Description of problem:

When trying to build java-1.6.0-openjdk on ia64, we got below error: 

java.lang.IllegalArgumentException: disparate values
        at sun.misc.FDBigInt.quoRemIteration(FloatingDecimal.java:2795)
        at sun.misc.FloatingDecimal.dtoa(FloatingDecimal.java:833)
        at sun.misc.FloatingDecimal.<init>(FloatingDecimal.java:460)
Full log: 
http://ia64.koji.fedoraproject.org/koji/getfile?taskID=51511&name=build.log 

I looked into this issue and found that Math.floor() is used in
FloatingDecimal.dtoa() to calculate decExp. And Math.floor() always returns 0
here, no matter what argument passed to it. 

The implemention of the floor function is in
openjdk/jdk/src/share/native/java/lang/fdlibm/src/s_floor.c and the cause of the
malfuntion is that the definition _LITTLE_ENDIAN is missing when including
openjdk/jdk/src/share/native/java/lang/fdlibm/include/fdlibm.h. So the big
endian macros such as __HI(x) was used instead of the little endian ones. 

Adding the definition of _LITTLE_ENDIAN in fdlibm.h for ia64 could fix the
issue. A successful test build with this fix is at
http://ia64.koji.fedoraproject.org/koji/taskinfo?taskID=60392. 

Version-Release number of selected component (if applicable):
java-1.6.0-openjdk-1.6.0.0-0.0.8.b08.fc9

How reproducible:
always

Steps to Reproduce:

The issue could be reproduced by rebuilding the srpm on ia64 or
1. make icedtea-against-ecj
2. used the just built javac to compile any .java file containing 
   public static final double MAX_VALUE = 0x1.fffffffffffffP+1023;
3.
  
Actual results:

# Running javac:
/builddir/build/BUILD/icedtea6-1.1/bootstrap/jdk1.6.0/bin/java -Xmx896m -Xms896m
-XX:-Inline -Xbootclasspath/p:/builddir/build/BUILD/ice\
dtea6-1.1/openjdk/control/build/linux-ia64/langtools/dist/bootstrap/lib/javac.jar
-jar /builddir/build/BUILD/icedtea6-1.1/openjdk/contro\
l/build/linux-ia64/langtools/dist/bootstrap/lib/javac.jar -g -source 1.5 -target
5 -encoding ascii -Xbootclasspath:/builddir/build/BUILD\
/icedtea6-1.1/openjdk/control/build/linux-ia64/classes -sourcepath
/builddir/build/BUILD/icedtea6-1.1/openjdk/control/build/linux-ia64/g\
ensrc:../../../src/solaris/classes:../../../src/share/classes -d
/builddir/build/BUILD/icedtea6-1.1/openjdk/control/build/linux-ia64/cla\
sses
@/builddir/build/BUILD/icedtea6-1.1/openjdk/control/build/linux-ia64/tmp/java/java.lang/java/.classes.list
An exception has occurred in the compiler (1.6.0-internal_bootstrap). Please
file a bug at the Java Developer Connection (http://java.su\
n.com/webapps/bugreport)  after checking the Bug Parade for duplicates. Include
your program and the following diagnostic in your report\
.  Thank you.
java.lang.IllegalArgumentException: disparate values
        at sun.misc.FDBigInt.quoRemIteration(FloatingDecimal.java:2795)
        at sun.misc.FloatingDecimal.dtoa(FloatingDecimal.java:833)
        at sun.misc.FloatingDecimal.<init>(FloatingDecimal.java:460)
        at sun.misc.FloatingDecimal.parseHexString(FloatingDecimal.java:2297)
        at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1064)
        at java.lang.Float.valueOf(Float.java:405)

Expected results:


Additional info: