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author | Jussi Kivilinna <jussi.kivilinna@iki.fi> | 2015-05-03 00:34:34 +0300 |
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committer | Jussi Kivilinna <jussi.kivilinna@iki.fi> | 2015-05-03 00:34:34 +0300 |
commit | 06e122baa3321483a47bbf82fd2a4540becfa0c9 (patch) | |
tree | ca6b74c0a96bcf48b7f7b0e1e44cc21af80d6965 /m4 | |
parent | 66129b3334a5aa54ff8a97981507e4704f759571 (diff) | |
download | libgcrypt-06e122baa3321483a47bbf82fd2a4540becfa0c9.tar.gz |
More optimized CRC implementations
* cipher/crc.c (crc32_table, crc24_table): Replace with new table
contents.
(update_crc32, CRC24_INIT, CRC24_POLY): Remove.
(crc32_next, crc32_next4, crc24_init, crc24_next, crc24_next4)
(crc24_final): New.
(crc24rfc2440_init): Use crc24_init.
(crc32_write): Rewrite to use crc32_next & crc32_next4.
(crc24_write): Rewrite to use crc24_next & crc24_next4.
(crc32_final, crc32rfc1510_final): Use buf_put_be32.
(crc24rfc2440_final): Use crc24_final & buf_put_le32.
* tests/basic.c (check_digests): Add CRC "123456789" tests.
--
Patch adds more optimized CRC implementations generated with universal_crc
tool by Danjel McGougan: http://www.mcgougan.se/universal_crc/
Benchmark on Intel Haswell (no-turbo, 3200 Mhz):
Before:
CRC32 | 2.52 ns/B 378.3 MiB/s 8.07 c/B
CRC32RFC1510 | 2.52 ns/B 378.1 MiB/s 8.07 c/B
CRC24RFC2440 | 46.62 ns/B 20.46 MiB/s 149.2 c/B
After:
CRC32 | 0.918 ns/B 1039.3 MiB/s 2.94 c/B
CRC32RFC1510 | 0.918 ns/B 1039.0 MiB/s 2.94 c/B
CRC24RFC2440 | 0.918 ns/B 1039.4 MiB/s 2.94 c/B
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Diffstat (limited to 'm4')
0 files changed, 0 insertions, 0 deletions