The extensions spec describes the functions provided by the extensions as

These extensions became core features in OpenCL 1.1, except the built-in atomic function names are changed to use the atomic_ prefix instead of atom_ and the volatile qualifier was added to the pointer parameter p.

However, the OpenCL C spec isn't entirely consistent with this - it describes both atomic_ and atom_ functions, and all of them (with one exception which looks like an editing inconsistency) have the volatile qualifier. To complete the extension integration with the C spec, I'd like to figure out:

• Does the core provide only the atomic_ variants, or both atomic_ and atom_ variants of these functions?
• Do the atom_ variants as provided by the extensions indeed not have the volatile qualifier?