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view graal/com.oracle.graal.lir.sparc/src/com/oracle/graal/lir/sparc/SPARCTailDelayedLIRInstruction.java @ 19001:5a79fa76b489
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author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Wed, 28 Jan 2015 04:05:07 +0100 |
parents | c88ab4f1f04a |
children | 6df25b1418be |
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/* * Copyright (c) 2013, 2014, 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 com.oracle.graal.lir.sparc; import com.oracle.graal.lir.*; /** * Implementors of this interface are able to place its last instruction into the delay slot of a * {@link SPARCDelayedControlTransfer} instruction. * * The implementor has to do following steps to emit code into the delay slot for the * DelayedControlTransfer instruction: * <ol> * <li>Emit everything up to the second last instruction.</li> * <li>Call * {@link SPARCDelayedControlTransfer#emitControlTransfer(com.oracle.graal.lir.asm.CompilationResultBuilder, com.oracle.graal.asm.sparc.SPARCMacroAssembler)} * to let the DelayedControlTransfer instruction emit its own code (But must not stuff the delay * slot with Nop)</li> * <li>emit the last instruction for this {@link LIRInstruction}</li> * </ol> * * Note: If this instruction decides not to use the delay slot, it can skip the call of * {@link SPARCDelayedControlTransfer#emitControlTransfer(com.oracle.graal.lir.asm.CompilationResultBuilder, com.oracle.graal.asm.sparc.SPARCMacroAssembler)} * . The DelayedControlTransfer instruction will emit the code just with Nop in the delay slot. */ public interface SPARCTailDelayedLIRInstruction { void setDelayedControlTransfer(SPARCDelayedControlTransfer holder); }