From d77f4adf04f2878853d0919f908d1b110f3c94f2 Mon Sep 17 00:00:00 2001
From: Daniel Schadt <kingdread@gmx.de>
Date: Thu, 10 Apr 2025 19:34:07 +0200
Subject: implement aes4 and aes10 with native instructions

Even though aes::hazmat::cipher_round uses aes-ni instructions under the
hood, simply loading the data (and the keys!) takes a significant amount
of time. Sadly, there's no way that aes exposes that lets you re-use the
"loaded" keys.

By implementing aes4/aes10 directly with _mm_aesenc, we can keep the
keys properly aligned.

We still keep the software backend as fallback, using the software
implementation of the aes crate.

This gives a ~70% speedup.
---
 Cargo.lock | 1 +
 1 file changed, 1 insertion(+)

(limited to 'Cargo.lock')

diff --git a/Cargo.lock b/Cargo.lock
index f2ea361..81985e0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -723,6 +723,7 @@ dependencies = [
  "aes",
  "blake2",
  "constant_time_eq",
+ "cpufeatures",
  "criterion",
  "hex",
 ]
-- 
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