1 //===- SkeletonInstrInfo.td - Describe the Instruction Set ------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Skeleton instruction information. Fill in stuff here.
12 //===----------------------------------------------------------------------===//
14 class Format<bits<4> val> {
18 // Some of the powerpc instruction formats, plus a pseudo-instruction format:
19 def Pseudo : Format<0>;
20 def IForm : Format<1>;
21 def BForm : Format<2>;
23 // Look at how other targets factor commonality between instructions.
24 class SkelInst<string nm, bits<6> opcd, Format f> : Instruction {
25 let Namespace = "Skeleton";
28 bits<6> Opcode = opcd;
30 bits<4> FormBits = Form.Value;
33 // Pseudo-instructions:
34 def PHI : SkelInst<"PHI", 0, Pseudo>; // PHI node...
35 def NOP : SkelInst<"NOP", 0, Pseudo>; // No-op
36 def ADJCALLSTACKDOWN : SkelInst<"ADJCALLSTACKDOWN", 0, Pseudo>;
37 def ADJCALLSTACKUP : SkelInst<"ADJCALLSTACKUP", 0, Pseudo>;