# keep the overflow!
# |           hi (t2)     |       |           lo (t1)       |
# |_________________|       |__________________|
#      18 - O  | 14 - I         4-I| 14 - P | 13 - E
#              -----------------------------   <-- this is what we want to keep
# We've kept I and P, but since we're shifting right 13 bits, we need to get those bits out of hi
# |           hi (t2)     |       |           lo (t1)       |
# |_________________|       |____________ ______|
#  14 - Z |  18 - O               18 - I  | 14 - P
#            ---------------------------   <-- this is what we want to keep
# Z - zeros
# O - overflow
# I - integer
# P - original precision
# E - extra precision