From edd2883e599ccf62ce46772b036a3704738e5f6a Mon Sep 17 00:00:00 2001
From: Mike Hamburg <mike@shiftleft.org>
Date: Wed, 4 Mar 2015 15:29:52 -0800
Subject: [PATCH] condswap is the main remaining bottleneck on monty ladder. 
 comment in a pragma but dont actually use it yet...

---
 src/decaf_fast.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/decaf_fast.c b/src/decaf_fast.c
index 886dae7..a0772c8 100644
--- a/src/decaf_fast.c
+++ b/src/decaf_fast.c
@@ -181,12 +181,15 @@ sv cond_neg(gf x, decaf_bool_t neg) {
 }
 
 /** Constant time, if (swap) (x,y) = (y,x); */
-sv cond_swap(gf x, gf y, decaf_bool_t swap) {
-    FOR_LIMB(i, {
+static inline void cond_swap(gf x, gf y, decaf_bool_t swap) {
+    int i;
+    /* PERF */
+    //_Pragma("clang loop unroll(disable) vectorize(enable) vectorize_width(4) interleave_count(2)")
+    for (i=0; i<DECAF_448_LIMBS; i++) {
         decaf_word_t s = (x[i] ^ y[i]) & swap;
         x[i] ^= s;
         y[i] ^= s;
-    });
+    }
 }
 
 /**