001/*
002 * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.hotspot.sparc;
024
025import static com.oracle.graal.lir.LIRInstruction.OperandFlag.*;
026import static jdk.internal.jvmci.code.ValueUtil.*;
027import static jdk.internal.jvmci.sparc.SPARC.*;
028import jdk.internal.jvmci.code.*;
029import jdk.internal.jvmci.meta.*;
030
031import com.oracle.graal.asm.sparc.*;
032import com.oracle.graal.lir.*;
033import com.oracle.graal.lir.asm.*;
034import com.oracle.graal.lir.sparc.*;
035
036@Opcode("CRUNTIME_CALL_PROLOGUE")
037final class SPARCHotSpotCRuntimeCallPrologueOp extends SPARCLIRInstruction implements SPARCTailDelayedLIRInstruction {
038    public static final LIRInstructionClass<SPARCHotSpotCRuntimeCallPrologueOp> TYPE = LIRInstructionClass.create(SPARCHotSpotCRuntimeCallPrologueOp.class);
039    public static final SizeEstimate SIZE = SizeEstimate.create(10);
040
041    private final int threadLastJavaSpOffset;
042    private final Register thread;
043    private final Register stackPointer;
044    @Def({REG, STACK}) protected Value threadTemp;
045    @Temp({REG}) protected AllocatableValue spScratch;
046
047    public SPARCHotSpotCRuntimeCallPrologueOp(int threadLastJavaSpOffset, Register thread, Register stackPointer, Value threadTemp, AllocatableValue spScratch) {
048        super(TYPE, SIZE);
049        this.threadLastJavaSpOffset = threadLastJavaSpOffset;
050        this.thread = thread;
051        this.stackPointer = stackPointer;
052        this.threadTemp = threadTemp;
053        this.spScratch = spScratch;
054    }
055
056    @Override
057    public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
058        // Save last Java frame.
059        Register scratchRegister = asRegister(spScratch);
060        masm.add(stackPointer, STACK_BIAS, scratchRegister);
061        masm.stx(scratchRegister, new SPARCAddress(thread, threadLastJavaSpOffset));
062
063        // Save the thread register when calling out to the runtime.
064        SPARCMove.move(crb, masm, threadTemp, thread.asValue(LIRKind.value(Kind.Long)), delayedControlTransfer);
065    }
066}