1 /* 2 * Copyright (c) 2013, 2014, 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 package org.graalvm.compiler.lir.sparc; 24 25 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler; 26 import org.graalvm.compiler.lir.LIRInstruction; 27 28 /** 29 * Implementors of this interface are able to place its last instruction into the delay slot of a 30 * {@link SPARCDelayedControlTransfer} instruction. 31 * 32 * The implementor has to do following steps to emit code into the delay slot for the 33 * DelayedControlTransfer instruction: 34 * <ol> 35 * <li>Emit everything up to the second last instruction.</li> 36 * <li>Call 37 * {@link SPARCDelayedControlTransfer#emitControlTransfer(org.graalvm.compiler.lir.asm.CompilationResultBuilder, SPARCMacroAssembler)} 38 * to let the DelayedControlTransfer instruction emit its own code (But must not stuff the delay 39 * slot with Nop)</li> 40 * <li>emit the last instruction for this {@link LIRInstruction}</li> 41 * </ol> 42 * 43 * Note: If this instruction decides not to use the delay slot, it can skip the call of 44 * {@link SPARCDelayedControlTransfer#emitControlTransfer(org.graalvm.compiler.lir.asm.CompilationResultBuilder, SPARCMacroAssembler)} 45 * . The DelayedControlTransfer instruction will emit the code just with Nop in the delay slot. 46 */ 47 public interface SPARCTailDelayedLIRInstruction extends SPARCLIRInstructionMixin { 48 default void setDelayedControlTransfer(SPARCDelayedControlTransfer holder) { 49 getSPARCLIRInstructionStore().delayedControlTransfer = holder; 50 } 51 52 default SPARCDelayedControlTransfer getDelayedControlTransfer() { 53 return getSPARCLIRInstructionStore().delayedControlTransfer; 54 } 55 }