Changeset d685cb0

Timestamp:

Aug 21, 2020, 7:15:27 AM (4 years ago)

Author:

Peter A. Buhr <pabuhr@…>

Branches:

ADT, arm-eh, ast-experimental, enum, forall-pointer-decay, jacob/cs343-translation, master, new-ast-unique-expr, pthread-emulation, qualifiedEnum

Children:

636d115b

Parents:

e67a82d

Message:

add ARM equivalent for x86 rdtsc

File:

• libcfa/src/bits/defs.hfa (modified) (3 diffs)

libcfa/src/bits/defs.hfa

@@ -10 +10 @@
 // Created On       : Thu Nov  9 13:24:10 2017
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Tue Jan 28 22:38:27 2020
-// Update Count     : 9
+// Last Modified On : Thu Aug 13 22:00:23 2020
+// Update Count     : 19
 //
 
@@ -17 +17 @@
 
 #include <stdint.h>
+#include <assert.h>
 
 #define likely(x)   __builtin_expect(!!(x), 1)
@@ -47 +48 @@
 #endif
 
-static inline long long rdtscl(void) {
-    unsigned int lo, hi;
-    __asm__ __volatile__ ("rdtsc" : "=a"(lo), "=d"(hi));
-    return ( (unsigned long long)lo)|( ((unsigned long long)hi)<<32 );
+static inline long long int rdtscl(void) {
+        #if defined( __aarch64__ )
+        // https://github.com/google/benchmark/blob/v1.1.0/src/cycleclock.h#L116
+        long long int virtual_timer_value;
+        asm volatile("mrs %0, cntvct_el0" : "=r"(virtual_timer_value));
+        return virtual_timer_value;
+        #else
+        unsigned int lo, hi;
+        __asm__ __volatile__ ("rdtsc" : "=a"(lo), "=d"(hi));
+        return ( (unsigned long long)lo)|( ((unsigned long long)hi)<<32 );
+        #endif // __ARM_ARCH
 }