Everytime I look in the compiler settings, the same question comes into my mind: Why does the current compiler of Delphi still have the "Pentium-safe FDIV" compiler option?
The Pentium-FDIV-Bug was found in November 1994 and did not occur in CPU models of 1995. Processors at this time were probably only strong enough work with Windows 95, 98 and maybe also Me. As far as I know, the first Intel Pentium 1 CPU with 133 MHz (and therefore fast enough to reach the minimum system requirements of Windows 2000) was released in June 1995, without FDIV bug, of course.
The VCL/RTL of current Delphi versions makes use of Windows APIs which are not available in ancient Operating Systems. Windows 98 and Me do not work with an empty Delphi XE6 VCL application; I didn't check if the VCL/RTL of Delphi XE6 has already broken Windows 2000 compatibility, but I think so.
So, why does Embarcadero keep a compiler switch which was used in 1994, when they drop support for Operating Systems which were used in year 2000? Ergo, nobody will require this compile option, since the affected CPUs won't be compatible with the Operating Systems the VCL/RTL requires anyway.
Update; To clarify the question: Is there any use-case where this switch might be useful? Or maybe the compiler internally ignores the option, and it is just there to preserve the options for old project files?