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"
26using namespace llvm;
27
28WebAssemblyTargetStreamer::WebAssemblyTargetStreamer(MCStreamer &S)
29    : MCTargetStreamer(S) {}
30
31WebAssemblyTargetAsmStreamer::WebAssemblyTargetAsmStreamer(
32    MCStreamer &S, formatted_raw_ostream &OS)
33    : WebAssemblyTargetStreamer(S), OS(OS) {}
34
35WebAssemblyTargetELFStreamer::WebAssemblyTargetELFStreamer(MCStreamer &S)
36    : WebAssemblyTargetStreamer(S) {}
37
38static 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
50void WebAssemblyTargetAsmStreamer::emitParam(ArrayRef<MVT> Types) {
51  OS << "\t.param  \t";
52  PrintTypes(OS, Types);
53}
54
55void WebAssemblyTargetAsmStreamer::emitResult(ArrayRef<MVT> Types) {
56  OS << "\t.result \t";
57  PrintTypes(OS, Types);
58}
59
60void WebAssemblyTargetAsmStreamer::emitLocal(ArrayRef<MVT> Types) {
61  OS << "\t.local  \t";
62  PrintTypes(OS, Types);
63}
64
65void WebAssemblyTargetAsmStreamer::emitEndFunc() { OS << "\t.endfunc\n"; }
66
67void 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
79static 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
85void WebAssemblyTargetELFStreamer::emitParam(ArrayRef<MVT> Types) {
86  Streamer.EmitIntValue(WebAssembly::DotParam, sizeof(uint64_t));
87  EncodeTypes(Streamer, Types);
88}
89
90void WebAssemblyTargetELFStreamer::emitResult(ArrayRef<MVT> Types) {
91  Streamer.EmitIntValue(WebAssembly::DotResult, sizeof(uint64_t));
92  EncodeTypes(Streamer, Types);
93}
94
95void WebAssemblyTargetELFStreamer::emitLocal(ArrayRef<MVT> Types) {
96  Streamer.EmitIntValue(WebAssembly::DotLocal, sizeof(uint64_t));
97  EncodeTypes(Streamer, Types);
98}
99
100void WebAssemblyTargetELFStreamer::emitEndFunc() {
101  Streamer.EmitIntValue(WebAssembly::DotEndFunc, sizeof(uint64_t));
102}
103