isnan

Test for a NaN.

int isnan ( float )
int n isnan ( floatn )

int isnan (double) // if double extension enabled longn isnan (doublen) // if double extension enabled
int isnan (half) // if half extension enabled shortn isnan (halfn) // if half extension enabled

Description

Test for a NaN.

Notes

This function returns a 0 if the specified relation is false and a 1 if the specified relation is true for scalar argument types. It returns a 0 if the specified relation is false and a -1 (i.e. all bits set) if the specified relation is true for vector argument types.

This function can be used with built-in scalar or vector types as arguments and return a scalar vector integer result. The argument type igentype refers to signed integer vector types i.e. char, charn, short, shortn, int, intn, long, and longn.

If extended with cl_khr_fp64, generic type name gentype may indicate double and double{2|4|8|16} as arguments and return values. If extended with cl_khr_fp16, generic type name gentype may indicate half and half{2|4|8|16} as arguments and return values.

Specification

OpenCL Specification

Also see

Relational Functions

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