Tests to see if a floating-point exception has occurred.
Standard C Library (libc.a)
#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()
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.
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.