From 6b97020bdbdc5eb08aaa638d0649013ce9c65188 Mon Sep 17 00:00:00 2001
From: Mattias Andrée <maandree@kth.se>
Date: Fri, 10 Jun 2016 13:35:41 +0200
Subject: Add a comment about storing the carry flag
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Signed-off-by: Mattias Andrée <maandree@kth.se>
---
 src/zadd.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/zadd.c b/src/zadd.c
index 56c901b..179a159 100644
--- a/src/zadd.c
+++ b/src/zadd.c
@@ -25,6 +25,11 @@
 	"\n    jc 1f"           \
 	"\n    movq $0, %[x]"   \
 	"\n 1:"
+/*
+ * I have already tried setc, cmovnc, cmovc, and adc,
+ * instead of the last four lines. There does not seem
+ * to be any better why to store the carry flag.
+ */
 
 # define ASM_ADD(N)                                                                          \
 	do {                                                                                 \
-- 
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