message: Fix movsx(S32, S64).
diff: @@ -1384,7 +1384,7 @@ impl Emitter for Assembler {
  } else {
  dynasm!(self ; b >after ; disp: ; .dword -disp ; after: ; ldr w_tmp3, <disp ; sub x_tmp3, X(map_gpr(base).x()), x_tmp3);
  }
  - dynasm!(self ; ldrh W(map_gpr(dst).x()), [x_tmp3]; sxtw X(map_gpr(dst).x()), W(map_gpr(dst).x()));
  + dynasm!(self ; ldr W(map_gpr(dst).x()), [x_tmp3]; sxtw X(map_gpr(dst).x()), W(map_gpr(dst).x()));
  }
  _ => unreachable!(),
  }
  