Add a comment about storing the carry flag - libzahl - big integer library
HTML git clone git://git.suckless.org/libzahl
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---
DIR commit 6b97020bdbdc5eb08aaa638d0649013ce9c65188
DIR parent 26515c8f58f30e9ec99e16e3054913ff89ae742b
HTML Author: Mattias Andrée <maandree@kth.se>
Date: Fri, 10 Jun 2016 13:35:41 +0200
Add a comment about storing the carry flag
Signed-off-by: Mattias Andrée <maandree@kth.se>
Diffstat:
M src/zadd.c | 5 +++++
1 file changed, 5 insertions(+), 0 deletions(-)
---
DIR diff --git 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 { \