return bucketShift(oldB)
}

// oldbucketmask provides a mask that can be applied to calculate n % noldbuckets().
func (h *hmap) oldbucketmask() uintptr {
	return h.noldbuckets() - 1
}

func growWork(t *maptype, h *hmap, bucket uintptr) {
	// make sure we evacuate the oldbucket corresponding
	// to the bucket we're about to use
	evacuate(t, h, bucket&h.oldbucketmask())

	h.flags &^= hashWriting
}

func growWork_fast64(t *maptype, h *hmap, bucket uintptr) {
	// make sure we evacuate the oldbucket corresponding
	// to the bucket we're about to use
	evacuate_fast64(t, h, bucket&h.oldbucketmask())

	// evacuate one more oldbucket to make progress on growing
	if h.growing() {
		evacuate_fast64(t, h, h.nevacuate)
	}
}

func evacuate_fast64(t *maptype, h *hmap, oldbucket uintptr) {

	h.flags &^= hashWriting
}

func growWork_fast32(t *maptype, h *hmap, bucket uintptr) {
	// make sure we evacuate the oldbucket corresponding
	// to the bucket we're about to use
	evacuate_fast32(t, h, bucket&h.oldbucketmask())

	// evacuate one more oldbucket to make progress on growing
	if h.growing() {
		evacuate_fast32(t, h, h.nevacuate)
	}
}

func evacuate_fast32(t *maptype, h *hmap, oldbucket uintptr) {

	h.flags &^= hashWriting
}

func growWork_faststr(t *maptype, h *hmap, bucket uintptr) {
	// make sure we evacuate the oldbucket corresponding
	// to the bucket we're about to use
	evacuate_faststr(t, h, bucket&h.oldbucketmask())

	// evacuate one more oldbucket to make progress on growing
	if h.growing() {
		evacuate_faststr(t, h, h.nevacuate)
	}
}

func evacuate_faststr(t *maptype, h *hmap, oldbucket uintptr) {