Tiny but useful optimization in bigint_monty_redc

Increases perf of larger DH by 5-8%

1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib/math/mp/mp_monty.cpp b/src/lib/math/mp/mp_monty.cpp
index b2b3b5e4e..e2f93a9a7 100644
--- a/src/lib/math/mp/mp_monty.cpp
+++ b/src/lib/math/mp/mp_monty.cpp
@@ -60,7 +60,7 @@ void bigint_monty_redc(word z[],
       for(size_t j = p_size + 1; j < z_size - i; ++j)
          {
          z_i[j] += carry;
-         carry = carry & !z_i[j];
+         carry = (z_i[j] < carry);
          }
       }