Triple Precision Arithmetic Package for the PDP-5/8
5,8-21

Joseph A. Rodnite, Information Control Systems, Ann Arbor,
Michigan

An arithmetic package to operate on 36-bit signed integers.
The operations are add, subtract , multiply, divide, input
conversion, and output conversion. The largest integer
which may be represented is 235-l or 10 decimal digits.
The routines simulate a 36-bit (3 word) accumulator in core
locations 40, 41, and 42 and a 36-bit multiplier quotient
register in core locations 43, 44, and 45. Aside from the few
locations in page 0, the routines use less core storage space
than the equivalent double precision routines.

Catalog: November 1969