Second try of initial ARM/Thumb disassembler check-in. It consists of a tablgen

backend (ARMDecoderEmitter) which emits the decoder functions for ARM and Thumb,
and the disassembler core which invokes the decoder function and builds up the
MCInst based on the decoded Opcode.

Reviewed by Chris Latter and Bob Wilson.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100233 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 50 insertions, 0 deletions

diff --git a/utils/TableGen/ARMDecoderEmitter.h b/utils/TableGen/ARMDecoderEmitter.h
new file mode 100644
index 0000000000..66147e2f8c
--- /dev/null
+++ b/utils/TableGen/ARMDecoderEmitter.h
@@ -0,0 +1,50 @@
+//===------------ ARMDecoderEmitter.h - Decoder Generator -------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is part of the ARM Disassembler.
+// It contains the tablegen backend declaration ARMDecoderEmitter.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef ARMDECODEREMITTER_H
+#define ARMDECODEREMITTER_H
+
+#include "TableGenBackend.h"
+
+#include "llvm/Support/DataTypes.h"
+
+namespace llvm {
+
+class ARMDecoderEmitter : public TableGenBackend {
+  RecordKeeper &Records;
+public:
+  ARMDecoderEmitter(RecordKeeper &R) : Records(R) {
+    initBackend();
+  }
+    
+  ~ARMDecoderEmitter() {
+    shutdownBackend();
+  }
+	
+  // run - Output the code emitter
+  void run(raw_ostream &o);
+    
+private:
+  // Helper class for ARMDecoderEmitter.
+  class ARMDEBackend;
+
+  ARMDEBackend *Backend;
+    
+  void initBackend();
+  void shutdownBackend();
+};
+
+} // end llvm namespace
+
+#endif