fp_invalid_op, fp_divbyzero, fp_overflow, fp_underflow, fp_inexact, fp_any_xcp Subroutine

Purpose

Tests to see if a floating-point exception has occurred.

Library

Standard C Library (libc.a)

Syntax

#include <float.h>
#include <fpxcp.h>

int 
fp_invalid_op() 
int fp_divbyzero()

int fp_overflow() 
int fp_underflow()

int 
fp_inexact()
int fp_any_xcp()

Description

These subroutines aid in determining when an exception has occurred and the exception type. These subroutines can be called explicitly after blocks of code that may cause a floating-point exception.

Return Values

The fp_invalid_op subroutine returns a value of 1 if a floating-point invalid-operation exception status flag is set. Otherwise, a value of 0 is returned.

The fp_divbyzero subroutine returns a value of 1 if a floating-point divide-by-zero exception status flag is set. Otherwise, a value of 0 is returned.

The fp_overflow subroutine returns a value of 1 if a floating-point overflow exception status flag is set. Otherwise, a value of 0 is returned.

The fp_underflow subroutine returns a value of 1 if a floating-point underflow exception status flag is set. Otherwise, a value of 0 is returned.

The fp_inexact subroutine returns a value of 1 if a floating-point inexact exception status flag is set. Otherwise, a value of 0 is returned.

The fp_any_xcp subroutine returns a value of 1 if a floating-point invalid operation, divide-by-zero, overflow, underflow, or inexact exception status flag is set. Otherwise, a value of 0 is returned.