* two modes, "zeroing" and "non-zeroing". zeroing mode places a zero in the masked-out element results, where non-zeroing leaves the destination (result) element unmodified.
* predicate must be invertable via an opcode bit (to avoid the need for an instruction which inverts all bits of the predicate mask)
* two modes, "zeroing" and "non-zeroing". zeroing mode places a zero in the masked-out element results, where non-zeroing leaves the destination (result) element unmodified.
* predicate must be invertable via an opcode bit (to avoid the need for an instruction which inverts all bits of the predicate mask)