Mercurial > hg > truffle
diff graal/com.oracle.jvmci.code/src/com/oracle/jvmci/code/RegisterConfig.java @ 21556:48c1ebd24120
renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Wed, 27 May 2015 00:36:16 +0200 |
parents | graal/com.oracle.graal.api.code/src/com/oracle/graal/api/code/RegisterConfig.java@badbe99cfaa4 |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.jvmci.code/src/com/oracle/jvmci/code/RegisterConfig.java Wed May 27 00:36:16 2015 +0200 @@ -0,0 +1,124 @@ +/* + * Copyright (c) 2009, 2011, 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.jvmci.code; + +import com.oracle.jvmci.meta.Kind; +import com.oracle.jvmci.meta.JavaType; +import com.oracle.jvmci.meta.PlatformKind; +import com.oracle.jvmci.code.CallingConvention.Type; + +/** + * A register configuration binds roles and {@linkplain RegisterAttributes attributes} to physical + * registers. + */ +public interface RegisterConfig { + + /** + * Gets the register to be used for returning a value of a given kind. + */ + Register getReturnRegister(Kind kind); + + /** + * Gets the maximum allowed size of the frame. + */ + default int getMaximumFrameSize() { + return Integer.MAX_VALUE; + } + + /** + * Gets the register to which {@link Register#Frame} and {@link Register#CallerFrame} are bound. + */ + Register getFrameRegister(); + + /** + * Gets the calling convention describing how arguments are passed. + * + * @param type the type of calling convention being requested + * @param returnType the return type (can be null for methods returning {@code void}) + * @param parameterTypes the types of the arguments of the call + * @param target the target platform + * @param stackOnly ignore registers + */ + CallingConvention getCallingConvention(Type type, JavaType returnType, JavaType[] parameterTypes, TargetDescription target, boolean stackOnly); + + /** + * Gets the ordered set of registers that are can be used to pass parameters according to a + * given calling convention. + * + * @param type the type of calling convention + * @param kind specifies what kind of registers is being requested + * @return the ordered set of registers that may be used to pass parameters in a call conforming + * to {@code type} + */ + Register[] getCallingConventionRegisters(Type type, Kind kind); + + /** + * Gets the set of all registers that might be used by the register allocator. + * + * To get the set of registers the register allocator is allowed to use see + * {@link RegisterAllocationConfig#getAllocatableRegisters()} + */ + @SuppressWarnings("javadoc") + Register[] getAllocatableRegisters(); + + /** + * Filters a set of registers and returns only those that can be used by the register allocator + * for a value of a particular kind. + */ + Register[] filterAllocatableRegisters(PlatformKind kind, Register[] registers); + + /** + * Gets the registers whose values must be preserved by a method across any call it makes. + */ + Register[] getCallerSaveRegisters(); + + /** + * Gets the layout of the callee save area of this register configuration. + * + * @return {@code null} if there is no callee save area + */ + CalleeSaveLayout getCalleeSaveLayout(); + + /** + * Gets a map from register {@linkplain Register#number numbers} to register + * {@linkplain RegisterAttributes attributes} for this register configuration. + * + * @return an array where an element at index i holds the attributes of the register whose + * number is i + */ + RegisterAttributes[] getAttributesMap(); + + /** + * Gets the register corresponding to a runtime-defined role. + * + * @param id the identifier of a runtime-defined register role + * @return the register playing the role specified by {@code id} + */ + Register getRegisterForRole(int id); + + /** + * Determines if all {@link #getAllocatableRegisters() allocatable} registers are + * {@link #getCallerSaveRegisters() caller saved}. + */ + boolean areAllAllocatableRegistersCallerSaved(); +}