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switch to faster and better hash + random

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This commit is contained in:
van Hauser
2020-06-12 16:08:49 +02:00
parent db2e04361d
commit a632c00b0d
18 changed files with 5850 additions and 62 deletions
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18
include/hash.h
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@ -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 */