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The compiler will generate in-line 80x87 numeric data processor instructions
into the object code for floating-point operations.  The sequence of
floating-point instructions will be optimized for greatest possible
performance on the Intel Pentium Pro processor.  For 16-bit applications,
the use of this option will limit the range of systems on which the
application will run but there are execution performance improvements.  Use
this option in conjunction with the "fpi" or "fpi87" options.  The macro
__SW_FP6 will be predefined if "fp6" is selected.