1 //===- PTXInstrInfo.cpp - PTX Instruction 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 //===----------------------------------------------------------------------===//
10 // This file contains the PTX implementation of the TargetInstrInfo class.
12 //===----------------------------------------------------------------------===//
15 #include "PTXInstrInfo.h"
16 #include "llvm/CodeGen/MachineInstrBuilder.h"
20 #include "PTXGenInstrInfo.inc"
22 PTXInstrInfo::PTXInstrInfo(PTXTargetMachine &_TM)
23 : TargetInstrInfoImpl(PTXInsts, array_lengthof(PTXInsts)),
24 RI(_TM, *this), TM(_TM) {}
26 static const struct map_entry {
27 const TargetRegisterClass *cls;
30 { &PTX::RRegs32RegClass, PTX::MOVrr },
31 { &PTX::PredsRegClass, PTX::MOVpp }
34 void PTXInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
35 MachineBasicBlock::iterator I, DebugLoc DL,
36 unsigned DstReg, unsigned SrcReg,
38 for (int i = 0, e = sizeof(map)/sizeof(map[0]); i != e; ++ i)
39 if (PTX::RRegs32RegClass.contains(DstReg, SrcReg)) {
41 get(PTX::MOVrr), DstReg).addReg(SrcReg, getKillRegState(KillSrc));
45 llvm_unreachable("Impossible reg-to-reg copy");
48 bool PTXInstrInfo::copyRegToReg(MachineBasicBlock &MBB,
49 MachineBasicBlock::iterator I,
50 unsigned DstReg, unsigned SrcReg,
51 const TargetRegisterClass *DstRC,
52 const TargetRegisterClass *SrcRC,
57 for (int i = 0, e = sizeof(map)/sizeof(map[0]); i != e; ++ i)
58 if (DstRC == map[i].cls) {
59 MachineInstr *MI = BuildMI(MBB, I, DL, get(map[i].opcode),
60 DstReg).addReg(SrcReg);
61 if (MI->findFirstPredOperandIdx() == -1) {
62 MI->addOperand(MachineOperand::CreateReg(0, false));
63 MI->addOperand(MachineOperand::CreateImm(/*IsInv=*/0));
71 bool PTXInstrInfo::isMoveInstr(const MachineInstr& MI,
72 unsigned &SrcReg, unsigned &DstReg,
73 unsigned &SrcSubIdx, unsigned &DstSubIdx) const {
74 switch (MI.getOpcode()) {
79 assert(MI.getNumOperands() >= 2 &&
80 MI.getOperand(0).isReg() && MI.getOperand(1).isReg() &&
81 "Invalid register-register move instruction");
82 SrcSubIdx = DstSubIdx = 0; // No sub-registers
83 DstReg = MI.getOperand(0).getReg();
84 SrcReg = MI.getOperand(1).getReg();