Index: sys/arm64/include/endian.h
===================================================================
--- sys/arm64/include/endian.h	(revision 345754)
+++ sys/arm64/include/endian.h	(working copy)
@@ -60,13 +60,12 @@
 #define	__htons(x)        (__bswap16(x))
 
 static __inline __uint64_t
-__bswap64(__uint64_t x)
+__bswap64(__uint64_t v)
 {
 	__uint64_t ret;
 
-	__asm __volatile("rev %0, %1\n"
-			 : "=&r" (ret), "+r" (x));
-	
+	__asm("rev %0, %1\n" : "=r" (ret) : "r" (v));
+
 	return (ret);
 }
 
@@ -75,8 +74,7 @@
 {
 	__uint32_t ret;
 
-	__asm __volatile("rev32 %x0, %x1\n"
-			 : "=&r" (ret), "+r" (v));
+	__asm("rev32 %x0, %x1\n" : "=r" (ret) : "r" (v));
 	
 	return (ret);
 }
@@ -86,8 +84,7 @@
 {
 	__uint32_t ret;
 
-	__asm __volatile("rev16 %w0, %w1\n"
-			 : "=&r" (ret), "+r" (v));
+	__asm("rev16 %w0, %w1\n" : "=r" (ret) : "r" (v));
 
 	return ((__uint16_t)ret);
 }