--- /dev/null 1970-01-01 00:00:09.122103000 +0000 +++ new/src/jdk.vm.ci/share/classes/jdk.vm.ci.hotspot.aarch64/src/jdk/vm/ci/hotspot/aarch64/AArch64HotSpotRegisterConfig.java 2015-11-19 12:16:21.464904000 +0000 @@ -0,0 +1,248 @@ +/* + * Copyright (c) 2011, 2015, 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 jdk.vm.ci.hotspot.aarch64; + +import static jdk.vm.ci.aarch64.AArch64.*; + +import java.util.*; + +import jdk.vm.ci.aarch64.*; +import jdk.vm.ci.code.*; +import jdk.vm.ci.code.CallingConvention.*; +import jdk.vm.ci.common.*; +import jdk.vm.ci.hotspot.*; +import jdk.vm.ci.meta.*; + +public class AArch64HotSpotRegisterConfig implements RegisterConfig { + + private final Architecture architecture; + + private final Register[] allocatable; + + private final int maxFrameSize; + + /** + * The caller saved registers always include all parameter registers. + */ + private final Register[] callerSaved; + + private final boolean allAllocatableAreCallerSaved; + + private final RegisterAttributes[] attributesMap; + + public int getMaximumFrameSize() { + return maxFrameSize; + } + + @Override + public Register[] getAllocatableRegisters() { + return allocatable.clone(); + } + + public Register[] filterAllocatableRegisters(PlatformKind kind, Register[] registers) { + ArrayList list = new ArrayList<>(); + for (Register reg : registers) { + if (architecture.canStoreValue(reg.getRegisterCategory(), kind)) { + list.add(reg); + } + } + + Register[] ret = list.toArray(new Register[list.size()]); + return ret; + } + + @Override + public RegisterAttributes[] getAttributesMap() { + return attributesMap.clone(); + } + + private final Register[] javaGeneralParameterRegisters = {r1, r2, r3, r4, r5, r6, r7, r0}; + private final Register[] nativeGeneralParameterRegisters = {r0, r1, r2, r3, r4, r5, r6, r7}; + private final Register[] simdParameterRegisters = {v0, v1, v2, v3, v4, v5, v6, v7}; + + /* + * Some ABIs (e.g. Windows) require a so-called "home space", that + * is a save area on the stack to store the argument registers + */ + private final boolean needsNativeStackHomeSpace = false; + + private static Register[] initAllocatable(boolean reserveForHeapBase) { + Register[] registers = new Register[] { + r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, + r14, r15, r16, r17, r18, r19, r20, r21, r22, r23, r24, r25, + r26, + + v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, + v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, + v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, + v30, v31 + }; + return registers; + } + + public AArch64HotSpotRegisterConfig(Architecture architecture, HotSpotVMConfig config) { + this(architecture, config, initAllocatable(config.useCompressedOops)); + assert callerSaved.length >= allocatable.length; + } + + public AArch64HotSpotRegisterConfig(Architecture architecture, HotSpotVMConfig config, Register[] allocatable) { + this.architecture = architecture; + this.maxFrameSize = config.maxFrameSize; + + this.allocatable = allocatable.clone(); + Set callerSaveSet = new HashSet<>(); + Collections.addAll(callerSaveSet, allocatable); + Collections.addAll(callerSaveSet, simdParameterRegisters); + Collections.addAll(callerSaveSet, javaGeneralParameterRegisters); + Collections.addAll(callerSaveSet, nativeGeneralParameterRegisters); + callerSaved = callerSaveSet.toArray(new Register[callerSaveSet.size()]); + + allAllocatableAreCallerSaved = true; + attributesMap = RegisterAttributes.createMap(this, AArch64.allRegisters); + } + + @Override + public Register[] getCallerSaveRegisters() { + return callerSaved; + } + + public Register[] getCalleeSaveRegisters() { + return null; + } + + @Override + public boolean areAllAllocatableRegistersCallerSaved() { + return allAllocatableAreCallerSaved; + } + + @Override + public Register getRegisterForRole(int index) { + throw new UnsupportedOperationException(); + } + + @Override + public CallingConvention getCallingConvention(Type type, JavaType returnType, JavaType[] parameterTypes, TargetDescription target, boolean stackOnly) { + if (type == Type.NativeCall) { + return callingConvention(nativeGeneralParameterRegisters, returnType, parameterTypes, type, target, stackOnly); + } + // On x64, parameter locations are the same whether viewed + // from the caller or callee perspective + return callingConvention(javaGeneralParameterRegisters, returnType, parameterTypes, type, target, stackOnly); + } + + public Register[] getCallingConventionRegisters(Type type, JavaKind kind) { + switch (kind) { + case Boolean: + case Byte: + case Short: + case Char: + case Int: + case Long: + case Object: + return type == Type.NativeCall ? nativeGeneralParameterRegisters : javaGeneralParameterRegisters; + case Float: + case Double: + return simdParameterRegisters; + default: + throw JVMCIError.shouldNotReachHere(); + } + } + + private CallingConvention callingConvention(Register[] generalParameterRegisters, JavaType returnType, JavaType[] parameterTypes, Type type, TargetDescription target, boolean stackOnly) { + AllocatableValue[] locations = new AllocatableValue[parameterTypes.length]; + + int currentGeneral = 0; + int currentSIMD = 0; + int currentStackOffset = type == Type.NativeCall && needsNativeStackHomeSpace ? generalParameterRegisters.length * target.wordSize : 0; + + for (int i = 0; i < parameterTypes.length; i++) { + final JavaKind kind = parameterTypes[i].getJavaKind().getStackKind(); + + switch (kind) { + case Byte: + case Boolean: + case Short: + case Char: + case Int: + case Long: + case Object: + if (!stackOnly && currentGeneral < generalParameterRegisters.length) { + Register register = generalParameterRegisters[currentGeneral++]; + locations[i] = register.asValue(target.getLIRKind(kind)); + } + break; + case Float: + case Double: + if (!stackOnly && currentSIMD < simdParameterRegisters.length) { + Register register = simdParameterRegisters[currentSIMD++]; + locations[i] = register.asValue(target.getLIRKind(kind)); + } + break; + default: + throw JVMCIError.shouldNotReachHere(); + } + + if (locations[i] == null) { + LIRKind lirKind = target.getLIRKind(kind); + locations[i] = StackSlot.get(lirKind, currentStackOffset, !type.out); + currentStackOffset += Math.max(lirKind.getPlatformKind().getSizeInBytes(), target.wordSize); + } + } + + JavaKind returnKind = returnType == null ? JavaKind.Void : returnType.getJavaKind(); + AllocatableValue returnLocation = returnKind == JavaKind.Void ? Value.ILLEGAL : getReturnRegister(returnKind).asValue(target.getLIRKind(returnKind.getStackKind())); + return new CallingConvention(currentStackOffset, returnLocation, locations); + } + + @Override + public Register getReturnRegister(JavaKind kind) { + switch (kind) { + case Boolean: + case Byte: + case Char: + case Short: + case Int: + case Long: + case Object: + return r0; + case Float: + case Double: + return v0; + case Void: + case Illegal: + return null; + default: + throw new UnsupportedOperationException("no return register for type " + kind); + } + } + + @Override + public Register getFrameRegister() { + return r31; + } + + @Override + public String toString() { + return String.format("Allocatable: " + Arrays.toString(getAllocatableRegisters()) + "%n" + "CallerSave: " + Arrays.toString(getCallerSaveRegisters()) + "%n"); + } +}