YourWishes/jerryscript
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Optimize conditional jumps.

Browse Source 
The ecma_op_to_boolean return value is changed to bool for faster
evaluation, and no need to swap operandos of relational compare.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2016-05-30 05:56:22 -07:00
parent 08c312bc55
commit f24be95f89
12 changed files with 149 additions and 193 deletions
Download Patch File Download Diff File Expand all files Collapse all files
jerry-core/ecma/base/ecma-helpers-value.c
+39 -4
View File
@@ -59,6 +59,10 @@ JERRY_STATIC_ASSERT (sizeof (uintptr_t) > sizeof (ecma_value_t),
#endif /* ECMA_VALUE_CAN_STORE_UINTPTR_VALUE_DIRECTLY */
JERRY_STATIC_ASSERT ((ECMA_SIMPLE_VALUE_FALSE | 0x1) == ECMA_SIMPLE_VALUE_TRUE
&& ECMA_SIMPLE_VALUE_FALSE != ECMA_SIMPLE_VALUE_TRUE,
only_the_lowest_bit_must_be_different_for_simple_value_true_and_false);
/**
* Get type field of ecma value
*
@@ -109,6 +113,18 @@ ecma_get_pointer_from_ecma_value (ecma_value_t value) /**< value */
#endif /* ECMA_VALUE_CAN_STORE_UINTPTR_VALUE_DIRECTLY */
} /* ecma_get_pointer_from_ecma_value */
/**
* Check if the value is simple ecma-value.
*
* @return true - if the value is a simple value,
* false - otherwise.
*/
inline bool __attr_pure___ __attr_always_inline___
ecma_is_value_simple (ecma_value_t value) /**< ecma value */
{
return (value & ECMA_DIRECT_TYPE_MASK) == ECMA_DIRECT_TYPE_SIMPLE_VALUE;
} /* ecma_is_value_simple */
/**
* Check whether the value is a given simple value.
*
@@ -167,7 +183,7 @@ ecma_is_value_null (ecma_value_t value) /**< ecma value */
inline bool __attr_pure___ __attr_always_inline___
ecma_is_value_boolean (ecma_value_t value) /**< ecma value */
{
return ecma_is_value_true (value) || ecma_is_value_false (value);
return ecma_is_value_true (value | (1 << ECMA_DIRECT_SHIFT));
} /* ecma_is_value_boolean */
/**
@@ -500,6 +516,14 @@ ecma_get_integer_from_value (ecma_value_t value) /**< ecma value */
return ((ecma_integer_value_t) value) >> ECMA_DIRECT_SHIFT;
} /* ecma_get_integer_from_value */
inline ecma_number_t __attr_pure___ __attr_always_inline___
ecma_get_float_from_value (ecma_value_t value) /**< ecma value */
{
JERRY_ASSERT (ecma_get_value_type_field (value) == ECMA_TYPE_FLOAT);
return *(ecma_number_t *) ecma_get_pointer_from_ecma_value (value);
} /* ecma_get_float_from_value */
/**
* Get floating point value from an ecma value
*
@@ -513,9 +537,7 @@ ecma_get_number_from_value (ecma_value_t value) /**< ecma value */
return (ecma_number_t) ecma_get_integer_from_value (value);
}
JERRY_ASSERT (ecma_get_value_type_field (value) == ECMA_TYPE_FLOAT);
return *(ecma_number_t *) ecma_get_pointer_from_ecma_value (value);
return ecma_get_float_from_value (value);
} /* ecma_get_number_from_value */
/**
@@ -563,6 +585,19 @@ ecma_get_object_from_value (ecma_value_t value) /**< ecma value */
return (ecma_object_t *) ecma_get_pointer_from_ecma_value (value);
} /* ecma_get_object_from_value */
/**
* Invert a boolean value
*
* @return ecma value
*/
inline ecma_value_t __attr_pure___ __attr_always_inline___
ecma_invert_boolean_value (ecma_value_t value) /**< ecma value */
{
JERRY_ASSERT (ecma_is_value_boolean (value));
return (value ^ (1 << ECMA_DIRECT_SHIFT));
} /* ecma_invert_boolean_value */
/**
* Get the value from an error ecma value
*