From 0203d1778ac4f7c73d6e390924f080615297d9cc Mon Sep 17 00:00:00 2001
From: Justin Miller <justin.miller@reactos.org>
Date: Thu, 29 Jan 2026 14:30:34 -0800
Subject: [PATCH] [WINED3D] FFS has to return correct values on both msvc and
 gcc (#8625)

accordingly to
https://www.man7.org/linux/man-pages/man3/ffs.3.html
we have been doing this wrong for awhile and it causes opengl to freeze
---
 sdk/include/wine/port.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sdk/include/wine/port.h b/sdk/include/wine/port.h
index a10d6c53b43..58276e6ddaa 100644
--- a/sdk/include/wine/port.h
+++ b/sdk/include/wine/port.h
@@ -354,7 +354,7 @@ ffs(int mask)
 {
     long index;
     if (_BitScanForward(&index, mask) == 0) return 0;
-    return index;
+    return index + 1;
 }
 #else
 #define ffs __builtin_ffs