7.6.2 Floating-point exceptions

• 7.6.2.1 The feclearexcept function
• 7.6.2.2 The fegetexceptflag function
• 7.6.2.3 The feraiseexcept function
• 7.6.2.4 The fesetexceptflag function
• 7.6.2.5 The fetestexcept function

1

The following functions provide access to the floating-point status flags.[1] The int input argument for the functions represents a subset of floating-point exceptions, and can be zero or the bitwise OR of one or more floating-point exception macros, for example FE_OVERFLOW | FE_INEXACT. For other argument values the behavior of these functions is undefined.

Footnotes

[1]

The functions fetestexcept, feraiseexcept, and feclearexcept support the basic abstraction of flags that are either set or clear. An implementation may endow floating-point status flags with more information – for example, the address of the code which first raised the floating- point exception; the functions fegetexceptflag and fesetexceptflag deal with the full content of flags.