>>
I need a set of routines for doing some floating point math on the 18C or
18F chips.
I did some searches on the microchip web site and found some for the 17x and
16x chips
Will the 17x work?
<<

Not without modification.  The instruction sets have great similarities, but
are not the same.

Is this a funded project?  We have a nice 24 bit floating point library for
the 16 family that includes float, fix, add, subtract, multiply, and divide.
Unlike the Microchip routines, these are carefully documented line by line.
The library has not yet been implemented on the 18 family, but we need to do
that soon anyway.  The hardware multiplier and other nice features like add
with carry will make them more efficient.  We don't give these routines away
for free, so contact me privately if you are interested.  We'd be happy to
create customizations as you require (32 bit, SQRT, ?).


*****************************************************************
Embed Inc, embedded system specialists in Littleton Massachusetts
(978) 742-9014, http://www.embedinc.com

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.