ibeta = 2
it = 24
irnd = 5
ngrd = 0
machep = -23
negep = -24
iexp = 8
minexp = -126
maxexp = 128
eps =  1.19209e-07
epsneg =  5.96046e-08
xmin =  1.17549e-38
xmax =  3.40282e+38