1 /*
   2  * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 
  25 package org.graalvm.compiler.hotspot.aarch64;
  26 
  27 import static jdk.vm.ci.hotspot.aarch64.AArch64HotSpotRegisterConfig.inlineCacheRegister;
  28 
  29 import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
  30 import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
  31 import org.graalvm.compiler.lir.LIRFrameState;
  32 import org.graalvm.compiler.lir.LIRInstructionClass;
  33 import org.graalvm.compiler.lir.Opcode;
  34 import org.graalvm.compiler.lir.aarch64.AArch64Call.DirectCallOp;
  35 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
  36 import org.graalvm.compiler.nodes.CallTargetNode.InvokeKind;
  37 
  38 import jdk.vm.ci.meta.ResolvedJavaMethod;
  39 import jdk.vm.ci.meta.Value;
  40 
  41 /**
  42  * A direct call that complies with the conventions for such calls in HotSpot. In particular, for
  43  * calls using an inline cache, a MOVE instruction is emitted just prior to the aligned direct call.
  44  */
  45 @Opcode("CALL_DIRECT")
  46 final class AArch64HotSpotDirectStaticCallOp extends DirectCallOp {
  47 
  48     public static final LIRInstructionClass<AArch64HotSpotDirectStaticCallOp> TYPE = LIRInstructionClass.create(AArch64HotSpotDirectStaticCallOp.class);
  49 
  50     private final InvokeKind invokeKind;
  51     private final GraalHotSpotVMConfig config;
  52 
  53     AArch64HotSpotDirectStaticCallOp(ResolvedJavaMethod target, Value result, Value[] parameters, Value[] temps, LIRFrameState state, InvokeKind invokeKind, GraalHotSpotVMConfig config) {
  54         super(TYPE, target, result, parameters, temps, state);
  55         assert invokeKind.isDirect();
  56         this.invokeKind = invokeKind;
  57         this.config = config;
  58     }
  59 
  60     @Override
  61     public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
  62         // The mark for an invocation that uses an inline cache must be placed at the
  63         // instruction that loads the Klass from the inline cache.
  64         // For the first invocation this is set to a bitpattern that is guaranteed to never be a
  65         // valid object which causes the called function to call a handler that installs the
  66         // correct inline cache value here.
  67         crb.recordMark(invokeKind == InvokeKind.Static ? config.MARKID_INVOKESTATIC : config.MARKID_INVOKESPECIAL);
  68         masm.movNativeAddress(inlineCacheRegister, config.nonOopBits);
  69         super.emitCode(crb, masm);
  70     }
  71 }