@@ -, +, @@ 
-- `strexeq r4,r1,[r2]'
-- `strexeq r1,r4,[r2]'
-- `strexeq r1,r2,[r0]'
---
 lib/direct/atomic.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
--- a/lib/direct/atomic.h	
+++ a/lib/direct/atomic.h	
@@ -191,9 +191,10 @@ static inline int _D__atomic_cmpxchg(volatile int *ptr, int old, int _new)
 
 	do {
 		__asm__ __volatile__("@ atomic_cmpxchg\n"
+		"movs	%0, #0\n"
 		"ldrex	%1, [%2]\n"
-		"mov	%0, #0\n"
-		"teq	%1, %3\n"
+		"cmp	%1, %3\n"
+		"it	eq\n"
 		"strexeq %0, %4, [%2]\n"
 		    : "=&r" (res), "=&r" (oldval)
 		    : "r" (ptr), "Ir" (old), "r" (_new)
--