| /* |
| * Copyright (c) 2000, 2001, 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 sun.jvm.hotspot.asm.sparc; |
| |
| import sun.jvm.hotspot.asm.*; |
| import sun.jvm.hotspot.utilities.*; |
| |
| /** SPARCArgument is an abstraction used to represent an outgoing |
| actual argument or an incoming formal parameter, whether it |
| resides in memory or in a register, in a manner consistent with |
| the SPARC Application Binary Interface, or ABI. This is often |
| referred to as the native or C calling convention. */ |
| |
| public class SPARCArgument { |
| private int number; |
| private boolean isIn; |
| |
| // FIXME: add 64-bit stuff here (support for FP registers) |
| |
| /** Only 6 registers may contain integer parameters */ |
| public static final int NUM_REGISTER_PARAMETERS = 6; |
| |
| public SPARCArgument(int number, boolean isIn) { |
| this.number = number; |
| this.isIn = isIn; |
| } |
| |
| int getNumber() { return number; } |
| boolean getIsIn() { return isIn; } |
| boolean getIsOut() { return !getIsIn(); } |
| |
| public SPARCArgument getSuccessor() { return new SPARCArgument(getNumber() + 1, getIsIn()); } |
| public SPARCArgument asIn() { return new SPARCArgument(getNumber(), true); } |
| public SPARCArgument asOut() { return new SPARCArgument(getNumber(), false); } |
| |
| /** Locating register-based arguments */ |
| public boolean isRegister() { return number < NUM_REGISTER_PARAMETERS; } |
| |
| public SPARCRegister asRegister() { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(isRegister(), "must be a register argument"); |
| } |
| return new SPARCRegister(getIsIn() ? SPARCRegisterType.IN : SPARCRegisterType.OUT, getNumber()); |
| } |
| |
| // locating memory-based arguments (FIXME: elided for now, will |
| // necessitate creating new SPARCAddress class) |
| // public SPARCAddress asAddress() { |
| // if (Assert.ASSERTS_ENABLED) { |
| // Assert.that(!isRegister(), "must be a memory argument"); |
| // } |
| // return addressInFrame(); |
| // } |
| // |
| // /** When applied to a register-based argument, give the corresponding address |
| // into the 6-word area "into which callee may store register arguments" |
| // (This is a different place than the corresponding register-save area location.) */ |
| // public SPARCAddress addressInFrame() const { |
| // return SPARCAddress( is_in() ? Address::extra_in_argument |
| // : Address::extra_out_argument, |
| // _number ); |
| // } |
| } |