In case anyone is in the market for a set of math subroutines for the 
18F452 (and presumably other members of that family) there is a set 
available for download at www.picbook.com.  This is the site for the 
Peatman book on programming the 18F452, and in the book he explains that 
the subroutines were developed by Microchip, put into a form for use by 
the MCC18 compiler, and are available for download with the free 
(student) version of that compiler.   What Peatman has done (or, to be 
more accurate, what one of the people working with him has done) is to 
modify those MCC18 subroutines for standalone use in assembly code.

I know that there are math subroutines available at other places, and 
have no earthly idea how these stack up against them.  So this is just 
FYI.  :-)

John
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