[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
2026-08-26 19:33:31 +00:00 · 2026-01-29 22:30:34 +00:00
parent 8c9039bbd4
commit 0203d1778a
1 changed files with 1 additions and 1 deletions
@@ -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