[gsnedders]

To be clear for anyone not so up-to-speed on this: what AArch64 has (conditional select) is strictly less expressive than AArch32 (general predication).

The take away there is that general predication was found to be overly complex where the vast (vast!) majority of the benefit can be modelled with conditional select.

[brandmeyer]

Its less than general predication, but a little bit more than cmov/csel. The second argument can be optionally incremented and/or complemented. Combined with the dedicated zero register, you can do all sorts of interesting things to turn condition-generating instructions into data. A few interesting ones include:

   y = cond ? 0 : -1;
   y = cond ? x : -x;
   x = cond ? 0 : x+1;  //< look ma, circular addressing!