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(16-bit only) The compiler will generate in-line 80x87 numeric data
processor instructions into the object code for floating-point operations.
 An 8087 or compatible math coprocessor must be present at run-time.  If the
"2" option is used in conjunction with this option, the compiler will
generate 287 and upwards compatible instructions; otherwise, the compiler
will generate 8087 compatible instructions.
(32-bit only) The compiler will generate in-line 387-compatible numeric data
processor instructions into the object code for floating-point operations.
 When the "fpi87" option is used exclusively, coprocessor emulation software
is not included in the application when it is linked.  A 387 or compatible
math coprocessor must be present at run-time.

The macros __FPI__ and __SW_FPI87 will be predefined if "fpi87" is selected.
 See Note with description of "fpi" option.