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bitmap: Convert single bitmap functions to 64-bit.

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Currently the functions to set, clear, and iterate over bitmaps
only operate over 32 bit values. If we convert them to handle
64 bit bitmaps, they can be used in more places.

Suggested-by: Ben Pfaff <blp@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>
This commit is contained in:
Jesse Gross
2015-06-25 09:18:38 -07:00
parent 099772c025
commit 3ee6026aba
4 changed files with 15 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
lib/bitmap.h
View File

@@ -269,13 +269,13 @@ bitmap_is_all_zeros(const unsigned long *bitmap, size_t n)
#define BITMAP_FOR_EACH_1(IDX, SIZE, BITMAP) \
BITMAP_FOR_EACH_1_RANGE(IDX, 0, SIZE, BITMAP)
/* More efficient access to a map of single ulong. */
#define ULONG_FOR_EACH_1(IDX, MAP) \
for (unsigned long map__ = (MAP); \
/* More efficient access to a map of single ullong. */
#define ULLONG_FOR_EACH_1(IDX, MAP) \
for (uint64_t map__ = (MAP); \
map__ && (((IDX) = raw_ctz(map__)), true); \
map__ = zero_rightmost_1bit(map__))
#define ULONG_SET0(MAP, OFFSET) ((MAP) &= ~(1UL << (OFFSET)))
#define ULONG_SET1(MAP, OFFSET) ((MAP) |= 1UL << (OFFSET))
#define ULLONG_SET0(MAP, OFFSET) ((MAP) &= ~(1ULL << (OFFSET)))
#define ULLONG_SET1(MAP, OFFSET) ((MAP) |= 1ULL << (OFFSET))
#endif /* bitmap.h */

10
lib/cmap.c
View File

@@ -390,13 +390,13 @@ cmap_find_batch(const struct cmap *cmap, unsigned long map,
uint32_t c1s[sizeof map * CHAR_BIT];
/* Compute hashes and prefetch 1st buckets. */
ULONG_FOR_EACH_1(i, map) {
ULLONG_FOR_EACH_1(i, map) {
h1s[i] = rehash(impl, hashes[i]);
b1s[i] = &impl->buckets[h1s[i] & impl->mask];
OVS_PREFETCH(b1s[i]);
}
/* Lookups, Round 1. Only look up at the first bucket. */
ULONG_FOR_EACH_1(i, map) {
ULLONG_FOR_EACH_1(i, map) {
uint32_t c1;
const struct cmap_bucket *b1 = b1s[i];
const struct cmap_node *node;
@@ -414,12 +414,12 @@ cmap_find_batch(const struct cmap *cmap, unsigned long map,
continue;
}
/* Found. */
ULONG_SET0(map, i); /* Ignore this on round 2. */
ULLONG_SET0(map, i); /* Ignore this on round 2. */
OVS_PREFETCH(node);
nodes[i] = node;
}
/* Round 2. Look into the 2nd bucket, if needed. */
ULONG_FOR_EACH_1(i, map) {
ULLONG_FOR_EACH_1(i, map) {
uint32_t c2;
const struct cmap_bucket *b2 = b2s[i];
const struct cmap_node *node;
@@ -445,7 +445,7 @@ cmap_find_batch(const struct cmap *cmap, unsigned long map,
}
}
/* Not found. */
ULONG_SET0(result, i); /* Fix the result. */
ULLONG_SET0(result, i); /* Fix the result. */
continue;
}
found:

6
lib/dpif-netdev.c
View File

@@ -3916,14 +3916,14 @@ dpcls_lookup(const struct dpcls *cls, const struct netdev_flow_key keys[],
}
/* Compute hashes for the remaining keys. */
ULONG_FOR_EACH_1(i, map) {
ULLONG_FOR_EACH_1(i, map) {
hashes[i] = netdev_flow_key_hash_in_mask(&mkeys[i],
&subtable->mask);
}
/* Lookup. */
map = cmap_find_batch(&subtable->rules, map, hashes, nodes);
/* Check results. */
ULONG_FOR_EACH_1(i, map) {
ULLONG_FOR_EACH_1(i, map) {
struct dpcls_rule *rule;
CMAP_NODE_FOR_EACH (rule, cmap_node, nodes[i]) {
@@ -3932,7 +3932,7 @@ dpcls_lookup(const struct dpcls *cls, const struct netdev_flow_key keys[],
goto next;
}
}
ULONG_SET0(map, i); /* Did not match. */
ULLONG_SET0(map, i); /* Did not match. */
next:
; /* Keep Sparse happy. */
}

4
tests/test-cmap.c
View File

@@ -127,7 +127,7 @@ check_cmap(struct cmap *cmap, const int values[], size_t n,
}
map = cmap_find_batch(cmap, map, hashes, nodes);
ULONG_FOR_EACH_1(k, map) {
ULLONG_FOR_EACH_1(k, map) {
struct element *e;
CMAP_NODE_FOR_EACH (e, node, nodes[k]) {
@@ -435,7 +435,7 @@ find_batch(const struct cmap *cmap, const int value)
map >>= BITMAP_ULONG_BITS - i; /* Clear excess bits. */
map = cmap_find_batch(cmap, map, hashes, nodes);
ULONG_FOR_EACH_1(i, map) {
ULLONG_FOR_EACH_1(i, map) {
struct element *e;
CMAP_NODE_FOR_EACH (e, node, nodes[i]) {