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| author | Mattias Andrée <maandree@kth.se> | 2022-01-21 18:29:26 +0100 |
|---|---|---|
| committer | Mattias Andrée <maandree@kth.se> | 2022-01-21 18:29:26 +0100 |
| commit | 839a3d17d257e73be9bc99dfa90e56c0824050ba (patch) | |
| tree | 6bb010351447edbb0ae8d910948b01837d2de9e5 /libblake_internal_blake2b_compress.c | |
| parent | Fix memory corruption bug in test.c and simplify message byte-length calculation (diff) | |
| download | libblake-839a3d17d257e73be9bc99dfa90e56c0824050ba.tar.gz libblake-839a3d17d257e73be9bc99dfa90e56c0824050ba.tar.bz2 libblake-839a3d17d257e73be9bc99dfa90e56c0824050ba.tar.xz | |
Initial work on optimising compression function; mm128 version is slower, mm256 version is barely faster
Signed-off-by: Mattias Andrée <maandree@kth.se>
Diffstat (limited to 'libblake_internal_blake2b_compress.c')
| -rw-r--r-- | libblake_internal_blake2b_compress.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libblake_internal_blake2b_compress.c b/libblake_internal_blake2b_compress.c index e844180..d04a469 100644 --- a/libblake_internal_blake2b_compress.c +++ b/libblake_internal_blake2b_compress.c @@ -1,9 +1,12 @@ /* See LICENSE file for copyright and license details. */ #include "common.h" +/* This code performs suboptimally if compiled with -mavx2 */ + static uint_least64_t decode_uint64_le(const unsigned char *data) { + /* This is perfectly optimised by the compiler */ return (((uint_least64_t)(data[0] & 255)) << 0) | (((uint_least64_t)(data[1] & 255)) << 8) | (((uint_least64_t)(data[2] & 255)) << 16) | @@ -17,6 +20,7 @@ decode_uint64_le(const unsigned char *data) static uint_least64_t rotate_right(uint_least64_t x, int n) { + /* This is perfectly optimised by the compiler */ return ((x >> n) | (x << (64 - n))) & UINT_LEAST64_C(0xFFFFffffFFFFffff); } |