Test code looks like:

   static final VectorSpecies<Byte> SPECIES = ByteVector.SPECIES_128;

   public static int iarr[];
   public static byte barr1[];
   public static byte barr2[];

   public static void shiftZero() {
     for (int i = 0; i < barr1.length; i += SPECIES.length()) {
       ByteVector vb = ByteVector.fromArray(SPECIES, barr1, i);
       vb.lanewise(VectorOperators.ASHR, 0).intoArray(barr2, i);
     }
   }
 

https://github.com/openjdk/jdk/pull/2472 fixed the encoding problem but remains a redundant mov.

// generated code from above test case.
  0x0000ffffb1115164: add x17, x12, x14
  0x0000ffffb1115168: ldr q16, [x17, #16]
  0x0000ffffb111516c: mov v16.16b, v16.16b // redundant?
  0x0000ffffb1115170: add x14, x13, x14
  0x0000ffffb1115174: str q16, [x14, #16]