* mpi/ec.c (ec_get_a_is_pminus3): Change the calculation
so that it keeps the MPI of A untouched.
--
Note that mpi_cmp with A may normalize the MPI.
Signed-off-by: NIIBE Yutaka <gni...@fsij.org>
---
mpi/ec.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/mpi/ec.c b/mpi/ec.c
index d1f376ca..3cfe11c6 100644
--- a/mpi/ec.c
+++ b/mpi/ec.c
@@ -728,8 +728,8 @@ ec_get_a_is_pminus3 (mpi_ec_t ec)
{
ec->t.valid.a_is_pminus3 = 1;
tmp = mpi_alloc_like (ec->p);
- mpi_sub_ui (tmp, ec->p, 3);
- ec->t.a_is_pminus3 = !mpi_cmp (ec->a, tmp);
+ mpi_sub (tmp, ec->p, ec->a);
+ ec->t.a_is_pminus3 = !mpi_cmp_ui (tmp, 3);
mpi_free (tmp);
}
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