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Implementing Math.abs and Math.round built-ins.

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This commit is contained in:
Ruben Ayrapetyan 2014-09-23 17:21:46 +04:00
parent 4798807451
commit c5fd835931
3 changed files with 161 additions and 20 deletions
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107
src/libecmabuiltins/ecma-builtin-math-object.c
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@ -20,6 +20,7 @@
#include "ecma-gc.h"
#include "ecma-globals.h"
#include "ecma-helpers.h"
#include "ecma-number-arithmetic.h"
#include "ecma-objects.h"
#include "ecma-objects-general.h"
#include "ecma-try-catch-macro.h"
@ -153,7 +154,7 @@ JERRY_STATIC_ASSERT (sizeof (ecma_builtin_math_property_names) > sizeof (void*))
* The Math object's 'abs' routine
*
* See also:
* ECMA-262 v5, 15.
* ECMA-262 v5, 15.8.2.1
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.
@ -161,14 +162,38 @@ JERRY_STATIC_ASSERT (sizeof (ecma_builtin_math_property_names) > sizeof (void*))
static ecma_completion_value_t
ecma_builtin_math_object_abs (ecma_value_t arg) /**< routine's argument */
{
JERRY_UNIMPLEMENTED_REF_UNUSED_VARS (arg);
ecma_completion_value_t ret_value;
ECMA_TRY_CATCH (arg_num_value,
ecma_op_to_number (arg),
ret_value);
ecma_number_t *num_p = ecma_alloc_number ();
const ecma_number_t arg_num = *(ecma_number_t*) ECMA_GET_POINTER (arg_num_value.u.value.value);
if (ecma_number_is_nan (arg_num)
|| !ecma_number_is_negative (arg_num))
{
*num_p = arg_num;
}
else
{
*num_p = ecma_number_negate (arg_num);
}
ret_value = ecma_make_return_completion_value (ecma_make_number_value (num_p));
ECMA_FINALIZE (arg_num_value);
return ret_value;
} /* ecma_builtin_math_object_abs */
/**
* The Math object's 'acos' routine
*
* See also:
* ECMA-262 v5, 15.
* ECMA-262 v5, 15.8.2.2
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.
@ -183,7 +208,7 @@ ecma_builtin_math_object_acos (ecma_value_t arg) /**< routine's argument */
* The Math object's 'asin' routine
*
* See also:
* ECMA-262 v5, 15.
* ECMA-262 v5, 15.8.2.3
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.
@ -198,7 +223,7 @@ ecma_builtin_math_object_asin (ecma_value_t arg) /**< routine's argument */
* The Math object's 'atan' routine
*
* See also:
* ECMA-262 v5, 15.
* ECMA-262 v5, 15.8.2.4
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.
@ -213,7 +238,7 @@ ecma_builtin_math_object_atan (ecma_value_t arg) /**< routine's argument */
* The Math object's 'atan2' routine
*
* See also:
* ECMA-262 v5, 15.
* ECMA-262 v5, 15.8.2.5
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.
@ -229,7 +254,7 @@ ecma_builtin_math_object_atan2 (ecma_value_t arg1, /**< first routine's argument
* The Math object's 'ceil' routine
*
* See also:
* ECMA-262 v5, 15.
* ECMA-262 v5, 15.8.2.6
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.
@ -244,7 +269,7 @@ ecma_builtin_math_object_ceil (ecma_value_t arg) /**< routine's argument */
* The Math object's 'cos' routine
*
* See also:
* ECMA-262 v5, 15.
* ECMA-262 v5, 15.8.2.7
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.
@ -259,7 +284,7 @@ ecma_builtin_math_object_cos (ecma_value_t arg) /**< routine's argument */
* The Math object's 'exp' routine
*
* See also:
* ECMA-262 v5, 15.
* ECMA-262 v5, 15.8.2.8
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.
@ -274,7 +299,7 @@ ecma_builtin_math_object_exp (ecma_value_t arg) /**< routine's argument */
* The Math object's 'floor' routine
*
* See also:
* ECMA-262 v5, 15.
* ECMA-262 v5, 15.8.2.9
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.
@ -289,7 +314,7 @@ ecma_builtin_math_object_floor (ecma_value_t arg) /**< routine's argument */
* The Math object's 'log' routine
*
* See also:
* ECMA-262 v5, 15.
* ECMA-262 v5, 15.8.2.10
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.
@ -304,7 +329,7 @@ ecma_builtin_math_object_log (ecma_value_t arg) /**< routine's argument */
* The Math object's 'max' routine
*
* See also:
* ECMA-262 v5, 15.
* ECMA-262 v5, 15.8.2.11
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.
@ -320,7 +345,7 @@ ecma_builtin_math_object_max (ecma_value_t args[], /**< arguments list */
* The Math object's 'min' routine
*
* See also:
* ECMA-262 v5, 15.
* ECMA-262 v5, 15.8.2.12
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.
@ -336,7 +361,7 @@ ecma_builtin_math_object_min (ecma_value_t args[], /**< arguments list */
* The Math object's 'pow' routine
*
* See also:
* ECMA-262 v5, 15.
* ECMA-262 v5, 15.8.2.13
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.
@ -352,7 +377,7 @@ ecma_builtin_math_object_pow (ecma_value_t arg1, /**< first routine's argument *
* The Math object's 'random' routine
*
* See also:
* ECMA-262 v5, 15.
* ECMA-262 v5, 15.8.2.14
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.
@ -367,7 +392,7 @@ ecma_builtin_math_object_random (void)
* The Math object's 'round' routine
*
* See also:
* ECMA-262 v5, 15.
* ECMA-262 v5, 15.8.2.15
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.
@ -375,14 +400,56 @@ ecma_builtin_math_object_random (void)
static ecma_completion_value_t
ecma_builtin_math_object_round (ecma_value_t arg) /**< routine's argument */
{
JERRY_UNIMPLEMENTED_REF_UNUSED_VARS (arg);
ecma_completion_value_t ret_value;
ECMA_TRY_CATCH (arg_num_value,
ecma_op_to_number (arg),
ret_value);
ecma_number_t *num_p = ecma_alloc_number ();
const ecma_number_t arg_num = *(ecma_number_t*) ECMA_GET_POINTER (arg_num_value.u.value.value);
if (ecma_number_is_nan (arg_num)
|| ecma_number_is_zero (arg_num)
|| ecma_number_is_infinity (arg_num))
{
*num_p = arg_num;
}
else if (ecma_number_is_negative (arg_num)
&& arg_num >= -0.5f)
{
*num_p = ecma_number_negate (0.0f);
}
else
{
const ecma_number_t up_half = arg_num + 0.5f;
const ecma_number_t down_half = arg_num - 0.5f;
const ecma_number_t up_rounded = up_half - ecma_op_number_remainder (up_half, 1);
const ecma_number_t down_rounded = down_half - ecma_op_number_remainder (down_half, 1);
if (up_rounded - arg_num <= arg_num - down_rounded)
{
*num_p = up_rounded;
}
else
{
*num_p = down_rounded;
}
}
ret_value = ecma_make_return_completion_value (ecma_make_number_value (num_p));
ECMA_FINALIZE (arg_num_value);
return ret_value;
} /* ecma_builtin_math_object_round */
/**
* The Math object's 'sin' routine
*
* See also:
* ECMA-262 v5, 15.
* ECMA-262 v5, 15.8.2.16
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.
@ -397,7 +464,7 @@ ecma_builtin_math_object_sin (ecma_value_t arg) /**< routine's argument */
* The Math object's 'sqrt' routine
*
* See also:
* ECMA-262 v5, 15.
* ECMA-262 v5, 15.8.2.17
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.
@ -412,7 +479,7 @@ ecma_builtin_math_object_sqrt (ecma_value_t arg) /**< routine's argument */
* The Math object's 'tan' routine
*
* See also:
* ECMA-262 v5, 15.
* ECMA-262 v5, 15.8.2.18
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.

37
tests/jerry/math_abs.js Normal file
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@ -0,0 +1,37 @@
// Copyright 2014 Samsung Electronics Co., Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
var nan = NaN;
var p_zero = 0.0;
var m_zero = -p_zero;
var p_inf = Infinity;
var m_inf = -p_inf;
assert (isNaN(Math['abs'](NaN)));
assert (Math['abs'](p_zero) === p_zero);
assert (Math['abs'](m_zero) === p_zero);
assert (Math['abs'](p_inf) === p_inf);
assert (Math['abs'](m_inf) === p_inf);
assert (Math['abs'](0.5) === 0.5);
assert (Math['abs'](-0.5) === 0.5);
assert (Math['abs'](1.2) === 1.2);
assert (Math['abs'](1.5) === 1.5);
assert (Math['abs'](0.7) === 0.7);
assert (Math['abs'](0.2) === 0.2);
assert (Math['abs'](-0.2) === 0.2);
assert (Math['abs'](-0.7) === 0.7);
assert (Math['abs'](-1.2) === 1.2);
assert (Math['abs'](-1.7) === 1.7);
assert (Math['abs'](-1.5) === 1.5);

37
tests/jerry/math_round.js Normal file
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@ -0,0 +1,37 @@
// Copyright 2014 Samsung Electronics Co., Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
var nan = NaN;
var p_zero = 0.0;
var m_zero = -p_zero;
var p_inf = Infinity;
var m_inf = -p_inf;
assert (isNaN(Math['round'](NaN)));
assert (Math['round'](p_zero) === p_zero);
assert (Math['round'](m_zero) === m_zero);
assert (Math['round'](p_inf) === p_inf);
assert (Math['round'](m_inf) === m_inf);
assert (Math['round'](0.5) === 1.0);
assert (Math['round'](-0.5) === -0.0);
assert (Math['round'](1.2) === 1.0);
assert (Math['round'](1.5) === 2.0);
assert (Math['round'](0.7) === 1.0);
assert (Math['round'](0.2) === 0.0);
assert (Math['round'](-0.2) === -0.0);
assert (Math['round'](-0.7) === -1.0);
assert (Math['round'](-1.2) === -1.0);
assert (Math['round'](-1.7) === -2.0);
assert (Math['round'](-1.5) === -1.0);