1 //===-- AMDGPURegisterInfo.cpp - AMDGPU Register Information -------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// \brief Parent TargetRegisterInfo class common to all hw codegen targets.
13 //===----------------------------------------------------------------------===//
15 #include "AMDGPURegisterInfo.h"
16 #include "AMDGPUTargetMachine.h"
20 AMDGPURegisterInfo::AMDGPURegisterInfo(const AMDGPUSubtarget &st)
21 : AMDGPUGenRegisterInfo(0),
25 //===----------------------------------------------------------------------===//
26 // Function handling callbacks - Functions are a seldom used feature of GPUS, so
27 // they are not supported at this time.
28 //===----------------------------------------------------------------------===//
30 const MCPhysReg AMDGPURegisterInfo::CalleeSavedReg = AMDGPU::NoRegister;
33 AMDGPURegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
34 return &CalleeSavedReg;
37 void AMDGPURegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator MI,
39 unsigned FIOperandNum,
40 RegScavenger *RS) const {
41 llvm_unreachable("Subroutines not supported yet");
44 unsigned AMDGPURegisterInfo::getFrameRegister(const MachineFunction &MF) const {
45 return AMDGPU::NoRegister;
48 unsigned AMDGPURegisterInfo::getSubRegFromChannel(unsigned Channel) const {
49 static const unsigned SubRegs[] = {
50 AMDGPU::sub0, AMDGPU::sub1, AMDGPU::sub2, AMDGPU::sub3, AMDGPU::sub4,
51 AMDGPU::sub5, AMDGPU::sub6, AMDGPU::sub7, AMDGPU::sub8, AMDGPU::sub9,
52 AMDGPU::sub10, AMDGPU::sub11, AMDGPU::sub12, AMDGPU::sub13, AMDGPU::sub14,
56 assert(Channel < array_lengthof(SubRegs));
57 return SubRegs[Channel];
60 unsigned AMDGPURegisterInfo::getIndirectSubReg(unsigned IndirectIndex) const {
62 return getSubRegFromChannel(IndirectIndex);
65 #define GET_REGINFO_TARGET_DESC
66 #include "AMDGPUGenRegisterInfo.inc"