1 /*
   2  * Copyright (c) 2012, 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.sparc;
  26 
  27 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
  28 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.STACK;
  29 import static jdk.vm.ci.sparc.SPARC.g0;
  30 import static jdk.vm.ci.sparc.SPARCKind.XWORD;
  31 
  32 import org.graalvm.compiler.asm.sparc.SPARCAddress;
  33 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler;
  34 import org.graalvm.compiler.core.common.LIRKind;
  35 import org.graalvm.compiler.lir.LIRInstructionClass;
  36 import org.graalvm.compiler.lir.Opcode;
  37 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
  38 import org.graalvm.compiler.lir.sparc.SPARCDelayedControlTransfer;
  39 import org.graalvm.compiler.lir.sparc.SPARCLIRInstruction;
  40 import org.graalvm.compiler.lir.sparc.SPARCMove;
  41 
  42 import jdk.vm.ci.code.Register;
  43 import jdk.vm.ci.meta.Value;
  44 
  45 @Opcode("CRUNTIME_CALL_EPILOGUE")
  46 final class SPARCHotSpotCRuntimeCallEpilogueOp extends SPARCLIRInstruction {
  47     public static final LIRInstructionClass<SPARCHotSpotCRuntimeCallEpilogueOp> TYPE = LIRInstructionClass.create(SPARCHotSpotCRuntimeCallEpilogueOp.class);
  48     public static final SizeEstimate SIZE = SizeEstimate.create(11);
  49 
  50     private final int threadLastJavaSpOffset;
  51     private final int threadLastJavaPcOffset;
  52     private final int threadJavaFrameAnchorFlagsOffset;
  53     private final Register thread;
  54     @Use({REG, STACK}) protected Value threadTemp;
  55 
  56     SPARCHotSpotCRuntimeCallEpilogueOp(int threadLastJavaSpOffset, int threadLastJavaPcOffset, int threadJavaFrameAnchorFlagsOffset, Register thread, Value threadTemp) {
  57         super(TYPE, SIZE);
  58         this.threadLastJavaSpOffset = threadLastJavaSpOffset;
  59         this.threadLastJavaPcOffset = threadLastJavaPcOffset;
  60         this.threadJavaFrameAnchorFlagsOffset = threadJavaFrameAnchorFlagsOffset;
  61         this.thread = thread;
  62         this.threadTemp = threadTemp;
  63     }
  64 
  65     @Override
  66     public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
  67 
  68         // Restore the thread register when coming back from the runtime.
  69         SPARCMove.move(crb, masm, thread.asValue(LIRKind.value(XWORD)), threadTemp, SPARCDelayedControlTransfer.DUMMY);
  70 
  71         // Reset last Java frame, last Java PC and flags.
  72         masm.stx(g0, new SPARCAddress(thread, threadLastJavaSpOffset));
  73         masm.stx(g0, new SPARCAddress(thread, threadLastJavaPcOffset));
  74         masm.stw(g0, new SPARCAddress(thread, threadJavaFrameAnchorFlagsOffset));
  75     }
  76 }