rdtsc fix

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@695 c046a42c-6fe2-441c-8c8c-71466251a162

target-i386/helper.c

@@ -1796,7 +1796,7 @@ void helper_rdtsc(void)
 {
     uint64_t val;
 #if defined(__i386__) || defined(__x86_64__)
-    asm("rdtsc" : "=A" (val));
+    asm volatile ("rdtsc" : "=A" (val));
 #else
     /* better than nothing: the time increases */
     val = emu_time++;

vl.c

@@ -341,7 +341,7 @@ int64_t cpu_get_real_ticks(void)
 int64_t cpu_get_real_ticks(void)
 {
     int64_t val;
-    asm("rdtsc" : "=A" (val));
+    asm volatile ("rdtsc" : "=A" (val));
     return val;
 }