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Imported GNU Classpath 0.90

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Imported GNU Classpath 0.90
       * scripts/makemake.tcl: LocaleData.java moved to gnu/java/locale.

       * sources.am: Regenerated.
       * gcj/javaprims.h: Regenerated.
       * Makefile.in: Regenerated.
       * gcj/Makefile.in: Regenerated.
       * include/Makefile.in: Regenerated.
       * testsuite/Makefile.in: Regenerated.

       * gnu/java/lang/VMInstrumentationImpl.java: New override.
       * gnu/java/net/local/LocalSocketImpl.java: Likewise.
       * gnu/classpath/jdwp/VMMethod.java: Likewise.
       * gnu/classpath/jdwp/VMVirtualMachine.java: Update to latest
       interface.
       * java/lang/Thread.java: Add UncaughtExceptionHandler.
       * java/lang/reflect/Method.java: Implements GenericDeclaration and
       isSynthetic(),
       * java/lang/reflect/Field.java: Likewise.
       * java/lang/reflect/Constructor.java
       * java/lang/Class.java: Implements Type, GenericDeclaration,
       getSimpleName() and getEnclosing*() methods.
       * java/lang/Class.h: Add new public methods.
       * java/lang/Math.java: Add signum(), ulp() and log10().
       * java/lang/natMath.cc (log10): New function.
       * java/security/VMSecureRandom.java: New override.
       * java/util/logging/Logger.java: Updated to latest classpath
       version.
       * java/util/logging/LogManager.java: New override.

From-SVN: r113887
This commit is contained in:
Mark Wielaard 2006-05-18 17:29:21 +00:00
parent eaec4980e1
commit 4f9533c772
1640 changed files with 126485 additions and 104808 deletions
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101
libjava/classpath/java/lang/Math.java
View file

@ -948,4 +948,105 @@ public final class Math
return VMMath.tanh(a);
}
/**
* Return the ulp for the given double argument. The ulp is the
* difference between the argument and the next larger double. Note
* that the sign of the double argument is ignored, that is,
* ulp(x) == ulp(-x). If the argument is a NaN, then NaN is returned.
* If the argument is an infinity, then +Inf is returned. If the
* argument is zero (either positive or negative), then
* {@link Double#MIN_VALUE} is returned.
* @param d the double whose ulp should be returned
* @return the difference between the argument and the next larger double
* @since 1.5
*/
public static double ulp(double d)
{
if (Double.isNaN(d))
return d;
if (Double.isInfinite(d))
return Double.POSITIVE_INFINITY;
// This handles both +0.0 and -0.0.
if (d == 0.0)
return Double.MIN_VALUE;
long bits = Double.doubleToLongBits(d);
final int mantissaBits = 52;
final int exponentBits = 11;
final long mantMask = (1L << mantissaBits) - 1;
long mantissa = bits & mantMask;
final long expMask = (1L << exponentBits) - 1;
long exponent = (bits >>> mantissaBits) & expMask;
// Denormal number, so the answer is easy.
if (exponent == 0)
{
long result = (exponent << mantissaBits) | 1L;
return Double.longBitsToDouble(result);
}
// Conceptually we want to have '1' as the mantissa. Then we would
// shift the mantissa over to make a normal number. If this underflows
// the exponent, we will make a denormal result.
long newExponent = exponent - mantissaBits;
long newMantissa;
if (newExponent > 0)
newMantissa = 0;
else
{
newMantissa = 1L << -(newExponent - 1);
newExponent = 0;
}
return Double.longBitsToDouble((newExponent << mantissaBits) | newMantissa);
}
/**
* Return the ulp for the given float argument. The ulp is the
* difference between the argument and the next larger float. Note
* that the sign of the float argument is ignored, that is,
* ulp(x) == ulp(-x). If the argument is a NaN, then NaN is returned.
* If the argument is an infinity, then +Inf is returned. If the
* argument is zero (either positive or negative), then
* {@link Float#MIN_VALUE} is returned.
* @param f the float whose ulp should be returned
* @return the difference between the argument and the next larger float
* @since 1.5
*/
public static float ulp(float f)
{
if (Float.isNaN(f))
return f;
if (Float.isInfinite(f))
return Float.POSITIVE_INFINITY;
// This handles both +0.0 and -0.0.
if (f == 0.0)
return Float.MIN_VALUE;
int bits = Float.floatToIntBits(f);
final int mantissaBits = 23;
final int exponentBits = 8;
final int mantMask = (1 << mantissaBits) - 1;
int mantissa = bits & mantMask;
final int expMask = (1 << exponentBits) - 1;
int exponent = (bits >>> mantissaBits) & expMask;
// Denormal number, so the answer is easy.
if (exponent == 0)
{
int result = (exponent << mantissaBits) | 1;
return Float.intBitsToFloat(result);
}
// Conceptually we want to have '1' as the mantissa. Then we would
// shift the mantissa over to make a normal number. If this underflows
// the exponent, we will make a denormal result.
int newExponent = exponent - mantissaBits;
int newMantissa;
if (newExponent > 0)
newMantissa = 0;
else
{
newMantissa = 1 << -(newExponent - 1);
newExponent = 0;
}
return Float.intBitsToFloat((newExponent << mantissaBits) | newMantissa);
}
}