xref: /aosp_15_r20/external/capstone/contrib/sysz_update/0005-capstone-generate-GenAsmWriter.inc.patch (revision 9a0e4156d50a75a99ec4f1653a0e9602a5d45c18)

From 5569e48b9cb34a33910e1e850fbfabc999f016a2 Mon Sep 17 00:00:00 2001
From: mephi42 <[email protected]>
Date: Tue, 7 Aug 2018 20:00:08 +0200
Subject: [PATCH 5/7] capstone: generate *GenAsmWriter.inc

---
 utils/TableGen/AsmWriterEmitter.cpp | 89 +++++++++++++++++++++++++++--
 utils/TableGen/AsmWriterInst.cpp    |  4 ++
 2 files changed, 87 insertions(+), 6 deletions(-)

diff --git a/utils/TableGen/AsmWriterEmitter.cpp b/utils/TableGen/AsmWriterEmitter.cpp
index 3c4c9c8e5c6..133800d217c 100644
--- a/utils/TableGen/AsmWriterEmitter.cpp
+++ b/utils/TableGen/AsmWriterEmitter.cpp
@@ -272,16 +272,22 @@ static void UnescapeString(std::string &Str) {
 /// clearing the Instructions vector.
 void AsmWriterEmitter::EmitPrintInstruction(raw_ostream &O) {
   Record *AsmWriter = Target.getAsmWriter();
+#ifndef CAPSTONE
   StringRef ClassName = AsmWriter->getValueAsString("AsmWriterClassName");
+#endif
   bool PassSubtarget = AsmWriter->getValueAsInt("PassSubtarget");

   O <<
   "/// printInstruction - This method is automatically generated by tablegen\n"
   "/// from the instruction set description.\n"
+#ifdef CAPSTONE
+    "static void printInstruction(MCInst *MI, SStream *O, MCRegisterInfo *MRI)\n{\n";
+#else
     "void " << Target.getName() << ClassName
             << "::printInstruction(const MCInst *MI, "
             << (PassSubtarget ? "const MCSubtargetInfo &STI, " : "")
             << "raw_ostream &O) {\n";
+#endif

   // Build an aggregate string, and build a table of offsets into it.
   SequenceToOffsetTable<std::string> StringTable;
@@ -379,9 +385,16 @@ void AsmWriterEmitter::EmitPrintInstruction(raw_ostream &O) {
   }

   // Emit the string table itself.
+#ifdef CAPSTONE
+  O << "#ifndef CAPSTONE_DIET\n";
+#endif
   O << "  static const char AsmStrs[] = {\n";
   StringTable.emit(O, printChar);
-  O << "  };\n\n";
+  O << "  };\n"
+#ifdef CAPSTONE
+    << "#endif\n"
+#endif
+    << "\n";

   // Emit the lookup tables in pieces to minimize wasted bytes.
   unsigned BytesNeeded = ((OpcodeInfoBits - BitsLeft) + 7) / 8;
@@ -409,21 +422,45 @@ void AsmWriterEmitter::EmitPrintInstruction(raw_ostream &O) {
     // If the total bits is more than 32-bits we need to use a 64-bit type.
     if (BitsLeft < (OpcodeInfoBits - 32))
       BitsOS << "(uint64_t)";
-    BitsOS << "OpInfo" << Table << "[MI->getOpcode()] << " << Shift << ";\n";
+    BitsOS << "OpInfo" << Table << "["
+#ifdef CAPSTONE
+           << "MCInst_getOpcode(MI)"
+#else
+           << "MI->getOpcode()"
+#endif
+           << "] << " << Shift << ";\n";
     // Prepare the shift for the next iteration and increment the table count.
     Shift += TableSize;
     ++Table;
   }

   // Emit the initial tab character.
+#ifndef CAPSTONE
   O << "  O << \"\\t\";\n\n";
+#endif

   O << "  // Emit the opcode for the instruction.\n";
   O << BitsString;

   // Emit the starting string.
-  O << "  assert(Bits != 0 && \"Cannot print this instruction.\");\n"
-    << "  O << AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << ")-1;\n\n";
+  O << "  "
+#ifdef CAPSTONE
+    << "// "
+#endif
+    << "assert(Bits != 0 && \"Cannot print this instruction.\");\n"
+#ifdef CAPSTONE
+    << "#ifndef CAPSTONE_DIET\n"
+    << "  SStream_concat0(O, "
+#else
+    << "  O << "
+#endif
+    << "AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << ")-1"
+#ifdef CAPSTONE
+    << ");\n"
+    << "#endif\n\n";
+#else
+    << ");\n\n";
+#endif

   // Output the table driven operand information.
   BitsLeft = OpcodeInfoBits-AsmStrBits;
@@ -455,7 +492,11 @@ void AsmWriterEmitter::EmitPrintInstruction(raw_ostream &O) {
       O << "  switch ((Bits >> "
         << (OpcodeInfoBits-BitsLeft) << ") & "
         << ((1 << NumBits)-1) << ") {\n"
-        << "  default: llvm_unreachable(\"Invalid command number.\");\n";
+        << "  default: "
+#ifdef CAPSTONE
+        << "// "
+#endif
+        << "llvm_unreachable(\"Invalid command number.\");\n";

       // Print out all the cases.
       for (unsigned j = 0, e = Commands.size(); j != e; ++j) {
@@ -536,6 +577,9 @@ emitRegisterNameString(raw_ostream &O, StringRef AltName,
   }

   StringTable.layout();
+#ifdef CAPSTONE
+  O << "#ifndef CAPSTONE_DIET\n";
+#endif
   O << "  static const char AsmStrs" << AltName << "[] = {\n";
   StringTable.emit(O, printChar);
   O << "  };\n\n";
@@ -552,8 +596,10 @@ emitRegisterNameString(raw_ostream &O, StringRef AltName,
 }

 void AsmWriterEmitter::EmitGetRegisterName(raw_ostream &O) {
+#ifndef CAPSTONE
   Record *AsmWriter = Target.getAsmWriter();
   StringRef ClassName = AsmWriter->getValueAsString("AsmWriterClassName");
+#endif
   const auto &Registers = Target.getRegBank().getRegisters();
   const std::vector<Record*> &AltNameIndices = Target.getRegAltNameIndices();
   bool hasAltNames = AltNameIndices.size() > 1;
@@ -563,12 +609,20 @@ void AsmWriterEmitter::EmitGetRegisterName(raw_ostream &O) {
   "\n\n/// getRegisterName - This method is automatically generated by tblgen\n"
   "/// from the register set description.  This returns the assembler name\n"
   "/// for the specified register.\n"
+#ifdef CAPSTONE
+  "static const char *getRegisterName(unsigned RegNo)\n{\n";
+#else
   "const char *" << Target.getName() << ClassName << "::";
   if (hasAltNames)
     O << "\ngetRegisterName(unsigned RegNo, unsigned AltIdx) {\n";
   else
     O << "getRegisterName(unsigned RegNo) {\n";
-  O << "  assert(RegNo && RegNo < " << (Registers.size()+1)
+#endif
+  O << "  "
+#ifdef CAPSTONE
+    << "// "
+#endif
+    << "assert(RegNo && RegNo < " << (Registers.size()+1)
     << " && \"Invalid register number!\");\n"
     << "\n";

@@ -595,10 +649,22 @@ void AsmWriterEmitter::EmitGetRegisterName(raw_ostream &O) {
     }
     O << "  }\n";
   } else {
+#ifdef CAPSTONE
+    O << "  //int i;\n"
+      << "  //for (i = 0; i < sizeof(RegAsmOffset); i++)\n"
+      << "  //     printf(\"%s = %u\\n\", AsmStrs+RegAsmOffset[i], i + 1);\n"
+      << "  //printf(\"*************************\\n\");\n"
+#else
     O << "  assert (*(AsmStrs+RegAsmOffset[RegNo-1]) &&\n"
       << "          \"Invalid alt name index for register!\");\n"
+#endif
       << "  return AsmStrs+RegAsmOffset[RegNo-1];\n";
   }
+#ifdef CAPSTONE
+  O << "#else\n"
+    << "  return NULL;\n"
+    << "#endif\n";
+#endif
   O << "}\n";
 }

@@ -1135,9 +1201,20 @@ AsmWriterEmitter::AsmWriterEmitter(RecordKeeper &R) : Records(R), Target(R) {
 }

 void AsmWriterEmitter::run(raw_ostream &O) {
+#ifdef CAPSTONE
+  O << "/* Capstone Disassembly Engine */\n"
+       "/* By Nguyen Anh Quynh <[email protected]>, 2013-2015 */\n"
+       "\n"
+       "#include <stdio.h>\t// debug\n"
+       "#include <capstone/platform.h>\n"
+       "\n"
+       "\n";
+#endif
   EmitPrintInstruction(O);
   EmitGetRegisterName(O);
+#ifndef CAPSTONE
   EmitPrintAliasInstruction(O);
+#endif
 }

 namespace llvm {
diff --git a/utils/TableGen/AsmWriterInst.cpp b/utils/TableGen/AsmWriterInst.cpp
index 2c19e5d663d..6fa751e50df 100644
--- a/utils/TableGen/AsmWriterInst.cpp
+++ b/utils/TableGen/AsmWriterInst.cpp
@@ -28,9 +28,13 @@ static bool isIdentChar(char C) {

 std::string AsmWriterOperand::getCode(bool PassSubtarget) const {
   if (OperandType == isLiteralTextOperand) {
+#ifdef CAPSTONE
+    return "SStream_concat0(O, \"" + Str + "\");";
+#else
     if (Str.size() == 1)
       return "O << '" + Str + "';";
     return "O << \"" + Str + "\";";
+#endif
   }

   if (OperandType == isLiteralStatementOperand)
--
2.19.1