From: Eric Biggers <ebiggers@kernel.org>
To: linux-crypto@vger.kernel.org
Cc: Ard Biesheuvel <ardb@kernel.org>,
"Jason A . Donenfeld" <Jason@zx2c4.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
x86@kernel.org, Eric Biggers <ebiggers@kernel.org>
Subject: [PATCH 0/2] lib/crypto: x86/sha512: Partially roll up loops
Date: Thu, 12 Nov 2026 00:28:37 -0800 [thread overview]
Message-ID: <20261112082839.414786-1-ebiggers@kernel.org> (raw)
Some freshly baked loop rolls in the SSSE3 and AVX optimized SHA-512
code.
In each file, SHA-512 rounds 14 through 77 are rolled up into 8 groups
of 8 rounds. This saves 20.2 KB of text. It's also likely to increase
performance on the CPUs that actually run this code (i.e., CPUs without
AVX2), due to the improved use of the cache, though the oldest I was
able to confirm that on is Haswell which has AVX2 anyway.
Eric Biggers (2):
lib/crypto: x86/sha512: Partially roll up sha512_transform_avx()
lib/crypto: x86/sha512: Partially roll up sha512_transform_ssse3()
lib/crypto/x86/sha512-avx-asm.S | 124 +++++++++++++++--------------
lib/crypto/x86/sha512-ssse3-asm.S | 126 ++++++++++++++++--------------
2 files changed, 135 insertions(+), 115 deletions(-)
base-commit: 33b4f31b1aea3f62b61c892daefc0e6a77859032
--
2.56.1
next reply other threads:[~2026-11-12 8:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-12 8:28 Eric Biggers [this message]
2026-11-12 8:28 ` [PATCH 1/2] lib/crypto: x86/sha512: Partially roll up sha512_transform_avx() Eric Biggers
2026-11-12 8:28 ` [PATCH 2/2] lib/crypto: x86/sha512: Partially roll up sha512_transform_ssse3() Eric Biggers
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