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/MCInstrInfo.h"
14 #include "llvm/MC/MCRegisterInfo.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
79 const unsigned SystemZMC::VR32Regs[32] = {
80 SystemZ::F0S, SystemZ::F1S, SystemZ::F2S, SystemZ::F3S,
81 SystemZ::F4S, SystemZ::F5S, SystemZ::F6S, SystemZ::F7S,
82 SystemZ::F8S, SystemZ::F9S, SystemZ::F10S, SystemZ::F11S,
83 SystemZ::F12S, SystemZ::F13S, SystemZ::F14S, SystemZ::F15S,
84 SystemZ::F16S, SystemZ::F17S, SystemZ::F18S, SystemZ::F19S,
85 SystemZ::F20S, SystemZ::F21S, SystemZ::F22S, SystemZ::F23S,
86 SystemZ::F24S, SystemZ::F25S, SystemZ::F26S, SystemZ::F27S,
87 SystemZ::F28S, SystemZ::F29S, SystemZ::F30S, SystemZ::F31S
88 };
89
90 const unsigned SystemZMC::VR64Regs[32] = {
91 SystemZ::F0D, SystemZ::F1D, SystemZ::F2D, SystemZ::F3D,
92 SystemZ::F4D, SystemZ::F5D, SystemZ::F6D, SystemZ::F7D,
93 SystemZ::F8D, SystemZ::F9D, SystemZ::F10D, SystemZ::F11D,
94 SystemZ::F12D, SystemZ::F13D, SystemZ::F14D, SystemZ::F15D,
95 SystemZ::F16D, SystemZ::F17D, SystemZ::F18D, SystemZ::F19D,
96 SystemZ::F20D, SystemZ::F21D, SystemZ::F22D, SystemZ::F23D,
97 SystemZ::F24D, SystemZ::F25D, SystemZ::F26D, SystemZ::F27D,
98 SystemZ::F28D, SystemZ::F29D, SystemZ::F30D, SystemZ::F31D
99 };
100
101 const unsigned SystemZMC::VR128Regs[32] = {
102 SystemZ::V0, SystemZ::V1, SystemZ::V2, SystemZ::V3,
103 SystemZ::V4, SystemZ::V5, SystemZ::V6, SystemZ::V7,
104 SystemZ::V8, SystemZ::V9, SystemZ::V10, SystemZ::V11,
105 SystemZ::V12, SystemZ::V13, SystemZ::V14, SystemZ::V15,
106 SystemZ::V16, SystemZ::V17, SystemZ::V18, SystemZ::V19,
107 SystemZ::V20, SystemZ::V21, SystemZ::V22, SystemZ::V23,
108 SystemZ::V24, SystemZ::V25, SystemZ::V26, SystemZ::V27,
109 SystemZ::V28, SystemZ::V29, SystemZ::V30, SystemZ::V31
110 };
111
getFirstReg(unsigned Reg)112 unsigned SystemZMC::getFirstReg(unsigned Reg) {
113 static unsigned Map[SystemZ::NUM_TARGET_REGS];
114 static bool Initialized = false;
115 if (!Initialized) {
116 for (unsigned I = 0; I < 16; ++I) {
117 Map[GR32Regs[I]] = I;
118 Map[GRH32Regs[I]] = I;
119 Map[GR64Regs[I]] = I;
120 Map[GR128Regs[I]] = I;
121 Map[FP128Regs[I]] = I;
122 }
123 for (unsigned I = 0; I < 32; ++I) {
124 Map[VR32Regs[I]] = I;
125 Map[VR64Regs[I]] = I;
126 Map[VR128Regs[I]] = I;
127 }
128 }
129 assert(Reg < SystemZ::NUM_TARGET_REGS);
130 return Map[Reg];
131 }
132
createSystemZMCAsmInfo(const MCRegisterInfo & MRI,const Triple & TT)133 static MCAsmInfo *createSystemZMCAsmInfo(const MCRegisterInfo &MRI,
134 const Triple &TT) {
135 MCAsmInfo *MAI = new SystemZMCAsmInfo(TT);
136 MCCFIInstruction Inst =
137 MCCFIInstruction::createDefCfa(nullptr,
138 MRI.getDwarfRegNum(SystemZ::R15D, true),
139 SystemZMC::CFAOffsetFromInitialSP);
140 MAI->addInitialFrameState(Inst);
141 return MAI;
142 }
143
createSystemZMCInstrInfo()144 static MCInstrInfo *createSystemZMCInstrInfo() {
145 MCInstrInfo *X = new MCInstrInfo();
146 InitSystemZMCInstrInfo(X);
147 return X;
148 }
149
createSystemZMCRegisterInfo(const Triple & TT)150 static MCRegisterInfo *createSystemZMCRegisterInfo(const Triple &TT) {
151 MCRegisterInfo *X = new MCRegisterInfo();
152 InitSystemZMCRegisterInfo(X, SystemZ::R14D);
153 return X;
154 }
155
156 static MCSubtargetInfo *
createSystemZMCSubtargetInfo(const Triple & TT,StringRef CPU,StringRef FS)157 createSystemZMCSubtargetInfo(const Triple &TT, StringRef CPU, StringRef FS) {
158 return createSystemZMCSubtargetInfoImpl(TT, CPU, FS);
159 }
160
adjustCodeGenOpts(const Triple & TT,Reloc::Model RM,CodeModel::Model & CM)161 static void adjustCodeGenOpts(const Triple &TT, Reloc::Model RM,
162 CodeModel::Model &CM) {
163 // For SystemZ we define the models as follows:
164 //
165 // Small: BRASL can call any function and will use a stub if necessary.
166 // Locally-binding symbols will always be in range of LARL.
167 //
168 // Medium: BRASL can call any function and will use a stub if necessary.
169 // GOT slots and locally-defined text will always be in range
170 // of LARL, but other symbols might not be.
171 //
172 // Large: Equivalent to Medium for now.
173 //
174 // Kernel: Equivalent to Medium for now.
175 //
176 // This means that any PIC module smaller than 4GB meets the
177 // requirements of Small, so Small seems like the best default there.
178 //
179 // All symbols bind locally in a non-PIC module, so the choice is less
180 // obvious. There are two cases:
181 //
182 // - When creating an executable, PLTs and copy relocations allow
183 // us to treat external symbols as part of the executable.
184 // Any executable smaller than 4GB meets the requirements of Small,
185 // so that seems like the best default.
186 //
187 // - When creating JIT code, stubs will be in range of BRASL if the
188 // image is less than 4GB in size. GOT entries will likewise be
189 // in range of LARL. However, the JIT environment has no equivalent
190 // of copy relocs, so locally-binding data symbols might not be in
191 // the range of LARL. We need the Medium model in that case.
192 if (CM == CodeModel::Default)
193 CM = CodeModel::Small;
194 else if (CM == CodeModel::JITDefault)
195 CM = RM == Reloc::PIC_ ? CodeModel::Small : CodeModel::Medium;
196 }
197
createSystemZMCInstPrinter(const Triple & T,unsigned SyntaxVariant,const MCAsmInfo & MAI,const MCInstrInfo & MII,const MCRegisterInfo & MRI)198 static MCInstPrinter *createSystemZMCInstPrinter(const Triple &T,
199 unsigned SyntaxVariant,
200 const MCAsmInfo &MAI,
201 const MCInstrInfo &MII,
202 const MCRegisterInfo &MRI) {
203 return new SystemZInstPrinter(MAI, MII, MRI);
204 }
205
LLVMInitializeSystemZTargetMC()206 extern "C" void LLVMInitializeSystemZTargetMC() {
207 // Register the MCAsmInfo.
208 TargetRegistry::RegisterMCAsmInfo(TheSystemZTarget,
209 createSystemZMCAsmInfo);
210
211 // Register the adjustCodeGenOpts.
212 TargetRegistry::registerMCAdjustCodeGenOpts(TheSystemZTarget,
213 adjustCodeGenOpts);
214
215 // Register the MCCodeEmitter.
216 TargetRegistry::RegisterMCCodeEmitter(TheSystemZTarget,
217 createSystemZMCCodeEmitter);
218
219 // Register the MCInstrInfo.
220 TargetRegistry::RegisterMCInstrInfo(TheSystemZTarget,
221 createSystemZMCInstrInfo);
222
223 // Register the MCRegisterInfo.
224 TargetRegistry::RegisterMCRegInfo(TheSystemZTarget,
225 createSystemZMCRegisterInfo);
226
227 // Register the MCSubtargetInfo.
228 TargetRegistry::RegisterMCSubtargetInfo(TheSystemZTarget,
229 createSystemZMCSubtargetInfo);
230
231 // Register the MCAsmBackend.
232 TargetRegistry::RegisterMCAsmBackend(TheSystemZTarget,
233 createSystemZMCAsmBackend);
234
235 // Register the MCInstPrinter.
236 TargetRegistry::RegisterMCInstPrinter(TheSystemZTarget,
237 createSystemZMCInstPrinter);
238 }
239