reference: https://gitlab.com/freepascal.org/fpc/source/-/issues/39268 [20220114-1-patch-setbitpos.diff](/uploads/33f351d322273c1149012f9ba32c45aa/20220114-1-patch-setbitpos.diff) [20220114-2-patch-doc.diff](/uploads/f4c3efad427b28cfb758d962f7e0428a/20220114-2-patch-doc.diff) [20220120-3-examples.zip](/uploads/cf21e96abdca0a4cfb5e9e3c1c054011/20220120-3-examples.zip) **20220114-1-patch-setbitpos.diff** is a source code fix for HighestSetBitPos() and LowestSetBitPos() so that result is negative (-1) instead of 255 when there are no bits set at all. **20220114-2-patch-doc.diff** is a sysutils.xml documentation fix for HighestSetBitPos() and LowestSetBitPos(). **20220120-3-examples.zip** are 2 examples that should be included in fpcsrc\packages\rtl-objpas package.