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.*;
26
27 import java.util.*;
28
29 import jdk.vm.ci.amd64.*;
30 import jdk.vm.ci.code.*;
31 import jdk.vm.ci.code.CallingConvention.*;
32 import jdk.vm.ci.common.*;
33 import jdk.vm.ci.hotspot.*;
34 import jdk.vm.ci.meta.*;
35
36 public class AMD64HotSpotRegisterConfig implements RegisterConfig {
37
38 private final Architecture architecture;
39
40 private final Register[] allocatable;
41
42 private final int maxFrameSize;
43
44 /**
45 * The caller saved registers always include all parameter registers.
46 */
47 private final Register[] callerSaved;
48
49 private final boolean allAllocatableAreCallerSaved;
50
51 private final RegisterAttributes[] attributesMap;
52
53 public int getMaximumFrameSize() {
54 return maxFrameSize;
55 }
56
57 @Override
58 public Register[] getAllocatableRegisters() {
59 return allocatable.clone();
60 }
61
62 public Register[] filterAllocatableRegisters(PlatformKind kind, Register[] registers) {
63 ArrayList<Register> list = new ArrayList<>();
64 for (Register reg : registers) {
65 if (architecture.canStoreValue(reg.getRegisterCategory(), kind)) {
66 list.add(reg);
67 }
68 }
69
70 Register[] ret = list.toArray(new Register[list.size()]);
71 return ret;
72 }
73
74 @Override
75 public RegisterAttributes[] getAttributesMap() {
76 return attributesMap.clone();
77 }
78
79 private final Register[] javaGeneralParameterRegisters;
80 private final Register[] nativeGeneralParameterRegisters;
81 private final Register[] xmmParameterRegisters = {xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7};
82
83 /*
84 * Some ABIs (e.g. Windows) require a so-called "home space", that is a save area on the stack
85 * to store the argument registers
86 */
87 private final boolean needsNativeStackHomeSpace;
88
89 private static Register[] initAllocatable(boolean reserveForHeapBase) {
90 Register[] registers = null;
91 // @formatter:off
92 if (reserveForHeapBase) {
93 registers = new Register[] {
94 rax, rbx, rcx, rdx, /*rsp,*/ rbp, rsi, rdi, r8, r9, r10, r11, /*r12,*/ r13, r14, /*r15, */
95 xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7,
96 xmm8, xmm9, xmm10, xmm11, xmm12, xmm13, xmm14, xmm15
97 };
98 } else {
99 registers = new Register[] {
100 rax, rbx, rcx, rdx, /*rsp,*/ rbp, rsi, rdi, r8, r9, r10, r11, r12, r13, r14, /*r15, */
101 xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7,
102 xmm8, xmm9, xmm10, xmm11, xmm12, xmm13, xmm14, xmm15
103 };
104 }
105 // @formatter:on
106 return registers;
107 }
108
109 public AMD64HotSpotRegisterConfig(Architecture architecture, HotSpotVMConfig config) {
110 this(architecture, config, initAllocatable(config.useCompressedOops));
111 assert callerSaved.length >= allocatable.length;
112 }
113
114 public AMD64HotSpotRegisterConfig(Architecture architecture, HotSpotVMConfig config, Register[] allocatable) {
115 this.architecture = architecture;
116 this.maxFrameSize = config.maxFrameSize;
117
118 if (config.windowsOs) {
119 javaGeneralParameterRegisters = new Register[]{rdx, r8, r9, rdi, rsi, rcx};
120 nativeGeneralParameterRegisters = new Register[]{rcx, rdx, r8, r9};
121 this.needsNativeStackHomeSpace = true;
122 } else {
123 javaGeneralParameterRegisters = new Register[]{rsi, rdx, rcx, r8, r9, rdi};
124 nativeGeneralParameterRegisters = new Register[]{rdi, rsi, rdx, rcx, r8, r9};
125 this.needsNativeStackHomeSpace = false;
126 }
127
128 this.allocatable = allocatable.clone();
129 Set<Register> callerSaveSet = new HashSet<>();
130 Collections.addAll(callerSaveSet, allocatable);
131 Collections.addAll(callerSaveSet, xmmParameterRegisters);
132 Collections.addAll(callerSaveSet, javaGeneralParameterRegisters);
133 Collections.addAll(callerSaveSet, nativeGeneralParameterRegisters);
134 callerSaved = callerSaveSet.toArray(new Register[callerSaveSet.size()]);
135
136 allAllocatableAreCallerSaved = true;
137 attributesMap = RegisterAttributes.createMap(this, AMD64.allRegisters);
138 }
139
140 @Override
141 public Register[] getCallerSaveRegisters() {
142 return callerSaved;
143 }
144
145 public Register[] getCalleeSaveRegisters() {
146 return null;
147 }
148
149 @Override
150 public boolean areAllAllocatableRegistersCallerSaved() {
151 return allAllocatableAreCallerSaved;
152 }
153
154 @Override
155 public Register getRegisterForRole(int index) {
156 throw new UnsupportedOperationException();
157 }
158
159 @Override
160 public CallingConvention getCallingConvention(Type type, JavaType returnType, JavaType[] parameterTypes, TargetDescription target, boolean stackOnly) {
161 if (type == Type.NativeCall) {
162 return callingConvention(nativeGeneralParameterRegisters, returnType, parameterTypes, type, target, stackOnly);
163 }
164 // On x64, parameter locations are the same whether viewed
165 // from the caller or callee perspective
166 return callingConvention(javaGeneralParameterRegisters, returnType, parameterTypes, type, target, stackOnly);
167 }
168
169 public Register[] getCallingConventionRegisters(Type type, JavaKind kind) {
170 switch (kind) {
171 case Boolean:
172 case Byte:
173 case Short:
174 case Char:
175 case Int:
176 case Long:
177 case Object:
178 return type == Type.NativeCall ? nativeGeneralParameterRegisters : javaGeneralParameterRegisters;
179 case Float:
180 case Double:
181 return xmmParameterRegisters;
182 default:
183 throw JVMCIError.shouldNotReachHere();
184 }
185 }
186
187 private CallingConvention callingConvention(Register[] generalParameterRegisters, JavaType returnType, JavaType[] parameterTypes, Type type, TargetDescription target, boolean stackOnly) {
188 AllocatableValue[] locations = new AllocatableValue[parameterTypes.length];
189
190 int currentGeneral = 0;
191 int currentXMM = 0;
192 int currentStackOffset = type == Type.NativeCall && needsNativeStackHomeSpace ? generalParameterRegisters.length * target.wordSize : 0;
193
194 for (int i = 0; i < parameterTypes.length; i++) {
195 final JavaKind kind = parameterTypes[i].getJavaKind().getStackKind();
196
197 switch (kind) {
198 case Byte:
199 case Boolean:
200 case Short:
201 case Char:
202 case Int:
203 case Long:
204 case Object:
205 if (!stackOnly && currentGeneral < generalParameterRegisters.length) {
206 Register register = generalParameterRegisters[currentGeneral++];
207 locations[i] = register.asValue(target.getLIRKind(kind));
208 }
209 break;
210 case Float:
211 case Double:
212 if (!stackOnly && currentXMM < xmmParameterRegisters.length) {
213 Register register = xmmParameterRegisters[currentXMM++];
214 locations[i] = register.asValue(target.getLIRKind(kind));
215 }
216 break;
217 default:
218 throw JVMCIError.shouldNotReachHere();
219 }
220
221 if (locations[i] == null) {
222 LIRKind lirKind = target.getLIRKind(kind);
223 locations[i] = StackSlot.get(lirKind, currentStackOffset, !type.out);
224 currentStackOffset += Math.max(target.getSizeInBytes(lirKind.getPlatformKind()), target.wordSize);
225 }
226 }
227
228 JavaKind returnKind = returnType == null ? JavaKind.Void : returnType.getJavaKind();
229 AllocatableValue returnLocation = returnKind == JavaKind.Void ? Value.ILLEGAL : getReturnRegister(returnKind).asValue(target.getLIRKind(returnKind.getStackKind()));
230 return new CallingConvention(currentStackOffset, returnLocation, locations);
231 }
232
233 @Override
234 public Register getReturnRegister(JavaKind kind) {
235 switch (kind) {
236 case Boolean:
237 case Byte:
238 case Char:
239 case Short:
240 case Int:
241 case Long:
242 case Object:
243 return rax;
244 case Float:
245 case Double:
246 return xmm0;
247 case Void:
248 case Illegal:
249 return null;
250 default:
251 throw new UnsupportedOperationException("no return register for type " + kind);
252 }
253 }
254
255 @Override
256 public Register getFrameRegister() {
257 return rsp;
258 }
259
260 @Override
261 public String toString() {
262 return String.format("Allocatable: " + Arrays.toString(getAllocatableRegisters()) + "%n" + "CallerSave: " + Arrays.toString(getCallerSaveRegisters()) + "%n");
263 }
264 }