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Sixteen bit hash for strings.

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JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2016-06-27 03:04:50 -07:00
parent 0a32c97755
commit e9a47aff95
4 changed files with 27 additions and 17 deletions
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jerry-core/ecma/operations/ecma-objects.c
+13 -7
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@@ -31,6 +31,11 @@
* @{
*/
/**
* Hash bitmap size for ecma objects
*/
#define ECMA_OBJECT_HASH_BITMAP_SIZE 256
/**
* Assert that specified object type value is valid
*
@@ -48,6 +53,7 @@
#else /* JERRY_NDEBUG */
#define JERRY_ASSERT_OBJECT_TYPE_IS_VALID(type)
#endif /* !JERRY_NDEBUG */
/**
* [[Get]] ecma object's operation
*
@@ -483,7 +489,7 @@ ecma_op_object_is_prototype_of (ecma_object_t *base_p, /**< base object */
*
* Order of names in the collection:
* - integer indices in ascending order
* - other indices in creation order (for built-ins - in the order the properties are listed in specification).
* - other indices in creation order (for built-ins: the order of the properties are listed in specification).
*
* Note:
* Implementation of the routine assumes that new properties are appended to beginning of corresponding object's
@@ -510,7 +516,7 @@ ecma_op_object_get_property_names (ecma_object_t *obj_p, /**< object */
const bool obj_is_builtin = ecma_get_object_is_builtin (obj_p);
const size_t bitmap_row_size = sizeof (uint32_t) * JERRY_BITSINBYTE;
uint32_t names_hashes_bitmap[(1u << LIT_STRING_HASH_BITS) / bitmap_row_size];
uint32_t names_hashes_bitmap[ECMA_OBJECT_HASH_BITMAP_SIZE / bitmap_row_size];
memset (names_hashes_bitmap, 0, sizeof (names_hashes_bitmap));
@@ -571,14 +577,14 @@ ecma_op_object_get_property_names (ecma_object_t *obj_p, /**< object */
ecma_collection_iterator_t iter;
ecma_collection_iterator_init (&iter, prop_names_p);
uint32_t own_names_hashes_bitmap[(1u << LIT_STRING_HASH_BITS) / bitmap_row_size];
uint32_t own_names_hashes_bitmap[ECMA_OBJECT_HASH_BITMAP_SIZE / bitmap_row_size];
memset (own_names_hashes_bitmap, 0, sizeof (own_names_hashes_bitmap));
while (ecma_collection_iterator_next (&iter))
{
ecma_string_t *name_p = ecma_get_string_from_value (*iter.current_value_p);
lit_string_hash_t hash = name_p->hash;
uint8_t hash = (uint8_t) name_p->hash;
uint32_t bitmap_row = (uint32_t) (hash / bitmap_row_size);
uint32_t bitmap_column = (uint32_t) (hash % bitmap_row_size);
@@ -613,7 +619,7 @@ ecma_op_object_get_property_names (ecma_object_t *obj_p, /**< object */
if (!(is_enumerable_only && !ecma_is_property_enumerable (property_p)))
{
lit_string_hash_t hash = name_p->hash;
uint8_t hash = (uint8_t) name_p->hash;
uint32_t bitmap_row = (uint32_t) (hash / bitmap_row_size);
uint32_t bitmap_column = (uint32_t) (hash % bitmap_row_size);
@@ -652,7 +658,7 @@ ecma_op_object_get_property_names (ecma_object_t *obj_p, /**< object */
ecma_make_string_value (name_p),
true);
lit_string_hash_t hash = name_p->hash;
uint8_t hash = (uint8_t) name_p->hash;
uint32_t bitmap_row = (uint32_t) (hash / bitmap_row_size);
uint32_t bitmap_column = (uint32_t) (hash % bitmap_row_size);
@@ -771,7 +777,7 @@ ecma_op_object_get_property_names (ecma_object_t *obj_p, /**< object */
ecma_string_t *name_p = names_p[i];
lit_string_hash_t hash = name_p->hash;
uint8_t hash = (uint8_t) name_p->hash;
uint32_t bitmap_row = (uint32_t) (hash / bitmap_row_size);
uint32_t bitmap_column = (uint32_t) (hash % bitmap_row_size);