ACTION: create an assembly code macro for the FPU (metatype -17)
USE: to create floating point maths functions
deff sine fsin

REMARKS: Deff macros make use of the FPU. All float functions are defined this way.
These are non-recursive macros and take no macro arguments. The expression parser is FPU-
aware and takes care of passing parameters onto the FPU stack.

RELATED: macros def #define macro sin cos