From 3a09a13202669f38c03ba782eaf81ca7ce63abb0 Mon Sep 17 00:00:00 2001
From: roland <none@none>
Date: Thu, 20 Sep 2012 16:49:17 +0200
Subject: 7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement() Summary:
 use shorter instruction sequences for atomic add and atomic exchange when
 possible. Reviewed-by: kvn, jrose

---
 src/cpu/x86/vm/x86.ad | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/cpu/x86/vm/x86.ad')

diff --git a/src/cpu/x86/vm/x86.ad b/src/cpu/x86/vm/x86.ad
index 9a057a47f..c3831006b 100644
--- a/src/cpu/x86/vm/x86.ad
+++ b/src/cpu/x86/vm/x86.ad
@@ -503,6 +503,13 @@ const bool Matcher::match_rule_supported(int opcode) {
       if ((UseSSE < 4) && (UseAVX < 1)) // only with SSE4_1 or AVX
         return false;
     break;
+    case Op_CompareAndSwapL:
+#ifdef _LP64
+    case Op_CompareAndSwapP:
+#endif
+      if (!VM_Version::supports_cx8())
+        return false;
+    break;
   }
 
   return true;  // Per default match rules are supported.
-- 
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