From ac68e7f99996cf1f70884b262f9d02f0dd0519d1 Mon Sep 17 00:00:00 2001
From: James Zern <jzern@google.com>
Date: Tue, 17 Sep 2024 13:31:46 -0700
Subject: [PATCH] aarch64_cpudetect: detect SVE/SVE2 on Windows
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PF_ARM_SVE_INSTRUCTIONS_AVAILABLE and PF_ARM_SVE2_INSTRUCTIONS_AVAILABLE
are available in WinSDK 10.0.26100 and recent versions of mingw-w64.

Based on a patch by Martin Storsjö on ffmpeg-devel:
https://ffmpeg.org/pipermail/ffmpeg-devel/2024-September/333611.html

Change-Id: I34b2341a559f95aa400e84d709f3eb36da5dbb7b
---
 vpx_ports/aarch64_cpudetect.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/vpx_ports/aarch64_cpudetect.c b/vpx_ports/aarch64_cpudetect.c
index 4cc4891457d..df8e1e244d6 100644
--- a/vpx_ports/aarch64_cpudetect.c
+++ b/vpx_ports/aarch64_cpudetect.c
@@ -90,6 +90,23 @@ static int arm_get_cpu_caps(void) {
   }
 #endif  // defined(PF_ARM_SVE_I8MM_INSTRUCTIONS_AVAILABLE)
 #endif  // HAVE_NEON_I8MM
+#if HAVE_SVE
+// Support for PF_ARM_SVE_INSTRUCTIONS_AVAILABLE was added in Windows SDK 26100.
+#if defined(PF_ARM_SVE_INSTRUCTIONS_AVAILABLE)
+  if (IsProcessorFeaturePresent(PF_ARM_SVE_INSTRUCTIONS_AVAILABLE)) {
+    flags |= HAS_SVE;
+  }
+#endif  // defined(PF_ARM_SVE_INSTRUCTIONS_AVAILABLE)
+#endif  // HAVE_SVE
+#if HAVE_SVE2
+// Support for PF_ARM_SVE2_INSTRUCTIONS_AVAILABLE was added in Windows SDK
+// 26100.
+#if defined(PF_ARM_SVE2_INSTRUCTIONS_AVAILABLE)
+  if (IsProcessorFeaturePresent(PF_ARM_SVE2_INSTRUCTIONS_AVAILABLE)) {
+    flags |= HAS_SVE2;
+  }
+#endif  // defined(PF_ARM_SVE2_INSTRUCTIONS_AVAILABLE)
+#endif  // HAVE_SVE2
   return flags;
 }