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Author SHA1 Message Date
Grazvydas Ignotas
6acf22a179 util: use faster zlib's CRC32 implementaion 
zlib provides a faster slice-by-4 CRC32 implementation than the
traditional single byte lookup one used by mesa. As most supported
platforms now link zlib unconditionally, we can easily use it.

Improvement for a 1MB buffer (avg MB/s, n=100, zlib 1.2.8):

  i5-6600K                    C2D E4500
mesa zlib                    mesa zlib
 443 1443 225% +/- 2.1%       403 1175 191% +/- 0.9%

It has been verified the calculation results stay the same after this
change.

Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
 2018-01-14 19:10:33 +02:00
Grazvydas Ignotas
b7347cc313 util/crc32: don't drop the const qualifier 
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
 2018-01-14 18:47:50 +02:00
Marek Olšák
86514d84e0 util: import CRC32 implementation from gallium 
Reviewed-by: Timothy Arceri <timothy.arceri@collabora.com>
 2016-11-22 18:05:51 +01:00
Renamed from src/gallium/auxiliary/util/u_hash.c (Browse further)