Fortran/C filter for gmp

[TPCnospam at mklab.ph.rhul.ac.uk]

This seems an obvious question but I can't find any mention in the list
archives or web/Usenet. Q: Are there any filter programs which will read
'standard' C or better still Fortran code and produce C O/P with the all
occurrences of at least the 4 basic arithmetic operators converted to gmp
functions calls? 

Thanks
Tom Crane.

-- 
Tom Crane, Dept. Physics, Royal Holloway, University of London, Egham Hill,
Egham, Surrey, TW20 0EX, England. 
Email:  T.Crane at rhul.ac.uk
Fax:    +44 (0) 1784 472794