BLF_TRILLACTIVE
blp->bl_flags &= ~BLF_TRILLACTIVE;
blp->bl_flags &= ~BLF_TRILLACTIVE;
if (!(blp->bl_flags & BLF_TRILLACTIVE) ||
(!(blp->bl_flags & BLF_TRILLACTIVE) ||
newflags = BLF_TRILLACTIVE;
blp->bl_flags = (blp->bl_flags & ~BLF_TRILLACTIVE) | newflags;