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comparison jvmci/jdk.vm.ci.hotspot.amd64/src/jdk/vm/ci/hotspot/amd64/AMD64HotSpotRegisterConfig.java @ 22672:1bbd4a7c274b

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Rename jdk.internal.jvmci to jdk.vm.ci
author Tom Rodriguez <tom.rodriguez@oracle.com>
date Thu, 08 Oct 2015 17:28:41 -0700
parents jvmci/jdk.internal.jvmci.hotspot.amd64/src/jdk/internal/jvmci/hotspot/amd64/AMD64HotSpotRegisterConfig.java@39f1499686ea
children d63506bb5237
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22671:97f30e4d0e95 22672:1bbd4a7c274b
1 /*
2 * Copyright (c) 2011, 2015, 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.amd64;
24
25 import static jdk.vm.ci.amd64.AMD64.r12;
26 import static jdk.vm.ci.amd64.AMD64.r15;
27 import static jdk.vm.ci.amd64.AMD64.r8;
28 import static jdk.vm.ci.amd64.AMD64.r9;
29 import static jdk.vm.ci.amd64.AMD64.rax;
30 import static jdk.vm.ci.amd64.AMD64.rcx;
31 import static jdk.vm.ci.amd64.AMD64.rdi;
32 import static jdk.vm.ci.amd64.AMD64.rdx;
33 import static jdk.vm.ci.amd64.AMD64.rsi;
34 import static jdk.vm.ci.amd64.AMD64.rsp;
35 import static jdk.vm.ci.amd64.AMD64.xmm0;
36 import static jdk.vm.ci.amd64.AMD64.xmm1;
37 import static jdk.vm.ci.amd64.AMD64.xmm2;
38 import static jdk.vm.ci.amd64.AMD64.xmm3;
39 import static jdk.vm.ci.amd64.AMD64.xmm4;
40 import static jdk.vm.ci.amd64.AMD64.xmm5;
41 import static jdk.vm.ci.amd64.AMD64.xmm6;
42 import static jdk.vm.ci.amd64.AMD64.xmm7;
43
44 import java.util.ArrayList;
45 import java.util.Arrays;
46 import java.util.Collections;
47 import java.util.HashSet;
48 import java.util.Set;
49
50 import jdk.vm.ci.code.Architecture;
51 import jdk.vm.ci.code.CallingConvention;
52 import jdk.vm.ci.code.CallingConvention.Type;
53 import jdk.vm.ci.code.Register;
54 import jdk.vm.ci.code.RegisterAttributes;
55 import jdk.vm.ci.code.RegisterConfig;
56 import jdk.vm.ci.code.StackSlot;
57 import jdk.vm.ci.code.TargetDescription;
58 import jdk.vm.ci.common.JVMCIError;
59 import jdk.vm.ci.hotspot.HotSpotVMConfig;
60 import jdk.vm.ci.meta.AllocatableValue;
61 import jdk.vm.ci.meta.JavaKind;
62 import jdk.vm.ci.meta.JavaType;
63 import jdk.vm.ci.meta.LIRKind;
64 import jdk.vm.ci.meta.PlatformKind;
65 import jdk.vm.ci.meta.Value;
66
67 public class AMD64HotSpotRegisterConfig implements RegisterConfig {
68
69 private final Architecture architecture;
70
71 private final Register[] allocatable;
72
73 private final int maxFrameSize;
74
75 /**
76 * The caller saved registers always include all parameter registers.
77 */
78 private final Register[] callerSaved;
79
80 private final boolean allAllocatableAreCallerSaved;
81
82 private final RegisterAttributes[] attributesMap;
83
84 public int getMaximumFrameSize() {
85 return maxFrameSize;
86 }
87
88 @Override
89 public Register[] getAllocatableRegisters() {
90 return allocatable.clone();
91 }
92
93 public Register[] filterAllocatableRegisters(PlatformKind kind, Register[] registers) {
94 ArrayList<Register> list = new ArrayList<>();
95 for (Register reg : registers) {
96 if (architecture.canStoreValue(reg.getRegisterCategory(), kind)) {
97 list.add(reg);
98 }
99 }
100
101 Register[] ret = list.toArray(new Register[list.size()]);
102 return ret;
103 }
104
105 @Override
106 public RegisterAttributes[] getAttributesMap() {
107 return attributesMap.clone();
108 }
109
110 private final Register[] javaGeneralParameterRegisters;
111 private final Register[] nativeGeneralParameterRegisters;
112 private final Register[] xmmParameterRegisters = {xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7};
113
114 /*
115 * Some ABIs (e.g. Windows) require a so-called "home space", that is a save area on the stack
116 * to store the argument registers
117 */
118 private final boolean needsNativeStackHomeSpace;
119
120 private static Register[] initAllocatable(Architecture arch, boolean reserveForHeapBase) {
121 Register[] allRegisters = arch.getAvailableValueRegisters();
122 Register[] registers = new Register[allRegisters.length - (reserveForHeapBase ? 3 : 2)];
123
124 int idx = 0;
125 for (Register reg : allRegisters) {
126 if (reg.equals(rsp) || reg.equals(r15)) {
127 // skip stack pointer and thread register
128 continue;
129 }
130 if (reserveForHeapBase && reg.equals(r12)) {
131 // skip heap base register
132 continue;
133 }
134
135 registers[idx++] = reg;
136 }
137
138 assert idx == registers.length;
139 return registers;
140 }
141
142 public AMD64HotSpotRegisterConfig(Architecture architecture, HotSpotVMConfig config) {
143 this(architecture, config, initAllocatable(architecture, config.useCompressedOops));
144 assert callerSaved.length >= allocatable.length;
145 }
146
147 public AMD64HotSpotRegisterConfig(Architecture architecture, HotSpotVMConfig config, Register[] allocatable) {
148 this.architecture = architecture;
149 this.maxFrameSize = config.maxFrameSize;
150
151 if (config.windowsOs) {
152 javaGeneralParameterRegisters = new Register[]{rdx, r8, r9, rdi, rsi, rcx};
153 nativeGeneralParameterRegisters = new Register[]{rcx, rdx, r8, r9};
154 this.needsNativeStackHomeSpace = true;
155 } else {
156 javaGeneralParameterRegisters = new Register[]{rsi, rdx, rcx, r8, r9, rdi};
157 nativeGeneralParameterRegisters = new Register[]{rdi, rsi, rdx, rcx, r8, r9};
158 this.needsNativeStackHomeSpace = false;
159 }
160
161 this.allocatable = allocatable;
162 Set<Register> callerSaveSet = new HashSet<>();
163 Collections.addAll(callerSaveSet, allocatable);
164 Collections.addAll(callerSaveSet, xmmParameterRegisters);
165 Collections.addAll(callerSaveSet, javaGeneralParameterRegisters);
166 Collections.addAll(callerSaveSet, nativeGeneralParameterRegisters);
167 callerSaved = callerSaveSet.toArray(new Register[callerSaveSet.size()]);
168
169 allAllocatableAreCallerSaved = true;
170 attributesMap = RegisterAttributes.createMap(this, architecture.getRegisters());
171 }
172
173 @Override
174 public Register[] getCallerSaveRegisters() {
175 return callerSaved;
176 }
177
178 public Register[] getCalleeSaveRegisters() {
179 return null;
180 }
181
182 @Override
183 public boolean areAllAllocatableRegistersCallerSaved() {
184 return allAllocatableAreCallerSaved;
185 }
186
187 @Override
188 public Register getRegisterForRole(int index) {
189 throw new UnsupportedOperationException();
190 }
191
192 @Override
193 public CallingConvention getCallingConvention(Type type, JavaType returnType, JavaType[] parameterTypes, TargetDescription target, boolean stackOnly) {
194 if (type == Type.NativeCall) {
195 return callingConvention(nativeGeneralParameterRegisters, returnType, parameterTypes, type, target, stackOnly);
196 }
197 // On x64, parameter locations are the same whether viewed
198 // from the caller or callee perspective
199 return callingConvention(javaGeneralParameterRegisters, returnType, parameterTypes, type, target, stackOnly);
200 }
201
202 public Register[] getCallingConventionRegisters(Type type, JavaKind kind) {
203 switch (kind) {
204 case Boolean:
205 case Byte:
206 case Short:
207 case Char:
208 case Int:
209 case Long:
210 case Object:
211 return type == Type.NativeCall ? nativeGeneralParameterRegisters : javaGeneralParameterRegisters;
212 case Float:
213 case Double:
214 return xmmParameterRegisters;
215 default:
216 throw JVMCIError.shouldNotReachHere();
217 }
218 }
219
220 private CallingConvention callingConvention(Register[] generalParameterRegisters, JavaType returnType, JavaType[] parameterTypes, Type type, TargetDescription target, boolean stackOnly) {
221 AllocatableValue[] locations = new AllocatableValue[parameterTypes.length];
222
223 int currentGeneral = 0;
224 int currentXMM = 0;
225 int currentStackOffset = type == Type.NativeCall && needsNativeStackHomeSpace ? generalParameterRegisters.length * target.wordSize : 0;
226
227 for (int i = 0; i < parameterTypes.length; i++) {
228 final JavaKind kind = parameterTypes[i].getJavaKind().getStackKind();
229
230 switch (kind) {
231 case Byte:
232 case Boolean:
233 case Short:
234 case Char:
235 case Int:
236 case Long:
237 case Object:
238 if (!stackOnly && currentGeneral < generalParameterRegisters.length) {
239 Register register = generalParameterRegisters[currentGeneral++];
240 locations[i] = register.asValue(target.getLIRKind(kind));
241 }
242 break;
243 case Float:
244 case Double:
245 if (!stackOnly && currentXMM < xmmParameterRegisters.length) {
246 Register register = xmmParameterRegisters[currentXMM++];
247 locations[i] = register.asValue(target.getLIRKind(kind));
248 }
249 break;
250 default:
251 throw JVMCIError.shouldNotReachHere();
252 }
253
254 if (locations[i] == null) {
255 LIRKind lirKind = target.getLIRKind(kind);
256 locations[i] = StackSlot.get(lirKind, currentStackOffset, !type.out);
257 currentStackOffset += Math.max(lirKind.getPlatformKind().getSizeInBytes(), target.wordSize);
258 }
259 }
260
261 JavaKind returnKind = returnType == null ? JavaKind.Void : returnType.getJavaKind();
262 AllocatableValue returnLocation = returnKind == JavaKind.Void ? Value.ILLEGAL : getReturnRegister(returnKind).asValue(target.getLIRKind(returnKind.getStackKind()));
263 return new CallingConvention(currentStackOffset, returnLocation, locations);
264 }
265
266 @Override
267 public Register getReturnRegister(JavaKind kind) {
268 switch (kind) {
269 case Boolean:
270 case Byte:
271 case Char:
272 case Short:
273 case Int:
274 case Long:
275 case Object:
276 return rax;
277 case Float:
278 case Double:
279 return xmm0;
280 case Void:
281 case Illegal:
282 return null;
283 default:
284 throw new UnsupportedOperationException("no return register for type " + kind);
285 }
286 }
287
288 @Override
289 public Register getFrameRegister() {
290 return rsp;
291 }
292
293 @Override
294 public String toString() {
295 return String.format("Allocatable: " + Arrays.toString(getAllocatableRegisters()) + "%n" + "CallerSave: " + Arrays.toString(getCallerSaveRegisters()) + "%n");
296 }
297 }