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diff src/cpu/sparc/vm/vm_version_sparc.cpp @ 643:c771b7f43bbf

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6378821: bitCount() should use POPC on SPARC processors and AMD+10h Summary: bitCount() should use POPC on SPARC processors where POPC is implemented directly in hardware. Reviewed-by: kvn, never
author twisti
date Fri, 13 Mar 2009 11:35:17 -0700
parents 660978a2a31a
children f6da6f0174ac
line wrap: on
line diff
--- a/src/cpu/sparc/vm/vm_version_sparc.cpp	Thu Mar 12 10:37:46 2009 -0700
+++ b/src/cpu/sparc/vm/vm_version_sparc.cpp	Fri Mar 13 11:35:17 2009 -0700
@@ -92,10 +92,18 @@
 #endif
   }
 
+  // Use hardware population count instruction if available.
+  if (has_hardware_popc()) {
+    if (FLAG_IS_DEFAULT(UsePopCountInstruction)) {
+      UsePopCountInstruction = true;
+    }
+  }
+
   char buf[512];
-  jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s%s%s",
+  jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s%s%s%s",
                (has_v8() ? ", has_v8" : ""),
                (has_v9() ? ", has_v9" : ""),
+               (has_hardware_popc() ? ", popc" : ""),
                (has_vis1() ? ", has_vis1" : ""),
                (has_vis2() ? ", has_vis2" : ""),
                (is_ultra3() ? ", is_ultra3" : ""),