1 /* 2 * Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package jdk.vm.ci.hotspot.sparc; 24 25 import static jdk.vm.ci.meta.JavaKind.Void; 26 import static jdk.vm.ci.meta.Value.ILLEGAL; 27 import static jdk.vm.ci.sparc.SPARC.REGISTER_SAFE_AREA_SIZE; 28 import static jdk.vm.ci.sparc.SPARC.d0; 29 import static jdk.vm.ci.sparc.SPARC.d2; 30 import static jdk.vm.ci.sparc.SPARC.d4; 31 import static jdk.vm.ci.sparc.SPARC.d6; 32 import static jdk.vm.ci.sparc.SPARC.f0; 33 import static jdk.vm.ci.sparc.SPARC.f1; 34 import static jdk.vm.ci.sparc.SPARC.f2; 35 import static jdk.vm.ci.sparc.SPARC.f3; 36 import static jdk.vm.ci.sparc.SPARC.f4; 37 import static jdk.vm.ci.sparc.SPARC.f5; 38 import static jdk.vm.ci.sparc.SPARC.f6; 39 import static jdk.vm.ci.sparc.SPARC.f7; 40 import static jdk.vm.ci.sparc.SPARC.g0; 41 import static jdk.vm.ci.sparc.SPARC.g2; 42 import static jdk.vm.ci.sparc.SPARC.g6; 43 import static jdk.vm.ci.sparc.SPARC.i0; 44 import static jdk.vm.ci.sparc.SPARC.i1; 45 import static jdk.vm.ci.sparc.SPARC.i2; 46 import static jdk.vm.ci.sparc.SPARC.i3; 47 import static jdk.vm.ci.sparc.SPARC.i4; 48 import static jdk.vm.ci.sparc.SPARC.i5; 49 import static jdk.vm.ci.sparc.SPARC.i6; 50 import static jdk.vm.ci.sparc.SPARC.i7; 51 import static jdk.vm.ci.sparc.SPARC.l0; 52 import static jdk.vm.ci.sparc.SPARC.l1; 53 import static jdk.vm.ci.sparc.SPARC.l2; 54 import static jdk.vm.ci.sparc.SPARC.l3; 55 import static jdk.vm.ci.sparc.SPARC.l4; 56 import static jdk.vm.ci.sparc.SPARC.l5; 57 import static jdk.vm.ci.sparc.SPARC.l6; 58 import static jdk.vm.ci.sparc.SPARC.l7; 59 import static jdk.vm.ci.sparc.SPARC.o0; 60 import static jdk.vm.ci.sparc.SPARC.o1; 61 import static jdk.vm.ci.sparc.SPARC.o2; 62 import static jdk.vm.ci.sparc.SPARC.o3; 63 import static jdk.vm.ci.sparc.SPARC.o4; 64 import static jdk.vm.ci.sparc.SPARC.o5; 65 import static jdk.vm.ci.sparc.SPARC.sp; 66 67 import java.util.ArrayList; 68 import java.util.Arrays; 69 import java.util.Collections; 70 import java.util.HashSet; 71 import java.util.List; 72 73 import jdk.vm.ci.code.Architecture; 74 import jdk.vm.ci.code.CallingConvention; 75 import jdk.vm.ci.code.CallingConvention.Type; 76 import jdk.vm.ci.code.Register; 77 import jdk.vm.ci.code.RegisterAttributes; 78 import jdk.vm.ci.code.RegisterConfig; 79 import jdk.vm.ci.code.StackSlot; 80 import jdk.vm.ci.code.TargetDescription; 81 import jdk.vm.ci.code.ValueKindFactory; 82 import jdk.vm.ci.common.JVMCIError; 83 import jdk.vm.ci.hotspot.HotSpotCallingConventionType; 84 import jdk.vm.ci.hotspot.HotSpotVMConfig; 85 import jdk.vm.ci.meta.AllocatableValue; 86 import jdk.vm.ci.meta.JavaKind; 87 import jdk.vm.ci.meta.JavaType; 88 import jdk.vm.ci.meta.PlatformKind; 89 import jdk.vm.ci.meta.ValueKind; 90 import jdk.vm.ci.sparc.SPARC; 91 92 public class SPARCHotSpotRegisterConfig implements RegisterConfig { 93 94 private final TargetDescription target; 95 96 private final Register[] allocatable; 97 98 private final RegisterAttributes[] attributesMap; 99 100 /** 101 * Does native code (C++ code) spill arguments in registers to the parent frame? 102 */ 103 private final boolean addNativeRegisterArgumentSlots; 104 105 @Override 106 public Register[] getAllocatableRegisters() { 107 return allocatable.clone(); 108 } 109 110 @Override 111 public Register[] filterAllocatableRegisters(PlatformKind kind, Register[] registers) { 112 ArrayList<Register> list = new ArrayList<>(); 113 for (Register reg : registers) { 114 if (target.arch.canStoreValue(reg.getRegisterCategory(), kind)) { 115 list.add(reg); 116 } 117 } 118 Register[] ret = list.toArray(new Register[list.size()]); 119 return ret; 120 } 121 122 @Override 123 public RegisterAttributes[] getAttributesMap() { 124 return attributesMap.clone(); 125 } 126 127 private final Register[] cpuCallerParameterRegisters = {o0, o1, o2, o3, o4, o5}; 128 private final Register[] cpuCalleeParameterRegisters = {i0, i1, i2, i3, i4, i5}; 129 130 private final Register[] fpuFloatParameterRegisters = {f0, f1, f2, f3, f4, f5, f6, f7}; 131 private final Register[] fpuDoubleParameterRegisters = {d0, null, d2, null, d4, null, d6, null}; 132 133 // @formatter:off 134 private final Register[] callerSaveRegisters; 135 136 /** 137 * Registers saved by the callee. This lists all L and I registers which are saved in the 138 * register window. 139 */ 140 private final Register[] calleeSaveRegisters = { 141 l0, l1, l2, l3, l4, l5, l6, l7, 142 i0, i1, i2, i3, i4, i5, i6, i7}; 143 // @formatter:on 144 145 private static final Register[] reservedRegisters = {sp, g0, g2}; 146 147 private static Register[] initAllocatable(Architecture arch, boolean reserveForHeapBase) { 148 Register[] allRegisters = arch.getAvailableValueRegisters(); 149 Register[] registers = new Register[allRegisters.length - reservedRegisters.length - (reserveForHeapBase ? 1 : 0)]; 150 List<Register> reservedRegistersList = Arrays.asList(reservedRegisters); 151 152 int idx = 0; 153 for (Register reg : allRegisters) { 154 if (reservedRegistersList.contains(reg)) { 155 // skip reserved registers 156 continue; 157 } 158 if (reserveForHeapBase && reg.equals(g6)) { 159 // skip heap base register 160 continue; 161 } 162 163 registers[idx++] = reg; 164 } 165 166 assert idx == registers.length; 167 return registers; 168 } 169 170 public SPARCHotSpotRegisterConfig(TargetDescription target, HotSpotVMConfig config) { 171 this(target, initAllocatable(target.arch, config.useCompressedOops), config); 172 } 173 174 public SPARCHotSpotRegisterConfig(TargetDescription target, Register[] allocatable, HotSpotVMConfig config) { 175 this.target = target; 176 this.allocatable = allocatable.clone(); 177 this.addNativeRegisterArgumentSlots = config.linuxOs; 178 HashSet<Register> callerSaveSet = new HashSet<>(); 179 Collections.addAll(callerSaveSet, target.arch.getAvailableValueRegisters()); 180 for (Register cs : calleeSaveRegisters) { 181 callerSaveSet.remove(cs); 182 } 183 this.callerSaveRegisters = callerSaveSet.toArray(new Register[callerSaveSet.size()]); 184 attributesMap = RegisterAttributes.createMap(this, SPARC.allRegisters); 185 } 186 187 @Override 188 public Register[] getCallerSaveRegisters() { 189 return callerSaveRegisters; 190 } 191 192 public Register[] getCalleeSaveRegisters() { 193 return calleeSaveRegisters; 194 } 195 196 @Override 197 public boolean areAllAllocatableRegistersCallerSaved() { 198 return false; 199 } 200 201 @Override 202 public CallingConvention getCallingConvention(Type type, JavaType returnType, JavaType[] parameterTypes, ValueKindFactory<?> valueKindFactory) { 203 HotSpotCallingConventionType hotspotType = (HotSpotCallingConventionType) type; 204 if (type == HotSpotCallingConventionType.JavaCall || type == HotSpotCallingConventionType.NativeCall) { 205 return callingConvention(cpuCallerParameterRegisters, returnType, parameterTypes, hotspotType, valueKindFactory); 206 } 207 if (type == HotSpotCallingConventionType.JavaCallee) { 208 return callingConvention(cpuCalleeParameterRegisters, returnType, parameterTypes, hotspotType, valueKindFactory); 209 } 210 throw JVMCIError.shouldNotReachHere(); 211 } 212 213 @Override 214 public Register[] getCallingConventionRegisters(Type type, JavaKind kind) { 215 HotSpotCallingConventionType hotspotType = (HotSpotCallingConventionType) type; 216 switch (kind) { 217 case Boolean: 218 case Byte: 219 case Short: 220 case Char: 221 case Int: 222 case Long: 223 case Object: 224 return hotspotType == HotSpotCallingConventionType.JavaCallee ? cpuCalleeParameterRegisters : cpuCallerParameterRegisters; 225 case Double: 226 case Float: 227 return fpuFloatParameterRegisters; 228 default: 229 throw JVMCIError.shouldNotReachHere("Unknown JavaKind " + kind); 230 } 231 } 232 233 private CallingConvention callingConvention(Register[] generalParameterRegisters, JavaType returnType, JavaType[] parameterTypes, HotSpotCallingConventionType type, 234 ValueKindFactory<?> valueKindFactory) { 235 AllocatableValue[] locations = new AllocatableValue[parameterTypes.length]; 236 237 int currentGeneral = 0; 238 int currentFloating = 0; 239 int currentStackOffset = 0; 240 241 for (int i = 0; i < parameterTypes.length; i++) { 242 final JavaKind kind = parameterTypes[i].getJavaKind().getStackKind(); 243 244 switch (kind) { 245 case Byte: 246 case Boolean: 247 case Short: 248 case Char: 249 case Int: 250 case Long: 251 case Object: 252 if (currentGeneral < generalParameterRegisters.length) { 253 Register register = generalParameterRegisters[currentGeneral++]; 254 locations[i] = register.asValue(valueKindFactory.getValueKind(kind)); 255 } 256 break; 257 case Double: 258 if (currentFloating < fpuFloatParameterRegisters.length) { 259 if (currentFloating % 2 != 0) { 260 // Make register number even to be a double reg 261 currentFloating++; 262 } 263 Register register = fpuDoubleParameterRegisters[currentFloating]; 264 currentFloating += 2; // Only every second is a double register 265 locations[i] = register.asValue(valueKindFactory.getValueKind(kind)); 266 } 267 break; 268 case Float: 269 if (currentFloating < fpuFloatParameterRegisters.length) { 270 Register register = fpuFloatParameterRegisters[currentFloating++]; 271 locations[i] = register.asValue(valueKindFactory.getValueKind(kind)); 272 } 273 break; 274 default: 275 throw JVMCIError.shouldNotReachHere(); 276 } 277 278 if (locations[i] == null) { 279 ValueKind<?> valueKind = valueKindFactory.getValueKind(kind); 280 // Stack slot is always aligned to its size in bytes but minimum wordsize 281 int typeSize = valueKind.getPlatformKind().getSizeInBytes(); 282 currentStackOffset = roundUp(currentStackOffset, typeSize); 283 int slotOffset = currentStackOffset + REGISTER_SAFE_AREA_SIZE; 284 locations[i] = StackSlot.get(valueKind, slotOffset, !type.out); 285 currentStackOffset += typeSize; 286 } 287 } 288 289 JavaKind returnKind = returnType == null ? Void : returnType.getJavaKind(); 290 AllocatableValue returnLocation = returnKind == Void ? ILLEGAL : getReturnRegister(returnKind, type).asValue(valueKindFactory.getValueKind(returnKind.getStackKind())); 291 292 int outArgSpillArea; 293 if (type == HotSpotCallingConventionType.NativeCall && addNativeRegisterArgumentSlots) { 294 // Space for native callee which may spill our outgoing arguments 295 outArgSpillArea = Math.min(locations.length, generalParameterRegisters.length) * target.wordSize; 296 } else { 297 outArgSpillArea = 0; 298 } 299 return new CallingConvention(currentStackOffset + outArgSpillArea, returnLocation, locations); 300 } 301 302 private static int roundUp(int number, int mod) { 303 return ((number + mod - 1) / mod) * mod; 304 } 305 306 @Override 307 public Register getReturnRegister(JavaKind kind) { 308 return getReturnRegister(kind, HotSpotCallingConventionType.JavaCallee); 309 } 310 311 private static Register getReturnRegister(JavaKind kind, HotSpotCallingConventionType type) { 312 switch (kind) { 313 case Boolean: 314 case Byte: 315 case Char: 316 case Short: 317 case Int: 318 case Long: 319 case Object: 320 return type == HotSpotCallingConventionType.JavaCallee ? i0 : o0; 321 case Float: 322 return f0; 323 case Double: 324 return d0; 325 case Void: 326 case Illegal: 327 return null; 328 default: 329 throw new UnsupportedOperationException("no return register for type " + kind); 330 } 331 } 332 333 @Override 334 public Register getFrameRegister() { 335 return sp; 336 } 337 338 @Override 339 public String toString() { 340 return String.format("Allocatable: " + Arrays.toString(getAllocatableRegisters()) + "%n" + "CallerSave: " + Arrays.toString(getCallerSaveRegisters()) + "%n"); 341 } 342 }