[gambit-list] Straight dope on FIXADDP, FIXMULP, ...
Bradley Lucier
lucier at math.purdue.edu
Sat May 7 01:05:44 EDT 2005
Marc:
There is a wonderful little book "Hacker's Delight" by Henry S. Warren
Jr. (with a foreword by Guy Steele, BTW), that has a special section on
"Overflow Detection" in Chapter 1, "Basics". The section begins on
page 26. In this section you'll find all the tests for overflow of
signed addition, subtraction, and multiplication that you need in ##+,
##-, and ##* and FIXADDP, FIXSUBP, and FIXMULP (which should all
probably be merged (##+ with FIXADDP, etc., of course) in some way).
Would you like me to look at some of the implementation details?
Brad
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