From 5ddb087f7fea1c4898d233a6cad6589d6f0a0b11 Mon Sep 17 00:00:00 2001
From: Nate Begeman <natebegeman@mac.com>
Date: Fri, 28 May 2010 01:08:32 +0000
Subject: [PATCH] Add support to tablegen for auto-generating arm_neon.h from a
 tablegen description of the intrinsics.  The goal is to auto-generate both
 support for GCC-style (vector) and ARM-style (struct of vector) intrinsics.

This is work in progress, but will be completed soon.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104910 91177308-0d34-0410-b5e6-96231b3b80d8
---
 utils/TableGen/CMakeLists.txt  |  1 +
 utils/TableGen/NeonEmitter.cpp | 62 ++++++++++++++++++++++++++++++++++
 utils/TableGen/NeonEmitter.h   | 34 +++++++++++++++++++
 utils/TableGen/TableGen.cpp    |  7 ++++
 4 files changed, 104 insertions(+)
 create mode 100644 utils/TableGen/NeonEmitter.cpp
 create mode 100644 utils/TableGen/NeonEmitter.h

diff --git a/utils/TableGen/CMakeLists.txt b/utils/TableGen/CMakeLists.txt
index 731cde92cfe..05520c147d4 100644
--- a/utils/TableGen/CMakeLists.txt
+++ b/utils/TableGen/CMakeLists.txt
@@ -22,6 +22,7 @@ add_executable(tblgen
   InstrInfoEmitter.cpp
   IntrinsicEmitter.cpp
   LLVMCConfigurationEmitter.cpp
+  NeonEmitter.cpp
   OptParserEmitter.cpp
   Record.cpp
   RegisterInfoEmitter.cpp
diff --git a/utils/TableGen/NeonEmitter.cpp b/utils/TableGen/NeonEmitter.cpp
new file mode 100644
index 00000000000..dcbcf759626
--- /dev/null
+++ b/utils/TableGen/NeonEmitter.cpp
@@ -0,0 +1,62 @@
+//===- NeonEmitter.cpp - Generate arm_neon.h for use with clang -*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This tablegen backend is responsible for emitting arm_neon.h, which includes
+// a declaration and definition of each function specified by the ARM NEON 
+// compiler interface.  See ARM document DUI0348B.
+//
+//===----------------------------------------------------------------------===//
+
+#include "NeonEmitter.h"
+#include "Record.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringMap.h"
+#include <string>
+
+using namespace llvm;
+
+void NeonEmitter::run(raw_ostream &OS) {
+  EmitSourceFileHeader("ARM NEON Header", OS);
+  
+  // FIXME: emit license into file?
+  
+  OS << "#ifndef __ARM_NEON_H\n";
+  OS << "#define __ARM_NEON_H\n\n";
+  
+  OS << "#ifndef __ARM_NEON__\n";
+  OS << "#error \"NEON support not enabled\"\n";
+  OS << "#endif\n\n";
+
+  OS << "#include <stdint.h>\n\n";
+  
+  // EmitTypedefs(OS);
+  
+  // Process Records
+  
+  std::vector<Record*> RV = Records.getAllDerivedDefinitions("Inst");
+  
+  // Unique the pattern types, and assign them 
+  
+  // emit #define directives for uniq'd prototypes
+  
+  // emit record directives
+  
+  for (unsigned i = 0, e = RV.size(); i != e; ++i) {
+    Record *R = RV[i];
+    
+    OS << LowercaseString(R->getName()) << "\n";
+
+    std::string Types = R->getValueAsString("Types");
+    std::string Pattern = R->getValueAsString("Pattern");
+    
+    OS << Types << "\n" << Pattern << "\n\n";
+  }
+  
+  OS << "#endif /* __ARM_NEON_H */\n";
+}
diff --git a/utils/TableGen/NeonEmitter.h b/utils/TableGen/NeonEmitter.h
new file mode 100644
index 00000000000..dc2079419d1
--- /dev/null
+++ b/utils/TableGen/NeonEmitter.h
@@ -0,0 +1,34 @@
+//===- NeonEmitter.h - Generate arm_neon.h for use with clang ---*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This tablegen backend is responsible for emitting arm_neon.h, which includes
+// a declaration and definition of each function specified by the ARM NEON 
+// compiler interface.  See ARM document DUI0348B.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef NEON_EMITTER_H
+#define NEON_EMITTER_H
+
+#include "TableGenBackend.h"
+
+namespace llvm {
+  
+  class NeonEmitter : public TableGenBackend {
+    RecordKeeper &Records;
+  public:
+    NeonEmitter(RecordKeeper &R) : Records(R) {}
+    
+    // runHeader - Emit a header file that allows use of the instruction table.
+    void run(raw_ostream &o);
+  };
+  
+} // End llvm namespace
+
+#endif
diff --git a/utils/TableGen/TableGen.cpp b/utils/TableGen/TableGen.cpp
index 0fbfec312cb..9485864a2ec 100644
--- a/utils/TableGen/TableGen.cpp
+++ b/utils/TableGen/TableGen.cpp
@@ -29,6 +29,7 @@
 #include "InstrInfoEmitter.h"
 #include "IntrinsicEmitter.h"
 #include "LLVMCConfigurationEmitter.h"
+#include "NeonEmitter.h"
 #include "OptParserEmitter.h"
 #include "Record.h"
 #include "RegisterInfoEmitter.h"
@@ -63,6 +64,7 @@ enum ActionType {
   GenTgtIntrinsic,
   GenLLVMCConf,
   GenEDHeader, GenEDInfo,
+  GenNeonHeader,
   PrintEnums
 };
 
@@ -119,6 +121,8 @@ namespace {
                                "Generate enhanced disassembly info header"),
                     clEnumValN(GenEDInfo, "gen-enhanced-disassembly-info",
                                "Generate enhanced disassembly info"),
+                    clEnumValN(GenNeonHeader, "gen-arm-neon-header",
+                               "Generate arm_neon.h for clang"),
                     clEnumValN(PrintEnums, "print-enums",
                                "Print enum values for a class"),
                     clEnumValEnd));
@@ -280,6 +284,9 @@ int main(int argc, char **argv) {
     case GenEDInfo:
       EDEmitter(Records).run(Out);
       break;
+    case GenNeonHeader:
+      NeonEmitter(Records).run(*Out);
+      break;
     case PrintEnums:
     {
       std::vector<Record*> Recs = Records.getAllDerivedDefinitions(Class);
-- 
2.34.1