Add Intel PCLMUL implementations of CRC algorithms

* cipher/Makefile.am: Add 'crc-intel-pclmul.c'.
* cipher/crc-intel-pclmul.c: New.
* cipher/crc.c (USE_INTEL_PCLMUL): New macro.
(CRC_CONTEXT) [USE_INTEL_PCLMUL]: Add 'use_pclmul'.
[USE_INTEL_PCLMUL] (_gcry_crc32_intel_pclmul)
(gcry_crc24rfc2440_intel_pclmul): New.
(crc32_init, crc32rfc1510_init, crc24rfc2440_init)
[USE_INTEL_PCLMUL]: Select PCLMUL implementation if SSE4.1 and PCLMUL
HW features detected.
(crc32_write, crc24rfc2440_write) [USE_INTEL_PCLMUL]: Use PCLMUL
implementation if enabled.
(crc24_init): Document storage format of 24-bit CRC.
(crc24_next4): Use only 'data' for last table look-up.
* configure.ac: Add 'crc-intel-pclmul.lo'.
* src/g10lib.h (HWF_*, HWF_INTEL_SSE4_1): Update HWF flags to include
Intel SSE4.1.
* src/hwf-x86.c (detect_x86_gnuc): Add SSE4.1 detection.
* src/hwfeatures.c (hwflist): Add 'intel-sse4.1'.
* tests/basic.c (fillbuf_count): New.
(check_one_md): Add "?" check (million byte data-set with byte pattern
0x00,0x01,0x02,...); Test all buffer sizes 1 to 1000, for "!" and "?"
checks.
(check_one_md_multi): Skip "?".
(check_digests): Add "?" test-vectors for MD5, SHA1, SHA224, SHA256,
SHA384, SHA512, SHA3_224, SHA3_256, SHA3_384, SHA3_512, RIPEMD160,
CRC32, CRC32_RFC1510, CRC24_RFC2440, TIGER1 and WHIRLPOOL; Add "!"
test-vectors for CRC32_RFC1510 and CRC24_RFC2440.
--

Add Intel PCLMUL accelerated implmentations of CRC algorithms.
CRC performance is improved ~11x on x86_64 and i386 on Intel
Haswell, and ~2.7x on Intel Sandy-bridge.

Benchmark on Intel Core i5-4570 (x86_64, 3.2 Ghz):

 Before:
                 |  nanosecs/byte   mebibytes/sec   cycles/byte
  CRC32          |     0.865 ns/B    1103.0 MiB/s      2.77 c/B
  CRC32RFC1510   |     0.865 ns/B    1102.7 MiB/s      2.77 c/B
  CRC24RFC2440   |     0.865 ns/B    1103.0 MiB/s      2.77 c/B

 After:
                 |  nanosecs/byte   mebibytes/sec   cycles/byte
  CRC32          |     0.079 ns/B   12051.7 MiB/s     0.253 c/B
  CRC32RFC1510   |     0.079 ns/B   12050.6 MiB/s     0.253 c/B
  CRC24RFC2440   |     0.079 ns/B   12100.0 MiB/s     0.252 c/B

Benchmark on Intel Core i5-4570 (i386, 3.2 Ghz):

 Before:
                 |  nanosecs/byte   mebibytes/sec   cycles/byte
  CRC32          |     0.860 ns/B    1109.0 MiB/s      2.75 c/B
  CRC32RFC1510   |     0.861 ns/B    1108.3 MiB/s      2.75 c/B
  CRC24RFC2440   |     0.860 ns/B    1108.6 MiB/s      2.75 c/B

 After:
                 |  nanosecs/byte   mebibytes/sec   cycles/byte
  CRC32          |     0.078 ns/B   12207.0 MiB/s     0.250 c/B
  CRC32RFC1510   |     0.078 ns/B   12207.0 MiB/s     0.250 c/B
  CRC24RFC2440   |     0.080 ns/B   11925.6 MiB/s     0.256 c/B

Benchmark on Intel Core i5-2450M (x86_64, 2.5 Ghz):

 Before:
                 |  nanosecs/byte   mebibytes/sec   cycles/byte
  CRC32          |      1.25 ns/B     762.3 MiB/s      3.13 c/B
  CRC32RFC1510   |      1.26 ns/B     759.1 MiB/s      3.14 c/B
  CRC24RFC2440   |      1.25 ns/B     764.9 MiB/s      3.12 c/B

 After:
                 |  nanosecs/byte   mebibytes/sec   cycles/byte
  CRC32          |     0.451 ns/B    2114.3 MiB/s      1.13 c/B
  CRC32RFC1510   |     0.451 ns/B    2114.6 MiB/s      1.13 c/B
  CRC24RFC2440   |     0.457 ns/B    2085.0 MiB/s      1.14 c/B

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>

1 files changed, 7 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
index 8b503609..ff72e3fd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2023,6 +2023,13 @@ LIST_MEMBER(crc, $enabled_digests)
 if test "$found" = "1" ; then
    GCRYPT_DIGESTS="$GCRYPT_DIGESTS crc.lo"
    AC_DEFINE(USE_CRC, 1, [Defined if this module should be included])
+
+   case "${host}" in
+      i?86-*-* | x86_64-*-*)
+         # Build with the assembly implementation
+         GCRYPT_DIGESTS="$GCRYPT_DIGESTS crc-intel-pclmul.lo"
+      ;;
+   esac
 fi
 
 LIST_MEMBER(gostr3411-94, $enabled_digests)