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2020-03-16 release

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bellard
2020-09-06 19:02:03 +02:00
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doc/jsbignum.texi
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@@ -57,7 +57,7 @@ More precisely, the following modifications were made:
@item @code{with operators from} is not supported. Operator overloading is always enabled.
@item The dispatch is not based on a static @code{[[OperatorSet]]} field in all instances. Instead, a dynamic lookup the of the @code{Symbol.operatorSet} property is done. This property is typically added in the prototype of each object.
@item The dispatch is not based on a static @code{[[OperatorSet]]} field in all instances. Instead, a dynamic lookup of the @code{Symbol.operatorSet} property is done. This property is typically added in the prototype of each object.
@item @code{Operators.create(...dictionaries)} is used to create a new OperatorSet object. The @code{Operators} function is supported as an helper to be closer to the TC39 proposal.
@@ -119,7 +119,7 @@ Return the number of trailing zeros in the two's complement binary representatio
@section Introduction
This extension adds the @code{BigFloat} primitive type. The
@code{BigFloat} type represents floating point numbers are in base 2
@code{BigFloat} type represents floating point numbers in base 2
with the IEEE 754 semantics. A floating
point number is represented as a sign, mantissa and exponent. The
special values @code{NaN}, @code{+/-Infinity}, @code{+0} and @code{-0}
@@ -143,15 +143,13 @@ explicit.}. The status flags of the global environment cannot be
read@footnote{The rationale is to avoid side effects for the built-in
operators.}. The precision of the global environment is
@code{BigFloatEnv.prec}. The number of exponent bits of the global
environment is @code{BigFloatEnv.expBits}. If @code{BigFloatEnv.expBits} is
strictly smaller than the maximum allowed number of exponent bits
(@code{BigFloatEnv.expBitsMax}), then the global environment subnormal
flag is set to @code{true}. Otherwise it is set to @code{false};
environment is @code{BigFloatEnv.expBits}. The global environment
subnormal flag is set to @code{true}.
For example, @code{prec = 53} and @code{ expBits = 11} give exactly
the same precision as the IEEE 754 64 bit floating point. The
For example, @code{prec = 53} and @code{ expBits = 11} exactly give
the same precision as the IEEE 754 64 bit floating point format. The
default precision is @code{prec = 113} and @code{ expBits = 15} (IEEE
754 128 bit floating point).
754 128 bit floating point format).
The global floating point environment can only be modified temporarily
when calling a function (see @code{BigFloatEnv.setPrec}). Hence a
@@ -345,9 +343,8 @@ environment. The initial value is @code{113}.
@item expBits
Getter. Return the exponent size in bits of the global floating point
environment assuming an IEEE 754 representation. If @code{expBits <
expBitsMax}, then subnormal numbers are supported. The initial value
is @code{15}.
environment assuming an IEEE 754 representation. The initial value is
@code{15}.
@item setPrec(f, p[, e])
Set the precision of the global floating point environment to @code{p}
@@ -492,7 +489,7 @@ BigDecimal literals are decimal floating point numbers with a trailing
It returns @code{0m} if no parameter is provided. Otherwise the first
parameter is converted to a bigdecimal by using ToString(). Hence
Number value are not converted to their exact numerical value as
Number values are not converted to their exact numerical value as
BigDecimal.
@subsection Properties of the @code{BigDecimal} object
@@ -581,12 +578,12 @@ The following changes are made to the Javascript semantics:
@item The logical xor operator is still available with the @code{^^} operator.
@item The integer division operator can be overloaded by modifying the corresponding operator in @code{BigInt.prototype.[[OperatorSet]]}.
@item The integer power operator with a non zero negative exponent can be overloaded by modifying the corresponding operator in @code{BigInt.prototype.[[OperatorSet]]}.
@item The modulo operator (@code{%}) returns the Euclidian remainder (always positive) instead of the truncated remainder.
@item The integer division operator can be overloaded with @code{Operators.updateBigIntOperators(dictionary)}.
@item The integer power operator with a non zero negative exponent can be overloaded with @code{Operators.updateBigIntOperators(dictionary)}.
@end itemize
@bye