Dag-Erling Smørgrav
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a33f58cad7
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Fix equality predicate.
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2015-01-07 19:23:38 +00:00 |
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Dag-Erling Smørgrav
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d0fb2359f1
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Implement mpi_{add,sub}() in terms of mpi_{add,sub}_abs().
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2015-01-07 18:59:44 +00:00 |
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Dag-Erling Smørgrav
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7a90ca7b42
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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.
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2014-12-30 19:14:59 +00:00 |
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Dag-Erling Smørgrav
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0d483f20ab
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Fix msb calculation. We may have to backtrack quite a bit, for
instance when subtracting two nearly equal large numbers.
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2014-12-30 16:45:18 +00:00 |
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Dag-Erling Smørgrav
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1c024928f9
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Fix off-by-one bug in mpi_cmp() which could cause it to read past the
end of the buffer.
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2014-12-30 16:35:13 +00:00 |
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Dag-Erling Smørgrav
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43b870dc83
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WIP: implement subtraction correctly. The actual result is now correct
most of the time, but the MSB calculation is not.
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2014-12-30 11:23:30 +00:00 |
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Dag-Erling Smørgrav
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7524a14386
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comment nit
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2014-12-30 11:15:28 +00:00 |
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Dag-Erling Smørgrav
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c5b962387c
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Add mpi_eq_abs() and mpi_eq() predicates.
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2014-12-30 11:12:11 +00:00 |
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Dag-Erling Smørgrav
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bc8e9d67ba
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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.
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2014-12-29 23:44:34 +00:00 |
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Dag-Erling Smørgrav
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98c6349d4a
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In mpi_zero(), save a memset() if the target is already zero.
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2014-12-29 23:22:54 +00:00 |
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Dag-Erling Smørgrav
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1412dac680
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Shifting any number by zero places is a no-op, but so is shifting zero by
any number of places.
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2014-12-29 23:20:26 +00:00 |
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Dag-Erling Smørgrav
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8228f19d5a
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In mpi_copy(), any failure should leave the target untouched.
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2014-12-29 23:18:57 +00:00 |
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Dag-Erling Smørgrav
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82f5c5cf77
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In mpi_load(), use be32dec() when possible.
In mpi_set(), it is impossible for the value being loaded to exceed
the minimum size of an mpi; thus, there is no need for mpi_grow().
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2014-12-29 15:08:09 +00:00 |
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Dag-Erling Smørgrav
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d4fd9a1958
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rm unused variable
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2014-08-12 07:33:30 +00:00 |
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Dag-Erling Smørgrav
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be31515f5e
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Start of a multiple-precision integer arithmetic library.
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2014-08-12 07:30:31 +00:00 |
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