((Rsh32U|Lsh32)x8  <t> x y)  => (ISEL [2] (S(R|L)W <t> x y) (MOVDconst [0])        (CMPconst [0] (ANDconst [0x00E0] y)))
(Rsh32x(64|32)     <t> x y)  => (ISEL [0] (SRAW    <t> x y) (SRAWconst <t> x [31]) (CMP(U|WU)const y [32]))
(Rsh32x16          <t> x y)  => (ISEL [2] (SRAW    <t> x y) (SRAWconst <t> x [31]) (CMPconst [0] (ANDconst [0xFFE0] y)))

			break
		}
		v.reset(OpPPC64SLW)
		v.AddArg2(x, y)
		return true
	}
	// match: (Lsh32x16 <t> x y)
	// result: (ISEL [2] (SLW <t> x y) (MOVDconst [0]) (CMPconst [0] (ANDconst [0xFFE0] y)))
	for {
		t := v.Type
		x := v_0
		y := v_1
		v.reset(OpPPC64ISEL)
		v.AuxInt = int32ToAuxInt(2)
		v0 := b.NewValue0(v.Pos, OpPPC64SLW, t)
		v0.AddArg2(x, y)