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Improve float number handling and conversion (#4820)

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Fixes #4739.

JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai dbatyai@inf.u-szeged.hu
This commit is contained in:
Dániel Bátyai
2021-12-03 12:58:37 +01:00
committed by GitHub
parent a1c1d42710
commit 81d2319144
30 changed files with 1022 additions and 1603 deletions
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jerry-core/ecma/builtin-objects/ecma-builtin-math.c
+23 -17
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@@ -22,7 +22,6 @@
#include "ecma-gc.h"
#include "ecma-globals.h"
#include "ecma-helpers.h"
#include "ecma-number-arithmetic.h"
#include "ecma-objects-general.h"
#include "ecma-objects.h"
@@ -438,30 +437,37 @@ ecma_builtin_math_dispatch_routine (uint8_t builtin_routine_id, /**< built-in wi
#endif /* JERRY_ESNEXT */
case ECMA_MATH_OBJECT_ROUND:
{
if (ecma_number_is_nan (x) || ecma_number_is_zero (x) || ecma_number_is_infinity (x) || fmod (x, 1.0) == 0)
if (ecma_number_is_nan (x) || ecma_number_is_zero (x) || ecma_number_is_infinity (x))
{
/* Do nothing. */
break;
}
else if (ecma_number_is_negative (x) && x >= -ECMA_NUMBER_HALF)
{
x = -ECMA_NUMBER_ZERO;
}
else
{
const ecma_number_t up_half = x + ECMA_NUMBER_HALF;
const ecma_number_t down_half = x - ECMA_NUMBER_HALF;
const ecma_number_t up_rounded = up_half - ecma_op_number_remainder (up_half, ECMA_NUMBER_ONE);
const ecma_number_t down_rounded = down_half - ecma_op_number_remainder (down_half, ECMA_NUMBER_ONE);
if (up_rounded - x <= x - down_rounded)
ecma_number_t fraction = fmod (x, ECMA_NUMBER_ONE);
if (ecma_number_is_zero (fraction))
{
break;
}
if (ecma_number_is_negative (x))
{
if (x >= -ECMA_NUMBER_HALF)
{
x = up_rounded;
x = -ECMA_NUMBER_ZERO;
break;
}
else
if (fraction < -ECMA_NUMBER_HALF)
{
x = down_rounded;
x -= ECMA_NUMBER_HALF;
}
}
else if (fraction >= ECMA_NUMBER_HALF)
{
x += ECMA_NUMBER_HALF;
}
x = ecma_number_trunc (x);
break;
}
case ECMA_MATH_OBJECT_SIN: