1 //===-- AMDGPURegisterInfo.cpp - AMDGPU Register Information -------------===//
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 /// \file
11 /// \brief Parent TargetRegisterInfo class common to all hw codegen targets.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #include "AMDGPURegisterInfo.h"
16 #include "AMDGPUTargetMachine.h"
17
18 using namespace llvm;
19
AMDGPURegisterInfo()20 AMDGPURegisterInfo::AMDGPURegisterInfo() : AMDGPUGenRegisterInfo(0) {}
21
22 //===----------------------------------------------------------------------===//
23 // Function handling callbacks - Functions are a seldom used feature of GPUS, so
24 // they are not supported at this time.
25 //===----------------------------------------------------------------------===//
26
27 // Dummy to not crash RegisterClassInfo.
28 static const MCPhysReg CalleeSavedReg = AMDGPU::NoRegister;
29
getCalleeSavedRegs(const MachineFunction *) const30 const MCPhysReg *AMDGPURegisterInfo::getCalleeSavedRegs(
31 const MachineFunction *) const {
32 return &CalleeSavedReg;
33 }
34
getFrameRegister(const MachineFunction & MF) const35 unsigned AMDGPURegisterInfo::getFrameRegister(const MachineFunction &MF) const {
36 return AMDGPU::NoRegister;
37 }
38
getSubRegFromChannel(unsigned Channel) const39 unsigned AMDGPURegisterInfo::getSubRegFromChannel(unsigned Channel) const {
40 static const unsigned SubRegs[] = {
41 AMDGPU::sub0, AMDGPU::sub1, AMDGPU::sub2, AMDGPU::sub3, AMDGPU::sub4,
42 AMDGPU::sub5, AMDGPU::sub6, AMDGPU::sub7, AMDGPU::sub8, AMDGPU::sub9,
43 AMDGPU::sub10, AMDGPU::sub11, AMDGPU::sub12, AMDGPU::sub13, AMDGPU::sub14,
44 AMDGPU::sub15
45 };
46
47 assert(Channel < array_lengthof(SubRegs));
48 return SubRegs[Channel];
49 }
50
51 #define GET_REGINFO_TARGET_DESC
52 #include "AMDGPUGenRegisterInfo.inc"
53