| /* |
| * Copyright (c) 2015, 2016, 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.lr; |
| import static jdk.vm.ci.aarch64.AArch64.r0; |
| import static jdk.vm.ci.aarch64.AArch64.r1; |
| import static jdk.vm.ci.aarch64.AArch64.r2; |
| import static jdk.vm.ci.aarch64.AArch64.r3; |
| import static jdk.vm.ci.aarch64.AArch64.r4; |
| import static jdk.vm.ci.aarch64.AArch64.r5; |
| import static jdk.vm.ci.aarch64.AArch64.r6; |
| import static jdk.vm.ci.aarch64.AArch64.r7; |
| import static jdk.vm.ci.aarch64.AArch64.rscratch1; |
| import static jdk.vm.ci.aarch64.AArch64.rscratch2; |
| import static jdk.vm.ci.aarch64.AArch64.r12; |
| import static jdk.vm.ci.aarch64.AArch64.r27; |
| import static jdk.vm.ci.aarch64.AArch64.r28; |
| import static jdk.vm.ci.aarch64.AArch64.r29; |
| import static jdk.vm.ci.aarch64.AArch64.r31; |
| import static jdk.vm.ci.aarch64.AArch64.sp; |
| import static jdk.vm.ci.aarch64.AArch64.v0; |
| import static jdk.vm.ci.aarch64.AArch64.v1; |
| import static jdk.vm.ci.aarch64.AArch64.v2; |
| import static jdk.vm.ci.aarch64.AArch64.v3; |
| import static jdk.vm.ci.aarch64.AArch64.v4; |
| import static jdk.vm.ci.aarch64.AArch64.v5; |
| import static jdk.vm.ci.aarch64.AArch64.v6; |
| import static jdk.vm.ci.aarch64.AArch64.v7; |
| import static jdk.vm.ci.aarch64.AArch64.zr; |
| |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| import jdk.vm.ci.aarch64.AArch64; |
| import jdk.vm.ci.code.Architecture; |
| import jdk.vm.ci.code.CallingConvention; |
| import jdk.vm.ci.code.CallingConvention.Type; |
| import jdk.vm.ci.code.Register; |
| import jdk.vm.ci.code.RegisterArray; |
| import jdk.vm.ci.code.RegisterAttributes; |
| import jdk.vm.ci.code.RegisterConfig; |
| import jdk.vm.ci.code.StackSlot; |
| import jdk.vm.ci.code.TargetDescription; |
| import jdk.vm.ci.code.ValueKindFactory; |
| import jdk.vm.ci.common.JVMCIError; |
| import jdk.vm.ci.hotspot.HotSpotCallingConventionType; |
| import jdk.vm.ci.meta.AllocatableValue; |
| import jdk.vm.ci.meta.JavaKind; |
| import jdk.vm.ci.meta.JavaType; |
| import jdk.vm.ci.meta.PlatformKind; |
| import jdk.vm.ci.meta.Value; |
| import jdk.vm.ci.meta.ValueKind; |
| |
| public class AArch64HotSpotRegisterConfig implements RegisterConfig { |
| |
| private final TargetDescription target; |
| |
| private final RegisterArray allocatable; |
| |
| /** |
| * The caller saved registers always include all parameter registers. |
| */ |
| private final RegisterArray callerSaved; |
| |
| private final boolean allAllocatableAreCallerSaved; |
| |
| private final RegisterAttributes[] attributesMap; |
| |
| @Override |
| public RegisterArray getAllocatableRegisters() { |
| return allocatable; |
| } |
| |
| @Override |
| public RegisterArray filterAllocatableRegisters(PlatformKind kind, RegisterArray registers) { |
| ArrayList<Register> list = new ArrayList<>(); |
| for (Register reg : registers) { |
| if (target.arch.canStoreValue(reg.getRegisterCategory(), kind)) { |
| list.add(reg); |
| } |
| } |
| |
| return new RegisterArray(list); |
| } |
| |
| @Override |
| public RegisterAttributes[] getAttributesMap() { |
| return attributesMap.clone(); |
| } |
| |
| private final RegisterArray javaGeneralParameterRegisters = new RegisterArray(r1, r2, r3, r4, r5, r6, r7, r0); |
| private final RegisterArray nativeGeneralParameterRegisters = new RegisterArray(r0, r1, r2, r3, r4, r5, r6, r7); |
| private final RegisterArray simdParameterRegisters = new RegisterArray(v0, v1, v2, v3, v4, v5, v6, v7); |
| |
| public static final Register inlineCacheRegister = rscratch2; |
| |
| /** |
| * Vtable stubs expect the metaspace Method in r12. |
| */ |
| public static final Register metaspaceMethodRegister = r12; |
| |
| public static final Register heapBaseRegister = r27; |
| public static final Register threadRegister = r28; |
| public static final Register fp = r29; |
| |
| private static final RegisterArray reservedRegisters |
| = new RegisterArray(rscratch1, rscratch2, threadRegister, fp, lr, r31, zr, sp); |
| |
| private static RegisterArray initAllocatable(Architecture arch, boolean reserveForHeapBase) { |
| RegisterArray allRegisters = arch.getAvailableValueRegisters(); |
| Register[] registers = new Register[allRegisters.size() - reservedRegisters.size() - (reserveForHeapBase ? 1 : 0)]; |
| List<Register> reservedRegistersList = reservedRegisters.asList(); |
| |
| int idx = 0; |
| for (Register reg : allRegisters) { |
| if (reservedRegistersList.contains(reg)) { |
| // skip reserved registers |
| continue; |
| } |
| assert !(reg.equals(threadRegister) || reg.equals(fp) || reg.equals(lr) || reg.equals(r31) || reg.equals(zr) || reg.equals(sp)); |
| if (reserveForHeapBase && reg.equals(heapBaseRegister)) { |
| // skip heap base register |
| continue; |
| } |
| |
| registers[idx++] = reg; |
| } |
| |
| assert idx == registers.length; |
| return new RegisterArray(registers); |
| } |
| |
| public AArch64HotSpotRegisterConfig(TargetDescription target, boolean useCompressedOops) { |
| this(target, initAllocatable(target.arch, useCompressedOops)); |
| assert callerSaved.size() >= allocatable.size(); |
| } |
| |
| public AArch64HotSpotRegisterConfig(TargetDescription target, RegisterArray allocatable) { |
| this.target = target; |
| |
| this.allocatable = allocatable; |
| Set<Register> callerSaveSet = new HashSet<>(); |
| allocatable.addTo(callerSaveSet); |
| simdParameterRegisters.addTo(callerSaveSet); |
| javaGeneralParameterRegisters.addTo(callerSaveSet); |
| nativeGeneralParameterRegisters.addTo(callerSaveSet); |
| callerSaved = new RegisterArray(callerSaveSet); |
| |
| allAllocatableAreCallerSaved = true; |
| attributesMap = RegisterAttributes.createMap(this, AArch64.allRegisters); |
| } |
| |
| @Override |
| public RegisterArray getCallerSaveRegisters() { |
| return callerSaved; |
| } |
| |
| public RegisterArray getCalleeSaveRegisters() { |
| return null; |
| } |
| |
| @Override |
| public boolean areAllAllocatableRegistersCallerSaved() { |
| return allAllocatableAreCallerSaved; |
| } |
| |
| @Override |
| public CallingConvention getCallingConvention(Type type, JavaType returnType, JavaType[] parameterTypes, ValueKindFactory<?> valueKindFactory) { |
| HotSpotCallingConventionType hotspotType = (HotSpotCallingConventionType) type; |
| if (type == HotSpotCallingConventionType.NativeCall) { |
| return callingConvention(nativeGeneralParameterRegisters, returnType, parameterTypes, hotspotType, valueKindFactory); |
| } |
| // On x64, parameter locations are the same whether viewed |
| // from the caller or callee perspective |
| return callingConvention(javaGeneralParameterRegisters, returnType, parameterTypes, hotspotType, valueKindFactory); |
| } |
| |
| @Override |
| public RegisterArray getCallingConventionRegisters(Type type, JavaKind kind) { |
| HotSpotCallingConventionType hotspotType = (HotSpotCallingConventionType) type; |
| switch (kind) { |
| case Boolean: |
| case Byte: |
| case Short: |
| case Char: |
| case Int: |
| case Long: |
| case Object: |
| return hotspotType == HotSpotCallingConventionType.NativeCall ? nativeGeneralParameterRegisters : javaGeneralParameterRegisters; |
| case Float: |
| case Double: |
| return simdParameterRegisters; |
| default: |
| throw JVMCIError.shouldNotReachHere(); |
| } |
| } |
| |
| private CallingConvention callingConvention(RegisterArray generalParameterRegisters, JavaType returnType, JavaType[] parameterTypes, HotSpotCallingConventionType type, |
| ValueKindFactory<?> valueKindFactory) { |
| AllocatableValue[] locations = new AllocatableValue[parameterTypes.length]; |
| |
| int currentGeneral = 0; |
| int currentSIMD = 0; |
| int currentStackOffset = 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 (currentGeneral < generalParameterRegisters.size()) { |
| Register register = generalParameterRegisters.get(currentGeneral++); |
| locations[i] = register.asValue(valueKindFactory.getValueKind(kind)); |
| } |
| break; |
| case Float: |
| case Double: |
| if (currentSIMD < simdParameterRegisters.size()) { |
| Register register = simdParameterRegisters.get(currentSIMD++); |
| locations[i] = register.asValue(valueKindFactory.getValueKind(kind)); |
| } |
| break; |
| default: |
| throw JVMCIError.shouldNotReachHere(); |
| } |
| |
| if (locations[i] == null) { |
| ValueKind<?> valueKind = valueKindFactory.getValueKind(kind); |
| locations[i] = StackSlot.get(valueKind, currentStackOffset, !type.out); |
| currentStackOffset += Math.max(valueKind.getPlatformKind().getSizeInBytes(), target.wordSize); |
| } |
| } |
| |
| JavaKind returnKind = returnType == null ? JavaKind.Void : returnType.getJavaKind(); |
| AllocatableValue returnLocation = returnKind == JavaKind.Void ? Value.ILLEGAL : getReturnRegister(returnKind).asValue(valueKindFactory.getValueKind(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 sp; |
| } |
| |
| @Override |
| public String toString() { |
| return String.format("Allocatable: " + getAllocatableRegisters() + "%n" + "CallerSave: " + getCallerSaveRegisters() + "%n"); |
| } |
| } |