Mask parameter for atomic_cas()

[rRajeev1755]

Why does atomic_cas() not have a mask parameter similar to atomic_xchg()? Is this a design choice or a gap?

As far as what I understood from comparing the PTX generated by both atomic_cas() and atomic_exch(), they are similar.

The only difference lies in how the predicate register is set. The generated atomic_cas program sets the predicate register to 0xFFFFFFFF, whereas atomic_xchg uses the supplied mask input.

From the high-level implementation, this looks like there are no fundamental changes required to incorporate this feature.
Please read the request #4165