Mercurial > hg > graal-jvmci-8
diff graal/Compiler/src/com/sun/c1x/globalstub/GlobalStub.java @ 2507:9ec15d6914ca
Pull over of compiler from maxine repository.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 11:43:22 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/Compiler/src/com/sun/c1x/globalstub/GlobalStub.java Wed Apr 27 11:43:22 2011 +0200 @@ -0,0 +1,76 @@ +/* + * Copyright (c) 2009, 2010, 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.sun.c1x.globalstub; + +import static com.sun.cri.ci.CiKind.*; + +import com.sun.cri.ci.*; + +/** + * A global stub is a shared routine that performs an operation on behalf of compiled code. + * Typically the routine is too large to inline, is infrequent, or requires runtime support. + * Global stubs are called with a callee-save convention; the global stub must save any + * registers it may destroy and then restore them upon return. This allows the register + * allocator to ignore calls to global stubs. Parameters to global stubs are + * passed on the stack in order to preserve registers for the rest of the code. + * + * @author Thomas Wuerthinger + * @author Ben L. Titzer + */ +public class GlobalStub { + + public enum Id { + + fneg(Float, Float), + dneg(Double, Double), + f2i(Int, Float), + f2l(Long, Float), + d2i(Int, Double), + d2l(Long, Double); + + public final CiKind resultKind; + public final CiKind[] arguments; + + private Id(CiKind resultKind, CiKind... args) { + this.resultKind = resultKind; + this.arguments = args; + } + } + + public final Id id; + public final CiKind resultKind; + public final Object stubObject; + public final int argsSize; + public final int[] argOffsets; + public final int resultOffset; + + public GlobalStub(Id id, CiKind resultKind, Object stubObject, int argsSize, int[] argOffsets, int resultOffset) { + this.id = id; + this.resultKind = resultKind; + this.stubObject = stubObject; + this.argsSize = argsSize; + this.argOffsets = argOffsets; + this.resultOffset = resultOffset; + } + +}