1 //===-- WebAssemblyMCTargetDesc.cpp - WebAssembly 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 /// \file
11 /// \brief This file provides WebAssembly-specific target descriptions.
12 ///
13 //===----------------------------------------------------------------------===//
14 
15 #include "WebAssemblyMCTargetDesc.h"
16 #include "InstPrinter/WebAssemblyInstPrinter.h"
17 #include "WebAssemblyMCAsmInfo.h"
18 #include "WebAssemblyTargetStreamer.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/TargetRegistry.h"
24 using namespace llvm;
25 
26 #define DEBUG_TYPE "wasm-mc-target-desc"
27 
28 #define GET_INSTRINFO_MC_DESC
29 #include "WebAssemblyGenInstrInfo.inc"
30 
31 #define GET_SUBTARGETINFO_MC_DESC
32 #include "WebAssemblyGenSubtargetInfo.inc"
33 
34 #define GET_REGINFO_MC_DESC
35 #include "WebAssemblyGenRegisterInfo.inc"
36 
37 static MCAsmInfo *createMCAsmInfo(const MCRegisterInfo & /*MRI*/,
38                                   const Triple &TT) {
39   if (TT.isOSBinFormatELF())
40     return new WebAssemblyMCAsmInfoELF(TT);
41   return new WebAssemblyMCAsmInfo(TT);
42 }
43 
44 static MCInstrInfo *createMCInstrInfo() {
45   MCInstrInfo *X = new MCInstrInfo();
46   InitWebAssemblyMCInstrInfo(X);
47   return X;
48 }
49 
50 static MCRegisterInfo *createMCRegisterInfo(const Triple & /*T*/) {
51   MCRegisterInfo *X = new MCRegisterInfo();
52   InitWebAssemblyMCRegisterInfo(X, 0);
53   return X;
54 }
55 
56 static MCInstPrinter *createMCInstPrinter(const Triple & /*T*/,
57                                           unsigned SyntaxVariant,
58                                           const MCAsmInfo &MAI,
59                                           const MCInstrInfo &MII,
60                                           const MCRegisterInfo &MRI) {
61   assert(SyntaxVariant == 0 && "WebAssembly only has one syntax variant");
62   return new WebAssemblyInstPrinter(MAI, MII, MRI);
63 }
64 
65 static MCCodeEmitter *createCodeEmitter(const MCInstrInfo &MCII,
66                                         const MCRegisterInfo & /*MRI*/,
67                                         MCContext &Ctx) {
68   return createWebAssemblyMCCodeEmitter(MCII);
69 }
70 
71 static MCAsmBackend *createAsmBackend(const Target & /*T*/,
72                                       const MCRegisterInfo & /*MRI*/,
73                                       const Triple &TT, StringRef /*CPU*/,
74                                       const MCTargetOptions & /*Options*/) {
75   return createWebAssemblyAsmBackend(TT);
76 }
77 
78 static MCSubtargetInfo *createMCSubtargetInfo(const Triple &TT, StringRef CPU,
79                                               StringRef FS) {
80   return createWebAssemblyMCSubtargetInfoImpl(TT, CPU, FS);
81 }
82 
83 static MCTargetStreamer *
84 createObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI) {
85   const Triple &TT = STI.getTargetTriple();
86   if (TT.isOSBinFormatELF())
87     return new WebAssemblyTargetELFStreamer(S);
88 
89   return new WebAssemblyTargetWasmStreamer(S);
90 }
91 
92 static MCTargetStreamer *createAsmTargetStreamer(MCStreamer &S,
93                                                  formatted_raw_ostream &OS,
94                                                  MCInstPrinter * /*InstPrint*/,
95                                                  bool /*isVerboseAsm*/) {
96   return new WebAssemblyTargetAsmStreamer(S, OS);
97 }
98 
99 // Force static initialization.
100 extern "C" void LLVMInitializeWebAssemblyTargetMC() {
101   for (Target *T :
102        {&getTheWebAssemblyTarget32(), &getTheWebAssemblyTarget64()}) {
103     // Register the MC asm info.
104     RegisterMCAsmInfoFn X(*T, createMCAsmInfo);
105 
106     // Register the MC instruction info.
107     TargetRegistry::RegisterMCInstrInfo(*T, createMCInstrInfo);
108 
109     // Register the MC register info.
110     TargetRegistry::RegisterMCRegInfo(*T, createMCRegisterInfo);
111 
112     // Register the MCInstPrinter.
113     TargetRegistry::RegisterMCInstPrinter(*T, createMCInstPrinter);
114 
115     // Register the MC code emitter.
116     TargetRegistry::RegisterMCCodeEmitter(*T, createCodeEmitter);
117 
118     // Register the ASM Backend.
119     TargetRegistry::RegisterMCAsmBackend(*T, createAsmBackend);
120 
121     // Register the MC subtarget info.
122     TargetRegistry::RegisterMCSubtargetInfo(*T, createMCSubtargetInfo);
123 
124     // Register the object target streamer.
125     TargetRegistry::RegisterObjectTargetStreamer(*T,
126                                                  createObjectTargetStreamer);
127     // Register the asm target streamer.
128     TargetRegistry::RegisterAsmTargetStreamer(*T, createAsmTargetStreamer);
129   }
130 }
131 
132 wasm::ValType WebAssembly::toValType(const MVT &Ty) {
133   switch (Ty.SimpleTy) {
134   case MVT::i32: return wasm::ValType::I32;
135   case MVT::i64: return wasm::ValType::I64;
136   case MVT::f32: return wasm::ValType::F32;
137   case MVT::f64: return wasm::ValType::F64;
138   default: llvm_unreachable("unexpected type");
139   }
140 }
141