From: Tom Cosgrove <tom.cosgrove@arm.com>
Date: Thu, 30 Oct 2025 11:01:33 +0000 (+0000)
Subject: Enable AES and SHA3 optimisations on Apple Silicon M5-based macOS systems
X-Git-Tag: 4.0-PRE-CLANG-FORMAT-WEBKIT~162
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9b810d9256b3adbf558517f4fd7ee2d2c5464746;p=thirdparty%2Fopenssl.git

Enable AES and SHA3 optimisations on Apple Silicon M5-based macOS systems

ARMV8_UNROLL8_EOR3 gives a performance improvement of 6-35%.

ARMV8_HAVE_SHA3_AND_WORTH_USING gives 3-4% improvement.

Still no performance gain from ARMV8_UNROLL12_EOR3.

Change-Id: I692ad5711e7ff728cd59baba64830cd3f69c3687

Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Norbert Pocs <norbertp@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/29053)
---

diff --git a/crypto/armcap.c b/crypto/armcap.c
index afbfb377dd8..7eeea93bd11 100644
--- a/crypto/armcap.c
+++ b/crypto/armcap.c
@@ -297,7 +297,8 @@ void OPENSSL_cpuid_setup(void)
                ((strncmp(uarch, "Apple M1", 8) == 0) ||
                 (strncmp(uarch, "Apple M2", 8) == 0) ||
                 (strncmp(uarch, "Apple M3", 8) == 0) ||
-                (strncmp(uarch, "Apple M4", 8) == 0))) {
+                (strncmp(uarch, "Apple M4", 8) == 0) ||
+                (strncmp(uarch, "Apple M5", 8) == 0))) {
                 OPENSSL_armcap_P |= ARMV8_UNROLL8_EOR3;
                 OPENSSL_armcap_P |= ARMV8_HAVE_SHA3_AND_WORTH_USING;
             }