From aab80b7b5169295ab9f005f8102ce64d3f81839a Mon Sep 17 00:00:00 2001
From: Michael Hamburg <mike@shiftleft.org>
Date: Tue, 3 Mar 2015 16:06:04 -0800
Subject: [PATCH] faster code can now use non-reduced field ops

---
 src/decaf_fast.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/decaf_fast.c b/src/decaf_fast.c
index 1c4a26c..a120d4f 100644
--- a/src/decaf_fast.c
+++ b/src/decaf_fast.c
@@ -538,7 +538,7 @@ void decaf_448_point_double(decaf_448_point_t p, const decaf_448_point_t q) {
     gf_add_nr ( d, c, a );
     gf_add_nr ( p->t, q->y, q->x );
     gf_sqr ( b, p->t );
-    gf_sub_nr_x ( b, b, d, 4 );
+    gf_sub_nr_x ( b, b, d, 3 );
     gf_sub_nr ( p->t, a, c );
     gf_sqr ( p->x, q->z );
     gf_add_nr ( p->z, p->x, p->x );