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The compiler will generate in-line 80x87 numeric data processor instructions
into the object code for floating-point operations.  For Watcom compilers
generating 16-bit code, this option is the default.  For 32-bit
applications, use this option if you wish to support those few 386 systems
that are equipped with a 287 numeric data processor ("fp3" is the default
for Watcom compilers generating 32-bit code).  However, for 32-bit
applications, the use of this option will reduce execution performance.  Use
this option in conjunction with the "fpi" or "fpi87" options.  The macro
__SW_FP2 will be predefined if "fp2" is selected.