poly1305: add AVX512 implementation

* LICENSES: Add 3-clause BSD license for poly1305-amd64-avx512.S.
* cipher/Makefile.am: Add 'poly1305-amd64-avx512.S'.
* cipher/poly1305-amd64-avx512.S: New.
* cipher/poly1305-internal.h (POLY1305_USE_AVX512): New.
(poly1305_context_s): Add 'use_avx512'.
* cipher/poly1305.c (ASM_FUNC_ABI, ASM_FUNC_WRAPPER_ATTR): New.
[POLY1305_USE_AVX512] (_gcry_poly1305_amd64_avx512_blocks)
(poly1305_amd64_avx512_blocks): New.
(poly1305_init): Use AVX512 is HW feature available (set use_avx512).
[USE_MPI_64BIT] (poly1305_blocks): Rename to ...
[USE_MPI_64BIT] (poly1305_blocks_generic): ... this.
[USE_MPI_64BIT] (poly1305_blocks): New.
--

Patch adds AMD64 AVX512-FMA52 implementation for Poly1305.

Benchmark on Intel Core i3-1115G4 (tigerlake):

 Before:
                    |  nanosecs/byte   mebibytes/sec   cycles/byte  auto Mhz
 POLY1305           |     0.306 ns/B      3117 MiB/s      1.25 c/B      4090

 After (5.0x faster):
                    |  nanosecs/byte   mebibytes/sec   cycles/byte  auto Mhz
 POLY1305           |     0.061 ns/B     15699 MiB/s     0.249 c/B      4095±3

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

1 files changed, 30 insertions, 0 deletions

diff --git a/LICENSES b/LICENSES
index 94499501..67b80e64 100644
--- a/LICENSES
+++ b/LICENSES
@@ -57,6 +57,36 @@ with any binary distributions derived from the GNU C Library.
 #+end_quote
 
   For files:
+  - cipher/poly1305-amd64-avx512.S
+
+#+begin_quote
+   Copyright (c) 2021-2022, Intel Corporation
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions are met:
+
+       * Redistributions of source code must retain the above copyright notice,
+         this list of conditions and the following disclaimer.
+       * Redistributions in binary form must reproduce the above copyright
+         notice, this list of conditions and the following disclaimer in the
+         documentation and/or other materials provided with the distribution.
+       * Neither the name of Intel Corporation nor the names of its contributors
+         may be used to endorse or promote products derived from this software
+         without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+   DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+   FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+   CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+   OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#+end_quote
+
+  For files:
   - random/jitterentropy-base.c
   - random/jitterentropy-gcd.c
   - random/jitterentropy-gcd.h