *******/
-
-/*
- * Streaming functions generate the xxHash value from an incrememtal input.
- * This method is slower than single-call functions, due to state management.
- * For small inputs, prefer `XXH32()` and `XXH64()`, which are better optimized.
- *
- * An XXH state must first be allocated using `XXH*_createState()`.
- *
- * Start a new hash by initializing the state with a seed using `XXH*_reset()`.
- *
- * Then, feed the hash state by calling `XXH*_update()` as many times as necessary.
- *
- * The function returns an error code, with 0 meaning OK, and any other value
- * meaning there is an error.
- *
- * Finally, a hash value can be produced anytime, by using `XXH*_digest()`.
- * This function returns the nn-bits hash as an int or long long.
- *
- * It's still possible to continue inserting input into the hash state after a
- * digest, and generate new hash values later on by invoking `XXH*_digest()`.
- *
- * When done, release the state using `XXH*_freeState()`.
- */
-
-typedef struct XXH32_state_s XXH32_state_t; /* incomplete type */
-XXH_PUBLIC_API XXH32_state_t* XXH32_createState(void);
-XXH_PUBLIC_API XXH_errorcode XXH32_freeState(XXH32_state_t* statePtr);
-XXH_PUBLIC_API void XXH32_copyState(XXH32_state_t* dst_state, const XXH32_state_t* src_state);
-
-XXH_PUBLIC_API XXH_errorcode XXH32_reset (XXH32_state_t* statePtr, XXH32_hash_t seed);
-XXH_PUBLIC_API XXH_errorcode XXH32_update (XXH32_state_t* statePtr, const void* input, size_t length);
-XXH_PUBLIC_API XXH32_hash_t XXH32_digest (const XXH32_state_t* statePtr);
-
-/******* Canonical representation *******/
-
-/*
- * The default return values from XXH functions are unsigned 32 and 64 bit
- * integers.
- * This the simplest and fastest format for further post-processing.
- *
- * However, this leaves open the question of what is the order on the byte level,
- * since little and big endian conventions will store the same number differently.
- *
- * The canonical representation settles this issue by mandating big-endian
- * convention, the same convention as human-readable numbers (large digits first).
- *
- * When writing hash values to storage, sending them over a network, or printing
- * them, it's highly recommended to use the canonical representation to ensure
- * portability across a wider range of systems, present and future.
- *
- * The following functions allow transformation of hash values to and from
- * canonical format.
- */
-
-typedef struct { unsigned char digest[4]; } XXH32_canonical_t;
-XXH_PUBLIC_API void XXH32_canonicalFromHash(XXH32_canonical_t* dst, XXH32_hash_t hash);
-XXH_PUBLIC_API XXH32_hash_t XXH32_hashFromCanonical(const XXH32_canonical_t* src);
-
-
-#ifndef XXH_NO_LONG_LONG
-/*-**********************************************************************
-* 64-bit hash
-************************************************************************/
-#if !defined (__VMS) \
- && (defined (__cplusplus) \
- || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
-# include <stdint.h>
- typedef uint64_t XXH64_hash_t;
-#else
- /* the following type must have a width of 64-bit */
- typedef unsigned long long XXH64_hash_t;
-#endif
-
-/*!
- * XXH64():
- * Returns the 64-bit hash of sequence of length @length stored at memory
- * address @input.
- * @seed can be used to alter the result predictably.
- *
- * This function usually runs faster on 64-bit systems, but slower on 32-bit
- * systems (see benchmark).
- *
- * Note: XXH3 provides competitive speed for both 32-bit and 64-bit systems,
- * and offers true 64/128 bit hash results. It provides a superior level of
- * dispersion, and greatly reduces the risks of collisions.
- */
-XXH_PUBLIC_API XXH64_hash_t XXH64 (const void* input, size_t length, XXH64_hash_t seed);
-
-/******* Streaming *******/
-typedef struct XXH64_state_s XXH64_state_t; /* incomplete type */
-XXH_PUBLIC_API XXH64_state_t* XXH64_createState(void);
-XXH_PUBLIC_API XXH_errorcode XXH64_freeState(XXH64_state_t* statePtr);
-XXH_PUBLIC_API void XXH64_copyState(XXH64_state_t* dst_state, const XXH64_state_t* src_state);
-
-XXH_PUBLIC_API XXH_errorcode XXH64_reset (XXH64_state_t* statePtr, XXH64_hash_t seed);
-XXH_PUBLIC_API XXH_errorcode XXH64_update (XXH64_state_t* statePtr, const void* input, size_t length);
-XXH_PUBLIC_API XXH64_hash_t XXH64_digest (const XXH64_state_t* statePtr);
-
-/******* Canonical representation *******/
-typedef struct { unsigned char digest[sizeof(XXH64_hash_t)]; } XXH64_canonical_t;
-XXH_PUBLIC_API void XXH64_canonicalFromHash(XXH64_canonical_t* dst, XXH64_hash_t hash);
-XXH_PUBLIC_API XXH64_hash_t XXH64_hashFromCanonical(const XXH64_canonical_t* src);
-
-
-/*-**********************************************************************
-* XXH3 64-bit variant
-************************************************************************/
-
-/* ************************************************************************
- * XXH3 is a new hash algorithm featuring:
- * - Improved speed for both small and large inputs
- * - True 64-bit and 128-bit outputs
- * - SIMD acceleration
- * - Improved 32-bit viability
- *
- * Speed analysis methodology is explained here:
- *
- * https://fastcompression.blogspot.com/2019/03/presenting-xxh3.html
- *
- * In general, expect XXH3 to run about ~2x faster on large inputs and >3x
- * faster on small ones compared to XXH64, though exact differences depend on
- * the platform.
- *
- * The algorithm is portable: Like XXH32 and XXH64, it generates the same hash
- * on all platforms.
- *
- * It benefits greatly from SIMD and 64-bit arithmetic, but does not require it.
- *
- * Almost all 32-bit and 64-bit targets that can run XXH32 smoothly can run
- * XXH3 at competitive speeds, even if XXH64 runs slowly. Further details are
- * explained in the implementation.
- *
- * Optimized implementations are provided for AVX512, AVX2, SSE2, NEON, POWER8,
- * ZVector and scalar targets. This can be controlled with the XXH_VECTOR macro.
- *
- * XXH3 offers 2 variants, _64bits and _128bits.
- * When only 64 bits are needed, prefer calling the _64bits variant, as it
- * reduces the amount of mixing, resulting in faster speed on small inputs.
- *
- * It's also generally simpler to manipulate a scalar return type than a struct.
- *
- * The 128-bit version adds additional strength, but it is slightly slower.
- *
- * The XXH3 algorithm is still in development.
- * The results it produces may still change in future versions.
- *
- * Results produced by v0.7.x are not comparable with results from v0.7.y.
- * However, the API is completely stable, and it can safely be used for
- * ephemeral data (local sessions).
- *
- * Avoid storing values in long-term storage until the algorithm is finalized.
- * XXH3's return values will be officially finalized upon reaching v0.8.0.
- *
- * After which, return values of XXH3 and XXH128 will no longer change in
- * future versions.
- *
- * The API supports one-shot hashing, streaming mode, and custom secrets.
- */
-
-/* XXH3_64bits():
- * default 64-bit variant, using default secret and default seed of 0.
- * It's the fastest variant. */
-XXH_PUBLIC_API XXH64_hash_t XXH3_64bits(const void* data, size_t len);
-
-/*
- * XXH3_64bits_withSeed():
- * This variant generates a custom secret on the fly
- * based on default secret altered using the `seed` value.
- * While this operation is decently fast, note that it's not completely free.
- * Note: seed==0 produces the same results as XXH3_64bits().
- */
-XXH_PUBLIC_API XXH64_hash_t XXH3_64bits_withSeed(const void* data, size_t len, XXH64_hash_t seed);
-
-/*
- * XXH3_64bits_withSecret():
- * It's possible to provide any blob of bytes as a "secret" to generate the hash.
- * This makes it more difficult for an external actor to prepare an intentional collision.
- * The main condition is that secretSize *must* be large enough (>= XXH3_SECRET_SIZE_MIN).
- * However, the quality of produced hash values depends on secret's entropy.
- * Technically, the secret must look like a bunch of random bytes.
- * Avoid "trivial" or structured data such as repeated sequences or a text document.
- * Whenever unsure about the "randomness" of the blob of bytes,
- * consider relabelling it as a "custom seed" instead,
- * and employ "XXH3_generateSecret()" (see below)
- * to generate a high entropy secret derived from the custom seed.
- */
-#define XXH3_SECRET_SIZE_MIN 136
-XXH_PUBLIC_API XXH64_hash_t XXH3_64bits_withSecret(const void* data, size_t len, const void* secret, size_t secretSize);
-
-
-/******* Streaming *******/
-/*
- * Streaming requires state maintenance.
- * This operation costs memory and CPU.
- * As a consequence, streaming is slower than one-shot hashing.
- * For better performance, prefer one-shot functions whenever applicable.
- */
-typedef struct XXH3_state_s XXH3_state_t;
-XXH_PUBLIC_API XXH3_state_t* XXH3_createState(void);
-XXH_PUBLIC_API XXH_errorcode XXH3_freeState(XXH3_state_t* statePtr);
-XXH_PUBLIC_API void XXH3_copyState(XXH3_state_t* dst_state, const XXH3_state_t* src_state);
-
-/*
- * XXH3_64bits_reset():
- * Initialize with default parameters.
- * digest will be equivalent to `XXH3_64bits()`.
- */
-XXH_PUBLIC_API XXH_errorcode XXH3_64bits_reset(XXH3_state_t* statePtr);
-/*
- * XXH3_64bits_reset_withSeed():
- * Generate a custom secret from `seed`, and store it into `statePtr`.
- * digest will be equivalent to `XXH3_64bits_withSeed()`.
- */
-XXH_PUBLIC_API XXH_errorcode XXH3_64bits_reset_withSeed(XXH3_state_t* statePtr, XXH64_hash_t seed);
-/*
- * XXH3_64bits_reset_withSecret():
- * `secret` is referenced, it _must outlive_ the hash streaming session.
- * Similar to one-shot API, `secretSize` must be >= `XXH3_SECRET_SIZE_MIN`,
- * and the quality of produced hash values depends on secret's entropy
- * (secret's content should look like a bunch of random bytes).
- * When in doubt about the randomness of a candidate `secret`,
- * consider employing `XXH3_generateSecret()` instead (see below).
- */
-XXH_PUBLIC_API XXH_errorcode XXH3_64bits_reset_withSecret(XXH3_state_t* statePtr, const void* secret, size_t secretSize);
-
-XXH_PUBLIC_API XXH_errorcode XXH3_64bits_update (XXH3_state_t* statePtr, const void* input, size_t length);
-XXH_PUBLIC_API XXH64_hash_t XXH3_64bits_digest (const XXH3_state_t* statePtr);
-
-/* note : canonical representation of XXH3 is the same as XXH64
- * since they both produce XXH64_hash_t values */
-
-
-/*-**********************************************************************
-* XXH3 128-bit variant
-************************************************************************/
-
-typedef struct {
- XXH64_hash_t low64;
- XXH64_hash_t high64;
-} XXH128_hash_t;
-
-XXH_PUBLIC_API XXH128_hash_t XXH3_128bits(const void* data, size_t len);
-XXH_PUBLIC_API XXH128_hash_t XXH3_128bits_withSeed(const void* data, size_t len, XXH64_hash_t seed);
-XXH_PUBLIC_API XXH128_hash_t XXH3_128bits_withSecret(const void* data, size_t len, const void* secret, size_t secretSize);
-
-/******* Streaming *******/
-/*
- * Streaming requires state maintenance.
- * This operation costs memory and CPU.
- * As a consequence, streaming is slower than one-shot hashing.
- * For better performance, prefer one-shot functions whenever applicable.
- *
- * XXH3_128bits uses the same XXH3_state_t as XXH3_64bits().
- * Use already declared XXH3_createState() and XXH3_freeState().
- *
- * All reset and streaming functions have same meaning as their 64-bit counterpart.
- */
-
-XXH_PUBLIC_API XXH_errorcode XXH3_128bits_reset(XXH3_state_t* statePtr);
-XXH_PUBLIC_API XXH_errorcode XXH3_128bits_reset_withSeed(XXH3_state_t* statePtr, XXH64_hash_t seed);
-XXH_PUBLIC_API XXH_errorcode XXH3_128bits_reset_withSecret(XXH3_state_t* statePtr, const void* secret, size_t secretSize);
-
-XXH_PUBLIC_API XXH_errorcode XXH3_128bits_update (XXH3_state_t* statePtr, const void* input, size_t length);
-XXH_PUBLIC_API XXH128_hash_t XXH3_128bits_digest (const XXH3_state_t* statePtr);
-
-/* Following helper functions make it possible to compare XXH128_hast_t values.
- * Since XXH128_hash_t is a structure, this capability is not offered by the language.
- * Note: For better performance, these functions can be inlined using XXH_INLINE_ALL */
-
-/*!
- * XXH128_isEqual():
- * Return: 1 if `h1` and `h2` are equal, 0 if they are not.
- */
-XXH_PUBLIC_API int XXH128_isEqual(XXH128_hash_t h1, XXH128_hash_t h2);
-
-/*!
- * XXH128_cmp():
- *
- * This comparator is compatible with stdlib's `qsort()`/`bsearch()`.
- *
- * return: >0 if *h128_1 > *h128_2
- * =0 if *h128_1 == *h128_2
- * <0 if *h128_1 < *h128_2
- */
-XXH_PUBLIC_API int XXH128_cmp(const void* h128_1, const void* h128_2);
-
-
-/******* Canonical representation *******/
-typedef struct { unsigned char digest[sizeof(XXH128_hash_t)]; } XXH128_canonical_t;
-XXH_PUBLIC_API void XXH128_canonicalFromHash(XXH128_canonical_t* dst, XXH128_hash_t hash);
-XXH_PUBLIC_API XXH128_hash_t XXH128_hashFromCanonical(const XXH128_canonical_t* src);
-
-
-#endif /* XXH_NO_LONG_LONG */
-
-#endif /* XXHASH_H_5627135585666179 */
-
-
-
-#if defined(XXH_STATIC_LINKING_ONLY) && !defined(XXHASH_H_STATIC_13879238742)
-#define XXHASH_H_STATIC_13879238742
-/* ****************************************************************************
- * This section contains declarations which are not guaranteed to remain stable.
- * They may change in future versions, becoming incompatible with a different
- * version of the library.
- * These declarations should only be used with static linking.
- * Never use them in association with dynamic linking!
- ***************************************************************************** */
-
-/*
- * These definitions are only present to allow static allocation
- * of XXH states, on stack or in a struct, for example.
- * Never **ever** access their members directly.
- */
-
-struct XXH32_state_s {
- XXH32_hash_t total_len_32;
- XXH32_hash_t large_len;
- XXH32_hash_t v1;
- XXH32_hash_t v2;
- XXH32_hash_t v3;
- XXH32_hash_t v4;
- XXH32_hash_t mem32[4];
- XXH32_hash_t memsize;
- XXH32_hash_t reserved; /* never read nor write, might be removed in a future version */
-}; /* typedef'd to XXH32_state_t */
-
-
-#ifndef XXH_NO_LONG_LONG /* defined when there is no 64-bit support */
-
-struct XXH64_state_s {
- XXH64_hash_t total_len;
- XXH64_hash_t v1;
- XXH64_hash_t v2;
- XXH64_hash_t v3;
- XXH64_hash_t v4;
- XXH64_hash_t mem64[4];
- XXH32_hash_t memsize;
- XXH32_hash_t reserved32; /* required for padding anyway */
- XXH64_hash_t reserved64; /* never read nor write, might be removed in a future version */
-}; /* typedef'd to XXH64_state_t */
-
-#if defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L) /* C11+ */
-# include <stdalign.h>
-# define XXH_ALIGN(n) alignas(n)
-#elif defined(__GNUC__)
-# define XXH_ALIGN(n) __attribute__ ((aligned(n)))
-#elif defined(_MSC_VER)
-# define XXH_ALIGN(n) __declspec(align(n))
-#else
-# define XXH_ALIGN(n) /* disabled */
-#endif
-
-/* Old GCC versions only accept the attribute after the type in structures. */
-#if !(defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L)) /* C11+ */ \
- && defined(__GNUC__)
-# define XXH_ALIGN_MEMBER(align, type) type XXH_ALIGN(align)
-#else
-# define XXH_ALIGN_MEMBER(align, type) XXH_ALIGN(align) type
-#endif
-
-#define XXH3_INTERNALBUFFER_SIZE 256
-#define XXH3_SECRET_DEFAULT_SIZE 192
-struct XXH3_state_s {
- XXH_ALIGN_MEMBER(64, XXH64_hash_t acc[8]);
- /* used to store a custom secret generated from a seed */
- XXH_ALIGN_MEMBER(64, unsigned char customSecret[XXH3_SECRET_DEFAULT_SIZE]);
- XXH_ALIGN_MEMBER(64, unsigned char buffer[XXH3_INTERNALBUFFER_SIZE]);
- XXH32_hash_t bufferedSize;
- XXH32_hash_t reserved32;
- size_t nbStripesSoFar;
- XXH64_hash_t totalLen;
- size_t nbStripesPerBlock;
- size_t secretLimit;
- XXH64_hash_t seed;
- XXH64_hash_t reserved64;
- const unsigned char* extSecret; /* reference to external secret;
- * if == NULL, use .customSecret instead */
- /* note: there may be some padding at the end due to alignment on 64 bytes */
-}; /* typedef'd to XXH3_state_t */
-
-#undef XXH_ALIGN_MEMBER
-
-/* When the XXH3_state_t structure is merely emplaced on stack,
- * it should be initialized with XXH3_INITSTATE() or a memset()
- * in case its first reset uses XXH3_NNbits_reset_withSeed().
- * This init can be omitted if the first reset uses default or _withSecret mode.
- * This operation isn't necessary when the state is created with XXH3_createState().
- * Note that this doesn't prepare the state for a streaming operation,
- * it's still necessary to use XXH3_NNbits_reset*() afterwards.
- */
-#define XXH3_INITSTATE(XXH3_state_ptr) { (XXH3_state_ptr)->seed = 0; }
-
-
-/* === Experimental API === */
-/* Symbols defined below must be considered tied to a specific library version. */
-
-/*
- * XXH3_generateSecret():
- *
- * Derive a high-entropy secret from any user-defined content, named customSeed.
- * The generated secret can be used in combination with `*_withSecret()` functions.
- * The `_withSecret()` variants are useful to provide a higher level of protection than 64-bit seed,
- * as it becomes much more difficult for an external actor to guess how to impact the calculation logic.
- *
- * The function accepts as input a custom seed of any length and any content,
- * and derives from it a high-entropy secret of length XXH3_SECRET_DEFAULT_SIZE
- * into an already allocated buffer secretBuffer.
- * The generated secret is _always_ XXH_SECRET_DEFAULT_SIZE bytes long.
- *
- * The generated secret can then be used with any `*_withSecret()` variant.
- * Functions `XXH3_128bits_withSecret()`, `XXH3_64bits_withSecret()`,
- * `XXH3_128bits_reset_withSecret()` and `XXH3_64bits_reset_withSecret()`
- * are part of this list. They all accept a `secret` parameter
- * which must be very long for implementation reasons (>= XXH3_SECRET_SIZE_MIN)
- * _and_ feature very high entropy (consist of random-looking bytes).
- * These conditions can be a high bar to meet, so
- * this function can be used to generate a secret of proper quality.
- *
- * customSeed can be anything. It can have any size, even small ones,
- * and its content can be anything, even stupidly "low entropy" source such as a bunch of zeroes.
- * The resulting `secret` will nonetheless provide all expected qualities.
- *
- * Supplying NULL as the customSeed copies the default secret into `secretBuffer`.
- * When customSeedSize > 0, supplying NULL as customSeed is undefined behavior.
- */
-XXH_PUBLIC_API void XXH3_generateSecret(void* secretBuffer, const void* customSeed, size_t customSeedSize);
-
-
-/* simple short-cut to pre-selected XXH3_128bits variant */
-XXH_PUBLIC_API XXH128_hash_t XXH128(const void* data, size_t len, XXH64_hash_t seed);
-
-
-#endif /* XXH_NO_LONG_LONG */
-
-
-#if defined(XXH_INLINE_ALL) || defined(XXH_PRIVATE_API)
-# define XXH_IMPLEMENTATION
-#endif
-
-#endif /* defined(XXH_STATIC_LINKING_ONLY) && !defined(XXHASH_H_STATIC_13879238742) */
-
-
-/* ======================================================================== */
-/* ======================================================================== */
-/* ======================================================================== */
-
-
-/*-**********************************************************************
- * xxHash implementation
- *-**********************************************************************
- * xxHash's implementation used to be hosted inside xxhash.c.
- *
- * However, inlining requires implementation to be visible to the compiler,
- * hence be included alongside the header.
- * Previously, implementation was hosted inside xxhash.c,
- * which was then #included when inlining was activated.
- * This construction created issues with a few build and install systems,
- * as it required xxhash.c to be stored in /include directory.
- *
- * xxHash implementation is now directly integrated within xxhash.h.
- * As a consequence, xxhash.c is no longer needed in /include.
- *
- * xxhash.c is still available and is still useful.
- * In a "normal" setup, when xxhash is not inlined,
- * xxhash.h only exposes the prototypes and public symbols,
- * while xxhash.c can be built into an object file xxhash.o
- * which can then be linked into the final binary.
- ************************************************************************/
-
-#if ( defined(XXH_INLINE_ALL) || defined(XXH_PRIVATE_API) \
- || defined(XXH_IMPLEMENTATION) ) && !defined(XXH_IMPLEM_13a8737387)
-# define XXH_IMPLEM_13a8737387
-
-/* *************************************
-* Tuning parameters
-***************************************/
-/*!
- * XXH_FORCE_MEMORY_ACCESS:
- * By default, access to unaligned memory is controlled by `memcpy()`, which is
- * safe and portable.
- *
- * Unfortunately, on some target/compiler combinations, the generated assembly
- * is sub-optimal.
- *
- * The below switch allow selection of a different access method
- * in the search for improved performance.
- * Method 0 (default):
- * Use `memcpy()`. Safe and portable. Default.
- * Method 1:
- * `__attribute__((packed))` statement. It depends on compiler extensions
- * and is therefore not portable.
- * This method is safe if your compiler supports it, and *generally* as
- * fast or faster than `memcpy`.
- * Method 2:
- * Direct access via cast. This method doesn't depend on the compiler but
- * violates the C standard.
- * It can generate buggy code on targets which do not support unaligned
- * memory accesses.
- * But in some circumstances, it's the only known way to get the most
- * performance (example: GCC + ARMv6)
- * Method 3:
- * Byteshift. This can generate the best code on old compilers which don't
- * inline small `memcpy()` calls, and it might also be faster on big-endian
- * systems which lack a native byteswap instruction.
- * See https://stackoverflow.com/a/32095106/646947 for details.
- * Prefer these methods in priority order (0 > 1 > 2 > 3)
- */
-#ifndef XXH_FORCE_MEMORY_ACCESS /* can be defined externally, on command line for example */
-# if !defined(__clang__) && defined(__GNUC__) && defined(__ARM_FEATURE_UNALIGNED) && defined(__ARM_ARCH) && (__ARM_ARCH == 6)
-# define XXH_FORCE_MEMORY_ACCESS 2
-# elif !defined(__clang__) && ((defined(__INTEL_COMPILER) && !defined(_WIN32)) || \
- (defined(__GNUC__) && (defined(__ARM_ARCH) && __ARM_ARCH >= 7)))
-# define XXH_FORCE_MEMORY_ACCESS 1
-# endif
-#endif
-
-/*!
- * XXH_ACCEPT_NULL_INPUT_POINTER:
- * If the input pointer is NULL, xxHash's default behavior is to dereference it,
- * triggering a segfault.
- * When this macro is enabled, xxHash actively checks the input for a null pointer.
- * If it is, the result for null input pointers is the same as a zero-length input.
- */
-#ifndef XXH_ACCEPT_NULL_INPUT_POINTER /* can be defined externally */
-# define XXH_ACCEPT_NULL_INPUT_POINTER 0
-#endif
-
-/*!
- * XXH_FORCE_ALIGN_CHECK:
- * This is an important performance trick
- * for architectures without decent unaligned memory access performance.
- * It checks for input alignment, and when conditions are met,
- * uses a "fast path" employing direct 32-bit/64-bit read,
- * resulting in _dramatically faster_ read speed.
- *
- * The check costs one initial branch per hash, which is generally negligible, but not zero.
- * Moreover, it's not useful to generate binary for an additional code path
- * if memory access uses same instruction for both aligned and unaligned adresses.
- *
- * In these cases, the alignment check can be removed by setting this macro to 0.
- * Then the code will always use unaligned memory access.
- * Align check is automatically disabled on x86, x64 & arm64,
- * which are platforms known to offer good unaligned memory accesses performance.
- *
- * This option does not affect XXH3 (only XXH32 and XXH64).
- */
-#ifndef XXH_FORCE_ALIGN_CHECK /* can be defined externally */
-# if defined(__i386) || defined(__x86_64__) || defined(__aarch64__) \
- || defined(_M_IX86) || defined(_M_X64) || defined(_M_ARM64) /* visual */
-# define XXH_FORCE_ALIGN_CHECK 0
-# else
-# define XXH_FORCE_ALIGN_CHECK 1
-# endif
-#endif
-
-/*!
- * XXH_NO_INLINE_HINTS:
- *
- * By default, xxHash tries to force the compiler to inline almost all internal
- * functions.
- *
- * This can usually improve performance due to reduced jumping and improved
- * constant folding, but significantly increases the size of the binary which
- * might not be favorable.
- *
- * Additionally, sometimes the forced inlining can be detrimental to performance,
- * depending on the architecture.
- *
- * XXH_NO_INLINE_HINTS marks all internal functions as static, giving the
- * compiler full control on whether to inline or not.
- *
- * When not optimizing (-O0), optimizing for size (-Os, -Oz), or using
- * -fno-inline with GCC or Clang, this will automatically be defined.
- */
-#ifndef XXH_NO_INLINE_HINTS
-# if defined(__OPTIMIZE_SIZE__) /* -Os, -Oz */ \
- || defined(__NO_INLINE__) /* -O0, -fno-inline */
-# define XXH_NO_INLINE_HINTS 1
-# else
-# define XXH_NO_INLINE_HINTS 0
-# endif
-#endif
-
-/*!
- * XXH_REROLL:
- * Whether to reroll XXH32_finalize, and XXH64_finalize,
- * instead of using an unrolled jump table/if statement loop.
- *
- * This is automatically defined on -Os/-Oz on GCC and Clang.
- */
-#ifndef XXH_REROLL
-# if defined(__OPTIMIZE_SIZE__)
-# define XXH_REROLL 1
-# else
-# define XXH_REROLL 0
-# endif
-#endif
-
-
-/* *************************************
-* Includes & Memory related functions
-***************************************/
-/*!
- * Modify the local functions below should you wish to use
- * different memory routines for malloc() and free()
- */
-#include <stdlib.h>
-
-static void* XXH_malloc(size_t s) { return malloc(s); }
-static void XXH_free(void* p) { free(p); }
-
-/*! and for memcpy() */
-#include <string.h>
-static void* XXH_memcpy(void* dest, const void* src, size_t size)
-{
- return memcpy(dest,src,size);
-}
-
-#include <limits.h> /* ULLONG_MAX */
-
-
-/* *************************************
-* Compiler Specific Options
-***************************************/
-#ifdef _MSC_VER /* Visual Studio warning fix */
-# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
-#endif
-
-#if XXH_NO_INLINE_HINTS /* disable inlining hints */
-# if defined(__GNUC__)
-# define XXH_FORCE_INLINE static __attribute__((unused))
-# else
-# define XXH_FORCE_INLINE static
-# endif
-# define XXH_NO_INLINE static
-/* enable inlining hints */
-#elif defined(_MSC_VER) /* Visual Studio */
-# define XXH_FORCE_INLINE static __forceinline
-# define XXH_NO_INLINE static __declspec(noinline)
-#elif defined(__GNUC__)
-# define XXH_FORCE_INLINE static __inline__ __attribute__((always_inline, unused))
-# define XXH_NO_INLINE static __attribute__((noinline))
-#elif defined (__cplusplus) \
- || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)) /* C99 */
-# define XXH_FORCE_INLINE static inline
-# define XXH_NO_INLINE static
-#else
-# define XXH_FORCE_INLINE static
-# define XXH_NO_INLINE static
-#endif
-
-
-
-/* *************************************
-* Debug
-***************************************/
-/*
- * XXH_DEBUGLEVEL is expected to be defined externally, typically via the
- * compiler's command line options. The value must be a number.
- */
-#ifndef XXH_DEBUGLEVEL
-# ifdef DEBUGLEVEL /* backwards compat */
-# define XXH_DEBUGLEVEL DEBUGLEVEL
-# else
-# define XXH_DEBUGLEVEL 0
-# endif
-#endif
-
-#if (XXH_DEBUGLEVEL>=1)
-# include <assert.h> /* note: can still be disabled with NDEBUG */
-# define XXH_ASSERT(c) assert(c)
-#else
-# define XXH_ASSERT(c) ((void)0)
-#endif
-
-/* note: use after variable declarations */
-#define XXH_STATIC_ASSERT(c) do { enum { XXH_sa = 1/(int)(!!(c)) }; } while (0)
-
-
-/* *************************************
-* Basic Types
-***************************************/
-#if !defined (__VMS) \
- && (defined (__cplusplus) \
- || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
-# include <stdint.h>
- typedef uint8_t xxh_u8;
-#else
- typedef unsigned char xxh_u8;
-#endif
-typedef XXH32_hash_t xxh_u32;
-
-#ifdef XXH_OLD_NAMES
-# define BYTE xxh_u8
-# define U8 xxh_u8
-# define U32 xxh_u32
-#endif
-
-/* *** Memory access *** */
-
-#if (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==3))
-/*
- * Manual byteshift. Best for old compilers which don't inline memcpy.
- * We actually directly use XXH_readLE32 and XXH_readBE32.
- */
-#elif (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==2))
-
-/*
- * Force direct memory access. Only works on CPU which support unaligned memory
- * access in hardware.
- */
-static xxh_u32 XXH_read32(const void* memPtr) { return *(const xxh_u32*) memPtr; }
-
-#elif (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==1))
-
-/*
- * __pack instructions are safer but compiler specific, hence potentially
- * problematic for some compilers.
- *
- * Currently only defined for GCC and ICC.
- */
-#ifdef XXH_OLD_NAMES
-typedef union { xxh_u32 u32; } __attribute__((packed)) unalign;
-#endif
-static xxh_u32 XXH_read32(const void* ptr)
-{
- typedef union { xxh_u32 u32; } __attribute__((packed)) xxh_unalign;
- return ((const xxh_unalign*)ptr)->u32;
-}
-
-#else
-
-/*
- * Portable and safe solution. Generally efficient.
- * see: https://stackoverflow.com/a/32095106/646947
- */
-static xxh_u32 XXH_read32(const void* memPtr)
-{
- xxh_u32 val;
- memcpy(&val, memPtr, sizeof(val));
- return val;
-}
-
-#endif /* XXH_FORCE_DIRECT_MEMORY_ACCESS */
-
-
-/* *** Endianess *** */
-typedef enum { XXH_bigEndian=0, XXH_littleEndian=1 } XXH_endianess;
-
-/*!
- * XXH_CPU_LITTLE_ENDIAN:
- * Defined to 1 if the target is little endian, or 0 if it is big endian.
- * It can be defined externally, for example on the compiler command line.
- *
- * If it is not defined, a runtime check (which is usually constant folded)
- * is used instead.
- */
-#ifndef XXH_CPU_LITTLE_ENDIAN
-/*
- * Try to detect endianness automatically, to avoid the nonstandard behavior
- * in `XXH_isLittleEndian()`
- */
-# if defined(_WIN32) /* Windows is always little endian */ \
- || defined(__LITTLE_ENDIAN__) \
- || (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
-# define XXH_CPU_LITTLE_ENDIAN 1
-# elif defined(__BIG_ENDIAN__) \
- || (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
-# define XXH_CPU_LITTLE_ENDIAN 0
-# else
-/*
- * runtime test, presumed to simplify to a constant by compiler
- */
-static int XXH_isLittleEndian(void)
-{
- /*
- * Portable and well-defined behavior.
- * Don't use static: it is detrimental to performance.
- */
- const union { xxh_u32 u; xxh_u8 c[4]; } one = { 1 };
- return one.c[0];
-}
-# define XXH_CPU_LITTLE_ENDIAN XXH_isLittleEndian()
-# endif
-#endif
-
-
-
-
-/* ****************************************
-* Compiler-specific Functions and Macros
-******************************************/
-#define XXH_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
-
-#ifdef __has_builtin
-# define XXH_HAS_BUILTIN(x) __has_builtin(x)
-#else
-# define XXH_HAS_BUILTIN(x) 0
-#endif
-
-#if !defined(NO_CLANG_BUILTIN) && XXH_HAS_BUILTIN(__builtin_rotateleft32) \
- && XXH_HAS_BUILTIN(__builtin_rotateleft64)
-# define XXH_rotl32 __builtin_rotateleft32
-# define XXH_rotl64 __builtin_rotateleft64
-/* Note: although _rotl exists for minGW (GCC under windows), performance seems poor */
-#elif defined(_MSC_VER)
-# define XXH_rotl32(x,r) _rotl(x,r)
-# define XXH_rotl64(x,r) _rotl64(x,r)
-#else
-# define XXH_rotl32(x,r) (((x) << (r)) | ((x) >> (32 - (r))))
-# define XXH_rotl64(x,r) (((x) << (r)) | ((x) >> (64 - (r))))
-#endif
-
-#if defined(_MSC_VER) /* Visual Studio */
-# define XXH_swap32 _byteswap_ulong
-#elif XXH_GCC_VERSION >= 403
-# define XXH_swap32 __builtin_bswap32
-#else
-static xxh_u32 XXH_swap32 (xxh_u32 x)
-{
- return ((x << 24) & 0xff000000 ) |
- ((x << 8) & 0x00ff0000 ) |
- ((x >> 8) & 0x0000ff00 ) |
- ((x >> 24) & 0x000000ff );
-}
-#endif
-
-
-/* ***************************
-* Memory reads
-*****************************/
-typedef enum { XXH_aligned, XXH_unaligned } XXH_alignment;
-
-/*
- * XXH_FORCE_MEMORY_ACCESS==3 is an endian-independent byteshift load.
- *
- * This is ideal for older compilers which don't inline memcpy.
- */
-#if (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==3))
-
-XXH_FORCE_INLINE xxh_u32 XXH_readLE32(const void* memPtr)
-{
- const xxh_u8* bytePtr = (const xxh_u8 *)memPtr;
- return bytePtr[0]
- | ((xxh_u32)bytePtr[1] << 8)
- | ((xxh_u32)bytePtr[2] << 16)
- | ((xxh_u32)bytePtr[3] << 24);
-}
-
-XXH_FORCE_INLINE xxh_u32 XXH_readBE32(const void* memPtr)
-{
- const xxh_u8* bytePtr = (const xxh_u8 *)memPtr;
- return bytePtr[3]
- | ((xxh_u32)bytePtr[2] << 8)
- | ((xxh_u32)bytePtr[1] << 16)
- | ((xxh_u32)bytePtr[0] << 24);
-}
-
-#else
-XXH_FORCE_INLINE xxh_u32 XXH_readLE32(const void* ptr)
-{
- return XXH_CPU_LITTLE_ENDIAN ? XXH_read32(ptr) : XXH_swap32(XXH_read32(ptr));
-}
-
-static xxh_u32 XXH_readBE32(const void* ptr)
-{
- return XXH_CPU_LITTLE_ENDIAN ? XXH_swap32(XXH_read32(ptr)) : XXH_read32(ptr);
-}
-#endif
-
-XXH_FORCE_INLINE xxh_u32
-XXH_readLE32_align(const void* ptr, XXH_alignment align)
-{
- if (align==XXH_unaligned) {
- return XXH_readLE32(ptr);
- } else {
- return XXH_CPU_LITTLE_ENDIAN ? *(const xxh_u32*)ptr : XXH_swap32(*(const xxh_u32*)ptr);
- }
-}
-
-
-/* *************************************
-* Misc
-***************************************/
-XXH_PUBLIC_API unsigned XXH_versionNumber (void) { return XXH_VERSION_NUMBER; }
-
-
-/* *******************************************************************
-* 32-bit hash functions
-*********************************************************************/
-static const xxh_u32 XXH_PRIME32_1 = 0x9E3779B1U; /* 0b10011110001101110111100110110001 */
-static const xxh_u32 XXH_PRIME32_2 = 0x85EBCA77U; /* 0b10000101111010111100101001110111 */
-static const xxh_u32 XXH_PRIME32_3 = 0xC2B2AE3DU; /* 0b11000010101100101010111000111101 */
-static const xxh_u32 XXH_PRIME32_4 = 0x27D4EB2FU; /* 0b00100111110101001110101100101111 */
-static const xxh_u32 XXH_PRIME32_5 = 0x165667B1U; /* 0b00010110010101100110011110110001 */
-
-#ifdef XXH_OLD_NAMES
-# define PRIME32_1 XXH_PRIME32_1
-# define PRIME32_2 XXH_PRIME32_2
-# define PRIME32_3 XXH_PRIME32_3
-# define PRIME32_4 XXH_PRIME32_4
-# define PRIME32_5 XXH_PRIME32_5
-#endif
-
-static xxh_u32 XXH32_round(xxh_u32 acc, xxh_u32 input)
-{
- acc += input * XXH_PRIME32_2;
- acc = XXH_rotl32(acc, 13);
- acc *= XXH_PRIME32_1;
-#if defined(__GNUC__) && defined(__SSE4_1__) && !defined(XXH_ENABLE_AUTOVECTORIZE)
- /*
- * UGLY HACK:
- * This inline assembly hack forces acc into a normal register. This is the
- * only thing that prevents GCC and Clang from autovectorizing the XXH32
- * loop (pragmas and attributes don't work for some resason) without globally
- * disabling SSE4.1.
- *
- * The reason we want to avoid vectorization is because despite working on
- * 4 integers at a time, there are multiple factors slowing XXH32 down on
- * SSE4:
- * - There's a ridiculous amount of lag from pmulld (10 cycles of latency on
- * newer chips!) making it slightly slower to multiply four integers at
- * once compared to four integers independently. Even when pmulld was
- * fastest, Sandy/Ivy Bridge, it is still not worth it to go into SSE
- * just to multiply unless doing a long operation.
- *
- * - Four instructions are required to rotate,
- * movqda tmp, v // not required with VEX encoding
- * pslld tmp, 13 // tmp <<= 13
- * psrld v, 19 // x >>= 19
- * por v, tmp // x |= tmp
- * compared to one for scalar:
- * roll v, 13 // reliably fast across the board
- * shldl v, v, 13 // Sandy Bridge and later prefer this for some reason
- *
- * - Instruction level parallelism is actually more beneficial here because
- * the SIMD actually serializes this operation: While v1 is rotating, v2
- * can load data, while v3 can multiply. SSE forces them to operate
- * together.
- *
- * How this hack works:
- * __asm__("" // Declare an assembly block but don't declare any instructions
- * : // However, as an Input/Output Operand,
- * "+r" // constrain a read/write operand (+) as a general purpose register (r).
- * (acc) // and set acc as the operand
- * );
- *
- * Because of the 'r', the compiler has promised that seed will be in a
- * general purpose register and the '+' says that it will be 'read/write',
- * so it has to assume it has changed. It is like volatile without all the
- * loads and stores.
- *
- * Since the argument has to be in a normal register (not an SSE register),
- * each time XXH32_round is called, it is impossible to vectorize.
- */
- __asm__("" : "+r" (acc));
-#endif
- return acc;
-}
-
-/* mix all bits */
-static xxh_u32 XXH32_avalanche(xxh_u32 h32)
-{
- h32 ^= h32 >> 15;
- h32 *= XXH_PRIME32_2;
- h32 ^= h32 >> 13;
- h32 *= XXH_PRIME32_3;
- h32 ^= h32 >> 16;
- return(h32);
-}
-
-#define XXH_get32bits(p) XXH_readLE32_align(p, align)
-
-static xxh_u32
-XXH32_finalize(xxh_u32 h32, const xxh_u8* ptr, size_t len, XXH_alignment align)
-{
-#define XXH_PROCESS1 do { \
- h32 += (*ptr++) * XXH_PRIME32_5; \
- h32 = XXH_rotl32(h32, 11) * XXH_PRIME32_1; \
-} while (0)
-
-#define XXH_PROCESS4 do { \
- h32 += XXH_get32bits(ptr) * XXH_PRIME32_3; \
- ptr += 4; \
- h32 = XXH_rotl32(h32, 17) * XXH_PRIME32_4; \
-} while (0)
-
- /* Compact rerolled version */
- if (XXH_REROLL) {
- len &= 15;
- while (len >= 4) {
- XXH_PROCESS4;
- len -= 4;
- }
- while (len > 0) {
- XXH_PROCESS1;
- --len;
- }
- return XXH32_avalanche(h32);
- } else {
- switch(len&15) /* or switch(bEnd - p) */ {
- case 12: XXH_PROCESS4;
- /* fallthrough */
- case 8: XXH_PROCESS4;
- /* fallthrough */
- case 4: XXH_PROCESS4;
- return XXH32_avalanche(h32);
-
- case 13: XXH_PROCESS4;
- /* fallthrough */
- case 9: XXH_PROCESS4;
- /* fallthrough */
- case 5: XXH_PROCESS4;
- XXH_PROCESS1;
- return XXH32_avalanche(h32);
-
- case 14: XXH_PROCESS4;
- /* fallthrough */
- case 10: XXH_PROCESS4;
- /* fallthrough */
- case 6: XXH_PROCESS4;
- XXH_PROCESS1;
- XXH_PROCESS1;
- return XXH32_avalanche(h32);
-
- case 15: XXH_PROCESS4;
- /* fallthrough */
- case 11: XXH_PROCESS4;
- /* fallthrough */
- case 7: XXH_PROCESS4;
- /* fallthrough */
- case 3: XXH_PROCESS1;
- /* fallthrough */
- case 2: XXH_PROCESS1;
- /* fallthrough */
- case 1: XXH_PROCESS1;
- /* fallthrough */
- case 0: return XXH32_avalanche(h32);
- }
- XXH_ASSERT(0);
- return h32; /* reaching this point is deemed impossible */
- }
-}
-
-#ifdef XXH_OLD_NAMES
-# define PROCESS1 XXH_PROCESS1
-# define PROCESS4 XXH_PROCESS4
-#else
-# undef XXH_PROCESS1
-# undef XXH_PROCESS4
-#endif
-
-XXH_FORCE_INLINE xxh_u32
-XXH32_endian_align(const xxh_u8* input, size_t len, xxh_u32 seed, XXH_alignment align)
-{
- const xxh_u8* bEnd = input + len;
- xxh_u32 h32;
-
-#if defined(XXH_ACCEPT_NULL_INPUT_POINTER) && (XXH_ACCEPT_NULL_INPUT_POINTER>=1)
- if (input==NULL) {
- len=0;
- bEnd=input=(const xxh_u8*)(size_t)16;
- }
-#endif
-
- if (len>=16) {
- const xxh_u8* const limit = bEnd - 15;
- xxh_u32 v1 = seed + XXH_PRIME32_1 + XXH_PRIME32_2;
- xxh_u32 v2 = seed + XXH_PRIME32_2;
- xxh_u32 v3 = seed + 0;
- xxh_u32 v4 = seed - XXH_PRIME32_1;
-
- do {
- v1 = XXH32_round(v1, XXH_get32bits(input)); input += 4;
- v2 = XXH32_round(v2, XXH_get32bits(input)); input += 4;
- v3 = XXH32_round(v3, XXH_get32bits(input)); input += 4;
- v4 = XXH32_round(v4, XXH_get32bits(input)); input += 4;
- } while (input < limit);
-
- h32 = XXH_rotl32(v1, 1) + XXH_rotl32(v2, 7)
- + XXH_rotl32(v3, 12) + XXH_rotl32(v4, 18);
- } else {
- h32 = seed + XXH_PRIME32_5;
- }
-
- h32 += (xxh_u32)len;
-
- return XXH32_finalize(h32, input, len&15, align);
-}
-
-
-XXH_PUBLIC_API XXH32_hash_t XXH32 (const void* input, size_t len, XXH32_hash_t seed)
-{
-#if 0
- /* Simple version, good for code maintenance, but unfortunately slow for small inputs */
- XXH32_state_t state;
- XXH32_reset(&state, seed);
- XXH32_update(&state, (const xxh_u8*)input, len);
- return XXH32_digest(&state);
-
-#else
-
- if (XXH_FORCE_ALIGN_CHECK) {
- if ((((size_t)input) & 3) == 0) { /* Input is 4-bytes aligned, leverage the speed benefit */
- return XXH32_endian_align((const xxh_u8*)input, len, seed, XXH_aligned);
- } }
-
- return XXH32_endian_align((const xxh_u8*)input, len, seed, XXH_unaligned);
-#endif
-}
-
-
-
-/******* Hash streaming *******/
-
-XXH_PUBLIC_API XXH32_state_t* XXH32_createState(void)
-{
- return (XXH32_state_t*)XXH_malloc(sizeof(XXH32_state_t));
-}
-XXH_PUBLIC_API XXH_errorcode XXH32_freeState(XXH32_state_t* statePtr)
-{
- XXH_free(statePtr);
- return XXH_OK;
-}
-
-XXH_PUBLIC_API void XXH32_copyState(XXH32_state_t* dstState, const XXH32_state_t* srcState)
-{
- memcpy(dstState, srcState, sizeof(*dstState));
-}
-
-XXH_PUBLIC_API XXH_errorcode XXH32_reset(XXH32_state_t* statePtr, XXH32_hash_t seed)
-{
- XXH32_state_t state; /* using a local state to memcpy() in order to avoid strict-aliasing warnings */
- memset(&state, 0, sizeof(state));
- state.v1 = seed + XXH_PRIME32_1 + XXH_PRIME32_2;
- state.v2 = seed + XXH_PRIME32_2;
- state.v3 = seed + 0;
- state.v4 = seed - XXH_PRIME32_1;
- /* do not write into reserved, planned to be removed in a future version */
- memcpy(statePtr, &state, sizeof(state) - sizeof(state.reserved));
- return XXH_OK;
-}
-
-
-XXH_PUBLIC_API XXH_errorcode
-XXH32_update(XXH32_state_t* state, const void* input, size_t len)
-{
- if (input==NULL)
-#if defined(XXH_ACCEPT_NULL_INPUT_POINTER) && (XXH_ACCEPT_NULL_INPUT_POINTER>=1)
- return XXH_OK;
-#else
- return XXH_ERROR;
-#endif
-
- { const xxh_u8* p = (const xxh_u8*)input;
- const xxh_u8* const bEnd = p + len;
-
- state->total_len_32 += (XXH32_hash_t)len;
- state->large_len |= (XXH32_hash_t)((len>=16) | (state->total_len_32>=16));
-
- if (state->memsize + len < 16) { /* fill in tmp buffer */
- XXH_memcpy((xxh_u8*)(state->mem32) + state->memsize, input, len);
- state->memsize += (XXH32_hash_t)len;
- return XXH_OK;
- }
-
- if (state->memsize) { /* some data left from previous update */
- XXH_memcpy((xxh_u8*)(state->mem32) + state->memsize, input, 16-state->memsize);
- { const xxh_u32* p32 = state->mem32;
- state->v1 = XXH32_round(state->v1, XXH_readLE32(p32)); p32++;
- state->v2 = XXH32_round(state->v2, XXH_readLE32(p32)); p32++;
- state->v3 = XXH32_round(state->v3, XXH_readLE32(p32)); p32++;
- state->v4 = XXH32_round(state->v4, XXH_readLE32(p32));
- }
- p += 16-state->memsize;
- state->memsize = 0;
- }
-
- if (p <= bEnd-16) {
- const xxh_u8* const limit = bEnd - 16;
- xxh_u32 v1 = state->v1;
- xxh_u32 v2 = state->v2;
- xxh_u32 v3 = state->v3;
- xxh_u32 v4 = state->v4;
-
- do {
- v1 = XXH32_round(v1, XXH_readLE32(p)); p+=4;
- v2 = XXH32_round(v2, XXH_readLE32(p)); p+=4;
- v3 = XXH32_round(v3, XXH_readLE32(p)); p+=4;
- v4 = XXH32_round(v4, XXH_readLE32(p)); p+=4;
- } while (p<=limit);
-
- state->v1 = v1;
- state->v2 = v2;
- state->v3 = v3;
- state->v4 = v4;
- }
-
- if (p < bEnd) {
- XXH_memcpy(state->mem32, p, (size_t)(bEnd-p));
- state->memsize = (unsigned)(bEnd-p);
- }
- }
-
- return XXH_OK;
-}
-
-
-XXH_PUBLIC_API XXH32_hash_t XXH32_digest (const XXH32_state_t* state)
-{
- xxh_u32 h32;
-
- if (state->large_len) {
- h32 = XXH_rotl32(state->v1, 1)
- + XXH_rotl32(state->v2, 7)
- + XXH_rotl32(state->v3, 12)
- + XXH_rotl32(state->v4, 18);
- } else {
- h32 = state->v3 /* == seed */ + XXH_PRIME32_5;
- }
-
- h32 += state->total_len_32;
-
- return XXH32_finalize(h32, (const xxh_u8*)state->mem32, state->memsize, XXH_aligned);
-}
-
-
-/******* Canonical representation *******/
-
-/*
- * The default return values from XXH functions are unsigned 32 and 64 bit
- * integers.
- *
- * The canonical representation uses big endian convention, the same convention
- * as human-readable numbers (large digits first).
- *
- * This way, hash values can be written into a file or buffer, remaining
- * comparable across different systems.
- *
- * The following functions allow transformation of hash values to and from their
- * canonical format.
- */
-XXH_PUBLIC_API void XXH32_canonicalFromHash(XXH32_canonical_t* dst, XXH32_hash_t hash)
-{
- XXH_STATIC_ASSERT(sizeof(XXH32_canonical_t) == sizeof(XXH32_hash_t));
- if (XXH_CPU_LITTLE_ENDIAN) hash = XXH_swap32(hash);
- memcpy(dst, &hash, sizeof(*dst));
-}
-
-XXH_PUBLIC_API XXH32_hash_t XXH32_hashFromCanonical(const XXH32_canonical_t* src)
-{
- return XXH_readBE32(src);
-}
-
-
-#ifndef XXH_NO_LONG_LONG
-
-/* *******************************************************************
-* 64-bit hash functions
-*********************************************************************/
-
-/******* Memory access *******/
-
-typedef XXH64_hash_t xxh_u64;
-
-#ifdef XXH_OLD_NAMES
-# define U64 xxh_u64
-#endif
-
-/*!
- * XXH_REROLL_XXH64:
- * Whether to reroll the XXH64_finalize() loop.
- *
- * Just like XXH32, we can unroll the XXH64_finalize() loop. This can be a
- * performance gain on 64-bit hosts, as only one jump is required.
- *
- * However, on 32-bit hosts, because arithmetic needs to be done with two 32-bit
- * registers, and 64-bit arithmetic needs to be simulated, it isn't beneficial
- * to unroll. The code becomes ridiculously large (the largest function in the
- * binary on i386!), and rerolling it saves anywhere from 3kB to 20kB. It is
- * also slightly faster because it fits into cache better and is more likely
- * to be inlined by the compiler.
- *
- * If XXH_REROLL is defined, this is ignored and the loop is always rerolled.
- */
-#ifndef XXH_REROLL_XXH64
-# if (defined(__ILP32__) || defined(_ILP32)) /* ILP32 is often defined on 32-bit GCC family */ \
- || !(defined(__x86_64__) || defined(_M_X64) || defined(_M_AMD64) /* x86-64 */ \
- || defined(_M_ARM64) || defined(__aarch64__) || defined(__arm64__) /* aarch64 */ \
- || defined(__PPC64__) || defined(__PPC64LE__) || defined(__ppc64__) || defined(__powerpc64__) /* ppc64 */ \
- || defined(__mips64__) || defined(__mips64)) /* mips64 */ \
- || (!defined(SIZE_MAX) || SIZE_MAX < ULLONG_MAX) /* check limits */
-# define XXH_REROLL_XXH64 1
-# else
-# define XXH_REROLL_XXH64 0
-# endif
-#endif /* !defined(XXH_REROLL_XXH64) */
-
-#if (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==3))
-/*
- * Manual byteshift. Best for old compilers which don't inline memcpy.
- * We actually directly use XXH_readLE64 and XXH_readBE64.
- */
-#elif (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==2))
-
-/* Force direct memory access. Only works on CPU which support unaligned memory access in hardware */
-static xxh_u64 XXH_read64(const void* memPtr) { return *(const xxh_u64*) memPtr; }
-
-#elif (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==1))
-
-/*
- * __pack instructions are safer, but compiler specific, hence potentially
- * problematic for some compilers.
- *
- * Currently only defined for GCC and ICC.
- */
-#ifdef XXH_OLD_NAMES
-typedef union { xxh_u32 u32; xxh_u64 u64; } __attribute__((packed)) unalign64;
-#endif
-static xxh_u64 XXH_read64(const void* ptr)
-{
- typedef union { xxh_u32 u32; xxh_u64 u64; } __attribute__((packed)) xxh_unalign64;
- return ((const xxh_unalign64*)ptr)->u64;
-}
-
-#else
-
-/*
- * Portable and safe solution. Generally efficient.
- * see: https://stackoverflow.com/a/32095106/646947
- */
-static xxh_u64 XXH_read64(const void* memPtr)
-{
- xxh_u64 val;
- memcpy(&val, memPtr, sizeof(val));
- return val;
-}
-
-#endif /* XXH_FORCE_DIRECT_MEMORY_ACCESS */
-
-#if defined(_MSC_VER) /* Visual Studio */
-# define XXH_swap64 _byteswap_uint64
-#elif XXH_GCC_VERSION >= 403
-# define XXH_swap64 __builtin_bswap64
-#else
-static xxh_u64 XXH_swap64 (xxh_u64 x)
-{
- return ((x << 56) & 0xff00000000000000ULL) |
- ((x << 40) & 0x00ff000000000000ULL) |
- ((x << 24) & 0x0000ff0000000000ULL) |
- ((x << 8) & 0x000000ff00000000ULL) |
- ((x >> 8) & 0x00000000ff000000ULL) |
- ((x >> 24) & 0x0000000000ff0000ULL) |
- ((x >> 40) & 0x000000000000ff00ULL) |
- ((x >> 56) & 0x00000000000000ffULL);
-}
-#endif
-
-
-/* XXH_FORCE_MEMORY_ACCESS==3 is an endian-independent byteshift load. */
-#if (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==3))
-
-XXH_FORCE_INLINE xxh_u64 XXH_readLE64(const void* memPtr)
-{
- const xxh_u8* bytePtr = (const xxh_u8 *)memPtr;
- return bytePtr[0]
- | ((xxh_u64)bytePtr[1] << 8)
- | ((xxh_u64)bytePtr[2] << 16)
- | ((xxh_u64)bytePtr[3] << 24)
- | ((xxh_u64)bytePtr[4] << 32)
- | ((xxh_u64)bytePtr[5] << 40)
- | ((xxh_u64)bytePtr[6] << 48)
- | ((xxh_u64)bytePtr[7] << 56);
-}
-
-XXH_FORCE_INLINE xxh_u64 XXH_readBE64(const void* memPtr)
-{
- const xxh_u8* bytePtr = (const xxh_u8 *)memPtr;
- return bytePtr[7]
- | ((xxh_u64)bytePtr[6] << 8)
- | ((xxh_u64)bytePtr[5] << 16)
- | ((xxh_u64)bytePtr[4] << 24)
- | ((xxh_u64)bytePtr[3] << 32)
- | ((xxh_u64)bytePtr[2] << 40)
- | ((xxh_u64)bytePtr[1] << 48)
- | ((xxh_u64)bytePtr[0] << 56);
-}
-
-#else
-XXH_FORCE_INLINE xxh_u64 XXH_readLE64(const void* ptr)
-{
- return XXH_CPU_LITTLE_ENDIAN ? XXH_read64(ptr) : XXH_swap64(XXH_read64(ptr));
-}
-
-static xxh_u64 XXH_readBE64(const void* ptr)
-{
- return XXH_CPU_LITTLE_ENDIAN ? XXH_swap64(XXH_read64(ptr)) : XXH_read64(ptr);
-}
-#endif
-
-XXH_FORCE_INLINE xxh_u64
-XXH_readLE64_align(const void* ptr, XXH_alignment align)
-{
- if (align==XXH_unaligned)
- return XXH_readLE64(ptr);
- else
- return XXH_CPU_LITTLE_ENDIAN ? *(const xxh_u64*)ptr : XXH_swap64(*(const xxh_u64*)ptr);
-}
-
-
-/******* xxh64 *******/
-
-static const xxh_u64 XXH_PRIME64_1 = 0x9E3779B185EBCA87ULL; /* 0b1001111000110111011110011011000110000101111010111100101010000111 */
-static const xxh_u64 XXH_PRIME64_2 = 0xC2B2AE3D27D4EB4FULL; /* 0b1100001010110010101011100011110100100111110101001110101101001111 */
-static const xxh_u64 XXH_PRIME64_3 = 0x165667B19E3779F9ULL; /* 0b0001011001010110011001111011000110011110001101110111100111111001 */
-static const xxh_u64 XXH_PRIME64_4 = 0x85EBCA77C2B2AE63ULL; /* 0b1000010111101011110010100111011111000010101100101010111001100011 */
-static const xxh_u64 XXH_PRIME64_5 = 0x27D4EB2F165667C5ULL; /* 0b0010011111010100111010110010111100010110010101100110011111000101 */
-
-#ifdef XXH_OLD_NAMES
-# define PRIME64_1 XXH_PRIME64_1
-# define PRIME64_2 XXH_PRIME64_2
-# define PRIME64_3 XXH_PRIME64_3
-# define PRIME64_4 XXH_PRIME64_4
-# define PRIME64_5 XXH_PRIME64_5
-#endif
-
-static xxh_u64 XXH64_round(xxh_u64 acc, xxh_u64 input)
-{
- acc += input * XXH_PRIME64_2;
- acc = XXH_rotl64(acc, 31);
- acc *= XXH_PRIME64_1;
- return acc;
-}
-
-static xxh_u64 XXH64_mergeRound(xxh_u64 acc, xxh_u64 val)
-{
- val = XXH64_round(0, val);
- acc ^= val;
- acc = acc * XXH_PRIME64_1 + XXH_PRIME64_4;
- return acc;
-}
-
-static xxh_u64 XXH64_avalanche(xxh_u64 h64)
-{
- h64 ^= h64 >> 33;
- h64 *= XXH_PRIME64_2;
- h64 ^= h64 >> 29;
- h64 *= XXH_PRIME64_3;
- h64 ^= h64 >> 32;
- return h64;
-}
-
-
-#define XXH_get64bits(p) XXH_readLE64_align(p, align)
-
-static xxh_u64
-XXH64_finalize(xxh_u64 h64, const xxh_u8* ptr, size_t len, XXH_alignment align)
-{
-#define XXH_PROCESS1_64 do { \
- h64 ^= (*ptr++) * XXH_PRIME64_5; \
- h64 = XXH_rotl64(h64, 11) * XXH_PRIME64_1; \
-} while (0)
-
-#define XXH_PROCESS4_64 do { \
- h64 ^= (xxh_u64)(XXH_get32bits(ptr)) * XXH_PRIME64_1; \
- ptr += 4; \
- h64 = XXH_rotl64(h64, 23) * XXH_PRIME64_2 + XXH_PRIME64_3; \
-} while (0)
-
-#define XXH_PROCESS8_64 do { \
- xxh_u64 const k1 = XXH64_round(0, XXH_get64bits(ptr)); \
- ptr += 8; \
- h64 ^= k1; \
- h64 = XXH_rotl64(h64,27) * XXH_PRIME64_1 + XXH_PRIME64_4; \
-} while (0)
-
- /* Rerolled version for 32-bit targets is faster and much smaller. */
- if (XXH_REROLL || XXH_REROLL_XXH64) {
- len &= 31;
- while (len >= 8) {
- XXH_PROCESS8_64;
- len -= 8;
- }
- if (len >= 4) {
- XXH_PROCESS4_64;
- len -= 4;
- }
- while (len > 0) {
- XXH_PROCESS1_64;
- --len;
- }
- return XXH64_avalanche(h64);
- } else {
- switch(len & 31) {
- case 24: XXH_PROCESS8_64;
- /* fallthrough */
- case 16: XXH_PROCESS8_64;
- /* fallthrough */
- case 8: XXH_PROCESS8_64;
- return XXH64_avalanche(h64);
-
- case 28: XXH_PROCESS8_64;
- /* fallthrough */
- case 20: XXH_PROCESS8_64;
- /* fallthrough */
- case 12: XXH_PROCESS8_64;
- /* fallthrough */
- case 4: XXH_PROCESS4_64;
- return XXH64_avalanche(h64);
-
- case 25: XXH_PROCESS8_64;
- /* fallthrough */
- case 17: XXH_PROCESS8_64;
- /* fallthrough */
- case 9: XXH_PROCESS8_64;
- XXH_PROCESS1_64;
- return XXH64_avalanche(h64);
-
- case 29: XXH_PROCESS8_64;
- /* fallthrough */
- case 21: XXH_PROCESS8_64;
- /* fallthrough */
- case 13: XXH_PROCESS8_64;
- /* fallthrough */
- case 5: XXH_PROCESS4_64;
- XXH_PROCESS1_64;
- return XXH64_avalanche(h64);
-
- case 26: XXH_PROCESS8_64;
- /* fallthrough */
- case 18: XXH_PROCESS8_64;
- /* fallthrough */
- case 10: XXH_PROCESS8_64;
- XXH_PROCESS1_64;
- XXH_PROCESS1_64;
- return XXH64_avalanche(h64);
-
- case 30: XXH_PROCESS8_64;
- /* fallthrough */
- case 22: XXH_PROCESS8_64;
- /* fallthrough */
- case 14: XXH_PROCESS8_64;
- /* fallthrough */
- case 6: XXH_PROCESS4_64;
- XXH_PROCESS1_64;
- XXH_PROCESS1_64;
- return XXH64_avalanche(h64);
-
- case 27: XXH_PROCESS8_64;
- /* fallthrough */
- case 19: XXH_PROCESS8_64;
- /* fallthrough */
- case 11: XXH_PROCESS8_64;
- XXH_PROCESS1_64;
- XXH_PROCESS1_64;
- XXH_PROCESS1_64;
- return XXH64_avalanche(h64);
-
- case 31: XXH_PROCESS8_64;
- /* fallthrough */
- case 23: XXH_PROCESS8_64;
- /* fallthrough */
- case 15: XXH_PROCESS8_64;
- /* fallthrough */
- case 7: XXH_PROCESS4_64;
- /* fallthrough */
- case 3: XXH_PROCESS1_64;
- /* fallthrough */
- case 2: XXH_PROCESS1_64;
- /* fallthrough */
- case 1: XXH_PROCESS1_64;
- /* fallthrough */
- case 0: return XXH64_avalanche(h64);
- }
- }
- /* impossible to reach */
- XXH_ASSERT(0);
- return 0; /* unreachable, but some compilers complain without it */
-}
-
-#ifdef XXH_OLD_NAMES
-# define PROCESS1_64 XXH_PROCESS1_64
-# define PROCESS4_64 XXH_PROCESS4_64
-# define PROCESS8_64 XXH_PROCESS8_64
-#else
-# undef XXH_PROCESS1_64
-# undef XXH_PROCESS4_64
-# undef XXH_PROCESS8_64
-#endif
-
-XXH_FORCE_INLINE xxh_u64
-XXH64_endian_align(const xxh_u8* input, size_t len, xxh_u64 seed, XXH_alignment align)
-{
- const xxh_u8* bEnd = input + len;
- xxh_u64 h64;
-
-#if defined(XXH_ACCEPT_NULL_INPUT_POINTER) && (XXH_ACCEPT_NULL_INPUT_POINTER>=1)
- if (input==NULL) {
- len=0;
- bEnd=input=(const xxh_u8*)(size_t)32;
- }
-#endif
-
- if (len>=32) {
- const xxh_u8* const limit = bEnd - 32;
- xxh_u64 v1 = seed + XXH_PRIME64_1 + XXH_PRIME64_2;
- xxh_u64 v2 = seed + XXH_PRIME64_2;
- xxh_u64 v3 = seed + 0;
- xxh_u64 v4 = seed - XXH_PRIME64_1;
-
- do {
- v1 = XXH64_round(v1, XXH_get64bits(input)); input+=8;
- v2 = XXH64_round(v2, XXH_get64bits(input)); input+=8;
- v3 = XXH64_round(v3, XXH_get64bits(input)); input+=8;
- v4 = XXH64_round(v4, XXH_get64bits(input)); input+=8;
- } while (input<=limit);
-
- h64 = XXH_rotl64(v1, 1) + XXH_rotl64(v2, 7) + XXH_rotl64(v3, 12) + XXH_rotl64(v4, 18);
- h64 = XXH64_mergeRound(h64, v1);
- h64 = XXH64_mergeRound(h64, v2);
- h64 = XXH64_mergeRound(h64, v3);
- h64 = XXH64_mergeRound(h64, v4);
-
- } else {
- h64 = seed + XXH_PRIME64_5;
- }
-
- h64 += (xxh_u64) len;
-
- return XXH64_finalize(h64, input, len, align);
-}
-
-
-XXH_PUBLIC_API XXH64_hash_t XXH64 (const void* input, size_t len, XXH64_hash_t seed)
-{
-#if 0
- /* Simple version, good for code maintenance, but unfortunately slow for small inputs */
- XXH64_state_t state;
- XXH64_reset(&state, seed);
- XXH64_update(&state, (const xxh_u8*)input, len);
- return XXH64_digest(&state);
-
-#else
-
- if (XXH_FORCE_ALIGN_CHECK) {
- if ((((size_t)input) & 7)==0) { /* Input is aligned, let's leverage the speed advantage */
- return XXH64_endian_align((const xxh_u8*)input, len, seed, XXH_aligned);
- } }
-
- return XXH64_endian_align((const xxh_u8*)input, len, seed, XXH_unaligned);
-
-#endif
-}
-
-/******* Hash Streaming *******/
-
-XXH_PUBLIC_API XXH64_state_t* XXH64_createState(void)
-{
- return (XXH64_state_t*)XXH_malloc(sizeof(XXH64_state_t));
-}
-XXH_PUBLIC_API XXH_errorcode XXH64_freeState(XXH64_state_t* statePtr)
-{
- XXH_free(statePtr);
- return XXH_OK;
-}
-
-XXH_PUBLIC_API void XXH64_copyState(XXH64_state_t* dstState, const XXH64_state_t* srcState)
-{
- memcpy(dstState, srcState, sizeof(*dstState));
-}
-
-XXH_PUBLIC_API XXH_errorcode XXH64_reset(XXH64_state_t* statePtr, XXH64_hash_t seed)
-{
- XXH64_state_t state; /* use a local state to memcpy() in order to avoid strict-aliasing warnings */
- memset(&state, 0, sizeof(state));
- state.v1 = seed + XXH_PRIME64_1 + XXH_PRIME64_2;
- state.v2 = seed + XXH_PRIME64_2;
- state.v3 = seed + 0;
- state.v4 = seed - XXH_PRIME64_1;
- /* do not write into reserved64, might be removed in a future version */
- memcpy(statePtr, &state, sizeof(state) - sizeof(state.reserved64));
- return XXH_OK;
-}
-
-XXH_PUBLIC_API XXH_errorcode
-XXH64_update (XXH64_state_t* state, const void* input, size_t len)
-{
- if (input==NULL)
-#if defined(XXH_ACCEPT_NULL_INPUT_POINTER) && (XXH_ACCEPT_NULL_INPUT_POINTER>=1)
- return XXH_OK;
-#else
- return XXH_ERROR;
-#endif
-
- { const xxh_u8* p = (const xxh_u8*)input;
- const xxh_u8* const bEnd = p + len;
-
- state->total_len += len;
-
- if (state->memsize + len < 32) { /* fill in tmp buffer */
- XXH_memcpy(((xxh_u8*)state->mem64) + state->memsize, input, len);
- state->memsize += (xxh_u32)len;
- return XXH_OK;
- }
-
- if (state->memsize) { /* tmp buffer is full */
- XXH_memcpy(((xxh_u8*)state->mem64) + state->memsize, input, 32-state->memsize);
- state->v1 = XXH64_round(state->v1, XXH_readLE64(state->mem64+0));
- state->v2 = XXH64_round(state->v2, XXH_readLE64(state->mem64+1));
- state->v3 = XXH64_round(state->v3, XXH_readLE64(state->mem64+2));
- state->v4 = XXH64_round(state->v4, XXH_readLE64(state->mem64+3));
- p += 32-state->memsize;
- state->memsize = 0;
- }
-
- if (p+32 <= bEnd) {
- const xxh_u8* const limit = bEnd - 32;
- xxh_u64 v1 = state->v1;
- xxh_u64 v2 = state->v2;
- xxh_u64 v3 = state->v3;
- xxh_u64 v4 = state->v4;
-
- do {
- v1 = XXH64_round(v1, XXH_readLE64(p)); p+=8;
- v2 = XXH64_round(v2, XXH_readLE64(p)); p+=8;
- v3 = XXH64_round(v3, XXH_readLE64(p)); p+=8;
- v4 = XXH64_round(v4, XXH_readLE64(p)); p+=8;
- } while (p<=limit);
-
- state->v1 = v1;
- state->v2 = v2;
- state->v3 = v3;
- state->v4 = v4;
- }
-
- if (p < bEnd) {
- XXH_memcpy(state->mem64, p, (size_t)(bEnd-p));
- state->memsize = (unsigned)(bEnd-p);
- }
- }
-
- return XXH_OK;
-}
-
-
-XXH_PUBLIC_API XXH64_hash_t XXH64_digest (const XXH64_state_t* state)
-{
- xxh_u64 h64;
-
- if (state->total_len >= 32) {
- xxh_u64 const v1 = state->v1;
- xxh_u64 const v2 = state->v2;
- xxh_u64 const v3 = state->v3;
- xxh_u64 const v4 = state->v4;
-
- h64 = XXH_rotl64(v1, 1) + XXH_rotl64(v2, 7) + XXH_rotl64(v3, 12) + XXH_rotl64(v4, 18);
- h64 = XXH64_mergeRound(h64, v1);
- h64 = XXH64_mergeRound(h64, v2);
- h64 = XXH64_mergeRound(h64, v3);
- h64 = XXH64_mergeRound(h64, v4);
- } else {
- h64 = state->v3 /*seed*/ + XXH_PRIME64_5;
- }
-
- h64 += (xxh_u64) state->total_len;
-
- return XXH64_finalize(h64, (const xxh_u8*)state->mem64, (size_t)state->total_len, XXH_aligned);
-}
-
-
-/******* Canonical representation *******/
-
-XXH_PUBLIC_API void XXH64_canonicalFromHash(XXH64_canonical_t* dst, XXH64_hash_t hash)
-{
- XXH_STATIC_ASSERT(sizeof(XXH64_canonical_t) == sizeof(XXH64_hash_t));
- if (XXH_CPU_LITTLE_ENDIAN) hash = XXH_swap64(hash);
- memcpy(dst, &hash, sizeof(*dst));
-}
-
-XXH_PUBLIC_API XXH64_hash_t XXH64_hashFromCanonical(const XXH64_canonical_t* src)
-{
- return XXH_readBE64(src);
-}
-
-
-
-/* *********************************************************************
-* XXH3
-* New generation hash designed for speed on small keys and vectorization
-************************************************************************ */
-
-/* === Compiler specifics === */
-
-#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* >= C99 */
-# define XXH_RESTRICT restrict
-#else
-/* Note: it might be useful to define __restrict or __restrict__ for some C++ compilers */
-# define XXH_RESTRICT /* disable */
-#endif
-
-#if (defined(__GNUC__) && (__GNUC__ >= 3)) \
- || (defined(__INTEL_COMPILER) && (__INTEL_COMPILER >= 800)) \
- || defined(__clang__)
-# define XXH_likely(x) __builtin_expect(x, 1)
-# define XXH_unlikely(x) __builtin_expect(x, 0)
-#else
-# define XXH_likely(x) (x)
-# define XXH_unlikely(x) (x)
-#endif
-
-#if defined(__GNUC__)
-# if defined(__AVX2__)
-# include <immintrin.h>
-# elif defined(__SSE2__)
-# include <emmintrin.h>
-# elif defined(__ARM_NEON__) || defined(__ARM_NEON)
-# define inline __inline__ /* circumvent a clang bug */
-# include <arm_neon.h>
-# undef inline
-# endif
-#elif defined(_MSC_VER)
-# include <intrin.h>
-#endif
-
-/*
- * One goal of XXH3 is to make it fast on both 32-bit and 64-bit, while
- * remaining a true 64-bit/128-bit hash function.
- *
- * This is done by prioritizing a subset of 64-bit operations that can be
- * emulated without too many steps on the average 32-bit machine.
- *
- * For example, these two lines seem similar, and run equally fast on 64-bit:
- *
- * xxh_u64 x;
- * x ^= (x >> 47); // good
- * x ^= (x >> 13); // bad
- *
- * However, to a 32-bit machine, there is a major difference.
- *
- * x ^= (x >> 47) looks like this:
- *
- * x.lo ^= (x.hi >> (47 - 32));
- *
- * while x ^= (x >> 13) looks like this:
- *
- * // note: funnel shifts are not usually cheap.
- * x.lo ^= (x.lo >> 13) | (x.hi << (32 - 13));
- * x.hi ^= (x.hi >> 13);
- *
- * The first one is significantly faster than the second, simply because the
- * shift is larger than 32. This means:
- * - All the bits we need are in the upper 32 bits, so we can ignore the lower
- * 32 bits in the shift.
- * - The shift result will always fit in the lower 32 bits, and therefore,
- * we can ignore the upper 32 bits in the xor.
- *
- * Thanks to this optimization, XXH3 only requires these features to be efficient:
- *
- * - Usable unaligned access
- * - A 32-bit or 64-bit ALU
- * - If 32-bit, a decent ADC instruction
- * - A 32 or 64-bit multiply with a 64-bit result
- * - For the 128-bit variant, a decent byteswap helps short inputs.
- *
- * The first two are already required by XXH32, and almost all 32-bit and 64-bit
- * platforms which can run XXH32 can run XXH3 efficiently.
- *
- * Thumb-1, the classic 16-bit only subset of ARM's instruction set, is one
- * notable exception.
- *
- * First of all, Thumb-1 lacks support for the UMULL instruction which
- * performs the important long multiply. This means numerous __aeabi_lmul
- * calls.
- *
- * Second of all, the 8 functional registers are just not enough.
- * Setup for __aeabi_lmul, byteshift loads, pointers, and all arithmetic need
- * Lo registers, and this shuffling results in thousands more MOVs than A32.
- *
- * A32 and T32 don't have this limitation. They can access all 14 registers,
- * do a 32->64 multiply with UMULL, and the flexible operand allowing free
- * shifts is helpful, too.
- *
- * Therefore, we do a quick sanity check.
- *
- * If compiling Thumb-1 for a target which supports ARM instructions, we will
- * emit a warning, as it is not a "sane" platform to compile for.
- *
- * Usually, if this happens, it is because of an accident and you probably need
- * to specify -march, as you likely meant to compile for a newer architecture.
- *
- * Credit: large sections of the vectorial and asm source code paths
- * have been contributed by @easyaspi314
- */
-#if defined(__thumb__) && !defined(__thumb2__) && defined(__ARM_ARCH_ISA_ARM)
-# warning "XXH3 is highly inefficient without ARM or Thumb-2."
-#endif
-
-/* ==========================================
- * Vectorization detection
- * ========================================== */
-#define XXH_SCALAR 0 /* Portable scalar version */
-#define XXH_SSE2 1 /* SSE2 for Pentium 4 and all x86_64 */
-#define XXH_AVX2 2 /* AVX2 for Haswell and Bulldozer */
-#define XXH_AVX512 3 /* AVX512 for Skylake and Icelake */
-#define XXH_NEON 4 /* NEON for most ARMv7-A and all AArch64 */
-#define XXH_VSX 5 /* VSX and ZVector for POWER8/z13 */
-
-#ifndef XXH_VECTOR /* can be defined on command line */
-# if defined(__AVX512F__)
-# define XXH_VECTOR XXH_AVX512
-# elif defined(__AVX2__)
-# define XXH_VECTOR XXH_AVX2
-# elif defined(__SSE2__) || defined(_M_AMD64) || defined(_M_X64) || (defined(_M_IX86_FP) && (_M_IX86_FP == 2))
-# define XXH_VECTOR XXH_SSE2
-# elif defined(__GNUC__) /* msvc support maybe later */ \
- && (defined(__ARM_NEON__) || defined(__ARM_NEON)) \
- && (defined(__LITTLE_ENDIAN__) /* We only support little endian NEON */ \
- || (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__))
-# define XXH_VECTOR XXH_NEON
-# elif (defined(__PPC64__) && defined(__POWER8_VECTOR__)) \
- || (defined(__s390x__) && defined(__VEC__)) \
- && defined(__GNUC__) /* TODO: IBM XL */
-# define XXH_VECTOR XXH_VSX
-# else
-# define XXH_VECTOR XXH_SCALAR
-# endif
-#endif
-
-/*
- * Controls the alignment of the accumulator,
- * for compatibility with aligned vector loads, which are usually faster.
- */
-#ifndef XXH_ACC_ALIGN
-# if defined(XXH_X86DISPATCH)
-# define XXH_ACC_ALIGN 64 /* for compatibility with avx512 */
-# elif XXH_VECTOR == XXH_SCALAR /* scalar */
-# define XXH_ACC_ALIGN 8
-# elif XXH_VECTOR == XXH_SSE2 /* sse2 */
-# define XXH_ACC_ALIGN 16
-# elif XXH_VECTOR == XXH_AVX2 /* avx2 */
-# define XXH_ACC_ALIGN 32
-# elif XXH_VECTOR == XXH_NEON /* neon */
-# define XXH_ACC_ALIGN 16
-# elif XXH_VECTOR == XXH_VSX /* vsx */
-# define XXH_ACC_ALIGN 16
-# elif XXH_VECTOR == XXH_AVX512 /* avx512 */
-# define XXH_ACC_ALIGN 64
-# endif
-#endif
-
-#if defined(XXH_X86DISPATCH) || XXH_VECTOR == XXH_SSE2 \
- || XXH_VECTOR == XXH_AVX2 || XXH_VECTOR == XXH_AVX512
-# define XXH_SEC_ALIGN XXH_ACC_ALIGN
-#else
-# define XXH_SEC_ALIGN 8
-#endif
-
-/*
- * UGLY HACK:
- * GCC usually generates the best code with -O3 for xxHash.
- *
- * However, when targeting AVX2, it is overzealous in its unrolling resulting
- * in code roughly 3/4 the speed of Clang.
- *
- * There are other issues, such as GCC splitting _mm256_loadu_si256 into
- * _mm_loadu_si128 + _mm256_inserti128_si256. This is an optimization which
- * only applies to Sandy and Ivy Bridge... which don't even support AVX2.
- *
- * That is why when compiling the AVX2 version, it is recommended to use either
- * -O2 -mavx2 -march=haswell
- * or
- * -O2 -mavx2 -mno-avx256-split-unaligned-load
- * for decent performance, or to use Clang instead.
- *
- * Fortunately, we can control the first one with a pragma that forces GCC into
- * -O2, but the other one we can't control without "failed to inline always
- * inline function due to target mismatch" warnings.
- */
-#if XXH_VECTOR == XXH_AVX2 /* AVX2 */ \
- && defined(__GNUC__) && !defined(__clang__) /* GCC, not Clang */ \
- && defined(__OPTIMIZE__) && !defined(__OPTIMIZE_SIZE__) /* respect -O0 and -Os */
-# pragma GCC push_options
-# pragma GCC optimize("-O2")
-#endif
-
-
-#if XXH_VECTOR == XXH_NEON
-/*
- * NEON's setup for vmlal_u32 is a little more complicated than it is on
- * SSE2, AVX2, and VSX.
- *
- * While PMULUDQ and VMULEUW both perform a mask, VMLAL.U32 performs an upcast.
- *
- * To do the same operation, the 128-bit 'Q' register needs to be split into
- * two 64-bit 'D' registers, performing this operation::
- *
- * [ a | b ]
- * | '---------. .--------' |
- * | x |
- * | .---------' '--------. |
- * [ a & 0xFFFFFFFF | b & 0xFFFFFFFF ],[ a >> 32 | b >> 32 ]
- *
- * Due to significant changes in aarch64, the fastest method for aarch64 is
- * completely different than the fastest method for ARMv7-A.
- *
- * ARMv7-A treats D registers as unions overlaying Q registers, so modifying
- * D11 will modify the high half of Q5. This is similar to how modifying AH
- * will only affect bits 8-15 of AX on x86.
- *
- * VZIP takes two registers, and puts even lanes in one register and odd lanes
- * in the other.
- *
- * On ARMv7-A, this strangely modifies both parameters in place instead of
- * taking the usual 3-operand form.
- *
- * Therefore, if we want to do this, we can simply use a D-form VZIP.32 on the
- * lower and upper halves of the Q register to end up with the high and low
- * halves where we want - all in one instruction.
- *
- * vzip.32 d10, d11 @ d10 = { d10[0], d11[0] }; d11 = { d10[1], d11[1] }
- *
- * Unfortunately we need inline assembly for this: Instructions modifying two
- * registers at once is not possible in GCC or Clang's IR, and they have to
- * create a copy.
- *
- * aarch64 requires a different approach.
- *
- * In order to make it easier to write a decent compiler for aarch64, many
- * quirks were removed, such as conditional execution.
- *
- * NEON was also affected by this.
- *
- * aarch64 cannot access the high bits of a Q-form register, and writes to a
- * D-form register zero the high bits, similar to how writes to W-form scalar
- * registers (or DWORD registers on x86_64) work.
- *
- * The formerly free vget_high intrinsics now require a vext (with a few
- * exceptions)
- *
- * Additionally, VZIP was replaced by ZIP1 and ZIP2, which are the equivalent
- * of PUNPCKL* and PUNPCKH* in SSE, respectively, in order to only modify one
- * operand.
- *
- * The equivalent of the VZIP.32 on the lower and upper halves would be this
- * mess:
- *
- * ext v2.4s, v0.4s, v0.4s, #2 // v2 = { v0[2], v0[3], v0[0], v0[1] }
- * zip1 v1.2s, v0.2s, v2.2s // v1 = { v0[0], v2[0] }
- * zip2 v0.2s, v0.2s, v1.2s // v0 = { v0[1], v2[1] }
- *
- * Instead, we use a literal downcast, vmovn_u64 (XTN), and vshrn_n_u64 (SHRN):
- *
- * shrn v1.2s, v0.2d, #32 // v1 = (uint32x2_t)(v0 >> 32);
- * xtn v0.2s, v0.2d // v0 = (uint32x2_t)(v0 & 0xFFFFFFFF);
- *
- * This is available on ARMv7-A, but is less efficient than a single VZIP.32.
- */
-
-/*
- * Function-like macro:
- * void XXH_SPLIT_IN_PLACE(uint64x2_t &in, uint32x2_t &outLo, uint32x2_t &outHi)
- * {
- * outLo = (uint32x2_t)(in & 0xFFFFFFFF);
- * outHi = (uint32x2_t)(in >> 32);
- * in = UNDEFINED;
- * }
- */
-# if !defined(XXH_NO_VZIP_HACK) /* define to disable */ \
- && defined(__GNUC__) \
- && !defined(__aarch64__) && !defined(__arm64__)
-# define XXH_SPLIT_IN_PLACE(in, outLo, outHi) \
- do { \
- /* Undocumented GCC/Clang operand modifier: %e0 = lower D half, %f0 = upper D half */ \
- /* https://github.com/gcc-mirror/gcc/blob/38cf91e5/gcc/config/arm/arm.c#L22486 */ \
- /* https://github.com/llvm-mirror/llvm/blob/2c4ca683/lib/Target/ARM/ARMAsmPrinter.cpp#L399 */ \
- __asm__("vzip.32 %e0, %f0" : "+w" (in)); \
- (outLo) = vget_low_u32 (vreinterpretq_u32_u64(in)); \
- (outHi) = vget_high_u32(vreinterpretq_u32_u64(in)); \
- } while (0)
-# else
-# define XXH_SPLIT_IN_PLACE(in, outLo, outHi) \
- do { \
- (outLo) = vmovn_u64 (in); \
- (outHi) = vshrn_n_u64 ((in), 32); \
- } while (0)
-# endif
-#endif /* XXH_VECTOR == XXH_NEON */
-
-/*
- * VSX and Z Vector helpers.
- *
- * This is very messy, and any pull requests to clean this up are welcome.
- *
- * There are a lot of problems with supporting VSX and s390x, due to
- * inconsistent intrinsics, spotty coverage, and multiple endiannesses.
- */
-#if XXH_VECTOR == XXH_VSX
-# if defined(__s390x__)
-# include <s390intrin.h>
-# else
-/* gcc's altivec.h can have the unwanted consequence to unconditionally
- * #define bool, vector, and pixel keywords,
- * with bad consequences for programs already using these keywords for other purposes.
- * The paragraph defining these macros is skipped when __APPLE_ALTIVEC__ is defined.
- * __APPLE_ALTIVEC__ is _generally_ defined automatically by the compiler,
- * but it seems that, in some cases, it isn't.
- * Force the build macro to be defined, so that keywords are not altered.
- */
-# if defined(__GNUC__) && !defined(__APPLE_ALTIVEC__)
-# define __APPLE_ALTIVEC__
-# endif
-# include <altivec.h>
-# endif
-
-typedef __vector unsigned long long xxh_u64x2;
-typedef __vector unsigned char xxh_u8x16;
-typedef __vector unsigned xxh_u32x4;
-
-# ifndef XXH_VSX_BE
-# if defined(__BIG_ENDIAN__) \
- || (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
-# define XXH_VSX_BE 1
-# elif defined(__VEC_ELEMENT_REG_ORDER__) && __VEC_ELEMENT_REG_ORDER__ == __ORDER_BIG_ENDIAN__
-# warning "-maltivec=be is not recommended. Please use native endianness."
-# define XXH_VSX_BE 1
-# else
-# define XXH_VSX_BE 0
-# endif
-# endif /* !defined(XXH_VSX_BE) */
-
-# if XXH_VSX_BE
-/* A wrapper for POWER9's vec_revb. */
-# if defined(__POWER9_VECTOR__) || (defined(__clang__) && defined(__s390x__))
-# define XXH_vec_revb vec_revb
-# else
-XXH_FORCE_INLINE xxh_u64x2 XXH_vec_revb(xxh_u64x2 val)
-{
- xxh_u8x16 const vByteSwap = { 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00,
- 0x0F, 0x0E, 0x0D, 0x0C, 0x0B, 0x0A, 0x09, 0x08 };
- return vec_perm(val, val, vByteSwap);
-}
-# endif
-# endif /* XXH_VSX_BE */
-
-/*
- * Performs an unaligned load and byte swaps it on big endian.
- */
-XXH_FORCE_INLINE xxh_u64x2 XXH_vec_loadu(const void *ptr)
-{
- xxh_u64x2 ret;
- memcpy(&ret, ptr, sizeof(xxh_u64x2));
-# if XXH_VSX_BE
- ret = XXH_vec_revb(ret);
-# endif
- return ret;
-}
-
-/*
- * vec_mulo and vec_mule are very problematic intrinsics on PowerPC
- *
- * These intrinsics weren't added until GCC 8, despite existing for a while,
- * and they are endian dependent. Also, their meaning swap depending on version.
- * */
-# if defined(__s390x__)
- /* s390x is always big endian, no issue on this platform */
-# define XXH_vec_mulo vec_mulo
-# define XXH_vec_mule vec_mule
-# elif defined(__clang__) && XXH_HAS_BUILTIN(__builtin_altivec_vmuleuw)
-/* Clang has a better way to control this, we can just use the builtin which doesn't swap. */
-# define XXH_vec_mulo __builtin_altivec_vmulouw
-# define XXH_vec_mule __builtin_altivec_vmuleuw
-# else
-/* gcc needs inline assembly */
-/* Adapted from https://github.com/google/highwayhash/blob/master/highwayhash/hh_vsx.h. */
-XXH_FORCE_INLINE xxh_u64x2 XXH_vec_mulo(xxh_u32x4 a, xxh_u32x4 b)
-{
- xxh_u64x2 result;
- __asm__("vmulouw %0, %1, %2" : "=v" (result) : "v" (a), "v" (b));
- return result;
-}
-XXH_FORCE_INLINE xxh_u64x2 XXH_vec_mule(xxh_u32x4 a, xxh_u32x4 b)
-{
- xxh_u64x2 result;
- __asm__("vmuleuw %0, %1, %2" : "=v" (result) : "v" (a), "v" (b));
- return result;
-}
-# endif /* XXH_vec_mulo, XXH_vec_mule */
-#endif /* XXH_VECTOR == XXH_VSX */
-
-
-/* prefetch
- * can be disabled, by declaring XXH_NO_PREFETCH build macro */
-#if defined(XXH_NO_PREFETCH)
-# define XXH_PREFETCH(ptr) (void)(ptr) /* disabled */
-#else
-# if defined(_MSC_VER) && (defined(_M_X64) || defined(_M_I86)) /* _mm_prefetch() is not defined outside of x86/x64 */
-# include <mmintrin.h> /* https://msdn.microsoft.com/fr-fr/library/84szxsww(v=vs.90).aspx */
-# define XXH_PREFETCH(ptr) _mm_prefetch((const char*)(ptr), _MM_HINT_T0)
-# elif defined(__GNUC__) && ( (__GNUC__ >= 4) || ( (__GNUC__ == 3) && (__GNUC_MINOR__ >= 1) ) )
-# define XXH_PREFETCH(ptr) __builtin_prefetch((ptr), 0 /* rw==read */, 3 /* locality */)
-# else
-# define XXH_PREFETCH(ptr) (void)(ptr) /* disabled */
-# endif
-#endif /* XXH_NO_PREFETCH */
-
-
-/* ==========================================
- * XXH3 default settings
- * ========================================== */
-
-#define XXH_SECRET_DEFAULT_SIZE 192 /* minimum XXH3_SECRET_SIZE_MIN */
-
-#if (XXH_SECRET_DEFAULT_SIZE < XXH3_SECRET_SIZE_MIN)
-# error "default keyset is not large enough"
-#endif
-
-/* Pseudorandom secret taken directly from FARSH */
-XXH_ALIGN(64) static const xxh_u8 XXH3_kSecret[XXH_SECRET_DEFAULT_SIZE] = {
- 0xb8, 0xfe, 0x6c, 0x39, 0x23, 0xa4, 0x4b, 0xbe, 0x7c, 0x01, 0x81, 0x2c, 0xf7, 0x21, 0xad, 0x1c,
- 0xde, 0xd4, 0x6d, 0xe9, 0x83, 0x90, 0x97, 0xdb, 0x72, 0x40, 0xa4, 0xa4, 0xb7, 0xb3, 0x67, 0x1f,
- 0xcb, 0x79, 0xe6, 0x4e, 0xcc, 0xc0, 0xe5, 0x78, 0x82, 0x5a, 0xd0, 0x7d, 0xcc, 0xff, 0x72, 0x21,
- 0xb8, 0x08, 0x46, 0x74, 0xf7, 0x43, 0x24, 0x8e, 0xe0, 0x35, 0x90, 0xe6, 0x81, 0x3a, 0x26, 0x4c,
- 0x3c, 0x28, 0x52, 0xbb, 0x91, 0xc3, 0x00, 0xcb, 0x88, 0xd0, 0x65, 0x8b, 0x1b, 0x53, 0x2e, 0xa3,
- 0x71, 0x64, 0x48, 0x97, 0xa2, 0x0d, 0xf9, 0x4e, 0x38, 0x19, 0xef, 0x46, 0xa9, 0xde, 0xac, 0xd8,
- 0xa8, 0xfa, 0x76, 0x3f, 0xe3, 0x9c, 0x34, 0x3f, 0xf9, 0xdc, 0xbb, 0xc7, 0xc7, 0x0b, 0x4f, 0x1d,
- 0x8a, 0x51, 0xe0, 0x4b, 0xcd, 0xb4, 0x59, 0x31, 0xc8, 0x9f, 0x7e, 0xc9, 0xd9, 0x78, 0x73, 0x64,
- 0xea, 0xc5, 0xac, 0x83, 0x34, 0xd3, 0xeb, 0xc3, 0xc5, 0x81, 0xa0, 0xff, 0xfa, 0x13, 0x63, 0xeb,
- 0x17, 0x0d, 0xdd, 0x51, 0xb7, 0xf0, 0xda, 0x49, 0xd3, 0x16, 0x55, 0x26, 0x29, 0xd4, 0x68, 0x9e,
- 0x2b, 0x16, 0xbe, 0x58, 0x7d, 0x47, 0xa1, 0xfc, 0x8f, 0xf8, 0xb8, 0xd1, 0x7a, 0xd0, 0x31, 0xce,
- 0x45, 0xcb, 0x3a, 0x8f, 0x95, 0x16, 0x04, 0x28, 0xaf, 0xd7, 0xfb, 0xca, 0xbb, 0x4b, 0x40, 0x7e,
-};
-
-
-#ifdef XXH_OLD_NAMES
-# define kSecret XXH3_kSecret
-#endif
-
-/*
- * Calculates a 32-bit to 64-bit long multiply.
- *
- * Wraps __emulu on MSVC x86 because it tends to call __allmul when it doesn't
- * need to (but it shouldn't need to anyways, it is about 7 instructions to do
- * a 64x64 multiply...). Since we know that this will _always_ emit MULL, we
- * use that instead of the normal method.
- *
- * If you are compiling for platforms like Thumb-1 and don't have a better option,
- * you may also want to write your own long multiply routine here.
- *
- * XXH_FORCE_INLINE xxh_u64 XXH_mult32to64(xxh_u64 x, xxh_u64 y)
- * {
- * return (x & 0xFFFFFFFF) * (y & 0xFFFFFFFF);
- * }
- */
-#if defined(_MSC_VER) && defined(_M_IX86)
-# include <intrin.h>
-# define XXH_mult32to64(x, y) __emulu((unsigned)(x), (unsigned)(y))
-#else
-/*
- * Downcast + upcast is usually better than masking on older compilers like
- * GCC 4.2 (especially 32-bit ones), all without affecting newer compilers.
- *
- * The other method, (x & 0xFFFFFFFF) * (y & 0xFFFFFFFF), will AND both operands
- * and perform a full 64x64 multiply -- entirely redundant on 32-bit.
- */
-# define XXH_mult32to64(x, y) ((xxh_u64)(xxh_u32)(x) * (xxh_u64)(xxh_u32)(y))
-#endif
-
-/*
- * Calculates a 64->128-bit long multiply.
- *
- * Uses __uint128_t and _umul128 if available, otherwise uses a scalar version.
- */
-static XXH128_hash_t
-XXH_mult64to128(xxh_u64 lhs, xxh_u64 rhs)
-{
- /*
- * GCC/Clang __uint128_t method.
- *
- * On most 64-bit targets, GCC and Clang define a __uint128_t type.
- * This is usually the best way as it usually uses a native long 64-bit
- * multiply, such as MULQ on x86_64 or MUL + UMULH on aarch64.
- *
- * Usually.
- *
- * Despite being a 32-bit platform, Clang (and emscripten) define this type
- * despite not having the arithmetic for it. This results in a laggy
- * compiler builtin call which calculates a full 128-bit multiply.
- * In that case it is best to use the portable one.
- * https://github.com/Cyan4973/xxHash/issues/211#issuecomment-515575677
- */
-#if defined(__GNUC__) && !defined(__wasm__) \
- && defined(__SIZEOF_INT128__) \
- || (defined(_INTEGRAL_MAX_BITS) && _INTEGRAL_MAX_BITS >= 128)
-
- __uint128_t const product = (__uint128_t)lhs * (__uint128_t)rhs;
- XXH128_hash_t r128;
- r128.low64 = (xxh_u64)(product);
- r128.high64 = (xxh_u64)(product >> 64);
- return r128;
-
- /*
- * MSVC for x64's _umul128 method.
- *
- * xxh_u64 _umul128(xxh_u64 Multiplier, xxh_u64 Multiplicand, xxh_u64 *HighProduct);
- *
- * This compiles to single operand MUL on x64.
- */
-#elif defined(_M_X64) || defined(_M_IA64)
-
-#ifndef _MSC_VER
-# pragma intrinsic(_umul128)
-#endif
- xxh_u64 product_high;
- xxh_u64 const product_low = _umul128(lhs, rhs, &product_high);
- XXH128_hash_t r128;
- r128.low64 = product_low;
- r128.high64 = product_high;
- return r128;
-
-#else
- /*
- * Portable scalar method. Optimized for 32-bit and 64-bit ALUs.
- *
- * This is a fast and simple grade school multiply, which is shown below
- * with base 10 arithmetic instead of base 0x100000000.
- *
- * 9 3 // D2 lhs = 93
- * x 7 5 // D2 rhs = 75
- * ----------
- * 1 5 // D2 lo_lo = (93 % 10) * (75 % 10) = 15
- * 4 5 | // D2 hi_lo = (93 / 10) * (75 % 10) = 45
- * 2 1 | // D2 lo_hi = (93 % 10) * (75 / 10) = 21
- * + 6 3 | | // D2 hi_hi = (93 / 10) * (75 / 10) = 63
- * ---------
- * 2 7 | // D2 cross = (15 / 10) + (45 % 10) + 21 = 27
- * + 6 7 | | // D2 upper = (27 / 10) + (45 / 10) + 63 = 67
- * ---------
- * 6 9 7 5 // D4 res = (27 * 10) + (15 % 10) + (67 * 100) = 6975
- *
- * The reasons for adding the products like this are:
- * 1. It avoids manual carry tracking. Just like how
- * (9 * 9) + 9 + 9 = 99, the same applies with this for UINT64_MAX.
- * This avoids a lot of complexity.
- *
- * 2. It hints for, and on Clang, compiles to, the powerful UMAAL
- * instruction available in ARM's Digital Signal Processing extension
- * in 32-bit ARMv6 and later, which is shown below:
- *
- * void UMAAL(xxh_u32 *RdLo, xxh_u32 *RdHi, xxh_u32 Rn, xxh_u32 Rm)
- * {
- * xxh_u64 product = (xxh_u64)*RdLo * (xxh_u64)*RdHi + Rn + Rm;
- * *RdLo = (xxh_u32)(product & 0xFFFFFFFF);
- * *RdHi = (xxh_u32)(product >> 32);
- * }
- *
- * This instruction was designed for efficient long multiplication, and
- * allows this to be calculated in only 4 instructions at speeds
- * comparable to some 64-bit ALUs.
- *
- * 3. It isn't terrible on other platforms. Usually this will be a couple
- * of 32-bit ADD/ADCs.
- */
-
- /* First calculate all of the cross products. */
- xxh_u64 const lo_lo = XXH_mult32to64(lhs & 0xFFFFFFFF, rhs & 0xFFFFFFFF);
- xxh_u64 const hi_lo = XXH_mult32to64(lhs >> 32, rhs & 0xFFFFFFFF);
- xxh_u64 const lo_hi = XXH_mult32to64(lhs & 0xFFFFFFFF, rhs >> 32);
- xxh_u64 const hi_hi = XXH_mult32to64(lhs >> 32, rhs >> 32);
-
- /* Now add the products together. These will never overflow. */
- xxh_u64 const cross = (lo_lo >> 32) + (hi_lo & 0xFFFFFFFF) + lo_hi;
- xxh_u64 const upper = (hi_lo >> 32) + (cross >> 32) + hi_hi;
- xxh_u64 const lower = (cross << 32) | (lo_lo & 0xFFFFFFFF);
-
- XXH128_hash_t r128;
- r128.low64 = lower;
- r128.high64 = upper;
- return r128;
-#endif
-}
-
-/*
- * Does a 64-bit to 128-bit multiply, then XOR folds it.
- *
- * The reason for the separate function is to prevent passing too many structs
- * around by value. This will hopefully inline the multiply, but we don't force it.
- */
-static xxh_u64
-XXH3_mul128_fold64(xxh_u64 lhs, xxh_u64 rhs)
-{
- XXH128_hash_t product = XXH_mult64to128(lhs, rhs);
- return product.low64 ^ product.high64;
-}
-
-/* Seems to produce slightly better code on GCC for some reason. */
-XXH_FORCE_INLINE xxh_u64 XXH_xorshift64(xxh_u64 v64, int shift)
-{
- XXH_ASSERT(0 <= shift && shift < 64);
- return v64 ^ (v64 >> shift);
-}
-
-/*
- * This is a fast avalanche stage,
- * suitable when input bits are already partially mixed
- */
-static XXH64_hash_t XXH3_avalanche(xxh_u64 h64)
-{
- h64 = XXH_xorshift64(h64, 37);
- h64 *= 0x165667919E3779F9ULL;
- h64 = XXH_xorshift64(h64, 32);
- return h64;
-}
-
-/*
- * This is a stronger avalanche,
- * inspired by Pelle Evensen's rrmxmx
- * preferable when input has not been previously mixed
- */
-static XXH64_hash_t XXH3_rrmxmx(xxh_u64 h64, xxh_u64 len)
-{
- /* this mix is inspired by Pelle Evensen's rrmxmx */
- h64 ^= XXH_rotl64(h64, 49) ^ XXH_rotl64(h64, 24);
- h64 *= 0x9FB21C651E98DF25ULL;
- h64 ^= (h64 >> 35) + len ;
- h64 *= 0x9FB21C651E98DF25ULL;
- return XXH_xorshift64(h64, 28);
-}
-
-
-/* ==========================================
- * Short keys
- * ==========================================
- * One of the shortcomings of XXH32 and XXH64 was that their performance was
- * sub-optimal on short lengths. It used an iterative algorithm which strongly
- * favored lengths that were a multiple of 4 or 8.
- *
- * Instead of iterating over individual inputs, we use a set of single shot
- * functions which piece together a range of lengths and operate in constant time.
- *
- * Additionally, the number of multiplies has been significantly reduced. This
- * reduces latency, especially when emulating 64-bit multiplies on 32-bit.
- *
- * Depending on the platform, this may or may not be faster than XXH32, but it
- * is almost guaranteed to be faster than XXH64.
- */
-
-/*
- * At very short lengths, there isn't enough input to fully hide secrets, or use
- * the entire secret.
- *
- * There is also only a limited amount of mixing we can do before significantly
- * impacting performance.
- *
- * Therefore, we use different sections of the secret and always mix two secret
- * samples with an XOR. This should have no effect on performance on the
- * seedless or withSeed variants because everything _should_ be constant folded
- * by modern compilers.
- *
- * The XOR mixing hides individual parts of the secret and increases entropy.
- *
- * This adds an extra layer of strength for custom secrets.
- */
-XXH_FORCE_INLINE XXH64_hash_t
-XXH3_len_1to3_64b(const xxh_u8* input, size_t len, const xxh_u8* secret, XXH64_hash_t seed)
-{
- XXH_ASSERT(input != NULL);
- XXH_ASSERT(1 <= len && len <= 3);
- XXH_ASSERT(secret != NULL);
- /*
- * len = 1: combined = { input[0], 0x01, input[0], input[0] }
- * len = 2: combined = { input[1], 0x02, input[0], input[1] }
- * len = 3: combined = { input[2], 0x03, input[0], input[1] }
- */
- { xxh_u8 const c1 = input[0];
- xxh_u8 const c2 = input[len >> 1];
- xxh_u8 const c3 = input[len - 1];
- xxh_u32 const combined = ((xxh_u32)c1 << 16) | ((xxh_u32)c2 << 24)
- | ((xxh_u32)c3 << 0) | ((xxh_u32)len << 8);
- xxh_u64 const bitflip = (XXH_readLE32(secret) ^ XXH_readLE32(secret+4)) + seed;
- xxh_u64 const keyed = (xxh_u64)combined ^ bitflip;
- return XXH64_avalanche(keyed);
- }
-}
-
-XXH_FORCE_INLINE XXH64_hash_t
-XXH3_len_4to8_64b(const xxh_u8* input, size_t len, const xxh_u8* secret, XXH64_hash_t seed)
-{
- XXH_ASSERT(input != NULL);
- XXH_ASSERT(secret != NULL);
- XXH_ASSERT(4 <= len && len < 8);
- seed ^= (xxh_u64)XXH_swap32((xxh_u32)seed) << 32;
- { xxh_u32 const input1 = XXH_readLE32(input);
- xxh_u32 const input2 = XXH_readLE32(input + len - 4);
- xxh_u64 const bitflip = (XXH_readLE64(secret+8) ^ XXH_readLE64(secret+16)) - seed;
- xxh_u64 const input64 = input2 + (((xxh_u64)input1) << 32);
- xxh_u64 const keyed = input64 ^ bitflip;
- return XXH3_rrmxmx(keyed, len);
- }
-}
-
-XXH_FORCE_INLINE XXH64_hash_t
-XXH3_len_9to16_64b(const xxh_u8* input, size_t len, const xxh_u8* secret, XXH64_hash_t seed)
-{
- XXH_ASSERT(input != NULL);
- XXH_ASSERT(secret != NULL);
- XXH_ASSERT(8 <= len && len <= 16);
- { xxh_u64 const bitflip1 = (XXH_readLE64(secret+24) ^ XXH_readLE64(secret+32)) + seed;
- xxh_u64 const bitflip2 = (XXH_readLE64(secret+40) ^ XXH_readLE64(secret+48)) - seed;
- xxh_u64 const input_lo = XXH_readLE64(input) ^ bitflip1;
- xxh_u64 const input_hi = XXH_readLE64(input + len - 8) ^ bitflip2;
- xxh_u64 const acc = len
- + XXH_swap64(input_lo) + input_hi
- + XXH3_mul128_fold64(input_lo, input_hi);
- return XXH3_avalanche(acc);
- }
-}
-
-XXH_FORCE_INLINE XXH64_hash_t
-XXH3_len_0to16_64b(const xxh_u8* input, size_t len, const xxh_u8* secret, XXH64_hash_t seed)
-{
- XXH_ASSERT(len <= 16);
- { if (XXH_likely(len > 8)) return XXH3_len_9to16_64b(input, len, secret, seed);
- if (XXH_likely(len >= 4)) return XXH3_len_4to8_64b(input, len, secret, seed);
- if (len) return XXH3_len_1to3_64b(input, len, secret, seed);
- return XXH64_avalanche(seed ^ (XXH_readLE64(secret+56) ^ XXH_readLE64(secret+64)));
- }
-}
-
-/*
- * DISCLAIMER: There are known *seed-dependent* multicollisions here due to
- * multiplication by zero, affecting hashes of lengths 17 to 240.
- *
- * However, they are very unlikely.
- *
- * Keep this in mind when using the unseeded XXH3_64bits() variant: As with all
- * unseeded non-cryptographic hashes, it does not attempt to defend itself
- * against specially crafted inputs, only random inputs.
- *
- * Compared to classic UMAC where a 1 in 2^31 chance of 4 consecutive bytes
- * cancelling out the secret is taken an arbitrary number of times (addressed
- * in XXH3_accumulate_512), this collision is very unlikely with random inputs
- * and/or proper seeding:
- *
- * This only has a 1 in 2^63 chance of 8 consecutive bytes cancelling out, in a
- * function that is only called up to 16 times per hash with up to 240 bytes of
- * input.
- *
- * This is not too bad for a non-cryptographic hash function, especially with
- * only 64 bit outputs.
- *
- * The 128-bit variant (which trades some speed for strength) is NOT affected
- * by this, although it is always a good idea to use a proper seed if you care
- * about strength.
- */
-XXH_FORCE_INLINE xxh_u64 XXH3_mix16B(const xxh_u8* XXH_RESTRICT input,
- const xxh_u8* XXH_RESTRICT secret, xxh_u64 seed64)
-{
-#if defined(__GNUC__) && !defined(__clang__) /* GCC, not Clang */ \
- && defined(__i386__) && defined(__SSE2__) /* x86 + SSE2 */ \
- && !defined(XXH_ENABLE_AUTOVECTORIZE) /* Define to disable like XXH32 hack */
- /*
- * UGLY HACK:
- * GCC for x86 tends to autovectorize the 128-bit multiply, resulting in
- * slower code.
- *
- * By forcing seed64 into a register, we disrupt the cost model and
- * cause it to scalarize. See `XXH32_round()`
- *
- * FIXME: Clang's output is still _much_ faster -- On an AMD Ryzen 3600,
- * XXH3_64bits @ len=240 runs at 4.6 GB/s with Clang 9, but 3.3 GB/s on
- * GCC 9.2, despite both emitting scalar code.
- *
- * GCC generates much better scalar code than Clang for the rest of XXH3,
- * which is why finding a more optimal codepath is an interest.
- */
- __asm__ ("" : "+r" (seed64));
-#endif
- { xxh_u64 const input_lo = XXH_readLE64(input);
- xxh_u64 const input_hi = XXH_readLE64(input+8);
- return XXH3_mul128_fold64(
- input_lo ^ (XXH_readLE64(secret) + seed64),
- input_hi ^ (XXH_readLE64(secret+8) - seed64)
- );
- }
-}
-
-/* For mid range keys, XXH3 uses a Mum-hash variant. */
-XXH_FORCE_INLINE XXH64_hash_t
-XXH3_len_17to128_64b(const xxh_u8* XXH_RESTRICT input, size_t len,
- const xxh_u8* XXH_RESTRICT secret, size_t secretSize,
- XXH64_hash_t seed)
-{
- XXH_ASSERT(secretSize >= XXH3_SECRET_SIZE_MIN); (void)secretSize;
- XXH_ASSERT(16 < len && len <= 128);
-
- { xxh_u64 acc = len * XXH_PRIME64_1;
- if (len > 32) {
- if (len > 64) {
- if (len > 96) {
- acc += XXH3_mix16B(input+48, secret+96, seed);
- acc += XXH3_mix16B(input+len-64, secret+112, seed);
- }
- acc += XXH3_mix16B(input+32, secret+64, seed);
- acc += XXH3_mix16B(input+len-48, secret+80, seed);
- }
- acc += XXH3_mix16B(input+16, secret+32, seed);
- acc += XXH3_mix16B(input+len-32, secret+48, seed);
- }
- acc += XXH3_mix16B(input+0, secret+0, seed);
- acc += XXH3_mix16B(input+len-16, secret+16, seed);
-
- return XXH3_avalanche(acc);
- }
-}
-
-#define XXH3_MIDSIZE_MAX 240
-
-XXH_NO_INLINE XXH64_hash_t
-XXH3_len_129to240_64b(const xxh_u8* XXH_RESTRICT input, size_t len,
- const xxh_u8* XXH_RESTRICT secret, size_t secretSize,
- XXH64_hash_t seed)
-{
- XXH_ASSERT(secretSize >= XXH3_SECRET_SIZE_MIN); (void)secretSize;
- XXH_ASSERT(128 < len && len <= XXH3_MIDSIZE_MAX);
-
- #define XXH3_MIDSIZE_STARTOFFSET 3
- #define XXH3_MIDSIZE_LASTOFFSET 17
-
- { xxh_u64 acc = len * XXH_PRIME64_1;
- int const nbRounds = (int)len / 16;
- int i;
- for (i=0; i<8; i++) {
- acc += XXH3_mix16B(input+(16*i), secret+(16*i), seed);
- }
- acc = XXH3_avalanche(acc);
- XXH_ASSERT(nbRounds >= 8);
-#if defined(__clang__) /* Clang */ \
- && (defined(__ARM_NEON) || defined(__ARM_NEON__)) /* NEON */ \
- && !defined(XXH_ENABLE_AUTOVECTORIZE) /* Define to disable */
- /*
- * UGLY HACK:
- * Clang for ARMv7-A tries to vectorize this loop, similar to GCC x86.
- * In everywhere else, it uses scalar code.
- *
- * For 64->128-bit multiplies, even if the NEON was 100% optimal, it
- * would still be slower than UMAAL (see XXH_mult64to128).
- *
- * Unfortunately, Clang doesn't handle the long multiplies properly and
- * converts them to the nonexistent "vmulq_u64" intrinsic, which is then
- * scalarized into an ugly mess of VMOV.32 instructions.
- *
- * This mess is difficult to avoid without turning autovectorization
- * off completely, but they are usually relatively minor and/or not
- * worth it to fix.
- *
- * This loop is the easiest to fix, as unlike XXH32, this pragma
- * _actually works_ because it is a loop vectorization instead of an
- * SLP vectorization.
- */
- #pragma clang loop vectorize(disable)
-#endif
- for (i=8 ; i < nbRounds; i++) {
- acc += XXH3_mix16B(input+(16*i), secret+(16*(i-8)) + XXH3_MIDSIZE_STARTOFFSET, seed);
- }
- /* last bytes */
- acc += XXH3_mix16B(input + len - 16, secret + XXH3_SECRET_SIZE_MIN - XXH3_MIDSIZE_LASTOFFSET, seed);
- return XXH3_avalanche(acc);
- }
-}
-
-
-/* ======= Long Keys ======= */
-
-#define XXH_STRIPE_LEN 64
-#define XXH_SECRET_CONSUME_RATE 8 /* nb of secret bytes consumed at each accumulation */
-#define XXH_ACC_NB (XXH_STRIPE_LEN / sizeof(xxh_u64))
-
-#ifdef XXH_OLD_NAMES
-# define STRIPE_LEN XXH_STRIPE_LEN
-# define ACC_NB XXH_ACC_NB
-#endif
-
-XXH_FORCE_INLINE void XXH_writeLE64(void* dst, xxh_u64 v64)
-{
- if (!XXH_CPU_LITTLE_ENDIAN) v64 = XXH_swap64(v64);
- memcpy(dst, &v64, sizeof(v64));
-}
-
-/* Several intrinsic functions below are supposed to accept __int64 as argument,
- * as documented in https://software.intel.com/sites/landingpage/IntrinsicsGuide/ .
- * However, several environments do not define __int64 type,
- * requiring a workaround.
- */
-#if !defined (__VMS) \
- && (defined (__cplusplus) \
- || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
- typedef int64_t xxh_i64;
-#else
- /* the following type must have a width of 64-bit */
- typedef long long xxh_i64;
-#endif
-
-/*
- * XXH3_accumulate_512 is the tightest loop for long inputs, and it is the most optimized.
- *
- * It is a hardened version of UMAC, based off of FARSH's implementation.
- *
- * This was chosen because it adapts quite well to 32-bit, 64-bit, and SIMD
- * implementations, and it is ridiculously fast.
- *
- * We harden it by mixing the original input to the accumulators as well as the product.
- *
- * This means that in the (relatively likely) case of a multiply by zero, the
- * original input is preserved.
- *
- * On 128-bit inputs, we swap 64-bit pairs when we add the input to improve
- * cross-pollination, as otherwise the upper and lower halves would be
- * essentially independent.
- *
- * This doesn't matter on 64-bit hashes since they all get merged together in
- * the end, so we skip the extra step.
- *
- * Both XXH3_64bits and XXH3_128bits use this subroutine.
- */
-
-#if (XXH_VECTOR == XXH_AVX512) || defined(XXH_X86DISPATCH)
-
-#ifndef XXH_TARGET_AVX512
-# define XXH_TARGET_AVX512 /* disable attribute target */
-#endif
-
-XXH_FORCE_INLINE XXH_TARGET_AVX512 void
-XXH3_accumulate_512_avx512(void* XXH_RESTRICT acc,
- const void* XXH_RESTRICT input,
- const void* XXH_RESTRICT secret)
-{
- XXH_ALIGN(64) __m512i* const xacc = (__m512i *) acc;
- XXH_ASSERT((((size_t)acc) & 63) == 0);
- XXH_STATIC_ASSERT(XXH_STRIPE_LEN == sizeof(__m512i));
-
- {
- /* data_vec = input[0]; */
- __m512i const data_vec = _mm512_loadu_si512 (input);
- /* key_vec = secret[0]; */
- __m512i const key_vec = _mm512_loadu_si512 (secret);
- /* data_key = data_vec ^ key_vec; */
- __m512i const data_key = _mm512_xor_si512 (data_vec, key_vec);
- /* data_key_lo = data_key >> 32; */
- __m512i const data_key_lo = _mm512_shuffle_epi32 (data_key, (_MM_PERM_ENUM)_MM_SHUFFLE(0, 3, 0, 1));
- /* product = (data_key & 0xffffffff) * (data_key_lo & 0xffffffff); */
- __m512i const product = _mm512_mul_epu32 (data_key, data_key_lo);
- /* xacc[0] += swap(data_vec); */
- __m512i const data_swap = _mm512_shuffle_epi32(data_vec, (_MM_PERM_ENUM)_MM_SHUFFLE(1, 0, 3, 2));
- __m512i const sum = _mm512_add_epi64(*xacc, data_swap);
- /* xacc[0] += product; */
- *xacc = _mm512_add_epi64(product, sum);
- }
-}
-
-/*
- * XXH3_scrambleAcc: Scrambles the accumulators to improve mixing.
- *
- * Multiplication isn't perfect, as explained by Google in HighwayHash:
- *
- * // Multiplication mixes/scrambles bytes 0-7 of the 64-bit result to
- * // varying degrees. In descending order of goodness, bytes
- * // 3 4 2 5 1 6 0 7 have quality 228 224 164 160 100 96 36 32.
- * // As expected, the upper and lower bytes are much worse.
- *
- * Source: https://github.com/google/highwayhash/blob/0aaf66b/highwayhash/hh_avx2.h#L291
- *
- * Since our algorithm uses a pseudorandom secret to add some variance into the
- * mix, we don't need to (or want to) mix as often or as much as HighwayHash does.
- *
- * This isn't as tight as XXH3_accumulate, but still written in SIMD to avoid
- * extraction.
- *
- * Both XXH3_64bits and XXH3_128bits use this subroutine.
- */
-
-XXH_FORCE_INLINE XXH_TARGET_AVX512 void
-XXH3_scrambleAcc_avx512(void* XXH_RESTRICT acc, const void* XXH_RESTRICT secret)
-{
- XXH_ASSERT((((size_t)acc) & 63) == 0);
- XXH_STATIC_ASSERT(XXH_STRIPE_LEN == sizeof(__m512i));
- { XXH_ALIGN(64) __m512i* const xacc = (__m512i*) acc;
- const __m512i prime32 = _mm512_set1_epi32((int)XXH_PRIME32_1);
-
- /* xacc[0] ^= (xacc[0] >> 47) */
- __m512i const acc_vec = *xacc;
- __m512i const shifted = _mm512_srli_epi64 (acc_vec, 47);
- __m512i const data_vec = _mm512_xor_si512 (acc_vec, shifted);
- /* xacc[0] ^= secret; */
- __m512i const key_vec = _mm512_loadu_si512 (secret);
- __m512i const data_key = _mm512_xor_si512 (data_vec, key_vec);
-
- /* xacc[0] *= XXH_PRIME32_1; */
- __m512i const data_key_hi = _mm512_shuffle_epi32 (data_key, (_MM_PERM_ENUM)_MM_SHUFFLE(0, 3, 0, 1));
- __m512i const prod_lo = _mm512_mul_epu32 (data_key, prime32);
- __m512i const prod_hi = _mm512_mul_epu32 (data_key_hi, prime32);
- *xacc = _mm512_add_epi64(prod_lo, _mm512_slli_epi64(prod_hi, 32));
- }
-}
-
-XXH_FORCE_INLINE XXH_TARGET_AVX512 void
-XXH3_initCustomSecret_avx512(void* XXH_RESTRICT customSecret, xxh_u64 seed64)
-{
- XXH_STATIC_ASSERT((XXH_SECRET_DEFAULT_SIZE & 63) == 0);
- XXH_STATIC_ASSERT(XXH_SEC_ALIGN == 64);
- XXH_ASSERT(((size_t)customSecret & 63) == 0);
- (void)(&XXH_writeLE64);
- { int const nbRounds = XXH_SECRET_DEFAULT_SIZE / sizeof(__m512i);
- __m512i const seed = _mm512_mask_set1_epi64(_mm512_set1_epi64((xxh_i64)seed64), 0xAA, -(xxh_i64)seed64);
-
- XXH_ALIGN(64) const __m512i* const src = (const __m512i*) XXH3_kSecret;
- XXH_ALIGN(64) __m512i* const dest = ( __m512i*) customSecret;
- int i;
- for (i=0; i < nbRounds; ++i) {
- /* GCC has a bug, _mm512_stream_load_si512 accepts 'void*', not 'void const*',
- * this will warn "discards ‘const’ qualifier". */
- union {
- XXH_ALIGN(64) const __m512i* cp;
- XXH_ALIGN(64) void* p;
- } remote_const_void;
- remote_const_void.cp = src + i;
- dest[i] = _mm512_add_epi64(_mm512_stream_load_si512(remote_const_void.p), seed);
- } }
-}
-
-#endif
-
-#if (XXH_VECTOR == XXH_AVX2) || defined(XXH_X86DISPATCH)
-
-#ifndef XXH_TARGET_AVX2
-# define XXH_TARGET_AVX2 /* disable attribute target */
-#endif
-
-XXH_FORCE_INLINE XXH_TARGET_AVX2 void
-XXH3_accumulate_512_avx2( void* XXH_RESTRICT acc,
- const void* XXH_RESTRICT input,
- const void* XXH_RESTRICT secret)
-{
- XXH_ASSERT((((size_t)acc) & 31) == 0);
- { XXH_ALIGN(32) __m256i* const xacc = (__m256i *) acc;
- /* Unaligned. This is mainly for pointer arithmetic, and because
- * _mm256_loadu_si256 requires a const __m256i * pointer for some reason. */
- const __m256i* const xinput = (const __m256i *) input;
- /* Unaligned. This is mainly for pointer arithmetic, and because
- * _mm256_loadu_si256 requires a const __m256i * pointer for some reason. */
- const __m256i* const xsecret = (const __m256i *) secret;
-
- size_t i;
- for (i=0; i < XXH_STRIPE_LEN/sizeof(__m256i); i++) {
- /* data_vec = xinput[i]; */
- __m256i const data_vec = _mm256_loadu_si256 (xinput+i);
- /* key_vec = xsecret[i]; */
- __m256i const key_vec = _mm256_loadu_si256 (xsecret+i);
- /* data_key = data_vec ^ key_vec; */
- __m256i const data_key = _mm256_xor_si256 (data_vec, key_vec);
- /* data_key_lo = data_key >> 32; */
- __m256i const data_key_lo = _mm256_shuffle_epi32 (data_key, _MM_SHUFFLE(0, 3, 0, 1));
- /* product = (data_key & 0xffffffff) * (data_key_lo & 0xffffffff); */
- __m256i const product = _mm256_mul_epu32 (data_key, data_key_lo);
- /* xacc[i] += swap(data_vec); */
- __m256i const data_swap = _mm256_shuffle_epi32(data_vec, _MM_SHUFFLE(1, 0, 3, 2));
- __m256i const sum = _mm256_add_epi64(xacc[i], data_swap);
- /* xacc[i] += product; */
- xacc[i] = _mm256_add_epi64(product, sum);
- } }
-}
-
-XXH_FORCE_INLINE XXH_TARGET_AVX2 void
-XXH3_scrambleAcc_avx2(void* XXH_RESTRICT acc, const void* XXH_RESTRICT secret)
-{
- XXH_ASSERT((((size_t)acc) & 31) == 0);
- { XXH_ALIGN(32) __m256i* const xacc = (__m256i*) acc;
- /* Unaligned. This is mainly for pointer arithmetic, and because
- * _mm256_loadu_si256 requires a const __m256i * pointer for some reason. */
- const __m256i* const xsecret = (const __m256i *) secret;
- const __m256i prime32 = _mm256_set1_epi32((int)XXH_PRIME32_1);
-
- size_t i;
- for (i=0; i < XXH_STRIPE_LEN/sizeof(__m256i); i++) {
- /* xacc[i] ^= (xacc[i] >> 47) */
- __m256i const acc_vec = xacc[i];
- __m256i const shifted = _mm256_srli_epi64 (acc_vec, 47);
- __m256i const data_vec = _mm256_xor_si256 (acc_vec, shifted);
- /* xacc[i] ^= xsecret; */
- __m256i const key_vec = _mm256_loadu_si256 (xsecret+i);
- __m256i const data_key = _mm256_xor_si256 (data_vec, key_vec);
-
- /* xacc[i] *= XXH_PRIME32_1; */
- __m256i const data_key_hi = _mm256_shuffle_epi32 (data_key, _MM_SHUFFLE(0, 3, 0, 1));
- __m256i const prod_lo = _mm256_mul_epu32 (data_key, prime32);
- __m256i const prod_hi = _mm256_mul_epu32 (data_key_hi, prime32);
- xacc[i] = _mm256_add_epi64(prod_lo, _mm256_slli_epi64(prod_hi, 32));
- }
- }
-}
-
-XXH_FORCE_INLINE XXH_TARGET_AVX2 void XXH3_initCustomSecret_avx2(void* XXH_RESTRICT customSecret, xxh_u64 seed64)
-{
- XXH_STATIC_ASSERT((XXH_SECRET_DEFAULT_SIZE & 31) == 0);
- XXH_STATIC_ASSERT((XXH_SECRET_DEFAULT_SIZE / sizeof(__m256i)) == 6);
- XXH_STATIC_ASSERT(XXH_SEC_ALIGN <= 64);
- (void)(&XXH_writeLE64);
- XXH_PREFETCH(customSecret);
- { __m256i const seed = _mm256_set_epi64x(-(xxh_i64)seed64, (xxh_i64)seed64, -(xxh_i64)seed64, (xxh_i64)seed64);
-
- XXH_ALIGN(64) const __m256i* const src = (const __m256i*) XXH3_kSecret;
- XXH_ALIGN(64) __m256i* dest = ( __m256i*) customSecret;
-
-# if defined(__GNUC__) || defined(__clang__)
- /*
- * On GCC & Clang, marking 'dest' as modified will cause the compiler:
- * - do not extract the secret from sse registers in the internal loop
- * - use less common registers, and avoid pushing these reg into stack
- * The asm hack causes Clang to assume that XXH3_kSecretPtr aliases with
- * customSecret, and on aarch64, this prevented LDP from merging two
- * loads together for free. Putting the loads together before the stores
- * properly generates LDP.
- */
- __asm__("" : "+r" (dest));
-# endif
-
- /* GCC -O2 need unroll loop manually */
- dest[0] = _mm256_add_epi64(_mm256_stream_load_si256(src+0), seed);
- dest[1] = _mm256_add_epi64(_mm256_stream_load_si256(src+1), seed);
- dest[2] = _mm256_add_epi64(_mm256_stream_load_si256(src+2), seed);
- dest[3] = _mm256_add_epi64(_mm256_stream_load_si256(src+3), seed);
- dest[4] = _mm256_add_epi64(_mm256_stream_load_si256(src+4), seed);
- dest[5] = _mm256_add_epi64(_mm256_stream_load_si256(src+5), seed);
- }
-}
-
-#endif
-
-#if (XXH_VECTOR == XXH_SSE2) || defined(XXH_X86DISPATCH)
-
-#ifndef XXH_TARGET_SSE2
-# define XXH_TARGET_SSE2 /* disable attribute target */
-#endif
-
-XXH_FORCE_INLINE XXH_TARGET_SSE2 void
-XXH3_accumulate_512_sse2( void* XXH_RESTRICT acc,
- const void* XXH_RESTRICT input,
- const void* XXH_RESTRICT secret)
-{
- /* SSE2 is just a half-scale version of the AVX2 version. */
- XXH_ASSERT((((size_t)acc) & 15) == 0);
- { XXH_ALIGN(16) __m128i* const xacc = (__m128i *) acc;
- /* Unaligned. This is mainly for pointer arithmetic, and because
- * _mm_loadu_si128 requires a const __m128i * pointer for some reason. */
- const __m128i* const xinput = (const __m128i *) input;
- /* Unaligned. This is mainly for pointer arithmetic, and because
- * _mm_loadu_si128 requires a const __m128i * pointer for some reason. */
- const __m128i* const xsecret = (const __m128i *) secret;
-
- size_t i;
- for (i=0; i < XXH_STRIPE_LEN/sizeof(__m128i); i++) {
- /* data_vec = xinput[i]; */
- __m128i const data_vec = _mm_loadu_si128 (xinput+i);
- /* key_vec = xsecret[i]; */
- __m128i const key_vec = _mm_loadu_si128 (xsecret+i);
- /* data_key = data_vec ^ key_vec; */
- __m128i const data_key = _mm_xor_si128 (data_vec, key_vec);
- /* data_key_lo = data_key >> 32; */
- __m128i const data_key_lo = _mm_shuffle_epi32 (data_key, _MM_SHUFFLE(0, 3, 0, 1));
- /* product = (data_key & 0xffffffff) * (data_key_lo & 0xffffffff); */
- __m128i const product = _mm_mul_epu32 (data_key, data_key_lo);
- /* xacc[i] += swap(data_vec); */
- __m128i const data_swap = _mm_shuffle_epi32(data_vec, _MM_SHUFFLE(1,0,3,2));
- __m128i const sum = _mm_add_epi64(xacc[i], data_swap);
- /* xacc[i] += product; */
- xacc[i] = _mm_add_epi64(product, sum);
- } }
-}
-
-XXH_FORCE_INLINE XXH_TARGET_SSE2 void
-XXH3_scrambleAcc_sse2(void* XXH_RESTRICT acc, const void* XXH_RESTRICT secret)
-{
- XXH_ASSERT((((size_t)acc) & 15) == 0);
- { XXH_ALIGN(16) __m128i* const xacc = (__m128i*) acc;
- /* Unaligned. This is mainly for pointer arithmetic, and because
- * _mm_loadu_si128 requires a const __m128i * pointer for some reason. */
- const __m128i* const xsecret = (const __m128i *) secret;
- const __m128i prime32 = _mm_set1_epi32((int)XXH_PRIME32_1);
-
- size_t i;
- for (i=0; i < XXH_STRIPE_LEN/sizeof(__m128i); i++) {
- /* xacc[i] ^= (xacc[i] >> 47) */
- __m128i const acc_vec = xacc[i];
- __m128i const shifted = _mm_srli_epi64 (acc_vec, 47);
- __m128i const data_vec = _mm_xor_si128 (acc_vec, shifted);
- /* xacc[i] ^= xsecret[i]; */
- __m128i const key_vec = _mm_loadu_si128 (xsecret+i);
- __m128i const data_key = _mm_xor_si128 (data_vec, key_vec);
-
- /* xacc[i] *= XXH_PRIME32_1; */
- __m128i const data_key_hi = _mm_shuffle_epi32 (data_key, _MM_SHUFFLE(0, 3, 0, 1));
- __m128i const prod_lo = _mm_mul_epu32 (data_key, prime32);
- __m128i const prod_hi = _mm_mul_epu32 (data_key_hi, prime32);
- xacc[i] = _mm_add_epi64(prod_lo, _mm_slli_epi64(prod_hi, 32));
- }
- }
-}
-
-XXH_FORCE_INLINE XXH_TARGET_SSE2 void XXH3_initCustomSecret_sse2(void* XXH_RESTRICT customSecret, xxh_u64 seed64)
-{
- XXH_STATIC_ASSERT((XXH_SECRET_DEFAULT_SIZE & 15) == 0);
- (void)(&XXH_writeLE64);
- { int const nbRounds = XXH_SECRET_DEFAULT_SIZE / sizeof(__m128i);
-
-# if defined(_MSC_VER) && defined(_M_IX86) && _MSC_VER < 1900
- // MSVC 32bit mode does not support _mm_set_epi64x before 2015
- XXH_ALIGN(16) const xxh_i64 seed64x2[2] = { (xxh_i64)seed64, -(xxh_i64)seed64 };
- __m128i const seed = _mm_load_si128((__m128i const*)seed64x2);
-# else
- __m128i const seed = _mm_set_epi64x(-(xxh_i64)seed64, (xxh_i64)seed64);
-# endif
- int i;
-
- XXH_ALIGN(64) const float* const src = (float const*) XXH3_kSecret;
- XXH_ALIGN(XXH_SEC_ALIGN) __m128i* dest = (__m128i*) customSecret;
-# if defined(__GNUC__) || defined(__clang__)
- /*
- * On GCC & Clang, marking 'dest' as modified will cause the compiler:
- * - do not extract the secret from sse registers in the internal loop
- * - use less common registers, and avoid pushing these reg into stack
- */
- __asm__("" : "+r" (dest));
-# endif
-
- for (i=0; i < nbRounds; ++i) {
- dest[i] = _mm_add_epi64(_mm_castps_si128(_mm_load_ps(src+i*4)), seed);
- } }
-}
-
-#endif
-
-#if (XXH_VECTOR == XXH_NEON)
-
-XXH_FORCE_INLINE void
-XXH3_accumulate_512_neon( void* XXH_RESTRICT acc,
- const void* XXH_RESTRICT input,
- const void* XXH_RESTRICT secret)
-{
- XXH_ASSERT((((size_t)acc) & 15) == 0);
- {
- XXH_ALIGN(16) uint64x2_t* const xacc = (uint64x2_t *) acc;
- /* We don't use a uint32x4_t pointer because it causes bus errors on ARMv7. */
- uint8_t const* const xinput = (const uint8_t *) input;
- uint8_t const* const xsecret = (const uint8_t *) secret;
-
- size_t i;
- for (i=0; i < XXH_STRIPE_LEN / sizeof(uint64x2_t); i++) {
- /* data_vec = xinput[i]; */
- uint8x16_t data_vec = vld1q_u8(xinput + (i * 16));
- /* key_vec = xsecret[i]; */
- uint8x16_t key_vec = vld1q_u8(xsecret + (i * 16));
- uint64x2_t data_key;
- uint32x2_t data_key_lo, data_key_hi;
- /* xacc[i] += swap(data_vec); */
- uint64x2_t const data64 = vreinterpretq_u64_u8(data_vec);
- uint64x2_t const swapped = vextq_u64(data64, data64, 1);
- xacc[i] = vaddq_u64 (xacc[i], swapped);
- /* data_key = data_vec ^ key_vec; */
- data_key = vreinterpretq_u64_u8(veorq_u8(data_vec, key_vec));
- /* data_key_lo = (uint32x2_t) (data_key & 0xFFFFFFFF);
- * data_key_hi = (uint32x2_t) (data_key >> 32);
- * data_key = UNDEFINED; */
- XXH_SPLIT_IN_PLACE(data_key, data_key_lo, data_key_hi);
- /* xacc[i] += (uint64x2_t) data_key_lo * (uint64x2_t) data_key_hi; */
- xacc[i] = vmlal_u32 (xacc[i], data_key_lo, data_key_hi);
-
- }
- }
-}
-
-XXH_FORCE_INLINE void
-XXH3_scrambleAcc_neon(void* XXH_RESTRICT acc, const void* XXH_RESTRICT secret)
-{
- XXH_ASSERT((((size_t)acc) & 15) == 0);
-
- { uint64x2_t* xacc = (uint64x2_t*) acc;
- uint8_t const* xsecret = (uint8_t const*) secret;
- uint32x2_t prime = vdup_n_u32 (XXH_PRIME32_1);
-
- size_t i;
- for (i=0; i < XXH_STRIPE_LEN/sizeof(uint64x2_t); i++) {
- /* xacc[i] ^= (xacc[i] >> 47); */
- uint64x2_t acc_vec = xacc[i];
- uint64x2_t shifted = vshrq_n_u64 (acc_vec, 47);
- uint64x2_t data_vec = veorq_u64 (acc_vec, shifted);
-
- /* xacc[i] ^= xsecret[i]; */
- uint8x16_t key_vec = vld1q_u8(xsecret + (i * 16));
- uint64x2_t data_key = veorq_u64(data_vec, vreinterpretq_u64_u8(key_vec));
-
- /* xacc[i] *= XXH_PRIME32_1 */
- uint32x2_t data_key_lo, data_key_hi;
- /* data_key_lo = (uint32x2_t) (xacc[i] & 0xFFFFFFFF);
- * data_key_hi = (uint32x2_t) (xacc[i] >> 32);
- * xacc[i] = UNDEFINED; */
- XXH_SPLIT_IN_PLACE(data_key, data_key_lo, data_key_hi);
- { /*
- * prod_hi = (data_key >> 32) * XXH_PRIME32_1;
- *
- * Avoid vmul_u32 + vshll_n_u32 since Clang 6 and 7 will
- * incorrectly "optimize" this:
- * tmp = vmul_u32(vmovn_u64(a), vmovn_u64(b));
- * shifted = vshll_n_u32(tmp, 32);
- * to this:
- * tmp = "vmulq_u64"(a, b); // no such thing!
- * shifted = vshlq_n_u64(tmp, 32);
- *
- * However, unlike SSE, Clang lacks a 64-bit multiply routine
- * for NEON, and it scalarizes two 64-bit multiplies instead.
- *
- * vmull_u32 has the same timing as vmul_u32, and it avoids
- * this bug completely.
- * See https://bugs.llvm.org/show_bug.cgi?id=39967
- */
- uint64x2_t prod_hi = vmull_u32 (data_key_hi, prime);
- /* xacc[i] = prod_hi << 32; */
- xacc[i] = vshlq_n_u64(prod_hi, 32);
- /* xacc[i] += (prod_hi & 0xFFFFFFFF) * XXH_PRIME32_1; */
- xacc[i] = vmlal_u32(xacc[i], data_key_lo, prime);
- }
- } }
-}
-
-#endif
-
-#if (XXH_VECTOR == XXH_VSX)
-
-XXH_FORCE_INLINE void
-XXH3_accumulate_512_vsx( void* XXH_RESTRICT acc,
- const void* XXH_RESTRICT input,
- const void* XXH_RESTRICT secret)
-{
- xxh_u64x2* const xacc = (xxh_u64x2*) acc; /* presumed aligned */
- xxh_u64x2 const* const xinput = (xxh_u64x2 const*) input; /* no alignment restriction */
- xxh_u64x2 const* const xsecret = (xxh_u64x2 const*) secret; /* no alignment restriction */
- xxh_u64x2 const v32 = { 32, 32 };
- size_t i;
- for (i = 0; i < XXH_STRIPE_LEN / sizeof(xxh_u64x2); i++) {
- /* data_vec = xinput[i]; */
- xxh_u64x2 const data_vec = XXH_vec_loadu(xinput + i);
- /* key_vec = xsecret[i]; */
- xxh_u64x2 const key_vec = XXH_vec_loadu(xsecret + i);
- xxh_u64x2 const data_key = data_vec ^ key_vec;
- /* shuffled = (data_key << 32) | (data_key >> 32); */
- xxh_u32x4 const shuffled = (xxh_u32x4)vec_rl(data_key, v32);
- /* product = ((xxh_u64x2)data_key & 0xFFFFFFFF) * ((xxh_u64x2)shuffled & 0xFFFFFFFF); */
- xxh_u64x2 const product = XXH_vec_mulo((xxh_u32x4)data_key, shuffled);
- xacc[i] += product;
-
- /* swap high and low halves */
-#ifdef __s390x__
- xacc[i] += vec_permi(data_vec, data_vec, 2);
-#else
- xacc[i] += vec_xxpermdi(data_vec, data_vec, 2);
-#endif
- }
-}
-
-XXH_FORCE_INLINE void
-XXH3_scrambleAcc_vsx(void* XXH_RESTRICT acc, const void* XXH_RESTRICT secret)
-{
- XXH_ASSERT((((size_t)acc) & 15) == 0);
-
- { xxh_u64x2* const xacc = (xxh_u64x2*) acc;
- const xxh_u64x2* const xsecret = (const xxh_u64x2*) secret;
- /* constants */
- xxh_u64x2 const v32 = { 32, 32 };
- xxh_u64x2 const v47 = { 47, 47 };
- xxh_u32x4 const prime = { XXH_PRIME32_1, XXH_PRIME32_1, XXH_PRIME32_1, XXH_PRIME32_1 };
- size_t i;
- for (i = 0; i < XXH_STRIPE_LEN / sizeof(xxh_u64x2); i++) {
- /* xacc[i] ^= (xacc[i] >> 47); */
- xxh_u64x2 const acc_vec = xacc[i];
- xxh_u64x2 const data_vec = acc_vec ^ (acc_vec >> v47);
-
- /* xacc[i] ^= xsecret[i]; */
- xxh_u64x2 const key_vec = XXH_vec_loadu(xsecret + i);
- xxh_u64x2 const data_key = data_vec ^ key_vec;
-
- /* xacc[i] *= XXH_PRIME32_1 */
- /* prod_lo = ((xxh_u64x2)data_key & 0xFFFFFFFF) * ((xxh_u64x2)prime & 0xFFFFFFFF); */
- xxh_u64x2 const prod_even = XXH_vec_mule((xxh_u32x4)data_key, prime);
- /* prod_hi = ((xxh_u64x2)data_key >> 32) * ((xxh_u64x2)prime >> 32); */
- xxh_u64x2 const prod_odd = XXH_vec_mulo((xxh_u32x4)data_key, prime);
- xacc[i] = prod_odd + (prod_even << v32);
- } }
-}
-
-#endif
-
-/* scalar variants - universal */
-
-XXH_FORCE_INLINE void
-XXH3_accumulate_512_scalar(void* XXH_RESTRICT acc,
- const void* XXH_RESTRICT input,
- const void* XXH_RESTRICT secret)
-{
- XXH_ALIGN(XXH_ACC_ALIGN) xxh_u64* const xacc = (xxh_u64*) acc; /* presumed aligned */
- const xxh_u8* const xinput = (const xxh_u8*) input; /* no alignment restriction */
- const xxh_u8* const xsecret = (const xxh_u8*) secret; /* no alignment restriction */
- size_t i;
- XXH_ASSERT(((size_t)acc & (XXH_ACC_ALIGN-1)) == 0);
- for (i=0; i < XXH_ACC_NB; i++) {
- xxh_u64 const data_val = XXH_readLE64(xinput + 8*i);
- xxh_u64 const data_key = data_val ^ XXH_readLE64(xsecret + i*8);
- xacc[i ^ 1] += data_val; /* swap adjacent lanes */
- xacc[i] += XXH_mult32to64(data_key & 0xFFFFFFFF, data_key >> 32);
- }
-}
-
-XXH_FORCE_INLINE void
-XXH3_scrambleAcc_scalar(void* XXH_RESTRICT acc, const void* XXH_RESTRICT secret)
-{
- XXH_ALIGN(XXH_ACC_ALIGN) xxh_u64* const xacc = (xxh_u64*) acc; /* presumed aligned */
- const xxh_u8* const xsecret = (const xxh_u8*) secret; /* no alignment restriction */
- size_t i;
- XXH_ASSERT((((size_t)acc) & (XXH_ACC_ALIGN-1)) == 0);
- for (i=0; i < XXH_ACC_NB; i++) {
- xxh_u64 const key64 = XXH_readLE64(xsecret + 8*i);
- xxh_u64 acc64 = xacc[i];
- acc64 = XXH_xorshift64(acc64, 47);
- acc64 ^= key64;
- acc64 *= XXH_PRIME32_1;
- xacc[i] = acc64;
- }
-}
-
-XXH_FORCE_INLINE void
-XXH3_initCustomSecret_scalar(void* XXH_RESTRICT customSecret, xxh_u64 seed64)
-{
- /*
- * We need a separate pointer for the hack below,
- * which requires a non-const pointer.
- * Any decent compiler will optimize this out otherwise.
- */
- const xxh_u8* kSecretPtr = XXH3_kSecret;
- XXH_STATIC_ASSERT((XXH_SECRET_DEFAULT_SIZE & 15) == 0);
-
-#if defined(__clang__) && defined(__aarch64__)
- /*
- * UGLY HACK:
- * Clang generates a bunch of MOV/MOVK pairs for aarch64, and they are
- * placed sequentially, in order, at the top of the unrolled loop.
- *
- * While MOVK is great for generating constants (2 cycles for a 64-bit
- * constant compared to 4 cycles for LDR), long MOVK chains stall the
- * integer pipelines:
- * I L S
- * MOVK
- * MOVK
- * MOVK
- * MOVK
- * ADD
- * SUB STR
- * STR
- * By forcing loads from memory (as the asm line causes Clang to assume
- * that XXH3_kSecretPtr has been changed), the pipelines are used more
- * efficiently:
- * I L S
- * LDR
- * ADD LDR
- * SUB STR
- * STR
- * XXH3_64bits_withSeed, len == 256, Snapdragon 835
- * without hack: 2654.4 MB/s
- * with hack: 3202.9 MB/s
- */
- __asm__("" : "+r" (kSecretPtr));
-#endif
- /*
- * Note: in debug mode, this overrides the asm optimization
- * and Clang will emit MOVK chains again.
- */
- XXH_ASSERT(kSecretPtr == XXH3_kSecret);
-
- { int const nbRounds = XXH_SECRET_DEFAULT_SIZE / 16;
- int i;
- for (i=0; i < nbRounds; i++) {
- /*
- * The asm hack causes Clang to assume that kSecretPtr aliases with
- * customSecret, and on aarch64, this prevented LDP from merging two
- * loads together for free. Putting the loads together before the stores
- * properly generates LDP.
- */
- xxh_u64 lo = XXH_readLE64(kSecretPtr + 16*i) + seed64;
- xxh_u64 hi = XXH_readLE64(kSecretPtr + 16*i + 8) - seed64;
- XXH_writeLE64((xxh_u8*)customSecret + 16*i, lo);
- XXH_writeLE64((xxh_u8*)customSecret + 16*i + 8, hi);
- } }
-}
-
-
-typedef void (*XXH3_f_accumulate_512)(void* XXH_RESTRICT, const void*, const void*);
-typedef void (*XXH3_f_scrambleAcc)(void* XXH_RESTRICT, const void*);
-typedef void (*XXH3_f_initCustomSecret)(void* XXH_RESTRICT, xxh_u64);
-
-
-#if (XXH_VECTOR == XXH_AVX512)
-
-#define XXH3_accumulate_512 XXH3_accumulate_512_avx512
-#define XXH3_scrambleAcc XXH3_scrambleAcc_avx512
-#define XXH3_initCustomSecret XXH3_initCustomSecret_avx512
-
-#elif (XXH_VECTOR == XXH_AVX2)
-
-#define XXH3_accumulate_512 XXH3_accumulate_512_avx2
-#define XXH3_scrambleAcc XXH3_scrambleAcc_avx2
-#define XXH3_initCustomSecret XXH3_initCustomSecret_avx2
-
-#elif (XXH_VECTOR == XXH_SSE2)
-
-#define XXH3_accumulate_512 XXH3_accumulate_512_sse2
-#define XXH3_scrambleAcc XXH3_scrambleAcc_sse2
-#define XXH3_initCustomSecret XXH3_initCustomSecret_sse2
-
-#elif (XXH_VECTOR == XXH_NEON)
-
-#define XXH3_accumulate_512 XXH3_accumulate_512_neon
-#define XXH3_scrambleAcc XXH3_scrambleAcc_neon
-#define XXH3_initCustomSecret XXH3_initCustomSecret_scalar
-
-#elif (XXH_VECTOR == XXH_VSX)
-
-#define XXH3_accumulate_512 XXH3_accumulate_512_vsx
-#define XXH3_scrambleAcc XXH3_scrambleAcc_vsx
-#define XXH3_initCustomSecret XXH3_initCustomSecret_scalar
-
-#else /* scalar */
-
-#define XXH3_accumulate_512 XXH3_accumulate_512_scalar
-#define XXH3_scrambleAcc XXH3_scrambleAcc_scalar
-#define XXH3_initCustomSecret XXH3_initCustomSecret_scalar
-
-#endif
-
-
-
-#ifndef XXH_PREFETCH_DIST
-# ifdef __clang__
-# define XXH_PREFETCH_DIST 320
-# else
-# if (XXH_VECTOR == XXH_AVX512)
-# define XXH_PREFETCH_DIST 512
-# else
-# define XXH_PREFETCH_DIST 384
-# endif
-# endif /* __clang__ */
-#endif /* XXH_PREFETCH_DIST */
-
-/*
- * XXH3_accumulate()
- * Loops over XXH3_accumulate_512().
- * Assumption: nbStripes will not overflow the secret size
- */
-XXH_FORCE_INLINE void
-XXH3_accumulate( xxh_u64* XXH_RESTRICT acc,
- const xxh_u8* XXH_RESTRICT input,
- const xxh_u8* XXH_RESTRICT secret,
- size_t nbStripes,
- XXH3_f_accumulate_512 f_acc512)
-{
- size_t n;
- for (n = 0; n < nbStripes; n++ ) {
- const xxh_u8* const in = input + n*XXH_STRIPE_LEN;
- XXH_PREFETCH(in + XXH_PREFETCH_DIST);
- f_acc512(acc,
- in,
- secret + n*XXH_SECRET_CONSUME_RATE);
- }
-}
-
-XXH_FORCE_INLINE void
-XXH3_hashLong_internal_loop(xxh_u64* XXH_RESTRICT acc,
- const xxh_u8* XXH_RESTRICT input, size_t len,
- const xxh_u8* XXH_RESTRICT secret, size_t secretSize,
- XXH3_f_accumulate_512 f_acc512,
- XXH3_f_scrambleAcc f_scramble)
-{
- size_t const nbStripesPerBlock = (secretSize - XXH_STRIPE_LEN) / XXH_SECRET_CONSUME_RATE;
- size_t const block_len = XXH_STRIPE_LEN * nbStripesPerBlock;
- size_t const nb_blocks = (len - 1) / block_len;
-
- size_t n;
-
- XXH_ASSERT(secretSize >= XXH3_SECRET_SIZE_MIN);
-
- for (n = 0; n < nb_blocks; n++) {
- XXH3_accumulate(acc, input + n*block_len, secret, nbStripesPerBlock, f_acc512);
- f_scramble(acc, secret + secretSize - XXH_STRIPE_LEN);
- }
-
- /* last partial block */
- XXH_ASSERT(len > XXH_STRIPE_LEN);
- { size_t const nbStripes = ((len - 1) - (block_len * nb_blocks)) / XXH_STRIPE_LEN;
- XXH_ASSERT(nbStripes <= (secretSize / XXH_SECRET_CONSUME_RATE));
- XXH3_accumulate(acc, input + nb_blocks*block_len, secret, nbStripes, f_acc512);
-
- /* last stripe */
- { const xxh_u8* const p = input + len - XXH_STRIPE_LEN;
-#define XXH_SECRET_LASTACC_START 7 /* not aligned on 8, last secret is different from acc & scrambler */
- f_acc512(acc, p, secret + secretSize - XXH_STRIPE_LEN - XXH_SECRET_LASTACC_START);
- } }
-}
-
-XXH_FORCE_INLINE xxh_u64
-XXH3_mix2Accs(const xxh_u64* XXH_RESTRICT acc, const xxh_u8* XXH_RESTRICT secret)
-{
- return XXH3_mul128_fold64(
- acc[0] ^ XXH_readLE64(secret),
- acc[1] ^ XXH_readLE64(secret+8) );
-}
-
-static XXH64_hash_t
-XXH3_mergeAccs(const xxh_u64* XXH_RESTRICT acc, const xxh_u8* XXH_RESTRICT secret, xxh_u64 start)
-{
- xxh_u64 result64 = start;
- size_t i = 0;
-
- for (i = 0; i < 4; i++) {
- result64 += XXH3_mix2Accs(acc+2*i, secret + 16*i);
-#if defined(__clang__) /* Clang */ \
- && (defined(__arm__) || defined(__thumb__)) /* ARMv7 */ \
- && (defined(__ARM_NEON) || defined(__ARM_NEON__)) /* NEON */ \
- && !defined(XXH_ENABLE_AUTOVECTORIZE) /* Define to disable */
- /*
- * UGLY HACK:
- * Prevent autovectorization on Clang ARMv7-a. Exact same problem as
- * the one in XXH3_len_129to240_64b. Speeds up shorter keys > 240b.
- * XXH3_64bits, len == 256, Snapdragon 835:
- * without hack: 2063.7 MB/s
- * with hack: 2560.7 MB/s
- */
- __asm__("" : "+r" (result64));
-#endif
- }
-
- return XXH3_avalanche(result64);
-}
-
-#define XXH3_INIT_ACC { XXH_PRIME32_3, XXH_PRIME64_1, XXH_PRIME64_2, XXH_PRIME64_3, \
- XXH_PRIME64_4, XXH_PRIME32_2, XXH_PRIME64_5, XXH_PRIME32_1 }
-
-XXH_FORCE_INLINE XXH64_hash_t
-XXH3_hashLong_64b_internal(const void* XXH_RESTRICT input, size_t len,
- const void* XXH_RESTRICT secret, size_t secretSize,
- XXH3_f_accumulate_512 f_acc512,
- XXH3_f_scrambleAcc f_scramble)
-{
- XXH_ALIGN(XXH_ACC_ALIGN) xxh_u64 acc[XXH_ACC_NB] = XXH3_INIT_ACC;
-
- XXH3_hashLong_internal_loop(acc, (const xxh_u8*)input, len, (const xxh_u8*)secret, secretSize, f_acc512, f_scramble);
-
- /* converge into final hash */
- XXH_STATIC_ASSERT(sizeof(acc) == 64);
- /* do not align on 8, so that the secret is different from the accumulator */
-#define XXH_SECRET_MERGEACCS_START 11
- XXH_ASSERT(secretSize >= sizeof(acc) + XXH_SECRET_MERGEACCS_START);
- return XXH3_mergeAccs(acc, (const xxh_u8*)secret + XXH_SECRET_MERGEACCS_START, (xxh_u64)len * XXH_PRIME64_1);
-}
-
-/*
- * It's important for performance that XXH3_hashLong is not inlined.
- */
-XXH_NO_INLINE XXH64_hash_t
-XXH3_hashLong_64b_withSecret(const void* XXH_RESTRICT input, size_t len,
- XXH64_hash_t seed64, const xxh_u8* XXH_RESTRICT secret, size_t secretLen)
-{
- (void)seed64;
- return XXH3_hashLong_64b_internal(input, len, secret, secretLen, XXH3_accumulate_512, XXH3_scrambleAcc);
-}
-
-/*
- * It's important for performance that XXH3_hashLong is not inlined.
- * Since the function is not inlined, the compiler may not be able to understand that,
- * in some scenarios, its `secret` argument is actually a compile time constant.
- * This variant enforces that the compiler can detect that,
- * and uses this opportunity to streamline the generated code for better performance.
- */
-XXH_NO_INLINE XXH64_hash_t
-XXH3_hashLong_64b_default(const void* XXH_RESTRICT input, size_t len,
- XXH64_hash_t seed64, const xxh_u8* XXH_RESTRICT secret, size_t secretLen)
-{
- (void)seed64; (void)secret; (void)secretLen;
- return XXH3_hashLong_64b_internal(input, len, XXH3_kSecret, sizeof(XXH3_kSecret), XXH3_accumulate_512, XXH3_scrambleAcc);
-}
-
-/*
- * XXH3_hashLong_64b_withSeed():
- * Generate a custom key based on alteration of default XXH3_kSecret with the seed,
- * and then use this key for long mode hashing.
- *
- * This operation is decently fast but nonetheless costs a little bit of time.
- * Try to avoid it whenever possible (typically when seed==0).
- *
- * It's important for performance that XXH3_hashLong is not inlined. Not sure
- * why (uop cache maybe?), but the difference is large and easily measurable.
- */
-XXH_FORCE_INLINE XXH64_hash_t
-XXH3_hashLong_64b_withSeed_internal(const void* input, size_t len,
- XXH64_hash_t seed,
- XXH3_f_accumulate_512 f_acc512,
- XXH3_f_scrambleAcc f_scramble,
- XXH3_f_initCustomSecret f_initSec)
-{
- if (seed == 0)
- return XXH3_hashLong_64b_internal(input, len,
- XXH3_kSecret, sizeof(XXH3_kSecret),
- f_acc512, f_scramble);
- { XXH_ALIGN(XXH_SEC_ALIGN) xxh_u8 secret[XXH_SECRET_DEFAULT_SIZE];
- f_initSec(secret, seed);
- return XXH3_hashLong_64b_internal(input, len, secret, sizeof(secret),
- f_acc512, f_scramble);
- }
-}
-
-/*
- * It's important for performance that XXH3_hashLong is not inlined.
- */
-XXH_NO_INLINE XXH64_hash_t
-XXH3_hashLong_64b_withSeed(const void* input, size_t len,
- XXH64_hash_t seed, const xxh_u8* secret, size_t secretLen)
-{
- (void)secret; (void)secretLen;
- return XXH3_hashLong_64b_withSeed_internal(input, len, seed,
- XXH3_accumulate_512, XXH3_scrambleAcc, XXH3_initCustomSecret);
-}
-
-
-typedef XXH64_hash_t (*XXH3_hashLong64_f)(const void* XXH_RESTRICT, size_t,
- XXH64_hash_t, const xxh_u8* XXH_RESTRICT, size_t);
-
-XXH_FORCE_INLINE XXH64_hash_t
-XXH3_64bits_internal(const void* XXH_RESTRICT input, size_t len,
- XXH64_hash_t seed64, const void* XXH_RESTRICT secret, size_t secretLen,
- XXH3_hashLong64_f f_hashLong)
-{
- XXH_ASSERT(secretLen >= XXH3_SECRET_SIZE_MIN);
- /*
- * If an action is to be taken if `secretLen` condition is not respected,
- * it should be done here.
- * For now, it's a contract pre-condition.
- * Adding a check and a branch here would cost performance at every hash.
- * Also, note that function signature doesn't offer room to return an error.
- */
- if (len <= 16)
- return XXH3_len_0to16_64b((const xxh_u8*)input, len, (const xxh_u8*)secret, seed64);
- if (len <= 128)
- return XXH3_len_17to128_64b((const xxh_u8*)input, len, (const xxh_u8*)secret, secretLen, seed64);
- if (len <= XXH3_MIDSIZE_MAX)
- return XXH3_len_129to240_64b((const xxh_u8*)input, len, (const xxh_u8*)secret, secretLen, seed64);
- return f_hashLong(input, len, seed64, (const xxh_u8*)secret, secretLen);
-}
-
-
-/* === Public entry point === */
-
-XXH_PUBLIC_API XXH64_hash_t XXH3_64bits(const void* input, size_t len)
-{
- return XXH3_64bits_internal(input, len, 0, XXH3_kSecret, sizeof(XXH3_kSecret), XXH3_hashLong_64b_default);
-}
-
-XXH_PUBLIC_API XXH64_hash_t
-XXH3_64bits_withSecret(const void* input, size_t len, const void* secret, size_t secretSize)
-{
- return XXH3_64bits_internal(input, len, 0, secret, secretSize, XXH3_hashLong_64b_withSecret);
-}
-
-XXH_PUBLIC_API XXH64_hash_t
-XXH3_64bits_withSeed(const void* input, size_t len, XXH64_hash_t seed)
-{
- return XXH3_64bits_internal(input, len, seed, XXH3_kSecret, sizeof(XXH3_kSecret), XXH3_hashLong_64b_withSeed);
-}
-
-
-/* === XXH3 streaming === */
-
-/*
- * Malloc's a pointer that is always aligned to align.
- *
- * This must be freed with `XXH_alignedFree()`.
- *
- * malloc typically guarantees 16 byte alignment on 64-bit systems and 8 byte
- * alignment on 32-bit. This isn't enough for the 32 byte aligned loads in AVX2
- * or on 32-bit, the 16 byte aligned loads in SSE2 and NEON.
- *
- * This underalignment previously caused a rather obvious crash which went
- * completely unnoticed due to XXH3_createState() not actually being tested.
- * Credit to RedSpah for noticing this bug.
- *
- * The alignment is done manually: Functions like posix_memalign or _mm_malloc
- * are avoided: To maintain portability, we would have to write a fallback
- * like this anyways, and besides, testing for the existence of library
- * functions without relying on external build tools is impossible.
- *
- * The method is simple: Overallocate, manually align, and store the offset
- * to the original behind the returned pointer.
- *
- * Align must be a power of 2 and 8 <= align <= 128.
- */
-static void* XXH_alignedMalloc(size_t s, size_t align)
-{
- XXH_ASSERT(align <= 128 && align >= 8); /* range check */
- XXH_ASSERT((align & (align-1)) == 0); /* power of 2 */
- XXH_ASSERT(s != 0 && s < (s + align)); /* empty/overflow */
- { /* Overallocate to make room for manual realignment and an offset byte */
- xxh_u8* base = (xxh_u8*)XXH_malloc(s + align);
- if (base != NULL) {
- /*
- * Get the offset needed to align this pointer.
- *
- * Even if the returned pointer is aligned, there will always be
- * at least one byte to store the offset to the original pointer.
- */
- size_t offset = align - ((size_t)base & (align - 1)); /* base % align */
- /* Add the offset for the now-aligned pointer */
- xxh_u8* ptr = base + offset;
-
- XXH_ASSERT((size_t)ptr % align == 0);
-
- /* Store the offset immediately before the returned pointer. */
- ptr[-1] = (xxh_u8)offset;
- return ptr;
- }
- return NULL;
- }
-}
-/*
- * Frees an aligned pointer allocated by XXH_alignedMalloc(). Don't pass
- * normal malloc'd pointers, XXH_alignedMalloc has a specific data layout.
- */
-static void XXH_alignedFree(void* p)
-{
- if (p != NULL) {
- xxh_u8* ptr = (xxh_u8*)p;
- /* Get the offset byte we added in XXH_malloc. */
- xxh_u8 offset = ptr[-1];
- /* Free the original malloc'd pointer */
- xxh_u8* base = ptr - offset;
- XXH_free(base);
- }
-}
-XXH_PUBLIC_API XXH3_state_t* XXH3_createState(void)
-{
- XXH3_state_t* const state = (XXH3_state_t*)XXH_alignedMalloc(sizeof(XXH3_state_t), 64);
- if (state==NULL) return NULL;
- XXH3_INITSTATE(state);
- return state;
-}
-
-XXH_PUBLIC_API XXH_errorcode XXH3_freeState(XXH3_state_t* statePtr)
-{
- XXH_alignedFree(statePtr);
- return XXH_OK;
-}
-
-XXH_PUBLIC_API void
-XXH3_copyState(XXH3_state_t* dst_state, const XXH3_state_t* src_state)
-{
- memcpy(dst_state, src_state, sizeof(*dst_state));
-}
-
-static void
-XXH3_64bits_reset_internal(XXH3_state_t* statePtr,
- XXH64_hash_t seed,
- const void* secret, size_t secretSize)
-{
- size_t const initStart = offsetof(XXH3_state_t, bufferedSize);
- size_t const initLength = offsetof(XXH3_state_t, nbStripesPerBlock) - initStart;
- XXH_ASSERT(offsetof(XXH3_state_t, nbStripesPerBlock) > initStart);
- XXH_ASSERT(statePtr != NULL);
- /* set members from bufferedSize to nbStripesPerBlock (excluded) to 0 */
- memset((char*)statePtr + initStart, 0, initLength);
- statePtr->acc[0] = XXH_PRIME32_3;
- statePtr->acc[1] = XXH_PRIME64_1;
- statePtr->acc[2] = XXH_PRIME64_2;
- statePtr->acc[3] = XXH_PRIME64_3;
- statePtr->acc[4] = XXH_PRIME64_4;
- statePtr->acc[5] = XXH_PRIME32_2;
- statePtr->acc[6] = XXH_PRIME64_5;
- statePtr->acc[7] = XXH_PRIME32_1;
- statePtr->seed = seed;
- statePtr->extSecret = (const unsigned char*)secret;
- XXH_ASSERT(secretSize >= XXH3_SECRET_SIZE_MIN);
- statePtr->secretLimit = secretSize - XXH_STRIPE_LEN;
- statePtr->nbStripesPerBlock = statePtr->secretLimit / XXH_SECRET_CONSUME_RATE;
-}
-
-XXH_PUBLIC_API XXH_errorcode
-XXH3_64bits_reset(XXH3_state_t* statePtr)
-{
- if (statePtr == NULL) return XXH_ERROR;
- XXH3_64bits_reset_internal(statePtr, 0, XXH3_kSecret, XXH_SECRET_DEFAULT_SIZE);
- return XXH_OK;
-}
-
-XXH_PUBLIC_API XXH_errorcode
-XXH3_64bits_reset_withSecret(XXH3_state_t* statePtr, const void* secret, size_t secretSize)
-{
- if (statePtr == NULL) return XXH_ERROR;
- XXH3_64bits_reset_internal(statePtr, 0, secret, secretSize);
- if (secret == NULL) return XXH_ERROR;
- if (secretSize < XXH3_SECRET_SIZE_MIN) return XXH_ERROR;
- return XXH_OK;
-}
-
-XXH_PUBLIC_API XXH_errorcode
-XXH3_64bits_reset_withSeed(XXH3_state_t* statePtr, XXH64_hash_t seed)
-{
- if (statePtr == NULL) return XXH_ERROR;
- if (seed==0) return XXH3_64bits_reset(statePtr);
- if (seed != statePtr->seed) XXH3_initCustomSecret(statePtr->customSecret, seed);
- XXH3_64bits_reset_internal(statePtr, seed, NULL, XXH_SECRET_DEFAULT_SIZE);
- return XXH_OK;
-}
-
-/* Note : when XXH3_consumeStripes() is invoked,
- * there must be a guarantee that at least one more byte must be consumed from input
- * so that the function can blindly consume all stripes using the "normal" secret segment */
-XXH_FORCE_INLINE void
-XXH3_consumeStripes(xxh_u64* XXH_RESTRICT acc,
- size_t* XXH_RESTRICT nbStripesSoFarPtr, size_t nbStripesPerBlock,
- const xxh_u8* XXH_RESTRICT input, size_t nbStripes,
- const xxh_u8* XXH_RESTRICT secret, size_t secretLimit,
- XXH3_f_accumulate_512 f_acc512,
- XXH3_f_scrambleAcc f_scramble)
-{
- XXH_ASSERT(nbStripes <= nbStripesPerBlock); /* can handle max 1 scramble per invocation */
- XXH_ASSERT(*nbStripesSoFarPtr < nbStripesPerBlock);
- if (nbStripesPerBlock - *nbStripesSoFarPtr <= nbStripes) {
- /* need a scrambling operation */
- size_t const nbStripesToEndofBlock = nbStripesPerBlock - *nbStripesSoFarPtr;
- size_t const nbStripesAfterBlock = nbStripes - nbStripesToEndofBlock;
- XXH3_accumulate(acc, input, secret + nbStripesSoFarPtr[0] * XXH_SECRET_CONSUME_RATE, nbStripesToEndofBlock, f_acc512);
- f_scramble(acc, secret + secretLimit);
- XXH3_accumulate(acc, input + nbStripesToEndofBlock * XXH_STRIPE_LEN, secret, nbStripesAfterBlock, f_acc512);
- *nbStripesSoFarPtr = nbStripesAfterBlock;
- } else {
- XXH3_accumulate(acc, input, secret + nbStripesSoFarPtr[0] * XXH_SECRET_CONSUME_RATE, nbStripes, f_acc512);
- *nbStripesSoFarPtr += nbStripes;
- }
-}
-
-/*
- * Both XXH3_64bits_update and XXH3_128bits_update use this routine.
- */
-XXH_FORCE_INLINE XXH_errorcode
-XXH3_update(XXH3_state_t* state,
- const xxh_u8* input, size_t len,
- XXH3_f_accumulate_512 f_acc512,
- XXH3_f_scrambleAcc f_scramble)
-{
- if (input==NULL)
-#if defined(XXH_ACCEPT_NULL_INPUT_POINTER) && (XXH_ACCEPT_NULL_INPUT_POINTER>=1)
- return XXH_OK;
-#else
- return XXH_ERROR;
-#endif
-
- { const xxh_u8* const bEnd = input + len;
- const unsigned char* const secret = (state->extSecret == NULL) ? state->customSecret : state->extSecret;
-
- state->totalLen += len;
-
- if (state->bufferedSize + len <= XXH3_INTERNALBUFFER_SIZE) { /* fill in tmp buffer */
- XXH_memcpy(state->buffer + state->bufferedSize, input, len);
- state->bufferedSize += (XXH32_hash_t)len;
- return XXH_OK;
- }
- /* total input is now > XXH3_INTERNALBUFFER_SIZE */
-
- #define XXH3_INTERNALBUFFER_STRIPES (XXH3_INTERNALBUFFER_SIZE / XXH_STRIPE_LEN)
- XXH_STATIC_ASSERT(XXH3_INTERNALBUFFER_SIZE % XXH_STRIPE_LEN == 0); /* clean multiple */
-
- /*
- * Internal buffer is partially filled (always, except at beginning)
- * Complete it, then consume it.
- */
- if (state->bufferedSize) {
- size_t const loadSize = XXH3_INTERNALBUFFER_SIZE - state->bufferedSize;
- XXH_memcpy(state->buffer + state->bufferedSize, input, loadSize);
- input += loadSize;
- XXH3_consumeStripes(state->acc,
- &state->nbStripesSoFar, state->nbStripesPerBlock,
- state->buffer, XXH3_INTERNALBUFFER_STRIPES,
- secret, state->secretLimit,
- f_acc512, f_scramble);
- state->bufferedSize = 0;
- }
- XXH_ASSERT(input < bEnd);
-
- /* Consume input by a multiple of internal buffer size */
- if (input+XXH3_INTERNALBUFFER_SIZE < bEnd) {
- const xxh_u8* const limit = bEnd - XXH3_INTERNALBUFFER_SIZE;
- do {
- XXH3_consumeStripes(state->acc,
- &state->nbStripesSoFar, state->nbStripesPerBlock,
- input, XXH3_INTERNALBUFFER_STRIPES,
- secret, state->secretLimit,
- f_acc512, f_scramble);
- input += XXH3_INTERNALBUFFER_SIZE;
- } while (input<limit);
- /* for last partial stripe */
- memcpy(state->buffer + sizeof(state->buffer) - XXH_STRIPE_LEN, input - XXH_STRIPE_LEN, XXH_STRIPE_LEN);
- }
- XXH_ASSERT(input < bEnd);
-
- /* Some remaining input (always) : buffer it */
- XXH_memcpy(state->buffer, input, (size_t)(bEnd-input));
- state->bufferedSize = (XXH32_hash_t)(bEnd-input);
- }
-
- return XXH_OK;
-}
-
-XXH_PUBLIC_API XXH_errorcode
-XXH3_64bits_update(XXH3_state_t* state, const void* input, size_t len)
-{
- return XXH3_update(state, (const xxh_u8*)input, len,
- XXH3_accumulate_512, XXH3_scrambleAcc);
-}
-
-
-XXH_FORCE_INLINE void
-XXH3_digest_long (XXH64_hash_t* acc,
- const XXH3_state_t* state,
- const unsigned char* secret)
-{
- /*
- * Digest on a local copy. This way, the state remains unaltered, and it can
- * continue ingesting more input afterwards.
- */
- memcpy(acc, state->acc, sizeof(state->acc));
- if (state->bufferedSize >= XXH_STRIPE_LEN) {
- size_t const nbStripes = (state->bufferedSize - 1) / XXH_STRIPE_LEN;
- size_t nbStripesSoFar = state->nbStripesSoFar;
- XXH3_consumeStripes(acc,
- &nbStripesSoFar, state->nbStripesPerBlock,
- state->buffer, nbStripes,
- secret, state->secretLimit,
- XXH3_accumulate_512, XXH3_scrambleAcc);
- /* last stripe */
- XXH3_accumulate_512(acc,
- state->buffer + state->bufferedSize - XXH_STRIPE_LEN,
- secret + state->secretLimit - XXH_SECRET_LASTACC_START);
- } else { /* bufferedSize < XXH_STRIPE_LEN */
- xxh_u8 lastStripe[XXH_STRIPE_LEN];
- size_t const catchupSize = XXH_STRIPE_LEN - state->bufferedSize;
- XXH_ASSERT(state->bufferedSize > 0); /* there is always some input buffered */
- memcpy(lastStripe, state->buffer + sizeof(state->buffer) - catchupSize, catchupSize);
- memcpy(lastStripe + catchupSize, state->buffer, state->bufferedSize);
- XXH3_accumulate_512(acc,
- lastStripe,
- secret + state->secretLimit - XXH_SECRET_LASTACC_START);
- }
-}
-
-XXH_PUBLIC_API XXH64_hash_t XXH3_64bits_digest (const XXH3_state_t* state)
-{
- const unsigned char* const secret = (state->extSecret == NULL) ? state->customSecret : state->extSecret;
- if (state->totalLen > XXH3_MIDSIZE_MAX) {
- XXH_ALIGN(XXH_ACC_ALIGN) XXH64_hash_t acc[XXH_ACC_NB];
- XXH3_digest_long(acc, state, secret);
- return XXH3_mergeAccs(acc,
- secret + XXH_SECRET_MERGEACCS_START,
- (xxh_u64)state->totalLen * XXH_PRIME64_1);
- }
- /* totalLen <= XXH3_MIDSIZE_MAX: digesting a short input */
- if (state->seed)
- return XXH3_64bits_withSeed(state->buffer, (size_t)state->totalLen, state->seed);
- return XXH3_64bits_withSecret(state->buffer, (size_t)(state->totalLen),
- secret, state->secretLimit + XXH_STRIPE_LEN);
-}
-
-
-#define XXH_MIN(x, y) (((x) > (y)) ? (y) : (x))
-
-XXH_PUBLIC_API void
-XXH3_generateSecret(void* secretBuffer, const void* customSeed, size_t customSeedSize)
-{
- XXH_ASSERT(secretBuffer != NULL);
- if (customSeedSize == 0) {
- memcpy(secretBuffer, XXH3_kSecret, XXH_SECRET_DEFAULT_SIZE);
- return;
- }
- XXH_ASSERT(customSeed != NULL);
-
- { size_t const segmentSize = sizeof(XXH128_hash_t);
- size_t const nbSegments = XXH_SECRET_DEFAULT_SIZE / segmentSize;
- XXH128_canonical_t scrambler;
- XXH64_hash_t seeds[12];
- size_t segnb;
- XXH_ASSERT(nbSegments == 12);
- XXH_ASSERT(segmentSize * nbSegments == XXH_SECRET_DEFAULT_SIZE); /* exact multiple */
- XXH128_canonicalFromHash(&scrambler, XXH128(customSeed, customSeedSize, 0));
-
- /*
- * Copy customSeed to seeds[], truncating or repeating as necessary.
- */
- { size_t toFill = XXH_MIN(customSeedSize, sizeof(seeds));
- size_t filled = toFill;
- memcpy(seeds, customSeed, toFill);
- while (filled < sizeof(seeds)) {
- toFill = XXH_MIN(filled, sizeof(seeds) - filled);
- memcpy((char*)seeds + filled, seeds, toFill);
- filled += toFill;
- } }
-
- /* generate secret */
- memcpy(secretBuffer, &scrambler, sizeof(scrambler));
- for (segnb=1; segnb < nbSegments; segnb++) {
- size_t const segmentStart = segnb * segmentSize;
- XXH128_canonical_t segment;
- XXH128_canonicalFromHash(&segment,
- XXH128(&scrambler, sizeof(scrambler), XXH_readLE64(seeds + segnb) + segnb) );
- memcpy((char*)secretBuffer + segmentStart, &segment, sizeof(segment));
- } }
-}
-
-
-/* ==========================================
- * XXH3 128 bits (a.k.a XXH128)
- * ==========================================
- * XXH3's 128-bit variant has better mixing and strength than the 64-bit variant,
- * even without counting the significantly larger output size.
- *
- * For example, extra steps are taken to avoid the seed-dependent collisions
- * in 17-240 byte inputs (See XXH3_mix16B and XXH128_mix32B).
- *
- * This strength naturally comes at the cost of some speed, especially on short
- * lengths. Note that longer hashes are about as fast as the 64-bit version
- * due to it using only a slight modification of the 64-bit loop.
- *
- * XXH128 is also more oriented towards 64-bit machines. It is still extremely
- * fast for a _128-bit_ hash on 32-bit (it usually clears XXH64).
- */
-
-XXH_FORCE_INLINE XXH128_hash_t
-XXH3_len_1to3_128b(const xxh_u8* input, size_t len, const xxh_u8* secret, XXH64_hash_t seed)
-{
- /* A doubled version of 1to3_64b with different constants. */
- XXH_ASSERT(input != NULL);
- XXH_ASSERT(1 <= len && len <= 3);
- XXH_ASSERT(secret != NULL);
- /*
- * len = 1: combinedl = { input[0], 0x01, input[0], input[0] }
- * len = 2: combinedl = { input[1], 0x02, input[0], input[1] }
- * len = 3: combinedl = { input[2], 0x03, input[0], input[1] }
- */
- { xxh_u8 const c1 = input[0];
- xxh_u8 const c2 = input[len >> 1];
- xxh_u8 const c3 = input[len - 1];
- xxh_u32 const combinedl = ((xxh_u32)c1 <<16) | ((xxh_u32)c2 << 24)
- | ((xxh_u32)c3 << 0) | ((xxh_u32)len << 8);
- xxh_u32 const combinedh = XXH_rotl32(XXH_swap32(combinedl), 13);
- xxh_u64 const bitflipl = (XXH_readLE32(secret) ^ XXH_readLE32(secret+4)) + seed;
- xxh_u64 const bitfliph = (XXH_readLE32(secret+8) ^ XXH_readLE32(secret+12)) - seed;
- xxh_u64 const keyed_lo = (xxh_u64)combinedl ^ bitflipl;
- xxh_u64 const keyed_hi = (xxh_u64)combinedh ^ bitfliph;
- XXH128_hash_t h128;
- h128.low64 = XXH64_avalanche(keyed_lo);
- h128.high64 = XXH64_avalanche(keyed_hi);
- return h128;
- }
-}
-
-XXH_FORCE_INLINE XXH128_hash_t
-XXH3_len_4to8_128b(const xxh_u8* input, size_t len, const xxh_u8* secret, XXH64_hash_t seed)
-{
- XXH_ASSERT(input != NULL);
- XXH_ASSERT(secret != NULL);
- XXH_ASSERT(4 <= len && len <= 8);
- seed ^= (xxh_u64)XXH_swap32((xxh_u32)seed) << 32;
- { xxh_u32 const input_lo = XXH_readLE32(input);
- xxh_u32 const input_hi = XXH_readLE32(input + len - 4);
- xxh_u64 const input_64 = input_lo + ((xxh_u64)input_hi << 32);
- xxh_u64 const bitflip = (XXH_readLE64(secret+16) ^ XXH_readLE64(secret+24)) + seed;
- xxh_u64 const keyed = input_64 ^ bitflip;
-
- /* Shift len to the left to ensure it is even, this avoids even multiplies. */
- XXH128_hash_t m128 = XXH_mult64to128(keyed, XXH_PRIME64_1 + (len << 2));
-
- m128.high64 += (m128.low64 << 1);
- m128.low64 ^= (m128.high64 >> 3);
-
- m128.low64 = XXH_xorshift64(m128.low64, 35);
- m128.low64 *= 0x9FB21C651E98DF25ULL;
- m128.low64 = XXH_xorshift64(m128.low64, 28);
- m128.high64 = XXH3_avalanche(m128.high64);
- return m128;
- }
-}
-
-XXH_FORCE_INLINE XXH128_hash_t
-XXH3_len_9to16_128b(const xxh_u8* input, size_t len, const xxh_u8* secret, XXH64_hash_t seed)
-{
- XXH_ASSERT(input != NULL);
- XXH_ASSERT(secret != NULL);
- XXH_ASSERT(9 <= len && len <= 16);
- { xxh_u64 const bitflipl = (XXH_readLE64(secret+32) ^ XXH_readLE64(secret+40)) - seed;
- xxh_u64 const bitfliph = (XXH_readLE64(secret+48) ^ XXH_readLE64(secret+56)) + seed;
- xxh_u64 const input_lo = XXH_readLE64(input);
- xxh_u64 input_hi = XXH_readLE64(input + len - 8);
- XXH128_hash_t m128 = XXH_mult64to128(input_lo ^ input_hi ^ bitflipl, XXH_PRIME64_1);
- /*
- * Put len in the middle of m128 to ensure that the length gets mixed to
- * both the low and high bits in the 128x64 multiply below.
- */
- m128.low64 += (xxh_u64)(len - 1) << 54;
- input_hi ^= bitfliph;
- /*
- * Add the high 32 bits of input_hi to the high 32 bits of m128, then
- * add the long product of the low 32 bits of input_hi and XXH_PRIME32_2 to
- * the high 64 bits of m128.
- *
- * The best approach to this operation is different on 32-bit and 64-bit.
- */
- if (sizeof(void *) < sizeof(xxh_u64)) { /* 32-bit */
- /*
- * 32-bit optimized version, which is more readable.
- *
- * On 32-bit, it removes an ADC and delays a dependency between the two
- * halves of m128.high64, but it generates an extra mask on 64-bit.
- */
- m128.high64 += (input_hi & 0xFFFFFFFF00000000ULL) + XXH_mult32to64((xxh_u32)input_hi, XXH_PRIME32_2);
- } else {
- /*
- * 64-bit optimized (albeit more confusing) version.
- *
- * Uses some properties of addition and multiplication to remove the mask:
- *
- * Let:
- * a = input_hi.lo = (input_hi & 0x00000000FFFFFFFF)
- * b = input_hi.hi = (input_hi & 0xFFFFFFFF00000000)
- * c = XXH_PRIME32_2
- *
- * a + (b * c)
- * Inverse Property: x + y - x == y
- * a + (b * (1 + c - 1))
- * Distributive Property: x * (y + z) == (x * y) + (x * z)
- * a + (b * 1) + (b * (c - 1))
- * Identity Property: x * 1 == x
- * a + b + (b * (c - 1))
- *
- * Substitute a, b, and c:
- * input_hi.hi + input_hi.lo + ((xxh_u64)input_hi.lo * (XXH_PRIME32_2 - 1))
- *
- * Since input_hi.hi + input_hi.lo == input_hi, we get this:
- * input_hi + ((xxh_u64)input_hi.lo * (XXH_PRIME32_2 - 1))
- */
- m128.high64 += input_hi + XXH_mult32to64((xxh_u32)input_hi, XXH_PRIME32_2 - 1);
- }
- /* m128 ^= XXH_swap64(m128 >> 64); */
- m128.low64 ^= XXH_swap64(m128.high64);
-
- { /* 128x64 multiply: h128 = m128 * XXH_PRIME64_2; */
- XXH128_hash_t h128 = XXH_mult64to128(m128.low64, XXH_PRIME64_2);
- h128.high64 += m128.high64 * XXH_PRIME64_2;
-
- h128.low64 = XXH3_avalanche(h128.low64);
- h128.high64 = XXH3_avalanche(h128.high64);
- return h128;
- } }
-}
-
-/*
- * Assumption: `secret` size is >= XXH3_SECRET_SIZE_MIN
- */
-XXH_FORCE_INLINE XXH128_hash_t
-XXH3_len_0to16_128b(const xxh_u8* input, size_t len, const xxh_u8* secret, XXH64_hash_t seed)
-{
- XXH_ASSERT(len <= 16);
- { if (len > 8) return XXH3_len_9to16_128b(input, len, secret, seed);
- if (len >= 4) return XXH3_len_4to8_128b(input, len, secret, seed);
- if (len) return XXH3_len_1to3_128b(input, len, secret, seed);
- { XXH128_hash_t h128;
- xxh_u64 const bitflipl = XXH_readLE64(secret+64) ^ XXH_readLE64(secret+72);
- xxh_u64 const bitfliph = XXH_readLE64(secret+80) ^ XXH_readLE64(secret+88);
- h128.low64 = XXH64_avalanche(seed ^ bitflipl);
- h128.high64 = XXH64_avalanche( seed ^ bitfliph);
- return h128;
- } }
-}
-
-/*
- * A bit slower than XXH3_mix16B, but handles multiply by zero better.
- */
-XXH_FORCE_INLINE XXH128_hash_t
-XXH128_mix32B(XXH128_hash_t acc, const xxh_u8* input_1, const xxh_u8* input_2,
- const xxh_u8* secret, XXH64_hash_t seed)
-{
- acc.low64 += XXH3_mix16B (input_1, secret+0, seed);
- acc.low64 ^= XXH_readLE64(input_2) + XXH_readLE64(input_2 + 8);
- acc.high64 += XXH3_mix16B (input_2, secret+16, seed);
- acc.high64 ^= XXH_readLE64(input_1) + XXH_readLE64(input_1 + 8);
- return acc;
-}
-
-
-XXH_FORCE_INLINE XXH128_hash_t
-XXH3_len_17to128_128b(const xxh_u8* XXH_RESTRICT input, size_t len,
- const xxh_u8* XXH_RESTRICT secret, size_t secretSize,
- XXH64_hash_t seed)
-{
- XXH_ASSERT(secretSize >= XXH3_SECRET_SIZE_MIN); (void)secretSize;
- XXH_ASSERT(16 < len && len <= 128);
-
- { XXH128_hash_t acc;
- acc.low64 = len * XXH_PRIME64_1;
- acc.high64 = 0;
- if (len > 32) {
- if (len > 64) {
- if (len > 96) {
- acc = XXH128_mix32B(acc, input+48, input+len-64, secret+96, seed);
- }
- acc = XXH128_mix32B(acc, input+32, input+len-48, secret+64, seed);
- }
- acc = XXH128_mix32B(acc, input+16, input+len-32, secret+32, seed);
- }
- acc = XXH128_mix32B(acc, input, input+len-16, secret, seed);
- { XXH128_hash_t h128;
- h128.low64 = acc.low64 + acc.high64;
- h128.high64 = (acc.low64 * XXH_PRIME64_1)
- + (acc.high64 * XXH_PRIME64_4)
- + ((len - seed) * XXH_PRIME64_2);
- h128.low64 = XXH3_avalanche(h128.low64);
- h128.high64 = (XXH64_hash_t)0 - XXH3_avalanche(h128.high64);
- return h128;
- }
- }
-}
-
-XXH_NO_INLINE XXH128_hash_t
-XXH3_len_129to240_128b(const xxh_u8* XXH_RESTRICT input, size_t len,
- const xxh_u8* XXH_RESTRICT secret, size_t secretSize,
- XXH64_hash_t seed)
-{
- XXH_ASSERT(secretSize >= XXH3_SECRET_SIZE_MIN); (void)secretSize;
- XXH_ASSERT(128 < len && len <= XXH3_MIDSIZE_MAX);
-
- { XXH128_hash_t acc;
- int const nbRounds = (int)len / 32;
- int i;
- acc.low64 = len * XXH_PRIME64_1;
- acc.high64 = 0;
- for (i=0; i<4; i++) {
- acc = XXH128_mix32B(acc,
- input + (32 * i),
- input + (32 * i) + 16,
- secret + (32 * i),
- seed);
- }
- acc.low64 = XXH3_avalanche(acc.low64);
- acc.high64 = XXH3_avalanche(acc.high64);
- XXH_ASSERT(nbRounds >= 4);
- for (i=4 ; i < nbRounds; i++) {
- acc = XXH128_mix32B(acc,
- input + (32 * i),
- input + (32 * i) + 16,
- secret + XXH3_MIDSIZE_STARTOFFSET + (32 * (i - 4)),
- seed);
- }
- /* last bytes */
- acc = XXH128_mix32B(acc,
- input + len - 16,
- input + len - 32,
- secret + XXH3_SECRET_SIZE_MIN - XXH3_MIDSIZE_LASTOFFSET - 16,
- 0ULL - seed);
-
- { XXH128_hash_t h128;
- h128.low64 = acc.low64 + acc.high64;
- h128.high64 = (acc.low64 * XXH_PRIME64_1)
- + (acc.high64 * XXH_PRIME64_4)
- + ((len - seed) * XXH_PRIME64_2);
- h128.low64 = XXH3_avalanche(h128.low64);
- h128.high64 = (XXH64_hash_t)0 - XXH3_avalanche(h128.high64);
- return h128;
- }
- }
-}
-
-XXH_FORCE_INLINE XXH128_hash_t
-XXH3_hashLong_128b_internal(const void* XXH_RESTRICT input, size_t len,
- const xxh_u8* XXH_RESTRICT secret, size_t secretSize,
- XXH3_f_accumulate_512 f_acc512,
- XXH3_f_scrambleAcc f_scramble)
-{
- XXH_ALIGN(XXH_ACC_ALIGN) xxh_u64 acc[XXH_ACC_NB] = XXH3_INIT_ACC;
-
- XXH3_hashLong_internal_loop(acc, (const xxh_u8*)input, len, secret, secretSize, f_acc512, f_scramble);
-
- /* converge into final hash */
- XXH_STATIC_ASSERT(sizeof(acc) == 64);
- XXH_ASSERT(secretSize >= sizeof(acc) + XXH_SECRET_MERGEACCS_START);
- { XXH128_hash_t h128;
- h128.low64 = XXH3_mergeAccs(acc,
- secret + XXH_SECRET_MERGEACCS_START,
- (xxh_u64)len * XXH_PRIME64_1);
- h128.high64 = XXH3_mergeAccs(acc,
- secret + secretSize
- - sizeof(acc) - XXH_SECRET_MERGEACCS_START,
- ~((xxh_u64)len * XXH_PRIME64_2));
- return h128;
- }
-}
-
-/*
- * It's important for performance that XXH3_hashLong is not inlined.
- */
-XXH_NO_INLINE XXH128_hash_t
-XXH3_hashLong_128b_default(const void* XXH_RESTRICT input, size_t len,
- XXH64_hash_t seed64,
- const void* XXH_RESTRICT secret, size_t secretLen)
-{
- (void)seed64; (void)secret; (void)secretLen;
- return XXH3_hashLong_128b_internal(input, len, XXH3_kSecret, sizeof(XXH3_kSecret),
- XXH3_accumulate_512, XXH3_scrambleAcc);
-}
-
-/*
- * It's important for performance that XXH3_hashLong is not inlined.
- */
-XXH_NO_INLINE XXH128_hash_t
-XXH3_hashLong_128b_withSecret(const void* XXH_RESTRICT input, size_t len,
- XXH64_hash_t seed64,
- const void* XXH_RESTRICT secret, size_t secretLen)
-{
- (void)seed64;
- return XXH3_hashLong_128b_internal(input, len, (const xxh_u8*)secret, secretLen,
- XXH3_accumulate_512, XXH3_scrambleAcc);
-}
-
-XXH_FORCE_INLINE XXH128_hash_t
-XXH3_hashLong_128b_withSeed_internal(const void* XXH_RESTRICT input, size_t len,
- XXH64_hash_t seed64,
- XXH3_f_accumulate_512 f_acc512,
- XXH3_f_scrambleAcc f_scramble,
- XXH3_f_initCustomSecret f_initSec)
-{
- if (seed64 == 0)
- return XXH3_hashLong_128b_internal(input, len,
- XXH3_kSecret, sizeof(XXH3_kSecret),
- f_acc512, f_scramble);
- { XXH_ALIGN(XXH_SEC_ALIGN) xxh_u8 secret[XXH_SECRET_DEFAULT_SIZE];
- f_initSec(secret, seed64);
- return XXH3_hashLong_128b_internal(input, len, (const xxh_u8*)secret, sizeof(secret),
- f_acc512, f_scramble);
- }
-}
-
-/*
- * It's important for performance that XXH3_hashLong is not inlined.
- */
-XXH_NO_INLINE XXH128_hash_t
-XXH3_hashLong_128b_withSeed(const void* input, size_t len,
- XXH64_hash_t seed64, const void* XXH_RESTRICT secret, size_t secretLen)
-{
- (void)secret; (void)secretLen;
- return XXH3_hashLong_128b_withSeed_internal(input, len, seed64,
- XXH3_accumulate_512, XXH3_scrambleAcc, XXH3_initCustomSecret);
-}
-
-typedef XXH128_hash_t (*XXH3_hashLong128_f)(const void* XXH_RESTRICT, size_t,
- XXH64_hash_t, const void* XXH_RESTRICT, size_t);
-
-XXH_FORCE_INLINE XXH128_hash_t
-XXH3_128bits_internal(const void* input, size_t len,
- XXH64_hash_t seed64, const void* XXH_RESTRICT secret, size_t secretLen,
- XXH3_hashLong128_f f_hl128)
-{
- XXH_ASSERT(secretLen >= XXH3_SECRET_SIZE_MIN);
- /*
- * If an action is to be taken if `secret` conditions are not respected,
- * it should be done here.
- * For now, it's a contract pre-condition.
- * Adding a check and a branch here would cost performance at every hash.
- */
- if (len <= 16)
- return XXH3_len_0to16_128b((const xxh_u8*)input, len, (const xxh_u8*)secret, seed64);
- if (len <= 128)
- return XXH3_len_17to128_128b((const xxh_u8*)input, len, (const xxh_u8*)secret, secretLen, seed64);
- if (len <= XXH3_MIDSIZE_MAX)
- return XXH3_len_129to240_128b((const xxh_u8*)input, len, (const xxh_u8*)secret, secretLen, seed64);
- return f_hl128(input, len, seed64, secret, secretLen);
-}
-
-
-/* === Public XXH128 API === */
-
-XXH_PUBLIC_API XXH128_hash_t XXH3_128bits(const void* input, size_t len)
-{
- return XXH3_128bits_internal(input, len, 0,
- XXH3_kSecret, sizeof(XXH3_kSecret),
- XXH3_hashLong_128b_default);
-}
-
-XXH_PUBLIC_API XXH128_hash_t
-XXH3_128bits_withSecret(const void* input, size_t len, const void* secret, size_t secretSize)
-{
- return XXH3_128bits_internal(input, len, 0,
- (const xxh_u8*)secret, secretSize,
- XXH3_hashLong_128b_withSecret);
-}
-
-XXH_PUBLIC_API XXH128_hash_t
-XXH3_128bits_withSeed(const void* input, size_t len, XXH64_hash_t seed)
-{
- return XXH3_128bits_internal(input, len, seed,
- XXH3_kSecret, sizeof(XXH3_kSecret),
- XXH3_hashLong_128b_withSeed);
-}
-
-XXH_PUBLIC_API XXH128_hash_t
-XXH128(const void* input, size_t len, XXH64_hash_t seed)
-{
- return XXH3_128bits_withSeed(input, len, seed);
-}
-
-
-/* === XXH3 128-bit streaming === */
-
-/*
- * All the functions are actually the same as for 64-bit streaming variant.
- * The only difference is the finalizatiom routine.
- */
-
-static void
-XXH3_128bits_reset_internal(XXH3_state_t* statePtr,
- XXH64_hash_t seed,
- const void* secret, size_t secretSize)
-{
- XXH3_64bits_reset_internal(statePtr, seed, secret, secretSize);
-}
-
-XXH_PUBLIC_API XXH_errorcode
-XXH3_128bits_reset(XXH3_state_t* statePtr)
-{
- if (statePtr == NULL) return XXH_ERROR;
- XXH3_128bits_reset_internal(statePtr, 0, XXH3_kSecret, XXH_SECRET_DEFAULT_SIZE);
- return XXH_OK;
-}
-
-XXH_PUBLIC_API XXH_errorcode
-XXH3_128bits_reset_withSecret(XXH3_state_t* statePtr, const void* secret, size_t secretSize)
-{
- if (statePtr == NULL) return XXH_ERROR;
- XXH3_128bits_reset_internal(statePtr, 0, secret, secretSize);
- if (secret == NULL) return XXH_ERROR;
- if (secretSize < XXH3_SECRET_SIZE_MIN) return XXH_ERROR;
- return XXH_OK;
-}
-
-XXH_PUBLIC_API XXH_errorcode
-XXH3_128bits_reset_withSeed(XXH3_state_t* statePtr, XXH64_hash_t seed)
-{
- if (statePtr == NULL) return XXH_ERROR;
- if (seed==0) return XXH3_128bits_reset(statePtr);
- if (seed != statePtr->seed) XXH3_initCustomSecret(statePtr->customSecret, seed);
- XXH3_128bits_reset_internal(statePtr, seed, NULL, XXH_SECRET_DEFAULT_SIZE);
- return XXH_OK;
-}
-
-XXH_PUBLIC_API XXH_errorcode
-XXH3_128bits_update(XXH3_state_t* state, const void* input, size_t len)
-{
- return XXH3_update(state, (const xxh_u8*)input, len,
- XXH3_accumulate_512, XXH3_scrambleAcc);
-}
-
-XXH_PUBLIC_API XXH128_hash_t XXH3_128bits_digest (const XXH3_state_t* state)
-{
- const unsigned char* const secret = (state->extSecret == NULL) ? state->customSecret : state->extSecret;
- if (state->totalLen > XXH3_MIDSIZE_MAX) {
- XXH_ALIGN(XXH_ACC_ALIGN) XXH64_hash_t acc[XXH_ACC_NB];
- XXH3_digest_long(acc, state, secret);
- XXH_ASSERT(state->secretLimit + XXH_STRIPE_LEN >= sizeof(acc) + XXH_SECRET_MERGEACCS_START);
- { XXH128_hash_t h128;
- h128.low64 = XXH3_mergeAccs(acc,
- secret + XXH_SECRET_MERGEACCS_START,
- (xxh_u64)state->totalLen * XXH_PRIME64_1);
- h128.high64 = XXH3_mergeAccs(acc,
- secret + state->secretLimit + XXH_STRIPE_LEN
- - sizeof(acc) - XXH_SECRET_MERGEACCS_START,
- ~((xxh_u64)state->totalLen * XXH_PRIME64_2));
- return h128;
- }
- }
- /* len <= XXH3_MIDSIZE_MAX : short code */
- if (state->seed)
- return XXH3_128bits_withSeed(state->buffer, (size_t)state->totalLen, state->seed);
- return XXH3_128bits_withSecret(state->buffer, (size_t)(state->totalLen),
- secret, state->secretLimit + XXH_STRIPE_LEN);
-}
-
-/* 128-bit utility functions */
-
-#include <string.h> /* memcmp, memcpy */
-
-/* return : 1 is equal, 0 if different */
-XXH_PUBLIC_API int XXH128_isEqual(XXH128_hash_t h1, XXH128_hash_t h2)
-{
- /* note : XXH128_hash_t is compact, it has no padding byte */
- return !(memcmp(&h1, &h2, sizeof(h1)));
-}
-
-/* This prototype is compatible with stdlib's qsort().
- * return : >0 if *h128_1 > *h128_2
- * <0 if *h128_1 < *h128_2
- * =0 if *h128_1 == *h128_2 */
-XXH_PUBLIC_API int XXH128_cmp(const void* h128_1, const void* h128_2)
-{
- XXH128_hash_t const h1 = *(const XXH128_hash_t*)h128_1;
- XXH128_hash_t const h2 = *(const XXH128_hash_t*)h128_2;
- int const hcmp = (h1.high64 > h2.high64) - (h2.high64 > h1.high64);
- /* note : bets that, in most cases, hash values are different */
- if (hcmp) return hcmp;
- return (h1.low64 > h2.low64) - (h2.low64 > h1.low64);
-}
-
-
-/*====== Canonical representation ======*/
-XXH_PUBLIC_API void
-XXH128_canonicalFromHash(XXH128_canonical_t* dst, XXH128_hash_t hash)
-{
- XXH_STATIC_ASSERT(sizeof(XXH128_canonical_t) == sizeof(XXH128_hash_t));
- if (XXH_CPU_LITTLE_ENDIAN) {
- hash.high64 = XXH_swap64(hash.high64);
- hash.low64 = XXH_swap64(hash.low64);
- }
- memcpy(dst, &hash.high64, sizeof(hash.high64));
- memcpy((char*)dst + sizeof(hash.high64), &hash.low64, sizeof(hash.low64));
-}
-
-XXH_PUBLIC_API XXH128_hash_t
-XXH128_hashFromCanonical(const XXH128_canonical_t* src)
-{
- XXH128_hash_t h;
- h.high64 = XXH_readBE64(src);
- h.low64 = XXH_readBE64(src->digest + 8);
- return h;
-}
-
-/* Pop our optimization override from above */
-#if XXH_VECTOR == XXH_AVX2 /* AVX2 */ \
- && defined(__GNUC__) && !defined(__clang__) /* GCC, not Clang */ \
- && defined(__OPTIMIZE__) && !defined(__OPTIMIZE_SIZE__) /* respect -O0 and -Os */
-# pragma GCC pop_options
-#endif
-
-#endif /* XXH_NO_LONG_LONG */
-
-
-#endif /* XXH_IMPLEMENTATION */
-
-
-#if defined (__cplusplus)
-}
-#endif
--
2.29.2
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