Mercurial > hg > graal-jvmci-8

annotate jvmci/jdk.vm.ci.hotspot.amd64/src/jdk/vm/ci/hotspot/amd64/AMD64HotSpotRegisterConfig.java @ 24225:a2dbb6fcc923

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Added tag jvmci-0.33 for changeset 3aed4cb813f4
author Doug Simon <doug.simon@oracle.com>
date Fri, 18 Aug 2017 22:47:33 +0200
parents fec2e64c06a8
children
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1 /*
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2 * Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package jdk.vm.ci.hotspot.amd64;
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24
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25 import static jdk.vm.ci.amd64.AMD64.r12;
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26 import static jdk.vm.ci.amd64.AMD64.r15;
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27 import static jdk.vm.ci.amd64.AMD64.r8;
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28 import static jdk.vm.ci.amd64.AMD64.r9;
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29 import static jdk.vm.ci.amd64.AMD64.rax;
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30 import static jdk.vm.ci.amd64.AMD64.rcx;
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31 import static jdk.vm.ci.amd64.AMD64.rdi;
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32 import static jdk.vm.ci.amd64.AMD64.rdx;
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33 import static jdk.vm.ci.amd64.AMD64.rsi;
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34 import static jdk.vm.ci.amd64.AMD64.rsp;
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35 import static jdk.vm.ci.amd64.AMD64.xmm0;
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36 import static jdk.vm.ci.amd64.AMD64.xmm1;
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37 import static jdk.vm.ci.amd64.AMD64.xmm2;
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38 import static jdk.vm.ci.amd64.AMD64.xmm3;
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39 import static jdk.vm.ci.amd64.AMD64.xmm4;
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40 import static jdk.vm.ci.amd64.AMD64.xmm5;
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41 import static jdk.vm.ci.amd64.AMD64.xmm6;
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42 import static jdk.vm.ci.amd64.AMD64.xmm7;
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43
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44 import java.util.ArrayList;
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45 import java.util.HashSet;
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46 import java.util.List;
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47 import java.util.Set;
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48
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49 import jdk.vm.ci.code.Architecture;
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50 import jdk.vm.ci.code.CallingConvention;
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51 import jdk.vm.ci.code.CallingConvention.Type;
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52 import jdk.vm.ci.code.Register;
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53 import jdk.vm.ci.code.RegisterArray;
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54 import jdk.vm.ci.code.RegisterAttributes;
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55 import jdk.vm.ci.code.RegisterConfig;
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56 import jdk.vm.ci.code.StackSlot;
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57 import jdk.vm.ci.code.TargetDescription;
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58 import jdk.vm.ci.code.ValueKindFactory;
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59 import jdk.vm.ci.common.JVMCIError;
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60 import jdk.vm.ci.hotspot.HotSpotCallingConventionType;
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61 import jdk.vm.ci.meta.AllocatableValue;
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62 import jdk.vm.ci.meta.JavaKind;
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63 import jdk.vm.ci.meta.JavaType;
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64 import jdk.vm.ci.meta.PlatformKind;
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65 import jdk.vm.ci.meta.Value;
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66 import jdk.vm.ci.meta.ValueKind;
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67
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68 public class AMD64HotSpotRegisterConfig implements RegisterConfig {
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69
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70 private final TargetDescription target;
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71
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72 private final RegisterArray allocatable;
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73
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74 /**
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75 * The caller saved registers always include all parameter registers.
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76 */
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77 private final RegisterArray callerSaved;
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78
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79 private final boolean allAllocatableAreCallerSaved;
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80
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81 private final RegisterAttributes[] attributesMap;
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82
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83 @Override
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84 public RegisterArray getAllocatableRegisters() {
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85 return allocatable;
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86 }
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87
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88 @Override
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89 public RegisterArray filterAllocatableRegisters(PlatformKind kind, RegisterArray registers) {
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90 ArrayList<Register> list = new ArrayList<>();
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91 for (Register reg : registers) {
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92 if (target.arch.canStoreValue(reg.getRegisterCategory(), kind)) {
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93 list.add(reg);
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94 }
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95 }
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96
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97 RegisterArray ret = new RegisterArray(list);
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98 return ret;
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99 }
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100
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101 @Override
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102 public RegisterAttributes[] getAttributesMap() {
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103 return attributesMap.clone();
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104 }
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105
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106 private final RegisterArray javaGeneralParameterRegisters;
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107 private final RegisterArray nativeGeneralParameterRegisters;
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108 private final RegisterArray javaXMMParameterRegisters;
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109 private final RegisterArray nativeXMMParameterRegisters;
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110 private final boolean windowsOS;
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111
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112 /*
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113 * Some ABIs (e.g. Windows) require a so-called "home space", that is a save area on the stack
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114 * to store the argument registers
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115 */
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116 private final boolean needsNativeStackHomeSpace;
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117
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118 private static final RegisterArray reservedRegisters = new RegisterArray(rsp, r15);
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119
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120 private static RegisterArray initAllocatable(Architecture arch, boolean reserveForHeapBase) {
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121 RegisterArray allRegisters = arch.getAvailableValueRegisters();
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diff changeset
122 Register[] registers = new Register[allRegisters.size() - reservedRegisters.size() - (reserveForHeapBase ? 1 : 0)];
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parents: 23679
diff changeset
123 List<Register> reservedRegistersList = reservedRegisters.asList();
22640
3abba3d4aef1 Register and PlatformKind declarations for AVX512.
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diff changeset
124
3abba3d4aef1 Register and PlatformKind declarations for AVX512.
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diff changeset
125 int idx = 0;
3abba3d4aef1 Register and PlatformKind declarations for AVX512.
Roland Schatz <roland.schatz@oracle.com>
parents: 22594
diff changeset
126 for (Register reg : allRegisters) {
22786
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twisti
parents: 22784
diff changeset
127 if (reservedRegistersList.contains(reg)) {
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parents: 22784
diff changeset
128 // skip reserved registers
22640
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diff changeset
129 continue;
3abba3d4aef1 Register and PlatformKind declarations for AVX512.
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parents: 22594
diff changeset
130 }
22641
461dc858dc61 Fix confused heap base and thread register.
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parents: 22640
diff changeset
131 if (reserveForHeapBase && reg.equals(r12)) {
22640
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diff changeset
132 // skip heap base register
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diff changeset
133 continue;
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parents: 22594
diff changeset
134 }
3abba3d4aef1 Register and PlatformKind declarations for AVX512.
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diff changeset
135
3abba3d4aef1 Register and PlatformKind declarations for AVX512.
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diff changeset
136 registers[idx++] = reg;
9886
d14b65dac937 Reserve r12 for heap base address when compressed oops are enabled
Christos Kotselidis <christos.kotselidis@oracle.com>
parents: 9717
diff changeset
137 }
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diff changeset
138
3abba3d4aef1 Register and PlatformKind declarations for AVX512.
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diff changeset
139 assert idx == registers.length;
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diff changeset
140 return new RegisterArray(registers);
8222
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Roland Schatz <roland.schatz@oracle.com>
parents: 8140
diff changeset
141 }
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parents: 8140
diff changeset
142
23679
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Doug Simon <doug.simon@oracle.com>
parents: 23674
diff changeset
143 public AMD64HotSpotRegisterConfig(TargetDescription target, boolean useCompressedOops, boolean windowsOs) {
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diff changeset
144 this(target, initAllocatable(target.arch, useCompressedOops), windowsOs);
23700
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diff changeset
145 assert callerSaved.size() >= allocatable.size();
15011
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Lukas Stadler <lukas.stadler@oracle.com>
parents: 14989
diff changeset
146 }
c8e575742f36 allow compilation with custom RegisterConfig
Lukas Stadler <lukas.stadler@oracle.com>
parents: 14989
diff changeset
147
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diff changeset
148 public AMD64HotSpotRegisterConfig(TargetDescription target, RegisterArray allocatable, boolean windowsOS) {
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diff changeset
149 this.target = target;
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diff changeset
150 this.windowsOS = windowsOS;
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parents: 9423
diff changeset
151
23729
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diff changeset
152 if (windowsOS) {
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diff changeset
153 javaGeneralParameterRegisters = new RegisterArray(rdx, r8, r9, rdi, rsi, rcx);
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diff changeset
154 nativeGeneralParameterRegisters = new RegisterArray(rcx, rdx, r8, r9);
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diff changeset
155 nativeXMMParameterRegisters = new RegisterArray(xmm0, xmm1, xmm2, xmm3);
18598
d806707624bb amd64 register config: reserve "home space" on windows in frame.
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parents: 18355
diff changeset
156 this.needsNativeStackHomeSpace = true;
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parents:
diff changeset
157 } else {
23700
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diff changeset
158 javaGeneralParameterRegisters = new RegisterArray(rsi, rdx, rcx, r8, r9, rdi);
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parents: 23679
diff changeset
159 nativeGeneralParameterRegisters = new RegisterArray(rdi, rsi, rdx, rcx, r8, r9);
23729
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diff changeset
160 nativeXMMParameterRegisters = new RegisterArray(xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7);
18598
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Bernhard Urban <bernhard.urban@jku.at>
parents: 18355
diff changeset
161 this.needsNativeStackHomeSpace = false;
3733
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
162 }
23729
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parents: 23700
diff changeset
163 javaXMMParameterRegisters = new RegisterArray(xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7);
3733
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parents:
diff changeset
164
22659
39f1499686ea Remove unnecessary array clone.
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parents: 22641
diff changeset
165 this.allocatable = allocatable;
13343
5dd9670009df fixed: parameter registers missing from caller saved set if excluded with the RegisterPressure option
Erik Eckstein <erik.eckstein@oracle.com>
parents: 9896
diff changeset
166 Set<Register> callerSaveSet = new HashSet<>();
23700
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parents: 23679
diff changeset
167 allocatable.addTo(callerSaveSet);
23729
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parents: 23700
diff changeset
168 javaXMMParameterRegisters.addTo(callerSaveSet);
23700
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parents: 23679
diff changeset
169 callerSaveSet.addAll(javaGeneralParameterRegisters.asList());
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parents: 23679
diff changeset
170 nativeGeneralParameterRegisters.addTo(callerSaveSet);
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parents: 23679
diff changeset
171 callerSaved = new RegisterArray(callerSaveSet);
13343
5dd9670009df fixed: parameter registers missing from caller saved set if excluded with the RegisterPressure option
Erik Eckstein <erik.eckstein@oracle.com>
parents: 9896
diff changeset
172
14614
abf7cf57df5e added RegisterConfig.areAllAllocatableRegistersCallerSaved()
Doug Simon <doug.simon@oracle.com>
parents: 14560
diff changeset
173 allAllocatableAreCallerSaved = true;
23396
9ed5b586018b Replace LIRKind with abstract base class (JDK-8156942).
Roland Schatz <roland.schatz@oracle.com>
parents: 23393
diff changeset
174 attributesMap = RegisterAttributes.createMap(this, target.arch.getRegisters());
3733
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parents:
diff changeset
175 }
e233f5660da4 Added Java files from Maxine project.
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parents:
diff changeset
176
e233f5660da4 Added Java files from Maxine project.
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parents:
diff changeset
177 @Override
23700
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parents: 23679
diff changeset
178 public RegisterArray getCallerSaveRegisters() {
13343
5dd9670009df fixed: parameter registers missing from caller saved set if excluded with the RegisterPressure option
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parents: 9896
diff changeset
179 return callerSaved;
3733
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
180 }
e233f5660da4 Added Java files from Maxine project.
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parents:
diff changeset
181
22784
0ab4d816a7f0 Always check the type of CallingConvention.Type
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parents: 22783
diff changeset
182 @Override
23700
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parents: 23679
diff changeset
183 public RegisterArray getCalleeSaveRegisters() {
22431
0a0c0111ecda Remove unused class CalleeSaveLayout.
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parents: 22054
diff changeset
184 return null;
0a0c0111ecda Remove unused class CalleeSaveLayout.
Roland Schatz <roland.schatz@oracle.com>
parents: 22054
diff changeset
185 }
0a0c0111ecda Remove unused class CalleeSaveLayout.
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parents: 22054
diff changeset
186
3733
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parents:
diff changeset
187 @Override
14614
abf7cf57df5e added RegisterConfig.areAllAllocatableRegistersCallerSaved()
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parents: 14560
diff changeset
188 public boolean areAllAllocatableRegistersCallerSaved() {
abf7cf57df5e added RegisterConfig.areAllAllocatableRegistersCallerSaved()
Doug Simon <doug.simon@oracle.com>
parents: 14560
diff changeset
189 return allAllocatableAreCallerSaved;
abf7cf57df5e added RegisterConfig.areAllAllocatableRegistersCallerSaved()
Doug Simon <doug.simon@oracle.com>
parents: 14560
diff changeset
190 }
abf7cf57df5e added RegisterConfig.areAllAllocatableRegistersCallerSaved()
Doug Simon <doug.simon@oracle.com>
parents: 14560
diff changeset
191
abf7cf57df5e added RegisterConfig.areAllAllocatableRegistersCallerSaved()
Doug Simon <doug.simon@oracle.com>
parents: 14560
diff changeset
192 @Override
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parents: 23393
diff changeset
193 public CallingConvention getCallingConvention(Type type, JavaType returnType, JavaType[] parameterTypes, ValueKindFactory<?> valueKindFactory) {
22784
0ab4d816a7f0 Always check the type of CallingConvention.Type
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 22783
diff changeset
194 HotSpotCallingConventionType hotspotType = (HotSpotCallingConventionType) type;
22783
d63506bb5237 Make CallingConvention.Type extensible; remove unused stackOnly parameter
Christian Wimmer <christian.wimmer@oracle.com>
parents: 22672
diff changeset
195 if (type == HotSpotCallingConventionType.NativeCall) {
23729
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parents: 23700
diff changeset
196 return callingConvention(nativeGeneralParameterRegisters, nativeXMMParameterRegisters, windowsOS, returnType, parameterTypes, hotspotType, valueKindFactory);
3733
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
197 }
9717
f8e0bf2c70e2 consolidated the two RegisterConfig instances for HotSpotRuntime into one
Doug Simon <doug.simon@oracle.com>
parents: 9693
diff changeset
198 // On x64, parameter locations are the same whether viewed
f8e0bf2c70e2 consolidated the two RegisterConfig instances for HotSpotRuntime into one
Doug Simon <doug.simon@oracle.com>
parents: 9693
diff changeset
199 // from the caller or callee perspective
23729
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diff changeset
200 return callingConvention(javaGeneralParameterRegisters, javaXMMParameterRegisters, false, returnType, parameterTypes, hotspotType, valueKindFactory);
3733
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parents:
diff changeset
201 }
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parents:
diff changeset
202
22784
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parents: 22783
diff changeset
203 @Override
23700
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parents: 23679
diff changeset
204 public RegisterArray getCallingConventionRegisters(Type type, JavaKind kind) {
22784
0ab4d816a7f0 Always check the type of CallingConvention.Type
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parents: 22783
diff changeset
205 HotSpotCallingConventionType hotspotType = (HotSpotCallingConventionType) type;
22533
df053711614b Remove Value.getKind().
Roland Schatz <roland.schatz@oracle.com>
parents: 22431
diff changeset
206 switch (kind) {
df053711614b Remove Value.getKind().
Roland Schatz <roland.schatz@oracle.com>
parents: 22431
diff changeset
207 case Boolean:
df053711614b Remove Value.getKind().
Roland Schatz <roland.schatz@oracle.com>
parents: 22431
diff changeset
208 case Byte:
df053711614b Remove Value.getKind().
Roland Schatz <roland.schatz@oracle.com>
parents: 22431
diff changeset
209 case Short:
df053711614b Remove Value.getKind().
Roland Schatz <roland.schatz@oracle.com>
parents: 22431
diff changeset
210 case Char:
df053711614b Remove Value.getKind().
Roland Schatz <roland.schatz@oracle.com>
parents: 22431
diff changeset
211 case Int:
df053711614b Remove Value.getKind().
Roland Schatz <roland.schatz@oracle.com>
parents: 22431
diff changeset
212 case Long:
df053711614b Remove Value.getKind().
Roland Schatz <roland.schatz@oracle.com>
parents: 22431
diff changeset
213 case Object:
22784
0ab4d816a7f0 Always check the type of CallingConvention.Type
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 22783
diff changeset
214 return hotspotType == HotSpotCallingConventionType.NativeCall ? nativeGeneralParameterRegisters : javaGeneralParameterRegisters;
22533
df053711614b Remove Value.getKind().
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parents: 22431
diff changeset
215 case Float:
df053711614b Remove Value.getKind().
Roland Schatz <roland.schatz@oracle.com>
parents: 22431
diff changeset
216 case Double:
23729
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parents: 23700
diff changeset
217 return hotspotType == HotSpotCallingConventionType.NativeCall ? nativeXMMParameterRegisters : javaXMMParameterRegisters;
22533
df053711614b Remove Value.getKind().
Roland Schatz <roland.schatz@oracle.com>
parents: 22431
diff changeset
218 default:
23392
b3a816d3b844 Backed out changeset: a920338dd4d4
Doug Simon <doug.simon@oracle.com>
parents: 23387
diff changeset
219 throw JVMCIError.shouldNotReachHere();
6521
2a0c9f20baa1 consolidated framework for runtime and stub calls and moved declaration of descriptors for such calls to the source file in which they are used
Doug Simon <doug.simon@oracle.com>
parents: 6495
diff changeset
220 }
22533
df053711614b Remove Value.getKind().
Roland Schatz <roland.schatz@oracle.com>
parents: 22431
diff changeset
221 }
df053711614b Remove Value.getKind().
Roland Schatz <roland.schatz@oracle.com>
parents: 22431
diff changeset
222
23729
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Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23700
diff changeset
223 /**
fec2e64c06a8 8161292: [JVMCI] missing test files from 8159368 (incorrect native calling convention for windows)
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parents: 23700
diff changeset
224 * Hand out registers matching the calling convention from the {@code generalParameterRegisters}
fec2e64c06a8 8161292: [JVMCI] missing test files from 8159368 (incorrect native calling convention for windows)
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23700
diff changeset
225 * and {@code xmmParameterRegisters} sets. Normally registers are handed out from each set
fec2e64c06a8 8161292: [JVMCI] missing test files from 8159368 (incorrect native calling convention for windows)
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23700
diff changeset
226 * individually based on the type of the argument. If the {@code unified} flag is true then hand
fec2e64c06a8 8161292: [JVMCI] missing test files from 8159368 (incorrect native calling convention for windows)
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23700
diff changeset
227 * out registers in a single sequence, selecting between the sets based on the type. This is to
fec2e64c06a8 8161292: [JVMCI] missing test files from 8159368 (incorrect native calling convention for windows)
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parents: 23700
diff changeset
228 * support the Windows calling convention which only ever passes 4 arguments in registers, no
fec2e64c06a8 8161292: [JVMCI] missing test files from 8159368 (incorrect native calling convention for windows)
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parents: 23700
diff changeset
229 * matter their types.
fec2e64c06a8 8161292: [JVMCI] missing test files from 8159368 (incorrect native calling convention for windows)
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23700
diff changeset
230 *
fec2e64c06a8 8161292: [JVMCI] missing test files from 8159368 (incorrect native calling convention for windows)
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23700
diff changeset
231 * @param generalParameterRegisters
fec2e64c06a8 8161292: [JVMCI] missing test files from 8159368 (incorrect native calling convention for windows)
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23700
diff changeset
232 * @param xmmParameterRegisters
fec2e64c06a8 8161292: [JVMCI] missing test files from 8159368 (incorrect native calling convention for windows)
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23700
diff changeset
233 * @param unified
fec2e64c06a8 8161292: [JVMCI] missing test files from 8159368 (incorrect native calling convention for windows)
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parents: 23700
diff changeset
234 * @param returnType
fec2e64c06a8 8161292: [JVMCI] missing test files from 8159368 (incorrect native calling convention for windows)
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23700
diff changeset
235 * @param parameterTypes
fec2e64c06a8 8161292: [JVMCI] missing test files from 8159368 (incorrect native calling convention for windows)
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parents: 23700
diff changeset
236 * @param type
fec2e64c06a8 8161292: [JVMCI] missing test files from 8159368 (incorrect native calling convention for windows)
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23700
diff changeset
237 * @param valueKindFactory
fec2e64c06a8 8161292: [JVMCI] missing test files from 8159368 (incorrect native calling convention for windows)
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23700
diff changeset
238 * @return the resulting calling convention
fec2e64c06a8 8161292: [JVMCI] missing test files from 8159368 (incorrect native calling convention for windows)
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23700
diff changeset
239 */
fec2e64c06a8 8161292: [JVMCI] missing test files from 8159368 (incorrect native calling convention for windows)
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23700
diff changeset
240 private CallingConvention callingConvention(RegisterArray generalParameterRegisters, RegisterArray xmmParameterRegisters, boolean unified, JavaType returnType, JavaType[] parameterTypes,
fec2e64c06a8 8161292: [JVMCI] missing test files from 8159368 (incorrect native calling convention for windows)
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23700
diff changeset
241 HotSpotCallingConventionType type,
23396
9ed5b586018b Replace LIRKind with abstract base class (JDK-8156942).
Roland Schatz <roland.schatz@oracle.com>
parents: 23393
diff changeset
242 ValueKindFactory<?> valueKindFactory) {
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243 assert !unified || generalParameterRegisters.size() == xmmParameterRegisters.size() : "must be same size in unified mode";
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244 AllocatableValue[] locations = new AllocatableValue[parameterTypes.length];
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245
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246 int currentGeneral = 0;
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247 int currentXMM = 0;
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248 int currentStackOffset = type == HotSpotCallingConventionType.NativeCall && needsNativeStackHomeSpace ? generalParameterRegisters.size() * target.wordSize : 0;
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249
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250 for (int i = 0; i < parameterTypes.length; i++) {
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251 final JavaKind kind = parameterTypes[i].getJavaKind().getStackKind();
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252
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253 switch (kind) {
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254 case Byte:
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255 case Boolean:
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256 case Short:
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257 case Char:
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258 case Int:
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259 case Long:
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260 case Object:
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261 if (currentGeneral < generalParameterRegisters.size()) {
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262 Register register = generalParameterRegisters.get(currentGeneral++);
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263 locations[i] = register.asValue(valueKindFactory.getValueKind(kind));
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264 }
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265 break;
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266 case Float:
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267 case Double:
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268 if ((unified ? currentGeneral : currentXMM) < xmmParameterRegisters.size()) {
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269 Register register = xmmParameterRegisters.get(unified ? currentGeneral++ : currentXMM++);
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270 locations[i] = register.asValue(valueKindFactory.getValueKind(kind));
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271 }
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272 break;
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273 default:
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274 throw JVMCIError.shouldNotReachHere();
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275 }
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276
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277 if (locations[i] == null) {
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278 ValueKind<?> valueKind = valueKindFactory.getValueKind(kind);
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279 locations[i] = StackSlot.get(valueKind, currentStackOffset, !type.out);
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280 currentStackOffset += Math.max(valueKind.getPlatformKind().getSizeInBytes(), target.wordSize);
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281 }
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282 }
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283 assert !unified || currentXMM == 0 : "shouldn't be used in unified mode";
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284
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285 JavaKind returnKind = returnType == null ? JavaKind.Void : returnType.getJavaKind();
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286 AllocatableValue returnLocation = returnKind == JavaKind.Void ? Value.ILLEGAL : getReturnRegister(returnKind).asValue(valueKindFactory.getValueKind(returnKind.getStackKind()));
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287 return new CallingConvention(currentStackOffset, returnLocation, locations);
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288 }
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289
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290 @Override
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291 public Register getReturnRegister(JavaKind kind) {
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292 switch (kind) {
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293 case Boolean:
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294 case Byte:
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295 case Char:
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296 case Short:
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297 case Int:
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298 case Long:
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299 case Object:
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300 return rax;
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301 case Float:
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302 case Double:
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303 return xmm0;
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304 case Void:
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305 case Illegal:
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306 return null;
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307 default:
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308 throw new UnsupportedOperationException("no return register for type " + kind);
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309 }
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310 }
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311
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312 @Override
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313 public Register getFrameRegister() {
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314 return rsp;
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315 }
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316
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317 @Override
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318 public String toString() {
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319 return String.format("Allocatable: " + getAllocatableRegisters() + "%n" + "CallerSave: " + getCallerSaveRegisters() + "%n");
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320 }
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321 }