IEC 559 ==>
IEEE Floating Point Standard
<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?]
(2003-06-17)
Nearby terms:
IEEE 802.4 « IEEE 802.5 « IEEE Computer Society «
IEEE Floating Point Standard » IEEE Standard
1149.1 » IEF » IEN
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