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Optimize arithmetic in VM.

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Add, substract, mul, mod, and increment/decrement operators are optimized.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2016-06-29 05:25:49 -07:00
parent a81c7c83d7
commit d882709ed2
4 changed files with 201 additions and 97 deletions
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jerry-core/vm/opcodes-ecma-arithmetics.c
-71
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@@ -46,63 +46,6 @@ do_number_arithmetic (number_arithmetic_op op, /**< number arithmetic operation
ecma_value_t left_value, /**< left value */
ecma_value_t right_value) /**< right value */
{
JERRY_STATIC_ASSERT (ECMA_INTEGER_MULTIPLY_MAX * ECMA_INTEGER_MULTIPLY_MAX <= ECMA_INTEGER_NUMBER_MAX
&& -(ECMA_INTEGER_MULTIPLY_MAX * ECMA_INTEGER_MULTIPLY_MAX) >= ECMA_INTEGER_NUMBER_MIN,
square_of_integer_multiply_max_must_fit_into_integer_value_range);
JERRY_STATIC_ASSERT (ECMA_INTEGER_NUMBER_MAX * 2 <= INT32_MAX
&& ECMA_INTEGER_NUMBER_MIN * 2 >= INT32_MIN,
doubled_ecma_numbers_must_fit_into_int32_range);
JERRY_ASSERT (!ECMA_IS_VALUE_ERROR (left_value)
&& !ECMA_IS_VALUE_ERROR (right_value));
if (ecma_are_values_integer_numbers (left_value, right_value))
{
switch (op)
{
case NUMBER_ARITHMETIC_SUBSTRACTION:
{
ecma_integer_value_t left_integer = ecma_get_integer_from_value (left_value);
ecma_integer_value_t right_integer = ecma_get_integer_from_value (right_value);
return ecma_make_int32_value ((int32_t) (left_integer - right_integer));
}
case NUMBER_ARITHMETIC_MULTIPLICATION:
{
ecma_integer_value_t left_integer = ecma_get_integer_from_value (left_value);
ecma_integer_value_t right_integer = ecma_get_integer_from_value (right_value);
if (-ECMA_INTEGER_MULTIPLY_MAX <= left_integer
&& left_integer <= ECMA_INTEGER_MULTIPLY_MAX
&& -ECMA_INTEGER_MULTIPLY_MAX <= right_integer
&& right_integer <= ECMA_INTEGER_MULTIPLY_MAX)
{
return ecma_make_integer_value (left_integer * right_integer);
}
break;
}
case NUMBER_ARITHMETIC_DIVISION:
{
/* Not optimized since the result is likely not an integer number. */
break;
}
case NUMBER_ARITHMETIC_REMAINDER:
{
ecma_integer_value_t left_integer = ecma_get_integer_from_value (left_value);
ecma_integer_value_t right_integer = ecma_get_integer_from_value (right_value);
if (right_integer != 0)
{
ecma_integer_value_t result = left_integer % right_integer;
if (result != 0 || left_integer >= 0)
{
return ecma_make_integer_value (result);
}
}
break;
}
}
}
ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
ECMA_OP_TO_NUMBER_TRY_CATCH (num_left, left_value, ret_value);
@@ -154,20 +97,6 @@ ecma_value_t
opfunc_addition (ecma_value_t left_value, /**< left value */
ecma_value_t right_value) /**< right value */
{
if (ecma_are_values_integer_numbers (left_value, right_value))
{
ecma_integer_value_t left_integer = ecma_get_integer_from_value (left_value);
ecma_integer_value_t right_integer = ecma_get_integer_from_value (right_value);
return ecma_make_int32_value ((int32_t) (left_integer + right_integer));
}
if (ecma_is_value_number (left_value) && ecma_is_value_number (right_value))
{
ecma_number_t num_left = ecma_get_number_from_value (left_value);
ecma_number_t num_right = ecma_get_number_from_value (right_value);
return ecma_make_number_value (ecma_number_add (num_left, num_right));
}
bool free_left_value = false;
bool free_right_value = false;