net.sourceforge.interval.ia_math
Class RMath

java.lang.Object
  |
  +--net.sourceforge.interval.ia_math.RMath

public class RMath

extends java.lang.Object

RMath.java -- classes implementing directed rounding of real numbers, as part of the "ia_math library" version 0.1beta1, 10/97

Copyright (C) 2000 Timothy J. Hickey

License: zlib/png

the class RoundedMath contains methods and constants for controling the rounding of the elementary arithmetic operations on floating point numbers.

The current Java 1.1 API does not contain any methods for performing rounded arithmetic besides the default (round toward nearest).

This version strikes a compromise between efficiency and accuracy.

Constructor Summary

RMath()

Method Summary

static double	acos_hi(double x)
static double	acos_lo(double x)
static double	add_hi(double x, double y)
static double	add_lo(double x, double y)
static double	asin_hi(double x)
static double	asin_lo(double x)
static double	atan_hi(double x)
static double	atan_lo(double x)
static double	cos_hi(double x)
static double	cos_lo(double x)
static double	div_hi(double x, double y)
static double	div_lo(double x, double y)
static double	exp_hi(double x)
static double	exp_lo(double x)
static double	log_hi(double x)
static double	log_lo(double x)
static void	main(java.lang.String[] argv)
static double	mul_hi(double x, double y)
static double	mul_lo(double x, double y)
static double	nextfp(double x) return the next larger double precision number
static double	pow_hi(double x, double y) returns upper bound on x**y assuming x>0
static double	pow_lo(double x, double y) returns lower bound on x**y assuming x>0
static double	prevfp(double x)
static double	sin_hi(double x)
static double	sin_lo(double x)
static double	sub_hi(double x, double y)
static double	sub_lo(double x, double y)
static double	tan_hi(double x)
static double	tan_lo(double x)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RMath

public RMath()

Method Detail

nextfp

public static double nextfp(double x)

return the next larger double precision number

prevfp

public static double prevfp(double x)

add_lo

public static double add_lo(double x,
                            double y)

add_hi

public static double add_hi(double x,
                            double y)

sub_lo

public static double sub_lo(double x,
                            double y)

sub_hi

public static double sub_hi(double x,
                            double y)

mul_lo

public static double mul_lo(double x,
                            double y)

mul_hi

public static double mul_hi(double x,
                            double y)

div_lo

public static double div_lo(double x,
                            double y)

div_hi

public static double div_hi(double x,
                            double y)

exp_lo

public static double exp_lo(double x)

exp_hi

public static double exp_hi(double x)

log_lo

public static double log_lo(double x)

log_hi

public static double log_hi(double x)

sin_lo

public static double sin_lo(double x)

sin_hi

public static double sin_hi(double x)

cos_lo

public static double cos_lo(double x)

cos_hi

public static double cos_hi(double x)

tan_lo

public static double tan_lo(double x)

tan_hi

public static double tan_hi(double x)

asin_lo

public static double asin_lo(double x)

asin_hi

public static double asin_hi(double x)

acos_lo

public static double acos_lo(double x)

acos_hi

public static double acos_hi(double x)

atan_lo

public static double atan_lo(double x)

atan_hi

public static double atan_hi(double x)

pow_lo

public static double pow_lo(double x,
                            double y)

returns lower bound on x**y assuming x>0

pow_hi

public static double pow_hi(double x,
                            double y)

returns upper bound on x**y assuming x>0

main

public static void main(java.lang.String[] argv)