Notes
If an implementation extends this specification to support IEEE-754 flags or
exceptions, then all built-in relational functions shall proceed without raising the
invalid floating-point exception when one or more of the operands
are NaNs.
The built-in relational functions are extended with cl_khr_fp16 to include versions that take half, and half{2|3|4|8|16} as arguments.
The function returns a 0 if the specified relation is false and a 1
if the specified relation is true for scalar argument types. These
functions shall return 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.
The function returns 0 if either argument is not a number (NaN).
Copyright © 2007-2013 The Khronos Group Inc.
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and/or associated documentation files (the
"Materials"), to deal in the Materials without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Materials, and to
permit persons to whom the Materials are furnished to do so, subject to
the condition that this copyright notice and permission notice shall be included
in all copies or substantial portions of the Materials.