capstone

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From 7a436110ef15c803dc8524af2fb5612bcacbb126 Mon Sep 17 00:00:00 2001
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From: mephi42 <mephi42@gmail.com>
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Date: Tue, 7 Aug 2018 20:55:32 +0200
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Subject: [PATCH 6/7] capstone: generate *MappingInsn.inc
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---
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 lib/Target/SystemZ/CMakeLists.txt   |  1 +
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 utils/TableGen/InstrInfoEmitter.cpp | 95 +++++++++++++++++++++++++++++
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 utils/TableGen/TableGen.cpp         |  6 ++
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 utils/TableGen/TableGenBackends.h   |  1 +
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 4 files changed, 103 insertions(+)
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diff --git a/lib/Target/SystemZ/CMakeLists.txt b/lib/Target/SystemZ/CMakeLists.txt
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index f83b4242fb4..4b5d9c4a3b2 100644
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--- a/lib/Target/SystemZ/CMakeLists.txt
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+++ b/lib/Target/SystemZ/CMakeLists.txt
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@@ -6,6 +6,7 @@ tablegen(LLVM SystemZGenCallingConv.inc -gen-callingconv)
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 tablegen(LLVM SystemZGenDAGISel.inc -gen-dag-isel)
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 tablegen(LLVM SystemZGenDisassemblerTables.inc -gen-disassembler)
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 tablegen(LLVM SystemZGenInstrInfo.inc -gen-instr-info)
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+tablegen(LLVM SystemZMappingInsn.inc -mapping-insn)
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 tablegen(LLVM SystemZGenMCCodeEmitter.inc -gen-emitter)
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 tablegen(LLVM SystemZGenRegisterInfo.inc -gen-register-info)
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 tablegen(LLVM SystemZGenSubtargetInfo.inc -gen-subtarget)
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diff --git a/utils/TableGen/InstrInfoEmitter.cpp b/utils/TableGen/InstrInfoEmitter.cpp
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index 2f3a2729262..14ab1ea8a72 100644
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--- a/utils/TableGen/InstrInfoEmitter.cpp
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+++ b/utils/TableGen/InstrInfoEmitter.cpp
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@@ -744,4 +744,99 @@ void EmitInstrInfo(RecordKeeper &RK, raw_ostream &OS) {
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 #endif
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 }
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+#ifdef CAPSTONE
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+std::string GetPublicName(const CodeGenInstruction *Inst) {
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+  std::string Name = Inst->TheDef->getName();
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+  // Apply backward compatibility fixups.
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+  // BRNLE -> BNLER.
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+  if (Name.length() >= 5 && Name.substr(0, 5) == "BRAsm") {
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+    Name = "B" + Name.substr(5, Name.length() - 5) + "R";
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+  }
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+  // SSKEOpt -> SSKE.
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+  while (Name.length() >= 3 && Name.substr(Name.length() - 3, 3) == "Opt") {
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+      Name = Name.substr(0, Name.length() - 3);
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+  }
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+  // BRCLAsm -> BRCL.
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+  while (true) {
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+    size_t pos = Name.find("Asm");
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+    if (pos == std::string::npos) {
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+       break;
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+    }
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+    Name = Name.substr(0, pos) + Name.substr(pos + 3);
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+  }
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+  // CPSDRxx -> CPSDR.
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+  if (Name.length() >= 2) {
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+    std::string Suffix2 = Name.substr(Name.length() - 2, 2);
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+    if (Suffix2 == "dd" || Suffix2 == "ds" ||
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+        Suffix2 == "sd" || Suffix2 == "ss") {
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+      Name = Name.substr(0, Name.length() - 2);
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+    }
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+  }
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+  return "SYSZ_INS_" + Name;
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+}
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+
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+std::string GetRegisterName(Record *Reg) {
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+  std::string Name = Reg->getName();
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+  for (char& c : Name) {
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+    c = toupper(c);
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+  }
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+  // R0L, R0D -> R0.
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+  if (Name.length() >= 3 &&
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+      Name[Name.length() - 3] == 'R' &&
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+      (Name[Name.length() - 1] == 'L' ||
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+       Name[Name.length() - 1] == 'D')) {
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+    Name = Name.substr(0, Name.length() - 3) + Name[Name.length() - 2];
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+  }
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+  return "SYSZ_REG_" + Name;
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+}
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+
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+std::string GetGroupName(Record *Pred) {
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+  std::string Name = Pred->getName();
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+  for (char& c : Name) {
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+    c = toupper(c);
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+  }
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+  if (Name.length() >= 7 && Name.substr(0, 7) == "FEATURE") {
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+    Name = Name.substr(7);
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+  }
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+  return "SYSZ_GRP_" + Name;
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+}
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+
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+void EmitMappingInsn(RecordKeeper &RK, raw_ostream &OS) {
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+  OS << "// This is auto-gen data for Capstone engine (www.capstone-engine.org)\n"
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+        "// By Nguyen Anh Quynh <aquynh@gmail.com>\n"
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+        "\n";
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+  CodeGenTarget Target(RK);
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+  for (const CodeGenInstruction *Inst : Target.getInstructionsByEnumValue()) {
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+    if (Inst->TheDef->getValueAsBit("isPseudo") ||
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+        Inst->TheDef->getValueAsBit("isCodeGenOnly")) {
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+      continue;
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+    }
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+    OS << "{\n"
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+       << "\t" << Target.getName() << "_" << Inst->TheDef->getName() << ", "
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+       << GetPublicName(Inst) << ",\n"
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+       << "#ifndef CAPSTONE_DIET\n"
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+       << "\t{ ";
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+    for (Record *Use : Inst->TheDef->getValueAsListOfDefs("Uses")) {
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+      OS << GetRegisterName(Use) << ", ";
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+    }
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+    OS << "0 }, { ";
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+    for (Record *Def : Inst->TheDef->getValueAsListOfDefs("Defs")) {
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+      OS << GetRegisterName(Def) << ", ";
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+    }
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+    OS << "0 }, { ";
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+    ListInit *Predicates = Inst->TheDef->getValueAsListInit("Predicates");
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+    for (unsigned i = 0; i < Predicates->size(); ++i) {
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+      OS << GetGroupName(Predicates->getElementAsRecord(i)) << ", ";
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+    }
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+    OS << "0 }, "
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+       << Inst->TheDef->getValueAsBit("isBranch")
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+       << ", "
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+       << Inst->TheDef->getValueAsBit("isIndirectBranch")
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+       << "\n"
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+       << "#endif\n"
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+       << "},\n";
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+  }
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+}
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+#endif
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+
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 } // end llvm namespace
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diff --git a/utils/TableGen/TableGen.cpp b/utils/TableGen/TableGen.cpp
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index cf1404d8769..bbb4e860536 100644
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--- a/utils/TableGen/TableGen.cpp
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+++ b/utils/TableGen/TableGen.cpp
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@@ -27,6 +27,7 @@ enum ActionType {
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   GenEmitter,
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   GenRegisterInfo,
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   GenInstrInfo,
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+  MappingInsn,
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   GenInstrDocs,
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   GenAsmWriter,
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   GenAsmMatcher,
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@@ -65,6 +66,8 @@ namespace {
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                                "Generate registers and register classes info"),
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                     clEnumValN(GenInstrInfo, "gen-instr-info",
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                                "Generate instruction descriptions"),
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+                    clEnumValN(MappingInsn, "mapping-insn",
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+                               ""),
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                     clEnumValN(GenInstrDocs, "gen-instr-docs",
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                                "Generate instruction documentation"),
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                     clEnumValN(GenCallingConv, "gen-callingconv",
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@@ -135,6 +138,9 @@ bool LLVMTableGenMain(raw_ostream &OS, RecordKeeper &Records) {
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   case GenInstrInfo:
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     EmitInstrInfo(Records, OS);
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     break;
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+  case MappingInsn:
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+    EmitMappingInsn(Records, OS);
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+    break;
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   case GenInstrDocs:
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     EmitInstrDocs(Records, OS);
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     break;
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diff --git a/utils/TableGen/TableGenBackends.h b/utils/TableGen/TableGenBackends.h
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index 1329a6d833f..a41e46b1db0 100644
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--- a/utils/TableGen/TableGenBackends.h
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+++ b/utils/TableGen/TableGenBackends.h
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@@ -75,6 +75,7 @@ void EmitDFAPacketizer(RecordKeeper &RK, raw_ostream &OS);
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 void EmitDisassembler(RecordKeeper &RK, raw_ostream &OS);
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 void EmitFastISel(RecordKeeper &RK, raw_ostream &OS);
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 void EmitInstrInfo(RecordKeeper &RK, raw_ostream &OS);
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+void EmitMappingInsn(RecordKeeper &RK, raw_ostream &OS);
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 void EmitInstrDocs(RecordKeeper &RK, raw_ostream &OS);
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 void EmitPseudoLowering(RecordKeeper &RK, raw_ostream &OS);
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 void EmitCompressInst(RecordKeeper &RK, raw_ostream &OS);
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-- 
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2.19.1
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