Initial Mips support, here we go! =)

- Modifications from the last patch included
  (issues pointed by Evan Cheng are now fixed).
- Added more MipsI instructions.
- Added more patterns to match branch instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37461 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 63 insertions, 0 deletions

diff --git a/lib/Target/Mips/Mips.td b/lib/Target/Mips/Mips.td
new file mode 100644
index 0000000..662bc3b
--- /dev/null
+++ b/lib/Target/Mips/Mips.td
@@ -0,0 +1,63 @@
+//===- Mips.td - Describe the Mips Target Machine ---------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Bruno Cardoso Lopes and is distributed under the 
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+// Target-independent interfaces which we are implementing
+//===----------------------------------------------------------------------===//
+
+include "../Target.td"
+
+//===----------------------------------------------------------------------===//
+// Register File Description
+//===----------------------------------------------------------------------===//
+
+include "MipsRegisterInfo.td"
+
+//===----------------------------------------------------------------------===//
+// Subtarget features
+//===----------------------------------------------------------------------===//
+
+// TODO: dummy, needed to compile
+def FeatureCIX : SubtargetFeature<"r3000", "isR3000", "true",
+                                  "Enable r3000 extentions">;
+
+//===----------------------------------------------------------------------===//
+// Instruction Description
+//===----------------------------------------------------------------------===//
+
+include "MipsInstrInfo.td"
+
+def MipsInstrInfo : InstrInfo {
+  // Define how we want to layout our target-specific information field.
+  let TSFlagsFields = [];
+  let TSFlagsShifts = [];
+}
+//===----------------------------------------------------------------------===//
+// Calling Conventions
+//===----------------------------------------------------------------------===//
+
+include "MipsCallingConv.td"
+
+//===----------------------------------------------------------------------===//
+// Mips processors supported.
+//===----------------------------------------------------------------------===//
+
+class Proc<string Name, list<SubtargetFeature> Features>
+ : Processor<Name, NoItineraries, Features>;
+
+def : Proc<"generic", []>;
+
+//===----------------------------------------------------------------------===//
+// Declare the target which we are implementing
+//===----------------------------------------------------------------------===//
+
+def Mips : Target {
+  // Pull in Instruction Info:
+  let InstructionSet = MipsInstrInfo;
+}