diff options
Diffstat (limited to 'src/mesa/drivers')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_program_cache.c | 16 |
1 files changed, 4 insertions, 12 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_program_cache.c b/src/mesa/drivers/dri/i965/brw_program_cache.c index 88bb19792b0..e4b321bcc4c 100644 --- a/src/mesa/drivers/dri/i965/brw_program_cache.c +++ b/src/mesa/drivers/dri/i965/brw_program_cache.c @@ -37,7 +37,7 @@ * data) in return. Objects in the cache may not have relocations * (pointers to other BOs) in them. * - * The inner workings are a simple hash table based on a CRC of the + * The inner workings are a simple hash table based on a FNV-1a of the * key data. * * Replacement is not implemented. Instead, when the cache gets too @@ -96,17 +96,9 @@ brw_stage_cache_id(gl_shader_stage stage) static GLuint hash_key(struct brw_cache_item *item) { - GLuint *ikey = (GLuint *)item->key; - GLuint hash = item->cache_id, i; - - assert(item->key_size % 4 == 0); - - /* I'm sure this can be improved on: - */ - for (i = 0; i < item->key_size/4; i++) { - hash ^= ikey[i]; - hash = (hash << 5) | (hash >> 27); - } + uint32_t hash = _mesa_fnv32_1a_offset_bias; + hash = _mesa_fnv32_1a_accumulate(hash, item->cache_id); + hash = _mesa_fnv32_1a_accumulate_block(hash, item->key, item->key_size); return hash; } |