Mercurial > hg > graal-jvmci-8
view agent/src/share/classes/sun/jvm/hotspot/asm/sparc/JmplDecoder.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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/* * Copyright 2002 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ package sun.jvm.hotspot.asm.sparc; import sun.jvm.hotspot.asm.*; class JmplDecoder extends MemoryInstructionDecoder { JmplDecoder() { super(JMPL, "jmpl", RTLDT_UNSIGNED_WORD); } Instruction decodeMemoryInstruction(int instruction, SPARCRegisterIndirectAddress addr, SPARCRegister rd, SPARCInstructionFactory factory) { // this may be most probably indirect call or ret or retl Instruction instr = null; if (rd == SPARCRegisters.O7) { instr = factory.newIndirectCallInstruction(addr, rd); } else if (rd == SPARCRegisters.G0) { int disp = (int) addr.getDisplacement(); Register base = addr.getBase(); if (base == SPARCRegisters.I7 && disp == 8) { instr = factory.newReturnInstruction(addr, rd, false /* not leaf */); } else if (base == SPARCRegisters.O7 && disp == 8) { instr = factory.newReturnInstruction(addr, rd, true /* leaf */); } else { instr = factory.newJmplInstruction(addr, rd); } } else { instr = factory.newJmplInstruction(addr, rd); } return instr; } }