1 //===-- SystemZMCTargetDesc.cpp - SystemZ target descriptions -------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "SystemZMCTargetDesc.h"
11 #include "InstPrinter/SystemZInstPrinter.h"
12 #include "SystemZMCAsmInfo.h"
13 #include "llvm/MC/MCCodeGenInfo.h"
14 #include "llvm/MC/MCInstrInfo.h"
15 #include "llvm/MC/MCStreamer.h"
16 #include "llvm/MC/MCSubtargetInfo.h"
17 #include "llvm/Support/TargetRegistry.h"
18
19 using namespace llvm;
20
21 #define GET_INSTRINFO_MC_DESC
22 #include "SystemZGenInstrInfo.inc"
23
24 #define GET_SUBTARGETINFO_MC_DESC
25 #include "SystemZGenSubtargetInfo.inc"
26
27 #define GET_REGINFO_MC_DESC
28 #include "SystemZGenRegisterInfo.inc"
29
30 const unsigned SystemZMC::GR32Regs[16] = {
31 SystemZ::R0L, SystemZ::R1L, SystemZ::R2L, SystemZ::R3L,
32 SystemZ::R4L, SystemZ::R5L, SystemZ::R6L, SystemZ::R7L,
33 SystemZ::R8L, SystemZ::R9L, SystemZ::R10L, SystemZ::R11L,
34 SystemZ::R12L, SystemZ::R13L, SystemZ::R14L, SystemZ::R15L
35 };
36
37 const unsigned SystemZMC::GRH32Regs[16] = {
38 SystemZ::R0H, SystemZ::R1H, SystemZ::R2H, SystemZ::R3H,
39 SystemZ::R4H, SystemZ::R5H, SystemZ::R6H, SystemZ::R7H,
40 SystemZ::R8H, SystemZ::R9H, SystemZ::R10H, SystemZ::R11H,
41 SystemZ::R12H, SystemZ::R13H, SystemZ::R14H, SystemZ::R15H
42 };
43
44 const unsigned SystemZMC::GR64Regs[16] = {
45 SystemZ::R0D, SystemZ::R1D, SystemZ::R2D, SystemZ::R3D,
46 SystemZ::R4D, SystemZ::R5D, SystemZ::R6D, SystemZ::R7D,
47 SystemZ::R8D, SystemZ::R9D, SystemZ::R10D, SystemZ::R11D,
48 SystemZ::R12D, SystemZ::R13D, SystemZ::R14D, SystemZ::R15D
49 };
50
51 const unsigned SystemZMC::GR128Regs[16] = {
52 SystemZ::R0Q, 0, SystemZ::R2Q, 0,
53 SystemZ::R4Q, 0, SystemZ::R6Q, 0,
54 SystemZ::R8Q, 0, SystemZ::R10Q, 0,
55 SystemZ::R12Q, 0, SystemZ::R14Q, 0
56 };
57
58 const unsigned SystemZMC::FP32Regs[16] = {
59 SystemZ::F0S, SystemZ::F1S, SystemZ::F2S, SystemZ::F3S,
60 SystemZ::F4S, SystemZ::F5S, SystemZ::F6S, SystemZ::F7S,
61 SystemZ::F8S, SystemZ::F9S, SystemZ::F10S, SystemZ::F11S,
62 SystemZ::F12S, SystemZ::F13S, SystemZ::F14S, SystemZ::F15S
63 };
64
65 const unsigned SystemZMC::FP64Regs[16] = {
66 SystemZ::F0D, SystemZ::F1D, SystemZ::F2D, SystemZ::F3D,
67 SystemZ::F4D, SystemZ::F5D, SystemZ::F6D, SystemZ::F7D,
68 SystemZ::F8D, SystemZ::F9D, SystemZ::F10D, SystemZ::F11D,
69 SystemZ::F12D, SystemZ::F13D, SystemZ::F14D, SystemZ::F15D
70 };
71
72 const unsigned SystemZMC::FP128Regs[16] = {
73 SystemZ::F0Q, SystemZ::F1Q, 0, 0,
74 SystemZ::F4Q, SystemZ::F5Q, 0, 0,
75 SystemZ::F8Q, SystemZ::F9Q, 0, 0,
76 SystemZ::F12Q, SystemZ::F13Q, 0, 0
77 };
78
getFirstReg(unsigned Reg)79 unsigned SystemZMC::getFirstReg(unsigned Reg) {
80 static unsigned Map[SystemZ::NUM_TARGET_REGS];
81 static bool Initialized = false;
82 if (!Initialized) {
83 for (unsigned I = 0; I < 16; ++I) {
84 Map[GR32Regs[I]] = I;
85 Map[GRH32Regs[I]] = I;
86 Map[GR64Regs[I]] = I;
87 Map[GR128Regs[I]] = I;
88 Map[FP32Regs[I]] = I;
89 Map[FP64Regs[I]] = I;
90 Map[FP128Regs[I]] = I;
91 }
92 }
93 assert(Reg < SystemZ::NUM_TARGET_REGS);
94 return Map[Reg];
95 }
96
createSystemZMCAsmInfo(const MCRegisterInfo & MRI,StringRef TT)97 static MCAsmInfo *createSystemZMCAsmInfo(const MCRegisterInfo &MRI,
98 StringRef TT) {
99 MCAsmInfo *MAI = new SystemZMCAsmInfo(TT);
100 MCCFIInstruction Inst =
101 MCCFIInstruction::createDefCfa(nullptr,
102 MRI.getDwarfRegNum(SystemZ::R15D, true),
103 SystemZMC::CFAOffsetFromInitialSP);
104 MAI->addInitialFrameState(Inst);
105 return MAI;
106 }
107
createSystemZMCInstrInfo()108 static MCInstrInfo *createSystemZMCInstrInfo() {
109 MCInstrInfo *X = new MCInstrInfo();
110 InitSystemZMCInstrInfo(X);
111 return X;
112 }
113
createSystemZMCRegisterInfo(StringRef TT)114 static MCRegisterInfo *createSystemZMCRegisterInfo(StringRef TT) {
115 MCRegisterInfo *X = new MCRegisterInfo();
116 InitSystemZMCRegisterInfo(X, SystemZ::R14D);
117 return X;
118 }
119
createSystemZMCSubtargetInfo(StringRef TT,StringRef CPU,StringRef FS)120 static MCSubtargetInfo *createSystemZMCSubtargetInfo(StringRef TT,
121 StringRef CPU,
122 StringRef FS) {
123 MCSubtargetInfo *X = new MCSubtargetInfo();
124 InitSystemZMCSubtargetInfo(X, TT, CPU, FS);
125 return X;
126 }
127
createSystemZMCCodeGenInfo(StringRef TT,Reloc::Model RM,CodeModel::Model CM,CodeGenOpt::Level OL)128 static MCCodeGenInfo *createSystemZMCCodeGenInfo(StringRef TT, Reloc::Model RM,
129 CodeModel::Model CM,
130 CodeGenOpt::Level OL) {
131 MCCodeGenInfo *X = new MCCodeGenInfo();
132
133 // Static code is suitable for use in a dynamic executable; there is no
134 // separate DynamicNoPIC model.
135 if (RM == Reloc::Default || RM == Reloc::DynamicNoPIC)
136 RM = Reloc::Static;
137
138 // For SystemZ we define the models as follows:
139 //
140 // Small: BRASL can call any function and will use a stub if necessary.
141 // Locally-binding symbols will always be in range of LARL.
142 //
143 // Medium: BRASL can call any function and will use a stub if necessary.
144 // GOT slots and locally-defined text will always be in range
145 // of LARL, but other symbols might not be.
146 //
147 // Large: Equivalent to Medium for now.
148 //
149 // Kernel: Equivalent to Medium for now.
150 //
151 // This means that any PIC module smaller than 4GB meets the
152 // requirements of Small, so Small seems like the best default there.
153 //
154 // All symbols bind locally in a non-PIC module, so the choice is less
155 // obvious. There are two cases:
156 //
157 // - When creating an executable, PLTs and copy relocations allow
158 // us to treat external symbols as part of the executable.
159 // Any executable smaller than 4GB meets the requirements of Small,
160 // so that seems like the best default.
161 //
162 // - When creating JIT code, stubs will be in range of BRASL if the
163 // image is less than 4GB in size. GOT entries will likewise be
164 // in range of LARL. However, the JIT environment has no equivalent
165 // of copy relocs, so locally-binding data symbols might not be in
166 // the range of LARL. We need the Medium model in that case.
167 if (CM == CodeModel::Default)
168 CM = CodeModel::Small;
169 else if (CM == CodeModel::JITDefault)
170 CM = RM == Reloc::PIC_ ? CodeModel::Small : CodeModel::Medium;
171 X->InitMCCodeGenInfo(RM, CM, OL);
172 return X;
173 }
174
createSystemZMCInstPrinter(const Triple & T,unsigned SyntaxVariant,const MCAsmInfo & MAI,const MCInstrInfo & MII,const MCRegisterInfo & MRI)175 static MCInstPrinter *createSystemZMCInstPrinter(const Triple &T,
176 unsigned SyntaxVariant,
177 const MCAsmInfo &MAI,
178 const MCInstrInfo &MII,
179 const MCRegisterInfo &MRI) {
180 return new SystemZInstPrinter(MAI, MII, MRI);
181 }
182
LLVMInitializeSystemZTargetMC()183 extern "C" void LLVMInitializeSystemZTargetMC() {
184 // Register the MCAsmInfo.
185 TargetRegistry::RegisterMCAsmInfo(TheSystemZTarget,
186 createSystemZMCAsmInfo);
187
188 // Register the MCCodeGenInfo.
189 TargetRegistry::RegisterMCCodeGenInfo(TheSystemZTarget,
190 createSystemZMCCodeGenInfo);
191
192 // Register the MCCodeEmitter.
193 TargetRegistry::RegisterMCCodeEmitter(TheSystemZTarget,
194 createSystemZMCCodeEmitter);
195
196 // Register the MCInstrInfo.
197 TargetRegistry::RegisterMCInstrInfo(TheSystemZTarget,
198 createSystemZMCInstrInfo);
199
200 // Register the MCRegisterInfo.
201 TargetRegistry::RegisterMCRegInfo(TheSystemZTarget,
202 createSystemZMCRegisterInfo);
203
204 // Register the MCSubtargetInfo.
205 TargetRegistry::RegisterMCSubtargetInfo(TheSystemZTarget,
206 createSystemZMCSubtargetInfo);
207
208 // Register the MCAsmBackend.
209 TargetRegistry::RegisterMCAsmBackend(TheSystemZTarget,
210 createSystemZMCAsmBackend);
211
212 // Register the MCInstPrinter.
213 TargetRegistry::RegisterMCInstPrinter(TheSystemZTarget,
214 createSystemZMCInstPrinter);
215 }
216