1 //===-- XCoreMCTargetDesc.cpp - XCore 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 // This file provides XCore specific target descriptions.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "XCoreMCTargetDesc.h"
15 #include "InstPrinter/XCoreInstPrinter.h"
16 #include "XCoreMCAsmInfo.h"
17 #include "XCoreTargetStreamer.h"
18 #include "llvm/MC/MCCodeGenInfo.h"
19 #include "llvm/MC/MCInstrInfo.h"
20 #include "llvm/MC/MCRegisterInfo.h"
21 #include "llvm/MC/MCSubtargetInfo.h"
22 #include "llvm/Support/ErrorHandling.h"
23 #include "llvm/Support/FormattedStream.h"
24 #include "llvm/Support/TargetRegistry.h"
25 
26 using namespace llvm;
27 
28 #define GET_INSTRINFO_MC_DESC
29 #include "XCoreGenInstrInfo.inc"
30 
31 #define GET_SUBTARGETINFO_MC_DESC
32 #include "XCoreGenSubtargetInfo.inc"
33 
34 #define GET_REGINFO_MC_DESC
35 #include "XCoreGenRegisterInfo.inc"
36 
37 static MCInstrInfo *createXCoreMCInstrInfo() {
38   MCInstrInfo *X = new MCInstrInfo();
39   InitXCoreMCInstrInfo(X);
40   return X;
41 }
42 
43 static MCRegisterInfo *createXCoreMCRegisterInfo(const Triple &TT) {
44   MCRegisterInfo *X = new MCRegisterInfo();
45   InitXCoreMCRegisterInfo(X, XCore::LR);
46   return X;
47 }
48 
49 static MCSubtargetInfo *
50 createXCoreMCSubtargetInfo(const Triple &TT, StringRef CPU, StringRef FS) {
51   return createXCoreMCSubtargetInfoImpl(TT, CPU, FS);
52 }
53 
54 static MCAsmInfo *createXCoreMCAsmInfo(const MCRegisterInfo &MRI,
55                                        const Triple &TT) {
56   MCAsmInfo *MAI = new XCoreMCAsmInfo(TT);
57 
58   // Initial state of the frame pointer is SP.
59   MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(nullptr, XCore::SP, 0);
60   MAI->addInitialFrameState(Inst);
61 
62   return MAI;
63 }
64 
65 static MCCodeGenInfo *createXCoreMCCodeGenInfo(const Triple &TT,
66                                                Reloc::Model RM,
67                                                CodeModel::Model CM,
68                                                CodeGenOpt::Level OL) {
69   MCCodeGenInfo *X = new MCCodeGenInfo();
70   if (CM == CodeModel::Default) {
71     CM = CodeModel::Small;
72   }
73   if (CM != CodeModel::Small && CM != CodeModel::Large)
74     report_fatal_error("Target only supports CodeModel Small or Large");
75 
76   X->initMCCodeGenInfo(RM, CM, OL);
77   return X;
78 }
79 
80 static MCInstPrinter *createXCoreMCInstPrinter(const Triple &T,
81                                                unsigned SyntaxVariant,
82                                                const MCAsmInfo &MAI,
83                                                const MCInstrInfo &MII,
84                                                const MCRegisterInfo &MRI) {
85   return new XCoreInstPrinter(MAI, MII, MRI);
86 }
87 
88 XCoreTargetStreamer::XCoreTargetStreamer(MCStreamer &S) : MCTargetStreamer(S) {}
89 XCoreTargetStreamer::~XCoreTargetStreamer() {}
90 
91 namespace {
92 
93 class XCoreTargetAsmStreamer : public XCoreTargetStreamer {
94   formatted_raw_ostream &OS;
95 public:
96   XCoreTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS);
97   void emitCCTopData(StringRef Name) override;
98   void emitCCTopFunction(StringRef Name) override;
99   void emitCCBottomData(StringRef Name) override;
100   void emitCCBottomFunction(StringRef Name) override;
101 };
102 
103 XCoreTargetAsmStreamer::XCoreTargetAsmStreamer(MCStreamer &S,
104                                                formatted_raw_ostream &OS)
105     : XCoreTargetStreamer(S), OS(OS) {}
106 
107 void XCoreTargetAsmStreamer::emitCCTopData(StringRef Name) {
108   OS << "\t.cc_top " << Name << ".data," << Name << '\n';
109 }
110 
111 void XCoreTargetAsmStreamer::emitCCTopFunction(StringRef Name) {
112   OS << "\t.cc_top " << Name << ".function," << Name << '\n';
113 }
114 
115 void XCoreTargetAsmStreamer::emitCCBottomData(StringRef Name) {
116   OS << "\t.cc_bottom " << Name << ".data\n";
117 }
118 
119 void XCoreTargetAsmStreamer::emitCCBottomFunction(StringRef Name) {
120   OS << "\t.cc_bottom " << Name << ".function\n";
121 }
122 }
123 
124 static MCTargetStreamer *createTargetAsmStreamer(MCStreamer &S,
125                                                  formatted_raw_ostream &OS,
126                                                  MCInstPrinter *InstPrint,
127                                                  bool isVerboseAsm) {
128   return new XCoreTargetAsmStreamer(S, OS);
129 }
130 
131 // Force static initialization.
132 extern "C" void LLVMInitializeXCoreTargetMC() {
133   // Register the MC asm info.
134   RegisterMCAsmInfoFn X(TheXCoreTarget, createXCoreMCAsmInfo);
135 
136   // Register the MC codegen info.
137   TargetRegistry::RegisterMCCodeGenInfo(TheXCoreTarget,
138                                         createXCoreMCCodeGenInfo);
139 
140   // Register the MC instruction info.
141   TargetRegistry::RegisterMCInstrInfo(TheXCoreTarget, createXCoreMCInstrInfo);
142 
143   // Register the MC register info.
144   TargetRegistry::RegisterMCRegInfo(TheXCoreTarget, createXCoreMCRegisterInfo);
145 
146   // Register the MC subtarget info.
147   TargetRegistry::RegisterMCSubtargetInfo(TheXCoreTarget,
148                                           createXCoreMCSubtargetInfo);
149 
150   // Register the MCInstPrinter
151   TargetRegistry::RegisterMCInstPrinter(TheXCoreTarget,
152                                         createXCoreMCInstPrinter);
153 
154   TargetRegistry::RegisterAsmTargetStreamer(TheXCoreTarget,
155                                             createTargetAsmStreamer);
156 }
157