Package org.apfloat.internal
Class DoubleCRTMath
java.lang.Object
org.apfloat.internal.DoubleBaseMath
org.apfloat.internal.DoubleCRTMath
- All Implemented Interfaces:
Serializable
- Direct Known Subclasses:
DoubleCarryCRTStepStrategy
Basic arithmetic for calculating the Chinese Remainder
Theorem. Works for the
double
type.- Version:
- 1.6
- Author:
- Mikko Tommila
- See Also:
- Serialized Form
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Constructor Summary
ConstructorsConstructorDescriptionDoubleCRTMath(int radix)
Creates a carry-CRT math using the specified radix. -
Method Summary
Modifier and TypeMethodDescriptiondouble
add(double[] src, double[] srcDst)
Adds three words.double
compare(double[] src1, double[] src2)
Compares three words.double
divide(double[] srcDst)
Divides three words by the base to produce two words.void
multiply(double[] src, double factor, double[] dst)
Multiplies two words by one word to produce a result of three words.void
subtract(double[] src, double[] srcDst)
Subtracts three words.Methods inherited from class org.apfloat.internal.DoubleBaseMath
baseAdd, baseDivide, baseMultiplyAdd, baseSubtract
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Constructor Details
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DoubleCRTMath
public DoubleCRTMath(int radix)Creates a carry-CRT math using the specified radix.- Parameters:
radix
- The radix that will be used.
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Method Details
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multiply
public final void multiply(double[] src, double factor, double[] dst)Multiplies two words by one word to produce a result of three words. Most significant word is stored first.- Parameters:
src
- Source array, first multiplicand.factor
- Second multiplicand.dst
- Destination array.
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compare
public final double compare(double[] src1, double[] src2)Compares three words. Most significant word is stored first.- Parameters:
src1
- First operand.src2
- Second operand.- Returns:
- Less than zero if
src1 < src2
, greater than zero ifsrc1 > src2
and zero ifsrc1 == src2
.
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add
public final double add(double[] src, double[] srcDst)Adds three words. Most significant word is stored first.- Parameters:
src
- First operand.srcDst
- Second operand, and destination of the operation.- Returns:
- Overflow carry bit.
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subtract
public final void subtract(double[] src, double[] srcDst)Subtracts three words. Most significant word is stored first.- Parameters:
src
- First operand.srcDst
- Second operand, and destination of the operation.
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divide
public final double divide(double[] srcDst)Divides three words by the base to produce two words. Most significant word is stored first.- Parameters:
srcDst
- Source and destination of the operation.- Returns:
- Remainder of the division.
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