Disable direct clock register access on IOS and Android

as I find conflicting information on accessibility from non-priviledged processes

Author: martin-frbg

common_arm64.h

@@ -78,17 +78,18 @@ static void __inline blas_lock(volatile BLASULONG *address){
 
 #define BLAS_LOCK_DEFINED
 
+#if !defined(OS_DARWIN) && !defined (OS_ANDROID)
 static __inline BLASULONG rpcc(void){
   BLASULONG ret = 0;
 
-  __asm__ __volatile__ ("mrs %0,cntvct_el0":"=r"(ret));
+  __asm__ __volatile__ ("isb; mrs %0,cntvct_el0":"=r"(ret));
 
   return ret;
 }
 
 #define RPCC_DEFINED
 #define RPCC64BIT
- 
+#endif 
 
 static inline int blas_quickdivide(blasint x, blasint y){
   return x / y;