X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/58a0fa747eab16c1997da619c2994a9cda640b00..refs/heads/graphwork:/armsrc/crypto1.c

diff --git a/armsrc/crypto1.c b/armsrc/crypto1.c
index 9d103c7f..3d56fab4 100644
--- a/armsrc/crypto1.c
+++ b/armsrc/crypto1.c
@@ -52,6 +52,7 @@ uint8_t crypto1_bit(struct Crypto1State *s, uint8_t in, int is_encrypted)
 {
 	uint32_t feedin;
 	uint8_t ret = filter(s->odd);
+	uint32_t tmp;
 
 	feedin  = ret & !!is_encrypted;
 	feedin ^= !!in;
@@ -59,7 +60,9 @@ uint8_t crypto1_bit(struct Crypto1State *s, uint8_t in, int is_encrypted)
 	feedin ^= LF_POLY_EVEN & s->even;
 	s->even = s->even << 1 | parity(feedin);
 
-	s->odd ^= (s->odd ^= s->even, s->even ^= s->odd);
+	tmp = s->odd;
+	s->odd = s->even;
+	s->even = tmp;
 
 	return ret;
 }