1. IEEE Floating Point Standard mathematics> IEEE 754 "IEEE Standard for Binary Floating-Point Arithmetic ANSI/IEEE Std 754-1985" or IEC 559: "Binary floating-point arithmetic for microprocessor systems". A standard, used by many CPUs and FPUs, which defines formats for representing floating-point numbers; representations of special values e. g. infinity, very small values, NaN; five exceptions, when they occur, and what happens when they do occur; four rounding modes; and a set of floating-point operations that will work identically on any conforming system. IEEE 754 specifies formats for representing floating-point values: single-precision 32-bit is required, double-precision 64-bit is optional. The standard also mentions that some implementations may include single-extended precision 80-bit and double-extended precision 128-bit formats. [On-line document?]
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