From c352a9ab022b945307f1ad5d35575f695a13c2ca Mon Sep 17 00:00:00 2001
From: Brad Smith <brad@comstyle.com>
Date: Thu, 5 Feb 2026 22:32:36 -0500
Subject: [PATCH] avutil/cpu: add CPU feature detection for AArch64 CRC32 on
 OpenBSD

Signed-off-by: Brad Smith <brad@comstyle.com>
---
 libavutil/aarch64/cpu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavutil/aarch64/cpu.c b/libavutil/aarch64/cpu.c
index 6733b62123..ab297595d6 100644
--- a/libavutil/aarch64/cpu.c
+++ b/libavutil/aarch64/cpu.c
@@ -103,6 +103,8 @@ static int detect_flags(void)
     if (sysctl(mib, 2, &isar0, &len, NULL, 0) != -1) {
         if (ID_AA64ISAR0_DP(isar0) >= ID_AA64ISAR0_DP_IMPL)
             flags |= AV_CPU_FLAG_DOTPROD;
+        if (ID_AA64ISAR0_CRC32(isar0) >= ID_AA64ISAR0_CRC32_BASE)
+            flags |= AV_CPU_FLAG_ARM_CRC;
     }
 
     mib[0] = CTL_MACHDEP;