Commit graph

7 commits

Author SHA1 Message Date
Dag-Erling Smørgrav
68f20a9213 Big reorganization and cleanup 2016-09-04 14:56:39 +02:00
Dag-Erling Smørgrav
d0fb2359f1 Implement mpi_{add,sub}() in terms of mpi_{add,sub}_abs(). 2015-01-07 18:59:44 +00:00
Dag-Erling Smørgrav
7a90ca7b42 Since X may point to the same MPI as either G or L (or even both), we
can't set the carry flag based on the contents of G or L after having
modified X.  Instead, compute and stash the new carry value first.
2014-12-30 19:14:59 +00:00
Dag-Erling Smørgrav
0d483f20ab Fix msb calculation. We may have to backtrack quite a bit, for
instance when subtracting two nearly equal large numbers.
2014-12-30 16:45:18 +00:00
Dag-Erling Smørgrav
43b870dc83 WIP: implement subtraction correctly. The actual result is now correct
most of the time, but the MSB calculation is not.
2014-12-30 11:23:30 +00:00
Dag-Erling Smørgrav
bc8e9d67ba In both mpi_add_abs() and mpi_sub_abs(), make sure that the target is
untouched if the operation fails.  Also ensure that A = A +/- A works.
2014-12-29 23:44:34 +00:00
Dag-Erling Smørgrav
be31515f5e Start of a multiple-precision integer arithmetic library. 2014-08-12 07:30:31 +00:00