X-Git-Url: https://git.cryptolib.org/?p=avr-crypto-lib.git;a=blobdiff_plain;f=memxor.S;h=a32058bfc4c3c93d22abd82e23f83ae30d4e56e9;hp=885dad5338a4f4ad65391ed5f367c802736b6224;hb=4f50c75ee5a6cc88bf7ea71957ed509e298e6c25;hpb=7701e318e4e2bac7f84dbf6e368f1501814948fc

diff --git a/memxor.S b/memxor.S
index 885dad5..a32058b 100644
--- a/memxor.S
+++ b/memxor.S
@@ -17,15 +17,15 @@
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-/* 
+/*
  * File:        memxor.S
  * Author:      Daniel Otte
  * Date:        2008-08-07
  * License:     GPLv3 or later
  * Description: memxor, XORing one block into another
- * 
+ *
  */
- 
+
 /*
  * void memxor(void* dest, const void* src, uint16_t n);
  */
@@ -39,9 +39,7 @@ memxor:
 	movw r30, r24
 	movw r26, r22
 	movw r24, r20
-	tst r24
-	brne 1f
-	tst r25
+	adiw r24, 0
 	breq 2f
 1:
 	ld r20, X+
@@ -52,17 +50,17 @@ memxor:
 	brne 1b
 2:
 	ret
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