MIPS disassembler support.

[oota-llvm.git] / lib / Target / Mips / MCTargetDesc / MipsMCTargetDesc.cpp

diff --git a/lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.cpp b/lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.cpp
index 7be6f81ac88c617605734d5488dcd279c2888272..f634f082be5a3c083ed15b02fef360a1244e8467 100644 (file)
--- a/lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.cpp
+++ b/lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.cpp
@@ -34,6 +34,38 @@
 
 using namespace llvm;
 
+static std::string ParseMipsTriple(StringRef TT, StringRef CPU) {
+  std::string MipsArchFeature;
+  size_t DashPosition = 0;
+  StringRef TheTriple;
+
+  // Let's see if there is a dash, like mips-unknown-linux.
+  DashPosition = TT.find('-');
+
+  if (DashPosition == StringRef::npos) {
+    // No dash, we check the string size.
+    TheTriple = TT.substr(0);
+  } else {
+    // We are only interested in substring before dash.
+    TheTriple = TT.substr(0,DashPosition);
+  }
+
+  if (TheTriple == "mips" || TheTriple == "mipsel") {
+    if (CPU.empty() || CPU == "mips32") {
+      MipsArchFeature = "+mips32";
+    } else if (CPU == "mips32r2") {
+      MipsArchFeature = "+mips32r2";
+    }
+  } else {
+      if (CPU.empty() || CPU == "mips64") {
+        MipsArchFeature = "+mips64";
+      } else if (CPU == "mips64r2") {
+        MipsArchFeature = "+mips64r2";
+      }
+  }
+  return MipsArchFeature;
+}
+
 static MCInstrInfo *createMipsMCInstrInfo() {
   MCInstrInfo *X = new MCInstrInfo();
   InitMipsMCInstrInfo(X);
@@ -48,8 +80,15 @@ static MCRegisterInfo *createMipsMCRegisterInfo(StringRef TT) {
 
 static MCSubtargetInfo *createMipsMCSubtargetInfo(StringRef TT, StringRef CPU,
                                                   StringRef FS) {
+  std::string ArchFS = ParseMipsTriple(TT,CPU);
+  if (!FS.empty()) {
+    if (!ArchFS.empty())
+      ArchFS = ArchFS + "," + FS.str();
+    else
+      ArchFS = FS;
+  }
   MCSubtargetInfo *X = new MCSubtargetInfo();
-  InitMipsMCSubtargetInfo(X, TT, CPU, FS);
+  InitMipsMCSubtargetInfo(X, TT, CPU, ArchFS);
   return X;
 }
 
@@ -145,13 +184,13 @@ extern "C" void LLVMInitializeMipsTargetMC() {
 
   // Register the asm backend.
   TargetRegistry::RegisterMCAsmBackend(TheMipsTarget,
-                                       createMipsAsmBackendEB);
+                                       createMipsAsmBackendEB32);
   TargetRegistry::RegisterMCAsmBackend(TheMipselTarget,
-                                       createMipsAsmBackendEL);
+                                       createMipsAsmBackendEL32);
   TargetRegistry::RegisterMCAsmBackend(TheMips64Target,
-                                       createMipsAsmBackendEB);
+                                       createMipsAsmBackendEB64);
   TargetRegistry::RegisterMCAsmBackend(TheMips64elTarget,
-                                       createMipsAsmBackendEL);
+                                       createMipsAsmBackendEL64);
 
   // Register the MC subtarget info.
   TargetRegistry::RegisterMCSubtargetInfo(TheMipsTarget,