A64F_LSL16        221 lj_emit_arm64.h 	  emit_d(as, is64 | A64I_MOVKw | A64F_U16(u16) | A64F_LSL16(shift), rd);
A64F_LSL16        226 lj_emit_arm64.h 		 A64F_U16((n64 >> lshift) & 0xffff) | A64F_LSL16(lshift), rd);