Well it looks like that on the face of it, bit the actual process is a little more complicated.
You need to look for possible error during conversion.
This is a good site to convert and see bit pattern made by various numbers in 32 & 64bit floating point :
32bit to 64 bit : http://babbage.cs.qc.edu/IEEE-754/32bit.html
64bit to 32 bit : http://babbage.cs.qc.edu/IEEE-754/64bit.html
Thankfully enough, I did not have to struggle with the conversion. The Siemens Library suggested to me by Umencho was good enough for my requirement.
There is no such thing as the last bug in a program
There are no stubborn bugs, There are only stubborn Debuggers.