diff --git a/openmp/runtime/src/kmp_affinity.cpp b/openmp/runtime/src/kmp_affinity.cpp
--- a/openmp/runtime/src/kmp_affinity.cpp
+++ b/openmp/runtime/src/kmp_affinity.cpp
@@ -1104,10 +1104,12 @@
   struct core_type_indexer {
     int operator()(const kmp_hw_thread_t &t) const {
       switch (t.attrs.get_core_type()) {
+#if KMP_ARCH_X86 || KMP_ARCH_X86_64
       case KMP_HW_CORE_TYPE_ATOM:
         return 1;
       case KMP_HW_CORE_TYPE_CORE:
         return 2;
+#endif
       case KMP_HW_CORE_TYPE_UNKNOWN:
         return 0;
       }
diff --git a/openmp/runtime/src/kmp_settings.cpp b/openmp/runtime/src/kmp_settings.cpp
--- a/openmp/runtime/src/kmp_settings.cpp
+++ b/openmp/runtime/src/kmp_settings.cpp
@@ -4994,11 +4994,14 @@
       if (attr_ptr) {
         attr.clear();
         // save the attribute
+#if KMP_ARCH_X86 || KMP_ARCH_X86_64
         if (__kmp_str_match("intel_core", -1, attr_ptr + 1)) {
           attr.set_core_type(KMP_HW_CORE_TYPE_CORE);
         } else if (__kmp_str_match("intel_atom", -1, attr_ptr + 1)) {
           attr.set_core_type(KMP_HW_CORE_TYPE_ATOM);
-        } else if (__kmp_str_match("eff", 3, attr_ptr + 1)) {
+        }
+#endif
+        if (__kmp_str_match("eff", 3, attr_ptr + 1)) {
           const char *number = attr_ptr + 1;
           // skip the eff[iciency] token
           while (isalpha(*number))