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Remove unused functions from ecma-helpers-number.

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JerryScript-DCO-1.0-Signed-off-by: Zsolt Borbély zsborbely.u-szeged@partner.samsung.com
This commit is contained in:
Zsolt Borbély 2016-02-10 08:51:23 +01:00
parent 6fd1f780e1
commit d35bc4114b
2 changed files with 0 additions and 178 deletions
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174
jerry-core/ecma/base/ecma-helpers-number.cpp
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@ -742,180 +742,6 @@ ecma_number_divide (ecma_number_t left_num, /**< left operand */
return left_num / right_num; return left_num / right_num;
} /* ecma_number_divide */ } /* ecma_number_divide */
/**
* Helper for calculating absolute value
*
* Warning:
* argument should be valid number
*
* @return absolute value of the argument
*/
ecma_number_t
ecma_number_abs (ecma_number_t num) /**< valid number */
{
JERRY_ASSERT (!ecma_number_is_nan (num));
if (num < 0)
{
return ecma_number_negate (num);
}
else
{
return num;
}
} /* ecma_number_abs */
/**
* Helper for calculating square root using Newton's method.
*
* @return square root of specified number
*/
ecma_number_t
ecma_number_sqrt (ecma_number_t num) /**< valid finite
positive number */
{
JERRY_ASSERT (!ecma_number_is_nan (num));
JERRY_ASSERT (!ecma_number_is_infinity (num));
JERRY_ASSERT (!ecma_number_is_negative (num));
ecma_number_t x = ECMA_NUMBER_ONE;
ecma_number_t diff = ecma_number_make_infinity (false);
while (ecma_number_divide (diff, x) > ecma_number_relative_eps)
{
ecma_number_t x_next = ecma_number_multiply (ECMA_NUMBER_HALF,
(ecma_number_add (x,
ecma_number_divide (num, x))));
diff = ecma_number_substract (x, x_next);
if (diff < 0)
{
diff = ecma_number_negate (diff);
}
x = x_next;
}
return x;
} /* ecma_number_sqrt */
/**
* Helper for calculating natural logarithm.
*
* @return natural logarithm of specified number
*/
ecma_number_t
ecma_number_ln (ecma_number_t num) /**< valid finite
positive number */
{
JERRY_ASSERT (!ecma_number_is_nan (num));
JERRY_ASSERT (!ecma_number_is_infinity (num));
JERRY_ASSERT (!ecma_number_is_negative (num));
if (num == ECMA_NUMBER_ONE)
{
return ECMA_NUMBER_ZERO;
}
/* Taylor series of ln (1 + x) around x = 0 is x - x^2/2 + x^3/3 - x^4/4 + ... */
ecma_number_t x = num;
ecma_number_t multiplier = ECMA_NUMBER_ONE;
while (ecma_number_abs (ecma_number_substract (x,
ECMA_NUMBER_ONE)) > ECMA_NUMBER_HALF)
{
x = ecma_number_sqrt (x);
multiplier = ecma_number_multiply (multiplier, ECMA_NUMBER_TWO);
}
x = ecma_number_substract (x, ECMA_NUMBER_ONE);
ecma_number_t sum = ECMA_NUMBER_ZERO;
ecma_number_t next_power = x;
ecma_number_t next_divisor = ECMA_NUMBER_ONE;
ecma_number_t diff;
do
{
ecma_number_t next_sum = ecma_number_add (sum,
ecma_number_divide (next_power,
next_divisor));
next_divisor = ecma_number_add (next_divisor, ECMA_NUMBER_ONE);
next_power = ecma_number_multiply (next_power, x);
next_power = ecma_number_negate (next_power);
diff = ecma_number_abs (ecma_number_substract (sum, next_sum));
sum = next_sum;
}
while (ecma_number_abs (ecma_number_divide (diff,
sum)) > ecma_number_relative_eps);
sum = ecma_number_multiply (sum, multiplier);
return sum;
} /* ecma_number_ln */
/**
* Helper for calculating exponent of a number
*
* @return exponent of specified number
*/
ecma_number_t
ecma_number_exp (ecma_number_t num) /**< valid finite number */
{
JERRY_ASSERT (!ecma_number_is_nan (num));
JERRY_ASSERT (!ecma_number_is_infinity (num));
bool invert = false;
ecma_number_t pow_e;
if (ecma_number_is_negative (num))
{
invert = true;
pow_e = ecma_number_negate (num);
}
else
{
pow_e = num;
}
/* Taylor series of e^x is 1 + x/1! + x^2/2! + x^3/3! + ... + x^n/n! + ... */
ecma_number_t sum = ECMA_NUMBER_ONE;
ecma_number_t next_addendum = ecma_number_divide (pow_e, ECMA_NUMBER_ONE);
ecma_number_t next_factorial_factor = ECMA_NUMBER_ONE;
ecma_number_t diff = ecma_number_make_infinity (false);
while (ecma_number_divide (diff, sum) > ecma_number_relative_eps)
{
ecma_number_t next_sum = ecma_number_add (sum, next_addendum);
next_factorial_factor = ecma_number_add (next_factorial_factor, ECMA_NUMBER_ONE);
next_addendum = ecma_number_multiply (next_addendum, pow_e);
next_addendum = ecma_number_divide (next_addendum, next_factorial_factor);
diff = ecma_number_substract (sum, next_sum);
if (diff < 0)
{
diff = ecma_number_negate (diff);
}
sum = next_sum;
}
if (invert)
{
sum = ecma_number_divide (ECMA_NUMBER_ONE, sum);
}
return sum;
} /* ecma_number_exp */
/** /**
* @} * @}
* @} * @}

4
jerry-core/ecma/base/ecma-helpers.h
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@ -161,10 +161,6 @@ extern ecma_number_t ecma_number_add (ecma_number_t, ecma_number_t);
extern ecma_number_t ecma_number_substract (ecma_number_t, ecma_number_t); extern ecma_number_t ecma_number_substract (ecma_number_t, ecma_number_t);
extern ecma_number_t ecma_number_multiply (ecma_number_t, ecma_number_t); extern ecma_number_t ecma_number_multiply (ecma_number_t, ecma_number_t);
extern ecma_number_t ecma_number_divide (ecma_number_t, ecma_number_t); extern ecma_number_t ecma_number_divide (ecma_number_t, ecma_number_t);
extern ecma_number_t ecma_number_sqrt (ecma_number_t);
extern ecma_number_t ecma_number_abs (ecma_number_t);
extern ecma_number_t ecma_number_ln (ecma_number_t);
extern ecma_number_t ecma_number_exp (ecma_number_t);
extern void ecma_number_to_decimal (ecma_number_t, uint64_t *, int32_t *, int32_t *); extern void ecma_number_to_decimal (ecma_number_t, uint64_t *, int32_t *, int32_t *);
/* ecma-helpers-values-collection.cpp */ /* ecma-helpers-values-collection.cpp */