For further information on this topic, see the following:
The fp_clr_flag, fp_set_flag, fp_read_flag, or fp_swap_flag subroutine, fp_raise_xcp subroutine, fp_sh_trap_info or fp_sh_set_stat subroutine, fp_trap subroutine in AIX 5L Version 5.2 Technical Reference: Base Operating System and Extensions Volume 1.
The sigaction, sigvec or signal subroutine in AIX 5L Version 5.2 Technical Reference: Base Operating System and Extensions Volume 2.