SK_YU_READ_4     1415 dev/pci/if_skreg.h 	SK_YU_WRITE_4(sc, reg, (SK_YU_READ_4(sc, reg)) | (x))
SK_YU_READ_4     1418 dev/pci/if_skreg.h 	SK_YU_WRITE_4(sc, reg, (SK_YU_READ_4(sc, reg)) & ~(x))