1//==-- WebAssemblyTargetStreamer.cpp - WebAssembly Target Streamer Methods --=//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8///
9/// \file
10/// This file defines WebAssembly-specific target streamer classes.
11/// These are for implementing support for target-specific assembly directives.
12///
13//===----------------------------------------------------------------------===//
14
15#include "MCTargetDesc/WebAssemblyTargetStreamer.h"
16#include "MCTargetDesc/WebAssemblyMCAsmInfo.h"
17#include "MCTargetDesc/WebAssemblyMCTypeUtilities.h"
18#include "llvm/MC/MCContext.h"
19#include "llvm/MC/MCSectionWasm.h"
20#include "llvm/MC/MCSymbolWasm.h"
21#include "llvm/Support/ErrorHandling.h"
22#include "llvm/Support/FormattedStream.h"
23using namespace llvm;
24
25WebAssemblyTargetStreamer::WebAssemblyTargetStreamer(MCStreamer &S)
26 : MCTargetStreamer(S) {}
27
28void WebAssemblyTargetStreamer::emitValueType(wasm::ValType Type) {
29 Streamer.emitIntValue(Value: uint8_t(Type), Size: 1);
30}
31
32WebAssemblyTargetAsmStreamer::WebAssemblyTargetAsmStreamer(
33 MCStreamer &S, formatted_raw_ostream &OS)
34 : WebAssemblyTargetStreamer(S), OS(OS) {}
35
36WebAssemblyTargetWasmStreamer::WebAssemblyTargetWasmStreamer(MCStreamer &S)
37 : WebAssemblyTargetStreamer(S) {}
38
39static void printTypes(formatted_raw_ostream &OS,
40 ArrayRef<wasm::ValType> Types) {
41 bool First = true;
42 for (auto Type : Types) {
43 if (First)
44 First = false;
45 else
46 OS << ", ";
47 OS << WebAssembly::typeToString(Type);
48 }
49 OS << '\n';
50}
51
52void WebAssemblyTargetAsmStreamer::emitLocal(ArrayRef<wasm::ValType> Types) {
53 if (!Types.empty()) {
54 OS << "\t.local \t";
55 printTypes(OS, Types);
56 }
57}
58
59void WebAssemblyTargetAsmStreamer::emitFunctionType(const MCSymbolWasm *Sym) {
60 assert(Sym->isFunction());
61 OS << "\t.functype\t" << Sym->getName() << " ";
62 OS << WebAssembly::signatureToString(Sig: Sym->getSignature());
63 OS << "\n";
64}
65
66void WebAssemblyTargetAsmStreamer::emitGlobalType(const MCSymbolWasm *Sym) {
67 assert(Sym->isGlobal());
68 OS << "\t.globaltype\t" << Sym->getName() << ", "
69 << WebAssembly::typeToString(
70 Type: static_cast<wasm::ValType>(Sym->getGlobalType().Type));
71 if (!Sym->getGlobalType().Mutable)
72 OS << ", immutable";
73 OS << '\n';
74}
75
76void WebAssemblyTargetAsmStreamer::emitTableType(const MCSymbolWasm *Sym) {
77 assert(Sym->isTable());
78 const wasm::WasmTableType &Type = Sym->getTableType();
79 OS << "\t.tabletype\t" << Sym->getName() << ", "
80 << WebAssembly::typeToString(Type: static_cast<wasm::ValType>(Type.ElemType));
81 bool HasMaximum = Type.Limits.Flags & wasm::WASM_LIMITS_FLAG_HAS_MAX;
82 if (Type.Limits.Minimum != 0 || HasMaximum) {
83 OS << ", " << Type.Limits.Minimum;
84 if (HasMaximum)
85 OS << ", " << Type.Limits.Maximum;
86 }
87 OS << '\n';
88}
89
90void WebAssemblyTargetAsmStreamer::emitTagType(const MCSymbolWasm *Sym) {
91 assert(Sym->isTag());
92 OS << "\t.tagtype\t" << Sym->getName() << " ";
93 OS << WebAssembly::typeListToString(List: Sym->getSignature()->Params);
94 OS << "\n";
95}
96
97void WebAssemblyTargetAsmStreamer::emitImportModule(const MCSymbolWasm *Sym,
98 StringRef ImportModule) {
99 OS << "\t.import_module\t" << Sym->getName() << ", "
100 << ImportModule << '\n';
101}
102
103void WebAssemblyTargetAsmStreamer::emitImportName(const MCSymbolWasm *Sym,
104 StringRef ImportName) {
105 OS << "\t.import_name\t" << Sym->getName() << ", "
106 << ImportName << '\n';
107}
108
109void WebAssemblyTargetAsmStreamer::emitExportName(const MCSymbolWasm *Sym,
110 StringRef ExportName) {
111 OS << "\t.export_name\t" << Sym->getName() << ", "
112 << ExportName << '\n';
113}
114
115void WebAssemblyTargetAsmStreamer::emitIndIdx(const MCExpr *Value) {
116 OS << "\t.indidx\t";
117 getContext().getAsmInfo()->printExpr(OS, *Value);
118 OS << '\n';
119}
120
121void WebAssemblyTargetWasmStreamer::emitLocal(ArrayRef<wasm::ValType> Types) {
122 SmallVector<std::pair<wasm::ValType, uint32_t>, 4> Grouped;
123 for (auto Type : Types) {
124 if (Grouped.empty() || Grouped.back().first != Type)
125 Grouped.push_back(Elt: std::make_pair(x&: Type, y: 1));
126 else
127 ++Grouped.back().second;
128 }
129
130 Streamer.emitULEB128IntValue(Value: Grouped.size());
131 for (auto Pair : Grouped) {
132 Streamer.emitULEB128IntValue(Value: Pair.second);
133 emitValueType(Type: Pair.first);
134 }
135}
136
137void WebAssemblyTargetWasmStreamer::emitIndIdx(const MCExpr *Value) {
138 llvm_unreachable(".indidx encoding not yet implemented");
139}
140