Open System Services Library Calls Reference Manual (G06.29+, H06.08+, J06.03+)

fetestexcept(3) OSS Library Calls Reference Manual
NAME
fetestexcept - Raises floating-point exception flags
LIBRARY
H-series and J-series native Guardian processes: $SYSTEM.ZDLLnnn.ZCREDLL
32-bit H-series and J-series OSS processes: /G/system/zdllnnn/zcredll
64-bit H-series and J-series OSS processes: /G/system/zdllnnn/ycredll
SYNOPSIS
#include <fenv.h>
int fetestexcept(
int excepts);
PARAMETERS
excepts Specifies the floating-point exception flags that are to be queried.
DESCRIPTION
The fetestexcept( ) function determines which of a specified subset of the floating-point excep-
tion flags are currently set.
The excepts parameter can be constructed as a bitwise OR of the exception macros:
FE_INEXACT, FE_DIVBYZERO, FE_UNDERFLOW, FE_OVERFLOW, and
FE_INVALID. FE_ALL_EXCEPT represents all the floating-point exceptions.
NOTES
This function is implemented only for the IEEE_float floating-point option. Applications using
this function cannot be compiled if the specified floating-point option is Tandem_float.
RETURN VALUES
The fetestexcept( ) function returns the value of the bitwise OR of the exception macros
corresponding to the currently set floating-point exceptions included in the excepts parameter.
RELATED INFORMATION
Functions: feclearexcept(3), fegetexceptflag(3), feraiseexcept(3), fesetexceptflag(3).
STANDARDS CONFORMANCE
This function conforms to the ISO/IEC 9899:1999 standard.
This function conforms to the IEEE Std 1003.1, 2004 Edition.
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