1 //==-- WebAssemblyTargetStreamer.cpp - WebAssembly Target Streamer Methods --=// 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 defines WebAssembly-specific target streamer classes. 12 /// These are for implementing support for target-specific assembly directives. 13 /// 14 //===----------------------------------------------------------------------===// 15 16 #include "WebAssemblyTargetStreamer.h" 17 #include "InstPrinter/WebAssemblyInstPrinter.h" 18 #include "WebAssemblyMCTargetDesc.h" 19 #include "llvm/MC/MCContext.h" 20 #include "llvm/MC/MCSectionELF.h" 21 #include "llvm/MC/MCSubtargetInfo.h" 22 #include "llvm/MC/MCSymbolELF.h" 23 #include "llvm/Support/ELF.h" 24 #include "llvm/Support/ErrorHandling.h" 25 #include "llvm/Support/FormattedStream.h" 26 using namespace llvm; 27 28 WebAssemblyTargetStreamer::WebAssemblyTargetStreamer(MCStreamer &S) 29 : MCTargetStreamer(S) {} 30 31 WebAssemblyTargetAsmStreamer::WebAssemblyTargetAsmStreamer( 32 MCStreamer &S, formatted_raw_ostream &OS) 33 : WebAssemblyTargetStreamer(S), OS(OS) {} 34 35 WebAssemblyTargetELFStreamer::WebAssemblyTargetELFStreamer(MCStreamer &S) 36 : WebAssemblyTargetStreamer(S) {} 37 38 static void PrintTypes(formatted_raw_ostream &OS, ArrayRef<MVT> Types) { 39 bool First = true; 40 for (MVT Type : Types) { 41 if (First) 42 First = false; 43 else 44 OS << ", "; 45 OS << WebAssembly::TypeToString(Type); 46 } 47 OS << '\n'; 48 } 49 50 void WebAssemblyTargetAsmStreamer::emitParam(ArrayRef<MVT> Types) { 51 OS << "\t.param \t"; 52 PrintTypes(OS, Types); 53 } 54 55 void WebAssemblyTargetAsmStreamer::emitResult(ArrayRef<MVT> Types) { 56 OS << "\t.result \t"; 57 PrintTypes(OS, Types); 58 } 59 60 void WebAssemblyTargetAsmStreamer::emitLocal(ArrayRef<MVT> Types) { 61 OS << "\t.local \t"; 62 PrintTypes(OS, Types); 63 } 64 65 void WebAssemblyTargetAsmStreamer::emitEndFunc() { OS << "\t.endfunc\n"; } 66 67 void WebAssemblyTargetAsmStreamer::emitIndirectFunctionType( 68 StringRef name, SmallVectorImpl<MVT> &SignatureVTs, size_t NumResults) { 69 OS << "\t.functype\t" << name; 70 if (NumResults == 0) OS << ", void"; 71 for (auto Ty : SignatureVTs) { 72 OS << ", " << WebAssembly::TypeToString(Ty); 73 } 74 OS << "\n"; 75 } 76 77 // FIXME: What follows is not the real binary encoding. 78 79 static void EncodeTypes(MCStreamer &Streamer, ArrayRef<MVT> Types) { 80 Streamer.EmitIntValue(Types.size(), sizeof(uint64_t)); 81 for (MVT Type : Types) 82 Streamer.EmitIntValue(Type.SimpleTy, sizeof(uint64_t)); 83 } 84 85 void WebAssemblyTargetELFStreamer::emitParam(ArrayRef<MVT> Types) { 86 Streamer.EmitIntValue(WebAssembly::DotParam, sizeof(uint64_t)); 87 EncodeTypes(Streamer, Types); 88 } 89 90 void WebAssemblyTargetELFStreamer::emitResult(ArrayRef<MVT> Types) { 91 Streamer.EmitIntValue(WebAssembly::DotResult, sizeof(uint64_t)); 92 EncodeTypes(Streamer, Types); 93 } 94 95 void WebAssemblyTargetELFStreamer::emitLocal(ArrayRef<MVT> Types) { 96 Streamer.EmitIntValue(WebAssembly::DotLocal, sizeof(uint64_t)); 97 EncodeTypes(Streamer, Types); 98 } 99 100 void WebAssemblyTargetELFStreamer::emitEndFunc() { 101 Streamer.EmitIntValue(WebAssembly::DotEndFunc, sizeof(uint64_t)); 102 } 103
