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1// SPDX-License-Identifier: GPL-2.02/* Copyright Amazon.com Inc. or its affiliates. */3 4#ifndef _TEST_SIPHASH_H5#define _TEST_SIPHASH_H6 7/* include/linux/bitops.h */8static inline u64 rol64(u64 word, unsigned int shift)9{10 return (word << (shift & 63)) | (word >> ((-shift) & 63));11}12 13/* include/linux/siphash.h */14#define SIPHASH_PERMUTATION(a, b, c, d) ( \15 (a) += (b), (b) = rol64((b), 13), (b) ^= (a), (a) = rol64((a), 32), \16 (c) += (d), (d) = rol64((d), 16), (d) ^= (c), \17 (a) += (d), (d) = rol64((d), 21), (d) ^= (a), \18 (c) += (b), (b) = rol64((b), 17), (b) ^= (c), (c) = rol64((c), 32))19 20#define SIPHASH_CONST_0 0x736f6d6570736575ULL21#define SIPHASH_CONST_1 0x646f72616e646f6dULL22#define SIPHASH_CONST_2 0x6c7967656e657261ULL23#define SIPHASH_CONST_3 0x7465646279746573ULL24 25/* lib/siphash.c */26#define SIPROUND SIPHASH_PERMUTATION(v0, v1, v2, v3)27 28#define PREAMBLE(len) \29 u64 v0 = SIPHASH_CONST_0; \30 u64 v1 = SIPHASH_CONST_1; \31 u64 v2 = SIPHASH_CONST_2; \32 u64 v3 = SIPHASH_CONST_3; \33 u64 b = ((u64)(len)) << 56; \34 v3 ^= key->key[1]; \35 v2 ^= key->key[0]; \36 v1 ^= key->key[1]; \37 v0 ^= key->key[0];38 39#define POSTAMBLE \40 v3 ^= b; \41 SIPROUND; \42 SIPROUND; \43 v0 ^= b; \44 v2 ^= 0xff; \45 SIPROUND; \46 SIPROUND; \47 SIPROUND; \48 SIPROUND; \49 return (v0 ^ v1) ^ (v2 ^ v3);50 51static inline u64 siphash_2u64(const u64 first, const u64 second, const siphash_key_t *key)52{53 PREAMBLE(16)54 v3 ^= first;55 SIPROUND;56 SIPROUND;57 v0 ^= first;58 v3 ^= second;59 SIPROUND;60 SIPROUND;61 v0 ^= second;62 POSTAMBLE63}64#endif65