ISO/IEC TS 18661-1:2014扩展了编程语言C，以支持符合ISO/IEC/IEEE 60559:2011的二进制浮点算法。它涵盖了IEC 60559的所有要求，因为这些要求与使用IEC 60559二进制格式的C浮动类型有关。 ISO/IEC TS 18661-1:2014未涵盖十进制浮点运算，也未涵盖IEC 60559的大多数可选功能。 ISO/IEC TS 18661-1:2014主要是对IEC 9899:2011（C11）标准附录F（IEC 60559浮点算术）的更新。然而，它建议在C11的库子句中添加适用于一般实现的新接口。此外，它还包括C11中的一些辅助变更，其中规范对IEC 60559的支持存在问题。

ISO/IEC TS 18661-1:2014 extends programming language C to support binary floating-point arithmetic conforming to ISO/IEC/IEEE 60559:2011. It covers all requirements of IEC 60559 as they pertain to C floating types that use IEC 60559 binary formats. ISO/IEC TS 18661-1:2014 does not cover decimal floating-point arithmetic, nor does it cover most optional features of IEC 60559. ISO/IEC TS 18661-1:2014 is primarily an update to IEC 9899:2011 (C11), normative Annex F (IEC 60559 floating-point arithmetic). However, it proposes that the new interfaces that are suitable for general implementations be added in the Library clauses of C11. Also it includes a few auxiliary changes in C11 where the specification is problematic for IEC 60559 support.