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 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 30 31 /** 32 * This interface is used for {@link LIRInstruction}s which provide a delay slot for one instruction 33 * from another {@link LIRInstruction}. 34 * 35 * @see SPARCTailDelayedLIRInstruction 36 */ 37 public interface SPARCDelayedControlTransfer { 38 39 SPARCDelayedControlTransfer DUMMY = new SPARCDelayedControlTransfer() { 40 @Override 41 public void emitControlTransfer(CompilationResultBuilder crb, SPARCMacroAssembler masm) { 42 // do nothing 43 } 44 45 @Override 46 public String toString() { 47 return "null"; 48 } 49 50 @Override 51 public void resetState() { 52 } 53 }; 54 55 /** 56 * This method must be called, to generate the control transfer, but without any Nop in the 57 * delay slot. 58 * 59 * @param crb 60 * @param masm 61 */ 62 void emitControlTransfer(CompilationResultBuilder crb, SPARCMacroAssembler masm); 63 64 void resetState(); 65 }