From 4018c863e3b4b9857fe9378ae54e406a5cf5ab48 Mon Sep 17 00:00:00 2001
From: Luke Parker <10430890+Hona@users.noreply.github.com>
Date: Fri, 13 Feb 2026 07:50:43 +1000
Subject: fix: baseline CPU detection (#13371)

---
 install | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

(limited to 'install')

diff --git a/install b/install
index 22b7ca39e..b0716d532 100755
--- a/install
+++ b/install
@@ -130,7 +130,7 @@ else
     needs_baseline=false
     if [ "$arch" = "x64" ]; then
       if [ "$os" = "linux" ]; then
-        if ! grep -qi avx2 /proc/cpuinfo 2>/dev/null; then
+        if ! grep -qwi avx2 /proc/cpuinfo 2>/dev/null; then
           needs_baseline=true
         fi
       fi
@@ -141,6 +141,20 @@ else
           needs_baseline=true
         fi
       fi
+
+      if [ "$os" = "windows" ]; then
+        ps="(Add-Type -MemberDefinition \"[DllImport(\"\"kernel32.dll\"\")] public static extern bool IsProcessorFeaturePresent(int ProcessorFeature);\" -Name Kernel32 -Namespace Win32 -PassThru)::IsProcessorFeaturePresent(40)"
+        out=""
+        if command -v powershell.exe >/dev/null 2>&1; then
+          out=$(powershell.exe -NoProfile -NonInteractive -Command "$ps" 2>/dev/null || true)
+        elif command -v pwsh >/dev/null 2>&1; then
+          out=$(pwsh -NoProfile -NonInteractive -Command "$ps" 2>/dev/null || true)
+        fi
+        out=$(echo "$out" | tr -d '\r' | tr '[:upper:]' '[:lower:]' | tr -d '[:space:]')
+        if [ "$out" != "true" ] && [ "$out" != "1" ]; then
+          needs_baseline=true
+        fi
+      fi
     fi
 
     target="$os-$arch"
-- 
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