From e74b6f0a4bb86d5186ccc47ffd096f2ebfb29bc1 Mon Sep 17 00:00:00 2001
From: Jakub Konka <kubkon@jakubkonka.com>
Date: Fri, 25 Nov 2022 20:09:21 +0100
Subject: [PATCH] windows: detect couple more aarch64 CPU features

---
 lib/std/os/windows.zig         | 4 ++++
 lib/std/zig/system/windows.zig | 9 +++++++++
 2 files changed, 13 insertions(+)

diff --git a/lib/std/os/windows.zig b/lib/std/os/windows.zig
index 5308a6fae27cd8591c9e6396963b6be1b145ab87..b6d61e324e7b2f42d5412608d95d91e3e5c05619 100644
--- a/lib/std/os/windows.zig
+++ b/lib/std/os/windows.zig
@@ -3838,7 +3838,11 @@ pub const PF = enum(DWORD) {
     AVX512F_INSTRUCTIONS_AVAILABLE = 41,
 
     ERMS_AVAILABLE = 42,
+
+    /// This ARM processor implements the ARM v8.2 Dot Product (DP) instructions.
     ARM_V82_DP_INSTRUCTIONS_AVAILABLE = 43,
+
+    /// This ARM processor implements the ARM v8.3 JavaScript conversion (JSCVT) instructions.
     ARM_V83_JSCVT_INSTRUCTIONS_AVAILABLE = 44,
 };
 
diff --git a/lib/std/zig/system/windows.zig b/lib/std/zig/system/windows.zig
index eb6206812092332172b18e187be340e92f0ed171..569daf0a3084eb31a55e5600f3df5afdfe6e698d 100644
--- a/lib/std/zig/system/windows.zig
+++ b/lib/std/zig/system/windows.zig
@@ -61,6 +61,15 @@ fn detectNativeCpuAndFeaturesArm64() Target.Cpu {
     if (IsProcessorFeaturePresent(PF.ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE)) {
         cpu.features.addFeature(@enumToInt(Feature.crypto));
     }
+    if (IsProcessorFeaturePresent(PF.ARM_V81_ATOMIC_INSTRUCTIONS_AVAILABLE)) {
+        cpu.features.addFeature(@enumToInt(Feature.lse));
+    }
+    if (IsProcessorFeaturePresent(PF.ARM_V82_DP_INSTRUCTIONS_AVAILABLE)) {
+        cpu.features.addFeature(@enumToInt(Feature.dotprod));
+    }
+    if (IsProcessorFeaturePresent(PF.ARM_V83_JSCVT_INSTRUCTIONS_AVAILABLE)) {
+        cpu.features.addFeature(@enumToInt(Feature.jsconv));
+    }
 
     return cpu;
 }
-- 
2.54.0