Superseded Standard

IEEE 754-1985

IEEE Standard for Binary Floating-Point Arithmetic

A family of commercially feasible ways for new systems to perform binary floating-point arithmetic is defined. This standard specifies basic and extended floating-point number formats; add, subtract, multiply, divide, square root, remainder, and compare operations; conversions between integer and floating-point formats; conversions between different floating-point formats; conversions between basic-format floating-point numbers and decimal strings; and floating-point exceptions and their handling, including nonnumbers.

Sponsor Committee
C/MSC - Microprocessor Standards Committee
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Status
Superseded Standard
Superseded by
754-2008
Board Approval
1985-03-21
History
ANSI Approved:
1991-05-21
Published:
1985-10-12
Reaffirmed:
1990-12-06

Additional Resources

Interpretation
754-1985_interp.pdf

Working Group Details

Society
IEEE Computer Society
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Sponsor Committee
C/MSC - Microprocessor Standards Committee
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Working Group
754_WG - Working Group for Floating-Point Arithmetic
IEEE Program Manager
Tom Thompson
Contact
Working Group Chair
David Hough
No Active Projects

60559-2020

ISO/IEC/IEEE International Standard - Floating-point arithmetic

This international standard specifies interchange and arithmetic formats and methods for binary and decimal floating-point arithmetic in computer programming environments. This standard specifies exception conditions and their default handling. An implementation of a floating-point system conforming to this standard may be realized entirely in software, entirely in hardware, or in any combination of software and hardware. For operations specified in the normative part of this standard, numerical results and exceptions are uniquely determined by the values of the input data, sequence of operations, and destination formats, all under user control.

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754-2019

IEEE Standard for Floating-Point Arithmetic

This standard specifies interchange and arithmetic formats and methods for binary and decimal floating-point arithmetic in computer programming environments. This standard specifies exception conditions and their default handling. An implementation of a floating-point system conforming to this standard may be realized entirely in software, entirely in hardware, or in any combination of software and hardware. For operations specified in the normative part of this standard, numerical results and exceptions are uniquely determined by the values of the input data, sequence of operations, and destination formats, all under user control.

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754-2008

IEEE Standard for Floating-Point Arithmetic

This standard specifies formats and methods for floating-point arithmetic in computer systems: standard and extended functions with single, double, extended, and extendable precision, and recommends formats for data interchange. Exception conditions are defined and standard handling of these conditions is specified.

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854-1987

IEEE Standard for Radix-Independent Floating-Point Arithmetic

A family of commercially feasible ways for new systems to perform floating-point arithmetic is defined. This standard specifies constraints on parameters defining values of basic and extended floating-point numbers; add, subtract, multiply, divide, square root, remainder, and compare operations; conversions between integers and floating-point numbers; conversions between different floating-point precisions; conversion between basic precision floating-point numbers and decimal strings; and floating-point exceptions and their handling, including nonnumbers. It is intended that an implementation of a floating-point system conforming to this standard can be realized entirely in software, entirely in hardware, or in any combination of software and hardware. Retrofitting issues are not considered.

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No Inactive-Withdrawn Standards
No Inactive-Reserved Standards
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