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|Floating point arithmetic precision|
SWI-Prolog represents floats using the C
double type. On
virtually all modern hardware this implies it uses 64-bit IEEE 754
floating point numbers. See also section
18.104.22.168. All floating point arithmetic is performed using C.
Different C compilers, different C math libraries and different hardware
floating point support may yield different results for the same
expression on different instances of SWI-Prolog.