Examples of ptolemy.math.Precision$IntegerFractionPrecisionFormat

ptolemy.math.Precision
Defines a Precision string format using the INTEGER.FRACTION precision format. The INTEGER value specifies the number of integer bits and the FRACTION value specifies the number of fractional bits. Negative values are allowed for either INTEGER or FRACTION (but not both).
This format supports the specification of either signed or unsigned values. The character 'U' must precede the integer.fraction format to specify an unsigned value. An 'S' character may be applied to specify a signed number. If no 'U' or 'S' signed specification is provided, the precision will default to a signed value.
The exponent in this format is set to -fraction.
Parenthesis or brackets are optional around this specification. Examples:
- (3.5)
- (U2.1)
- [S2.1]
- [S6.-2]
- S-2.4
When printed, this format will always use parenthesis and only use the signed format specification for unsigned numbers (i.e. 'U' used for unsigned numbers and NO 'S' for signed numbers).

     *  fractional part.
     */
    public FixMatrixToken() {
        _rowCount = 1;
        _columnCount = 1;
        _precision = new Precision(32, 32);
        _value = new FixPoint[1][1];
        _value[0][0] = Quantizer.round(0.0, _precision);
    }

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     *   is invalid.
     */
    public FixToken(double value, int numberOfBits, int integerBits)
            throws IllegalArgumentException {
        try {
            Precision precision = new Precision(numberOfBits, integerBits);
            FixPointQuantization q = new FixPointQuantization(precision,
                    Overflow.SATURATE, Rounding.NEAREST);
            _value = new FixPoint(value, q);
        } catch (NumberFormatException e) {
            throw new IllegalArgumentException(e.getMessage());

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        if (!_isUnitless()) {
            unitString = " * " + unitsString();
        }


        Precision precision = _value.getPrecision();
        return "fix(" + _value.toString() + "," + precision.getNumberOfBits()
                + "," + precision.getIntegerBitLength() + ")" + unitString;
    }

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    /** Construct a new fix type, with no integer bits and no
     * fractional bits.  This (rather useless) type represents the
     * bottom of the FixPoint type lattice.
     */
    public FixType() {
        _precision = new Precision(0, 0);
    }

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     *  @return A new type, or BaseType.GENERAL, if the operation does
     *  not make sense for the given types.
     */
    public Type add(Type rightArgumentType) {
        if (rightArgumentType instanceof FixType) {
            Precision rPrecision = ((FixType) rightArgumentType).getPrecision();
            Precision newPrecision = FixPoint.addPrecision(rPrecision,
                    _precision);
            FixType returnType = new FixType(newPrecision);
            return returnType;
        } else {
            return TypeLattice.leastUpperBound(this, rightArgumentType);

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     *  not make sense for the given types.
     */
    public Type divide(Type rightArgumentType) {
        if (rightArgumentType instanceof FixType) {
            if (rightArgumentType instanceof FixType) {
                Precision rPrecision = ((FixType) rightArgumentType)
                        .getPrecision();
                Precision newPrecision = FixPoint.dividePrecision(rPrecision,
                        _precision);
                FixType returnType = new FixType(newPrecision);
                return returnType;
            } else {
                return TypeLattice.leastUpperBound(this, rightArgumentType);

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     */
    public boolean equals(Object object) {
        if (!(object instanceof FixType)) {
            return false;
        }
        Precision precision = ((FixType) object).getPrecision();
        if (!(precision.equals(_precision))) {
            return false;
        }


        return true;
    }

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     *  @return A new type, or BaseType.GENERAL, if the operation does
     *  not make sense for the given types.
     */
    public Type multiply(Type rightArgumentType) {
        if (rightArgumentType instanceof FixType) {
            Precision rPrecision = ((FixType) rightArgumentType).getPrecision();
            Precision newPrecision = FixPoint.multiplyPrecision(rPrecision,
                    _precision);
            FixType returnType = new FixType(newPrecision);
            return returnType;
        } else {
            return TypeLattice.leastUpperBound(this, rightArgumentType);

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     *  @return A new type, or BaseType.GENERAL, if the operation does
     *  not make sense for the given types.
     */
    public Type subtract(Type rightArgumentType) {
        if (rightArgumentType instanceof FixType) {
            Precision rPrecision = ((FixType) rightArgumentType).getPrecision();
            Precision newPrecision = FixPoint.subtractPrecision(rPrecision,
                    _precision);
            FixType returnType = new FixType(newPrecision);
            return returnType;
        } else {
            return TypeLattice.leastUpperBound(this, rightArgumentType);

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        if (!(type instanceof FixType)) {
            throw new IllegalArgumentException("FixType._compare: "
                    + "The argument is not a FixType.");
        }


        Precision precision = ((FixType) type).getPrecision();


        int fractionBits1 = _precision.getFractionBitLength();
        int fractionBits2 = precision.getFractionBitLength();
        int integerBits1 = _precision.getFractionBitLength();
        int integerBits2 = precision.getFractionBitLength();
        boolean signBit1 = _precision.isSigned();
        boolean signBit2 = precision.isSigned();
        int compareBits1, compareBits2;


        if (_precision.equals(precision)) {
            return CPO.SAME;
        } else if (signBit1 == signBit2) {

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ptolemy.actor.lib.conversions.DoubleToFix

ptolemy.actor.lib.conversions.FixToFix

ptolemy.actor.lib.vhdl.Concat

ptolemy.actor.lib.vhdl.FixComparator

ptolemy.actor.lib.vhdl.FixConst

ptolemy.actor.lib.vhdl.FixSequence

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ptolemy.actor.lib.vhdl.LogicalNot

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