diff -r 328926869b15 -r 15c9a0e16269 src/cpu/x86/vm/x86_32.ad
--- a/src/cpu/x86/vm/x86_32.ad	Sat Apr 09 22:55:25 2011 -0700
+++ b/src/cpu/x86/vm/x86_32.ad	Mon Apr 11 15:30:31 2011 -0700
@@ -3423,7 +3423,7 @@
          masm.movptr(boxReg, tmpReg);                   // consider: LEA box, [tmp-2] 
 
          // Using a prefetchw helps avoid later RTS->RTO upgrades and cache probes
-         if ((EmitSync & 2048) && VM_Version::supports_3dnow() && os::is_MP()) {
+         if ((EmitSync & 2048) && VM_Version::supports_3dnow_prefetch() && os::is_MP()) {
             // prefetchw [eax + Offset(_owner)-2]
             masm.prefetchw(Address(rax, ObjectMonitor::owner_offset_in_bytes()-2));
          }
@@ -3467,7 +3467,7 @@
          masm.movptr(boxReg, tmpReg) ; 
 
          // Using a prefetchw helps avoid later RTS->RTO upgrades and cache probes
-         if ((EmitSync & 2048) && VM_Version::supports_3dnow() && os::is_MP()) {
+         if ((EmitSync & 2048) && VM_Version::supports_3dnow_prefetch() && os::is_MP()) {
             // prefetchw [eax + Offset(_owner)-2]
             masm.prefetchw(Address(rax, ObjectMonitor::owner_offset_in_bytes()-2));
          }
@@ -3614,7 +3614,7 @@
       // See also http://gee.cs.oswego.edu/dl/jmm/cookbook.html.
 
       masm.get_thread (boxReg) ;
-      if ((EmitSync & 4096) && VM_Version::supports_3dnow() && os::is_MP()) {
+      if ((EmitSync & 4096) && VM_Version::supports_3dnow_prefetch() && os::is_MP()) {
         // prefetchw [ebx + Offset(_owner)-2]
         masm.prefetchw(Address(rbx, ObjectMonitor::owner_offset_in_bytes()-2));
       }
@@ -7333,7 +7333,7 @@
 // Must be safe to execute with invalid address (cannot fault).
 
 instruct prefetchr0( memory mem ) %{
-  predicate(UseSSE==0 && !VM_Version::supports_3dnow());
+  predicate(UseSSE==0 && !VM_Version::supports_3dnow_prefetch());
   match(PrefetchRead mem);
   ins_cost(0);
   size(0);
@@ -7343,7 +7343,7 @@
 %}
 
 instruct prefetchr( memory mem ) %{
-  predicate(UseSSE==0 && VM_Version::supports_3dnow() || ReadPrefetchInstr==3);
+  predicate(UseSSE==0 && VM_Version::supports_3dnow_prefetch() || ReadPrefetchInstr==3);
   match(PrefetchRead mem);
   ins_cost(100);
 
@@ -7387,7 +7387,7 @@
 %}
 
 instruct prefetchw0( memory mem ) %{
-  predicate(UseSSE==0 && !VM_Version::supports_3dnow());
+  predicate(UseSSE==0 && !VM_Version::supports_3dnow_prefetch());
   match(PrefetchWrite mem);
   ins_cost(0);
   size(0);
@@ -7397,7 +7397,7 @@
 %}
 
 instruct prefetchw( memory mem ) %{
-  predicate(UseSSE==0 && VM_Version::supports_3dnow() || AllocatePrefetchInstr==3);
+  predicate(UseSSE==0 && VM_Version::supports_3dnow_prefetch() || AllocatePrefetchInstr==3);
   match( PrefetchWrite mem );
   ins_cost(100);