LongPolynomial2 (Bouncy Castle Library 1.68 API Specification)

java.lang.Object
- org.bouncycastle.pqc.math.ntru.polynomial.LongPolynomial2

```
public class LongPolynomial2
extends java.lang.Object
```
A polynomial class that combines two coefficients into one long value for faster multiplication in 64 bit environments.
Coefficients can be between 0 and 2047 and are stored in pairs in the bits 0..10 and 24..34 of a long number.

Constructor Summary

Constructors
Constructor Description

LongPolynomial2(IntegerPolynomial p)
Constructs a LongPolynomial2 from a IntegerPolynomial.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.Object`	`clone()`
`boolean`	`equals(java.lang.Object obj)`
`LongPolynomial2`	`mult(LongPolynomial2 poly2)`	Multiplies the polynomial with another, taking the indices mod N and the values mod 2048.
`void`	`mult2And(int mask)`	Multiplies this polynomial by 2 and applies an AND mask to the upper and lower halves of each coefficients.
`void`	`subAnd(LongPolynomial2 b, int mask)`	Subtracts another polynomial which must have the same number of coefficients, and applies an AND mask to the upper and lower halves of each coefficients.
`IntegerPolynomial`	`toIntegerPolynomial()`

Methods inherited from class java.lang.Object
finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - LongPolynomial2
```
public LongPolynomial2(IntegerPolynomial p)
```
    Constructs a LongPolynomial2 from a IntegerPolynomial. The two polynomials are independent of each other.
    
    Parameters:
    
    p - the original polynomial. Coefficients must be between 0 and 2047.
- Method Detail
  - mult
```
public LongPolynomial2 mult(LongPolynomial2 poly2)
```
    Multiplies the polynomial with another, taking the indices mod N and the values mod 2048.
  - toIntegerPolynomial
```
public IntegerPolynomial toIntegerPolynomial()
```
  - subAnd
```
public void subAnd(LongPolynomial2 b,
                   int mask)
```
    Subtracts another polynomial which must have the same number of coefficients, and applies an AND mask to the upper and lower halves of each coefficients.
    
    Parameters:
    
    b - another polynomial
    
    mask - a bit mask less than 2048 to apply to each 11-bit coefficient
  - mult2And
```
public void mult2And(int mask)
```
    Multiplies this polynomial by 2 and applies an AND mask to the upper and lower halves of each coefficients.
    
    Parameters:
    
    mask - a bit mask less than 2048 to apply to each 11-bit coefficient
  - clone
```
public java.lang.Object clone()
```
    Overrides:
    
    clone in class java.lang.Object
  - equals
```
public boolean equals(java.lang.Object obj)
```
    Overrides:
    
    equals in class java.lang.Object