Hexadecimal Floating Point
Hexadecimal floating point may refer to: * IBM hexadecimal floating point in the IBM System 360 and 370 series of computers and others since 1964 * Hexadecimal floating-point arithmetic in the Illinois ILLIAC III computer in 1966 * Hexadecimal floating-point arithmetic in the SDS Sigma 7 computer in 1966 * Hexadecimal floating-point arithmetic in the SDS Sigma 5 computer in 1967 * Hexadecimal floating-point arithmetic in the Xerox Sigma 9 computer in 1970 * Hexadecimal floating-point arithmetic in the Interdata 8/32 computer in the 1970s * Hexadecimal floating-point arithmetic in the Manchester MU5 computer in 1972 * Hexadecimal floating-point arithmetic in the Data General Eclipse S/200 computer in ca. 1974 * Hexadecimal floating-point arithmetic in the Gould Powernode 9080 computer in the 1980s * Hexadecimal floating-point arithmetic in the HEP computer in 1982 * Hexadecimal floating-point arithmetic in the SEL System 85 computer * Hexadecimal floating-point arithmetic ...
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IBM Hexadecimal Floating Point
Hexadecimal floating point (now called HFP by IBM) is a format for encoding floating-point numbers first introduced on the IBM System/360 computers, and supported on subsequent machines based on that architecture, as well as machines which were intended to be application-compatible with System/360. In comparison to IEEE 754 floating point, the HFP format has a longer significand, and a shorter exponent. All HFP formats have 7 bits of exponent with a bias of 64. The normalized range of representable numbers is from 16−65 to 1663 (approx. 5.39761 × 10−79 to 7.237005 × 1075). The number is represented as the following formu