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CPU_FDIVBugPresent

Unit:SDL_cpuid
Class: none
Declaration: function CPU_FDIVBugPresent: Boolean;

Intel Pentium chips manufactured before a certain date (approx. end of 1994) have a bug in their floating point processor which returns less than full precision results for some combinations of divisor and dividend when performing a floating point division (FDIV). A well known operation which exhibits this phenomenon is 4195835/3145727.

The function CPU_FDIVBugPresent tests the CPU for the FDIV bug and returns TRUE íf the bug has been detected.

Last Update: 2023-Feb-06