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diff --git a/lib/Target/MBlaze/MBlazeCallingConv.td b/lib/Target/MBlaze/MBlazeCallingConv.td
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+++ b/lib/Target/MBlaze/MBlazeCallingConv.td
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+//===- MBlazeCallingConv.td - Calling Conventions for MBlaze ----*- C++ -*-===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+// This describes the calling conventions for MBlaze architecture.
+//===----------------------------------------------------------------------===//
+
+/// CCIfSubtarget - Match if the current subtarget has a feature F.
+class CCIfSubtarget<string F, CCAction A>: 
+  CCIf<!strconcat("State.getTarget().getSubtarget<MBlazeSubtarget>().", F), A>;
+
+//===----------------------------------------------------------------------===//
+// MBlaze ABI Calling Convention
+//===----------------------------------------------------------------------===//
+
+def CC_MBlaze : CallingConv<[
+  // Promote i8/i16 arguments to i32.
+  CCIfType<[i8, i16], CCPromoteToType<i32>>,
+
+  // Integer arguments are passed in integer registers.
+  CCIfType<[i32], CCAssignToReg<[R5, R6, R7, R8, R9, R10]>>,
+
+  // Single fp arguments are passed in floating point registers
+  CCIfType<[f32], CCAssignToReg<[F5, F6, F7, F8, F9, F10]>>,
+
+  // 32-bit values get stored in stack slots that are 4 bytes in
+  // size and 4-byte aligned.
+  CCIfType<[i32, f32], CCAssignToStack<4, 4>>
+]>;
+
+def RetCC_MBlaze : CallingConv<[
+  // i32 are returned in registers R3, R4
+  CCIfType<[i32], CCAssignToReg<[R3, R4]>>,
+
+  // f32 are returned in registers F3, F4
+  CCIfType<[f32], CCAssignToReg<[F3, F4]>>
+]>;