| /* |
| * Copyright (c) 2013, 2016, 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. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package org.graalvm.compiler.lir.sparc; |
| |
| import static org.graalvm.compiler.asm.sparc.SPARCAssembler.BPCC; |
| import static org.graalvm.compiler.asm.sparc.SPARCAssembler.Annul.NOT_ANNUL; |
| import static org.graalvm.compiler.asm.sparc.SPARCAssembler.BranchPredict.PREDICT_TAKEN; |
| import static org.graalvm.compiler.asm.sparc.SPARCAssembler.CC.Xcc; |
| import static org.graalvm.compiler.asm.sparc.SPARCAssembler.ConditionFlag.Always; |
| |
| import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler; |
| import org.graalvm.compiler.lir.LIRInstructionClass; |
| import org.graalvm.compiler.lir.LabelRef; |
| import org.graalvm.compiler.lir.StandardOp.JumpOp; |
| import org.graalvm.compiler.lir.asm.CompilationResultBuilder; |
| |
| public final class SPARCJumpOp extends JumpOp implements SPARCDelayedControlTransfer, SPARCLIRInstructionMixin { |
| public static final LIRInstructionClass<SPARCJumpOp> TYPE = LIRInstructionClass.create(SPARCJumpOp.class); |
| public static final SizeEstimate SIZE = SizeEstimate.create(2); |
| |
| private boolean emitDone = false; |
| private int delaySlotPosition = -1; |
| private final SPARCLIRInstructionMixinStore store; |
| |
| public SPARCJumpOp(LabelRef destination) { |
| super(TYPE, destination); |
| this.store = new SPARCLIRInstructionMixinStore(SIZE); |
| } |
| |
| @Override |
| public void emitControlTransfer(CompilationResultBuilder crb, SPARCMacroAssembler masm) { |
| assert !emitDone; |
| if (!crb.isSuccessorEdge(destination())) { |
| BPCC.emit(masm, Xcc, Always, NOT_ANNUL, PREDICT_TAKEN, destination().label()); |
| delaySlotPosition = masm.position(); |
| } |
| emitDone = true; |
| } |
| |
| @Override |
| public void emitCode(CompilationResultBuilder crb) { |
| if (!crb.isSuccessorEdge(destination())) { |
| if (!emitDone) { |
| SPARCMacroAssembler masm = (SPARCMacroAssembler) crb.asm; |
| masm.jmp(destination().label()); |
| } else { |
| int disp = crb.asm.position() - delaySlotPosition; |
| assert disp == 4 : disp; |
| } |
| } |
| } |
| |
| @Override |
| public void resetState() { |
| delaySlotPosition = -1; |
| emitDone = false; |
| } |
| |
| @Override |
| public SPARCLIRInstructionMixinStore getSPARCLIRInstructionStore() { |
| return store; |
| } |
| } |