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Implement direct strings. (#2196)

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Direct strings are a new type of direct ecma-values (no memory allocation
is needed for encoding them) in JerryScript. Currently magic strings,
external magic strings and uint values are encoded as direct strings.

The constant pool of JerryScript byte-code is changed to hold ecma-values
rather than cpointers to support direct strings.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2018-02-23 00:21:46 +01:00
committed by yichoi
parent fbf5c32747
commit 51e3c4455a
37 changed files with 1493 additions and 1148 deletions
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jerry-core/ecma/base/ecma-lcache.c
+4 -29
View File
@@ -143,38 +143,13 @@ static inline jmem_cpointer_t __attr_always_inline___
ecma_string_to_lcache_property_name (const ecma_string_t *prop_name_p, /**< property name */
ecma_property_t *name_type_p) /**< [out] property name type */
{
ecma_string_container_t container = ECMA_STRING_GET_CONTAINER (prop_name_p);
switch (container)
if (ECMA_IS_DIRECT_STRING (prop_name_p))
{
case ECMA_STRING_CONTAINER_UINT32_IN_DESC:
case ECMA_STRING_CONTAINER_MAGIC_STRING:
case ECMA_STRING_CONTAINER_MAGIC_STRING_EX:
{
#ifdef JERRY_CPOINTER_32_BIT
*name_type_p = (ecma_property_t) container;
return (jmem_cpointer_t) prop_name_p->u.uint32_number;
#else /* !JERRY_CPOINTER_32_BIT */
if (prop_name_p->u.uint32_number < (UINT16_MAX + 1))
{
*name_type_p = (ecma_property_t) container;
return (jmem_cpointer_t) prop_name_p->u.uint32_number;
}
#endif /* JERRY_CPOINTER_32_BIT */
break;
}
default:
{
break;
}
*name_type_p = (ecma_property_t) ECMA_GET_DIRECT_STRING_TYPE (prop_name_p);
return (jmem_cpointer_t) ECMA_GET_DIRECT_STRING_VALUE (prop_name_p);
}
*name_type_p = ECMA_PROPERTY_NAME_TYPE_STRING;
*name_type_p = ECMA_DIRECT_STRING_PTR;
jmem_cpointer_t prop_name_cp;
ECMA_SET_NON_NULL_POINTER (prop_name_cp, prop_name_p);