1 //===-- R600RegisterInfo.h - R600 Register Info Interface ------*- C++ -*--===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // Interface definition for R600RegisterInfo
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef R600REGISTERINFO_H_
15 #define R600REGISTERINFO_H_
16 
17 #include "AMDGPUTargetMachine.h"
18 #include "AMDGPURegisterInfo.h"
19 
20 namespace llvm {
21 
22 class R600TargetMachine;
23 class TargetInstrInfo;
24 
25 struct R600RegisterInfo : public AMDGPURegisterInfo
26 {
27   AMDGPUTargetMachine &TM;
28   const TargetInstrInfo &TII;
29 
30   R600RegisterInfo(AMDGPUTargetMachine &tm, const TargetInstrInfo &tii);
31 
32   virtual BitVector getReservedRegs(const MachineFunction &MF) const;
33 
34   /// getISARegClass - rc is an AMDIL reg class.  This function returns the
35   /// R600 reg class that is equivalent to the given AMDIL reg class.
36   virtual const TargetRegisterClass * getISARegClass(
37     const TargetRegisterClass * rc) const;
38 
39   /// getHWRegIndex - get the HW encoding for a register.
40   unsigned getHWRegIndex(unsigned reg) const;
41 
42   /// getHWRegChan - get the HW encoding for a register's channel.
43   unsigned getHWRegChan(unsigned reg) const;
44 
45   /// getCFGStructurizerRegClass - get the register class of the specified
46   /// type to use in the CFGStructurizer
47   virtual const TargetRegisterClass * getCFGStructurizerRegClass(MVT VT) const;
48 
49   /// getSubRegFromChannel - Return the sub reg enum value for the given
50   /// Channel (e.g. getSubRegFromChannel(0) -> AMDGPU::sel_x)
51   unsigned getSubRegFromChannel(unsigned Channel) const;
52 
53 private:
54   /// getHWRegIndexGen - Generated function returns a register's encoding
55   unsigned getHWRegIndexGen(unsigned reg) const;
56   /// getHWRegChanGen - Generated function returns a register's channel
57   /// encoding.
58   unsigned getHWRegChanGen(unsigned reg) const;
59 };
60 
61 } // End namespace llvm
62 
63 #endif // AMDIDSAREGISTERINFO_H_
64