src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.asm.amd64/src/org/graalvm/compiler/asm/amd64/AMD64MacroAssembler.java

rev 52509 : [mq]: graal

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2009, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2009, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.

@@ -22,10 +22,12 @@
  */
 
 
 package org.graalvm.compiler.asm.amd64;
 
+import static jdk.vm.ci.amd64.AMD64.rbp;
+import static jdk.vm.ci.amd64.AMD64.rsp;
 import static org.graalvm.compiler.asm.amd64.AMD64AsmOptions.UseIncDec;
 import static org.graalvm.compiler.asm.amd64.AMD64AsmOptions.UseXmmLoadAndClearUpper;
 import static org.graalvm.compiler.asm.amd64.AMD64AsmOptions.UseXmmRegToRegMoveAll;
 
 import org.graalvm.compiler.core.common.NumUtil;

@@ -80,10 +82,24 @@
         } else {
             subq(dst, value);
         }
     }
 
+    public final void enter(int frameSize) {
+        if (NumUtil.isUShort(frameSize)) {
+            // Can use enter instruction only for frame size that fits in 16 bits.
+            emitByte(0xC8);
+            emitShort(frameSize);
+            emitByte(0x00);
+        } else {
+            // Fall back to manual sequence.
+            push(rbp);
+            movq(rbp, rsp);
+            decrementq(rsp, frameSize);
+        }
+    }
+
     public void incrementq(Register reg, int value) {
         if (value == Integer.MIN_VALUE) {
             addq(reg, value);
             return;
         }