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.lir.sparc; 26 27 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler; 28 import org.graalvm.compiler.lir.LIRInstruction; 29 30 /** 31 * Implementors of this interface are able to place its last instruction into the delay slot of a 32 * {@link SPARCDelayedControlTransfer} instruction. 33 * 34 * The implementor has to do following steps to emit code into the delay slot for the 35 * DelayedControlTransfer instruction: 36 * <ol> 37 * <li>Emit everything up to the second last instruction.</li> 38 * <li>Call 39 * {@link SPARCDelayedControlTransfer#emitControlTransfer(org.graalvm.compiler.lir.asm.CompilationResultBuilder, SPARCMacroAssembler)} 40 * to let the DelayedControlTransfer instruction emit its own code (But must not stuff the delay 41 * slot with Nop)</li> 42 * <li>emit the last instruction for this {@link LIRInstruction}</li> 43 * </ol> 44 * 45 * Note: If this instruction decides not to use the delay slot, it can skip the call of 46 * {@link SPARCDelayedControlTransfer#emitControlTransfer(org.graalvm.compiler.lir.asm.CompilationResultBuilder, SPARCMacroAssembler)} 47 * . The DelayedControlTransfer instruction will emit the code just with Nop in the delay slot. 48 */ 49 public interface SPARCTailDelayedLIRInstruction extends SPARCLIRInstructionMixin { 50 default void setDelayedControlTransfer(SPARCDelayedControlTransfer holder) { 51 getSPARCLIRInstructionStore().delayedControlTransfer = holder; 52 } 53 54 default SPARCDelayedControlTransfer getDelayedControlTransfer() { 55 return getSPARCLIRInstructionStore().delayedControlTransfer; 56 } 57 }