MASK              256 src/cmd/5c/txt.c 	constnode.vconst = v & MASK(32);
MASK              639 src/cmd/cc/com64.c 	c &= MASK(n);
MASK              642 src/cmd/cc/com64.c 			c |= ~MASK(n);
MASK             1054 src/cmd/cc/sub.c 	m = MASK(8*sizeof(uvlong));