From 4520a10fdbaabf1c0cd98b43a61469c5f0e76f38 Mon Sep 17 00:00:00 2001
From: Akira Hatanaka <ahatanaka@mips.com>
Date: Fri, 30 Sep 2011 20:40:03 +0000
Subject: [PATCH] Initial implementation of MipsMCCodeEmitter.

Patch by Reed Kotler at Mips Technologies.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140878 91177308-0d34-0410-b5e6-96231b3b80d8
---
 .../Mips/MCTargetDesc/MipsMCCodeEmitter.cpp   | 52 +++++++++++++++++++
 .../Mips/MCTargetDesc/MipsMCTargetDesc.cpp    |  9 ++++
 .../Mips/MCTargetDesc/MipsMCTargetDesc.h      |  8 ++-
 3 files changed, 68 insertions(+), 1 deletion(-)
 create mode 100644 lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp

diff --git a/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp b/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
new file mode 100644
index 00000000000..d66de23ba11
--- /dev/null
+++ b/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
@@ -0,0 +1,52 @@
+//===-- MipsMCCodeEmitter.cpp - Convert Mips code to machine code ---------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the MipsMCCodeEmitter class.
+//
+//===----------------------------------------------------------------------===//
+//
+#define DEBUG_TYPE "mccodeemitter"
+#include "llvm/MC/MCCodeEmitter.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/ADT/APFloat.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/Support/raw_ostream.h"
+#include "MCTargetDesc/MipsMCTargetDesc.h"
+
+using namespace llvm;
+
+namespace {
+class MipsMCCodeEmitter : public MCCodeEmitter {
+  MipsMCCodeEmitter(const MipsMCCodeEmitter &); // DO NOT IMPLEMENT
+  void operator=(const MipsMCCodeEmitter &); // DO NOT IMPLEMENT
+  const MCInstrInfo &MCII;
+  const MCSubtargetInfo &STI;
+
+public:
+  MipsMCCodeEmitter(const MCInstrInfo &mcii, const MCSubtargetInfo &sti,
+                    MCContext &ctx)
+    : MCII(mcii), STI(sti) {}
+
+  ~MipsMCCodeEmitter() {}
+
+  void EncodeInstruction(const MCInst &MI, raw_ostream &OS,
+                         SmallVectorImpl<MCFixup> &Fixups) const {
+  }
+}; // class MipsMCCodeEmitter
+}  // namespace
+
+MCCodeEmitter *llvm::createMipsMCCodeEmitter(const MCInstrInfo &MCII,
+                                             const MCSubtargetInfo &STI,
+                                             MCContext &Ctx) {
+  return new MipsMCCodeEmitter(MCII, STI, Ctx);
+}
diff --git a/lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.cpp b/lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.cpp
index cd5f291b1dc..87f88003368 100644
--- a/lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.cpp
+++ b/lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.cpp
@@ -107,6 +107,15 @@ extern "C" void LLVMInitializeMipsTargetMC() {
   TargetRegistry::RegisterMCRegInfo(TheMips64elTarget,
                                     createMipsMCRegisterInfo);
 
+  // Register the MC Code Emitter
+  TargetRegistry::RegisterMCCodeEmitter(TheMipsTarget, createMipsMCCodeEmitter);
+  TargetRegistry::RegisterMCCodeEmitter(TheMipselTarget,
+                                        createMipsMCCodeEmitter);
+  TargetRegistry::RegisterMCCodeEmitter(TheMips64Target,
+                                        createMipsMCCodeEmitter);
+  TargetRegistry::RegisterMCCodeEmitter(TheMips64elTarget,
+                                        createMipsMCCodeEmitter);
+
   // Register the MC subtarget info.
   TargetRegistry::RegisterMCSubtargetInfo(TheMipsTarget,
                                           createMipsMCSubtargetInfo);
diff --git a/lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.h b/lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.h
index 2f9efeea686..cb817c26260 100644
--- a/lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.h
+++ b/lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.h
@@ -15,15 +15,21 @@
 #define MIPSMCTARGETDESC_H
 
 namespace llvm {
+class MCInstrInfo;
+class MCCodeEmitter;
+class MCContext;
 class MCSubtargetInfo;
-class Target;
 class StringRef;
+class Target;
 
 extern Target TheMipsTarget;
 extern Target TheMipselTarget;
 extern Target TheMips64Target;
 extern Target TheMips64elTarget;
 
+MCCodeEmitter *createMipsMCCodeEmitter(const MCInstrInfo &MCII,
+                                       const MCSubtargetInfo &STI,
+                                       MCContext &Ctx);
 } // End llvm namespace
 
 // Defines symbolic names for Mips registers.  This defines a mapping from