# Class Float16

java.lang.Object
java.lang.Number
jdk.incubator.vector.Float16

All Implemented Interfaces:
  `Serializable, Comparable<Float16>`

public final class Float16 extends Number implements Comparable<Float16>
The `Float16` is a class holding 16-bit data in IEEE 754 binary16 format.

Binary16 Format:
S EEEEE MMMMMMMMMM
Sign - 1 bit
Exponent - 5 bits
Significand - 10 bits (does not include the implicit bit inferred from the exponent, see `PRECISION`)

Unless otherwise specified, the methods in this class use a rounding policy (JLS 15.4) of round to nearest.

This is a value-based class; programmers should treat instances that are equal as interchangeable and should not use instances for synchronization, or unpredictable behavior may occur. For example, in a future release, synchronization may fail.

## Floating-point Equality, Equivalence, and Comparison

The class `java.lang.Double` has a discussion of equality, equivalence, and comparison of floating-point values that is equally applicable to `Float16` values.

## Decimal ↔ Binary Conversion Issues

The discussion of binary to decimal conversion issues in `java.lang.Double` is also applicable to `Float16` values.

API Note:
  The methods in this class generally have analogous methods in either `Float`/`Double` or `Math`/`StrictMath`. Unless otherwise specified, the handling of special floating-point values such as NaN values, infinities, and signed zeros of methods in this class is wholly analogous to the handling of equivalent cases by methods in `Float`, `Double`, `Math`, etc.
Since:
  24
See Also:
  - IEEE Standard for Floating-Point Arithmetic
  - Serialized Form

## Field Summary

Fields
Modifier and Type
Field
Description
`static final int`
`BYTES`
The number of bytes used to represent a `Float16` value, 2.
`static final int`
`MAX_EXPONENT`
Maximum exponent a finite `Float16` variable may have, 15.
`static final Float16`
`MAX_VALUE`
A constant holding the largest positive finite value of type `Float16`, (2-2-10)·215, numerically equal to 65504.0.
`static final int`
`MIN_EXPONENT`
Minimum exponent a normalized `Float16` variable may have, -14.
`static final Float16`
`MIN_NORMAL`
A constant holding the smallest positive normal value of type `Float16`, 2-14.
`static final Float16`
`MIN_VALUE`
A constant holding the smallest positive nonzero value of type `Float16`, 2-24.
`static final Float16`
`NaN`
A constant holding a Not-a-Number (NaN) value of type `Float16`.
`static final Float16`
`NEGATIVE_INFINITY`
A constant holding the negative infinity of type `Float16`.
`static final Float16`
`POSITIVE_INFINITY`
A constant holding the positive infinity of type `Float16`.
`static final int`
`PRECISION`
The number of bits in the significand of a `Float16` value, 11.
`static final int`
`SIZE`
The number of bits used to represent a `Float16` value, 16.

## Method Summary

Modifier and Type
Method
Description
`static Float16`
`abs(Float16 f16)`
Returns the absolute value of the argument.
`static Float16`
`add(Float16 addend, Float16 augend)`
Adds two `Float16` values together as per the `+` operator semantics using the round to nearest rounding policy.
`byte`
`byteValue()`
Returns the value of this `Float16` as a `byte` after a narrowing primitive conversion.
`static int`
`compare(Float16 f1, Float16 f2)`
Compares the two specified `Float16` values.
`int`
`compareTo(Float16 anotherFloat16)`
Compares two `Float16` objects numerically.
`static Float16`
`copySign(Float16 magnitude, Float16 sign)`
Returns the first floating-point argument with the sign of the second floating-point argument.
`static Float16`
`divide(Float16 dividend, Float16 divisor)`
Divides two `Float16` values as per the `/` operator semantics using the round to nearest rounding policy.
`double`
`doubleValue()`
Returns the value of this `Float16` as a `double` after a widening primitive conversion.
`boolean`
`equals(Object obj)`
Compares this object against the specified object.
`static short`
`float16ToRawShortBits(Float16 f16)`
Returns a representation of the specified floating-point value according to the IEEE 754 floating-point binary16 bit layout.
`static short`
`float16ToShortBits(Float16 f16)`
Returns a representation of the specified floating-point value according to the IEEE 754 floating-point binary16 bit layout.
`float`
`floatValue()`
Returns the value of this `Float16` as a `float` after a widening primitive conversion.
`static Float16`
`fma(Float16 a, Float16 b, Float16 c)`
Returns the fused multiply add of the three arguments; that is, returns the exact product of the first two arguments summed with the third argument and then rounded once to the nearest `Float16`.
`static int`
`getExponent(Float16 f16)`
Returns the unbiased exponent used in the representation of a `Float16`.
`int`
`hashCode()`
Returns a hash code for this `Float16` object.
`static int`
`hashCode(Float16 value)`
Returns a hash code for a `Float16` value; compatible with `Float16.hashCode()`.
`int`
`intValue()`
Returns the value of this `Float16` as an `int` after a narrowing primitive conversion.
`static boolean`
`isFinite(Float16 f16)`
Returns `true` if the argument is a finite floating-point value; returns `false` otherwise (for NaN and infinity arguments).
`static boolean`
`isInfinite(Float16 f16)`
Returns `true` if the specified number is infinitely large in magnitude, `false` otherwise.
`static boolean`
`isNaN(Float16 f16)`
Returns `true` if the specified number is a Not-a-Number (NaN) value, `false` otherwise.
`long`
`longValue()`
Returns value of this `Float16` as a `long` after a narrowing primitive conversion.
`static Float16`
`max(Float16 a, Float16 b)`
Returns the larger of two `Float16` values.
`static Float16`
`min(Float16 a, Float16 b)`
Returns the smaller of two `Float16` values.
`static Float16`
`multiply(Float16 multiplier, Float16 multiplicand)`
Multiplies two `Float16` values as per the `*` operator semantics using the round to nearest rounding policy.
`static Float16`
`negate(Float16 f16)`
Returns the negation of the argument.
`static Float16`
`nextDown(Float16 v)`
Returns the floating-point value adjacent to `v` in the direction of negative infinity.
`static Float16`
`nextUp(Float16 v)`
Returns the floating-point value adjacent to `v` in the direction of positive infinity.
`static Float16`
`scalb(Float16 v, int scaleFactor)`
Returns `v` × 2`scaleFactor` rounded as if performed by a single correctly rounded floating-point multiply.
`static Float16`
`shortBitsToFloat16(short bits)`
Returns the `Float16` value corresponding to a given bit representation.
`short`
`shortValue()`
Returns the value of this `Float16` as a `short` after a narrowing primitive conversion.
`static Float16`
`signum(Float16 f)`
Returns the signum function of the argument; zero if the argument is zero, 1.0 if the argument is greater than zero, -1.0 if the argument is less than zero.
`static Float16`
`sqrt(Float16 radicand)`
Returns the square root of the operand.
`static Float16`
`subtract(Float16 minuend, Float16 subtrahend)`
Subtracts two `Float16` values as per the `-` operator semantics using the round to nearest rounding policy.
`static String`
`toHexString(Float16 f16)`
Returns a hexadecimal string representation of the `Float16` argument.
`String`
`toString()`
Returns a string representation of this `Float16`.
`static String`
`toString(Float16 f16)`
Returns a string representation of the `Float16` argument.
`static Float16`
`ulp(Float16 f16)`
Returns the size of an ulp of the argument.
`static Float16`
`valueOf(double d)`
Returns a `Float16` value rounded from the `double` argument using the round to nearest rounding policy.
`static Float16`
`valueOf(float f)`
Returns a `Float16` value rounded from the `float` argument using the round to nearest rounding policy.
`static Float16`
`valueOf(int value)`
Returns the value of an `int` converted to `Float16`.
`static Float16`
`valueOf(long value)`
Returns the value of a `long` converted to `Float16`.
`static Float16`
`valueOf(String s)`
Returns a `Float16` holding the floating-point value represented by the argument string.
`static Float16`
`valueOf(BigDecimal v)`
Returns a `Float16` value rounded from the `BigDecimal` argument using the round to nearest rounding policy.

### Methods declared in class Object

`clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

## Field Details

### POSITIVE_INFINITY

public static final Float16 POSITIVE_INFINITY
A constant holding the positive infinity of type `Float16`.

See Also:
  - `Float.POSITIVE_INFINITY`
  - `Double.POSITIVE_INFINITY`

### NEGATIVE_INFINITY

public static final Float16 NEGATIVE_INFINITY
A constant holding the negative infinity of type `Float16`.

See Also:
  - `Float.NEGATIVE_INFINITY`
  - `Double.NEGATIVE_INFINITY`

### NaN

public static final Float16 NaN
A constant holding a Not-a-Number (NaN) value of type `Float16`.

See Also:
  - `Float.NaN`
  - `Double.NaN`

### MAX_VALUE

public static final Float16 MAX_VALUE
A constant holding the largest positive finite value of type `Float16`, (2-2-10)·215, numerically equal to 65504.0.

See Also:
  - `Float.MAX_VALUE`
  - `Double.MAX_VALUE`

### MIN_NORMAL

public static final Float16 MIN_NORMAL
A constant holding the smallest positive normal value of type `Float16`, 2-14.

See Also:
  - `Float.MIN_NORMAL`
  - `Double.MIN_NORMAL`

### MIN_VALUE

public static final Float16 MIN_VALUE
A constant holding the smallest positive nonzero value of type `Float16`, 2-24.

See Also:
  - `Float.MIN_VALUE`
  - `Double.MIN_VALUE`

### SIZE

public static final int SIZE
The number of bits used to represent a `Float16` value, 16.

See Also:
  - `Float.SIZE`
  - `Double.SIZE`
  - Constant Field Values

### PRECISION

public static final int PRECISION
The number of bits in the significand of a `Float16` value, 11. This corresponds to parameter N in section 4.2.3 of The Java Language Specification.

See Also:
  - `Float.PRECISION`
  - `Double.PRECISION`
  - Constant Field Values

### MAX_EXPONENT

public static final int MAX_EXPONENT
Maximum exponent a finite `Float16` variable may have, 15. It is equal to the value returned by `Float16.getExponent(Float16.MAX_VALUE)`.

See Also:
  - `Float.MAX_EXPONENT`
  - `Double.MAX_EXPONENT`
  - Constant Field Values

### MIN_EXPONENT

public static final int MIN_EXPONENT
Minimum exponent a normalized `Float16` variable may have, -14. It is equal to the value returned by `Float16.getExponent(Float16.MIN_NORMAL)`.

See Also:
  - `Float.MIN_EXPONENT`
  - `Double.MIN_EXPONENT`
  - Constant Field Values

### BYTES

public static final int BYTES
The number of bytes used to represent a `Float16` value, 2.

See Also:
  - `Float.BYTES`
  - `Double.BYTES`
  - Constant Field Values

## Method Details

### toString

public static String toString(Float16 f16)
Returns a string representation of the `Float16` argument. The behavior of this method is analogous to `Float.toString(float)` in the handling of special values (signed zeros, infinities, and NaN) and the generation of a decimal string that will convert back to the argument value.

Parameters:
  `f16` - the `Float16` to be converted.
Returns:
  a string representation of the argument.
See Also:
  - `Float.toString(float)`

### toHexString

public static String toHexString(Float16 f16)
Returns a hexadecimal string representation of the `Float16` argument. The behavior of this class is analogous to `Float.toHexString(float)` except that an exponent value of `"p-14"` is used for subnormal `Float16` values.

API Note:
  This method corresponds to the convertToHexCharacter operation defined in IEEE 754.
Parameters:
  `f16` - the `Float16` to be converted.
Returns:
  a hex string representation of the argument.
See Also:
  - `Float.toHexString(float)`
  - `Double.toHexString(double)`

### valueOf

public static Float16 valueOf(int value)
Returns the value of an `int` converted to `Float16`.

API Note:
  This method corresponds to the convertFromInt operation defined in IEEE 754.
Parameters:
  `value` - an `int` value.
Returns:
  the value of an `int` converted to `Float16`

### valueOf

public static Float16 valueOf(long value)
Returns the value of a `long` converted to `Float16`.

API Note:
  This method corresponds to the convertFromInt operation defined in IEEE 754.
Parameters:
  `value` - a `long` value.
Returns:
  the value of a `long` converted to `Float16`

### valueOf

public static Float16 valueOf(float f)
Returns a `Float16` value rounded from the `float` argument using the round to nearest rounding policy.

API Note:
  This method corresponds to the convertFormat operation defined in IEEE 754.
Parameters:
  `f` - a `float`
Returns:
  a `Float16` value rounded from the `float` argument using the round to nearest rounding policy

### valueOf

public static Float16 valueOf(double d)
Returns a `Float16` value rounded from the `double` argument using the round to nearest rounding policy.

API Note:
  This method corresponds to the convertFormat operation defined in IEEE 754.
Parameters:
  `d` - a `double`
Returns:
  a `Float16` value rounded from the `double` argument using the round to nearest rounding policy

### valueOf

public static Float16 valueOf(String s) throws NumberFormatException
Returns a `Float16` holding the floating-point value represented by the argument string. The grammar of strings accepted by this method is the same as that accepted by `Double.valueOf(String)`. The rounding policy is also analogous to the one used by that method, a valid input is regarded as an exact numerical value that is rounded once to the nearest representable `Float16` value.

API Note:
  This method corresponds to the convertFromDecimalCharacter and convertFromHexCharacter operations defined in IEEE 754.
Parameters:
  `s` - the string to be parsed.
Returns:
  the `Float16` value represented by the string argument.
Throws:
  `NullPointerException` - if the string is null
  `NumberFormatException` - if the string does not contain a parsable `Float16`.
See Also:
  - `Float.valueOf(String)`

### valueOf

public static Float16 valueOf(BigDecimal v)
Returns a `Float16` value rounded from the `BigDecimal` argument using the round to nearest rounding policy.

Parameters:
  `v` - a `BigDecimal`
Returns:
  a `Float16` value rounded from the `BigDecimal` argument using the round to nearest rounding policy

### isNaN

public static boolean isNaN(Float16 f16)
Returns `true` if the specified number is a Not-a-Number (NaN) value, `false` otherwise.

API Note:
  This method corresponds to the isNaN operation defined in IEEE 754.
Parameters:
  `f16` - the value to be tested.
Returns:
  `true` if the argument is NaN; `false` otherwise.
See Also:
  - `Float.isNaN(float)`
  - `Double.isNaN(double)`

### isInfinite

public static boolean isInfinite(Float16 f16)
Returns `true` if the specified number is infinitely large in magnitude, `false` otherwise.

API Note:
  This method corresponds to the isInfinite operation defined in IEEE 754.
Parameters:
  `f16` - the value to be tested.
Returns:
  `true` if the argument is positive infinity or negative infinity; `false` otherwise.
See Also:
  - `Float.isInfinite(float)`
  - `Double.isInfinite(double)`

### isFinite

public static boolean isFinite(Float16 f16)
Returns `true` if the argument is a finite floating-point value; returns `false` otherwise (for NaN and infinity arguments).

API Note:
  This method corresponds to the isFinite operation defined in IEEE 754.
Parameters:
  `f16` - the `Float16` value to be tested
Returns:
  `true` if the argument is a finite floating-point value, `false` otherwise.
See Also:
  - `Float.isFinite(float)`
  - `Double.isFinite(double)`

### byteValue

public byte byteValue()
Returns the value of this `Float16` as a `byte` after a narrowing primitive conversion.

Overrides:
  `byteValue` in class `Number`
Returns:
  the value of this `Float16` as a `byte` after a narrowing primitive conversion
See Java Language Specification:
  5.1.3 Narrowing Primitive Conversion

### toString

public String toString()
Returns a string representation of this `Float16`.

Overrides:
  `toString` in class `Object`
Implementation Requirements:
  This method returns the result of `Float16.toString(this)`.
Returns:
  a string representation of this `Float16`

### shortValue

public short shortValue()
Returns the value of this `Float16` as a `short` after a narrowing primitive conversion.

Overrides:
  `shortValue` in class `Number`
Returns:
  the value of this `Float16` as a `short` after a narrowing primitive conversion
See Java Language Specification:
  5.1.3 Narrowing Primitive Conversion

### intValue

public int intValue()
Returns the value of this `Float16` as an `int` after a narrowing primitive conversion.

Specified by:
  `intValue` in class `Number`
API Note:
  This method corresponds to the convertToIntegerTowardZero operation defined in IEEE 754.
Returns:
  the value of this `Float16` as an `int` after a narrowing primitive conversion
See Java Language Specification:
  5.1.3 Narrowing Primitive Conversion

### longValue

public long longValue()
Returns value of this `Float16` as a `long` after a narrowing primitive conversion.

Specified by:
  `longValue` in class `Number`
API Note:
  This method corresponds to the convertToIntegerTowardZero operation defined in IEEE 754.
Returns:
  value of this `Float16` as a `long` after a narrowing primitive conversion
See Java Language Specification:
  5.1.3 Narrowing Primitive Conversion

### floatValue

public float floatValue()
Returns the value of this `Float16` as a `float` after a widening primitive conversion.

Specified by:
  `floatValue` in class `Number`
API Note:
  This method corresponds to the convertFormat operation defined in IEEE 754.
Returns:
  the value of this `Float16` as a `float` after a widening primitive conversion
See Java Language Specification:
  5.1.2 Widening Primitive Conversion

### doubleValue

public double doubleValue()
Returns the value of this `Float16` as a `double` after a widening primitive conversion.

Specified by:
  `doubleValue` in class `Number`
API Note:
  This method corresponds to the convertFormat operation defined in IEEE 754.
Returns:
  the value of this `Float16` as a `double` after a widening primitive conversion
See Java Language Specification:
  5.1.2 Widening Primitive Conversion

### hashCode

public int hashCode()
Returns a hash code for this `Float16` object. The general contract of `Object#hashCode()` is satisfied. All NaN values have the same hash code. Additionally, all distinct numerical values have unique hash codes; in particular, negative zero and positive zero have different hash codes from each other.

Overrides:
  `hashCode` in class `Object`
Returns:
  a hash code for this `Float16` object
See Also:
  - `Object.equals(java.lang.Object)`
  - `System.identityHashCode(Object)`

### hashCode

public static int hashCode(Float16 value)
Returns a hash code for a `Float16` value; compatible with `Float16.hashCode()`.

Parameters:
  `value` - the value to hash
Returns:
  a hash code value for a `Float16` value.

### equals

public boolean equals(Object obj)
Compares this object against the specified object. The result is `true` if and only if the argument is not `null` and is a `Float16` object that represents a `Float16` that has the same value as the `double` represented by this object.

Overrides:
  `equals` in class `Object`
Parameters:
  `obj` - the reference object with which to compare.
Returns:
  `true` if this object is the same as the obj argument; `false` otherwise.
See Java Language Specification:
  15.21.1 Numerical Equality Operators == and !=
See Also:
  - `Object.hashCode()`
  - `HashMap`

### float16ToRawShortBits

public static short float16ToRawShortBits(Float16 f16)
Returns a representation of the specified floating-point value according to the IEEE 754 floating-point binary16 bit layout.

Parameters:
  `f16` - a `Float16` floating-point number.
Returns:
  the bits that represent the floating-point number.
See Also:
  - `Float.floatToRawIntBits(float)`
  - `Double.doubleToRawLongBits(double)`

### float16ToShortBits

public static short float16ToShortBits(Float16 f16)
Returns a representation of the specified floating-point value according to the IEEE 754 floating-point binary16 bit layout. All NaN values return the same bit pattern as `NaN`.

Parameters:
  `f16` - a `Float16` floating-point number.
Returns:
  the bits that represent the floating-point number.
See Also:
  - `Float.floatToRawIntBits(float)`
  - `Double.doubleToRawLongBits(double)`

### shortBitsToFloat16

public static Float16 shortBitsToFloat16(short bits)
Returns the `Float16` value corresponding to a given bit representation.

Parameters:
  `bits` - any `short` integer.
Returns:
  the `Float16` floating-point value with the same bit pattern.
See Also:
  - `Float.intBitsToFloat(int)`
  - `Double.longBitsToDouble(long)`

### compareTo

public int compareTo(Float16 anotherFloat16)
Compares two `Float16` objects numerically. This method imposes a total order on `Float16` objects with two differences compared to the incomplete order defined by the Java language numerical comparison operators (`<, <=, ==, >=, >`) on `float` and `double` values.

- A NaN is unordered with respect to other values and unequal to itself under the comparison operators. This method chooses to define `Float16.NaN` to be equal to itself and greater than all other `Float16` values (including `Float16.POSITIVE_INFINITY`).
- Positive zero and negative zero compare equal numerically, but are distinct and distinguishable values. This method chooses to define positive zero to be greater than negative zero.

Specified by:
  `compareTo` in interface `Comparable<Float16>`
Parameters:
  `anotherFloat16` - the `Float16` to be compared.
Returns:
  the value `0` if `anotherFloat16` is numerically equal to this `Float16`; a value less than `0` if this `Float16` is numerically less than `anotherFloat16`; and a value greater than `0` if this `Float16` is numerically greater than `anotherFloat16`.
See Java Language Specification:
  15.20.1 Numerical Comparison Operators `<`, `<=`, `>`, and `>=`
See Also:
  - `Float.compareTo(Float)`
  - `Double.compareTo(Double)`

### compare

public static int compare(Float16 f1, Float16 f2)
Compares the two specified `Float16` values.

Parameters:
  `f1` - the first `Float16` to compare
  `f2` - the second `Float16` to compare
Returns:
  the value `0` if `f1` is numerically equal to `f2`; a value less than `0` if `f1` is numerically less than `f2`; and a value greater than `0` if `f1` is numerically greater than `f2`.
See Also:
  - `Float.compare(float, float)`
  - `Double.compare(double, double)`

### max

public static Float16 max(Float16 a, Float16 b)
Returns the larger of two `Float16` values. The handling of signed zeros, NaNs, infinities, and other special cases by this method is analogous to the handling of those cases by the Math#max(double, double) method.

API Note:
  This method corresponds to the maximum operation defined in IEEE 754.
Parameters:
  `a` - the first operand
  `b` - the second operand
Returns:
  the greater of `a` and `b`
See Also:
  - `BinaryOperator`
  - `Math.max(float, float)`

### min

public static Float16 min(Float16 a, Float16 b)
Returns the smaller of two `Float16` values. The handling of signed zeros, NaNs, infinities, and other special cases by this method is analogous to the handling of those cases by the Math#min(double, double) method.

API Note:
  This method corresponds to the minimum operation defined in IEEE 754.
Parameters:
  `a` - the first operand
  `b` - the second operand
Returns:
  the smaller of `a` and `b`
See Also:
  - `BinaryOperator`
  - `Math.min(float, float)`

### add

public static Float16 add(Float16 addend, Float16 augend)
Adds two `Float16` values together as per the `+` operator semantics using the round to nearest rounding policy. The handling of signed zeros, NaNs, infinities, and other special cases by this method is the same as for the handling of those cases by the built-in `+` operator for floating-point addition (JLS 15.18.2).

API Note:
  This method corresponds to the addition operation defined in IEEE 754.
Parameters:
  `addend` - the first operand
  `augend` - the second operand
Returns:
  the sum of the operands
See Java Language Specification:
  15.4 Floating-point Expressions
  15.18.2 Additive Operators (+ and -) for Numeric Types

### subtract

public static Float16 subtract(Float16 minuend, Float16 subtrahend)
Subtracts two `Float16` values as per the `-` operator semantics using the round to nearest rounding policy. The handling of signed zeros, NaNs, infinities, and other special cases by this method is the same as for the handling of those cases by the built-in `-` operator for floating-point subtraction (JLS 15.18.2).

API Note:
  This method corresponds to the subtraction operation defined in IEEE 754.
Parameters:
  `minuend` - the first operand
  `subtrahend` - the second operand
Returns:
  the difference of the operands
See Java Language Specification:
  15.4 Floating-point Expressions
  15.18.2 Additive Operators (+ and -) for Numeric Types

### multiply

public static Float16 multiply(Float16 multiplier, Float16 multiplicand)
Multiplies two `Float16` values as per the `*` operator semantics using the round to nearest rounding policy. The handling of signed zeros, NaNs, and infinities, other special cases by this method is the same as for the handling of those cases by the built-in `*` operator for floating-point multiplication (JLS 15.17.1).

API Note:
  This method corresponds to the multiplication operation defined in IEEE 754.
Parameters:
  `multiplier` - the first operand
  `multiplicand` - the second operand
Returns:
  the product of the operands
See Java Language Specification:
  15.4 Floating-point Expressions
  15.17.1 Multiplication Operator *

### divide

public static Float16 divide(Float16 dividend, Float16 divisor)
Divides two `Float16` values as per the `/` operator semantics using the round to nearest rounding policy. The handling of signed zeros, NaNs, and infinities, other special cases by this method is the same as for the handling of those cases by the built-in `/` operator for floating-point division (JLS 15.17.2).

API Note:
  This method corresponds to the division operation defined in IEEE 754.
Parameters:
  `dividend` - the first operand
  `divisor` - the second operand
Returns:
  the quotient of the operands
See Java Language Specification:
  15.4 Floating-point Expressions
  15.17.2 Division Operator /

### sqrt

public static Float16 sqrt(Float16 radicand)
Returns the square root of the operand. The square root is computed using the round to nearest rounding policy. The handling of zeros, NaN, infinities, and negative arguments by this method is analogous to the handling of those cases by `Math.sqrt(double)`.

API Note:
  This method corresponds to the squareRoot operation defined in IEEE 754.
Parameters:
  `radicand` - the argument to have its square root taken
Returns:
  the square root of the operand
See Also:
  - `Math.sqrt(double)`

### fma

public static Float16 fma(Float16 a, Float16 b, Float16 c)
Returns the fused multiply add of the three arguments; that is, returns the exact product of the first two arguments summed with the third argument and then rounded once to the nearest `Float16`. The handling of zeros, NaN, infinities, and other special cases by this method is analogous to the handling of those cases by `Math.fma(float, float, float)`.

API Note:
  This method corresponds to the fusedMultiplyAdd operation defined in IEEE 754.
Parameters:
  `a` - a value
  `b` - a value
  `c` - a value
Returns:
  (a × b + c) computed, as if with unlimited range and precision, and rounded once to the nearest `Float16` value
See Also:
  - `Math.fma(float, float, float)`
  - `Math.fma(double, double, double)`

### negate

public static Float16 negate(Float16 f16)
Returns the negation of the argument. Special cases:

- If the argument is zero, the result is a zero with the opposite sign as the argument.
- If the argument is infinite, the result is an infinity with the opposite sign as the argument.
- If the argument is a NaN, the result is a NaN.

API Note:
  This method corresponds to the negate operation defined in IEEE 754.
Parameters:
  `f16` - the value to be negated
Returns:
  the negation of the argument
See Java Language Specification:
  15.15.4 Unary Minus Operator `-`

### abs

public static Float16 abs(Float16 f16)
Returns the absolute value of the argument. The handling of zeros, NaN, and infinities by this method is analogous to the handling of those cases by `Math.abs(float)`.

Parameters:
  `f16` - the argument whose absolute value is to be determined
Returns:
  the absolute value of the argument
See Also:
  - `Math.abs(float)`
  - `Math.abs(double)`

### getExponent

public static int getExponent(Float16 f16)
Returns the unbiased exponent used in the representation of a `Float16`.

- If the argument is NaN or infinite, then the result is `MAX_EXPONENT` + 1.
- If the argument is zero or subnormal, then the result is `MIN_EXPONENT` - 1.

API Note:
  This method is analogous to the logB operation defined in IEEE 754, but returns a different value on subnormal arguments.
Parameters:
  `f16` - a `Float16` value
Returns:
  the unbiased exponent of the argument
See Also:
  - `Math.getExponent(float)`
  - `Math.getExponent(double)`

### ulp

public static Float16 ulp(Float16 f16)
Returns the size of an ulp of the argument. An ulp, unit in the last place, of a `Float16` value is the positive distance between this floating-point value and the `Float16` value next larger in magnitude. Note that for non-NaN x, `ulp(-x) == ulp(x)`.

Special Cases:

- If the argument is NaN, then the result is NaN.
- If the argument is positive or negative infinity, then the result is positive infinity.
- If the argument is positive or negative zero, then the result is `Float16.MIN_VALUE`.
- If the argument is ±`Float16.MAX_VALUE`, then the result is equal to 25, 32.0.

Parameters:
  `f16` - the floating-point value whose ulp is to be returned
Returns:
  the size of an ulp of the argument
See Also:
  - `Math.ulp(float)`
  - `Math.ulp(double)`

### nextUp

public static Float16 nextUp(Float16 v)
Returns the floating-point value adjacent to `v` in the direction of positive infinity.

Special Cases:

- If the argument is NaN, the result is NaN.
- If the argument is positive infinity, the result is positive infinity.
- If the argument is zero, the result is `MIN_VALUE`

API Note:
  This method corresponds to the nextUp operation defined in IEEE 754.
Parameters:
  `v` - starting floating-point value
Returns:
  The adjacent floating-point value closer to positive infinity.
See Also:
  - `Math.nextUp(float)`
  - `Math.nextUp(double)`

### nextDown

public static Float16 nextDown(Float16 v)
Returns the floating-point value adjacent to `v` in the direction of negative infinity.

Special Cases:

- If the argument is NaN, the result is NaN.
- If the argument is negative infinity, the result is negative infinity.
- If the argument is zero, the result is -`MIN_VALUE`

API Note:
  This method corresponds to the nextDown operation defined in IEEE 754.
Parameters:
  `v` - starting floating-point value
Returns:
  The adjacent floating-point value closer to negative infinity.
See Also:
  - `Math.nextDown(float)`
  - `Math.nextDown(double)`

### scalb

public static Float16 scalb(Float16 v, int scaleFactor)
Returns `v` × 2`scaleFactor` rounded as if performed by a single correctly rounded floating-point multiply. If the exponent of the result is between `MIN_EXPONENT` and `MAX_EXPONENT`, the answer is calculated exactly. If the exponent of the result would be larger than `Float16.MAX_EXPONENT`, an infinity is returned. Note that if the result is subnormal, precision may be lost; that is, when `scalb(x, n)` is subnormal, `scalb(scalb(x, n), -n)` may not equal x. When the result is non-NaN, the result has the same sign as `v`.

Special cases:

- If the first argument is NaN, NaN is returned.
- If the first argument is infinite, then an infinity of the same sign is returned.
- If the first argument is zero, then a zero of the same sign is returned.

API Note:
  This method corresponds to the scaleB operation defined in IEEE 754.
Parameters:
  `v` - number to be scaled by a power of two.
  `scaleFactor` - power of 2 used to scale `v`
Returns:
  `v` × 2`scaleFactor`
See Also:
  - `Math.scalb(float, int)`
  - `Math.scalb(double, int)`

### copySign

public static Float16 copySign(Float16 magnitude, Float16 sign)
Returns the first floating-point argument with the sign of the second floating-point argument. This method does not require NaN `sign` arguments to be treated as positive values; implementations are permitted to treat some NaN arguments as positive and other NaN arguments as negative to allow greater performance.

API Note:
  This method corresponds to the copySign operation defined in IEEE 754.
Parameters:
  `magnitude` - the parameter providing the magnitude of the result
  `sign` - the parameter providing the sign of the result
Returns:
  a value with the magnitude of `magnitude` and the sign of `sign`.
See Also:
  - `Math.copySign(float, float)`
  - `Math.copySign(double, double)`

### signum

public static Float16 signum(Float16 f)
Returns the signum function of the argument; zero if the argument is zero, 1.0 if the argument is greater than zero, -1.0 if the argument is less than zero.

Special Cases:

- If the argument is NaN, then the result is NaN.
- If the argument is positive zero or negative zero, then the result is the same as the argument.

Parameters:
  `f` - the floating-point value whose signum is to be returned
Returns:
  the signum function of the argument
See Also:
  - `Math.signum(float)`
  - `Math.signum(double)`