dexp - computes an integer power of 2 and returns the result as double
integer dexp -> double
-5 dexp frexp -> 0.5 -4
This is an interface to the C++ expression
double std::ldexp(1.0,int)
Stroustrup 3rd ed p 661
Diesmann
17.5.2005
/usr/src/packages/BUILD/sli/slimath.cc