ISO/IEC TR 24733:2011 PDF

Name: ISO/IEC TR 24733:2011 — Information technology — Programming languages, their environments and system software interfaces — Extensions for the programming language C++ to support decimal floating-point arithmetic
SKU: ISO/IEC TR 24733:2011
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Information technology — Programming languages, their environments and system software interfaces — Extensions for the programming language C++ to support decimal floating-point arithmetic

Название (английский):

ISO/IEC TR 24733:2011

Information technology — Programming languages, their environments and system software interfaces — Extensions for the programming language C++ to support decimal floating-point arithmetic

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 56
Дата публикации:: 25 октября 2011 г.
Издание:: ISO/IEC TR 24733 edition 1 version 1
ICS:: 35.060

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Описание (английский):

ISO/IEC TR 24733:2011 specifies an extension to the programming language C++, specified by ISO/IEC 14882:2003. The extension provides support for decimal floating-point arithmetic that is consistent with the specification in IEEE 754-2008. ISO/IEC TR 24733:2011 does not consider the binary floating-point arithmetic specified in IEEE 754-2008.

Abstract

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Другие стандарты ISO

Overview

ISO/IEC TR 24733:2011 is a Technical Report that specifies extensions to the C++ language (ISO/IEC 14882:2003) to support decimal floating-point arithmetic in a way that is consistent with IEEE 754-2008. As an informative Technical Report (not a normative International Standard), it defines how decimal data, operations and floating environment (context) map into C++ types, headers and library facilities to reduce rounding errors that arise from binary ⇄ decimal conversions.

Key topics and technical requirements

Decimal floating-point types: introduces abstract C++ types for decimal arithmetic (commonly referenced as decimal32, decimal64 and decimal128) and a new header **** describing their classes, constructors, conversions and operators.

Arithmetic model: formalizes data (numbers and NaNs), operations (add, multiply, etc.) and context (exception flags and controls such as rounding modes) for decimal arithmetic in C++.

Library and header extensions: specifies additions and changes to standard headers including **

**, /, /, /, /, /, / and **** (facets for formatted IO).

Floating environment functions: provides decimal-aware environment controls and query functions (examples in the Report include fe_dec_getround and fe_dec_setround) to manage rounding modes and exception flags.

Type traits and utilities: adds traits like is_decimal_floating_point, hash specializations, and locale facets (extended_num_get / extended_num_put) to support parsing and formatted I/O of decimal types.

Conformance focus: the extensions are defined at the language/library level; concrete storage layouts and hardware implementations remain implementation-defined.

Practical applications and users

This Technical Report is targeted at:

C++ compiler and standard library implementers who need portable support for decimal floating point.

Library authors building decimal arithmetic and financial libraries.

Financial, accounting and business software developers who require decimal arithmetic to avoid binary-decimal conversion rounding errors and to support auditable rounding semantics.

Embedded and hardware vendors considering decimal arithmetic support consistent with IEEE 754-2008.

Regulatory/audit systems where exact decimal rounding and traceable results are required.

Real-world uses include financial calculations, billing/tax systems, currency computations, formatted decimal I/O, and any application where decimal representation and rounding rules must be preserved.

Related standards

IEEE 754-2008 - Decimal floating-point formats and arithmetic (basis for behavior).

ISO/IEC 14882:2003 - C++ language standard referenced by the Report.

IEEE 854, ANSI X3-274 - historical references in the Report’s arithmetic model.

Keywords: ISO/IEC TR 24733:2011, C++ decimal floating-point, IEEE 754-2008, decimal32, decimal64, decimal128, decimal arithmetic, cfenv, decimal conversion, financial computing.

ISO/IEC TR 24733:2011 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications and users

Related standards

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