predicates.md (rx_constshift_operand): New.

* config/rx/predicates.md (rx_constshift_operand): New.
* config/rx/rx.md (zs_cond): New.
(cbranchsi4): Remove mode.
(*cbranchsi4_<code>): Likewise.
(*tstbranchsi4_<code>): New.
(*tstbranchsi4r_<code>): New.
(*tstbranchsi4m_eq): New.
(*tstbranchsi4m_ne): New.
(cbranchsf4): Remove mode.
(*cbranchsf4_<code>): Likewise.

From-SVN: r162731