The instructions for getting test vectors suggest running
timesoftfloat. However, that program was designed not to test the
accuracy of the results, just to test how long it takes softfloat to
do the arithmetic. For 32 bit operations it has a list of 32
different numbers. It applies the operation for all pairs of the
32X32 numbers -- you can ask for 100000 vectors, but you get 100
copies of the same 1024 argument values.

In addition, there are no vectors testing square root.

(This is after modifying the given timesoftfloat.c to even print the
values. As downloaded it didn't print anything but the time to do the
operations.)