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MPILIB: Fix comparison of negative MPIs

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If u and v both represent negative integers and their limb counts
happen to differ, mpi_cmp will always return a positive value - this
is obviously bogus. u is smaller than v if and only if it is larger in
absolute value.

Signed-off-by: Rasmus Villemoes <[email protected]>
Signed-off-by: David Howells <[email protected]>
Acked-by: Dmitry Kasatkin <[email protected]>
This commit is contained in:
Rasmus Villemoes 2015-01-14 16:10:12 +00:00 • committed by David Howells
commit b9f918a31d
1 changed files with 1 additions and 1 deletions
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2
lib/mpi/mpi-cmp.c
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@ -57,7 +57,7 @@ int mpi_cmp(MPI u, MPI v)
if (usize != vsize && !u->sign && !v->sign)
return usize - vsize;
if (usize != vsize && u->sign && v->sign)
return vsize + usize;
return vsize - usize;
if (!usize)
return 0;
cmp = mpihelp_cmp(u->d, v->d, usize);