PetscSetFPTrap

Enables traps/exceptions on common floating point errors. This option may not work on certain machines.

Synopsis

#include "petsc.h"  
int PetscSetFPTrap(PetscFPTrap flag)
Not Collective

Input Parameters

flag -PETSC_FP_TRAP_ON, PETSC_FP_TRAP_OFF.

Options Database Keys

-fp_trap -Activates floating point trapping

Description

On systems that support it, this routine causes floating point overflow, divide-by-zero, and invalid-operand (e.g., a NaN) to cause a message to be printed and the program to exit.

Caution

On certain machines, in particular the IBM rs6000, floating point trapping is VERY slow!

Level:advanced
Location:
src/sys/src/error/fp.c
Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages