commit 601bd11062c551b108adbb43ba99f199b840777c
author Ken MacKay <kmackay@gmail.com> Mon Jun 19 18:51:53 2017 -0700
committer Ken MacKay <kmackay@gmail.com> Mon Jun 19 18:52:33 2017 -0700
tree 9fddfcab9743355455c60781f84ff3181f9236e7
parent a76bd3f0471c9da3818c7a25a03f5a12522a4f0b

Fix for #111

asm_avr.inc

diff --git a/asm_avr.inc b/asm_avr.inc
index c988040..05f2aed 100644
--- a/asm_avr.inc
+++ b/asm_avr.inc
@@ -889,7 +889,7 @@
         
         "adc %[borrow], %[borrow] \n\t" /* Store carry bit in borrow. */
 
-        : "+z" (r), "+x" (left), "+y" (right), [i] "+r" (i),
+        : "+z" (r), "+x" (left), "+y" (right), [i] "+r" (num_words),
             [borrow] "+r" (borrow), [left] "=&r" (left_byte), [right] "=&r" (right_byte)
         :
         : "cc"