diff --git a/openmp/runtime/src/dllexports b/openmp/runtime/src/dllexports
--- a/openmp/runtime/src/dllexports
+++ b/openmp/runtime/src/dllexports
@@ -1243,7 +1243,6 @@
     %ifdef IS_IA_ARCH
     __kmpc_atomic_float10_max              2139
     __kmpc_atomic_float10_min              2140
-    %endif
     __kmpc_atomic_float10_max_cpt          2141
     __kmpc_atomic_float10_min_cpt          2142
 
@@ -1263,6 +1262,7 @@
     __kmpc_atomic_val_2_cas_cpt            2156
     __kmpc_atomic_val_4_cas_cpt            2157
     __kmpc_atomic_val_8_cas_cpt            2158
+    %endif
 
 %endif
 
diff --git a/openmp/runtime/src/kmp_os.h b/openmp/runtime/src/kmp_os.h
--- a/openmp/runtime/src/kmp_os.h
+++ b/openmp/runtime/src/kmp_os.h
@@ -618,6 +618,54 @@
 //   *)&v); return *(kmp_real64 *)&tmp;
 // }
 
+#elif KMP_ARCH_AARCH64 && defined(__GNUC__)
+
+/* cast p to correct type so that proper intrinsic will be used */
+#define KMP_TEST_THEN_INC64(p)                                                 \
+  __sync_fetch_and_add((volatile kmp_int64 *)(p), 1LL)
+#define KMP_TEST_THEN_INC_ACQ64(p)                                             \
+  __sync_fetch_and_add((volatile kmp_int64 *)(p), 1LL)
+#define KMP_TEST_THEN_ADD4_64(p)                                               \
+  __sync_fetch_and_add((volatile kmp_int64 *)(p), 4LL)
+#define KMP_TEST_THEN_ADD4_ACQ64(p)                                            \
+  __sync_fetch_and_add((volatile kmp_int64 *)(p), 4LL)
+#define KMP_TEST_THEN_DEC64(p)                                                 \
+  __sync_fetch_and_sub((volatile kmp_int64 *)(p), 1LL)
+#define KMP_TEST_THEN_DEC_ACQ64(p)                                             \
+  __sync_fetch_and_sub((volatile kmp_int64 *)(p), 1LL)
+#define KMP_TEST_THEN_ADD64(p, v)                                              \
+  __sync_fetch_and_add((volatile kmp_int64 *)(p), (kmp_int64)(v))
+#define KMP_COMPARE_AND_STORE_ACQ8(p, cv, sv)                                  \
+  __sync_bool_compare_and_swap((volatile kmp_uint8 *)(p), (kmp_uint8)(cv),     \
+                               (kmp_uint8)(sv))
+#define KMP_COMPARE_AND_STORE_REL8(p, cv, sv)                                  \
+  __sync_bool_compare_and_swap((volatile kmp_uint8 *)(p), (kmp_uint8)(cv),     \
+                               (kmp_uint8)(sv))
+#define KMP_COMPARE_AND_STORE_ACQ16(p, cv, sv)                                 \
+  __sync_bool_compare_and_swap((volatile kmp_uint16 *)(p), (kmp_uint16)(cv),   \
+                               (kmp_uint16)(sv))
+#define KMP_COMPARE_AND_STORE_REL16(p, cv, sv)                                 \
+  __sync_bool_compare_and_swap((volatile kmp_uint16 *)(p), (kmp_uint16)(cv),   \
+                               (kmp_uint16)(sv))
+#define KMP_COMPARE_AND_STORE_ACQ32(p, cv, sv)                                 \
+  __sync_bool_compare_and_swap((volatile kmp_uint32 *)(p), (kmp_uint32)(cv),   \
+                               (kmp_uint32)(sv))
+#define KMP_COMPARE_AND_STORE_REL32(p, cv, sv)                                 \
+  __sync_bool_compare_and_swap((volatile kmp_uint32 *)(p), (kmp_uint32)(cv),   \
+                               (kmp_uint32)(sv))
+#define KMP_COMPARE_AND_STORE_ACQ64(p, cv, sv)                                 \
+  __sync_bool_compare_and_swap((volatile kmp_uint64 *)(p), (kmp_uint64)(cv),   \
+                               (kmp_uint64)(sv))
+#define KMP_COMPARE_AND_STORE_REL64(p, cv, sv)                                 \
+  __sync_bool_compare_and_swap((volatile kmp_uint64 *)(p), (kmp_uint64)(cv),   \
+                               (kmp_uint64)(sv))
+#define KMP_COMPARE_AND_STORE_RET64(p, cv, sv)                                 \
+  __sync_val_compare_and_swap((volatile kmp_uint64 *)(p), (kmp_uint64)(cv),    \
+                              (kmp_uint64)(sv))
+#define KMP_COMPARE_AND_STORE_PTR(p, cv, sv)                                   \
+  __sync_bool_compare_and_swap((void *volatile *)(p), (void *)(cv),            \
+                               (void *)(sv))
+
 #else // !KMP_ARCH_AARCH64
 
 // Routines that we still need to implement in assembly.
diff --git a/openmp/runtime/src/kmp_utility.cpp b/openmp/runtime/src/kmp_utility.cpp
--- a/openmp/runtime/src/kmp_utility.cpp
+++ b/openmp/runtime/src/kmp_utility.cpp
@@ -370,7 +370,7 @@
         case 'I':
         case 'i': {
           pid_t id = getpid();
-#if KMP_ARCH_X86_64 && defined(__MINGW32__)
+#if (KMP_ARCH_X86_64 || KMP_ARCH_AARCH64) && defined(__MINGW32__)
           snp_result = KMP_SNPRINTF(pos, end - pos + 1, "%0*lld", width, id);
 #else
           snp_result = KMP_SNPRINTF(pos, end - pos + 1, "%0*d", width, id);