src/cpu/sparc/vm/vm_version_sparc.hpp

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rev 5706 : 8029190: VM_Version::determine_features() asserts on Fujitsu Sparc64 CPUs

@@ -92,11 +92,17 @@
 
   // Returns true if the platform is in the niagara line (T series)
   static bool is_M_family(int features) { return (features & M_family_m) != 0; }
   static bool is_T_family(int features) { return (features & T_family_m) != 0; }
   static bool is_niagara() { return is_T_family(_features); }
-  DEBUG_ONLY( static bool is_niagara(int features)  { return (features & sun4v_m) != 0; } )
+#ifdef ASSERT
+  static bool is_niagara(int features)  {
+    // 'sun4v_m' may be defined on both Sun/Oracle Sparc CPUs as well as
+    // on Fujitsu Sparc64 CPUs, but only Sun/Oracle Sparcs can be 'niagaras'.
+    return (features & sun4v_m) != 0 && (features & sparc64_family_m) == 0;
+  }
+#endif
 
   // Returns true if it is niagara1 (T1).
   static bool is_T1_model(int features) { return is_T_family(features) && ((features & T1_model_m) != 0); }
 
   static int maximum_niagara1_processor_count() { return 32; }