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Flash uses 16.16 fixed point math. Fixed math operations and defines are in the (flash root)/fixed.h file.

If FIXEDUSEFLOAT is NOT defined, (flash root)/(platform directory)/Fixed.h is included by the fixed point code. Multiplication and division of 16.16 fixed point numbers can be defined here as a performance optimization. Plenty of examples are given. If you have a 64 bit type, implementing Fixed is near trivial - set up the HAVE64BIT and S64 defines. Other (assembly) examples for your perusal are included.

Version 1.0 of the Flash 4 Porting SDK                        Middlesoft, Inc.