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freedreno: replace fnv1a hash function with xxhash 

xxhash is faster than fnv1a in almost all circumstances, so we're
switching to it globally.

Signed-off-by: Dmytro Nester <dmytro.nester@globallogic.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4020>
This commit is contained in:
Dmitriy Nester 2020-02-27 15:27:17 +02:00 committed by Marge Bot
parent 0e9af02323
commit edd62619a1
3 changed files with 9 additions and 9 deletions
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4
src/gallium/drivers/freedreno/a6xx/fd6_texture.c
View File

@ -359,9 +359,7 @@ static uint32_t
key_hash(const void *_key)
{
const struct fd6_texture_key *key = _key;
uint32_t hash = _mesa_fnv32_1a_offset_bias;
hash = _mesa_fnv32_1a_accumulate_block(hash, key, sizeof(*key));
return hash;
return XXH32(key, sizeof(*key), 0);
}
static bool

8
src/gallium/drivers/freedreno/freedreno_batch_cache.c
View File

@ -28,6 +28,8 @@
#include "util/set.h"
#include "util/list.h"
#include "util/u_string.h"
#define XXH_INLINE_ALL
#include "util/xxhash.h"
#include "freedreno_batch.h"
#include "freedreno_batch_cache.h"
@ -98,9 +100,9 @@ static uint32_t
key_hash(const void *_key)
{
const struct key *key = _key;
uint32_t hash = _mesa_fnv32_1a_offset_bias;
hash = _mesa_fnv32_1a_accumulate_block(hash, key, offsetof(struct key, surf[0]));
hash = _mesa_fnv32_1a_accumulate_block(hash, key->surf, sizeof(key->surf[0]) * key->num_surfs);
uint32_t hash = 0;
hash = XXH32(key, offsetof(struct key, surf[0]), hash);
hash = XXH32(key->surf, sizeof(key->surf[0]) * key->num_surfs , hash);
return hash;
}

6
src/gallium/drivers/freedreno/ir3/ir3_cache.c
View File

@ -26,6 +26,8 @@
#include "util/ralloc.h"
#include "util/hash_table.h"
#define XXH_INLINE_ALL
#include "util/xxhash.h"
#include "ir3_cache.h"
#include "ir3_gallium.h"
@ -35,9 +37,7 @@ static uint32_t
key_hash(const void *_key)
{
const struct ir3_cache_key *key = _key;
uint32_t hash = _mesa_fnv32_1a_offset_bias;
hash = _mesa_fnv32_1a_accumulate_block(hash, key, sizeof(*key));
return hash;
return XXH32(key, sizeof(*key), 0);
}
static bool