From 60e347983bef90ce244123dec1ad270307ee7fc2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alex=20R=C3=B8nne=20Petersen?= <alex@alexrp.com>
Date: Mon, 3 Aug 2026 21:29:06 +0200
Subject: [PATCH] std.zig.system.x86: add hygon family CPU detection

---
 lib/std/zig/system/x86.zig | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/lib/std/zig/system/x86.zig b/lib/std/zig/system/x86.zig
index 22168aa7541a436b32fd3d47536a6939478a7a68..bf15522b9ff999c7b789d4e983148b6022d091d7 100644
--- a/lib/std/zig/system/x86.zig
+++ b/lib/std/zig/system/x86.zig
@@ -75,6 +75,7 @@ pub fn detectNativeCpuAndFeatures(arch: Target.Cpu.Arch, os: Target.Os, query: T
         if (switch (vendor) {
             0x756e6547 => detectIntelProcessor(&cpu, family, model, brand_id),
             0x68747541 => detectAmdProcessor(&cpu, family, model),
+            0x6f677948 => detectHygonProcessor(family, model),
             else => null,
         }) |m| b: {
             // Some hypervisors are evil liars and will operate in long mode while identifying as a
@@ -218,6 +219,19 @@ fn detectAmdProcessor(cpu: *const Target.Cpu, family: u32, model: u32) ?*const T
     };
 }
 
+fn detectHygonProcessor(family: u32, model: u32) ?*const Target.Cpu.Model {
+    return switch (family) {
+        24 => switch (model) {
+            4 => &Target.x86.cpu.c86_4g_m4,
+            6 => &Target.x86.cpu.c86_4g_m6,
+            7 => &Target.x86.cpu.c86_4g_m7,
+            8 => &Target.x86.cpu.c86_4g_m8,
+            else => null,
+        },
+        else => null,
+    };
+}
+
 fn detectNativeFeatures(cpu: *Target.Cpu, os_tag: Target.Os.Tag) void {
     var leaf = cpuid(0, 0);
 
-- 
2.54.0