--- /dev/null 2017-01-22 10:16:57.869617664 -0800 +++ new/src/jdk.internal.vm.ci/share/classes/jdk.vm.ci.hotspot.amd64/src/jdk/vm/ci/hotspot/amd64/AMD64HotSpotRegisterConfig.java 2017-02-15 16:55:40.786939988 -0800 @@ -0,0 +1,321 @@ +/* + * Copyright (c) 2011, 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.amd64; + +import static jdk.vm.ci.amd64.AMD64.r12; +import static jdk.vm.ci.amd64.AMD64.r15; +import static jdk.vm.ci.amd64.AMD64.r8; +import static jdk.vm.ci.amd64.AMD64.r9; +import static jdk.vm.ci.amd64.AMD64.rax; +import static jdk.vm.ci.amd64.AMD64.rcx; +import static jdk.vm.ci.amd64.AMD64.rdi; +import static jdk.vm.ci.amd64.AMD64.rdx; +import static jdk.vm.ci.amd64.AMD64.rsi; +import static jdk.vm.ci.amd64.AMD64.rsp; +import static jdk.vm.ci.amd64.AMD64.xmm0; +import static jdk.vm.ci.amd64.AMD64.xmm1; +import static jdk.vm.ci.amd64.AMD64.xmm2; +import static jdk.vm.ci.amd64.AMD64.xmm3; +import static jdk.vm.ci.amd64.AMD64.xmm4; +import static jdk.vm.ci.amd64.AMD64.xmm5; +import static jdk.vm.ci.amd64.AMD64.xmm6; +import static jdk.vm.ci.amd64.AMD64.xmm7; + +import java.util.ArrayList; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +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 AMD64HotSpotRegisterConfig 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 list = new ArrayList<>(); + for (Register reg : registers) { + if (target.arch.canStoreValue(reg.getRegisterCategory(), kind)) { + list.add(reg); + } + } + + RegisterArray ret = new RegisterArray(list); + return ret; + } + + @Override + public RegisterAttributes[] getAttributesMap() { + return attributesMap.clone(); + } + + private final RegisterArray javaGeneralParameterRegisters; + private final RegisterArray nativeGeneralParameterRegisters; + private final RegisterArray javaXMMParameterRegisters; + private final RegisterArray nativeXMMParameterRegisters; + private final boolean windowsOS; + + /* + * 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; + + private static final RegisterArray reservedRegisters = new RegisterArray(rsp, r15); + + private static RegisterArray initAllocatable(Architecture arch, boolean reserveForHeapBase) { + RegisterArray allRegisters = arch.getAvailableValueRegisters(); + Register[] registers = new Register[allRegisters.size() - reservedRegisters.size() - (reserveForHeapBase ? 1 : 0)]; + List reservedRegistersList = reservedRegisters.asList(); + + int idx = 0; + for (Register reg : allRegisters) { + if (reservedRegistersList.contains(reg)) { + // skip reserved registers + continue; + } + if (reserveForHeapBase && reg.equals(r12)) { + // skip heap base register + continue; + } + + registers[idx++] = reg; + } + + assert idx == registers.length; + return new RegisterArray(registers); + } + + public AMD64HotSpotRegisterConfig(TargetDescription target, boolean useCompressedOops, boolean windowsOs) { + this(target, initAllocatable(target.arch, useCompressedOops), windowsOs); + assert callerSaved.size() >= allocatable.size(); + } + + public AMD64HotSpotRegisterConfig(TargetDescription target, RegisterArray allocatable, boolean windowsOS) { + this.target = target; + this.windowsOS = windowsOS; + + if (windowsOS) { + javaGeneralParameterRegisters = new RegisterArray(rdx, r8, r9, rdi, rsi, rcx); + nativeGeneralParameterRegisters = new RegisterArray(rcx, rdx, r8, r9); + nativeXMMParameterRegisters = new RegisterArray(xmm0, xmm1, xmm2, xmm3); + this.needsNativeStackHomeSpace = true; + } else { + javaGeneralParameterRegisters = new RegisterArray(rsi, rdx, rcx, r8, r9, rdi); + nativeGeneralParameterRegisters = new RegisterArray(rdi, rsi, rdx, rcx, r8, r9); + nativeXMMParameterRegisters = new RegisterArray(xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7); + this.needsNativeStackHomeSpace = false; + } + javaXMMParameterRegisters = new RegisterArray(xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7); + + this.allocatable = allocatable; + Set callerSaveSet = new HashSet<>(); + allocatable.addTo(callerSaveSet); + javaXMMParameterRegisters.addTo(callerSaveSet); + callerSaveSet.addAll(javaGeneralParameterRegisters.asList()); + nativeGeneralParameterRegisters.addTo(callerSaveSet); + callerSaved = new RegisterArray(callerSaveSet); + + allAllocatableAreCallerSaved = true; + attributesMap = RegisterAttributes.createMap(this, target.arch.getRegisters()); + } + + @Override + public RegisterArray getCallerSaveRegisters() { + return callerSaved; + } + + @Override + 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, nativeXMMParameterRegisters, windowsOS, returnType, parameterTypes, hotspotType, valueKindFactory); + } + // On x64, parameter locations are the same whether viewed + // from the caller or callee perspective + return callingConvention(javaGeneralParameterRegisters, javaXMMParameterRegisters, false, 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 hotspotType == HotSpotCallingConventionType.NativeCall ? nativeXMMParameterRegisters : javaXMMParameterRegisters; + default: + throw JVMCIError.shouldNotReachHere(); + } + } + + /** + * Hand out registers matching the calling convention from the {@code generalParameterRegisters} + * and {@code xmmParameterRegisters} sets. Normally registers are handed out from each set + * individually based on the type of the argument. If the {@code unified} flag is true then hand + * out registers in a single sequence, selecting between the sets based on the type. This is to + * support the Windows calling convention which only ever passes 4 arguments in registers, no + * matter their types. + * + * @param generalParameterRegisters + * @param xmmParameterRegisters + * @param unified + * @param returnType + * @param parameterTypes + * @param type + * @param valueKindFactory + * @return the resulting calling convention + */ + private CallingConvention callingConvention(RegisterArray generalParameterRegisters, RegisterArray xmmParameterRegisters, boolean unified, JavaType returnType, JavaType[] parameterTypes, + HotSpotCallingConventionType type, + ValueKindFactory valueKindFactory) { + assert !unified || generalParameterRegisters.size() == xmmParameterRegisters.size() : "must be same size in unified mode"; + AllocatableValue[] locations = new AllocatableValue[parameterTypes.length]; + + int currentGeneral = 0; + int currentXMM = 0; + int currentStackOffset = type == HotSpotCallingConventionType.NativeCall && needsNativeStackHomeSpace ? generalParameterRegisters.size() * 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 (currentGeneral < generalParameterRegisters.size()) { + Register register = generalParameterRegisters.get(currentGeneral++); + locations[i] = register.asValue(valueKindFactory.getValueKind(kind)); + } + break; + case Float: + case Double: + if ((unified ? currentGeneral : currentXMM) < xmmParameterRegisters.size()) { + Register register = xmmParameterRegisters.get(unified ? currentGeneral++ : currentXMM++); + 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); + } + } + assert !unified || currentXMM == 0 : "shouldn't be used in unified mode"; + + 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 rax; + case Float: + case Double: + return xmm0; + case Void: + case Illegal: + return null; + default: + throw new UnsupportedOperationException("no return register for type " + kind); + } + } + + @Override + public Register getFrameRegister() { + return rsp; + } + + @Override + public String toString() { + return String.format("Allocatable: " + getAllocatableRegisters() + "%n" + "CallerSave: " + getCallerSaveRegisters() + "%n"); + } +}