fesetprec()

Updated: May 06, 2022

Set the floating-point precision

Synopsis:

#include <fenv.h>

int fesetprec( int prec );

Arguments:

prec
The new precision; one of the following:
  • FE_PREC_SINGLE
  • FE_PREC_DOUBLE
  • FE_PREC_EXTENDED

Library:

libm
The general-purpose math library.
libm-sve
(QNX Neutrino 7.1 or later) A library that optimizes the code for ARMv8.2 chips that have Scalable Vector Extension hardware.

Your system requirements will determine how you should work with these libraries:

Note: Compile your program with the -fno-builtin option to prevent the compiler from using a built-in version of the function.

Description:

The fesetprec() function sets the floating-point precision. To get the current precision, call fegetprec().

Returns:

0 on success, or -1 if the prec was invalid.

Classification:

QNX Neutrino

Safety:  
Cancellation point No
Interrupt handler Yes
Signal handler Yes
Thread Yes