static const struct powerpc_opcode *
svp64_lookup (uint64_t insn, ppc_cpu_t dialect,
    struct svp64_ctx *svp64)
{
  uint32_t suffix;
  unsigned long op;
  const struct powerpc_opcode *opcode;
  const struct svp64_record *record;
  const struct svp64_record *record_end;

  svp64_insn_set (&svp64->insn, insn);

  if ((svp64_insn_get_prefix_PO (&svp64->insn) != 0x1) ||
      (svp64_insn_get_prefix_id (&svp64->insn) != 0x3))
    return NULL;

  suffix = (uint32_t)svp64_insn_get_suffix (&svp64->insn);
  opcode = lookup_powerpc (suffix, dialect & ~PPC_OPCODE_ANY);
  if (opcode == NULL && (dialect & PPC_OPCODE_ANY) != 0)
    opcode = lookup_powerpc (suffix, dialect);
  if (opcode == NULL)
    return NULL;

  op = SVP64_OP (suffix);
  record_end = (svp64_records + svp64_record_indices[op + 1]);
  for (record = svp64_records + svp64_record_indices[op];
       record < record_end;
       ++record)
    {
      /* binutils consider Rc bit to be a part of the mask.
     SVP64, however, has per-instruction mask.  */
      if ((record->opcode.value & record->opcode.mask) ==
        ((opcode->opcode & opcode->mask) & record->opcode.mask))
    break;
    }
  if (record == record_end)
    return NULL;

  svp64->desc = &record->desc;

  return opcode;
}