fegetround(3m) [hpux man page]
fegetround(3M) fegetround(3M) NAME
fegetround() - get floating-point rounding direction mode SYNOPSIS
DESCRIPTION
The function gets the current rounding direction, as specified by the IEEE 754 (IEC 60559) floating-point standard. The default rounding direction mode is round to nearest USAGE
To use this function, compile either with the default option or with the and options. Make sure your program includes For HP Integrity servers, specify on the compiler command line or place the call to this function under the effect of an affirmative pragma: If the pragma is placed outside of any top-level declarations in a file, the pragma will apply to all declarations in the compilation fol- lowing the pragma until another pragma is encountered or until the end of the file is reached. If the pragma is placed at the beginning of a block (compound statement), the pragma will apply until another pragma is encountered or until the end of the block is reached. For PA-RISC, you might need to use the compiler option in order to prevent optimizations that can undermine the specified behavior of this function. Link in the math library by specifying on the compiler or linker command line. For more information, see the at the following site: RETURN VALUE
The function returns the value of the rounding direction macro representing the current rounding direction. The return value will match one of the following macros, which are defined in Round to nearest. If the two nearest representable are equally near, the one with its least significant bit zero is delivered. Round upwards (towards +infinity). Round downwards (towards -infinity). Round toward zero. ERRORS
No errors are defined. EXAMPLES
Save, set, and restore the rounding direction. SEE ALSO
fesetround(3M), fenv(5). STANDARDS CONFORMANCE
: ISO/IEC C99 (including Annex F, ``IEC 60559 floating-point arithmetic'') fegetround(3M)
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fetestexcept(3M) fetestexcept(3M) NAME
fetestexcept() - test floating-point exceptions SYNOPSIS
DESCRIPTION
The function determines which of a specified subset of the floating-point exception flags are currently set. The excepts argument speci- fies the floating-point exception flags to be queried. The argument can be constructed as a bitwise OR of the exception macros: and repre- sents all the floating-point exceptions. USAGE
To use this function, compile either with the default option or with the and options. Make sure your program includes For HP Integrity servers, specify on the compiler command line or place the call to this function under the effect of an affirmative pragma: If the pragma is placed outside of any top-level declarations in a file, the pragma will apply to all declarations in the compilation fol- lowing the pragma until another pragma is encountered or until the end of the file is reached. If the pragma is placed at the beginning of a block (compound statement), the pragma will apply until another pragma is encountered or until the end of the block is reached. For PA-RISC, you might need to use the compiler option in order to prevent optimizations that can undermine the specified behavior of this function. Link in the math library by specifying on the compiler or linker command line. For more information, see the at the following site: RETURN VALUE
The function returns the bitwise OR of the exception macros corresponding to the currently set floating-point exceptions included in excepts. ERRORS
No errors are defined. EXAMPLES
Call if invalid is set, then if overflow is set: SEE ALSO
feclearexcept(3M), fegetexceptflag(3M), fegettrapenable(3M), feraiseexcept(3M), fesetexceptflag(3M), fesettrapenable(3M), fenv(5). STANDARDS CONFORMANCE
: ISO/IEC C99 (including Annex F, "IEC 60559 floating-point arithmetic") fetestexcept(3M)