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X-Hacker.org- Watcom C/C++ User's Guide - the compiler will generate in-line 80x87 numeric data processor instructions
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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.
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