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

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

int fp_iop_snan()int fp_iop_infsinf()

int fp_iop_infdinf()int fp_iop_zrdzr()

int fp_iop_infmzr()int fp_iop_invcmp()

int fp_iop_sqrt()int fp_iop_convert()

int fp_iop_vxsoft ();

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_iop_snan**
subroutine returns a value of 1 if a floating-point invalid-operation
exception status flag is set due to a signaling NaN (NaNS) flag.
Otherwise, a value of 0 is returned.

The **fp_iop_infsinf**
subroutine returns a value of 1 if a floating-point invalid-operation
exception status flag is set due to an INF-INF flag. Otherwise, a value
of 0 is returned.

The **fp_iop_infdinf**
subroutine returns a value of 1 if a floating-point invalid-operation
exception status flag is set due to an INF/INF flag. Otherwise, a value
of 0 is returned.

The **fp_iop_zrdzr**
subroutine returns a value of 1 if a floating-point invalid-operation
exception status flag is set due to a 0.0/0.0 flag.
Otherwise, a value of 0 is returned.

The **fp_iop_infmzr**
subroutine returns a value of 1 if a floating-point invalid-operation
exception status flag is set due to an INF*0.0 flag. Otherwise,
a value of 0 is returned.

The **fp_iop_invcmp**
subroutine returns a value of 1 if a floating-point invalid-operation
exception status flag is set due to a compare involving a NaN.
Otherwise, a value of 0 is returned.

The **fp_iop_sqrt**
subroutine returns a value of 1 if a floating-point invalid-operation
exception status flag is set due to the calculation of a square root of a
negative number. Otherwise, a value of 0 is returned.

The **fp_iop_convert**
subroutine returns a value of 1 if a floating-point invalid-operation
exception status flag is set due to the conversion of a floating-point number
to an integer, where the floating-point number was a NaN, an INF, or was
outside the range of the integer. Otherwise, a value of 0 is
returned.

The **fp_iop_vxsoft**
subroutine returns a value of 1 if the VXSOFT detail bit is on.
Otherwise, a value of 0 is returned.
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