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Refactor ecma value to store pointers directly in ecma values rather than compressing them.

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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
2016-04-15 11:35:51 -07:00
parent bb665336d4
commit e92ecd44e7
4 changed files with 110 additions and 119 deletions
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jerry-core/ecma/base/ecma-globals.h
+17 -17
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@@ -58,7 +58,8 @@ typedef enum
ECMA_TYPE_SIMPLE, /**< simple value */
ECMA_TYPE_NUMBER, /**< 64-bit integer */
ECMA_TYPE_STRING, /**< pointer to description of a string */
ECMA_TYPE_OBJECT /**< pointer to description of an object */
ECMA_TYPE_OBJECT, /**< pointer to description of an object */
ECMA_TYPE___MAX = ECMA_TYPE_OBJECT /** highest value for ecma types */
} ecma_type_t;
/**
@@ -85,34 +86,33 @@ typedef enum
/**
* Description of an ecma value
*
* Bit-field structure: type (2) | error (1) | value (ECMA_POINTER_FIELD_WIDTH)
* Bit-field structure: type (2) | error (1) | value (29)
*/
typedef uint32_t ecma_value_t;
/**
* Value type (ecma_type_t)
*/
#define ECMA_VALUE_TYPE_POS (0)
#define ECMA_VALUE_TYPE_WIDTH (2)
#if UINTPTR_MAX <= UINT32_MAX
/**
* Value is error (boolean)
* MEM_ALIGNMENT_LOG aligned pointers can be stored directly in ecma_value_t
*/
#define ECMA_VALUE_ERROR_POS (ECMA_VALUE_TYPE_POS + \
ECMA_VALUE_TYPE_WIDTH)
#define ECMA_VALUE_ERROR_WIDTH (1)
#define ECMA_VALUE_CAN_STORE_UINTPTR_VALUE_DIRECTLY
#endif /* UINTPTR_MAX <= UINT32_MAX */
/**
* Simple value (ecma_simple_value_t) or compressed pointer to value (depending on value_type)
* Mask for ecma types in ecma_type_t
*/
#define ECMA_VALUE_VALUE_POS (ECMA_VALUE_ERROR_POS + \
ECMA_VALUE_ERROR_WIDTH)
#define ECMA_VALUE_VALUE_WIDTH (ECMA_POINTER_FIELD_WIDTH)
#define ECMA_VALUE_TYPE_MASK 0x3u
/**
* Size of ecma value description, in bits
* Error flag in ecma_type_t
*/
#define ECMA_VALUE_SIZE (ECMA_VALUE_VALUE_POS + ECMA_VALUE_VALUE_WIDTH)
#define ECMA_VALUE_ERROR_FLAG 0x4u
/**
* Shift for value part in ecma_type_t
*/
#define ECMA_VALUE_SHIFT 3
/**
* Internal properties' identifiers.