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.d10;
30 import static jdk.vm.ci.sparc.SPARC.d12;
31 import static jdk.vm.ci.sparc.SPARC.d14;
32 import static jdk.vm.ci.sparc.SPARC.d16;
33 import static jdk.vm.ci.sparc.SPARC.d18;
34 import static jdk.vm.ci.sparc.SPARC.d2;
35 import static jdk.vm.ci.sparc.SPARC.d20;
36 import static jdk.vm.ci.sparc.SPARC.d22;
37 import static jdk.vm.ci.sparc.SPARC.d24;
38 import static jdk.vm.ci.sparc.SPARC.d26;
39 import static jdk.vm.ci.sparc.SPARC.d28;
40 import static jdk.vm.ci.sparc.SPARC.d30;
41 import static jdk.vm.ci.sparc.SPARC.d4;
42 import static jdk.vm.ci.sparc.SPARC.d6;
43 import static jdk.vm.ci.sparc.SPARC.d8;
44 import static jdk.vm.ci.sparc.SPARC.f0;
45 import static jdk.vm.ci.sparc.SPARC.f1;
46 import static jdk.vm.ci.sparc.SPARC.f11;
47 import static jdk.vm.ci.sparc.SPARC.f13;
48 import static jdk.vm.ci.sparc.SPARC.f15;
49 import static jdk.vm.ci.sparc.SPARC.f17;
50 import static jdk.vm.ci.sparc.SPARC.f19;
51 import static jdk.vm.ci.sparc.SPARC.f2;
52 import static jdk.vm.ci.sparc.SPARC.f21;
53 import static jdk.vm.ci.sparc.SPARC.f23;
54 import static jdk.vm.ci.sparc.SPARC.f25;
55 import static jdk.vm.ci.sparc.SPARC.f27;
56 import static jdk.vm.ci.sparc.SPARC.f29;
57 import static jdk.vm.ci.sparc.SPARC.f3;
58 import static jdk.vm.ci.sparc.SPARC.f31;
59 import static jdk.vm.ci.sparc.SPARC.f4;
60 import static jdk.vm.ci.sparc.SPARC.f5;
61 import static jdk.vm.ci.sparc.SPARC.f6;
62 import static jdk.vm.ci.sparc.SPARC.f7;
63 import static jdk.vm.ci.sparc.SPARC.f9;
64 import static jdk.vm.ci.sparc.SPARC.g0;
65 import static jdk.vm.ci.sparc.SPARC.g2;
66 import static jdk.vm.ci.sparc.SPARC.g6;
67 import static jdk.vm.ci.sparc.SPARC.i0;
68 import static jdk.vm.ci.sparc.SPARC.i1;
69 import static jdk.vm.ci.sparc.SPARC.i2;
70 import static jdk.vm.ci.sparc.SPARC.i3;
71 import static jdk.vm.ci.sparc.SPARC.i4;
72 import static jdk.vm.ci.sparc.SPARC.i5;
73 import static jdk.vm.ci.sparc.SPARC.i6;
74 import static jdk.vm.ci.sparc.SPARC.i7;
75 import static jdk.vm.ci.sparc.SPARC.l0;
76 import static jdk.vm.ci.sparc.SPARC.l1;
77 import static jdk.vm.ci.sparc.SPARC.l2;
78 import static jdk.vm.ci.sparc.SPARC.l3;
79 import static jdk.vm.ci.sparc.SPARC.l4;
80 import static jdk.vm.ci.sparc.SPARC.l5;
81 import static jdk.vm.ci.sparc.SPARC.l6;
82 import static jdk.vm.ci.sparc.SPARC.l7;
83 import static jdk.vm.ci.sparc.SPARC.o0;
84 import static jdk.vm.ci.sparc.SPARC.o1;
85 import static jdk.vm.ci.sparc.SPARC.o2;
86 import static jdk.vm.ci.sparc.SPARC.o3;
87 import static jdk.vm.ci.sparc.SPARC.o4;
88 import static jdk.vm.ci.sparc.SPARC.o5;
89 import static jdk.vm.ci.sparc.SPARC.sp;
90
91 import java.util.ArrayList;
92 import java.util.HashSet;
93 import java.util.List;
94
95 import jdk.vm.ci.code.Architecture;
96 import jdk.vm.ci.code.CallingConvention;
97 import jdk.vm.ci.code.CallingConvention.Type;
98 import jdk.vm.ci.code.Register;
99 import jdk.vm.ci.code.RegisterArray;
100 import jdk.vm.ci.code.RegisterAttributes;
101 import jdk.vm.ci.code.RegisterConfig;
102 import jdk.vm.ci.code.StackSlot;
103 import jdk.vm.ci.code.TargetDescription;
104 import jdk.vm.ci.code.ValueKindFactory;
105 import jdk.vm.ci.common.JVMCIError;
106 import jdk.vm.ci.hotspot.HotSpotCallingConventionType;
107 import jdk.vm.ci.meta.AllocatableValue;
108 import jdk.vm.ci.meta.JavaKind;
109 import jdk.vm.ci.meta.JavaType;
110 import jdk.vm.ci.meta.PlatformKind;
111 import jdk.vm.ci.meta.ValueKind;
112 import jdk.vm.ci.sparc.SPARC;
113
114 public class SPARCHotSpotRegisterConfig implements RegisterConfig {
115
116 private final TargetDescription target;
117
118 private final RegisterArray allocatable;
119
120 private final RegisterAttributes[] attributesMap;
121
122 @Override
123 public RegisterArray getAllocatableRegisters() {
124 return allocatable;
125 }
126
127 @Override
128 public RegisterArray filterAllocatableRegisters(PlatformKind kind, RegisterArray registers) {
129 ArrayList<Register> list = new ArrayList<>();
130 for (Register reg : registers) {
131 if (target.arch.canStoreValue(reg.getRegisterCategory(), kind)) {
132 list.add(reg);
133 }
134 }
135 return new RegisterArray(list);
136 }
137
138 @Override
139 public RegisterAttributes[] getAttributesMap() {
140 return attributesMap.clone();
141 }
142
143 private final RegisterArray cpuCallerParameterRegisters = new RegisterArray(o0, o1, o2, o3, o4, o5);
144 private final RegisterArray cpuCalleeParameterRegisters = new RegisterArray(i0, i1, i2, i3, i4, i5);
145
146 private final RegisterArray fpuFloatJavaParameterRegisters = new RegisterArray(f0, f1, f2, f3, f4, f5, f6, f7);
147 private final RegisterArray fpuDoubleJavaParameterRegisters = new RegisterArray(d0, null, d2, null, d4, null, d6, null);
148
149 // @formatter:off
150 private final RegisterArray fpuFloatNativeParameterRegisters = new RegisterArray(
151 f1, f3, f5, f7, f9, f11, f13, f15,
152 f17, f19, f21, f23, f25, f27, f29, f31);
153
154 private final RegisterArray fpuDoubleNativeParameterRegisters = new RegisterArray(
155 d0, d2, d4, d6, d8, d10, d12, d14,
156 d16, d18, d20, d22, d24, d26, d28, d30);
157
158 private final RegisterArray callerSaveRegisters;
159
160 /**
161 * This lists all L and I registers which are saved in the register window.
162 */
163 private final RegisterArray windowSaveRegisters = new RegisterArray(
164 l0, l1, l2, l3, l4, l5, l6, l7,
165 i0, i1, i2, i3, i4, i5, i6, i7);
166 // @formatter:on
167
168 private static final RegisterArray reservedRegisters = new RegisterArray(sp, g0, g2);
169
170 private static RegisterArray initAllocatable(Architecture arch, boolean reserveForHeapBase) {
171 RegisterArray allRegisters = arch.getAvailableValueRegisters();
172 Register[] registers = new Register[allRegisters.size() - reservedRegisters.size() - (reserveForHeapBase ? 1 : 0)];
173 List<Register> reservedRegistersList = reservedRegisters.asList();
174
175 int idx = 0;
176 for (Register reg : allRegisters) {
177 if (reservedRegistersList.contains(reg)) {
178 // skip reserved registers
179 continue;
180 }
181 if (reserveForHeapBase && reg.equals(g6)) {
182 // skip heap base register
183 continue;
184 }
185
186 registers[idx++] = reg;
187 }
188
189 assert idx == registers.length;
190 return new RegisterArray(registers);
191 }
192
193 public SPARCHotSpotRegisterConfig(TargetDescription target, boolean useCompressedOops) {
194 this(target, initAllocatable(target.arch, useCompressedOops));
195 }
196
197 public SPARCHotSpotRegisterConfig(TargetDescription target, RegisterArray allocatable) {
198 this.target = target;
199 this.allocatable = allocatable;
200 HashSet<Register> callerSaveSet = new HashSet<>(target.arch.getAvailableValueRegisters().asList());
201 for (Register cs : windowSaveRegisters) {
202 callerSaveSet.remove(cs);
203 }
204 this.callerSaveRegisters = new RegisterArray(callerSaveSet);
205 attributesMap = RegisterAttributes.createMap(this, SPARC.allRegisters);
206 }
207
208 @Override
209 public RegisterArray getCallerSaveRegisters() {
210 return callerSaveRegisters;
211 }
212
213 @Override
214 public RegisterArray getCalleeSaveRegisters() {
215 return null;
216 }
217
218 @Override
219 public boolean areAllAllocatableRegistersCallerSaved() {
220 return false;
221 }
222
223 @Override
224 public CallingConvention getCallingConvention(Type type, JavaType returnType, JavaType[] parameterTypes, ValueKindFactory<?> valueKindFactory) {
225 HotSpotCallingConventionType hotspotType = (HotSpotCallingConventionType) type;
226 if (type == HotSpotCallingConventionType.JavaCall || type == HotSpotCallingConventionType.NativeCall) {
227 return callingConvention(cpuCallerParameterRegisters, returnType, parameterTypes, hotspotType, valueKindFactory);
228 }
229 if (type == HotSpotCallingConventionType.JavaCallee) {
230 return callingConvention(cpuCalleeParameterRegisters, returnType, parameterTypes, hotspotType, valueKindFactory);
231 }
232 throw JVMCIError.shouldNotReachHere();
233 }
234
235 @Override
236 public RegisterArray getCallingConventionRegisters(Type type, JavaKind kind) {
237 HotSpotCallingConventionType hotspotType = (HotSpotCallingConventionType) type;
238 switch (kind) {
239 case Boolean:
240 case Byte:
241 case Short:
242 case Char:
243 case Int:
244 case Long:
245 case Object:
246 return hotspotType == HotSpotCallingConventionType.JavaCallee ? cpuCalleeParameterRegisters : cpuCallerParameterRegisters;
247 case Double:
248 case Float:
249 return fpuFloatJavaParameterRegisters;
250 default:
251 throw JVMCIError.shouldNotReachHere("Unknown JavaKind " + kind);
252 }
253 }
254
255 private CallingConvention callingConvention(RegisterArray generalParameterRegisters, JavaType returnType, JavaType[] parameterTypes, HotSpotCallingConventionType type,
256 ValueKindFactory<?> valueKindFactory) {
257 AllocatableValue[] locations = new AllocatableValue[parameterTypes.length];
258
259 int currentGeneral = 0;
260 int currentFloating = 0;
261 int currentStackOffset = 0;
262 boolean isNative = type == HotSpotCallingConventionType.NativeCall;
263
264 for (int i = 0; i < parameterTypes.length; i++) {
265 final JavaKind kind = parameterTypes[i].getJavaKind().getStackKind();
266 if (isNative) {
267 RegisterArray registerSet;
268 switch (kind) {
269 case Byte:
270 case Boolean:
271 case Short:
272 case Char:
273 case Int:
274 case Long:
275 case Object:
276 registerSet = generalParameterRegisters;
277 break;
278 case Double:
279 registerSet = fpuDoubleNativeParameterRegisters;
280 break;
281 case Float:
282 registerSet = fpuFloatNativeParameterRegisters;
283 break;
284 default:
285 throw JVMCIError.shouldNotReachHere();
286 }
287 if (i < registerSet.size()) {
288 locations[i] = registerSet.get(i).asValue(valueKindFactory.getValueKind(kind));
289 currentStackOffset += target.arch.getWordSize();
290 }
291 } else {
292 switch (kind) {
293 case Byte:
294 case Boolean:
295 case Short:
296 case Char:
297 case Int:
298 case Long:
299 case Object:
300 if (currentGeneral < generalParameterRegisters.size()) {
301 Register register = generalParameterRegisters.get(currentGeneral++);
302 locations[i] = register.asValue(valueKindFactory.getValueKind(kind));
303 }
304 break;
305 case Double:
306 if (currentFloating < fpuFloatJavaParameterRegisters.size()) {
307 if (currentFloating % 2 != 0) {
308 // Make register number even to be a double reg
309 currentFloating++;
310 }
311 Register register = fpuDoubleJavaParameterRegisters.get(currentFloating);
312 currentFloating += 2; // Only every second is a double register
313 locations[i] = register.asValue(valueKindFactory.getValueKind(kind));
314 }
315 break;
316 case Float:
317 if (currentFloating < fpuFloatJavaParameterRegisters.size()) {
318 Register register = fpuFloatJavaParameterRegisters.get(currentFloating++);
319 locations[i] = register.asValue(valueKindFactory.getValueKind(kind));
320 }
321 break;
322 default:
323 throw JVMCIError.shouldNotReachHere();
324 }
325 }
326
327 if (locations[i] == null) {
328 ValueKind<?> valueKind = valueKindFactory.getValueKind(kind);
329 int typeSize = valueKind.getPlatformKind().getSizeInBytes();
330 if (isNative) {
331 currentStackOffset += target.arch.getWordSize() - typeSize;
332 }
333 currentStackOffset = roundUp(currentStackOffset, typeSize);
334 int slotOffset = currentStackOffset + REGISTER_SAFE_AREA_SIZE;
335 locations[i] = StackSlot.get(valueKind, slotOffset, !type.out);
336 currentStackOffset += typeSize;
337 }
338 }
339
340 JavaKind returnKind = returnType == null ? Void : returnType.getJavaKind();
341 AllocatableValue returnLocation = returnKind == Void ? ILLEGAL : getReturnRegister(returnKind, type).asValue(valueKindFactory.getValueKind(returnKind.getStackKind()));
342 return new CallingConvention(currentStackOffset, returnLocation, locations);
343 }
344
345 private static int roundUp(int number, int mod) {
346 return ((number + mod - 1) / mod) * mod;
347 }
348
349 @Override
350 public Register getReturnRegister(JavaKind kind) {
351 return getReturnRegister(kind, HotSpotCallingConventionType.JavaCallee);
352 }
353
354 private static Register getReturnRegister(JavaKind kind, HotSpotCallingConventionType type) {
355 switch (kind) {
356 case Boolean:
357 case Byte:
358 case Char:
359 case Short:
360 case Int:
361 case Long:
362 case Object:
363 return type == HotSpotCallingConventionType.JavaCallee ? i0 : o0;
364 case Float:
365 return f0;
366 case Double:
367 return d0;
368 case Void:
369 case Illegal:
370 return null;
371 default:
372 throw new UnsupportedOperationException("no return register for type " + kind);
373 }
374 }
375
376 @Override
377 public Register getFrameRegister() {
378 return sp;
379 }
380
381 @Override
382 public String toString() {
383 return String.format("Allocatable: " + getAllocatableRegisters() + "%n" + "CallerSave: " + getCallerSaveRegisters() + "%n");
384 }
385 }