[fpc-pascal] Bit manipulation helpers

[Ryan Joseph]

I tried to use the bit helpers like https://www.freepascal.org/docs-html/rtl/sysutils/twordhelper.testbit.html but the bit to test is  0..15. I expected this to work like https://wiki.freepascal.org/Bit_manipulation but that doesn't seem to be the case. 

Does there exist bit helpers like GetBit (from the last link) in the RTL?

Regards,
	Ryan Joseph