From a632c00b0d023b8a40d09839fbb2662da1cb5d37 Mon Sep 17 00:00:00 2001 From: van Hauser Date: Fri, 12 Jun 2020 16:08:49 +0200 Subject: switch to faster and better hash + random --- include/hash.h | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) (limited to 'include/hash.h') diff --git a/include/hash.h b/include/hash.h index cec51eac..09dabb59 100644 --- a/include/hash.h +++ b/include/hash.h @@ -30,9 +30,16 @@ #include "types.h" -#ifdef __x86_64__ +u32 hash32(const void *key, u32 len, u32 seed); +u64 hash64(const void *key, u32 len, u64 seed); - #define ROL64(_x, _r) ((((u64)(_x)) << (_r)) | (((u64)(_x)) >> (64 - (_r)))) +#if 0 + +The following code is disabled because xxh3 with a 32 bit resukt is 30% faster + + #ifdef __x86_64__ + + #define ROL64(_x, _r) ((((u64)(_x)) << (_r)) | (((u64)(_x)) >> (64 - (_r)))) static inline u32 hash32(const void *key, u32 len, u32 seed) { @@ -65,9 +72,9 @@ static inline u32 hash32(const void *key, u32 len, u32 seed) { } -#else + #else - #define ROL32(_x, _r) ((((u32)(_x)) << (_r)) | (((u32)(_x)) >> (32 - (_r)))) + #define ROL32(_x, _r) ((((u32)(_x)) << (_r)) | (((u32)(_x)) >> (32 - (_r)))) static inline u32 hash32(const void *key, u32 len, u32 seed) { @@ -100,7 +107,8 @@ static inline u32 hash32(const void *key, u32 len, u32 seed) { } -#endif /* ^__x86_64__ */ + #endif /* ^__x86_64__ */ +#endif #endif /* !_HAVE_HASH_H */ -- cgit 1.4.1