RLDCR $0, R4, $-16, R6          // 788606f2
	RLDCRCC $0, R4, $-16, R6        // 788606f3
	RLDICL $0, R4, $15, R6          // 788603c0
	RLDICLCC $0, R4, $15, R6        // 788603c1
	RLDICR $0, R4, $15, R6          // 788603c4
	RLDICRCC $0, R4, $15, R6        // 788603c5
	RLDIC $0, R4, $15, R6           // 788603c8
	RLDICCC $0, R4, $15, R6         // 788603c9
	CLRLSLWI $16, R5, $8, R4        // 54a4422e

		p.To.Type = obj.TYPE_REG
		p.To.Reg = r

	case ssa.OpPPC64CLRLSLDI:
		r := v.Reg()
		r1 := v.Args[0].Reg()
		shifts := v.AuxInt
		p := s.Prog(v.Op.Asm())
		// clrlsldi ra,rs,mb,sh will become rldic ra,rs,sh,mb-sh
		p.From = obj.Addr{Type: obj.TYPE_CONST, Offset: ssa.GetPPC64Shiftmb(shifts)}
		p.AddRestSourceConst(ssa.GetPPC64Shiftsh(shifts))
		p.Reg = r1
		p.To.Type = obj.TYPE_REG
		p.To.Reg = r

}

// Merge (RLDICL [encoded] (SRDconst [s] x)) into (RLDICL [new_encoded] x)
// SRDconst on PPC64 is an extended mnemonic of RLDICL. If the input to an
// RLDICL is an SRDconst, and the RLDICL does not rotate its value, the two
// operations can be combined. This functions assumes the two opcodes can
// be merged, and returns an encoded rotate+mask value of the combined RLDICL.